src/http/RegisteredHeaders.cc

   1 /*
   2  * Copyright (C) 1996-2021 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 #include "squid.h"
  10 #include "RegisteredHeaders.h"
  11
  12 #include <ostream>
  13 #include <vector>
  14
  15 namespace Http
  16 {
  17 /* glue to code generated by gperf */
  18 #include "http/RegisteredHeadersHash.cci"
  19
  20 HeaderTableRecord::HeaderTableRecord() :
  21     name(""), id(HdrType::BAD_HDR), type(HdrFieldType::ftInvalid),
  22     list(false), request(false), reply(false), hopbyhop(false), denied304(false)
  23 {}
  24
  25 HeaderTableRecord::HeaderTableRecord(const char *n) :
  26     name(n), id(HdrType::BAD_HDR), type(HdrFieldType::ftInvalid),
  27     list(false), request(false), reply(false), hopbyhop(false), denied304(false)
  28 {}
  29
  30 HeaderTableRecord::HeaderTableRecord(const char *n, HdrType theId, HdrFieldType theType, int theKind) :
  31     name(n), id(theId), type(theType),
  32     list(theKind & HdrKind::ListHeader), request(theKind & HdrKind::RequestHeader),
  33     reply(theKind & HdrKind::ReplyHeader), hopbyhop(theKind & HdrKind::HopByHopHeader),
  34     denied304(theKind & HdrKind::Denied304Header)
  35 {}
  36
  37 const HeaderTableRecord&
  38 HeaderLookupTable_t::lookup (const char *buf, const std::size_t len) const {
  39     const HeaderTableRecord *r = HttpHeaderHashTable::lookup(buf, len);
  40     if (!r || r->id == Http::HdrType::OTHER)
  41         return BadHdr;
  42     return *r;
  43 }
  44 const HeaderTableRecord HeaderLookupTable_t::BadHdr {"*INVALID*:", Http::HdrType::BAD_HDR, Http::HdrFieldType::ftInvalid, HdrKind::None};
  45
  46 HeaderLookupTable_t::HeaderLookupTable_t()
  47 {
  48     initCache();
  49 }
  50
  51 void
  52 HeaderLookupTable_t::initCache()
  53 {
  54     idCache.resize(TOTAL_KEYWORDS);
  55     for (int j = MIN_HASH_VALUE; j <= MAX_HASH_VALUE; ++j) { //MAX_HASH_VALUE is exported by gperf
  56         if (HttpHeaderDefinitionsTable[j].name[0] != '\0') { //some slots are empty
  57             idCache[static_cast<int>(HttpHeaderDefinitionsTable[j].id)] =
  58                 & HttpHeaderDefinitionsTable[j];
  59         }
  60     }
  61     //check after the fact. The cache array must be full
  62     for (auto e : idCache) {
  63         assert(e->name);
  64     }
  65 }
  66 const HeaderLookupTable_t HeaderLookupTable;
  67
  68 }; /* namespace Http */
  69
  70 std::ostream&
  71 operator<< (std::ostream &s, Http::HdrType id)
  72 {
  73     if (Http::any_HdrType_enum_value(id))
  74         s << Http::HeaderLookupTable.lookup(id).name << '[' << static_cast<int>(id) << ']';
  75     else
  76         s << "Invalid-Header[" << static_cast<int>(id) << ']';
  77     return s;
  78 }
  79