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annotate ui/downloader_win.cpp @ 11:7e2f14c7aba2

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Split up downloader component and further implement it
author Andre Heinecke <aheinecke@intevation.de>
date Fri, 14 Feb 2014 11:20:15 +0000
parents
children 95e1b6edf2fc
rev   line source
11
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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
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23 #define DEBUG if (1) qDebug() << __PRETTY_FUNCTION__
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24
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25 const QString getLastErrorMsg() {
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26 LPWSTR bufPtr = NULL;
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27 DWORD err = GetLastError();
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28 FormatMessageW(FORMAT_MESSAGE_ALLOCATE_BUFFER |
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29 FORMAT_MESSAGE_FROM_SYSTEM |
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30 FORMAT_MESSAGE_IGNORE_INSERTS,
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31 NULL, err, 0, (LPWSTR)&bufPtr, 0, NULL);
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32 const QString result =
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33 (bufPtr) ? QString::fromUtf16((const ushort*)bufPtr).trimmed() :
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34 QString("Unknown Error %1").arg(err);
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35 LocalFree(bufPtr);
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36 return result;
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37 }
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38
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39 /** @brief open a session with appropiate proxy settings
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40 *
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41 * @param[inout] *pHSession pointer to a HInternet structure
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42 *
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43 * On error call getLastError to get extended error information.
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44 *
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45 * @returns True on success, false on error.
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46 */
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47
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48
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49 bool openSession(HINTERNET *pHSession)
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50 {
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51 WINHTTP_CURRENT_USER_IE_PROXY_CONFIG proxyConfig;
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52
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53 DEBUG;
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54 if (!pHSession) {
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55 SetLastError(ERROR_INVALID_PARAMETER);
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56 return false;
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57 }
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58
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59 qDebug() << "2";
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60 memset(&proxyConfig, 0, sizeof (WINHTTP_CURRENT_USER_IE_PROXY_CONFIG));
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61
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62 if (WinHttpGetIEProxyConfigForCurrentUser(&proxyConfig)) {
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63 if (proxyConfig.fAutoDetect) {
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64 // TODO Handle this
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65 qDebug() << "Autodetect is set";
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66 }
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67
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68 if (proxyConfig.lpszProxy || proxyConfig.lpszProxyBypass) {
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69 DEBUG << "Using proxies.";
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70 }
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71
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72 if (proxyConfig.lpszProxy) {
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73 *pHSession = WinHttpOpen(L"M13 "MYVERSION,
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74 WINHTTP_ACCESS_TYPE_NAMED_PROXY,
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75 proxyConfig.lpszProxy,
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76 proxyConfig.lpszProxyBypass, 0);
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77 }
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78 }
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79
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80 if (!*pHSession) {
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81 DEBUG << "No IE Proxy falling back to default proxy";
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82 *pHSession = WinHttpOpen(L"M13 "MYVERSION,
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83 WINHTTP_ACCESS_TYPE_DEFAULT_PROXY,
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84 WINHTTP_NO_PROXY_NAME,
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85 WINHTTP_NO_PROXY_BYPASS, 0);
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86 }
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87 // Cleanup
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88 if (proxyConfig.lpszAutoConfigUrl) {
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89 GlobalFree(proxyConfig.lpszAutoConfigUrl);
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90 }
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91
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92 if (proxyConfig.lpszProxy) {
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93 GlobalFree(proxyConfig.lpszProxy);
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94 }
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95
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96 if (proxyConfig.lpszProxyBypass) {
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97 GlobalFree(proxyConfig.lpszProxyBypass);
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98 }
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99 return *pHSession;
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100 }
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101
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102
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103 /** @brief initialize a connection in the session
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104 *
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105 * @param[in] HSession the session to work in.
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106 * @param[inout] *pHConnect pointer to the connection.
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107 * @param[in] url pointer to the URL in wchar representation.
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108 *
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109 * On error call getLastError to get extended error information.
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110 *
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111 * @returns True on success, false on error.
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112 */
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113 bool initializeConnection(HINTERNET hSession, HINTERNET *pHConnect,
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114 LPCWSTR url)
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115 {
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116 DEBUG;
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117 if (!hSession || !pHConnect) {
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118 SetLastError(ERROR_INVALID_PARAMETER);
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119 return false;
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120 }
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121 // Initialize connection. No request is done here.
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122 *pHConnect = WinHttpConnect(hSession, url,
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123 INTERNET_DEFAULT_HTTPS_PORT, 0);
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124
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125 return *pHConnect;
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126 }
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127
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128 /** @brief Create a request
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129 *
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130 * @param[in] HSession the session to work in.
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131 * @param[in] HConnect the connection to use.
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132 * @param[inout] *pHRequest pointer to the request structure to be filled.
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133 * @param[in] requestType the HTTP request to be made default is GET
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134 * @param[in] resource pointer to the resource to request in wchar
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135 * representation.
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136 *
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137 * On error call getLastError to get extended error information.
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138 * This function still does not do any networking but only initializes
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139 * it.
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140 *
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diff changeset
141 * @returns True on success, false on error.
