src/internal.cc

   1
   2 /*
   3  * DEBUG: section 76    Internal Squid Object handling
   4  * AUTHOR: Duane, Alex, Henrik
   5  *
   6  * SQUID Web Proxy Cache          http://www.squid-cache.org/
   7  * ----------------------------------------------------------
   8  *
   9  *  Squid is the result of efforts by numerous individuals from
  10  *  the Internet community; see the CONTRIBUTORS file for full
  11  *  details.   Many organizations have provided support for Squid's
  12  *  development; see the SPONSORS file for full details.  Squid is
  13  *  Copyrighted (C) 2001 by the Regents of the University of
  14  *  California; see the COPYRIGHT file for full details.  Squid
  15  *  incorporates software developed and/or copyrighted by other
  16  *  sources; see the CREDITS file for full details.
  17  *
  18  *  This program is free software; you can redistribute it and/or modify
  19  *  it under the terms of the GNU General Public License as published by
  20  *  the Free Software Foundation; either version 2 of the License, or
  21  *  (at your option) any later version.
  22  *
  23  *  This program is distributed in the hope that it will be useful,
  24  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  25  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  26  *  GNU General Public License for more details.
  27  *
  28  *  You should have received a copy of the GNU General Public License
  29  *  along with this program; if not, write to the Free Software
  30  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
  31  *
  32  */
  33
  34 #include "squid.h"
  35 #include "CacheManager.h"
  36 #include "comm/Connection.h"
  37 #include "errorpage.h"
  38 #include "HttpReply.h"
  39 #include "HttpRequest.h"
  40 #include "icmp/net_db.h"
  41 #include "MemBuf.h"
  42 #include "SquidConfig.h"
  43 #include "SquidTime.h"
  44 #include "Store.h"
  45 #include "tools.h"
  46 #include "URL.h"
  47 #include "wordlist.h"
  48
  49 /* called when we "miss" on an internal object;
  50  * generate known dynamic objects,
  51  * return Http::scNotFound for others
  52  */
  53 void
  54 internalStart(const Comm::ConnectionPointer &clientConn, HttpRequest * request, StoreEntry * entry)
  55 {
  56     ErrorState *err;
  57     const char *upath = request->urlpath.termedBuf();
  58     debugs(76, 3, HERE << clientConn << " requesting '" << upath << "'");
  59
  60     if (0 == strcmp(upath, "/squid-internal-dynamic/netdb")) {
  61         netdbBinaryExchange(entry);
  62     } else if (0 == strcmp(upath, "/squid-internal-periodic/store_digest")) {
  63 #if USE_CACHE_DIGESTS
  64         const char *msgbuf = "This cache is currently building its digest.\n";
  65 #else
  66
  67         const char *msgbuf = "This cache does not support Cache Digests.\n";
  68 #endif
  69
  70         HttpReply *reply = new HttpReply;
  71         reply->setHeaders(Http::scNotFound, "Not Found", "text/plain", strlen(msgbuf), squid_curtime, -2);
  72         entry->replaceHttpReply(reply);
  73         entry->append(msgbuf, strlen(msgbuf));
  74         entry->complete();
  75     } else if (0 == strncmp(upath, "/squid-internal-mgr/", 20)) {
  76         debugs(17, 2, "calling CacheManager due to URL-path /squid-internal-mgr/");
  77         CacheManager::GetInstance()->Start(clientConn, request, entry);
  78     } else {
  79         debugObj(76, 1, "internalStart: unknown request:\n",
  80                  request, (ObjPackMethod) & httpRequestPack);
  81         err = new ErrorState(ERR_INVALID_REQ, Http::scNotFound, request);
  82         errorAppendEntry(entry, err);
  83     }
  84 }
  85
  86 int
  87 internalCheck(const char *urlpath)
  88 {
  89     return (0 == strncmp(urlpath, "/squid-internal-", 16));
  90 }
  91
  92 int
  93 internalStaticCheck(const char *urlpath)
  94 {
  95     return (0 == strncmp(urlpath, "/squid-internal-static", 22));
  96 }
  97
  98 /*
  99  * makes internal url with a given host and port (remote internal url)
 100  */
 101 char *
 102 internalRemoteUri(const char *host, unsigned short port, const char *dir, const char *name)
 103 {
 104     static char lc_host[SQUIDHOSTNAMELEN];
 105     assert(host && name);
 106     /* convert host name to lower case */
 107     xstrncpy(lc_host, host, SQUIDHOSTNAMELEN);
 108     Tolower(lc_host);
 109
 110     /* check for an IP address and format appropriately if found */
 111     Ip::Address test = lc_host;
 112     if ( !test.isAnyAddr() ) {
 113         test.toHostStr(lc_host,SQUIDHOSTNAMELEN);
 114     }
 115
 116     /*
 117      * append the domain in order to mirror the requests with appended
 118      * domains
 119      */
 120
 121     /* For IPv6 addresses also check for a colon */
 122     if (Config.appendDomain && !strchr(lc_host, '.') && !strchr(lc_host, ':'))
 123         strncat(lc_host, Config.appendDomain, SQUIDHOSTNAMELEN -
 124                 strlen(lc_host) - 1);
 125
 126     /* build uri in mb */
 127     static MemBuf mb;
 128
 129     mb.reset();
 130
 131     mb.Printf("http://%s", lc_host);
 132
 133     /* append port if not default */
 134     if (port && port != urlDefaultPort(AnyP::PROTO_HTTP))
 135         mb.Printf(":%d", port);
 136
 137     if (dir)
 138         mb.Printf("%s", dir);
 139
 140     mb.Printf("%s", name);
 141
 142     /* return a pointer to a local static buffer */
 143     return mb.buf;
 144 }
 145
 146 /*
 147  * makes internal url with local host and port
 148  */
 149 char *
 150 internalLocalUri(const char *dir, const char *name)
 151 {
 152     return internalRemoteUri(getMyHostname(),
 153                              getMyPort(), dir, name);
 154 }
 155
 156 const char *
 157 internalHostname(void)
 158 {
 159     LOCAL_ARRAY(char, host, SQUIDHOSTNAMELEN + 1);
 160     xstrncpy(host, getMyHostname(), SQUIDHOSTNAMELEN);
 161
 162     /* For IPv6 addresses also check for a colon */
 163     if (Config.appendDomain && !strchr(host, '.') && !strchr(host, ':'))
 164         strncat(host, Config.appendDomain, SQUIDHOSTNAMELEN -
 165                 strlen(host) - 1);
 166
 167     Tolower(host);
 168
 169     return host;
 170 }
 171
 172 int
 173 internalHostnameIs(const char *arg)
 174 {
 175     wordlist *w;
 176
 177     if (0 == strcmp(arg, internalHostname()))
 178         return 1;
 179
 180     for (w = Config.hostnameAliases; w; w = w->next)
 181         if (0 == strcmp(arg, w->key))
 182             return 1;
 183
 184     return 0;
 185 }