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PL286/external/libcups/cups/http.c

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/*
* HTTP routines for CUPS.
*
* Copyright 2007-2015 by Apple Inc.
* Copyright 1997-2007 by Easy Software Products, all rights reserved.
*
* This file contains Kerberos support code, copyright 2006 by
* Jelmer Vernooij.
*
* These coded instructions, statements, and computer programs are the
* property of Apple Inc. and are protected by Federal copyright
* law. Distribution and use rights are outlined in the file "LICENSE.txt"
* which should have been included with this file. If this file is
* missing or damaged, see the license at "http://www.cups.org/".
*
* This file is subject to the Apple OS-Developed Software exception.
*/
/*
* Include necessary headers...
*/
#include "cups-private.h"
#include <fcntl.h>
#include <math.h>
#ifdef WIN32
# include <tchar.h>
#else
# include <signal.h>
# include <sys/time.h>
# include <sys/resource.h>
#endif /* WIN32 */
#ifdef HAVE_POLL
# include <poll.h>
#endif /* HAVE_POLL */
/*
* Local functions...
*/
#ifdef HAVE_LIBZ
static void http_content_coding_finish(http_t *http);
static void http_content_coding_start(http_t *http,
const char *value);
#endif /* HAVE_LIBZ */
static http_t *http_create(const char *host, int port,
http_addrlist_t *addrlist, int family,
http_encryption_t encryption,
int blocking, _http_mode_t mode);
#ifdef DEBUG
static void http_debug_hex(const char *prefix, const char *buffer,
int bytes);
#endif /* DEBUG */
static ssize_t http_read(http_t *http, char *buffer, size_t length);
static ssize_t http_read_buffered(http_t *http, char *buffer, size_t length);
static ssize_t http_read_chunk(http_t *http, char *buffer, size_t length);
static int http_send(http_t *http, http_state_t request,
const char *uri);
static ssize_t http_write(http_t *http, const char *buffer,
size_t length);
static ssize_t http_write_chunk(http_t *http, const char *buffer,
size_t length);
static off_t http_set_length(http_t *http);
static void http_set_timeout(int fd, double timeout);
static void http_set_wait(http_t *http);
#ifdef HAVE_SSL
static int http_tls_upgrade(http_t *http);
#endif /* HAVE_SSL */
/*
* Local globals...
*/
static const char * const http_fields[] =
{
"Accept-Language",
"Accept-Ranges",
"Authorization",
"Connection",
"Content-Encoding",
"Content-Language",
"Content-Length",
"Content-Location",
"Content-MD5",
"Content-Range",
"Content-Type",
"Content-Version",
"Date",
"Host",
"If-Modified-Since",
"If-Unmodified-since",
"Keep-Alive",
"Last-Modified",
"Link",
"Location",
"Range",
"Referer",
"Retry-After",
"Transfer-Encoding",
"Upgrade",
"User-Agent",
"WWW-Authenticate",
"Accept-Encoding",
"Allow",
"Server"
};
/*
* 'httpAcceptConnection()' - Accept a new HTTP client connection from the
* specified listening socket.
*
* @since CUPS 1.7/macOS 10.9@
*/
http_t * /* O - HTTP connection or @code NULL@ */
httpAcceptConnection(int fd, /* I - Listen socket file descriptor */
int blocking) /* I - 1 if the connection should be
blocking, 0 otherwise */
{
http_t *http; /* HTTP connection */
http_addrlist_t addrlist; /* Dummy address list */
socklen_t addrlen; /* Length of address */
int val; /* Socket option value */
/*
* Range check input...
*/
if (fd < 0)
return (NULL);
/*
* Create the client connection...
*/
memset(&addrlist, 0, sizeof(addrlist));
if ((http = http_create(NULL, 0, &addrlist, AF_UNSPEC,
HTTP_ENCRYPTION_IF_REQUESTED, blocking,
_HTTP_MODE_SERVER)) == NULL)
return (NULL);
/*
* Accept the client and get the remote address...
*/
addrlen = sizeof(http_addr_t);
if ((http->fd = accept(fd, (struct sockaddr *)&(http->addrlist->addr),
&addrlen)) < 0)
{
_cupsSetHTTPError(HTTP_STATUS_ERROR);
httpClose(http);
return (NULL);
}
http->hostaddr = &(http->addrlist->addr);
if (httpAddrLocalhost(http->hostaddr))
strlcpy(http->hostname, "localhost", sizeof(http->hostname));
else
httpAddrString(http->hostaddr, http->hostname, sizeof(http->hostname));
#ifdef SO_NOSIGPIPE
/*
* Disable SIGPIPE for this socket.
*/
val = 1;
setsockopt(http->fd, SOL_SOCKET, SO_NOSIGPIPE, CUPS_SOCAST &val, sizeof(val));
#endif /* SO_NOSIGPIPE */
/*
* Using TCP_NODELAY improves responsiveness, especially on systems
* with a slow loopback interface. Since we write large buffers
* when sending print files and requests, there shouldn't be any
* performance penalty for this...
*/
val = 1;
setsockopt(http->fd, IPPROTO_TCP, TCP_NODELAY, CUPS_SOCAST &val, sizeof(val));
#ifdef FD_CLOEXEC
/*
* Close this socket when starting another process...
*/
fcntl(http->fd, F_SETFD, FD_CLOEXEC);
#endif /* FD_CLOEXEC */
return (http);
}
/*
* 'httpAddCredential()' - Allocates and adds a single credential to an array.
*
* Use @code cupsArrayNew(NULL, NULL)@ to create a credentials array.
*
* @since CUPS 1.5/macOS 10.7@
*/
int /* O - 0 on success, -1 on error */
httpAddCredential(
cups_array_t *credentials, /* I - Credentials array */
const void *data, /* I - PEM-encoded X.509 data */
size_t datalen) /* I - Length of data */
{
http_credential_t *credential; /* Credential data */
if ((credential = malloc(sizeof(http_credential_t))) != NULL)
{
credential->datalen = datalen;
if ((credential->data = malloc(datalen)) != NULL)
{
memcpy(credential->data, data, datalen);
cupsArrayAdd(credentials, credential);
return (0);
}
free(credential);
}
return (-1);
}
/*
* 'httpBlocking()' - Set blocking/non-blocking behavior on a connection.
*/
void
httpBlocking(http_t *http, /* I - HTTP connection */
int b) /* I - 1 = blocking, 0 = non-blocking */
{
if (http)
{
http->blocking = b;
http_set_wait(http);
}
}
/*
* 'httpCheck()' - Check to see if there is a pending response from the server.
*/
int /* O - 0 = no data, 1 = data available */
httpCheck(http_t *http) /* I - HTTP connection */
{
return (httpWait(http, 0));
}
/*
* 'httpClearCookie()' - Clear the cookie value(s).
*
* @since CUPS 1.1.19/macOS 10.3@
*/
void
httpClearCookie(http_t *http) /* I - HTTP connection */
{
if (!http)
return;
if (http->cookie)
{
free(http->cookie);
http->cookie = NULL;
}
}
/*
* 'httpClearFields()' - Clear HTTP request fields.
*/
void
httpClearFields(http_t *http) /* I - HTTP connection */
{
DEBUG_printf(("httpClearFields(http=%p)", (void *)http));
if (http)
{
memset(http->fields, 0, sizeof(http->fields));
if (http->mode == _HTTP_MODE_CLIENT)
{
if (http->hostname[0] == '/')
httpSetField(http, HTTP_FIELD_HOST, "localhost");
else
httpSetField(http, HTTP_FIELD_HOST, http->hostname);
}
if (http->field_authorization)
{
free(http->field_authorization);
http->field_authorization = NULL;
}
if (http->accept_encoding)
{
_cupsStrFree(http->accept_encoding);
http->accept_encoding = NULL;
}
if (http->allow)
{
_cupsStrFree(http->allow);
http->allow = NULL;
}
if (http->server)
{
_cupsStrFree(http->server);
http->server = NULL;
}
http->expect = (http_status_t)0;
}
}
/*
* 'httpClose()' - Close an HTTP connection.
*/
void
httpClose(http_t *http) /* I - HTTP connection */
{
#ifdef HAVE_GSSAPI
OM_uint32 minor_status; /* Minor status code */
#endif /* HAVE_GSSAPI */
DEBUG_printf(("httpClose(http=%p)", (void *)http));
/*
* Range check input...
*/
if (!http)
return;
/*
* Close any open connection...
*/
_httpDisconnect(http);
/*
* Free memory used...
*/
httpAddrFreeList(http->addrlist);
if (http->cookie)
free(http->cookie);
#ifdef HAVE_GSSAPI
if (http->gssctx != GSS_C_NO_CONTEXT)
gss_delete_sec_context(&minor_status, &http->gssctx, GSS_C_NO_BUFFER);
if (http->gssname != GSS_C_NO_NAME)
gss_release_name(&minor_status, &http->gssname);
#endif /* HAVE_GSSAPI */
#ifdef HAVE_AUTHORIZATION_H
if (http->auth_ref)
AuthorizationFree(http->auth_ref, kAuthorizationFlagDefaults);
#endif /* HAVE_AUTHORIZATION_H */
httpClearFields(http);
if (http->authstring && http->authstring != http->_authstring)
free(http->authstring);
free(http);
}
/*
* 'httpCompareCredentials()' - Compare two sets of X.509 credentials.
*
* @since CUPS 2.0/OS 10.10@
*/
int /* O - 1 if they match, 0 if they do not */
httpCompareCredentials(
cups_array_t *cred1, /* I - First set of X.509 credentials */
cups_array_t *cred2) /* I - Second set of X.509 credentials */
{
http_credential_t *temp1, *temp2; /* Temporary credentials */
for (temp1 = (http_credential_t *)cupsArrayFirst(cred1), temp2 = (http_credential_t *)cupsArrayFirst(cred2); temp1 && temp2; temp1 = (http_credential_t *)cupsArrayNext(cred1), temp2 = (http_credential_t *)cupsArrayNext(cred2))
if (temp1->datalen != temp2->datalen)
return (0);
else if (memcmp(temp1->data, temp2->data, temp1->datalen))
return (0);
return (temp1 == temp2);
}
/*
* 'httpConnect()' - Connect to a HTTP server.
*
* This function is deprecated - use @link httpConnect2@ instead.
*
* @deprecated@
*/
http_t * /* O - New HTTP connection */
httpConnect(const char *host, /* I - Host to connect to */
int port) /* I - Port number */
{
return (httpConnect2(host, port, NULL, AF_UNSPEC,
HTTP_ENCRYPTION_IF_REQUESTED, 1, 30000, NULL));
}
/*
* 'httpConnect2()' - Connect to a HTTP server.
*
* @since CUPS 1.7/macOS 10.9@
*/
http_t * /* O - New HTTP connection */
httpConnect2(
const char *host, /* I - Host to connect to */
int port, /* I - Port number */
http_addrlist_t *addrlist, /* I - List of addresses or NULL to lookup */
int family, /* I - Address family to use or @code AF_UNSPEC@ for any */
http_encryption_t encryption, /* I - Type of encryption to use */
int blocking, /* I - 1 for blocking connection, 0 for non-blocking */
int msec, /* I - Connection timeout in milliseconds, 0 means don't connect */
int *cancel) /* I - Pointer to "cancel" variable */
{
http_t *http; /* New HTTP connection */
DEBUG_printf(("httpConnect2(host=\"%s\", port=%d, addrlist=%p, family=%d, encryption=%d, blocking=%d, msec=%d, cancel=%p)", host, port, (void *)addrlist, family, encryption, blocking, msec, (void *)cancel));
/*
* Create the HTTP structure...
*/
if ((http = http_create(host, port, addrlist, family, encryption, blocking,
_HTTP_MODE_CLIENT)) == NULL)
return (NULL);
/*
* Optionally connect to the remote system...
*/
if (msec == 0 || !httpReconnect2(http, msec, cancel))
return (http);
/*
* Could not connect to any known address - bail out!
*/
httpClose(http);
return (NULL);
}
/*
* 'httpConnectEncrypt()' - Connect to a HTTP server using encryption.
*
* This function is now deprecated. Please use the @link httpConnect2@ function
* instead.
*
* @deprecated@
*/
http_t * /* O - New HTTP connection */
httpConnectEncrypt(
const char *host, /* I - Host to connect to */
int port, /* I - Port number */
http_encryption_t encryption) /* I - Type of encryption to use */
{
DEBUG_printf(("httpConnectEncrypt(host=\"%s\", port=%d, encryption=%d)",
host, port, encryption));
return (httpConnect2(host, port, NULL, AF_UNSPEC, encryption, 1, 30000,
NULL));
}
/*
* 'httpDelete()' - Send a DELETE request to the server.
*/
int /* O - Status of call (0 = success) */
httpDelete(http_t *http, /* I - HTTP connection */
const char *uri) /* I - URI to delete */
{
return (http_send(http, HTTP_STATE_DELETE, uri));
}
/*
* '_httpDisconnect()' - Disconnect a HTTP connection.
*/
void
_httpDisconnect(http_t *http) /* I - HTTP connection */
{
#ifdef HAVE_SSL
if (http->tls)
_httpTLSStop(http);
#endif /* HAVE_SSL */
httpAddrClose(NULL, http->fd);
http->fd = -1;
}
/*
* 'httpEncryption()' - Set the required encryption on the link.
*/
int /* O - -1 on error, 0 on success */
httpEncryption(http_t *http, /* I - HTTP connection */
http_encryption_t e) /* I - New encryption preference */
{
DEBUG_printf(("httpEncryption(http=%p, e=%d)", (void *)http, e));
#ifdef HAVE_SSL
if (!http)
return (0);
if (http->mode == _HTTP_MODE_CLIENT)
{
http->encryption = e;
if ((http->encryption == HTTP_ENCRYPTION_ALWAYS && !http->tls) ||
(http->encryption == HTTP_ENCRYPTION_NEVER && http->tls))
return (httpReconnect2(http, 30000, NULL));
else if (http->encryption == HTTP_ENCRYPTION_REQUIRED && !http->tls)
return (http_tls_upgrade(http));
else
return (0);
}
else
{
if (e == HTTP_ENCRYPTION_NEVER && http->tls)
return (-1);
http->encryption = e;
if (e != HTTP_ENCRYPTION_IF_REQUESTED && !http->tls)
return (_httpTLSStart(http));
else
return (0);
}
#else
if (e == HTTP_ENCRYPTION_ALWAYS || e == HTTP_ENCRYPTION_REQUIRED)
return (-1);
else
return (0);
#endif /* HAVE_SSL */
}
/*
* 'httpError()' - Get the last error on a connection.
*/
int /* O - Error code (errno) value */
httpError(http_t *http) /* I - HTTP connection */
{
if (http)
return (http->error);
else
return (EINVAL);
}
/*
* 'httpFieldValue()' - Return the HTTP field enumeration value for a field
* name.
*/
http_field_t /* O - Field index */
httpFieldValue(const char *name) /* I - String name */
{
int i; /* Looping var */
for (i = 0; i < HTTP_FIELD_MAX; i ++)
if (!_cups_strcasecmp(name, http_fields[i]))
return ((http_field_t)i);
return (HTTP_FIELD_UNKNOWN);
}
/*
* 'httpFlush()' - Flush data from a HTTP connection.
*/
void
httpFlush(http_t *http) /* I - HTTP connection */
{
char buffer[8192]; /* Junk buffer */
int blocking; /* To block or not to block */
http_state_t oldstate; /* Old state */
DEBUG_printf(("httpFlush(http=%p), state=%s", (void *)http, httpStateString(http->state)));
/*
* Nothing to do if we are in the "waiting" state...
*/
if (http->state == HTTP_STATE_WAITING)
return;
/*
* Temporarily set non-blocking mode so we don't get stuck in httpRead()...
