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HTTP.c
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Mon Oct 30 10:04:23 2000 UTC (23 years, 6 months ago) by
kahan
Branches:
MAIN
CVS tags:
before_webdav,
HEAD,
Amaya-6-3,
Amaya-6-1,
Amaya-5-2,
Amaya-4-3-2,
Amaya-4-3-1,
Amaya-4-3,
Amaya-4-1-2,
Amaya-4-1-0,
Amaya-4-0-0
JK: Enhancement, added a new field to the HTResponse object to
store the HTTP reason sent by the server. Two new functions to
get it/set it: HTResponse_reason(), HTResponse_setReason()
/* HTTP.c
** MULTITHREADED IMPLEMENTATION OF HTTP CLIENT
**
** (c) COPYRIGHT MIT 1995.
** Please first read the full copyright statement in the file COPYRIGH.
** @(#) $Id: HTTP.c,v 1.190 2000/10/30 10:04:23 kahan Exp $
**
** This module implements the HTTP protocol as a state machine
**
** History:
** < May 24 94 ?? Unknown - but obviously written
** May 24 94 HF Made reentrent and cleaned up a bit. Implemented
** Forward, redirection, error handling and referer field
** 8 Jul 94 FM Insulate free() from _free structure element.
** Jul 94 HFN Written on top of HTTP.c, Henrik Frystyk
**
*/
/* Library include files */
#include "wwwsys.h"
#include "WWWUtil.h"
#include "WWWCore.h"
#include "HTHeader.h"
#include "HTMIMERq.h"
#include "HTReqMan.h"
#include "HTNetMan.h"
#include "HTTPUtil.h"
#include "HTTPReq.h"
#include "HTTP.h" /* Implements */
/* Macros and other defines */
#ifndef HTTP_PORT
#define HTTP_PORT 80 /* Allocated to http by Jon Postel/ISI 24-Jan-92 */
#endif
#define PUTC(c) (*me->target->isa->put_character)(me->target, c)
#define PUTS(s) (*me->target->isa->put_string)(me->target, s)
#define PUTBLOCK(b, l) (*me->target->isa->put_block)(me->target, b, l)
#define FREE_TARGET (*me->target->isa->_free)(me->target)
#define ABORT_TARGET (*me->target->isa->abort)(me->target, e)
#ifdef HTDEBUG
#include "WWWStream.h"
#define HTTP_OUTPUT "w3chttp.out"
PRIVATE FILE * htfp = NULL;
#endif
/* Type definitions and global variables etc. local to this module */
/* Final states have negative value */
typedef enum _HTTPState {
HTTP_KILL_PIPE = -4,
HTTP_RECOVER_PIPE = -3,
HTTP_ERROR = -2,
HTTP_OK = -1,
HTTP_BEGIN = 0,
HTTP_NEED_STREAM,
HTTP_CONNECTED
} HTTPState;
/* This is the context structure for the this module */
typedef struct _http_info {
HTTPState state; /* Current State of the connection */
HTTPState next; /* Next state */
int result; /* Result to report to the after filter */
BOOL lock; /* Block for writing */
HTNet * net;
HTRequest * request;
HTTimer * timer;
BOOL usedTimer;
BOOL repetitive_writing;
} http_info;
#define MAX_STATUS_LEN 100 /* Max nb of chars to check StatusLine */
struct _HTStream {
const HTStreamClass * isa;
HTStream * target;
HTStream * info_target; /* For 100 codes */
HTRequest * request;
http_info * http;
HTEOLState state;
BOOL transparent;
BOOL cont;
char * version; /* Should we save this? */
int status;
char * reason;
char buffer[MAX_STATUS_LEN+1];
int buflen;
int startLen;/* buflen when put_block was called */
};
struct _HTInputStream {
const HTInputStreamClass * isa;
};
/* How long to wait before writing the body in PUT and POST requests */
#define DEFAULT_FIRST_WRITE_DELAY 2000
#define DEFAULT_SECOND_WRITE_DELAY 3000
#define DEFAULT_REPEAT_WRITE 30
PRIVATE ms_t HTFirstWriteDelay = DEFAULT_FIRST_WRITE_DELAY;
PRIVATE ms_t HTSecondWriteDelay = DEFAULT_SECOND_WRITE_DELAY;
PRIVATE ms_t HTRepeatWrite = DEFAULT_REPEAT_WRITE;
#ifdef HT_NO_PIPELINING
PRIVATE HTTPConnectionMode ConnectionMode = HTTP_11_NO_PIPELINING;
#else
#ifdef HT_MUX
PRIVATE HTTPConnectionMode ConnectionMode = HTTP_11_MUX;
#else
#ifdef HT_FORCE_10
PRIVATE HTTPConnectionMode ConnectionMode = HTTP_FORCE_10;
#else
PRIVATE HTTPConnectionMode ConnectionMode = HTTP_11_PIPELINING;
