Mercurial > trustbridge
annotate ui/downloader_win.cpp @ 392:8090a1bc1b5b
Add a space in the command line
author | Andre Heinecke <andre.heinecke@intevation.de> |
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date | Tue, 15 Apr 2014 20:26:42 +0200 |
parents | 62cd56cea09b |
children | 17e1c8f37d72 |
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1 /** |
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2 * @file downloader_win.cpp |
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3 * @brief Downloader implementation for Windows |
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4 * |
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5 * We use Windows API here instead of Qt because we want to avoid |
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6 * QtNetworks SSL stack which is based on OpenSSL and so |
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7 * we might be incompatible with GPL code. Also using the |
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8 * native API means that the security of the SSL implementation |
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9 * is tied to the security of the system. |
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10 * |
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11 */ |
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12 #include "downloader.h" |
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13 #ifdef Q_OS_WIN |
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14 #ifndef MYVERSION |
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15 #define MYVERSION "1" |
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16 #endif |
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17 |
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18 #include <windows.h> |
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19 #include <winhttp.h> |
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20 |
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21 #include <QDebug> |
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22 #include <QDateTime> |
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23 #include <QSaveFile> |
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24 #include <QFileInfo> |
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25 |
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26 #define DEBUG if (1) qDebug() << __PRETTY_FUNCTION__ |
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27 |
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28 #define MAX_SW_SIZE 10485760 |
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29 #define MAX_LIST_SIZE 1048576 |
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30 /** @brief Download a file from the Internet |
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31 * |
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32 * @param[in] HSession the session to work in. |
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33 * @param[in] HConnect the connection to use. |
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34 * @param[in] resource the resource to download. |
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35 * @param[in] filename where the file should be saved. |
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36 * @param[in] maxSize maximum amount of bytes to download |
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37 * |
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38 * @returns True if the download was successful. |
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39 */ |
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40 bool downloadFile(HINTERNET hSession, HINTERNET hConnect, |
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41 LPCWSTR resource, const QString &filename, DWORD maxSize); |
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42 |
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43 /** @brief get the last modified header of a resource. |
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44 * |
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45 * On error call getLastError to get extended error information. |
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46 * This function still does not do any networking but only initializes |
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47 * it. |
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48 * |
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49 * @param[in] HSession the session to work in. |
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50 * @param[in] HConnect the connection to use. |
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51 * @param[in] resource the resource to check the last-modified date on |
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52 * |
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53 * @returns the last modified date or a null datetime in case of errors |
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54 */ |
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55 QDateTime getLastModifiedHeader(HINTERNET hSession, |
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56 HINTERNET hConnect, LPCWSTR resource); |
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57 |
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58 /** @brief verify that the certificate of the request matches |
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59 * |
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60 * Validates the certificate against the member variable certificate |
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61 * |
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62 * @param[in] hRequest: The request from which to get the certificate |
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63 * |
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64 * @returns True if the certificate exactly matches the one in hRequest |
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65 */ |
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66 |
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67 bool verifyCertificate(HINTERNET hRequest); |
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68 |
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69 |
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70 #define LIST_RESOURCE "/incoming/aheinecke/test" |
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71 #define SW_RESOURCE "/incoming/aheinecke/test" |
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72 |
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73 /** @brief A wrapper around a HINTERNET structure that handles closing |
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74 * |
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75 * Holds a HINTERNET structure and closes it if necessary on destruction. |
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76 * |
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77 */ |
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78 class SmartHINTERNET { |
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79 public: |
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80 SmartHINTERNET() : handle(NULL) {} |
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81 |
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82 ~SmartHINTERNET() { |
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83 if (handle) { |
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84 WinHttpCloseHandle(handle); |
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85 } |
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86 } |
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87 |
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88 HINTERNET handle; |
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89 }; |
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90 |