*/
blocking = http->blocking;
http->blocking = 0;
/*
* Read any data we can...
*/
oldstate = http->state;
while (httpRead2(http, buffer, sizeof(buffer)) > 0);
/*
* Restore blocking and reset the connection if we didn't get all of
* the remaining data...
*/
http->blocking = blocking;
if (http->state == oldstate && http->state != HTTP_STATE_WAITING &&
http->fd >= 0)
{
/*
* Didn't get the data back, so close the current connection.
*/
#ifdef HAVE_LIBZ
if (http->coding)
http_content_coding_finish(http);
#endif /* HAVE_LIBZ */
DEBUG_puts("1httpFlush: Setting state to HTTP_STATE_WAITING and closing.");
http->state = HTTP_STATE_WAITING;
#ifdef HAVE_SSL
if (http->tls)
_httpTLSStop(http);
#endif /* HAVE_SSL */
httpAddrClose(NULL, http->fd);
http->fd = -1;
}
}
/*
* 'httpFlushWrite()' - Flush data in write buffer.
*
* @since CUPS 1.2/macOS 10.5@
*/
int /* O - Bytes written or -1 on error */
httpFlushWrite(http_t *http) /* I - HTTP connection */
{
ssize_t bytes; /* Bytes written */
DEBUG_printf(("httpFlushWrite(http=%p) data_encoding=%d", (void *)http, http ? http->data_encoding : 100));
if (!http || !http->wused)
{
DEBUG_puts(http ? "1httpFlushWrite: Write buffer is empty." :
"1httpFlushWrite: No connection.");
return (0);
}
if (http->data_encoding == HTTP_ENCODING_CHUNKED)
bytes = http_write_chunk(http, http->wbuffer, (size_t)http->wused);
else
bytes = http_write(http, http->wbuffer, (size_t)http->wused);
http->wused = 0;
DEBUG_printf(("1httpFlushWrite: Returning %d, errno=%d.", (int)bytes, errno));
return ((int)bytes);
}
/*
* 'httpFreeCredentials()' - Free an array of credentials.
*/
void
httpFreeCredentials(
cups_array_t *credentials) /* I - Array of credentials */
{
http_credential_t *credential; /* Credential */
for (credential = (http_credential_t *)cupsArrayFirst(credentials);
credential;
credential = (http_credential_t *)cupsArrayNext(credentials))
{
cupsArrayRemove(credentials, credential);
free((void *)credential->data);
free(credential);
}
cupsArrayDelete(credentials);
}
/*
* 'httpGet()' - Send a GET request to the server.
*/
int /* O - Status of call (0 = success) */
httpGet(http_t *http, /* I - HTTP connection */
const char *uri) /* I - URI to get */
{
return (http_send(http, HTTP_STATE_GET, uri));
}
/*
* 'httpGetActivity()' - Get the most recent activity for a connection.
*
* The return value is the UNIX time of the last read or write.
*
* @since CUPS 2.0/OS 10.10@
*/
time_t /* O - Time of last read or write */
httpGetActivity(http_t *http) /* I - HTTP connection */
{
return (http ? http->activity : 0);
}
/*
* 'httpGetAuthString()' - Get the current authorization string.
*
* The authorization string is set by cupsDoAuthentication() and
* httpSetAuthString(). Use httpGetAuthString() to retrieve the
* string to use with httpSetField() for the HTTP_FIELD_AUTHORIZATION
* value.
*
* @since CUPS 1.3/macOS 10.5@
*/
char * /* O - Authorization string */
httpGetAuthString(http_t *http) /* I - HTTP connection */
{
if (http)
return (http->authstring);
else
return (NULL);
}
/*
* 'httpGetBlocking()' - Get the blocking/non-block state of a connection.
*
* @since CUPS 1.2/macOS 10.5@
*/
int /* O - 1 if blocking, 0 if non-blocking */
httpGetBlocking(http_t *http) /* I - HTTP connection */
{
return (http ? http->blocking : 0);
}
/*
* 'httpGetContentEncoding()' - Get a common content encoding, if any, between
* the client and server.
*
* This function uses the value of the Accepts-Encoding HTTP header and must be
* called after receiving a response from the server or a request from the
* client. The value returned can be use in subsequent requests (for clients)
* or in the response (for servers) in order to compress the content stream.
*
* @since CUPS 1.7/macOS 10.9@
*/
const char * /* O - Content-Coding value or
@code NULL@ for the identity
coding. */
httpGetContentEncoding(http_t *http) /* I - HTTP connection */
{
#ifdef HAVE_LIBZ
if (http && http->accept_encoding)
{
int i; /* Looping var */
char temp[HTTP_MAX_VALUE], /* Copy of Accepts-Encoding value */
*start, /* Start of coding value */
*end; /* End of coding value */
double qvalue; /* "qvalue" for coding */
struct lconv *loc = localeconv(); /* Locale data */
static const char * const codings[] =
{ /* Supported content codings */
"deflate",
"gzip",
"x-deflate",
"x-gzip"
};
strlcpy(temp, http->accept_encoding, sizeof(temp));
for (start = temp; *start; start = end)
{
/*
* Find the end of the coding name...
*/
qvalue = 1.0;
end = start;
while (*end && *end != ';' && *end != ',' && !isspace(*end & 255))
end ++;
if (*end == ';')
{
/*
* Grab the qvalue as needed...
*/
if (!strncmp(end, ";q=", 3))
qvalue = _cupsStrScand(end + 3, NULL, loc);
/*
* Skip past all attributes...
*/
*end++ = '\0';
while (*end && *end != ',' && !isspace(*end & 255))
end ++;
}
else if (*end)
*end++ = '\0';
while (*end && isspace(*end & 255))
end ++;
/*
* Check value if it matches something we support...
*/
if (qvalue <= 0.0)
continue;
for (i = 0; i < (int)(sizeof(codings) / sizeof(codings[0])); i ++)
if (!strcmp(start, codings[i]))
return (codings[i]);
}
}
#endif /* HAVE_LIBZ */
return (NULL);
}
/*
* 'httpGetCookie()' - Get any cookie data from the response.
*
* @since CUPS 1.1.19/macOS 10.3@
*/
const char * /* O - Cookie data or NULL */
httpGetCookie(http_t *http) /* I - HTTP connection */
{
return (http ? http->cookie : NULL);
}
/*
* 'httpGetEncryption()' - Get the current encryption mode of a connection.
*
* This function returns the encryption mode for the connection. Use the
* @link httpIsEncrypted@ function to determine whether a TLS session has
* been established.
*
* @since CUPS 2.0/OS 10.10@
*/
http_encryption_t /* O - Current encryption mode */
httpGetEncryption(http_t *http) /* I - HTTP connection */
{
return (http ? http->encryption : HTTP_ENCRYPTION_IF_REQUESTED);
}
/*
* 'httpGetExpect()' - Get the value of the Expect header, if any.
*
* Returns @code HTTP_STATUS_NONE@ if there is no Expect header, otherwise
* returns the expected HTTP status code, typically @code HTTP_STATUS_CONTINUE@.
*
* @since CUPS 1.7/macOS 10.9@
*/
http_status_t /* O - Expect: status, if any */
httpGetExpect(http_t *http) /* I - HTTP connection */
{
if (!http)
return (HTTP_STATUS_ERROR);
else
return (http->expect);
}
/*
* 'httpGetFd()' - Get the file descriptor associated with a connection.
*
* @since CUPS 1.2/macOS 10.5@
*/
int /* O - File descriptor or -1 if none */
httpGetFd(http_t *http) /* I - HTTP connection */
{
return (http ? http->fd : -1);
}
/*
* 'httpGetField()' - Get a field value from a request/response.
*/
const char * /* O - Field value */
httpGetField(http_t *http, /* I - HTTP connection */
http_field_t field) /* I - Field to get */
{
if (!http || field <= HTTP_FIELD_UNKNOWN || field >= HTTP_FIELD_MAX)
return (NULL);
switch (field)
{
case HTTP_FIELD_ACCEPT_ENCODING :
return (http->accept_encoding);
case HTTP_FIELD_ALLOW :
return (http->allow);
case HTTP_FIELD_SERVER :
return (http->server);
case HTTP_FIELD_AUTHORIZATION :
if (http->field_authorization)
{
/*
* Special case for WWW-Authenticate: as its contents can be
* longer than HTTP_MAX_VALUE...
*/
return (http->field_authorization);
}
default :
return (http->fields[field]);
}
}
/*
* 'httpGetKeepAlive()' - Get the current Keep-Alive state of the connection.
*
* @since CUPS 2.0/OS 10.10@
*/
http_keepalive_t /* O - Keep-Alive state */
httpGetKeepAlive(http_t *http) /* I - HTTP connection */
{
return (http ? http->keep_alive : HTTP_KEEPALIVE_OFF);
}
/*
* 'httpGetLength()' - Get the amount of data remaining from the
* content-length or transfer-encoding fields.
*
* This function is deprecated and will not return lengths larger than
* 2^31 - 1; use httpGetLength2() instead.
*
* @deprecated@
*/
int /* O - Content length */
httpGetLength(http_t *http) /* I - HTTP connection */
{
/*
* Get the read content length and return the 32-bit value.
*/
if (http)
{
httpGetLength2(http);
return (http->_data_remaining);
}
else
return (-1);
}
/*
* 'httpGetLength2()' - Get the amount of data remaining from the
* content-length or transfer-encoding fields.
*
* This function returns the complete content length, even for
* content larger than 2^31 - 1.
*
* @since CUPS 1.2/macOS 10.5@
*/
off_t /* O - Content length */
httpGetLength2(http_t *http) /* I - HTTP connection */
{
off_t remaining; /* Remaining length */
DEBUG_printf(("2httpGetLength2(http=%p), state=%s", (void *)http, httpStateString(http->state)));
if (!http)
return (-1);
if (!_cups_strcasecmp(http->fields[HTTP_FIELD_TRANSFER_ENCODING], "chunked"))
{
DEBUG_puts("4httpGetLength2: chunked request!");
remaining = 0;
}
else
{
/*
* The following is a hack for HTTP servers that don't send a
* Content-Length or Transfer-Encoding field...
*
* If there is no Content-Length then the connection must close
* after the transfer is complete...
*/
if (!http->fields[HTTP_FIELD_CONTENT_LENGTH][0])
{
/*
* Default content length is 0 for errors and certain types of operations,
* and 2^31-1 for other successful requests...
*/
if (http->status >= HTTP_STATUS_MULTIPLE_CHOICES ||
http->state == HTTP_STATE_OPTIONS ||
(http->state == HTTP_STATE_GET && http->mode == _HTTP_MODE_SERVER) ||
http->state == HTTP_STATE_HEAD ||
(http->state == HTTP_STATE_PUT && http->mode == _HTTP_MODE_CLIENT) ||
http->state == HTTP_STATE_DELETE ||
http->state == HTTP_STATE_TRACE ||
http->state == HTTP_STATE_CONNECT)
remaining = 0;
else
remaining = 2147483647;
}
else if ((remaining = strtoll(http->fields[HTTP_FIELD_CONTENT_LENGTH],
NULL, 10)) < 0)
remaining = -1;
DEBUG_printf(("4httpGetLength2: content_length=" CUPS_LLFMT,
CUPS_LLCAST remaining));
}
return (remaining);
}
/*
* 'httpGetPending()' - Get the number of bytes that are buffered for writing.
*
* @since CUPS 2.0/OS 10.10@
*/
size_t /* O - Number of bytes buffered */
httpGetPending(http_t *http) /* I - HTTP connection */
{
return (http ? (size_t)http->wused : 0);
}
/*
* 'httpGetReady()' - Get the number of bytes that can be read without blocking.
*
* @since CUPS 2.0/OS 10.10@
*/
size_t /* O - Number of bytes available */
httpGetReady(http_t *http) /* I - HTTP connection */
{
if (!http)
return (0);
else if (http->used > 0)
return ((size_t)http->used);
#ifdef HAVE_SSL
else if (http->tls)
return (_httpTLSPending(http));
#endif /* HAVE_SSL */
return (0);
}
/*
* 'httpGetRemaining()' - Get the number of remaining bytes in the message
* body or current chunk.
*
* The @link httpIsChunked@ function can be used to determine whether the
* message body is chunked or fixed-length.
*
* @since CUPS 2.0/OS 10.10@
*/
size_t /* O - Remaining bytes */
httpGetRemaining(http_t *http) /* I - HTTP connection */
{
return (http ? (size_t)http->data_remaining : 0);
}
/*
* 'httpGets()' - Get a line of text from a HTTP connection.
*/
char * /* O - Line or NULL */
httpGets(char *line, /* I - Line to read into */
int length, /* I - Max length of buffer */
http_t *http) /* I - HTTP connection */
{
char *lineptr, /* Pointer into line */
*lineend, /* End of line */
*bufptr, /* Pointer into input buffer */
*bufend; /* Pointer to end of buffer */
ssize_t bytes; /* Number of bytes read */
int eol; /* End-of-line? */
DEBUG_printf(("2httpGets(line=%p, length=%d, http=%p)", (void *)line, length, (void *)http));
if (!http || !line || length <= 1)
return (NULL);
/*
* Read a line from the buffer...
*/
http->error = 0;
lineptr = line;
lineend = line + length - 1;
eol = 0;
while (lineptr < lineend)
{
/*
* Pre-load the buffer as needed...
*/
#ifdef WIN32
WSASetLastError(0);
#else
errno = 0;
#endif /* WIN32 */
while (http->used == 0)
{
/*
* No newline; see if there is more data to be read...
*/
while (!_httpWait(http, http->wait_value, 1))
{
if (http->timeout_cb && (*http->timeout_cb)(http, http->timeout_data))
continue;
DEBUG_puts("3httpGets: Timed out!");
#ifdef WIN32
http->error = WSAETIMEDOUT;
#else
http->error = ETIMEDOUT;
#endif /* WIN32 */
return (NULL);
}
bytes = http_read(http, http->buffer + http->used, (size_t)(HTTP_MAX_BUFFER - http->used));
DEBUG_printf(("4httpGets: read " CUPS_LLFMT " bytes.", CUPS_LLCAST bytes));
if (bytes < 0)
{
/*
* Nope, can't get a line this time...
*/
#ifdef WIN32
DEBUG_printf(("3httpGets: recv() error %d!", WSAGetLastError()));
if (WSAGetLastError() == WSAEINTR)
continue;
else if (WSAGetLastError() == WSAEWOULDBLOCK)
{
if (http->timeout_cb && (*http->timeout_cb)(http, http->timeout_data))
continue;
http->error = WSAGetLastError();
}
else if (WSAGetLastError() != http->error)
{
http->error = WSAGetLastError();
continue;
}
#else
DEBUG_printf(("3httpGets: recv() error %d!", errno));
if (errno == EINTR)
continue;
else if (errno == EWOULDBLOCK || errno == EAGAIN)
{
if (http->timeout_cb && (*http->timeout_cb)(http, http->timeout_data))
continue;
else if (!http->timeout_cb && errno == EAGAIN)
continue;
http->error = errno;
}
else if (errno != http->error)
{
http->error = errno;
continue;
}
#endif /* WIN32 */
return (NULL);
}
else if (bytes == 0)
{
http->error = EPIPE;
return (NULL);
}
/*
* Yup, update the amount used...
*/
http->used += (int)bytes;
}
/*
* Now copy as much of the current line as possible...
*/
for (bufptr = http->buffer, bufend = http->buffer + http->used;
lineptr < lineend && bufptr < bufend;)
{
if (*bufptr == 0x0a)
{
eol = 1;
bufptr ++;
break;
}
else if (*bufptr == 0x0d)
bufptr ++;
else
*lineptr++ = *bufptr++;
}
http->used -= (int)(bufptr - http->buffer);
if (http->used > 0)
memmove(http->buffer, bufptr, (size_t)http->used);
if (eol)
{
/*
* End of line...