#endif
#endif
#endif
/* ------------------------------------------------------------------------- */
/* Help Functions */
/* ------------------------------------------------------------------------- */
/* HTTPCleanup
** -----------
** This function closes the connection and frees memory.
** Returns YES on OK, else NO
*/
PRIVATE int HTTPCleanup (HTRequest *req, int status)
{
HTNet * net = HTRequest_net(req);
http_info * http = (http_info *) HTNet_context(net);
HTStream * input = HTRequest_inputStream(req);
HTTRACE(PROT_TRACE, "HTTP Clean.. Called with status %d, net %p\n" _ status _ net);
if (status == HT_INTERRUPTED) {
HTAlertCallback * cbf = HTAlert_find(HT_PROG_INTERRUPT);
if (cbf) (*cbf)(req, HT_PROG_INTERRUPT,
HT_MSG_NULL, NULL, NULL, NULL);
} else if (status == HT_TIMEOUT) {
HTAlertCallback * cbf = HTAlert_find(HT_PROG_TIMEOUT);
if (cbf) (*cbf)(req, HT_PROG_TIMEOUT,
HT_MSG_NULL, NULL, NULL, NULL);
}
/* Free stream with data TO network */
if (input) {
if (input->isa) {
if (status==HT_INTERRUPTED || status==HT_RECOVER_PIPE || status==HT_TIMEOUT)
(*input->isa->abort)(input, NULL);
else
(*input->isa->_free)(input);
}
HTRequest_setInputStream(req, NULL);
}
/*
** Remove if we have registered an upload function as a callback
*/
if (http && http->timer) {
HTTimer_delete(http->timer);
http->timer = NULL;
http->lock = NO;
}
/*
** Remove the request object and our own context structure for http.
*/
if (status != HT_RECOVER_PIPE) {
HTNet_delete(net, status);
HT_FREE(http);
}
return YES;
}
/*
** Informational 1xx codes are handled separately
** Returns YES if we should continue, NO if we should stop
*/
PRIVATE BOOL HTTPInformation (HTStream * me)
{
http_info * http = me->http;
switch (me->status) {
case 100:
#if 0
HTRequest_addError(me->request, ERR_INFO, NO, HTERR_CONTINUE,
me->reason, (int) strlen(me->reason),
"HTTPInformation");
#endif
http->result = HT_CONTINUE;
return YES;
break;
case 101:
/*
** We consider 101 Switching as a final state and exit this request
*/
HTRequest_addError(me->request, ERR_INFO, NO, HTERR_SWITCHING,
me->reason, (int) strlen(me->reason),
"HTTPInformation");
http->next = HTTP_OK;
http->result = HT_UPGRADE;
return YES;
break;
default:
HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_BAD_REPLY,
(void *) me->buffer, me->buflen, "HTTPNextState");
http->next = HTTP_ERROR;
http->result = HT_ERROR;
break;
}
return NO;
}
/*
** This is a big switch handling all HTTP return codes. It puts in any
** appropiate error message and decides whether we should expect data
** or not.
*/
PRIVATE void HTTPNextState (HTStream * me)
{
http_info * http = me->http;
int error_class = me->status / 100;
switch (error_class) {
case 0: /* 0.9 response */
case 2:
switch (me->status) {
case 201: /* Created */
HTRequest_addError(me->request, ERR_INFO, NO, HTERR_CREATED,
me->reason, (int) strlen(me->reason),
"HTTPNextState");
http->next = HTTP_OK;
http->result = HT_CREATED;
break;
case 202: /* Accepted */
HTRequest_addError(me->request, ERR_INFO, NO, HTERR_ACCEPTED,
me->reason, (int) strlen(me->reason),
"HTTPNextState");
http->next = HTTP_OK;
http->result = HT_ACCEPTED;
break;
case 203: /* Non-authoritative information */
HTRequest_addError(me->request, ERR_INFO, NO, HTERR_NON_AUTHORITATIVE,
me->reason, (int) strlen(me->reason),
"HTTPNextState");
http->next = HTTP_OK;
http->result = HT_LOADED;
break;
case 204: /* No Response */
HTRequest_addError(me->request, ERR_INFO, NO, HTERR_NO_CONTENT,
me->reason, (int) strlen(me->reason),
"HTTPNextState");
http->next = HTTP_OK;
http->result = HT_NO_DATA;
break;
case 205: /* Reset Content */
HTRequest_addError(me->request, ERR_INFO, NO, HTERR_RESET,
me->reason, (int) strlen(me->reason),
"HTTPNextState");
http->next = HTTP_OK;
http->result = HT_RESET_CONTENT;
break;
case 206: /* Partial Content */
HTRequest_addError(me->request, ERR_INFO, NO, HTERR_PARTIAL,
me->reason, (int) strlen(me->reason),
"HTTPNextState");
http->next = HTTP_OK;
http->result = HT_PARTIAL_CONTENT;
break;
case 207: /* Partial Update OK */
HTRequest_addError(me->request, ERR_INFO, NO, HTERR_PARTIAL_OK,
me->reason, (int) strlen(me->reason),
"HTTPNextState");
http->next = HTTP_OK;
http->result = HT_PARTIAL_CONTENT;
break;
default:
HTRequest_addError(me->request, ERR_INFO, NO, HTERR_OK,
me->reason, (int) strlen(me->reason),
"HTTPNextState");
http->next = HTTP_OK;
http->result = HT_LOADED;
break;
}
break;
case 3:
switch (me->status) {
case 301: /* Moved */
HTRequest_addError(me->request, ERR_INFO, NO, HTERR_MOVED,
me->reason, (int) strlen(me->reason),
"HTTPNextState");
http->next = HTTP_ERROR;
http->result = HT_PERM_REDIRECT;
break;
case 302: /* Found */
HTRequest_addError(me->request, ERR_INFO, NO, HTERR_FOUND,
me->reason, (int) strlen(me->reason),
"HTTPNextState");
http->next = HTTP_ERROR;
http->result = HT_FOUND;
break;
case 303: /* Method */
HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_METHOD,
me->reason, (int) strlen(me->reason),
"HTTPNextState");
http->next = HTTP_ERROR;
http->result = HT_SEE_OTHER;
break;
case 304: /* Not Modified */
HTRequest_addError(me->request, ERR_INFO, NO, HTERR_NOT_MODIFIED,
me->reason, (int) strlen(me->reason),
"HTTPNextState");
http->next = HTTP_OK;
http->result = HT_NOT_MODIFIED;
break;
case 305: /* Use proxy */
HTRequest_addError(me->request, ERR_INFO, NO, HTERR_USE_PROXY,
me->reason, (int) strlen(me->reason),
"HTTPNextState");
http->next = HTTP_ERROR;
http->result = HT_USE_PROXY;
break;
#if 0