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91 /** @brief Qt wrapper around FormatMessage |
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92 * |
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93 * @returns The error message of the error that occurred |
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94 */ |
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95 const QString getLastErrorMsg() { |
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96 LPWSTR bufPtr = NULL; |
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97 DWORD err = GetLastError(); |
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98 FormatMessageW(FORMAT_MESSAGE_ALLOCATE_BUFFER | |
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99 FORMAT_MESSAGE_FROM_SYSTEM | |
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100 FORMAT_MESSAGE_IGNORE_INSERTS, |
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101 NULL, err, 0, (LPWSTR)&bufPtr, 0, NULL); |
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102 if (!bufPtr) { |
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103 HMODULE hWinhttp = GetModuleHandleW(L"winhttp"); |
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104 if (hWinhttp) { |
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105 FormatMessageW(FORMAT_MESSAGE_ALLOCATE_BUFFER | |
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106 FORMAT_MESSAGE_FROM_HMODULE | |
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107 FORMAT_MESSAGE_IGNORE_INSERTS, |
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108 hWinhttp, HRESULT_CODE(err), 0, |
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109 (LPWSTR)&bufPtr, 0, NULL); |
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110 } |
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111 } |
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112 const QString result = |
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113 (bufPtr) ? QString::fromUtf16((const ushort*)bufPtr).trimmed() : |
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114 QString("Unknown Error %1").arg(err); |
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115 LocalFree(bufPtr); |
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116 return result; |
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117 } |
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118 |
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119 |
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120 /** @brief open a session with appropriate proxy settings |
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121 * |
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122 * @param[inout] *pHSession pointer to a HInternet structure |
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123 * |
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124 * On error call getLastError to get extended error information. |
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125 * |
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126 * @returns True on success, false on error. |
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127 */ |
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128 |
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129 |
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130 bool openSession(HINTERNET *pHSession) |
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131 { |
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132 WINHTTP_CURRENT_USER_IE_PROXY_CONFIG proxyConfig; |
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133 |
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134 DEBUG; |
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135 if (!pHSession) { |
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136 SetLastError(ERROR_INVALID_PARAMETER); |
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137 return false; |
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138 } |
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139 |
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140 memset(&proxyConfig, 0, sizeof (WINHTTP_CURRENT_USER_IE_PROXY_CONFIG)); |
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141 |
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142 if (WinHttpGetIEProxyConfigForCurrentUser(&proxyConfig)) { |
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143 if (proxyConfig.fAutoDetect) { |
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144 // TODO Handle this |
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145 qDebug() << "Autodetect is set"; |
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146 } |
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147 |
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148 if (proxyConfig.lpszProxy || proxyConfig.lpszProxyBypass) { |
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149 DEBUG << "Using proxies."; |
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150 } |
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151 |
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152 if (proxyConfig.lpszProxy) { |
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153 *pHSession = WinHttpOpen(L"M13 "MYVERSION, |
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154 WINHTTP_ACCESS_TYPE_NAMED_PROXY, |
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155 proxyConfig.lpszProxy, |
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156 proxyConfig.lpszProxyBypass, 0); |
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157 } |
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158 } |
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159 |
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160 if (!*pHSession) { |
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161 DEBUG << "No IE Proxy falling back to default proxy"; |
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162 *pHSession = WinHttpOpen(L"M13 "MYVERSION, |
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163 WINHTTP_ACCESS_TYPE_DEFAULT_PROXY, |
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164 WINHTTP_NO_PROXY_NAME, |
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165 WINHTTP_NO_PROXY_BYPASS, 0); |
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166 } |
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167 // Cleanup |
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168 if (proxyConfig.lpszAutoConfigUrl) { |
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169 GlobalFree(proxyConfig.lpszAutoConfigUrl); |
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170 } |
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171 |
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172 if (proxyConfig.lpszProxy) { |
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173 GlobalFree(proxyConfig.lpszProxy); |
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174 } |
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175 |
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176 if (proxyConfig.lpszProxyBypass) { |
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177 GlobalFree(proxyConfig.lpszProxyBypass); |
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178 } |
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179 return *pHSession; |
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180 } |
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181 |
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182 |
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183 /** @brief initialize a connection in the session |
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184 * |
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185 * @param[in] HSession the session to work in. |
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186 * @param[inout] *pHConnect pointer to the connection. |