*/
http->activity = time(NULL);
*lineptr = '\0';
DEBUG_printf(("3httpGets: Returning \"%s\"", line));
return (line);
}
}
DEBUG_puts("3httpGets: No new line available!");
return (NULL);
}
/*
* 'httpGetState()' - Get the current state of the HTTP request.
*/
http_state_t /* O - HTTP state */
httpGetState(http_t *http) /* I - HTTP connection */
{
return (http ? http->state : HTTP_STATE_ERROR);
}
/*
* 'httpGetStatus()' - Get the status of the last HTTP request.
*
* @since CUPS 1.2/macOS 10.5@
*/
http_status_t /* O - HTTP status */
httpGetStatus(http_t *http) /* I - HTTP connection */
{
return (http ? http->status : HTTP_STATUS_ERROR);
}
/*
* 'httpGetSubField()' - Get a sub-field value.
*
* @deprecated@
*/
char * /* O - Value or NULL */
httpGetSubField(http_t *http, /* I - HTTP connection */
http_field_t field, /* I - Field index */
const char *name, /* I - Name of sub-field */
char *value) /* O - Value string */
{
return (httpGetSubField2(http, field, name, value, HTTP_MAX_VALUE));
}
/*
* 'httpGetSubField2()' - Get a sub-field value.
*
* @since CUPS 1.2/macOS 10.5@
*/
char * /* O - Value or NULL */
httpGetSubField2(http_t *http, /* I - HTTP connection */
http_field_t field, /* I - Field index */
const char *name, /* I - Name of sub-field */
char *value, /* O - Value string */
int valuelen) /* I - Size of value buffer */
{
const char *fptr; /* Pointer into field */
char temp[HTTP_MAX_VALUE], /* Temporary buffer for name */
*ptr, /* Pointer into string buffer */
*end; /* End of value buffer */
DEBUG_printf(("2httpGetSubField2(http=%p, field=%d, name=\"%s\", value=%p, valuelen=%d)", (void *)http, field, name, (void *)value, valuelen));
if (!http || !name || !value || valuelen < 2 ||
field <= HTTP_FIELD_UNKNOWN || field >= HTTP_FIELD_MAX)
return (NULL);
end = value + valuelen - 1;
for (fptr = http->fields[field]; *fptr;)
{
/*
* Skip leading whitespace...
*/
while (_cups_isspace(*fptr))
fptr ++;
if (*fptr == ',')
{
fptr ++;
continue;
}
/*
* Get the sub-field name...
*/
for (ptr = temp;
*fptr && *fptr != '=' && !_cups_isspace(*fptr) &&
ptr < (temp + sizeof(temp) - 1);
*ptr++ = *fptr++);
*ptr = '\0';
DEBUG_printf(("4httpGetSubField2: name=\"%s\"", temp));
/*
* Skip trailing chars up to the '='...
*/
while (_cups_isspace(*fptr))
fptr ++;
if (!*fptr)
break;
if (*fptr != '=')
continue;
/*
* Skip = and leading whitespace...
*/
fptr ++;
while (_cups_isspace(*fptr))
fptr ++;
if (*fptr == '\"')
{
/*
* Read quoted string...
*/
for (ptr = value, fptr ++;
*fptr && *fptr != '\"' && ptr < end;
*ptr++ = *fptr++);
*ptr = '\0';
while (*fptr && *fptr != '\"')
fptr ++;
if (*fptr)
fptr ++;
}
else
{
/*
* Read unquoted string...
*/
for (ptr = value;
*fptr && !_cups_isspace(*fptr) && *fptr != ',' && ptr < end;
*ptr++ = *fptr++);
*ptr = '\0';
while (*fptr && !_cups_isspace(*fptr) && *fptr != ',')
fptr ++;
}
DEBUG_printf(("4httpGetSubField2: value=\"%s\"", value));
/*
* See if this is the one...
*/
if (!strcmp(name, temp))
{
DEBUG_printf(("3httpGetSubField2: Returning \"%s\"", value));
return (value);
}
}
value[0] = '\0';
DEBUG_puts("3httpGetSubField2: Returning NULL");
return (NULL);
}
/*
* 'httpGetVersion()' - Get the HTTP version at the other end.
*/
http_version_t /* O - Version number */
httpGetVersion(http_t *http) /* I - HTTP connection */
{
return (http ? http->version : HTTP_VERSION_1_0);
}
/*
* 'httpHead()' - Send a HEAD request to the server.
*/
int /* O - Status of call (0 = success) */
httpHead(http_t *http, /* I - HTTP connection */
const char *uri) /* I - URI for head */
{
DEBUG_printf(("httpHead(http=%p, uri=\"%s\")", (void *)http, uri));
return (http_send(http, HTTP_STATE_HEAD, uri));
}
/*
* 'httpInitialize()' - Initialize the HTTP interface library and set the
* default HTTP proxy (if any).
*/
void
httpInitialize(void)
{
static int initialized = 0; /* Have we been called before? */
#ifdef WIN32
WSADATA winsockdata; /* WinSock data */
#endif /* WIN32 */
_cupsGlobalLock();
if (initialized)
{
_cupsGlobalUnlock();
return;
}
#ifdef WIN32
WSAStartup(MAKEWORD(2,2), &winsockdata);
#elif !defined(SO_NOSIGPIPE)
/*
* Ignore SIGPIPE signals...
*/
# ifdef HAVE_SIGSET
sigset(SIGPIPE, SIG_IGN);
# elif defined(HAVE_SIGACTION)
struct sigaction action; /* POSIX sigaction data */
memset(&action, 0, sizeof(action));
action.sa_handler = SIG_IGN;
sigaction(SIGPIPE, &action, NULL);
# else
signal(SIGPIPE, SIG_IGN);
# endif /* !SO_NOSIGPIPE */
#endif /* WIN32 */
# ifdef HAVE_SSL
_httpTLSInitialize();
# endif /* HAVE_SSL */
initialized = 1;
_cupsGlobalUnlock();
}
/*
* 'httpIsChunked()' - Report whether a message body is chunked.
*
* This function returns non-zero if the message body is composed of
* variable-length chunks.
*
* @since CUPS 2.0/OS 10.10@
*/
int /* O - 1 if chunked, 0 if not */
httpIsChunked(http_t *http) /* I - HTTP connection */
{
return (http ? http->data_encoding == HTTP_ENCODING_CHUNKED : 0);
}
/*
* 'httpIsEncrypted()' - Report whether a connection is encrypted.
*
* This function returns non-zero if the connection is currently encrypted.
*
* @since CUPS 2.0/OS 10.10@
*/
int /* O - 1 if encrypted, 0 if not */
httpIsEncrypted(http_t *http) /* I - HTTP connection */
{
return (http ? http->tls != NULL : 0);
}
/*
* 'httpOptions()' - Send an OPTIONS request to the server.
*/
int /* O - Status of call (0 = success) */
httpOptions(http_t *http, /* I - HTTP connection */
const char *uri) /* I - URI for options */
{
return (http_send(http, HTTP_STATE_OPTIONS, uri));
}
/*
* 'httpPeek()' - Peek at data from a HTTP connection.
*
* This function copies available data from the given HTTP connection, reading
* a buffer as needed. The data is still available for reading using
* @link httpRead@ or @link httpRead2@.
*
* For non-blocking connections the usual timeouts apply.
*
* @since CUPS 1.7/macOS 10.9@
*/
ssize_t /* O - Number of bytes copied */
httpPeek(http_t *http, /* I - HTTP connection */
char *buffer, /* I - Buffer for data */
size_t length) /* I - Maximum number of bytes */
{
ssize_t bytes; /* Bytes read */
char len[32]; /* Length string */
DEBUG_printf(("httpPeek(http=%p, buffer=%p, length=" CUPS_LLFMT ")", (void *)http, (void *)buffer, CUPS_LLCAST length));
if (http == NULL || buffer == NULL)
return (-1);
http->activity = time(NULL);
http->error = 0;
if (length <= 0)
return (0);
if (http->data_encoding == HTTP_ENCODING_CHUNKED &&
http->data_remaining <= 0)
{
DEBUG_puts("2httpPeek: Getting chunk length...");
if (httpGets(len, sizeof(len), http) == NULL)
{
DEBUG_puts("1httpPeek: Could not get length!");
return (0);
}
if (!len[0])
{
DEBUG_puts("1httpPeek: Blank chunk length, trying again...");
if (!httpGets(len, sizeof(len), http))
{
DEBUG_puts("1httpPeek: Could not get chunk length.");
return (0);
}
}
http->data_remaining = strtoll(len, NULL, 16);
if (http->data_remaining < 0)
{
DEBUG_puts("1httpPeek: Negative chunk length!");
return (0);
}
}
DEBUG_printf(("2httpPeek: data_remaining=" CUPS_LLFMT,
CUPS_LLCAST http->data_remaining));
if (http->data_remaining <= 0 && http->data_encoding != HTTP_ENCODING_FIELDS)
{
/*
* A zero-length chunk ends a transfer; unless we are reading POST
* data, go idle...
*/
#ifdef HAVE_LIBZ
if (http->coding >= _HTTP_CODING_GUNZIP)
http_content_coding_finish(http);
#endif /* HAVE_LIBZ */
if (http->data_encoding == HTTP_ENCODING_CHUNKED)
httpGets(len, sizeof(len), http);
if (http->state == HTTP_STATE_POST_RECV)
http->state ++;
else
http->state = HTTP_STATE_STATUS;
DEBUG_printf(("1httpPeek: 0-length chunk, set state to %s.",
httpStateString(http->state)));
/*
* Prevent future reads for this request...
*/
http->data_encoding = HTTP_ENCODING_FIELDS;
return (0);
}
else if (length > (size_t)http->data_remaining)
length = (size_t)http->data_remaining;
#ifdef HAVE_LIBZ
if (http->used == 0 &&
(http->coding == _HTTP_CODING_IDENTITY ||
(http->coding >= _HTTP_CODING_GUNZIP && http->stream.avail_in == 0)))
#else
if (http->used == 0)
#endif /* HAVE_LIBZ */
{
/*
* Buffer small reads for better performance...
*/
ssize_t buflen; /* Length of read for buffer */
if (!http->blocking)
{
while (!httpWait(http, http->wait_value))
{
if (http->timeout_cb && (*http->timeout_cb)(http, http->timeout_data))
continue;
return (0);
}
}
if ((size_t)http->data_remaining > sizeof(http->buffer))
buflen = sizeof(http->buffer);
else
buflen = (ssize_t)http->data_remaining;
DEBUG_printf(("2httpPeek: Reading %d bytes into buffer.", (int)buflen));
bytes = http_read(http, http->buffer, (size_t)buflen);
DEBUG_printf(("2httpPeek: Read " CUPS_LLFMT " bytes into buffer.",
CUPS_LLCAST bytes));
if (bytes > 0)
{
#ifdef DEBUG
http_debug_hex("httpPeek", http->buffer, (int)bytes);
#endif /* DEBUG */
http->used = (int)bytes;
}
}
#ifdef HAVE_LIBZ
if (http->coding >= _HTTP_CODING_GUNZIP)
{
# ifdef HAVE_INFLATECOPY
int zerr; /* Decompressor error */
z_stream stream; /* Copy of decompressor stream */
if (http->used > 0 && http->stream.avail_in < HTTP_MAX_BUFFER)
{
size_t buflen = buflen = HTTP_MAX_BUFFER - http->stream.avail_in;
/* Number of bytes to copy */
if (http->stream.avail_in > 0 &&
http->stream.next_in > http->sbuffer)
memmove(http->sbuffer, http->stream.next_in, http->stream.avail_in);
http->stream.next_in = http->sbuffer;
if (buflen > (size_t)http->data_remaining)
buflen = (size_t)http->data_remaining;
if (buflen > (size_t)http->used)
buflen = (size_t)http->used;
DEBUG_printf(("1httpPeek: Copying %d more bytes of data into "
"decompression buffer.", (int)buflen));
memcpy(http->sbuffer + http->stream.avail_in, http->buffer, buflen);
http->stream.avail_in += buflen;
http->used -= (int)buflen;
http->data_remaining -= (off_t)buflen;
if (http->used > 0)
memmove(http->buffer, http->buffer + buflen, (size_t)http->used);
}
DEBUG_printf(("2httpPeek: length=%d, avail_in=%d", (int)length,
(int)http->stream.avail_in));
if (inflateCopy(&stream, &(http->stream)) != Z_OK)
{
DEBUG_puts("2httpPeek: Unable to copy decompressor stream.");
http->error = ENOMEM;
return (-1);
}
stream.next_out = (Bytef *)buffer;
stream.avail_out = (uInt)length;
zerr = inflate(&stream, Z_SYNC_FLUSH);
inflateEnd(&stream);
if (zerr < Z_OK)
{
DEBUG_printf(("2httpPeek: zerr=%d", zerr));
#ifdef DEBUG
http_debug_hex("2httpPeek", (char *)http->sbuffer, (int)http->stream.avail_in);
#endif /* DEBUG */
http->error = EIO;
return (-1);
}
bytes = (ssize_t)(length - http->stream.avail_out);
# else
DEBUG_puts("2httpPeek: No inflateCopy on this platform, httpPeek does not "
"work with compressed streams.");
return (-1);
# endif /* HAVE_INFLATECOPY */
}
else
#endif /* HAVE_LIBZ */
if (http->used > 0)
{
if (length > (size_t)http->used)
length = (size_t)http->used;
bytes = (ssize_t)length;
DEBUG_printf(("2httpPeek: grabbing %d bytes from input buffer...",
(int)bytes));
memcpy(buffer, http->buffer, length);
}
else
bytes = 0;
if (bytes < 0)
{
#ifdef WIN32
if (WSAGetLastError() == WSAEINTR || WSAGetLastError() == WSAEWOULDBLOCK)
bytes = 0;
else
http->error = WSAGetLastError();
#else
if (errno == EINTR || errno == EAGAIN)
bytes = 0;
else
http->error = errno;
#endif /* WIN32 */
}
else if (bytes == 0)
{
http->error = EPIPE;
return (0);
}
return (bytes);
}
/*
* 'httpPost()' - Send a POST request to the server.
*/
int /* O - Status of call (0 = success) */
httpPost(http_t *http, /* I - HTTP connection */
const char *uri) /* I - URI for post */
{
return (http_send(http, HTTP_STATE_POST, uri));
}
/*
* 'httpPrintf()' - Print a formatted string to a HTTP connection.
*
* @private@
*/
int /* O - Number of bytes written */
httpPrintf(http_t *http, /* I - HTTP connection */
const char *format, /* I - printf-style format string */
...) /* I - Additional args as needed */
{
ssize_t bytes; /* Number of bytes to write */
char buf[16384]; /* Buffer for formatted string */
va_list ap; /* Variable argument pointer */
DEBUG_printf(("2httpPrintf(http=%p, format=\"%s\", ...)", (void *)http, format));
va_start(ap, format);
bytes = vsnprintf(buf, sizeof(buf), format, ap);
va_end(ap);
DEBUG_printf(("3httpPrintf: (" CUPS_LLFMT " bytes) %s", CUPS_LLCAST bytes, buf));
if (http->data_encoding == HTTP_ENCODING_FIELDS)
return ((int)httpWrite2(http, buf, (size_t)bytes));
else
{
if (http->wused)
{
DEBUG_puts("4httpPrintf: flushing existing data...");
if (httpFlushWrite(http) < 0)
return (-1);
}
return ((int)http_write(http, buf, (size_t)bytes));
}
}
/*
* 'httpPut()' - Send a PUT request to the server.