case 306: /* Use proxy */
HTRequest_addError(me->request, ERR_INFO, NO, HTERR_PROXY_REDIRECT,
me->reason, (int) strlen(me->reason),
"HTTPNextState");
http->next = HTTP_ERROR;
http->result = HT_USE_PROXY;
break;
#endif
case 307: /* Use proxy */
HTRequest_addError(me->request, ERR_INFO, NO, HTERR_TEMP_REDIRECT,
me->reason, (int) strlen(me->reason),
"HTTPNextState");
http->next = HTTP_ERROR;
http->result = HT_TEMP_REDIRECT;
break;
default:
HTRequest_addError(me->request, ERR_INFO, NO, HTERR_MULTIPLE,
me->reason, (int) strlen(me->reason),
"HTTPNextState");
http->next = HTTP_OK;
http->result = HT_LOADED;
break;
}
break;
case 4:
switch (me->status) {
case 401:
HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_UNAUTHORIZED,
me->reason, (int) strlen(me->reason), "HTTPNextState");
http->next = HTTP_ERROR;
http->result = HT_NO_ACCESS;
break;
case 402: /* Payment required */
HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_PAYMENT_REQUIRED,
me->reason, (int) strlen(me->reason), "HTTPNextState");
http->next = HTTP_ERROR;
http->result = -402;
break;
case 403: /* Forbidden */
HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_FORBIDDEN,
me->reason, (int) strlen(me->reason), "HTTPNextState");
http->next = HTTP_ERROR;
http->result = HT_FORBIDDEN;
break;
case 404: /* Not Found */
HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_NOT_FOUND,
me->reason, (int) strlen(me->reason), "HTTPNextState");
http->next = HTTP_ERROR;
http->result = -404;
break;
case 405: /* Not Allowed */
HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_NOT_ALLOWED,
me->reason, (int) strlen(me->reason), "HTTPNextState");
http->next = HTTP_ERROR;
http->result = -405;
break;
case 406: /* None Acceptable */
HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_NONE_ACCEPTABLE,
me->reason, (int) strlen(me->reason), "HTTPNextState");
http->next = HTTP_ERROR;
http->result = HT_NOT_ACCEPTABLE;
break;
case 407: /* Proxy Authentication Required */
HTRequest_addError(me->request, ERR_FATAL, NO,HTERR_PROXY_UNAUTHORIZED,
me->reason, (int) strlen(me->reason), "HTTPNextState");
http->next = HTTP_ERROR;
http->result = HT_NO_PROXY_ACCESS;
break;
case 408: /* Request Timeout */
HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_TIMEOUT,
me->reason, (int) strlen(me->reason), "HTTPNextState");
http->next = HTTP_ERROR;
http->result = -408;
break;
case 409: /* Conflict */
HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_CONFLICT,
me->reason, (int) strlen(me->reason), "HTTPNextState");
http->next = HTTP_ERROR;
http->result = HT_CONFLICT;
break;
case 410: /* Gone */
HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_GONE,
me->reason, (int) strlen(me->reason), "HTTPNextState");
http->next = HTTP_ERROR;
http->result = -410;
break;
case 411: /* Length Required */
HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_LENGTH_REQUIRED,
me->reason, (int) strlen(me->reason), "HTTPNextState");
http->next = HTTP_ERROR;
http->result = HT_LENGTH_REQUIRED;
break;
case 412: /* Precondition failed */
HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_PRECON_FAILED,
me->reason, (int) strlen(me->reason), "HTTPNextState");
http->next = HTTP_ERROR;
http->result = -412;
break;
case 413: /* Request entity too large */
HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_TOO_BIG,
me->reason, (int) strlen(me->reason), "HTTPNextState");
http->next = HTTP_ERROR;
http->result = -413;
break;
case 414: /* Request-URI too long */
HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_URI_TOO_BIG,
me->reason, (int) strlen(me->reason), "HTTPNextState");
http->next = HTTP_ERROR;
http->result = -414;
break;
case 415: /* Unsupported */
HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_UNSUPPORTED,
me->reason, (int) strlen(me->reason), "HTTPNextState");
http->next = HTTP_ERROR;
http->result = -415;
break;
case 416: /* Request Range not satisfiable */
HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_BAD_RANGE,
me->reason, (int) strlen(me->reason), "HTTPNextState");
http->next = HTTP_ERROR;
http->result = -416;
break;
case 417: /* Expectation Failed */
HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_EXPECTATION_FAILED,
me->reason, (int) strlen(me->reason), "HTTPNextState");
http->next = HTTP_ERROR;
http->result = -417;
break;
case 418: /* Reauthentication required */
HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_REAUTH,
me->reason, (int) strlen(me->reason), "HTTPNextState");
http->next = HTTP_ERROR;
http->result = -418;
break;
case 419: /* Proxy Reauthentication required */
HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_PROXY_REAUTH,
me->reason, (int) strlen(me->reason), "HTTPNextState");
http->next = HTTP_ERROR;
http->result = -419;
break;
default:
HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_BAD_REQUEST,
me->reason, (int) strlen(me->reason), "HTTPNextState");
http->next = HTTP_ERROR;
http->result = -400;
break;
}
break;
case 5:
switch (me->status) {
case 501:
HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_NOT_IMPLEMENTED,
me->reason, (int) strlen(me->reason), "HTTPNextState");
http->next = HTTP_ERROR;
http->result = -501;
break;
case 502:
HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_BAD_GATE,
me->reason, (int) strlen(me->reason), "HTTPNextState");
http->next = HTTP_ERROR;
http->result = -502;
break;
case 503:
HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_DOWN,
me->reason, (int) strlen(me->reason), "HTTPNextState");
http->next = HTTP_ERROR;