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187 * @param[in] url pointer to the URL in wchar representation. |
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188 * |
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189 * On error call getLastError to get extended error information. |
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190 * |
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191 * @returns True on success, false on error. |
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192 */ |
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193 bool initializeConnection(HINTERNET hSession, HINTERNET *pHConnect, |
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194 LPCWSTR url) |
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195 { |
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196 DEBUG; |
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197 if (!hSession || !pHConnect) { |
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198 SetLastError(ERROR_INVALID_PARAMETER); |
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199 return false; |
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200 } |
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201 // Initialize connection. No request is done here. |
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202 *pHConnect = WinHttpConnect(hSession, url, |
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203 INTERNET_DEFAULT_HTTPS_PORT, 0); |
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204 |
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205 return *pHConnect; |
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206 } |
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207 |
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208 /** @brief Create a request |
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209 * |
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210 * @param[in] HSession the session to work in. |
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211 * @param[in] HConnect the connection to use. |
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212 * @param[inout] *pHRequest pointer to the request structure to be filled. |
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213 * @param[in] requestType the HTTP request to be made default is GET |
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214 * @param[in] resource pointer to the resource to request in wchar |
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215 * representation. |
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216 * |
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217 * On error call getLastError to get extended error information. |
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218 * This function still does not do any networking but only initializes |
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219 * it. |
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220 * |
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221 * @returns True on success, false on error. |
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222 */ |
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223 |
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224 bool createRequest(HINTERNET hSession, HINTERNET hConnect, |
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225 HINTERNET *pHRequest, LPCWSTR requestType, LPCWSTR resource) |
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226 { |
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227 DWORD dwSSLFlag; |
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228 DEBUG; |
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229 if (!hSession || !hConnect || !pHRequest) { |
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230 SetLastError(ERROR_INVALID_PARAMETER); |
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231 return false; |
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232 } |
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233 |
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234 *pHRequest = WinHttpOpenRequest(hConnect, requestType, resource, |
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235 NULL, WINHTTP_NO_REFERER, |
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236 WINHTTP_DEFAULT_ACCEPT_TYPES, |
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237 WINHTTP_FLAG_SECURE); |
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238 |
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239 dwSSLFlag = SECURITY_FLAG_IGNORE_UNKNOWN_CA; |
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240 dwSSLFlag |= SECURITY_FLAG_IGNORE_CERT_DATE_INVALID; |
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241 dwSSLFlag |= SECURITY_FLAG_IGNORE_CERT_CN_INVALID; |
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242 dwSSLFlag |= SECURITY_FLAG_IGNORE_CERT_WRONG_USAGE; |
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243 |
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244 WinHttpSetOption(*pHRequest, WINHTTP_OPTION_SECURITY_FLAGS, |
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245 &dwSSLFlag, sizeof(dwSSLFlag)); |
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246 |
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247 return *pHRequest; |
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248 } |
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249 |
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250 bool Downloader::verifyCertificate(HINTERNET hRequest) |
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251 { |
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252 CERT_CONTEXT *certContext = NULL; |
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253 DWORD certContextLen = sizeof(CERT_CONTEXT); |
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254 bool retval = false; |
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255 |
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256 if (!WinHttpQueryOption(hRequest, |
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257 WINHTTP_OPTION_SERVER_CERT_CONTEXT, |
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258 &certContext, |
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259 &certContextLen)) { |
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260 DEBUG << "Unable to get server certificate"; |
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261 return false; |
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262 } |
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263 |
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264 QByteArray serverCert ((const char *) certContext->pbCertEncoded, |
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265 certContext->cbCertEncoded); |
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266 |
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267 retval = (serverCert == mCert); |
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268 |
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269 if (!retval) { |
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270 DEBUG << "Certificate is not the same as the pinned one!" |
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271 << "Base64 cert: " << serverCert.toBase64(); |
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272 emit error("Invalid certificate", InvalidCertificate); |
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273 } |
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274 |
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275 CertFreeCertificateContext(certContext); |
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276 return retval; |
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277 } |
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278 |
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279 QDateTime Downloader::getLastModifiedHeader(HINTERNET hSession, |