*/
int /* O - Status of call (0 = success) */
httpPut(http_t *http, /* I - HTTP connection */
const char *uri) /* I - URI to put */
{
DEBUG_printf(("httpPut(http=%p, uri=\"%s\")", (void *)http, uri));
return (http_send(http, HTTP_STATE_PUT, uri));
}
/*
* 'httpRead()' - Read data from a HTTP connection.
*
* This function is deprecated. Use the httpRead2() function which can
* read more than 2GB of data.
*
* @deprecated@
*/
int /* O - Number of bytes read */
httpRead(http_t *http, /* I - HTTP connection */
char *buffer, /* I - Buffer for data */
int length) /* I - Maximum number of bytes */
{
return ((int)httpRead2(http, buffer, (size_t)length));
}
/*
* 'httpRead2()' - Read data from a HTTP connection.
*
* @since CUPS 1.2/macOS 10.5@
*/
ssize_t /* O - Number of bytes read */
httpRead2(http_t *http, /* I - HTTP connection */
char *buffer, /* I - Buffer for data */
size_t length) /* I - Maximum number of bytes */
{
ssize_t bytes; /* Bytes read */
#ifdef HAVE_LIBZ
DEBUG_printf(("httpRead2(http=%p, buffer=%p, length=" CUPS_LLFMT ") coding=%d data_encoding=%d data_remaining=" CUPS_LLFMT, (void *)http, (void *)buffer, CUPS_LLCAST length, http->coding, http->data_encoding, CUPS_LLCAST http->data_remaining));
#else
DEBUG_printf(("httpRead2(http=%p, buffer=%p, length=" CUPS_LLFMT ") data_encoding=%d data_remaining=" CUPS_LLFMT, (void *)http, (void *)buffer, CUPS_LLCAST length, http->data_encoding, CUPS_LLCAST http->data_remaining));
#endif /* HAVE_LIBZ */
if (http == NULL || buffer == NULL)
return (-1);
http->activity = time(NULL);
http->error = 0;
if (length <= 0)
return (0);
#ifdef HAVE_LIBZ
if (http->coding >= _HTTP_CODING_GUNZIP)
{
do
{
if (http->stream.avail_in > 0)
{
int zerr; /* Decompressor error */
DEBUG_printf(("2httpRead2: avail_in=%d, avail_out=%d",
(int)http->stream.avail_in, (int)length));
http->stream.next_out = (Bytef *)buffer;
http->stream.avail_out = (uInt)length;
if ((zerr = inflate(&(http->stream), Z_SYNC_FLUSH)) < Z_OK)
{
DEBUG_printf(("2httpRead2: zerr=%d", zerr));
#ifdef DEBUG
http_debug_hex("2httpRead2", (char *)http->sbuffer, (int)http->stream.avail_in);
#endif /* DEBUG */
http->error = EIO;
return (-1);
}
bytes = (ssize_t)(length - http->stream.avail_out);
DEBUG_printf(("2httpRead2: avail_in=%d, avail_out=%d, bytes=%d",
http->stream.avail_in, http->stream.avail_out,
(int)bytes));
}
else
bytes = 0;
if (bytes == 0)
{
ssize_t buflen = HTTP_MAX_BUFFER - (ssize_t)http->stream.avail_in;
/* Additional bytes for buffer */
if (buflen > 0)
{
if (http->stream.avail_in > 0 &&
http->stream.next_in > http->sbuffer)
memmove(http->sbuffer, http->stream.next_in, http->stream.avail_in);
http->stream.next_in = http->sbuffer;
DEBUG_printf(("1httpRead2: Reading up to %d more bytes of data into "
"decompression buffer.", (int)buflen));
if (http->data_remaining > 0)
{
if (buflen > http->data_remaining)
buflen = (ssize_t)http->data_remaining;
bytes = http_read_buffered(http, (char *)http->sbuffer + http->stream.avail_in, (size_t)buflen);
}
else if (http->data_encoding == HTTP_ENCODING_CHUNKED)
bytes = http_read_chunk(http, (char *)http->sbuffer + http->stream.avail_in, (size_t)buflen);
else
bytes = 0;
if (bytes < 0)
return (bytes);
else if (bytes == 0)
break;
DEBUG_printf(("1httpRead2: Adding " CUPS_LLFMT " bytes to "
"decompression buffer.", CUPS_LLCAST bytes));
http->data_remaining -= bytes;
http->stream.avail_in += (uInt)bytes;
if (http->data_remaining <= 0 &&
http->data_encoding == HTTP_ENCODING_CHUNKED)
{
/*
* Read the trailing blank line now...
*/
char len[32]; /* Length string */
httpGets(len, sizeof(len), http);
}
bytes = 0;
}
else
return (0);
}
}
while (bytes == 0);
}
else
#endif /* HAVE_LIBZ */
if (http->data_remaining == 0 && http->data_encoding == HTTP_ENCODING_CHUNKED)
{
if ((bytes = http_read_chunk(http, buffer, length)) > 0)
{
http->data_remaining -= bytes;
if (http->data_remaining <= 0)
{
/*
* Read the trailing blank line now...
*/
char len[32]; /* Length string */
httpGets(len, sizeof(len), http);
}
}
}
else if (http->data_remaining <= 0)
{
/*
* No more data to read...
*/
return (0);
}
else
{
DEBUG_printf(("1httpRead2: Reading up to %d bytes into buffer.",
(int)length));
if (length > (size_t)http->data_remaining)
length = (size_t)http->data_remaining;
if ((bytes = http_read_buffered(http, buffer, length)) > 0)
{
http->data_remaining -= bytes;
if (http->data_remaining <= 0 &&
http->data_encoding == HTTP_ENCODING_CHUNKED)
{
/*
* Read the trailing blank line now...
*/
char len[32]; /* Length string */
httpGets(len, sizeof(len), http);
}
}
}
if (
#ifdef HAVE_LIBZ
(http->coding == _HTTP_CODING_IDENTITY ||
(http->coding >= _HTTP_CODING_GUNZIP && http->stream.avail_in == 0)) &&
#endif /* HAVE_LIBZ */
((http->data_remaining <= 0 &&
http->data_encoding == HTTP_ENCODING_LENGTH) ||
(http->data_encoding == HTTP_ENCODING_CHUNKED && bytes == 0)))
{
#ifdef HAVE_LIBZ
if (http->coding >= _HTTP_CODING_GUNZIP)
http_content_coding_finish(http);
#endif /* HAVE_LIBZ */
if (http->state == HTTP_STATE_POST_RECV)
http->state ++;
else if (http->state == HTTP_STATE_GET_SEND ||
http->state == HTTP_STATE_POST_SEND)
http->state = HTTP_STATE_WAITING;
else
http->state = HTTP_STATE_STATUS;
DEBUG_printf(("1httpRead2: End of content, set state to %s.",
httpStateString(http->state)));
}
return (bytes);
}
/*
* 'httpReadRequest()' - Read a HTTP request from a connection.
*
* @since CUPS 1.7/macOS 10.9@
*/
http_state_t /* O - New state of connection */
httpReadRequest(http_t *http, /* I - HTTP connection */
char *uri, /* I - URI buffer */
size_t urilen) /* I - Size of URI buffer */
{
char line[4096], /* HTTP request line */
*req_method, /* HTTP request method */
*req_uri, /* HTTP request URI */
*req_version; /* HTTP request version number string */
/*
* Range check input...
*/
DEBUG_printf(("httpReadRequest(http=%p, uri=%p, urilen=" CUPS_LLFMT ")", (void *)http, (void *)uri, CUPS_LLCAST urilen));
if (uri)
*uri = '\0';
if (!http || !uri || urilen < 1)
{
DEBUG_puts("1httpReadRequest: Bad arguments, returning HTTP_STATE_ERROR.");
return (HTTP_STATE_ERROR);
}
else if (http->state != HTTP_STATE_WAITING)
{
DEBUG_printf(("1httpReadRequest: Bad state %s, returning HTTP_STATE_ERROR.",
httpStateString(http->state)));
return (HTTP_STATE_ERROR);
}
/*
* Reset state...
*/
httpClearFields(http);
http->activity = time(NULL);
http->data_encoding = HTTP_ENCODING_FIELDS;
http->data_remaining = 0;
http->keep_alive = HTTP_KEEPALIVE_OFF;
http->status = HTTP_STATUS_OK;
http->version = HTTP_VERSION_1_1;
/*
* Read a line from the socket...
*/
if (!httpGets(line, sizeof(line), http))
{
DEBUG_puts("1httpReadRequest: Unable to read, returning HTTP_STATE_ERROR");
return (HTTP_STATE_ERROR);
}
if (!line[0])
{
DEBUG_puts("1httpReadRequest: Blank line, returning HTTP_STATE_WAITING");
return (HTTP_STATE_WAITING);
}
DEBUG_printf(("1httpReadRequest: %s", line));
/*
* Parse it...
*/
req_method = line;
req_uri = line;
while (*req_uri && !isspace(*req_uri & 255))
req_uri ++;
if (!*req_uri)
{
DEBUG_puts("1httpReadRequest: No request URI.");
_cupsSetError(IPP_STATUS_ERROR_INTERNAL, _("No request URI."), 1);
return (HTTP_STATE_ERROR);
}
*req_uri++ = '\0';
while (*req_uri && isspace(*req_uri & 255))
req_uri ++;
req_version = req_uri;
while (*req_version && !isspace(*req_version & 255))
req_version ++;
if (!*req_version)
{
DEBUG_puts("1httpReadRequest: No request protocol version.");
_cupsSetError(IPP_STATUS_ERROR_INTERNAL, _("No request protocol version."), 1);
return (HTTP_STATE_ERROR);
}
*req_version++ = '\0';
while (*req_version && isspace(*req_version & 255))
req_version ++;
/*
* Validate...
*/
if (!strcmp(req_method, "OPTIONS"))
http->state = HTTP_STATE_OPTIONS;
else if (!strcmp(req_method, "GET"))
http->state = HTTP_STATE_GET;
else if (!strcmp(req_method, "HEAD"))
http->state = HTTP_STATE_HEAD;
else if (!strcmp(req_method, "POST"))
http->state = HTTP_STATE_POST;
else if (!strcmp(req_method, "PUT"))
http->state = HTTP_STATE_PUT;
else if (!strcmp(req_method, "DELETE"))
http->state = HTTP_STATE_DELETE;
else if (!strcmp(req_method, "TRACE"))
http->state = HTTP_STATE_TRACE;
else if (!strcmp(req_method, "CONNECT"))
http->state = HTTP_STATE_CONNECT;
else
{
DEBUG_printf(("1httpReadRequest: Unknown method \"%s\".", req_method));
_cupsSetError(IPP_STATUS_ERROR_INTERNAL, _("Unknown request method."), 1);
return (HTTP_STATE_UNKNOWN_METHOD);
}
DEBUG_printf(("1httpReadRequest: Set state to %s.",
httpStateString(http->state)));
if (!strcmp(req_version, "HTTP/1.0"))
{
http->version = HTTP_VERSION_1_0;
http->keep_alive = HTTP_KEEPALIVE_OFF;
}
else if (!strcmp(req_version, "HTTP/1.1"))
{
http->version = HTTP_VERSION_1_1;
http->keep_alive = HTTP_KEEPALIVE_ON;
}
else
{
DEBUG_printf(("1httpReadRequest: Unknown version \"%s\".", req_version));
_cupsSetError(IPP_STATUS_ERROR_INTERNAL, _("Unknown request version."), 1);
return (HTTP_STATE_UNKNOWN_VERSION);
}
DEBUG_printf(("1httpReadRequest: URI is \"%s\".", req_uri));
strlcpy(uri, req_uri, urilen);
return (http->state);
}
/*
* 'httpReconnect()' - Reconnect to a HTTP server.
*
* This function is deprecated. Please use the @link httpReconnect2@ function
* instead.
*
* @deprecated@
*/
int /* O - 0 on success, non-zero on failure */
httpReconnect(http_t *http) /* I - HTTP connection */
{
DEBUG_printf(("httpReconnect(http=%p)", (void *)http));
return (httpReconnect2(http, 30000, NULL));
}
/*
* 'httpReconnect2()' - Reconnect to a HTTP server with timeout and optional
* cancel.
*/
int /* O - 0 on success, non-zero on failure */
httpReconnect2(http_t *http, /* I - HTTP connection */
int msec, /* I - Timeout in milliseconds */
int *cancel) /* I - Pointer to "cancel" variable */
{
http_addrlist_t *addr; /* Connected address */
#ifdef DEBUG
http_addrlist_t *current; /* Current address */
char temp[256]; /* Temporary address string */
#endif /* DEBUG */
DEBUG_printf(("httpReconnect2(http=%p, msec=%d, cancel=%p)", (void *)http, msec, (void *)cancel));
if (!http)
{
_cupsSetError(IPP_STATUS_ERROR_INTERNAL, strerror(EINVAL), 0);
return (-1);
}
#ifdef HAVE_SSL
if (http->tls)
{
DEBUG_puts("2httpReconnect2: Shutting down SSL/TLS...");
_httpTLSStop(http);
}
#endif /* HAVE_SSL */
/*
* Close any previously open socket...
*/
if (http->fd >= 0)
{
DEBUG_printf(("2httpReconnect2: Closing socket %d...", http->fd));
httpAddrClose(NULL, http->fd);
http->fd = -1;
}
/*
* Reset all state (except fields, which may be reused)...
*/
http->state = HTTP_STATE_WAITING;
http->version = HTTP_VERSION_1_1;
http->keep_alive = HTTP_KEEPALIVE_OFF;
memset(&http->_hostaddr, 0, sizeof(http->_hostaddr));
http->data_encoding = HTTP_ENCODING_FIELDS;
http->_data_remaining = 0;
http->used = 0;
http->data_remaining = 0;
http->hostaddr = NULL;
http->wused = 0;
/*
* Connect to the server...
*/
#ifdef DEBUG
for (current = http->addrlist; current; current = current->next)
DEBUG_printf(("2httpReconnect2: Address %s:%d",
httpAddrString(&(current->addr), temp, sizeof(temp)),
httpAddrPort(&(current->addr))));
#endif /* DEBUG */
if ((addr = httpAddrConnect2(http->addrlist, &(http->fd), msec, cancel)) == NULL)
{
/*
* Unable to connect...
*/
#ifdef WIN32
http->error = WSAGetLastError();
#else
http->error = errno;
#endif /* WIN32 */
http->status = HTTP_STATUS_ERROR;
DEBUG_printf(("1httpReconnect2: httpAddrConnect failed: %s",
strerror(http->error)));
return (-1);
}
DEBUG_printf(("2httpReconnect2: New socket=%d", http->fd));
if (http->timeout_value > 0)
http_set_timeout(http->fd, http->timeout_value);
http->hostaddr = &(addr->addr);
http->error = 0;
#ifdef HAVE_SSL
if (http->encryption == HTTP_ENCRYPTION_ALWAYS)
{
/*
* Always do encryption via SSL.
*/
if (_httpTLSStart(http) != 0)
{
httpAddrClose(NULL, http->fd);
return (-1);
}
}
else if (http->encryption == HTTP_ENCRYPTION_REQUIRED && !http->tls_upgrade)
return (http_tls_upgrade(http));
#endif /* HAVE_SSL */
DEBUG_printf(("1httpReconnect2: Connected to %s:%d...",
httpAddrString(http->hostaddr, temp, sizeof(temp)),
httpAddrPort(http->hostaddr)));
return (0);
}
/*
* 'httpSetAuthString()' - Set the current authorization string.