/*
** If Retry-After header is found then return HT_RETRY else HT_ERROR.
** The caller may want to reissue the request at a later point in time.
*/
{
HTResponse * response = HTRequest_response(me->request);
if (HTResponse_retryTime(response))
http->result = HT_RETRY;
else
http->result = -500;
}
break;
case 504:
HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_GATE_TIMEOUT,
me->reason, (int) strlen(me->reason), "HTTPNextState");
http->next = HTTP_ERROR;
http->result = -504;
break;
case 505: /* Unsupported protocol version */
HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_BAD_VERSION,
me->reason, (int) strlen(me->reason), "HTTPNextState");
http->next = HTTP_ERROR;
http->result = HT_BAD_VERSION;
break;
case 506: /* Partial update Not Implemented */
HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_NO_PARTIAL_UPDATE,
me->reason, (int) strlen(me->reason), "HTTPNextState");
http->next = HTTP_ERROR;
http->result = HT_BAD_VERSION;
break;
default: /* bad number */
HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_INTERNAL,
me->reason, (int) strlen(me->reason), "HTTPNextState");
http->next = HTTP_ERROR;
http->result = -500;
break;
}
break;
default:
HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_BAD_REPLY,
(void *) me->buffer, me->buflen, "HTTPNextState");
http->next = HTTP_ERROR;
http->result = -(me->status);
break;
}
}
/* ------------------------------------------------------------------------- */
/* HTTP Status Line Stream */
/* ------------------------------------------------------------------------- */
/*
** Analyze the stream we have read. If it is a HTTP 1.0 or higher
** then create a MIME-stream, else create a Guess stream to find out
** what the 0.9 server is sending. We need to copy the buffer as we don't
** know if we can modify the contents or not.
**
** Stream handling is a function of the status code returned from the
** server:
** 200: Use `output_stream' in HTRequest structure
** else: Use `debug_stream' in HTRequest structure
**
** Return: YES if buffer should be written out. NO otherwise
*/
PRIVATE int stream_pipe (HTStream * me, int length)
{
HTRequest * request = me->request;
HTNet * net = HTRequest_net(request);
HTHost * host = HTNet_host(net);
#if 0
{
char * uri = HTAnchor_address((HTAnchor *) HTRequest_anchor(request));
fprintf(stderr, "HTTP header: %s for '%s'\n", me->buffer, uri);
HT_FREE(uri);
}
#endif
/*
** Just check for HTTP and not HTTP/ as NCSA server chokes on 1.1 replies
** Thanks to Markku Savela <msa@msa.tte.vtt.fi>
*/
if (strncasecomp(me->buffer, "http", 4)) {
int status;
HTRequest_addError(request, ERR_INFO, NO, HTERR_HTTP09,
(void *) me->buffer, me->buflen, "HTTPStatusStream");
me->target = HTStreamStack(WWW_UNKNOWN,
HTRequest_outputFormat(request),
HTRequest_outputStream(request),
request, NO);
me->http->next = HTTP_OK;
if ((status = PUTBLOCK(me->buffer, me->buflen)) == HT_OK)
me->transparent = YES;
/* JK: in 2000, we don't expect many HTTP/0.9 servers to remain.
I removed this line which made the backward change as most of
the time we fall here more due to a network or server problem,
rather than because we are accessing an old server. */
/* HTHost_setVersion(host, HTTP_09); */
if (length > 0) HTHost_setConsumed(host, length);
HTTRACE(PROT_TRACE, "HTTP Status. `%s\' is probably a broken 1.0 server that doesn't understand HEAD\n" _
HTHost_name(host));
return HT_ERROR;
} else {
HTResponse * response = HTRequest_response(request);
char * ptr = me->buffer+5; /* Skip the HTTP part */
char * vptr = NULL;
int major = 0;
int minor = 0;
me->version = vptr = HTNextField(&ptr);
if (vptr) {
major = (int) strtol(me->version, &vptr, 10);
if (vptr++) minor = strtol(vptr, NULL, 10);
}
/* Here we want to find out when to use persistent connection */
if (major > 1 && major < 100) {
HTTRACE(PROT_TRACE, "HTTP Status. Major version number is %d\n" _ major);
me->target = HTErrorStream();
me->status = 9999;
HTTPNextState(me); /* Get next state */
return HT_ERROR;
} else if (minor <= 0) {
if (major > 100) {
HTTRACE(PROT_TRACE, "HTTP Status. This is a *BROKEN* HTTP/1.0 server\n");
me->status = 200;
} else {