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280 HINTERNET hConnect, LPCWSTR resource) |
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281 { |
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282 SmartHINTERNET sHRequest; |
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283 SYSTEMTIME lMod; |
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284 DWORD sizeOfSystemtime = sizeof (SYSTEMTIME); |
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285 QDateTime retval; |
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286 |
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287 memset(&lMod, 0, sizeof (SYSTEMTIME)); |
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288 |
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289 if (!hSession || !hConnect || !resource) { |
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290 SetLastError(ERROR_INVALID_PARAMETER); |
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291 return retval; |
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292 } |
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293 |
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294 if (!createRequest(hSession, hConnect, &sHRequest.handle, L"HEAD", |
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295 resource)) { |
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296 return retval; |
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297 } |
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298 |
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299 if (!WinHttpSendRequest(sHRequest.handle, |
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300 WINHTTP_NO_ADDITIONAL_HEADERS, |
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301 0, WINHTTP_NO_REQUEST_DATA, 0, |
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302 0, 0)) { |
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303 return retval; |
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304 } |
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305 |
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306 |
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307 if (!WinHttpReceiveResponse(sHRequest.handle, NULL)) { |
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308 return retval; |
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309 } |
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310 |
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311 if (!verifyCertificate(sHRequest.handle)) { |
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312 DEBUG << "Certificate verification failed"; |
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313 return retval; |
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314 } |
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315 |
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316 if (!(WinHttpQueryHeaders(sHRequest.handle, |
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317 WINHTTP_QUERY_LAST_MODIFIED | |
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318 WINHTTP_QUERY_FLAG_SYSTEMTIME, |
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319 NULL, |
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320 &lMod, |
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321 &sizeOfSystemtime, |
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322 WINHTTP_NO_HEADER_INDEX))) { |
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323 return retval; |
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324 } |
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325 |
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326 retval = QDateTime(QDate(lMod.wYear, lMod.wMonth, lMod.wDay), |
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327 QTime(lMod.wHour, lMod.wMinute, lMod.wSecond, |
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328 lMod.wMilliseconds), |
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329 Qt::UTC); |
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330 return retval; |
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331 } |
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332 |
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333 bool Downloader::downloadFile(HINTERNET hSession, HINTERNET hConnect, |
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334 LPCWSTR resource, const QString &fileName, DWORD maxSize) |
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335 { |
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336 SmartHINTERNET sHRequest; |
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337 bool retval = false; |
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338 DWORD bytesAvailable = 0, |
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339 bytesRead = 0, |
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340 totalDownloaded = 0, |
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341 contentLength = 0, |
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342 sizeOfDWORD = sizeof (DWORD); |
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343 |
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344 QSaveFile outputFile(fileName); |
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345 |
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346 if (!hSession || !hConnect || !resource) { |
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347 SetLastError(ERROR_INVALID_PARAMETER); |
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348 return retval; |
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349 } |
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350 |
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351 if (!createRequest(hSession, hConnect, &sHRequest.handle, L"GET", |
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352 resource)) { |
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353 return retval; |
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354 } |
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355 |
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356 if (!WinHttpSendRequest(sHRequest.handle, |
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357 WINHTTP_NO_ADDITIONAL_HEADERS, |
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358 0, WINHTTP_NO_REQUEST_DATA, 0, |
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359 0, 0)) { |
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360 return retval; |
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361 } |
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362 |
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363 |
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364 if (!WinHttpReceiveResponse(sHRequest.handle, NULL)) { |
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365 return retval; |
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366 } |
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367 |
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368 if (!verifyCertificate(sHRequest.handle)) { |
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369 DEBUG << "Certificate verification failed"; |
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370 return retval; |
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371 } |
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372 |
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373 |
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374 if (!(WinHttpQueryHeaders(sHRequest.handle, |
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375 WINHTTP_QUERY_CONTENT_LENGTH | |
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376 WINHTTP_QUERY_FLAG_NUMBER, |
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377 NULL, |
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378 &contentLength, |
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379 &sizeOfDWORD, |
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380 WINHTTP_NO_HEADER_INDEX))) { |