*
* This function just stores a copy of the current authorization string in
* the HTTP connection object. You must still call httpSetField() to set
* HTTP_FIELD_AUTHORIZATION prior to issuing a HTTP request using httpGet(),
* httpHead(), httpOptions(), httpPost, or httpPut().
*
* @since CUPS 1.3/macOS 10.5@
*/
void
httpSetAuthString(http_t *http, /* I - HTTP connection */
const char *scheme, /* I - Auth scheme (NULL to clear it) */
const char *data) /* I - Auth data (NULL for none) */
{
/*
* Range check input...
*/
if (!http)
return;
if (http->authstring && http->authstring != http->_authstring)
free(http->authstring);
http->authstring = http->_authstring;
if (scheme)
{
/*
* Set the current authorization string...
*/
size_t len = strlen(scheme) + (data ? strlen(data) + 1 : 0) + 1;
char *temp;
if (len > sizeof(http->_authstring))
{
if ((temp = malloc(len)) == NULL)
len = sizeof(http->_authstring);
else
http->authstring = temp;
}
if (data)
snprintf(http->authstring, len, "%s %s", scheme, data);
else
strlcpy(http->authstring, scheme, len);
}
else
{
/*
* Clear the current authorization string...
*/
http->_authstring[0] = '\0';
}
}
/*
* 'httpSetCredentials()' - Set the credentials associated with an encrypted
* connection.
*
* @since CUPS 1.5/macOS 10.7@
*/
int /* O - Status of call (0 = success) */
httpSetCredentials(http_t *http, /* I - HTTP connection */
cups_array_t *credentials) /* I - Array of credentials */
{
if (!http || cupsArrayCount(credentials) < 1)
return (-1);
#ifdef HAVE_SSL
_httpFreeCredentials(http->tls_credentials);
http->tls_credentials = _httpCreateCredentials(credentials);
#endif /* HAVE_SSL */
return (http->tls_credentials ? 0 : -1);
}
/*
* 'httpSetCookie()' - Set the cookie value(s).
*
* @since CUPS 1.1.19/macOS 10.3@
*/
void
httpSetCookie(http_t *http, /* I - Connection */
const char *cookie) /* I - Cookie string */
{
if (!http)
return;
if (http->cookie)
free(http->cookie);
if (cookie)
http->cookie = strdup(cookie);
else
http->cookie = NULL;
}
/*
* 'httpSetDefaultField()' - Set the default value of an HTTP header.
*
* Currently only @code HTTP_FIELD_ACCEPT_ENCODING@, @code HTTP_FIELD_SERVER@,
* and @code HTTP_FIELD_USER_AGENT@ can be set.
*
* @since CUPS 1.7/macOS 10.9@
*/
void
httpSetDefaultField(http_t *http, /* I - HTTP connection */
http_field_t field, /* I - Field index */
const char *value)/* I - Value */
{
DEBUG_printf(("httpSetDefaultField(http=%p, field=%d(%s), value=\"%s\")", (void *)http, field, http_fields[field], value));
if (!http)
return;
switch (field)
{
case HTTP_FIELD_ACCEPT_ENCODING :
if (http->default_accept_encoding)
_cupsStrFree(http->default_accept_encoding);
http->default_accept_encoding = value ? _cupsStrAlloc(value) : NULL;
break;
case HTTP_FIELD_SERVER :
if (http->default_server)
_cupsStrFree(http->default_server);
http->default_server = value ? _cupsStrAlloc(value) : NULL;
break;
case HTTP_FIELD_USER_AGENT :
if (http->default_user_agent)
_cupsStrFree(http->default_user_agent);
http->default_user_agent = value ? _cupsStrAlloc(value) : NULL;
break;
default :
DEBUG_puts("1httpSetDefaultField: Ignored.");
break;
}
}
/*
* 'httpSetExpect()' - Set the Expect: header in a request.
*
* Currently only @code HTTP_STATUS_CONTINUE@ is supported for the "expect"
* argument.
*
* @since CUPS 1.2/macOS 10.5@
*/
void
httpSetExpect(http_t *http, /* I - HTTP connection */
http_status_t expect) /* I - HTTP status to expect
(@code HTTP_STATUS_CONTINUE@) */
{
DEBUG_printf(("httpSetExpect(http=%p, expect=%d)", (void *)http, expect));
if (http)
http->expect = expect;
}
/*
* 'httpSetField()' - Set the value of an HTTP header.
*/
void
httpSetField(http_t *http, /* I - HTTP connection */
http_field_t field, /* I - Field index */
const char *value) /* I - Value */
{
DEBUG_printf(("httpSetField(http=%p, field=%d(%s), value=\"%s\")", (void *)http, field, http_fields[field], value));
if (http == NULL ||
field < HTTP_FIELD_ACCEPT_LANGUAGE ||
field >= HTTP_FIELD_MAX ||
value == NULL)
return;
switch (field)
{
case HTTP_FIELD_ACCEPT_ENCODING :
if (http->accept_encoding)
_cupsStrFree(http->accept_encoding);
http->accept_encoding = _cupsStrAlloc(value);
break;
case HTTP_FIELD_ALLOW :
if (http->allow)
_cupsStrFree(http->allow);
http->allow = _cupsStrAlloc(value);
break;
case HTTP_FIELD_SERVER :
if (http->server)
_cupsStrFree(http->server);
http->server = _cupsStrAlloc(value);
break;
case HTTP_FIELD_WWW_AUTHENTICATE :
/* CUPS STR #4503 - don't override WWW-Authenticate for unknown auth schemes */
if (http->fields[HTTP_FIELD_WWW_AUTHENTICATE][0] &&
_cups_strncasecmp(value, "Basic ", 6) &&
_cups_strncasecmp(value, "Digest ", 7) &&
_cups_strncasecmp(value, "Negotiate ", 10))
{
DEBUG_printf(("1httpSetField: Ignoring unknown auth scheme in \"%s\".", value));
return;
}
/* Fall through to copy */
default :
strlcpy(http->fields[field], value, HTTP_MAX_VALUE);
break;
}
if (field == HTTP_FIELD_AUTHORIZATION)
{
/*
* Special case for Authorization: as its contents can be
* longer than HTTP_MAX_VALUE
*/
if (http->field_authorization)
free(http->field_authorization);
http->field_authorization = strdup(value);
}
else if (field == HTTP_FIELD_HOST)
{
/*
* Special-case for Host: as we don't want a trailing "." on the hostname and
* need to bracket IPv6 numeric addresses.
*/
char *ptr = strchr(value, ':');
if (value[0] != '[' && ptr && strchr(ptr + 1, ':'))
{
/*
* Bracket IPv6 numeric addresses...
*
* This is slightly inefficient (basically copying twice), but is an edge
* case and not worth optimizing...
*/
snprintf(http->fields[HTTP_FIELD_HOST],
sizeof(http->fields[HTTP_FIELD_HOST]), "[%s]", value);
}
else
{
/*
* Check for a trailing dot on the hostname...
*/
ptr = http->fields[HTTP_FIELD_HOST];
if (*ptr)
{
ptr += strlen(ptr) - 1;
if (*ptr == '.')
*ptr = '\0';
}
}
}
#ifdef HAVE_LIBZ
else if (field == HTTP_FIELD_CONTENT_ENCODING &&
http->data_encoding != HTTP_ENCODING_FIELDS)
{
DEBUG_puts("1httpSetField: Calling http_content_coding_start.");
http_content_coding_start(http, value);
}
#endif /* HAVE_LIBZ */
}
/*
* 'httpSetKeepAlive()' - Set the current Keep-Alive state of a connection.
*
* @since CUPS 2.0/OS 10.10@
*/
void
httpSetKeepAlive(
http_t *http, /* I - HTTP connection */
http_keepalive_t keep_alive) /* I - New Keep-Alive value */
{
if (http)
http->keep_alive = keep_alive;
}
/*
* 'httpSetLength()' - Set the content-length and content-encoding.
*
* @since CUPS 1.2/macOS 10.5@
*/
void
httpSetLength(http_t *http, /* I - HTTP connection */
size_t length) /* I - Length (0 for chunked) */
{
DEBUG_printf(("httpSetLength(http=%p, length=" CUPS_LLFMT ")", (void *)http, CUPS_LLCAST length));
if (!http)
return;
if (!length)
{
strlcpy(http->fields[HTTP_FIELD_TRANSFER_ENCODING], "chunked",
HTTP_MAX_VALUE);
http->fields[HTTP_FIELD_CONTENT_LENGTH][0] = '\0';
}
else
{
http->fields[HTTP_FIELD_TRANSFER_ENCODING][0] = '\0';
snprintf(http->fields[HTTP_FIELD_CONTENT_LENGTH], HTTP_MAX_VALUE,
CUPS_LLFMT, CUPS_LLCAST length);
}
}
/*
* 'httpSetTimeout()' - Set read/write timeouts and an optional callback.
*
* The optional timeout callback receives both the HTTP connection and a user
* data pointer and must return 1 to continue or 0 to error (time) out.
*
* @since CUPS 1.5/macOS 10.7@
*/
void
httpSetTimeout(
http_t *http, /* I - HTTP connection */
double timeout, /* I - Number of seconds for timeout,
must be greater than 0 */
http_timeout_cb_t cb, /* I - Callback function or NULL */
void *user_data) /* I - User data pointer */
{
if (!http || timeout <= 0.0)
return;
http->timeout_cb = cb;
http->timeout_data = user_data;
http->timeout_value = timeout;
if (http->fd >= 0)
http_set_timeout(http->fd, timeout);
http_set_wait(http);
}
/*
* 'httpShutdown()' - Shutdown one side of an HTTP connection.
*
* @since CUPS 2.0/OS 10.10@
*/
void
httpShutdown(http_t *http) /* I - HTTP connection */
{
if (!http || http->fd < 0)
return;
#ifdef HAVE_SSL
if (http->tls)
_httpTLSStop(http);
#endif /* HAVE_SSL */
#ifdef WIN32
shutdown(http->fd, SD_RECEIVE); /* Microsoft-ism... */
#else
shutdown(http->fd, SHUT_RD);
#endif /* WIN32 */
}
/*
* 'httpTrace()' - Send an TRACE request to the server.
*/
int /* O - Status of call (0 = success) */
httpTrace(http_t *http, /* I - HTTP connection */
const char *uri) /* I - URI for trace */
{
return (http_send(http, HTTP_STATE_TRACE, uri));
}
/*
* '_httpUpdate()' - Update the current HTTP status for incoming data.
*
* Note: Unlike httpUpdate(), this function does not flush pending write data
* and only retrieves a single status line from the HTTP connection.
*/
int /* O - 1 to continue, 0 to stop */
_httpUpdate(http_t *http, /* I - HTTP connection */
http_status_t *status) /* O - Current HTTP status */
{
char line[32768], /* Line from connection... */
*value; /* Pointer to value on line */
http_field_t field; /* Field index */
int major, minor; /* HTTP version numbers */
DEBUG_printf(("_httpUpdate(http=%p, status=%p), state=%s", (void *)http, (void *)status, httpStateString(http->state)));
/*
* Grab a single line from the connection...
*/
if (!httpGets(line, sizeof(line), http))
{
*status = HTTP_STATUS_ERROR;
return (0);
}
DEBUG_printf(("2_httpUpdate: Got \"%s\"", line));
if (line[0] == '\0')
{
/*
* Blank line means the start of the data section (if any). Return
* the result code, too...
*
* If we get status 100 (HTTP_STATUS_CONTINUE), then we *don't* change
* states. Instead, we just return HTTP_STATUS_CONTINUE to the caller and
* keep on tryin'...
*/
if (http->status == HTTP_STATUS_CONTINUE)
{
*status = http->status;
return (0);
}
if (http->status < HTTP_STATUS_BAD_REQUEST)
http->digest_tries = 0;
#ifdef HAVE_SSL
if (http->status == HTTP_STATUS_SWITCHING_PROTOCOLS && !http->tls)
{
if (_httpTLSStart(http) != 0)
{
httpAddrClose(NULL, http->fd);
*status = http->status = HTTP_STATUS_ERROR;
return (0);
}
*status = HTTP_STATUS_CONTINUE;
return (0);
}
#endif /* HAVE_SSL */
if (http_set_length(http) < 0)
{
DEBUG_puts("1_httpUpdate: Bad Content-Length.");
http->error = EINVAL;
http->status = *status = HTTP_STATUS_ERROR;
return (0);
}
switch (http->state)
{
case HTTP_STATE_GET :
case HTTP_STATE_POST :
case HTTP_STATE_POST_RECV :
case HTTP_STATE_PUT :
http->state ++;
DEBUG_printf(("1_httpUpdate: Set state to %s.",
httpStateString(http->state)));
case HTTP_STATE_POST_SEND :
case HTTP_STATE_HEAD :
break;
default :
http->state = HTTP_STATE_WAITING;
DEBUG_puts("1_httpUpdate: Reset state to HTTP_STATE_WAITING.");
break;
}
#ifdef HAVE_LIBZ
DEBUG_puts("1_httpUpdate: Calling http_content_coding_start.");
http_content_coding_start(http,
httpGetField(http, HTTP_FIELD_CONTENT_ENCODING));
#endif /* HAVE_LIBZ */
*status = http->status;
return (0);
}
else if (!strncmp(line, "HTTP/", 5) && http->mode == _HTTP_MODE_CLIENT)
{
/*
* Got the beginning of a response...
*/
int intstatus; /* Status value as an integer */
if (sscanf(line, "HTTP/%d.%d%d", &major, &minor, &intstatus) != 3)
{
*status = http->status = HTTP_STATUS_ERROR;
return (0);
}
httpClearFields(http);
http->version = (http_version_t)(major * 100 + minor);
*status = http->status = (http_status_t)intstatus;
}
else if ((value = strchr(line, ':')) != NULL)
{
/*
* Got a value...
*/
*value++ = '\0';
while (_cups_isspace(*value))
value ++;
DEBUG_printf(("1_httpUpdate: Header %s: %s", line, value));
/*
* Be tolerants of servers that send unknown attribute fields...
*/
if (!_cups_strcasecmp(line, "expect"))
{
/*
* "Expect: 100-continue" or similar...
*/
http->expect = (http_status_t)atoi(value);
}
else if (!_cups_strcasecmp(line, "cookie"))
{
/*
* "Cookie: name=value[; name=value ...]" - replaces previous cookies...
*/
httpSetCookie(http, value);
}
else if ((field = httpFieldValue(line)) != HTTP_FIELD_UNKNOWN)
httpSetField(http, field, value);
#ifdef DEBUG
else
DEBUG_printf(("1_httpUpdate: unknown field %s seen!", line));
#endif /* DEBUG */
}
else
{
DEBUG_printf(("1_httpUpdate: Bad response line \"%s\"!", line));
http->error = EINVAL;
http->status = *status = HTTP_STATUS_ERROR;
return (0);
}
return (1);
}
/*
* 'httpUpdate()' - Update the current HTTP state for incoming data.
*/
http_status_t /* O - HTTP status */
httpUpdate(http_t *http) /* I - HTTP connection */
{
http_status_t status; /* Request status */
DEBUG_printf(("httpUpdate(http=%p), state=%s", (void *)http, httpStateString(http->state)));
/*
* Flush pending data, if any...
*/
if (http->wused)
{
DEBUG_puts("2httpUpdate: flushing buffer...");
if (httpFlushWrite(http) < 0)
return (HTTP_STATUS_ERROR);
}
/*
* If we haven't issued any commands, then there is nothing to "update"...
*/
if (http->state == HTTP_STATE_WAITING)
return (HTTP_STATUS_CONTINUE);
/*
* Grab all of the lines we can from the connection...
*/
while (_httpUpdate(http, &status));
/*
* See if there was an error...
