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.buf();
  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         HttpVersion version(1, 0);
  68         HttpReply *reply = new HttpReply;
  69         reply->setHeaders(version,
  70                           HTTP_NOT_FOUND,
  71                           "Not Found",
  72                           "text/plain",
  73                           strlen(msgbuf),
  74                           squid_curtime,
  75                           -2);
  76         entry->replaceHttpReply(reply);
  77         entry->append(msgbuf, strlen(msgbuf));
  78         entry->complete();
  79     } else {
  80         debugObj(76, 1, "internalStart: unknown request:\n",
  81                  request, (ObjPackMethod) & httpRequestPack);
  82         err = errorCon(ERR_INVALID_REQ, HTTP_NOT_FOUND, request);
  83         errorAppendEntry(entry, err);
  84     }
  85 }
  86
  87 int
  88 internalCheck(const char *urlpath)
  89 {
  90     return (0 == strncmp(urlpath, "/squid-internal-", 16));
  91 }
  92
  93 int
  94 internalStaticCheck(const char *urlpath)
  95 {
  96     return (0 == strncmp(urlpath, "/squid-internal-static", 22));
  97 }
  98
  99 /*
 100  * makes internal url with a given host and port (remote internal url)
 101  */
 102 char *
 103 internalRemoteUri(const char *host, u_short port, const char *dir, const char *name)
 104 {
 105     static char lc_host[SQUIDHOSTNAMELEN];
 106     assert(host && name);
 107     /* convert host name to lower case */
 108     xstrncpy(lc_host, host, SQUIDHOSTNAMELEN);
 109     Tolower(lc_host);
 110
 111 #if USE_IPV6
 112     /* check for an IP address and format appropriately if found */
 113     IpAddress test = lc_host;
 114     if ( !test.IsAnyAddr() ) {
 115         test.ToHostname(lc_host,SQUIDHOSTNAMELEN);
 116     }
 117 #endif
 118
 119     /*
 120      * append the domain in order to mirror the requests with appended
 121      * domains
 122      */
 123
 124     if (Config.appendDomain && !strchr(lc_host, '.'))
 125         strncat(lc_host, Config.appendDomain, SQUIDHOSTNAMELEN -
 126                 strlen(lc_host) - 1);
 127
 128     /* build uri in mb */
 129     static MemBuf mb;
 130
 131     mb.reset();
 132
 133     mb.Printf("http://%s", lc_host);
 134
 135     /* append port if not default */
 136     if (port && port != urlDefaultPort(PROTO_HTTP))
 137         mb.Printf(":%d", port);
 138
 139     if (dir)
 140         mb.Printf("%s", dir);
 141
 142     mb.Printf("%s", name);
 143
 144     /* return a pointer to a local static buffer */
 145     return mb.buf;
 146 }
 147
 148 /*
 149  * makes internal url with local host and port
 150  */
 151 char *
 152 internalLocalUri(const char *dir, const char *name)
 153 {
 154     return internalRemoteUri(getMyHostname(),
 155                              getMyPort(), dir, name);
 156 }
 157
 158 const char *
 159 internalHostname(void)
 160 {
 161     LOCAL_ARRAY(char, host, SQUIDHOSTNAMELEN + 1);
 162     xstrncpy(host, getMyHostname(), SQUIDHOSTNAMELEN);
 163
 164     if (Config.appendDomain && !strchr(host, '.'))
 165         strncat(host, Config.appendDomain, SQUIDHOSTNAMELEN -
 166                 strlen(host) - 1);
 167
 168     Tolower(host);
 169
 170     return host;
 171 }
 172
 173 int
 174 internalHostnameIs(const char *arg)
 175 {
 176     wordlist *w;
 177
 178     if (0 == strcmp(arg, internalHostname()))
 179         return 1;
 180
 181     for (w = Config.hostnameAliases; w; w = w->next)
 182         if (0 == strcmp(arg, w->key))
 183             return 1;
 184
 185     return 0;
 186 }