src/HttpRequest.cc

   1
   2 /*
   3  * $Id: HttpRequest.cc,v 1.18 1998/08/14 09:22:31 wessels Exp $
   4  *
   5  * DEBUG: section 73    HTTP Request
   6  * AUTHOR: Duane Wessels
   7  *
   8  * SQUID Internet Object Cache  http://squid.nlanr.net/Squid/
   9  * ----------------------------------------------------------
  10  *
  11  *  Squid is the result of efforts by numerous individuals from the
  12  *  Internet community.  Development is led by Duane Wessels of the
  13  *  National Laboratory for Applied Network Research and funded by the
  14  *  National Science Foundation.  Squid is Copyrighted (C) 1998 by
  15  *  Duane Wessels and the University of California San Diego.  Please
  16  *  see the COPYRIGHT file for full details.  Squid incorporates
  17  *  software developed and/or copyrighted by other sources.  Please see
  18  *  the CREDITS file for full details.
  19  *
  20  *  This program is free software; you can redistribute it and/or modify
  21  *  it under the terms of the GNU General Public License as published by
  22  *  the Free Software Foundation; either version 2 of the License, or
  23  *  (at your option) any later version.
  24  *
  25  *  This program is distributed in the hope that it will be useful,
  26  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  27  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  28  *  GNU General Public License for more details.
  29  *
  30  *  You should have received a copy of the GNU General Public License
  31  *  along with this program; if not, write to the Free Software
  32  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
  33  *
  34  */
  35
  36 #include "squid.h"
  37
  38 request_t *
  39 requestCreate(method_t method, protocol_t protocol, const char *urlpath)
  40 {
  41     request_t *req = memAllocate(MEM_REQUEST_T);
  42     req->method = method;
  43     req->protocol = protocol;
  44     if (urlpath)
  45         stringReset(&req->urlpath, urlpath);
  46     req->max_age = -1;
  47     req->max_forwards = -1;
  48 #if DELAY_POOLS
  49     req->delay_id = 0;
  50 #endif
  51     httpHeaderInit(&req->header, hoRequest);
  52     return req;
  53 }
  54
  55 void
  56 requestDestroy(request_t * req)
  57 {
  58     assert(req);
  59     safe_free(req->body);
  60     safe_free(req->canonical);
  61     stringClean(&req->urlpath);
  62     httpHeaderClean(&req->header);
  63     if (req->cache_control)
  64         httpHdrCcDestroy(req->cache_control);
  65     if (req->range)
  66         httpHdrRangeDestroy(req->range);
  67     memFree(MEM_REQUEST_T, req);
  68 }
  69
  70 request_t *
  71 requestLink(request_t * request)
  72 {
  73     assert(request);
  74     request->link_count++;
  75     return request;
  76 }
  77
  78 void
  79 requestUnlink(request_t * request)
  80 {
  81     if (!request)
  82         return;
  83     assert(request->link_count > 0);
  84     if (--request->link_count > 0)
  85         return;
  86     requestDestroy(request);
  87 }
  88
  89 int
  90 httpRequestParseHeader(request_t * req, const char *parse_start)
  91 {
  92     const char *blk_start, *blk_end;
  93     if (!httpMsgIsolateHeaders(&parse_start, &blk_start, &blk_end))
  94         return 0;
  95     return httpHeaderParse(&req->header, blk_start, blk_end);
  96 }
  97
  98 /* swaps out request using httpRequestPack */
  99 void
 100 httpRequestSwapOut(const request_t * req, StoreEntry * e)
 101 {
 102     Packer p;
 103     assert(req && e);
 104     packerToStoreInit(&p, e);
 105     httpRequestPack(req, &p);
 106     packerClean(&p);
 107 }
 108
 109 /* packs request-line and headers, appends <crlf> terminator */
 110 void
 111 httpRequestPack(const request_t * req, Packer * p)
 112 {
 113     assert(req && p);
 114     /* pack request-line */
 115     packerPrintf(p, "%s %s HTTP/1.0\r\n",
 116         RequestMethodStr[req->method], strBuf(req->urlpath));
 117     /* headers */
 118     httpHeaderPackInto(&req->header, p);
 119     /* trailer */
 120     packerAppend(p, "\r\n", 2);
 121 }
 122
 123 #if UNUSED_CODE
 124 void
 125 httpRequestSetHeaders(request_t * req, method_t method, const char *uri, const char *header_str)
 126 {
 127     assert(req && uri && header_str);
 128     assert(!req->header.len);
 129     httpHeaderParse(&req->header, header_str, header_str + strlen(header_str));
 130 }
 131
 132 #endif
 133
 134 /* returns the length of request line + headers + crlf */
 135 int
 136 httpRequestPrefixLen(const request_t * req)
 137 {
 138     assert(req);
 139     return strlen(RequestMethodStr[req->method]) + 1 +
 140         strLen(req->urlpath) + 1 +
 141         4 + 1 + 3 + 2 +
 142         req->header.len + 2;
 143 }
 144
 145 /* returns true if header is allowed to be passed on */
 146 int
 147 httpRequestHdrAllowed(const HttpHeaderEntry * e, String * strConn)
 148 {
 149     assert(e);
 150     /* check connection header first */
 151     if (strConn && strListIsMember(strConn, strBuf(e->name), ','))
 152         return 0;
 153     /* check with anonymizer tables */
 154     if (Config.onoff.anonymizer == ANONYMIZER_PARANOID) {
 155         return httpAnonHdrAllowed(e->id);
 156     } else if (Config.onoff.anonymizer == ANONYMIZER_STANDARD) {
 157         return !httpAnonHdrDenied(e->id);
 158     }
 159     return 1;
 160 }