HTTRACE(PROT_TRACE, "HTTP Status. This is an HTTP/1.0 server\n");
me->status = atoi(HTNextField(&ptr));
}
HTHost_setVersion(host, HTTP_10);
} else { /* 1.x, x>0 family */
HTHost_setVersion(host, HTTP_11); /* Best we can do */
if (ConnectionMode & HTTP_11_NO_PIPELINING) {
HTTRACE(PROT_TRACE, "HTTP........ Mode is HTTP/1.1 with NO PIPELINING\n");
HTNet_setPersistent(net, YES, HT_TP_SINGLE);
} else if (ConnectionMode & HTTP_11_MUX) {
HTTRACE(PROT_TRACE, "HTTP........ Mode is HTTP/1.1 with MUXING\n");
HTNet_setPersistent(net, YES, HT_TP_INTERLEAVE);
} else if (ConnectionMode & HTTP_FORCE_10) {
HTTRACE(PROT_TRACE, "HTTP........ Mode is FORCE HTTP/1.0\n");
HTHost_setVersion(host, HTTP_10);
HTNet_setPersistent(net, NO, HT_TP_SINGLE);
} else
HTNet_setPersistent(net, YES, HT_TP_PIPELINE);
me->status = atoi(HTNextField(&ptr));
}
me->reason = ptr;
if ((ptr = strchr(me->reason, '\r')) != NULL) /* Strip \r and \n */
*ptr = '\0';
else if ((ptr = strchr(me->reason, '\n')) != NULL)
*ptr = '\0';
/*
** If it is a 1xx code then find out what to do and return until we
** get the next code. In the case of Upgrade we may not get back here
** at all. If we are uploading an entity then continue doing that
*/
if (me->status/100 == 1) {
if (HTTPInformation(me) == YES) {
if (me->status==100) {
me->buflen = 0;
me->state = EOL_BEGIN;
if (me->info_target) (*me->info_target->isa->_free)(me->info_target);
me->info_target = HTStreamStack(WWW_MIME_CONT,
HTRequest_debugFormat(request),
HTRequest_debugStream(request),
request, NO);
if (length > 0) HTHost_setConsumed(host, length);
return HT_OK;
} else if (me->status==101) {
if (me->info_target) (*me->info_target->isa->_free)(me->info_target);
me->target = HTStreamStack(WWW_MIME_UPGRADE,
HTRequest_outputFormat(request),
HTRequest_outputStream(request),
request, NO);
if (length > 0) HTHost_setConsumed(host, length);
me->transparent = YES;
return HT_OK;
}
}
}
/* 2000/Oct/27 JK: copying the current reason info into the
response object. */
HTResponse_setReason (response, me->reason);
/*
** As we are getting fresh metainformation in the HTTP response,
** we clear the old metainfomation in order not to mix it with the new
** one. This is particularly important for the content-length and the
** like. The TRACE and OPTIONS method just adds to the current
** metainformation so in that case we don't clear the anchor.
*/
if (me->status==200 || me->status==203 || me->status==300) {
/*
** 200, 203 and 300 are all fully cacheable responses. No byte
** ranges or anything else make life hard in this case.
*/
HTAnchor_clearHeader(HTRequest_anchor(request));
HTResponse_setCachable(response, HT_CACHE_ALL);
me->target = HTStreamStack(WWW_MIME,
HTRequest_outputFormat(request),
HTRequest_outputStream(request),
request, NO);
} else if (me->status==204) {
HTResponse_setCachable(response, HT_CACHE_ALL);
me->target = HTStreamStack(WWW_MIME_HEAD,
HTRequest_debugFormat(request),
HTRequest_debugStream(request),
request, NO);
} else if (me->status==206) {
/*
** We got a partial response and now we must check whether
** we issued a cache If-Range request or it was a new
** partial response which we don't have in cache. In the latter
** case, we don't cache the object and in the former we append
** the result to the already existing cache entry.
*/
HTReload reload = HTRequest_reloadMode(request);
if (reload == HT_CACHE_RANGE_VALIDATE) {
HTResponse_setCachable(response, HT_CACHE_ALL);
me->target = HTStreamStack(WWW_MIME_PART,
HTRequest_outputFormat(request),
HTRequest_outputStream(request),
request, NO);
} else {
HTAnchor_clearHeader(HTRequest_anchor(request));
me->target = HTStreamStack(WWW_MIME,
HTRequest_outputFormat(request),
HTRequest_outputStream(request),
request, NO);
}
} else if (me->status==304) {
HTResponse_setCachable(response, HT_CACHE_NOT_MODIFIED);
me->target = HTStreamStack(WWW_MIME_HEAD,
HTRequest_debugFormat(request),
HTRequest_debugStream(request),
request, NO);
} else if (HTRequest_debugStream(request)) {
HTResponse_setCachable(response,
(me->status == 201) ? HT_CACHE_ETAG : HT_NO_CACHE);
me->target = HTStreamStack(WWW_MIME,
HTRequest_debugFormat(request),
HTRequest_debugStream(request),
request, NO);