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Andre Heinecke <aheinecke@intevation.de>
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diff changeset
142 */
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Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
143
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Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
144 bool createRequest(HINTERNET hSession, HINTERNET hConnect,
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diff changeset
145 HINTERNET *pHRequest, LPCWSTR requestType, LPCWSTR resource)
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Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
146 {
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Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
147 DEBUG;
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Andre Heinecke <aheinecke@intevation.de>
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diff changeset
148 if (!hSession || !hConnect || !pHRequest) {
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Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
149 SetLastError(ERROR_INVALID_PARAMETER);
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Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
150 return false;
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parents:
diff changeset
151 }
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diff changeset
152
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diff changeset
153 *pHRequest = WinHttpOpenRequest(hConnect, requestType, resource,
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parents:
diff changeset
154 NULL, WINHTTP_NO_REFERER,
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Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
155 WINHTTP_DEFAULT_ACCEPT_TYPES,
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Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
156 WINHTTP_FLAG_SECURE);
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parents:
diff changeset
157 return *pHRequest;
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parents:
diff changeset
158 }
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parents:
diff changeset
159
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Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
160 void Downloader::run() {
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Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
161 BOOL bResults = FALSE;
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parents:
diff changeset
162 HINTERNET hSession = NULL,
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parents:
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163 hConnect = NULL,
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Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
164 hRequest = NULL;
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165
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Andre Heinecke <aheinecke@intevation.de>
parents:
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166 SYSTEMTIME lastModified;
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parents:
diff changeset
167 DWORD sizeOfSystemtime = sizeof (SYSTEMTIME);
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Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
168
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diff changeset
169 memset(&lastModified, 0, sizeof (SYSTEMTIME));
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Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
170
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Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
171 if (!openSession(&hSession)) {
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Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
172 DEBUG << "Failed to open session: " << getLastErrorMsg();
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parents:
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173 return;
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Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
174 }
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Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
175
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Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
176 if (!initializeConnection(hSession, &hConnect, L"www.intevation.de")) {
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177 DEBUG << "Failed to initialize connection: " << getLastErrorMsg();
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Andre Heinecke <aheinecke@intevation.de>
parents:
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178 goto cleanup;
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Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
179 }
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Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
180
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Andre Heinecke <aheinecke@intevation.de>
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diff changeset
181 if (!createRequest(hSession, hConnect, &hRequest, L"GET", L"/")) {
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182 DEBUG << "Failed to create the request: " << getLastErrorMsg();
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Andre Heinecke <aheinecke@intevation.de>
parents:
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183 goto cleanup;
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Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
184 }
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Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
185
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Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
186 if (hRequest) {
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Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
187 DEBUG << "Doing Request";
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Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
188 bResults = WinHttpSendRequest(hRequest,
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Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
189 WINHTTP_NO_ADDITIONAL_HEADERS,
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Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
190 0, WINHTTP_NO_REQUEST_DATA, 0,
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Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
191 0, 0);
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Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
192 } else {
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Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
193 DEBUG << "Error: " << GetLastError();
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Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
194 }
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Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
195
7e2f14c7aba2 Split up downloader component and further implement it
Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
196
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Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
197 if (bResults) {
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Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
198 DEBUG << "Recieving Response";
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Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
199 bResults = WinHttpReceiveResponse(hRequest, NULL);
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Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
200 } else {
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Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
201 DEBUG << "Error: " << GetLastError();
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Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
202 }
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Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
203
7e2f14c7aba2 Split up downloader component and further implement it
Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
204 if (bResults) {
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Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
205 DEBUG << "Querying Headers";
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Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
206 bResults = WinHttpQueryHeaders(hRequest,
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Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
207 WINHTTP_QUERY_LAST_MODIFIED |
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Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
208 WINHTTP_QUERY_FLAG_SYSTEMTIME,
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Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
209 NULL,
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Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
210 &lastModified,
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Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
211 &sizeOfSystemtime,
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Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
212 WINHTTP_NO_HEADER_INDEX);
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Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
213 } else {
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Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
214 DWORD errCode = GetLastError();
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Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
215 switch (errCode) {
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Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
216 case ERROR_WINHTTP_HEADER_NOT_FOUND:
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Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
217 DEBUG << "Header not found";
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Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
218 break;
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Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
219 case ERROR_WINHTTP_INCORRECT_HANDLE_STATE:
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Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
220 DEBUG << "Incorrect handle state";
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Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
221 break;
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Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
222 case ERROR_WINHTTP_INCORRECT_HANDLE_TYPE:
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Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
223 DEBUG << "Incorrect handle type";
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Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
224 break;
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Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
225 case ERROR_WINHTTP_INTERNAL_ERROR:
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Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
226 DEBUG << "Internal error";
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Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
227 break;
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Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
228 case ERROR_NOT_ENOUGH_MEMORY:
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Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
229 DEBUG << "OOM";
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Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
230 break;
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Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
231 default:
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Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
232 DEBUG << "Error: " << getLastErrorMsg();
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Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
233 }
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Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
234 }
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Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
235
7e2f14c7aba2 Split up downloader component and further implement it
Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
236 DEBUG << "Last modified year: " << lastModified.wYear;
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Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
237
7e2f14c7aba2 Split up downloader component and further implement it
Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
238
7e2f14c7aba2 Split up downloader component and further implement it
Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
239 if (!bResults) {
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Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
240 // Report any errors.
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Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
241 DEBUG << "Error" << GetLastError();
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Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
242 emit error(tr("Unknown Problem when connecting"), Unknown);
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Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
243 }
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Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
244 cleanup:
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Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
245 if (hRequest) {
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Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
246 WinHttpCloseHandle(hRequest);
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Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
247 }
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Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
248
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Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
249 if (hConnect) {
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Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
250 WinHttpCloseHandle(hConnect);
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Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
251
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Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
252 }
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Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
253
7e2f14c7aba2 Split up downloader component and further implement it
Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
254 if (hSession) {
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Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
255 WinHttpCloseHandle(hSession);
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Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
256 }
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Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
257 return;
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Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
258 }
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Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
259 #endif
http://wald.intevation.org/projects/trustbridge/