Panda3D
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00001 // Filename: httpEntityTag.cxx 00002 // Created by: drose (28Jan03) 00003 // 00004 //////////////////////////////////////////////////////////////////// 00005 // 00006 // PANDA 3D SOFTWARE 00007 // Copyright (c) Carnegie Mellon University. All rights reserved. 00008 // 00009 // All use of this software is subject to the terms of the revised BSD 00010 // license. You should have received a copy of this license along 00011 // with this source code in a file named "LICENSE." 00012 // 00013 //////////////////////////////////////////////////////////////////// 00014 00015 #include "httpEntityTag.h" 00016 00017 00018 //////////////////////////////////////////////////////////////////// 00019 // Function: HTTPEntityTag::Constructor 00020 // Access: Published 00021 // Description: This constructor accepts a string as formatted from 00022 // an HTTP server (e.g. the tag is quoted, with an 00023 // optional W/ prefix.) 00024 //////////////////////////////////////////////////////////////////// 00025 HTTPEntityTag:: 00026 HTTPEntityTag(const string &text) { 00027 _weak = false; 00028 00029 size_t p = 0; 00030 if (text.length() >= 2) { 00031 string sub = text.substr(0, 2); 00032 if (sub == "W/" || sub == "w/") { 00033 _weak = true; 00034 p = 2; 00035 } 00036 } 00037 00038 // Unquote the string. 00039 bool quoted = false; 00040 if (p < text.length() && text[p] == '"') { 00041 quoted = true; 00042 p++; 00043 } 00044 while (p < text.length() && !(quoted && text[p] == '"')) { 00045 if (text[p] == '\\') { 00046 p++; 00047 } 00048 _tag += text[p]; 00049 p++; 00050 } 00051 } 00052 00053 //////////////////////////////////////////////////////////////////// 00054 // Function: HTTPEntityTag::get_string 00055 // Access: Published 00056 // Description: Returns the entity tag formatted for sending to an 00057 // HTTP server (the tag is quoted, with a conditional W/ 00058 // prefix). 00059 //////////////////////////////////////////////////////////////////// 00060 string HTTPEntityTag:: 00061 get_string() const { 00062 ostringstream result; 00063 if (_weak) { 00064 result << "W/"; 00065 } 00066 result << '"'; 00067 00068 for (string::const_iterator ti = _tag.begin(); ti != _tag.end(); ++ti) { 00069 switch (*ti) { 00070 case '"': 00071 case '\\': 00072 result << '\\'; 00073 // fall through 00074 00075 default: 00076 result << (*ti); 00077 } 00078 } 00079 00080 result << '"'; 00081 00082 return result.str(); 00083 }