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-old.h"
  37 #include "CacheManager.h"
  38 #include "comm/Connection.h"
  39 #include "errorpage.h"
  40 #include "Store.h"
  41 #include "HttpRequest.h"
  42 #include "HttpReply.h"
  43 #include "MemBuf.h"
  44 #include "SquidTime.h"
  45 #include "wordlist.h"
  46 #include "icmp/net_db.h"
  47
  48 /* called when we "miss" on an internal object;
  49  * generate known dynamic objects,
  50  * return HTTP_NOT_FOUND for others
  51  */
  52 void
  53 internalStart(const Comm::ConnectionPointer &clientConn, HttpRequest * request, StoreEntry * entry)
  54 {
  55     ErrorState *err;
  56     const char *upath = request->urlpath.termedBuf();
  57     debugs(76, 3, HERE << clientConn << " requesting '" << upath << "'");
  58
  59     if (0 == strcmp(upath, "/squid-internal-dynamic/netdb")) {
  60         netdbBinaryExchange(entry);
  61     } else if (0 == strcmp(upath, "/squid-internal-periodic/store_digest")) {
  62 #if USE_CACHE_DIGESTS
  63         const char *msgbuf = "This cache is currently building its digest.\n";
  64 #else
  65
  66         const char *msgbuf = "This cache does not support Cache Digests.\n";
  67 #endif
  68
  69         HttpReply *reply = new HttpReply;
  70         reply->setHeaders(HTTP_NOT_FOUND, "Not Found", "text/plain", strlen(msgbuf), squid_curtime, -2);
  71         entry->replaceHttpReply(reply);
  72         entry->append(msgbuf, strlen(msgbuf));
  73         entry->complete();
  74     } else if (0 == strncmp(upath, "/squid-internal-mgr/", 20)) {
  75         CacheManager::GetInstance()->Start(clientConn, request, entry);
  76     } else {
  77         debugObj(76, 1, "internalStart: unknown request:\n",
  78                  request, (ObjPackMethod) & httpRequestPack);
  79         err = new ErrorState(ERR_INVALID_REQ, HTTP_NOT_FOUND, request);
  80         errorAppendEntry(entry, err);
  81     }
  82 }
  83
  84 int
  85 internalCheck(const char *urlpath)
  86 {
  87     return (0 == strncmp(urlpath, "/squid-internal-", 16));
  88 }
  89
  90 int
  91 internalStaticCheck(const char *urlpath)
  92 {
  93     return (0 == strncmp(urlpath, "/squid-internal-static", 22));
  94 }
  95
  96 /*
  97  * makes internal url with a given host and port (remote internal url)
  98  */
  99 char *
 100 internalRemoteUri(const char *host, unsigned short port, const char *dir, const char *name)
 101 {
 102     static char lc_host[SQUIDHOSTNAMELEN];
 103     assert(host && name);
 104     /* convert host name to lower case */
 105     xstrncpy(lc_host, host, SQUIDHOSTNAMELEN);
 106     Tolower(lc_host);
 107
 108     /* check for an IP address and format appropriately if found */
 109     Ip::Address test = lc_host;
 110     if ( !test.IsAnyAddr() ) {
 111         test.ToHostname(lc_host,SQUIDHOSTNAMELEN);
 112     }
 113
 114     /*
 115      * append the domain in order to mirror the requests with appended
 116      * domains
 117      */
 118
 119     /* For IPv6 addresses also check for a colon */
 120     if (Config.appendDomain && !strchr(lc_host, '.') && !strchr(lc_host, ':'))
 121         strncat(lc_host, Config.appendDomain, SQUIDHOSTNAMELEN -
 122                 strlen(lc_host) - 1);
 123
 124     /* build uri in mb */
 125     static MemBuf mb;
 126
 127     mb.reset();
 128
 129     mb.Printf("http://%s", lc_host);
 130
 131     /* append port if not default */
 132     if (port && port != urlDefaultPort(AnyP::PROTO_HTTP))
 133         mb.Printf(":%d", port);
 134
 135     if (dir)
 136         mb.Printf("%s", dir);
 137
 138     mb.Printf("%s", name);
 139
 140     /* return a pointer to a local static buffer */
 141     return mb.buf;
 142 }
 143
 144 /*
 145  * makes internal url with local host and port
 146  */
 147 char *
 148 internalLocalUri(const char *dir, const char *name)
 149 {
 150     return internalRemoteUri(getMyHostname(),
 151                              getMyPort(), dir, name);
 152 }
 153
 154 const char *
 155 internalHostname(void)
 156 {
 157     LOCAL_ARRAY(char, host, SQUIDHOSTNAMELEN + 1);
 158     xstrncpy(host, getMyHostname(), SQUIDHOSTNAMELEN);
 159
 160     /* For IPv6 addresses also check for a colon */
 161     if (Config.appendDomain && !strchr(host, '.') && !strchr(host, ':'))
 162         strncat(host, Config.appendDomain, SQUIDHOSTNAMELEN -
 163                 strlen(host) - 1);
 164
 165     Tolower(host);
 166
 167     return host;
 168 }
 169
 170 int
 171 internalHostnameIs(const char *arg)
 172 {
 173     wordlist *w;
 174
 175     if (0 == strcmp(arg, internalHostname()))
 176         return 1;
 177
 178     for (w = Config.hostnameAliases; w; w = w->next)
 179         if (0 == strcmp(arg, w->key))
 180             return 1;
 181
 182     return 0;
 183 }