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381 // Continue anyway as we later really check how |
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382 // much we download. |
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383 DEBUG << "No content-length"; |
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384 } |
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385 |
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386 if (contentLength > maxSize) { |
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387 return retval; |
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388 } |
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389 |
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390 if (contentLength) { |
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391 QFileInfo finf(fileName); |
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392 if (finf.exists() && finf.isReadable() && |
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393 finf.size() == contentLength) { |
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394 // We already have data of the same size |
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395 // No need to waste bandwidth. |
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396 DEBUG << "Skipping download because file exists"; |
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397 retval = true; |
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398 return retval; |
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399 } |
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400 } |
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401 |
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402 // Open / Create the file to write to. |
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403 if (!outputFile.open(QIODevice::WriteOnly)) { |
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404 DEBUG << "Failed to open file"; |
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405 return retval; |
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406 } |
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407 |
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408 DEBUG << "output file size: " << outputFile.size(); |
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409 do |
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410 { |
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411 char outBuf[8192]; // 8KB is the internal buffer size of winhttp |
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412 memset(outBuf, 0, sizeof(outBuf)); |
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413 bytesRead = 0; |
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414 |
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415 if (!WinHttpQueryDataAvailable(sHRequest.handle, &bytesAvailable)) { |
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416 DEBUG << "Querying for available data failed"; |
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417 retval = false; |
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418 break; |
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419 } |
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420 |
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421 if (!bytesAvailable) { |
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422 // Might indicate that we are done. |
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423 break; |
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424 } |
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425 |
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426 if (bytesAvailable > maxSize) { |
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427 DEBUG << "File to large"; |
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428 retval = false; |
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429 SetLastError(ERROR_INVALID_DATA); |
15
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430 break; |
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431 } |
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432 |
23
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433 if (!WinHttpReadData(sHRequest.handle, (LPVOID)outBuf, |
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434 sizeof(outBuf), &bytesRead)) { |
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435 DEBUG << "Error reading data"; |
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436 break; |
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437 } else { |
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438 if (bytesRead) { |
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439 // Write data to file. |
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440 if (outputFile.write(outBuf, bytesRead) != |
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441 bytesRead) { |
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442 DEBUG << "Error writing to file."; |
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443 retval = false; |
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444 } |
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445 // Completed a read / write cycle. If not error follows |
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446 // the download was successful. |
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447 retval = true; |
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448 } else { |
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449 // Should not happen as we queried for available |
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450 // bytes before and the function did not return an |
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451 // error. |
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452 DEBUG << "Unable to read available data"; |
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453 retval = false; |
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454 break; |
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455 } |
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456 } |
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457 totalDownloaded += bytesRead; |
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458 |
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459 if (totalDownloaded > maxSize) { |
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460 DEBUG << "Downloaded too much data. Breaking."; |
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461 retval = false; |
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462 break; |
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463 } |
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464 } while (bytesAvailable > 0); |
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465 |
17
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466 if (retval && outputFile.isOpen()) { |
15
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467 // Actually save the file to disk / move to homedir |
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468 retval = outputFile.commit(); |
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469 } |
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470 |
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471 return retval; |
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472 } |
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473 |
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474 void Downloader::run() { |
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475 bool results = false; |
23
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476 SmartHINTERNET sHSession; |
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477 SmartHINTERNET sHConnect; |
15
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478 wchar_t wUrl[mUrl.size() + 1]; |
