src/acl/HttpStatus.cc

   1 /*
   2  * Copyright (C) 1996-2014 The Squid Software Foundation and contributors
   3  *
   4  * Squid software is distributed under GPLv2+ license and includes
   5  * contributions from numerous individuals and organizations.
   6  * Please see the COPYING and CONTRIBUTORS files for details.
   7  */
   8
   9 /* DEBUG: section 28    Access Control */
  10
  11 #include "squid.h"
  12 #include "acl/FilledChecklist.h"
  13 #include "acl/HttpStatus.h"
  14 #include "cache_cf.h"
  15 #include "Debug.h"
  16 #include "HttpReply.h"
  17
  18 #include <climits>
  19
  20 static void aclParseHTTPStatusList(Splay<acl_httpstatus_data *> **curlist);
  21 static int aclHTTPStatusCompare(acl_httpstatus_data * const &a, acl_httpstatus_data * const &b);
  22 static int aclMatchHTTPStatus(Splay<acl_httpstatus_data*> **dataptr, Http::StatusCode status);
  23
  24 acl_httpstatus_data::acl_httpstatus_data(int x) : status1(x), status2(x) { ; }
  25
  26 acl_httpstatus_data::acl_httpstatus_data(int x, int y) : status1(x), status2(y) { ; }
  27
  28 SBuf
  29 acl_httpstatus_data::toStr() const
  30 {
  31     SBuf rv;
  32     if (status2 == INT_MAX)
  33         rv.Printf("%d-", status1);
  34     else if (status1 == status2)
  35         rv.Printf("%d", status1);
  36     else
  37         rv.Printf("%d-%d", status1, status2);
  38     return rv;
  39 }
  40
  41 int acl_httpstatus_data::compare(acl_httpstatus_data* const& a, acl_httpstatus_data* const& b)
  42 {
  43     int ret;
  44     ret = aclHTTPStatusCompare(b, a);
  45
  46     if (ret != 0)
  47         ret = aclHTTPStatusCompare(a, b);
  48
  49     if (ret == 0) {
  50         const SBuf sa = a->toStr();
  51         const SBuf sb = b->toStr();
  52         debugs(28, DBG_CRITICAL, "WARNING: '" << sa << "' is a subrange of '" << sb << "'");
  53         debugs(28, DBG_CRITICAL, "WARNING: because of this '" << sa << "' is ignored to keep splay tree searching predictable");
  54         debugs(28, DBG_CRITICAL, "WARNING: You should probably remove '" << sb << "' from the ACL named '" << AclMatchedName << "'");
  55     }
  56
  57     return ret;
  58 }
  59
  60 ACL *
  61 ACLHTTPStatus::clone() const
  62 {
  63     return new ACLHTTPStatus(*this);
  64 }
  65
  66 ACLHTTPStatus::ACLHTTPStatus (char const *theClass) : data(NULL), class_ (theClass)
  67 {}
  68
  69 ACLHTTPStatus::ACLHTTPStatus (ACLHTTPStatus const & old) : data(NULL), class_ (old.class_)
  70 {
  71     /* we don't have copy constructors for the data yet */
  72     assert(!old.data);
  73 }
  74
  75 ACLHTTPStatus::~ACLHTTPStatus()
  76 {
  77     if (data) {
  78         data->destroy();
  79         delete data;
  80     }
  81 }
  82
  83 char const *
  84 ACLHTTPStatus::typeString() const
  85 {
  86     return class_;
  87 }
  88
  89 bool
  90 ACLHTTPStatus::empty () const
  91 {
  92     return data->empty();
  93 }
  94
  95 acl_httpstatus_data*
  96 aclParseHTTPStatusData(const char *t)
  97 {
  98     int status;
  99     status = atoi(t);
 100     t = strchr(t, '-');
 101
 102     if (!t)
 103         return new acl_httpstatus_data(status);
 104
 105     if (*(++t))
 106         return new acl_httpstatus_data(status, atoi(t));
 107
 108     return new acl_httpstatus_data(status, INT_MAX);
 109 }
 110
 111 void
 112 ACLHTTPStatus::parse()
 113 {
 114     aclParseHTTPStatusList (&data);
 115 }
 116
 117 void
 118 aclParseHTTPStatusList(Splay<acl_httpstatus_data *> **curlist)
 119 {
 120     char *t = NULL;
 121     acl_httpstatus_data *q = NULL;
 122
 123     while ((t = strtokFile())) {
 124         if ((q = aclParseHTTPStatusData(t)) == NULL)
 125             continue;
 126
 127         (*curlist)->insert(q, acl_httpstatus_data::compare);
 128     }
 129 }
 130
 131 int
 132 ACLHTTPStatus::match(ACLChecklist *checklist)
 133 {
 134     return aclMatchHTTPStatus(&data, Filled(checklist)->reply->sline.status());
 135 }
 136
 137 int
 138 aclMatchHTTPStatus(Splay<acl_httpstatus_data*> **dataptr, const Http::StatusCode status)
 139 {
 140     acl_httpstatus_data X(status);
 141     const acl_httpstatus_data * const * result = (*dataptr)->find(&X, aclHTTPStatusCompare);
 142
 143     debugs(28, 3, "aclMatchHTTPStatus: '" << status << "' " << (result ? "found" : "NOT found"));
 144     return (result != NULL);
 145 }
 146
 147 static int
 148 aclHTTPStatusCompare(acl_httpstatus_data * const &a, acl_httpstatus_data * const &b)
 149 {
 150     if (a->status1 < b->status1)
 151         return 1;
 152
 153     if (a->status1 > b->status2)
 154         return -1;
 155
 156     return 0;
 157 }
 158
 159 struct HttpStatusAclDumpVisitor {
 160     SBufList contents;
 161     void operator() (const acl_httpstatus_data * node) {
 162         contents.push_back(node->toStr());
 163     }
 164 };
 165
 166 SBufList
 167 ACLHTTPStatus::dump() const
 168 {
 169     HttpStatusAclDumpVisitor visitor;
 170     data->visit(visitor);
 171     return visitor.contents;
 172 }
 173