} else {
/*
** We still need to parse the MIME part in order to find any
** valuable meta information which is needed from the response.
*/
HTResponse_setCachable(response,
(me->status == 201) ? HT_CACHE_ETAG : HT_NO_CACHE);
me->target = HTStreamStack(WWW_MIME,
HTRequest_debugFormat(request),
HTRequest_debugStream(request),
request, NO);
}
}
if (!me->target) me->target = HTErrorStream();
HTTPNextState(me); /* Get next state */
me->transparent = YES;
if (length > 0) HTHost_setConsumed(HTNet_host(HTRequest_net(me->request)), length);
return HT_OK;
}
/*
** Searches for HTTP header line until buffer fills up or a CRLF or LF
** is found
*/
PRIVATE int HTTPStatus_put_block (HTStream * me, const char * b, int l)
{
int status = HT_OK;
int length = l;
me->startLen = me->buflen;
while (!me->transparent && l-- > 0) {
if (me->info_target) {
/* Put data down the 1xx return code parser until we are done. */
status = (*me->info_target->isa->put_block)(me->info_target, b, l+1);
if (status != HT_CONTINUE) return status;
/* Now free the info stream */
(*me->info_target->isa->_free)(me->info_target);
me->info_target = NULL;
/* Update where we are in the stream */
l = HTHost_remainingRead(HTNet_host(HTRequest_net(me->request)));
b += (length-l);
length = l;
if (l <= 0) break;
} else {
*(me->buffer+me->buflen++) = *b;
if (me->state == EOL_FCR) {
if (*b == LF) { /* Line found */
if ((status = stream_pipe(me, length-l)) != HT_OK) return status;
} else {
me->state = EOL_BEGIN;
}
} else if (*b == CR) {
me->state = EOL_FCR;
} else if (*b == LF) {
if ((status = stream_pipe(me, length-l)) != HT_OK) return status;
} else {
if (me->buflen >= MAX_STATUS_LEN) {
if ((status = stream_pipe(me, length-l)) != HT_OK) return status;
}
}
b++;
}
}
if (!me->transparent && length != l)
HTHost_setConsumed(HTNet_host(HTRequest_net(me->request)), length-l);
if (l > 0) return PUTBLOCK(b, l);
return status;
}
PRIVATE int HTTPStatus_put_string (HTStream * me, const char * s)
{
return HTTPStatus_put_block(me, s, (int) strlen(s));
}
PRIVATE int HTTPStatus_put_character (HTStream * me, char c)
{
return HTTPStatus_put_block(me, &c, 1);
}
PRIVATE int HTTPStatus_flush (HTStream * me)
{
return (*me->target->isa->flush)(me->target);
}
PRIVATE int HTTPStatus_free (HTStream * me)
{
int status = HT_OK;
if (me->target) {
if ((status = (*me->target->isa->_free)(me->target))==HT_WOULD_BLOCK)
return HT_WOULD_BLOCK;
}
HT_FREE(me);
return status;
}
PRIVATE int HTTPStatus_abort (HTStream * me, HTList * e)
{
if (me->target)
ABORT_TARGET;
HT_FREE(me);
HTTRACE(PROT_TRACE, "HTTPStatus.. ABORTING...\n");
return HT_ERROR;
}
/* HTTPStatus Stream
** -----------------
*/
PRIVATE const HTStreamClass HTTPStatusClass =
{
"HTTPStatus",
HTTPStatus_flush,
HTTPStatus_free,
HTTPStatus_abort,
HTTPStatus_put_character,
HTTPStatus_put_string,
HTTPStatus_put_block
};
PUBLIC HTStream * HTTPStatus_new (HTRequest * request,
void * param,
HTFormat input_format,
HTFormat output_format,
HTStream * output_stream)
{
HTStream * me;
if ((me = (HTStream *) HT_CALLOC(1, sizeof(HTStream))) == NULL)
HT_OUTOFMEM("HTTPStatus_new");
me->isa = &HTTPStatusClass;
if (request) {
HTNet * net = HTRequest_net(request);
/* Get existing copy */
http_info * http = (http_info *) HTNet_context(net);
me->request = request;
me->http = http;
http->next = HTTP_ERROR;
me->state = EOL_BEGIN;
return me;
} else
return HTErrorStream();
}
/* ------------------------------------------------------------------------- */
/* Load Document from HTTP Server HTLoadHTTP
** ==============================
**
** Given a hypertext address, this routine loads a document.
**
** On entry,
** request This is the request structure
** returns HT_ERROR Error has occured in call back
** HT_OK Call back was OK
*/
PRIVATE int HTTPEvent (SOCKET soc, void * pVoid, HTEventType type);
PUBLIC int HTLoadHTTP (SOCKET soc, HTRequest * request)
{
http_info *http; /* Specific protocol information */
HTParentAnchor *anchor = HTRequest_anchor(request);
HTNet * net = HTRequest_net(request);
/*
** Initiate a new http structure and bind to request structure
** This is actually state HTTP_BEGIN, but it can't be in the state
** machine as we need the structure first.
*/
HTTRACE(PROT_TRACE, "HTTP........ Looking for `%s\'\n" _
HTAnchor_physical(anchor));
if ((http = (http_info *) HT_CALLOC(1, sizeof(http_info))) == NULL)
HT_OUTOFMEM("HTLoadHTTP");
http->net = net;
http->request = request;
HTNet_setContext(net, http);
HTNet_setEventCallback(net, HTTPEvent);
HTNet_setEventParam(net, http); /* callbacks get http* */
return HTTPEvent(soc, http, HTEvent_BEGIN); /* get it started - ops is ignored */
}
PRIVATE int FlushPutEvent (HTTimer * timer, void * param, HTEventType type)
{
http_info * http = (http_info *) param;
HTStream * input = HTRequest_inputStream(http->request);
HTPostCallback * pcbf = HTRequest_postCallback(http->request);
int status = HT_ERROR;
http->usedTimer = YES;
if (timer != http->timer)
HTDEBUGBREAK("HTTP timer %p not in sync\n" _ timer);
HTTRACE(PROT_TRACE, "Uploading... Flushing %p with timer %p\n" _ http _ timer);
/*
** Call the callback that will provide the data to save
** If the callback returns HT_OK then call it again until
** it returns something else than HT_OK.
*/
if (http && input && pcbf) {
status = (*pcbf)(http->request, input);
HTTRACE(PROT_TRACE, "Uploading... Callback returned %d\n" _ status);