*/
if (http->error == EPIPE && http->status > HTTP_STATUS_CONTINUE)
{
DEBUG_printf(("1httpUpdate: Returning status %d...", http->status));
return (http->status);
}
if (http->error)
{
DEBUG_printf(("1httpUpdate: socket error %d - %s", http->error,
strerror(http->error)));
http->status = HTTP_STATUS_ERROR;
return (HTTP_STATUS_ERROR);
}
/*
* Return the current status...
*/
return (status);
}
/*
* '_httpWait()' - Wait for data available on a connection (no flush).
*/
int /* O - 1 if data is available, 0 otherwise */
_httpWait(http_t *http, /* I - HTTP connection */
int msec, /* I - Milliseconds to wait */
int usessl) /* I - Use SSL context? */
{
#ifdef HAVE_POLL
struct pollfd pfd; /* Polled file descriptor */
#else
fd_set input_set; /* select() input set */
struct timeval timeout; /* Timeout */
#endif /* HAVE_POLL */
int nfds; /* Result from select()/poll() */
DEBUG_printf(("4_httpWait(http=%p, msec=%d, usessl=%d)", (void *)http, msec, usessl));
if (http->fd < 0)
{
DEBUG_printf(("5_httpWait: Returning 0 since fd=%d", http->fd));
return (0);
}
/*
* Check the SSL/TLS buffers for data first...
*/
#ifdef HAVE_SSL
if (http->tls && _httpTLSPending(http))
{
DEBUG_puts("5_httpWait: Return 1 since there is pending TLS data.");
return (1);
}
#endif /* HAVE_SSL */
/*
* Then try doing a select() or poll() to poll the socket...
*/
#ifdef HAVE_POLL
pfd.fd = http->fd;
pfd.events = POLLIN;
do
{
nfds = poll(&pfd, 1, msec);
}
while (nfds < 0 && (errno == EINTR || errno == EAGAIN));
#else
do
{
FD_ZERO(&input_set);
FD_SET(http->fd, &input_set);
DEBUG_printf(("6_httpWait: msec=%d, http->fd=%d", msec, http->fd));
if (msec >= 0)
{
timeout.tv_sec = msec / 1000;
timeout.tv_usec = (msec % 1000) * 1000;
nfds = select(http->fd + 1, &input_set, NULL, NULL, &timeout);
}
else
nfds = select(http->fd + 1, &input_set, NULL, NULL, NULL);
DEBUG_printf(("6_httpWait: select() returned %d...", nfds));
}
# ifdef WIN32
while (nfds < 0 && (WSAGetLastError() == WSAEINTR ||
WSAGetLastError() == WSAEWOULDBLOCK));
# else
while (nfds < 0 && (errno == EINTR || errno == EAGAIN));
# endif /* WIN32 */
#endif /* HAVE_POLL */
DEBUG_printf(("5_httpWait: returning with nfds=%d, errno=%d...", nfds,
errno));
return (nfds > 0);
}
/*
* 'httpWait()' - Wait for data available on a connection.
*
* @since CUPS 1.1.19/macOS 10.3@
*/
int /* O - 1 if data is available, 0 otherwise */
httpWait(http_t *http, /* I - HTTP connection */
int msec) /* I - Milliseconds to wait */
{
/*
* First see if there is data in the buffer...
*/
DEBUG_printf(("2httpWait(http=%p, msec=%d)", (void *)http, msec));
if (http == NULL)
return (0);
if (http->used)
{
DEBUG_puts("3httpWait: Returning 1 since there is buffered data ready.");
return (1);
}
#ifdef HAVE_LIBZ
if (http->coding >= _HTTP_CODING_GUNZIP && http->stream.avail_in > 0)
{
DEBUG_puts("3httpWait: Returning 1 since there is buffered data ready.");
return (1);
}
#endif /* HAVE_LIBZ */
/*
* Flush pending data, if any...
*/
if (http->wused)
{
DEBUG_puts("3httpWait: Flushing write buffer.");
if (httpFlushWrite(http) < 0)
return (0);
}
/*
* If not, check the SSL/TLS buffers and do a select() on the connection...
*/
return (_httpWait(http, msec, 1));
}
/*
* 'httpWrite()' - Write data to a HTTP connection.
*
* This function is deprecated. Use the httpWrite2() function which can
* write more than 2GB of data.
*
* @deprecated@
*/
int /* O - Number of bytes written */
httpWrite(http_t *http, /* I - HTTP connection */
const char *buffer, /* I - Buffer for data */
int length) /* I - Number of bytes to write */
{
return ((int)httpWrite2(http, buffer, (size_t)length));
}
/*
* 'httpWrite2()' - Write data to a HTTP connection.
*
* @since CUPS 1.2/macOS 10.5@
*/
ssize_t /* O - Number of bytes written */
httpWrite2(http_t *http, /* I - HTTP connection */
const char *buffer, /* I - Buffer for data */
size_t length) /* I - Number of bytes to write */
{
ssize_t bytes; /* Bytes written */
DEBUG_printf(("httpWrite2(http=%p, buffer=%p, length=" CUPS_LLFMT ")", (void *)http, (void *)buffer, CUPS_LLCAST length));
/*
* Range check input...
*/
if (!http || !buffer)
{
DEBUG_puts("1httpWrite2: Returning -1 due to bad input.");
return (-1);
}
/*
* Mark activity on the connection...
*/
http->activity = time(NULL);
/*
* Buffer small writes for better performance...
*/
#ifdef HAVE_LIBZ
if (http->coding == _HTTP_CODING_GZIP || http->coding == _HTTP_CODING_DEFLATE)
{
DEBUG_printf(("1httpWrite2: http->coding=%d", http->coding));
if (length == 0)
{
http_content_coding_finish(http);
bytes = 0;
}
else
{
size_t slen; /* Bytes to write */
ssize_t sret; /* Bytes written */
http->stream.next_in = (Bytef *)buffer;
http->stream.avail_in = (uInt)length;
while (deflate(&(http->stream), Z_NO_FLUSH) == Z_OK)
{
DEBUG_printf(("1httpWrite2: avail_out=%d", http->stream.avail_out));
if (http->stream.avail_out > 0)
continue;
slen = _HTTP_MAX_SBUFFER - http->stream.avail_out;
DEBUG_printf(("1httpWrite2: Writing intermediate chunk, len=%d", (int)slen));
if (slen > 0 && http->data_encoding == HTTP_ENCODING_CHUNKED)
sret = http_write_chunk(http, (char *)http->sbuffer, slen);
else if (slen > 0)
sret = http_write(http, (char *)http->sbuffer, slen);
else
sret = 0;
if (sret < 0)
{
DEBUG_puts("1httpWrite2: Unable to write, returning -1.");
return (-1);
}
http->stream.next_out = (Bytef *)http->sbuffer;
http->stream.avail_out = (uInt)_HTTP_MAX_SBUFFER;
}
bytes = (ssize_t)length;
}
}
else
#endif /* HAVE_LIBZ */
if (length > 0)
{
if (http->wused && (length + (size_t)http->wused) > sizeof(http->wbuffer))
{
DEBUG_printf(("2httpWrite2: Flushing buffer (wused=%d, length="
CUPS_LLFMT ")", http->wused, CUPS_LLCAST length));
httpFlushWrite(http);
}
if ((length + (size_t)http->wused) <= sizeof(http->wbuffer) && length < sizeof(http->wbuffer))
{
/*
* Write to buffer...
*/
DEBUG_printf(("2httpWrite2: Copying " CUPS_LLFMT " bytes to wbuffer...",
CUPS_LLCAST length));
memcpy(http->wbuffer + http->wused, buffer, length);
http->wused += (int)length;
bytes = (ssize_t)length;
}
else
{
/*
* Otherwise write the data directly...
*/
DEBUG_printf(("2httpWrite2: Writing " CUPS_LLFMT " bytes to socket...",
CUPS_LLCAST length));
if (http->data_encoding == HTTP_ENCODING_CHUNKED)
bytes = (ssize_t)http_write_chunk(http, buffer, length);
else
bytes = (ssize_t)http_write(http, buffer, length);
DEBUG_printf(("2httpWrite2: Wrote " CUPS_LLFMT " bytes...",
CUPS_LLCAST bytes));
}
if (http->data_encoding == HTTP_ENCODING_LENGTH)
http->data_remaining -= bytes;
}
else
bytes = 0;
/*
* Handle end-of-request processing...
*/
if ((http->data_encoding == HTTP_ENCODING_CHUNKED && length == 0) ||
(http->data_encoding == HTTP_ENCODING_LENGTH && http->data_remaining == 0))
{
/*
* Finished with the transfer; unless we are sending POST or PUT
* data, go idle...
*/
#ifdef HAVE_LIBZ
if (http->coding == _HTTP_CODING_GZIP || http->coding == _HTTP_CODING_DEFLATE)
http_content_coding_finish(http);
#endif /* HAVE_LIBZ */
if (http->wused)
{
if (httpFlushWrite(http) < 0)
return (-1);
}
if (http->data_encoding == HTTP_ENCODING_CHUNKED)
{
/*
* Send a 0-length chunk at the end of the request...
*/
http_write(http, "0\r\n\r\n", 5);
/*
* Reset the data state...
*/
http->data_encoding = HTTP_ENCODING_FIELDS;
http->data_remaining = 0;
}
if (http->state == HTTP_STATE_POST_RECV)
http->state ++;
else if (http->state == HTTP_STATE_POST_SEND ||
http->state == HTTP_STATE_GET_SEND)
http->state = HTTP_STATE_WAITING;
else
http->state = HTTP_STATE_STATUS;
DEBUG_printf(("2httpWrite2: Changed state to %s.",
httpStateString(http->state)));
}
DEBUG_printf(("1httpWrite2: Returning " CUPS_LLFMT ".", CUPS_LLCAST bytes));
return (bytes);
}
/*
* 'httpWriteResponse()' - Write a HTTP response to a client connection.
*
* @since CUPS 1.7/macOS 10.9@
*/
int /* O - 0 on success, -1 on error */
httpWriteResponse(http_t *http, /* I - HTTP connection */
http_status_t status) /* I - Status code */
{
http_encoding_t old_encoding; /* Old data_encoding value */
off_t old_remaining; /* Old data_remaining value */
/*
* Range check input...
*/
DEBUG_printf(("httpWriteResponse(http=%p, status=%d)", (void *)http, status));
if (!http || status < HTTP_STATUS_CONTINUE)
{
DEBUG_puts("1httpWriteResponse: Bad input.");
return (-1);
}
/*
* Set the various standard fields if they aren't already...
*/
if (!http->fields[HTTP_FIELD_DATE][0])
httpSetField(http, HTTP_FIELD_DATE, httpGetDateString(time(NULL)));
if (status >= HTTP_STATUS_BAD_REQUEST && http->keep_alive)
{
http->keep_alive = HTTP_KEEPALIVE_OFF;
httpSetField(http, HTTP_FIELD_KEEP_ALIVE, "");
}
if (http->version == HTTP_VERSION_1_1)
{
if (!http->fields[HTTP_FIELD_CONNECTION][0])
{
if (http->keep_alive)
httpSetField(http, HTTP_FIELD_CONNECTION, "Keep-Alive");
else
httpSetField(http, HTTP_FIELD_CONNECTION, "close");
}
if (http->keep_alive && !http->fields[HTTP_FIELD_KEEP_ALIVE][0])
httpSetField(http, HTTP_FIELD_KEEP_ALIVE, "timeout=10");
}
#ifdef HAVE_SSL
if (status == HTTP_STATUS_UPGRADE_REQUIRED ||
status == HTTP_STATUS_SWITCHING_PROTOCOLS)
{
if (!http->fields[HTTP_FIELD_CONNECTION][0])
httpSetField(http, HTTP_FIELD_CONNECTION, "Upgrade");
if (!http->fields[HTTP_FIELD_UPGRADE][0])
httpSetField(http, HTTP_FIELD_UPGRADE, "TLS/1.2,TLS/1.1,TLS/1.0");
if (!http->fields[HTTP_FIELD_CONTENT_LENGTH][0])
httpSetField(http, HTTP_FIELD_CONTENT_LENGTH, "0");
}
#endif /* HAVE_SSL */
if (!http->server)
httpSetField(http, HTTP_FIELD_SERVER,
http->default_server ? http->default_server : CUPS_MINIMAL);
/*
* Set the Accept-Encoding field if it isn't already...
*/
if (!http->accept_encoding)
httpSetField(http, HTTP_FIELD_ACCEPT_ENCODING,
http->default_accept_encoding ? http->default_accept_encoding :
#ifdef HAVE_LIBZ
"gzip, deflate, identity");
#else
"identity");
#endif /* HAVE_LIBZ */
/*
* Send the response header...
*/
old_encoding = http->data_encoding;
old_remaining = http->data_remaining;
http->data_encoding = HTTP_ENCODING_FIELDS;
if (httpPrintf(http, "HTTP/%d.%d %d %s\r\n", http->version / 100,
http->version % 100, (int)status, httpStatus(status)) < 0)
{
http->status = HTTP_STATUS_ERROR;
return (-1);
}
if (status != HTTP_STATUS_CONTINUE)
{
/*
* 100 Continue doesn't have the rest of the response headers...
*/
int i; /* Looping var */
const char *value; /* Field value */
for (i = 0; i < HTTP_FIELD_MAX; i ++)
{
if ((value = httpGetField(http, i)) != NULL && *value)
{
if (httpPrintf(http, "%s: %s\r\n", http_fields[i], value) < 1)
{
http->status = HTTP_STATUS_ERROR;
return (-1);
}
}
}
if (http->cookie)
{
if (strchr(http->cookie, ';'))
{
if (httpPrintf(http, "Set-Cookie: %s\r\n", http->cookie) < 1)
{
http->status = HTTP_STATUS_ERROR;
return (-1);
}
}
else if (httpPrintf(http, "Set-Cookie: %s; path=/; httponly;%s\r\n", http->cookie, http->tls ? " secure;" : "") < 1)
{
http->status = HTTP_STATUS_ERROR;
return (-1);
}
}
/*
* "Click-jacking" defense (STR #4492)...
*/
if (httpPrintf(http, "X-Frame-Options: DENY\r\n"
"Content-Security-Policy: frame-ancestors 'none'\r\n") < 1)
{
http->status = HTTP_STATUS_ERROR;
return (-1);
}
}
if (httpWrite2(http, "\r\n", 2) < 2)
{
http->status = HTTP_STATUS_ERROR;
return (-1);
}
if (httpFlushWrite(http) < 0)
{
http->status = HTTP_STATUS_ERROR;
return (-1);
}
if (status == HTTP_STATUS_CONTINUE ||
status == HTTP_STATUS_SWITCHING_PROTOCOLS)
{
/*
* Restore the old data_encoding and data_length values...
*/
http->data_encoding = old_encoding;
http->data_remaining = old_remaining;
if (old_remaining <= INT_MAX)
http->_data_remaining = (int)old_remaining;
else
http->_data_remaining = INT_MAX;
}
else if (http->state == HTTP_STATE_OPTIONS ||
http->state == HTTP_STATE_HEAD ||
http->state == HTTP_STATE_PUT ||
http->state == HTTP_STATE_TRACE ||
http->state == HTTP_STATE_CONNECT ||
http->state == HTTP_STATE_STATUS)
{
DEBUG_printf(("1httpWriteResponse: Resetting state to HTTP_STATE_WAITING, "
"was %s.", httpStateString(http->state)));
http->state = HTTP_STATE_WAITING;
}
else
{
/*
* Force data_encoding and data_length to be set according to the response
* headers...