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479 QDateTime lastModifiedSoftware; |
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480 QDateTime lastModifiedList; |
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481 |
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482 int rc = 0; |
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483 |
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484 memset(wUrl, 0, sizeof (wchar_t) * (mUrl.size() + 1)); |
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485 |
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486 rc = mUrl.toWCharArray(wUrl); |
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487 |
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488 if (rc != mUrl.size()) { |
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489 DEBUG << "Problem converting to wchar array"; |
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490 return; |
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491 } |
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492 |
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493 // Should not be necessary because we initialized the memory |
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494 wUrl[rc] = '\0'; |
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495 |
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496 // Initialize connection |
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497 if (!openSession(&sHConnect.handle)) { |
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498 DEBUG << "Failed to open session: " << getLastErrorMsg(); |
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499 return; |
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500 } |
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501 if (!initializeConnection(sHConnect.handle, &sHConnect.handle, wUrl)) { |
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502 DEBUG << "Failed to initialize connection: " << getLastErrorMsg(); |
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503 return; |
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504 } |
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505 |
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506 |
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507 lastModifiedSoftware = getLastModifiedHeader(sHConnect.handle, sHConnect.handle, |
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508 L""SW_RESOURCE); |
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509 |
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510 lastModifiedList = getLastModifiedHeader(sHConnect.handle, sHConnect.handle, |
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511 L""LIST_RESOURCE); |
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512 |
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513 if (!lastModifiedList.isValid() || !lastModifiedSoftware.isValid()) { |
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514 DEBUG << "Could not read headers: " << getLastErrorMsg(); |
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515 return; |
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516 } |
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517 |
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518 if (!mLastModSW.isValid() || lastModifiedSoftware > mLastModSW) { |
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519 QString dataDirectory = getDataDirectory(); |
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520 |
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521 if (dataDirectory.isEmpty()) { |
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522 DEBUG << "Failed to get data directory"; |
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523 return; |
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524 } |
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525 |
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526 QString fileName = dataDirectory.append("/SW-") |
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527 .append(lastModifiedSoftware.toString("yyyymmddHHmmss")) |
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528 .append(".exe"); |
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529 |
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530 DEBUG << "fileName: " << fileName; |
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531 |
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532 if (!downloadFile(sHConnect.handle, sHConnect.handle, L""SW_RESOURCE, |
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533 fileName, MAX_SW_SIZE)) { |
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534 DEBUG << "Error downloading File: " << getLastErrorMsg(); |
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535 return; |
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536 } |
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537 |
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538 emit newSoftwareAvailable(fileName, lastModifiedSoftware); |
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539 } else if (!mLastModList.isValid() || lastModifiedList > mLastModList) { |
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540 QString dataDirectory = getDataDirectory(); |
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541 |
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542 if (dataDirectory.isEmpty()) { |
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543 DEBUG << "Failed to get data directory"; |
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544 return; |
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545 } |
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546 |
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547 QString fileName = dataDirectory.append("/list-") |
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548 .append(lastModifiedSoftware.toString("yyyymmddHHmmss")) |
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549 .append(".txt"); |
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550 |
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551 DEBUG << "fileName: " << fileName; |
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552 |
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553 if (!downloadFile(sHConnect.handle, sHConnect.handle, L""LIST_RESOURCE, |
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554 fileName, MAX_LIST_SIZE)) { |
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555 DEBUG << "Error downloading File: " << getLastErrorMsg(); |
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556 return; |
15
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557 } |
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558 |
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559 emit newListAvailable(fileName, lastModifiedList); |
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560 } |
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561 |
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562 DEBUG << "SW date: " << lastModifiedSoftware; |
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563 DEBUG << "List date: " << lastModifiedList; |
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564 |
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565 if (!results) { |
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566 // Report any errors. |
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567 DEBUG << "Error" << GetLastError(); |
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568 emit error(tr("Unknown Problem when connecting"), ErrUnknown); |
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569 } |
20
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|
570 |
11
7e2f14c7aba2
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571 return; |
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|
572 } |
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573 #endif |