}
/*
** If the callback returned something else than HT_OK then delete
** the timer, otherwise update it to a much shorter expiration
** time so that we can write some more data to the net.
*/
if (status != HT_OK) {
HTTimer_delete(http->timer);
http->timer = NULL;
} else if (!http->repetitive_writing) {
http->timer = HTTimer_new(NULL, FlushPutEvent, http, HTRepeatWrite, YES, YES);
http->repetitive_writing = YES;
}
return HT_OK;
}
PRIVATE int HTTPEvent (SOCKET soc, void * pVoid, HTEventType type)
{
http_info * http = (http_info *)pVoid;
int status = HT_ERROR;
HTNet * net = http->net;
HTRequest * request = HTNet_request(net);
HTParentAnchor * anchor = HTRequest_anchor(request);
HTHost * host = HTNet_host(net);
/*
** Check whether we have been interrupted or timed out
*/
if (type == HTEvent_BEGIN) {
http->next = HTTP_OK;
http->result = HT_ERROR;
} else if (type == HTEvent_CLOSE) {
long read_len = HTNet_bytesRead(net);
long doc_len = HTAnchor_length(anchor);
/*
** It is OK to get a close if a) we don't pipeline and b)
** we have the expected amount of data, and c) we haven't
** recieved a 100 Continue code. In case we don't
** know how much data to expect, we must accept it asis.
*/
if (HTHost_numberOfOutstandingNetObjects(host) == 1 &&
http->result != HT_CONTINUE && (doc_len<0 || doc_len==read_len)) {
HTTPCleanup(request, http->result); /* Raffaele Sena: was HT_LOADED */
} else {
HTRequest_addError(request, ERR_FATAL, NO, HTERR_INTERRUPTED,
NULL, 0, "HTLoadHTTP");
HTTPCleanup(request, HT_INTERRUPTED);
}
return HT_OK;
} else if (type == HTEvent_TIMEOUT) {
HTRequest_addError(request, ERR_FATAL, NO, HTERR_TIME_OUT,
NULL, 0, "HTLoadHTTP");
HTTPCleanup(request, HT_TIMEOUT);
return HT_OK;
} else if (type == HTEvent_END) {
HTTPCleanup(request, http->result);
return HT_OK;
} else if (type == HTEvent_RESET) {
HTTPCleanup(request, HT_RECOVER_PIPE);
http->state = HTTP_BEGIN;
return HT_OK;
}
/* Now jump into the machine. We know the state from the previous run */
while (1) {
switch (http->state) {
case HTTP_BEGIN:
status = HTHost_connect(host, net, HTAnchor_physical(anchor));
host = HTNet_host(net);
if (status == HT_OK) {
/*
** Check the protocol class to see if we have connected to a
** the right class of server, in this case HTTP. If we don't
** know the server then assume a HTTP/1.0
*/
{
char * s_class = HTHost_class(host);
if (!s_class) {
if (HTRequest_proxy(request) == NULL) {
HTAssocList * alist = HTRequest_connection(request);
if (!(alist && HTAssocList_findObject(alist, "close")))
HTRequest_addConnection(request, "Keep-Alive", "");
}
HTHost_setClass(host, "http");
} else if (strcasecomp(s_class, "http")) {
HTRequest_addError(request, ERR_FATAL, NO, HTERR_CLASS,
NULL, 0, "HTLoadHTTP");
http->state = HTTP_ERROR;
break;
}
}
if (ConnectionMode & HTTP_11_NO_PIPELINING) {
HTTRACE(PROT_TRACE, "HTTP........ Mode is HTTP/1.1 WITH NO PIPELINING\n");
HTRequest_setFlush(request, YES);
} else if (ConnectionMode & HTTP_FORCE_10) {
HTTRACE(PROT_TRACE, "HTTP........ Mode is FORCE HTTP/1.0\n");
HTHost_setVersion(host, HTTP_10);
}
if (HTNet_preemptive(net)) {
HTTRACE(PROT_TRACE, "HTTP........ Force flush on preemptive load\n");
HTRequest_setFlush(request, YES);
}
/* Jump to next state */
http->state = HTTP_NEED_STREAM;
} else if (status == HT_WOULD_BLOCK || status == HT_PENDING) {
return HT_OK;
} else if (status == HT_NO_HOST) {
http->result = HT_NO_HOST;
http->state = HTTP_ERROR;
} else
http->state = HTTP_ERROR; /* Error or interrupt */
break;
case HTTP_NEED_STREAM:
/*
** Create the stream pipe FROM the channel to the application.
** The target for the input stream pipe is set up using the
** stream stack.
*/
{
/*
** during a recovery, we might keep the same HTNet object.
** if so, reuse it's read stream
*/
HTStream * me = HTNet_readStream( net );
if ( me == NULL ) {
me = HTStreamStack(WWW_HTTP,
HTRequest_outputFormat(request),
HTRequest_outputStream(request),
request, YES);
#ifdef HTDEBUG
if (PROT_TRACE) {
if (!htfp) htfp = fopen(HTTP_OUTPUT, "ab");
if (htfp) {
me = HTTee(me, HTFWriter_new(request, htfp, YES), NULL);
HTTRACE(PROT_TRACE, "HTTP........ Dumping response to `%s\'\n" _ HTTP_OUTPUT);
}
}
#endif /* HTDEBUG */
HTNet_setReadStream(net, me);
}
HTRequest_setOutputConnected(request, YES);
}
/*
** Create the stream pipe TO the channel from the application
** and hook it up to the request object
*/
{
HTChannel * channel = HTHost_channel(host);
HTOutputStream * output = HTChannel_getChannelOStream(channel);
int version = HTHost_version(host);
HTStream * app = NULL;
#ifdef HTDEBUG
if (PROT_TRACE) {
if (!htfp) htfp = fopen(HTTP_OUTPUT, "ab");
if (htfp) {
output = (HTOutputStream *)
HTTee((HTStream *) output, HTFWriter_new(request, htfp, YES), NULL);
HTTRACE(PROT_TRACE, "HTTP........ Dumping request to `%s\'\n" _ HTTP_OUTPUT);
}
}
#endif /* HTDEBUG */
app = HTMethod_hasEntity(HTRequest_method(request)) ?