*/
http_set_length(http);
if (http->data_encoding == HTTP_ENCODING_LENGTH && http->data_remaining == 0)
{
DEBUG_printf(("1httpWriteResponse: Resetting state to HTTP_STATE_WAITING, "
"was %s.", httpStateString(http->state)));
http->state = HTTP_STATE_WAITING;
return (0);
}
if (http->state == HTTP_STATE_POST_RECV || http->state == HTTP_STATE_GET)
http->state ++;
#ifdef HAVE_LIBZ
/*
* Then start any content encoding...
*/
DEBUG_puts("1httpWriteResponse: Calling http_content_coding_start.");
http_content_coding_start(http,
httpGetField(http, HTTP_FIELD_CONTENT_ENCODING));
#endif /* HAVE_LIBZ */
}
return (0);
}
#ifdef HAVE_LIBZ
/*
* 'http_content_coding_finish()' - Finish doing any content encoding.
*/
static void
http_content_coding_finish(
http_t *http) /* I - HTTP connection */
{
int zerr; /* Compression status */
Byte dummy[1]; /* Dummy read buffer */
size_t bytes; /* Number of bytes to write */
DEBUG_printf(("http_content_coding_finish(http=%p)", (void *)http));
DEBUG_printf(("1http_content_coding_finishing: http->coding=%d", http->coding));
switch (http->coding)
{
case _HTTP_CODING_DEFLATE :
case _HTTP_CODING_GZIP :
http->stream.next_in = dummy;
http->stream.avail_in = 0;
do
{
zerr = deflate(&(http->stream), Z_FINISH);
bytes = _HTTP_MAX_SBUFFER - http->stream.avail_out;
if (bytes > 0)
{
DEBUG_printf(("1http_content_coding_finish: Writing trailing chunk, len=%d", (int)bytes));
if (http->data_encoding == HTTP_ENCODING_CHUNKED)
http_write_chunk(http, (char *)http->sbuffer, bytes);
else
http_write(http, (char *)http->sbuffer, bytes);
}
http->stream.next_out = (Bytef *)http->sbuffer;
http->stream.avail_out = (uInt)_HTTP_MAX_SBUFFER;
}
while (zerr == Z_OK);
deflateEnd(&(http->stream));
free(http->sbuffer);
http->sbuffer = NULL;
if (http->wused)
httpFlushWrite(http);
break;
case _HTTP_CODING_INFLATE :
case _HTTP_CODING_GUNZIP :
inflateEnd(&(http->stream));
free(http->sbuffer);
http->sbuffer = NULL;
break;
default :
break;
}
http->coding = _HTTP_CODING_IDENTITY;
}
/*
* 'http_content_coding_start()' - Start doing content encoding.
*/
static void
http_content_coding_start(
http_t *http, /* I - HTTP connection */
const char *value) /* I - Value of Content-Encoding */
{
int zerr; /* Error/status */
_http_coding_t coding; /* Content coding value */
DEBUG_printf(("http_content_coding_start(http=%p, value=\"%s\")", (void *)http, value));
if (http->coding != _HTTP_CODING_IDENTITY)
{
DEBUG_printf(("1http_content_coding_start: http->coding already %d.",
http->coding));
return;
}
else if (!strcmp(value, "x-gzip") || !strcmp(value, "gzip"))
{
if (http->state == HTTP_STATE_GET_SEND ||
http->state == HTTP_STATE_POST_SEND)
coding = http->mode == _HTTP_MODE_SERVER ? _HTTP_CODING_GZIP :
_HTTP_CODING_GUNZIP;
else if (http->state == HTTP_STATE_POST_RECV ||
http->state == HTTP_STATE_PUT_RECV)
coding = http->mode == _HTTP_MODE_CLIENT ? _HTTP_CODING_GZIP :
_HTTP_CODING_GUNZIP;
else
{
DEBUG_puts("1http_content_coding_start: Not doing content coding.");
return;
}
}
else if (!strcmp(value, "x-deflate") || !strcmp(value, "deflate"))
{
if (http->state == HTTP_STATE_GET_SEND ||
http->state == HTTP_STATE_POST_SEND)
coding = http->mode == _HTTP_MODE_SERVER ? _HTTP_CODING_DEFLATE :
_HTTP_CODING_INFLATE;
else if (http->state == HTTP_STATE_POST_RECV ||
http->state == HTTP_STATE_PUT_RECV)
coding = http->mode == _HTTP_MODE_CLIENT ? _HTTP_CODING_DEFLATE :
_HTTP_CODING_INFLATE;
else
{
DEBUG_puts("1http_content_coding_start: Not doing content coding.");
return;
}
}
else
{
DEBUG_puts("1http_content_coding_start: Not doing content coding.");
return;
}
memset(&(http->stream), 0, sizeof(http->stream));
switch (coding)
{
case _HTTP_CODING_DEFLATE :
case _HTTP_CODING_GZIP :
if (http->wused)
httpFlushWrite(http);
if ((http->sbuffer = malloc(_HTTP_MAX_SBUFFER)) == NULL)
{
http->status = HTTP_STATUS_ERROR;
http->error = errno;
return;
}
/*
* Window size for compression is 11 bits - optimal based on PWG Raster
* sample files on pwg.org. -11 is raw deflate, 27 is gzip, per ZLIB
* documentation.
*/
if ((zerr = deflateInit2(&(http->stream), Z_DEFAULT_COMPRESSION,
Z_DEFLATED,
coding == _HTTP_CODING_DEFLATE ? -11 : 27, 7,
Z_DEFAULT_STRATEGY)) < Z_OK)
{
http->status = HTTP_STATUS_ERROR;
http->error = zerr == Z_MEM_ERROR ? ENOMEM : EINVAL;
return;
}
http->stream.next_out = (Bytef *)http->sbuffer;
http->stream.avail_out = (uInt)_HTTP_MAX_SBUFFER;
break;
case _HTTP_CODING_INFLATE :
case _HTTP_CODING_GUNZIP :
if ((http->sbuffer = malloc(_HTTP_MAX_SBUFFER)) == NULL)
{
http->status = HTTP_STATUS_ERROR;
http->error = errno;
return;
}
/*
* Window size for decompression is up to 15 bits (maximum supported).
* -15 is raw inflate, 31 is gunzip, per ZLIB documentation.
*/
if ((zerr = inflateInit2(&(http->stream),
coding == _HTTP_CODING_INFLATE ? -15 : 31))
< Z_OK)
{
free(http->sbuffer);
http->sbuffer = NULL;
http->status = HTTP_STATUS_ERROR;
http->error = zerr == Z_MEM_ERROR ? ENOMEM : EINVAL;
return;
}
http->stream.avail_in = 0;
http->stream.next_in = http->sbuffer;
break;
default :
break;
}
http->coding = coding;
DEBUG_printf(("1http_content_coding_start: http->coding now %d.",
http->coding));
}
#endif /* HAVE_LIBZ */
/*
* 'http_create()' - Create an unconnected HTTP connection.
*/
static http_t * /* O - HTTP connection */
http_create(
const char *host, /* I - Hostname */
int port, /* I - Port number */
http_addrlist_t *addrlist, /* I - Address list or NULL */
int family, /* I - Address family or AF_UNSPEC */
http_encryption_t encryption, /* I - Encryption to use */
int blocking, /* I - 1 for blocking mode */
_http_mode_t mode) /* I - _HTTP_MODE_CLIENT or _SERVER */
{
http_t *http; /* New HTTP connection */
char service[255]; /* Service name */
http_addrlist_t *myaddrlist = NULL; /* My address list */
DEBUG_printf(("4http_create(host=\"%s\", port=%d, addrlist=%p, family=%d, encryption=%d, blocking=%d, mode=%d)", host, port, (void *)addrlist, family, encryption, blocking, mode));
if (!host && mode == _HTTP_MODE_CLIENT)
return (NULL);
httpInitialize();
/*
* Lookup the host...
*/
if (addrlist)
{
myaddrlist = httpAddrCopyList(addrlist);
}
else
{
snprintf(service, sizeof(service), "%d", port);
myaddrlist = httpAddrGetList(host, family, service);
}
if (!myaddrlist)
return (NULL);
/*
* Allocate memory for the structure...
*/
if ((http = calloc(sizeof(http_t), 1)) == NULL)
{
_cupsSetError(IPP_STATUS_ERROR_INTERNAL, strerror(errno), 0);
httpAddrFreeList(addrlist);
return (NULL);
}
/*
* Initialize the HTTP data...
*/
http->mode = mode;
http->activity = time(NULL);
http->addrlist = myaddrlist;
http->blocking = blocking;
http->fd = -1;
#ifdef HAVE_GSSAPI
http->gssctx = GSS_C_NO_CONTEXT;
http->gssname = GSS_C_NO_NAME;
#endif /* HAVE_GSSAPI */
http->status = HTTP_STATUS_CONTINUE;
http->version = HTTP_VERSION_1_1;
if (host)
strlcpy(http->hostname, host, sizeof(http->hostname));
if (port == 443) /* Always use encryption for https */
http->encryption = HTTP_ENCRYPTION_ALWAYS;
else
http->encryption = encryption;
http_set_wait(http);
/*
* Return the new structure...
*/
return (http);
}
#ifdef DEBUG
/*
* 'http_debug_hex()' - Do a hex dump of a buffer.
*/
static void
http_debug_hex(const char *prefix, /* I - Prefix for line */
const char *buffer, /* I - Buffer to dump */
int bytes) /* I - Bytes to dump */
{
int i, j, /* Looping vars */
ch; /* Current character */
char line[255], /* Line buffer */
*start, /* Start of line after prefix */
*ptr; /* Pointer into line */
if (_cups_debug_fd < 0 || _cups_debug_level < 6)
return;
DEBUG_printf(("6%s: %d bytes:", prefix, bytes));
snprintf(line, sizeof(line), "6%s: ", prefix);
start = line + strlen(line);
for (i = 0; i < bytes; i += 16)
{
for (j = 0, ptr = start; j < 16 && (i + j) < bytes; j ++, ptr += 2)
snprintf(ptr, 3, "%02X", buffer[i + j] & 255);
while (j < 16)
{
memcpy(ptr, " ", 3);
ptr += 2;
j ++;
}
memcpy(ptr, " ", 3);
ptr += 2;
for (j = 0; j < 16 && (i + j) < bytes; j ++)
{
ch = buffer[i + j] & 255;
if (ch < ' ' || ch >= 127)
ch = '.';
*ptr++ = (char)ch;
}
*ptr = '\0';
DEBUG_puts(line);
}
}
#endif /* DEBUG */
/*
* 'http_read()' - Read a buffer from a HTTP connection.
*
* This function does the low-level read from the socket, retrying and timing
* out as needed.
*/
static ssize_t /* O - Number of bytes read or -1 on error */
http_read(http_t *http, /* I - HTTP connection */
char *buffer, /* I - Buffer */
size_t length) /* I - Maximum bytes to read */
{
ssize_t bytes; /* Bytes read */
DEBUG_printf(("http_read(http=%p, buffer=%p, length=" CUPS_LLFMT ")", (void *)http, (void *)buffer, CUPS_LLCAST length));
if (!http->blocking)
{
while (!httpWait(http, http->wait_value))
{
if (http->timeout_cb && (*http->timeout_cb)(http, http->timeout_data))
continue;
DEBUG_puts("2http_read: Timeout.");
return (0);
}
}
DEBUG_printf(("2http_read: Reading %d bytes into buffer.", (int)length));
do
{
#ifdef HAVE_SSL
if (http->tls)
bytes = _httpTLSRead(http, buffer, (int)length);
else
#endif /* HAVE_SSL */
bytes = recv(http->fd, buffer, length, 0);
if (bytes < 0)
{
#ifdef WIN32
if (WSAGetLastError() != WSAEINTR)
{
http->error = WSAGetLastError();
return (-1);
}
else if (WSAGetLastError() == WSAEWOULDBLOCK)
{
if (!http->timeout_cb ||
!(*http->timeout_cb)(http, http->timeout_data))
{
http->error = WSAEWOULDBLOCK;
return (-1);
}
}
#else
DEBUG_printf(("2http_read: %s", strerror(errno)));
if (errno == EWOULDBLOCK || errno == EAGAIN)
{
if (http->timeout_cb && !(*http->timeout_cb)(http, http->timeout_data))
{
http->error = errno;
return (-1);
}
else if (!http->timeout_cb && errno != EAGAIN)
{
http->error = errno;
return (-1);
}
}
else if (errno != EINTR)
{
http->error = errno;
return (-1);
}
#endif /* WIN32 */
}
}
while (bytes < 0);
DEBUG_printf(("2http_read: Read " CUPS_LLFMT " bytes into buffer.",
CUPS_LLCAST bytes));
#ifdef DEBUG
if (bytes > 0)
http_debug_hex("http_read", buffer, (int)bytes);
#endif /* DEBUG */
if (bytes < 0)
{
#ifdef WIN32
if (WSAGetLastError() == WSAEINTR)
bytes = 0;
else
http->error = WSAGetLastError();
#else
if (errno == EINTR || (errno == EAGAIN && !http->timeout_cb))
bytes = 0;
else
http->error = errno;
#endif /* WIN32 */
}
else if (bytes == 0)
{
http->error = EPIPE;
return (0);
}
return (bytes);
}
/*
* 'http_read_buffered()' - Do a buffered read from a HTTP connection.
*
* This function reads data from the HTTP buffer or from the socket, as needed.
*/
static ssize_t /* O - Number of bytes read or -1 on error */
http_read_buffered(http_t *http, /* I - HTTP connection */
char *buffer, /* I - Buffer */
size_t length) /* I - Maximum bytes to read */
{
ssize_t bytes; /* Bytes read */
DEBUG_printf(("http_read_buffered(http=%p, buffer=%p, length=" CUPS_LLFMT ") used=%d", (void *)http, (void *)buffer, CUPS_LLCAST length, http->used));
if (http->used > 0)
{
if (length > (size_t)http->used)
bytes = (ssize_t)http->used;
else
bytes = (ssize_t)length;
DEBUG_printf(("2http_read: Grabbing %d bytes from input buffer.",
(int)bytes));
memcpy(buffer, http->buffer, (size_t)bytes);
http->used -= (int)bytes;
if (http->used > 0)
memmove(http->buffer, http->buffer + bytes, (size_t)http->used);
}
else
bytes = http_read(http, buffer, length);
return (bytes);
}
/*
* 'http_read_chunk()' - Read a chunk from a HTTP connection.
*
* This function reads and validates the chunk length, then does a buffered read
* returning the number of bytes placed in the buffer.
*/
static ssize_t /* O - Number of bytes read or -1 on error */
http_read_chunk(http_t *http, /* I - HTTP connection */
char *buffer, /* I - Buffer */
size_t length) /* I - Maximum bytes to read */
{
DEBUG_printf(("http_read_chunk(http=%p, buffer=%p, length=" CUPS_LLFMT ")", (void *)http, (void *)buffer, CUPS_LLCAST length));
if (http->data_remaining <= 0)
{
char len[32]; /* Length string */
if (!httpGets(len, sizeof(len), http))
{
DEBUG_puts("1http_read_chunk: Could not get chunk length.");
return (0);
}
if (!len[0])
{
DEBUG_puts("1http_read_chunk: Blank chunk length, trying again...");
if (!httpGets(len, sizeof(len), http))
{
DEBUG_puts("1http_read_chunk: Could not get chunk length.");
return (0);
}
}
http->data_remaining = strtoll(len, NULL, 16);
if (http->data_remaining < 0)
{
DEBUG_printf(("1http_read_chunk: Negative chunk length \"%s\" ("
CUPS_LLFMT ")", len, CUPS_LLCAST http->data_remaining));
return (0);
}
DEBUG_printf(("2http_read_chunk: Got chunk length \"%s\" (" CUPS_LLFMT ")",
len, CUPS_LLCAST http->data_remaining));
if (http->data_remaining == 0)
{
/*
* 0-length chunk, grab trailing blank line...
