1 | // |
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2 | // URIStreamOpener.cpp |
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3 | // |
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4 | // $Id: //poco/1.3/Foundation/src/URIStreamOpener.cpp#2 $ |
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5 | // |
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6 | // Library: Foundation |
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7 | // Package: URI |
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8 | // Module: URIStreamOpener |
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9 | // |
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10 | // Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH. |
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11 | // and Contributors. |
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12 | // |
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13 | // Permission is hereby granted, free of charge, to any person or organization |
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14 | // obtaining a copy of the software and accompanying documentation covered by |
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15 | // this license (the "Software") to use, reproduce, display, distribute, |
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16 | // execute, and transmit the Software, and to prepare derivative works of the |
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17 | // Software, and to permit third-parties to whom the Software is furnished to |
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18 | // do so, all subject to the following: |
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19 | // |
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20 | // The copyright notices in the Software and this entire statement, including |
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21 | // the above license grant, this restriction and the following disclaimer, |
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22 | // must be included in all copies of the Software, in whole or in part, and |
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23 | // all derivative works of the Software, unless such copies or derivative |
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24 | // works are solely in the form of machine-executable object code generated by |
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25 | // a source language processor. |
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26 | // |
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27 | // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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28 | // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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29 | // FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT |
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30 | // SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE |
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31 | // FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE, |
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32 | // ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER |
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33 | // DEALINGS IN THE SOFTWARE. |
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34 | // |
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35 | |
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36 | |
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37 | #include <Poco/URIStreamOpener.h> |
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38 | #include <Poco/URIStreamFactory.h> |
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39 | #include <Poco/FileStreamFactory.h> |
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40 | #include <Poco/URI.h> |
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41 | #include <Poco/Path.h> |
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42 | #include <Poco/SingletonHolder.h> |
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43 | #include <Poco/Exception.h> |
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44 | |
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45 | |
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46 | namespace Poco { |
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47 | |
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48 | |
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49 | URIStreamOpener::URIStreamOpener() |
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50 | { |
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51 | registerStreamFactory("file", new FileStreamFactory); |
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52 | } |
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53 | |
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54 | |
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55 | URIStreamOpener::~URIStreamOpener() |
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56 | { |
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57 | for (FactoryMap::iterator it = _map.begin(); it != _map.end(); ++it) |
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58 | delete it->second; |
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59 | } |
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60 | |
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61 | |
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62 | std::istream* URIStreamOpener::open(const URI& uri) const |
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63 | { |
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64 | FastMutex::ScopedLock lock(_mutex); |
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65 | |
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66 | std::string scheme; |
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67 | if (uri.isRelative()) |
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68 | scheme = "file"; |
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69 | else |
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70 | scheme = uri.getScheme(); |
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71 | return openURI(scheme, uri); |
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72 | } |
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73 | |
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74 | |
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75 | std::istream* URIStreamOpener::open(const std::string& pathOrURI) const |
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76 | { |
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77 | FastMutex::ScopedLock lock(_mutex); |
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78 | |
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79 | try |
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80 | { |
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81 | URI uri(pathOrURI); |
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82 | std::string scheme(uri.getScheme()); |
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83 | FactoryMap::const_iterator it = _map.find(scheme); |
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84 | if (it != _map.end()) |
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85 | return openURI(scheme, uri); |
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86 | } |
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87 | catch (Exception&) |
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88 | { |
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89 | } |
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90 | Path path(pathOrURI, Path::PATH_GUESS); |
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91 | return openFile(path); |
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92 | } |
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93 | |
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94 | |
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95 | std::istream* URIStreamOpener::open(const std::string& basePathOrURI, const std::string& pathOrURI) const |
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96 | { |
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97 | FastMutex::ScopedLock lock(_mutex); |
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98 | |
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99 | try |
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100 | { |
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101 | URI uri(basePathOrURI); |
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102 | std::string scheme(uri.getScheme()); |
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103 | FactoryMap::const_iterator it = _map.find(scheme); |
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104 | if (it != _map.end()) |
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105 | { |
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106 | uri.resolve(pathOrURI); |
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107 | return openURI(scheme, uri); |
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108 | } |
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109 | } |
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110 | catch (Exception&) |
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111 | { |
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112 | } |
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113 | Path base(basePathOrURI, Path::PATH_GUESS); |
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114 | Path path(pathOrURI, Path::PATH_GUESS); |
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115 | base.resolve(path); |
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116 | return openFile(base); |
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117 | } |
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118 | |
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119 | |
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120 | void URIStreamOpener::registerStreamFactory(const std::string& scheme, URIStreamFactory* pFactory) |
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121 | { |
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122 | poco_check_ptr (pFactory); |
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123 | |
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124 | FastMutex::ScopedLock lock(_mutex); |
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125 | if (_map.find(scheme) == _map.end()) |
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126 | { |
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127 | _map[scheme] = pFactory; |
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128 | } |
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129 | else throw ExistsException("An URIStreamFactory for the given scheme has already been registered", scheme); |
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130 | } |
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131 | |
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132 | |
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133 | void URIStreamOpener::unregisterStreamFactory(const std::string& scheme) |
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134 | { |
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135 | FastMutex::ScopedLock lock(_mutex); |
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136 | |
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137 | FactoryMap::iterator it = _map.find(scheme); |
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138 | if (it != _map.end()) |
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139 | { |
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140 | URIStreamFactory* pFactory = it->second; |
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141 | _map.erase(it); |
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142 | delete pFactory; |
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143 | } |
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144 | else throw NotFoundException("No URIStreamFactory has been registered for the given scheme", scheme); |
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145 | } |
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146 | |
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147 | |
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148 | bool URIStreamOpener::supportsScheme(const std::string& scheme) |
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149 | { |
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150 | FastMutex::ScopedLock lock(_mutex); |
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151 | return _map.find(scheme) != _map.end(); |
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152 | } |
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153 | |
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154 | |
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155 | URIStreamOpener& URIStreamOpener::defaultOpener() |
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156 | { |
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157 | static SingletonHolder<URIStreamOpener> sh; |
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158 | return *sh.get(); |
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159 | } |
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160 | |
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161 | |
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162 | std::istream* URIStreamOpener::openFile(const Path& path) const |
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163 | { |
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164 | FileStreamFactory factory; |
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165 | return factory.open(path); |
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166 | } |
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167 | |
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168 | |
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169 | std::istream* URIStreamOpener::openURI(const std::string& scheme, const URI& uri) const |
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170 | { |
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171 | std::string actualScheme(scheme); |
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172 | URI actualURI(uri); |
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173 | int redirects = 0; |
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174 | |
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175 | while (redirects < MAX_REDIRECTS) |
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176 | { |
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177 | try |
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178 | { |
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179 | FactoryMap::const_iterator it = _map.find(actualScheme); |
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180 | if (it != _map.end()) |
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181 | return it->second->open(actualURI); |
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182 | else if (redirects > 0) |
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183 | throw UnknownURISchemeException(actualURI.toString() + std::string("; redirected from ") + uri.toString()); |
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184 | else |
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185 | throw UnknownURISchemeException(actualURI.toString()); |
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186 | } |
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187 | catch (URIRedirection& redir) |
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188 | { |
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189 | actualURI = redir.uri(); |
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190 | actualScheme = actualURI.getScheme(); |
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191 | ++redirects; |
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192 | } |
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193 | } |
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194 | throw IOException("Too many redirects while opening URI", uri.toString()); |
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195 | } |
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196 | |
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197 | |
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198 | } // namespace Poco |
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