HTMIMERequest_new(request,
HTTPRequest_new(request, (HTStream *) output, NO,
version),
YES) :
HTTPRequest_new(request, (HTStream *) output, YES, version);
HTRequest_setInputStream(request, app);
}
/*
** Set up concurrent read/write if this request isn't the
** source for a PUT or POST. As source we don't start reading
** before all destinations are ready. If destination then
** register the input stream and get ready for read
*/
if (HTRequest_isDestination(request)) {
HTHost_register(host, net, HTEvent_READ);
HTRequest_linkDestination(request);
}
http->state = HTTP_CONNECTED;
type = HTEvent_WRITE; /* fresh, so try a write */
break;
/* As we can do simultanous read and write this is now one state */
case HTTP_CONNECTED:
if (type == HTEvent_WRITE) {
HTStream * input = HTRequest_inputStream(request);
HTPostCallback * pcbf = HTRequest_postCallback(request);
status = HTRequest_flush(request) ?
HTHost_forceFlush(host) : (*input->isa->flush)(input);
/*
** Check to see if we are uploading something or just a normal
** GET kind of thing.
*/
/*
** JK: don't continue sending things thru the network
** if the flush resulted in an error or if the connection
** is closed
*/
if ((status != HT_ERROR) && status != HT_CLOSED) {
if (pcbf) {
if (http->lock == NO) {
int retrys = HTRequest_retrys(request);
ms_t delay = retrys > 3 ? HTSecondWriteDelay : HTFirstWriteDelay;
if (!http->timer && !http->usedTimer) {
http->timer = HTTimer_new(NULL, FlushPutEvent,
http, delay, YES, NO);
HTTRACE(PROT_TRACE, "Uploading... Holding %p for %lu ms using time %p\n" _
http _ delay _ http->timer);
HTHost_register(host, net, HTEvent_READ);
}
http->lock = YES;
}
type = HTEvent_READ;
} else {
/*
** Check to see if we can start a new request
** pending in the host object.
*/
HTHost_launchPending(host);
type = HTEvent_READ;
}
}
/* Now check the status code */
if (status == HT_WOULD_BLOCK)
return HT_OK;
else if (status == HT_PAUSE || status == HT_LOADED) {
type = HTEvent_READ;
} else if (status==HT_ERROR)
http->state = HTTP_RECOVER_PIPE;
} else if (type == HTEvent_FLUSH) {
HTStream * input = HTRequest_inputStream(request);
if (input == NULL)
return HT_ERROR;
return (*input->isa->flush)(input);
} else if (type == HTEvent_READ) {
status = HTHost_read(host, net);
if (status == HT_WOULD_BLOCK)
return HT_OK;
else if (status == HT_CONTINUE) {
HTTRACE(PROT_TRACE, "HTTP........ Continuing\n");
http->lock = NO;
continue;
} else if (status==HT_LOADED)
http->state = http->next; /* Jump to next state (OK or ERROR) */
else if (status==HT_CLOSED)
http->state = HTTP_RECOVER_PIPE;
else if (status == HT_ERROR)
http->state = HTTP_KILL_PIPE;
else
http->state = HTTP_ERROR;
} else {
http->state = HTTP_ERROR; /* don't know how to handle OOB */
}
break;
case HTTP_OK:
HTTPCleanup(request, http->result);
return HT_OK;
break;
case HTTP_RECOVER_PIPE:
{
/*
** If this is a persistent connection and we get a close
** then it is an error and we should recover from it by
** restarting the pipe line of requests if any
*/
if (HTHost_isPersistent(host) && !HTHost_closeNotification(host)) {
if (host == NULL) return HT_ERROR;
HTRequest_setFlush(request, YES);
/*
** If we already have recovered more than we want and
** this call returns NO then simply kill the pipe.
** Otherwise we may loop forever.
*/
if (HTHost_recoverPipe(host) != YES) {
HTRequest_addError(request, ERR_FATAL, NO, HTERR_BAD_REPLY,
NULL, 0, "HTTPEvent");
http->state = HTTP_KILL_PIPE;
break;
}
return HT_OK;
} else
http->state = HTTP_OK;
}
break;
case HTTP_KILL_PIPE:
if (host == NULL) return HT_ERROR;
HTHost_killPipe(host);
return HT_OK;
break;
case HTTP_ERROR:
HTTPCleanup(request, http->result);
return HT_OK;
break;
default:
HTDEBUGBREAK("Bad http state %d\n" _ http->state);
}
} /* End of while(1) */
}
PUBLIC void HTTP_setConnectionMode (HTTPConnectionMode mode)
{
ConnectionMode = mode;
}
PUBLIC HTTPConnectionMode HTTP_connectionMode (void)
{
return ConnectionMode;
}
PUBLIC BOOL HTTP_setBodyWriteDelay (ms_t first_try, ms_t second_try)
{
if (first_try > 20 && second_try >= first_try) {
HTFirstWriteDelay = first_try;
HTSecondWriteDelay = second_try;
return YES;
}
return NO;
}
PUBLIC void HTTP_bodyWriteDelay (ms_t * first_try, ms_t * second_try)
{
*first_try = HTFirstWriteDelay;
*second_try = HTSecondWriteDelay;
}
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