*/
httpGets(len, sizeof(len), http);
}
}
DEBUG_printf(("2http_read_chunk: data_remaining=" CUPS_LLFMT,
CUPS_LLCAST http->data_remaining));
if (http->data_remaining <= 0)
return (0);
else if (length > (size_t)http->data_remaining)
length = (size_t)http->data_remaining;
return (http_read_buffered(http, buffer, length));
}
/*
* 'http_send()' - Send a request with all fields and the trailing blank line.
*/
static int /* O - 0 on success, non-zero on error */
http_send(http_t *http, /* I - HTTP connection */
http_state_t request, /* I - Request code */
const char *uri) /* I - URI */
{
int i; /* Looping var */
char buf[1024]; /* Encoded URI buffer */
const char *value; /* Field value */
static const char * const codes[] = /* Request code strings */
{
NULL,
"OPTIONS",
"GET",
NULL,
"HEAD",
"POST",
NULL,
NULL,
"PUT",
NULL,
"DELETE",
"TRACE",
"CLOSE",
NULL,
NULL
};
DEBUG_printf(("4http_send(http=%p, request=HTTP_%s, uri=\"%s\")", (void *)http, codes[request], uri));
if (http == NULL || uri == NULL)
return (-1);
/*
* Set the User-Agent field if it isn't already...
*/
if (!http->fields[HTTP_FIELD_USER_AGENT][0])
{
if (http->default_user_agent)
httpSetField(http, HTTP_FIELD_USER_AGENT, http->default_user_agent);
else
httpSetField(http, HTTP_FIELD_USER_AGENT, cupsUserAgent());
}
/*
* Set the Accept-Encoding field if it isn't already...
*/
if (!http->accept_encoding && http->default_accept_encoding)
httpSetField(http, HTTP_FIELD_ACCEPT_ENCODING,
http->default_accept_encoding);
/*
* Encode the URI as needed...
*/
_httpEncodeURI(buf, uri, sizeof(buf));
/*
* See if we had an error the last time around; if so, reconnect...
*/
if (http->fd < 0 || http->status == HTTP_STATUS_ERROR ||
http->status >= HTTP_STATUS_BAD_REQUEST)
{
DEBUG_printf(("5http_send: Reconnecting, fd=%d, status=%d, tls_upgrade=%d",
http->fd, http->status, http->tls_upgrade));
if (httpReconnect2(http, 30000, NULL))
return (-1);
}
/*
* Flush any written data that is pending...
*/
if (http->wused)
{
if (httpFlushWrite(http) < 0)
if (httpReconnect2(http, 30000, NULL))
return (-1);
}
/*
* Send the request header...
*/
http->state = request;
http->data_encoding = HTTP_ENCODING_FIELDS;
if (request == HTTP_STATE_POST || request == HTTP_STATE_PUT)
http->state ++;
http->status = HTTP_STATUS_CONTINUE;
#ifdef HAVE_SSL
if (http->encryption == HTTP_ENCRYPTION_REQUIRED && !http->tls)
{
httpSetField(http, HTTP_FIELD_CONNECTION, "Upgrade");
httpSetField(http, HTTP_FIELD_UPGRADE, "TLS/1.2,TLS/1.1,TLS/1.0");
}
#endif /* HAVE_SSL */
if (httpPrintf(http, "%s %s HTTP/1.1\r\n", codes[request], buf) < 1)
{
http->status = HTTP_STATUS_ERROR;
return (-1);
}
for (i = 0; i < HTTP_FIELD_MAX; i ++)
if ((value = httpGetField(http, i)) != NULL && *value)
{
DEBUG_printf(("5http_send: %s: %s", http_fields[i], value));
if (i == HTTP_FIELD_HOST)
{
if (httpPrintf(http, "Host: %s:%d\r\n", value,
httpAddrPort(http->hostaddr)) < 1)
{
http->status = HTTP_STATUS_ERROR;
return (-1);
}
}
else if (httpPrintf(http, "%s: %s\r\n", http_fields[i], value) < 1)
{
http->status = HTTP_STATUS_ERROR;
return (-1);
}
}
if (http->cookie)
if (httpPrintf(http, "Cookie: $Version=0; %s\r\n", http->cookie) < 1)
{
http->status = HTTP_STATUS_ERROR;
return (-1);
}
DEBUG_printf(("5http_send: expect=%d, mode=%d, state=%d", http->expect,
http->mode, http->state));
if (http->expect == HTTP_STATUS_CONTINUE && http->mode == _HTTP_MODE_CLIENT &&
(http->state == HTTP_STATE_POST_RECV ||
http->state == HTTP_STATE_PUT_RECV))
if (httpPrintf(http, "Expect: 100-continue\r\n") < 1)
{
http->status = HTTP_STATUS_ERROR;
return (-1);
}
if (httpPrintf(http, "\r\n") < 1)
{
http->status = HTTP_STATUS_ERROR;
return (-1);
}
if (httpFlushWrite(http) < 0)
return (-1);
http_set_length(http);
httpClearFields(http);
/*
* The Kerberos and AuthRef authentication strings can only be used once...
*/
if (http->field_authorization && http->authstring &&
(!strncmp(http->authstring, "Negotiate", 9) ||
!strncmp(http->authstring, "AuthRef", 7)))
{
http->_authstring[0] = '\0';
if (http->authstring != http->_authstring)
free(http->authstring);
http->authstring = http->_authstring;
}
return (0);
}
/*
* 'http_set_length()' - Set the data_encoding and data_remaining values.
*/
static off_t /* O - Remainder or -1 on error */
http_set_length(http_t *http) /* I - Connection */
{
off_t remaining; /* Remainder */
DEBUG_printf(("http_set_length(http=%p) mode=%d state=%s", (void *)http, http->mode, httpStateString(http->state)));
if ((remaining = httpGetLength2(http)) >= 0)
{
if (http->mode == _HTTP_MODE_SERVER &&
http->state != HTTP_STATE_GET_SEND &&
http->state != HTTP_STATE_PUT &&
http->state != HTTP_STATE_POST &&
http->state != HTTP_STATE_POST_SEND)
{
DEBUG_puts("1http_set_length: Not setting data_encoding/remaining.");
return (remaining);
}
if (!_cups_strcasecmp(http->fields[HTTP_FIELD_TRANSFER_ENCODING],
"chunked"))
{
DEBUG_puts("1http_set_length: Setting data_encoding to "
"HTTP_ENCODING_CHUNKED.");
http->data_encoding = HTTP_ENCODING_CHUNKED;
}
else
{
DEBUG_puts("1http_set_length: Setting data_encoding to "
"HTTP_ENCODING_LENGTH.");
http->data_encoding = HTTP_ENCODING_LENGTH;
}
DEBUG_printf(("1http_set_length: Setting data_remaining to " CUPS_LLFMT ".",
CUPS_LLCAST remaining));
http->data_remaining = remaining;
if (remaining <= INT_MAX)
http->_data_remaining = (int)remaining;
else
http->_data_remaining = INT_MAX;
}
return (remaining);
}
/*
* 'http_set_timeout()' - Set the socket timeout values.
*/
static void
http_set_timeout(int fd, /* I - File descriptor */
double timeout) /* I - Timeout in seconds */
{
#ifdef WIN32
DWORD tv = (DWORD)(timeout * 1000);
/* Timeout in milliseconds */
setsockopt(fd, SOL_SOCKET, SO_RCVTIMEO, CUPS_SOCAST &tv, sizeof(tv));
setsockopt(fd, SOL_SOCKET, SO_SNDTIMEO, CUPS_SOCAST &tv, sizeof(tv));
#else
struct timeval tv; /* Timeout in secs and usecs */
tv.tv_sec = (int)timeout;
tv.tv_usec = (int)(1000000 * fmod(timeout, 1.0));
setsockopt(fd, SOL_SOCKET, SO_RCVTIMEO, CUPS_SOCAST &tv, sizeof(tv));
setsockopt(fd, SOL_SOCKET, SO_SNDTIMEO, CUPS_SOCAST &tv, sizeof(tv));
#endif /* WIN32 */
}
/*
* 'http_set_wait()' - Set the default wait value for reads.
*/
static void
http_set_wait(http_t *http) /* I - HTTP connection */
{
if (http->blocking)
{
http->wait_value = (int)(http->timeout_value * 1000);
if (http->wait_value <= 0)
http->wait_value = 60000;
}
else
http->wait_value = 10000;
}
#ifdef HAVE_SSL
/*
* 'http_tls_upgrade()' - Force upgrade to TLS encryption.
*/
static int /* O - Status of connection */
http_tls_upgrade(http_t *http) /* I - HTTP connection */
{
int ret; /* Return value */
http_t myhttp; /* Local copy of HTTP data */
DEBUG_printf(("7http_tls_upgrade(%p)", (void *)http));
/*
* Flush the connection to make sure any previous "Upgrade" message
* has been read.
*/
httpFlush(http);
/*
* Copy the HTTP data to a local variable so we can do the OPTIONS
* request without interfering with the existing request data...
*/
memcpy(&myhttp, http, sizeof(myhttp));
/*
* Send an OPTIONS request to the server, requiring SSL or TLS
* encryption on the link...
*/
http->tls_upgrade = 1;
http->field_authorization = NULL; /* Don't free the auth string */
httpClearFields(http);
httpSetField(http, HTTP_FIELD_CONNECTION, "upgrade");
httpSetField(http, HTTP_FIELD_UPGRADE, "TLS/1.2,TLS/1.1,TLS/1.0");
if ((ret = httpOptions(http, "*")) == 0)
{
/*
* Wait for the secure connection...
*/
while (httpUpdate(http) == HTTP_STATUS_CONTINUE);
}
/*
* Restore the HTTP request data...
*/
memcpy(http->fields, myhttp.fields, sizeof(http->fields));
http->data_encoding = myhttp.data_encoding;
http->data_remaining = myhttp.data_remaining;
http->_data_remaining = myhttp._data_remaining;
http->expect = myhttp.expect;
http->field_authorization = myhttp.field_authorization;
http->digest_tries = myhttp.digest_tries;
http->tls_upgrade = 0;
/*
* See if we actually went secure...
*/
if (!http->tls)
{
/*
* Server does not support HTTP upgrade...
*/
DEBUG_puts("8http_tls_upgrade: Server does not support HTTP upgrade!");
_cupsSetError(IPP_STATUS_ERROR_CUPS_PKI, _("Encryption is not supported."), 1);
httpAddrClose(NULL, http->fd);
http->fd = -1;
return (-1);
}
else
return (ret);
}
#endif /* HAVE_SSL */
/*
* 'http_write()' - Write a buffer to a HTTP connection.
*/
static ssize_t /* O - Number of bytes written */
http_write(http_t *http, /* I - HTTP connection */
const char *buffer, /* I - Buffer for data */
size_t length) /* I - Number of bytes to write */
{
ssize_t tbytes, /* Total bytes sent */
bytes; /* Bytes sent */
DEBUG_printf(("2http_write(http=%p, buffer=%p, length=" CUPS_LLFMT ")", (void *)http, (void *)buffer, CUPS_LLCAST length));
http->error = 0;
tbytes = 0;
while (length > 0)
{
DEBUG_printf(("3http_write: About to write %d bytes.", (int)length));
if (http->timeout_cb)
{
#ifdef HAVE_POLL
struct pollfd pfd; /* Polled file descriptor */
#else
fd_set output_set; /* Output ready for write? */
struct timeval timeout; /* Timeout value */
#endif /* HAVE_POLL */
int nfds; /* Result from select()/poll() */
do
{
#ifdef HAVE_POLL
pfd.fd = http->fd;
pfd.events = POLLOUT;
while ((nfds = poll(&pfd, 1, http->wait_value)) < 0 &&
(errno == EINTR || errno == EAGAIN))
/* do nothing */;
#else
do
{
FD_ZERO(&output_set);
FD_SET(http->fd, &output_set);
timeout.tv_sec = http->wait_value / 1000;
timeout.tv_usec = 1000 * (http->wait_value % 1000);
nfds = select(http->fd + 1, NULL, &output_set, NULL, &timeout);
}
# ifdef WIN32
while (nfds < 0 && (WSAGetLastError() == WSAEINTR ||
WSAGetLastError() == WSAEWOULDBLOCK));
# else
while (nfds < 0 && (errno == EINTR || errno == EAGAIN));
# endif /* WIN32 */
#endif /* HAVE_POLL */
if (nfds < 0)
{
http->error = errno;
return (-1);
}
else if (nfds == 0 && !(*http->timeout_cb)(http, http->timeout_data))
{
#ifdef WIN32
http->error = WSAEWOULDBLOCK;
#else
http->error = EWOULDBLOCK;
#endif /* WIN32 */
return (-1);
}
}
while (nfds <= 0);
}
#ifdef HAVE_SSL
if (http->tls)
bytes = _httpTLSWrite(http, buffer, (int)length);
else
#endif /* HAVE_SSL */
bytes = send(http->fd, buffer, length, 0);
DEBUG_printf(("3http_write: Write of " CUPS_LLFMT " bytes returned "
CUPS_LLFMT ".", CUPS_LLCAST length, CUPS_LLCAST bytes));
if (bytes < 0)
{
#ifdef WIN32
if (WSAGetLastError() == WSAEINTR)
continue;
else if (WSAGetLastError() == WSAEWOULDBLOCK)
{
if (http->timeout_cb && (*http->timeout_cb)(http, http->timeout_data))
continue;
http->error = WSAGetLastError();
}
else if (WSAGetLastError() != http->error &&
WSAGetLastError() != WSAECONNRESET)
{
http->error = WSAGetLastError();
continue;
}
#else
if (errno == EINTR)
continue;
else if (errno == EWOULDBLOCK || errno == EAGAIN)
{
if (http->timeout_cb && (*http->timeout_cb)(http, http->timeout_data))
continue;
else if (!http->timeout_cb && errno == EAGAIN)
continue;
http->error = errno;
}
else if (errno != http->error && errno != ECONNRESET)
{
http->error = errno;
continue;
}
#endif /* WIN32 */
DEBUG_printf(("3http_write: error writing data (%s).",
strerror(http->error)));
return (-1);
}
buffer += bytes;
tbytes += bytes;
length -= (size_t)bytes;
}
#ifdef DEBUG
http_debug_hex("http_write", buffer - tbytes, (int)tbytes);
#endif /* DEBUG */
DEBUG_printf(("3http_write: Returning " CUPS_LLFMT ".", CUPS_LLCAST tbytes));
return (tbytes);
}
/*
* 'http_write_chunk()' - Write a chunked buffer.
*/
static ssize_t /* O - Number bytes written */
http_write_chunk(http_t *http, /* I - HTTP connection */
const char *buffer, /* I - Buffer to write */
size_t length) /* I - Length of buffer */
{
char header[16]; /* Chunk header */
ssize_t bytes; /* Bytes written */
DEBUG_printf(("7http_write_chunk(http=%p, buffer=%p, length=" CUPS_LLFMT ")", (void *)http, (void *)buffer, CUPS_LLCAST length));
/*
* Write the chunk header, data, and trailer.
*/
snprintf(header, sizeof(header), "%x\r\n", (unsigned)length);
if (http_write(http, header, strlen(header)) < 0)
{
DEBUG_puts("8http_write_chunk: http_write of length failed.");
return (-1);
}
if ((bytes = http_write(http, buffer, length)) < 0)
{
DEBUG_puts("8http_write_chunk: http_write of buffer failed.");
return (-1);
}
if (http_write(http, "\r\n", 2) < 0)
{
DEBUG_puts("8http_write_chunk: http_write of CR LF failed.");
return (-1);
}
return (bytes);
}