src/internal.cc

   1
   2 /*
   3  * $Id$
   4  *
   5  * DEBUG: section 76    Internal Squid Object handling
   6  * AUTHOR: Duane, Alex, Henrik
   7  *
   8  * SQUID Web Proxy Cache          http://www.squid-cache.org/
   9  * ----------------------------------------------------------
  10  *
  11  *  Squid is the result of efforts by numerous individuals from
  12  *  the Internet community; see the CONTRIBUTORS file for full
  13  *  details.   Many organizations have provided support for Squid's
  14  *  development; see the SPONSORS file for full details.  Squid is
  15  *  Copyrighted (C) 2001 by the Regents of the University of
  16  *  California; see the COPYRIGHT file for full details.  Squid
  17  *  incorporates software developed and/or copyrighted by other
  18  *  sources; see 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 #include "errorpage.h"
  38 #include "Store.h"
  39 #include "HttpRequest.h"
  40 #include "HttpReply.h"
  41 #include "MemBuf.h"
  42 #include "SquidTime.h"
  43 #include "wordlist.h"
  44 #include "icmp/net_db.h"
  45
  46 /* called when we "miss" on an internal object;
  47  * generate known dynamic objects,
  48  * return HTTP_NOT_FOUND for others
  49  */
  50 void
  51 internalStart(HttpRequest * request, StoreEntry * entry)
  52 {
  53     ErrorState *err;
  54     const char *upath = request->urlpath.termedBuf();
  55     debugs(76, 3, "internalStart: " << request->client_addr << " requesting '" << upath << "'");
  56
  57     if (0 == strcmp(upath, "/squid-internal-dynamic/netdb")) {
  58         netdbBinaryExchange(entry);
  59     } else if (0 == strcmp(upath, "/squid-internal-periodic/store_digest")) {
  60 #if USE_CACHE_DIGESTS
  61         const char *msgbuf = "This cache is currently building its digest.\n";
  62 #else
  63
  64         const char *msgbuf = "This cache does not support Cache Digests.\n";
  65 #endif
  66
  67         HttpReply *reply = new HttpReply;
  68         reply->setHeaders(HTTP_NOT_FOUND, "Not Found", "text/plain", strlen(msgbuf), squid_curtime, -2);
  69         entry->replaceHttpReply(reply);
  70         entry->append(msgbuf, strlen(msgbuf));
  71         entry->complete();
  72     } else {
  73         debugObj(76, 1, "internalStart: unknown request:\n",
  74                  request, (ObjPackMethod) & httpRequestPack);
  75         err = errorCon(ERR_INVALID_REQ, HTTP_NOT_FOUND, request);
  76         errorAppendEntry(entry, err);
  77     }
  78 }
  79
  80 int
  81 internalCheck(const char *urlpath)
  82 {
  83     return (0 == strncmp(urlpath, "/squid-internal-", 16));
  84 }
  85
  86 int
  87 internalStaticCheck(const char *urlpath)
  88 {
  89     return (0 == strncmp(urlpath, "/squid-internal-static", 22));
  90 }
  91
  92 /*
  93  * makes internal url with a given host and port (remote internal url)
  94  */
  95 char *
  96 internalRemoteUri(const char *host, u_short port, const char *dir, const char *name)
  97 {
  98     static char lc_host[SQUIDHOSTNAMELEN];
  99     assert(host && name);
 100     /* convert host name to lower case */
 101     xstrncpy(lc_host, host, SQUIDHOSTNAMELEN);
 102     Tolower(lc_host);
 103
 104     /* check for an IP address and format appropriately if found */
 105     Ip::Address test = lc_host;
 106     if ( !test.IsAnyAddr() ) {
 107         test.ToHostname(lc_host,SQUIDHOSTNAMELEN);
 108     }
 109
 110     /*
 111      * append the domain in order to mirror the requests with appended
 112      * domains
 113      */
 114
 115     /* For IPv6 addresses also check for a colon */
 116     if (Config.appendDomain && !strchr(lc_host, '.') && !strchr(lc_host, ':'))
 117         strncat(lc_host, Config.appendDomain, SQUIDHOSTNAMELEN -
 118                 strlen(lc_host) - 1);
 119
 120     /* build uri in mb */
 121     static MemBuf mb;
 122
 123     mb.reset();
 124
 125     mb.Printf("http://%s", lc_host);
 126
 127     /* append port if not default */
 128     if (port && port != urlDefaultPort(AnyP::PROTO_HTTP))
 129         mb.Printf(":%d", port);
 130
 131     if (dir)
 132         mb.Printf("%s", dir);
 133
 134     mb.Printf("%s", name);
 135
 136     /* return a pointer to a local static buffer */
 137     return mb.buf;
 138 }
 139
 140 /*
 141  * makes internal url with local host and port
 142  */
 143 char *
 144 internalLocalUri(const char *dir, const char *name)
 145 {
 146     return internalRemoteUri(getMyHostname(),
 147                              getMyPort(), dir, name);
 148 }
 149
 150 const char *
 151 internalHostname(void)
 152 {
 153     LOCAL_ARRAY(char, host, SQUIDHOSTNAMELEN + 1);
 154     xstrncpy(host, getMyHostname(), SQUIDHOSTNAMELEN);
 155
 156     /* For IPv6 addresses also check for a colon */
 157     if (Config.appendDomain && !strchr(host, '.') && !strchr(host, ':'))
 158         strncat(host, Config.appendDomain, SQUIDHOSTNAMELEN -
 159                 strlen(host) - 1);
 160
 161     Tolower(host);
 162
 163     return host;
 164 }
 165
 166 int
 167 internalHostnameIs(const char *arg)
 168 {
 169     wordlist *w;
 170
 171     if (0 == strcmp(arg, internalHostname()))
 172         return 1;
 173
 174     for (w = Config.hostnameAliases; w; w = w->next)
 175         if (0 == strcmp(arg, w->key))
 176             return 1;
 177
 178     return 0;
 179 }