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1 /**
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2 * Palantir - A Lightweight, RESTful DICOM Store
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3 * Copyright (C) 2012 Medical Physics Department, CHU of Liege,
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4 * Belgium
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5 *
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6 * This program is free software: you can redistribute it and/or
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7 * modify it under the terms of the GNU General Public License as
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8 * published by the Free Software Foundation, either version 3 of the
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9 * License, or (at your option) any later version.
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10 *
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11 * This program is distributed in the hope that it will be useful, but
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12 * WITHOUT ANY WARRANTY; without even the implied warranty of
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13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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14 * General Public License for more details.
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15 *
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16 * You should have received a copy of the GNU General Public License
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17 * along with this program. If not, see <http://www.gnu.org/licenses/>.
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18 **/
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19
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20
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21 #include "HttpOutput.h"
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22
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23 #include <vector>
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24 #include <stdio.h>
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25 #include <boost/lexical_cast.hpp>
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26 #include "../PalantirException.h"
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27 #include "../Toolbox.h"
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28 #include "../../PalantirCppClient/HttpException.h"
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29
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30 namespace Palantir
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31 {
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32 void HttpOutput::SendString(const std::string& s)
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33 {
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34 if (s.size() > 0)
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35 Send(&s[0], s.size());
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36 }
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37
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38 void HttpOutput::SendOkHeader(const std::string& contentType)
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39 {
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40 SendOkHeader(contentType.c_str(), false, 0);
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41 }
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42
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43 void HttpOutput::SendOkHeader()
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44 {
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45 SendOkHeader(NULL, false, 0);
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46 }
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47
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48 void HttpOutput::SendOkHeader(uint64_t contentLength)
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49 {
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50 SendOkHeader(NULL, true, contentLength);
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51 }
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52
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53 void HttpOutput::SendOkHeader(const std::string& contentType,
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54 uint64_t contentLength)
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55 {
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56 SendOkHeader(contentType.c_str(), true, contentLength);
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57 }
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58
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59
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60 void HttpOutput::SendOkHeader(const char* contentType,
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61 bool hasContentLength,
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62 size_t contentLength)
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63 {
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64 std::string s = "HTTP/1.1 200 OK\r\n";
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65
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66 if (contentType)
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67 {
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68 s += "Content-Type: " + std::string(contentType) + "\r\n";
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69 }
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70
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71 if (hasContentLength)
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72 {
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73 s += "Content-Length: " + boost::lexical_cast<std::string>(contentLength) + "\r\n";
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74 }
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75
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76 s += "\r\n";
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77
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78 Send(&s[0], s.size());
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79 }
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80
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81
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82 void HttpOutput::SendMethodNotAllowedError(const std::string& allowed)
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83 {
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84 std::string s =
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85 "HTTP/1.1 405 " + std::string(HttpException::GetDescription(HttpStatus_405_MethodNotAllowed)) +
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86 "\r\nAllow: " + allowed +
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87 "\r\n\r\n";
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88 Send(&s[0], s.size());
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89 }
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90
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91
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92 void HttpOutput::SendHeader(HttpStatus status)
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93 {
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94 if (status == HttpStatus_200_Ok ||
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95 status == HttpStatus_405_MethodNotAllowed)
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96 {
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97 throw PalantirException("Please use the dedicated methods to this HTTP status code in HttpOutput");
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98 }
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99
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100 SendHeaderInternal(status);
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101 }
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102
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103
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104 void HttpOutput::SendHeaderInternal(HttpStatus status)
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105 {
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106 std::string s = "HTTP/1.1 " +
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107 boost::lexical_cast<std::string>(status) +
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108 " " + std::string(HttpException::GetDescription(status)) +
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109 "\r\n\r\n";
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110 Send(&s[0], s.size());
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111 }
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112
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113
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114 void HttpOutput::AnswerBufferWithContentType(const std::string& buffer,
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115 const std::string& contentType)
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116 {
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117 SendOkHeader(contentType.c_str(), true, buffer.size());
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118 SendString(buffer);
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119 }
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120
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121
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122 void HttpOutput::AnswerBufferWithContentType(const void* buffer,
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123 size_t size,
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124 const std::string& contentType)
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125 {
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126 SendOkHeader(contentType.c_str(), true, size);
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127 Send(buffer, size);
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128 }
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129
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130
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131 void HttpOutput::AnswerFileWithContentType(const std::string& path,
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132 const std::string& contentType)
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133 {
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134 uint64_t fileSize = Toolbox::GetFileSize(path);
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135
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136 FILE* fp = fopen(path.c_str(), "rb");
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137 if (!fp)
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138 {
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139 SendHeaderInternal(HttpStatus_500_InternalServerError);
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140 return;
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141 }
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142
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143 SendOkHeader(contentType.c_str(), true, fileSize);
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144
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145 std::vector<uint8_t> buffer(1024 * 1024); // Chunks of 1MB
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146
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147 for (;;)
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148 {
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149 size_t nbytes = fread(&buffer[0], 1, buffer.size(), fp);
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150 if (nbytes == 0)
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151 {
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152 break;
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153 }
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154 else
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155 {
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156 Send(&buffer[0], nbytes);
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157 }
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158 }
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159
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160 fclose(fp);
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161 }
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162
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163
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164 void HttpOutput::AnswerFileAutodetectContentType(const std::string& path)
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165 {
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166 AnswerFileWithContentType(path, Toolbox::AutodetectMimeType(path));
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167 }
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168
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169
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170 void HttpOutput::AnswerFile(const FileStorage& storage,
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171 const std::string& uuid,
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172 const std::string& contentType)
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173 {
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174 boost::filesystem::path p(storage.GetPath(uuid));
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175 AnswerFileWithContentType(p.string(), contentType);
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176 }
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177
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178
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179
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180 void HttpOutput::Redirect(const std::string& path)
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181 {
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182 std::string s =
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183 "HTTP/1.1 301 " + std::string(HttpException::GetDescription(HttpStatus_301_MovedPermanently)) +
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184 "\r\nLocation: " + path +
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185 "\r\n\r\n";
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186 Send(&s[0], s.size());
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187 }
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188 }
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