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annotate ui/downloader.h @ 531:dec797c7230c

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Fix usage of OU / O
author Andre Heinecke <aheinecke@intevation.de>
date Tue, 29 Apr 2014 15:02:31 +0000
parents 5834b340c54c
children d1c951b3012d
rev   line source
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1 /* Copyright (C) 2014 by Bundesamt für Sicherheit in der Informationstechnik
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2 * Software engineering by Intevation GmbH
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3 *
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4 * This file is Free Software under the GNU GPL (v>=2)
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5 * and comes with ABSOLUTELY NO WARRANTY!
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6 * See LICENSE.txt for details.
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7 */
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8 #ifndef DOWNLOADER_H
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9 #define DOWNLOADER_H
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10 /**
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11 * @file downloader.h
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12 * @brief High level API to download necessary data.
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13 *
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14 */
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15
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16 #include <QThread>
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17 #include <QDateTime>
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18 #include <QString>
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19 #include <QByteArray>
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20
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21 #include "sslconnection.h"
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22
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23 class Downloader: public QThread
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24 {
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25 Q_OBJECT
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26
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27 public:
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28 /**
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29 * @brief Construct a downloader with a specific certificate
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30 *
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31 * The downloader will check the last-modified date of the
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32 * certificate list / sw on the server at the specified url
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33 * and download those accordingly. If newestSW or newestList is
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34 * are valid datetimes only files modified after the respective date
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35 * are downloaded.
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36 *
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37 * Downloaded files are placed in QStandardPaths::DataLocation
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38 *
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39 * @param[in] parent the parent object.
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40 * @param[in] url the Url to download data from
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41 * @param[in] certificate optional certificate to validate https connection
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42 * @param[in] newestSW datetime after which software should be downloaded
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43 * @param[in] newestList datetime after which the list should be downloaded
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44 * @param[in] resourceSW the path where the software is to be found
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45 * @param[in] resourceList the path where the list is to be found
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46 */
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47 Downloader(QObject* parent, const QString& url,
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48 const QByteArray& certificate = QByteArray(),
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49 const QDateTime& newestSW = QDateTime(),
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50 const QDateTime& newestList = QDateTime(),
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51 const QString& resourceSW = QString(),
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52 const QString& resourceList = QString(),
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53 bool downloadSW = true);
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54
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55 ~Downloader();
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56
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57 /**
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58 * @brief get the directory where the downloader saves data
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59 *
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60 * If the directory does not exist this function ensures that it
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61 * is created.
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62 *
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63 * @returns The directory in which downloaded files are placed.
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64 **/
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65 QString getDataDirectory();
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66
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67 /**
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68 * @brief get the current error state
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69 *
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70 * @returns The current error state.
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71 **/
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72 SSLConnection::ErrorCode getErrorState();
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73
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74 protected:
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75 void run();
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76
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77 private:
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78 QDateTime mLastModSW;
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79 QDateTime mLastModList;
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80
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81 QString mResourceSW;
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82 QString mResourceList;
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83
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84 bool mDownloadSW;
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85
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86 SSLConnection mSSLConnection;
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87
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88 /** @brief get the last modified header of a resource.
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89 *
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90 * Connection should be established beforehand.
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91 * Modifies the error state.
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92 *
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93 * @param[in] resource The resource to check
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94 *
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95 * @returns the last modified date or a null datetime in case of errors
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96 */
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97 QDateTime getLastModifiedHeader(const QString &resource);
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98
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99 /** @brief Download resource
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100 *
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101 * Download a resource with the established connection.
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102 * Modifies the error state.
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103 *
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104 * @param[in] resource the resource to download
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105 * @param[in] filename where the file should be saved.
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106 * @param[in] maxSize maximum amount of bytes to download
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107 *
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108 * @returns True if the download was successful.
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109 */
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110 bool downloadFile(const QString &resource, const QString &filename,
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111 size_t maxSize);
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112 /**
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113 * @brief parses the Headers of a repsonse.
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114 *
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115 * This removes the headers from the byte array passed as
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116 * parameter.
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117 *
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118 * @param[inout] data: The response to parse.
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119 *
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120 * @returns: A map of the header fields. Or an empty map on error.
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121 */
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122 QMap<QString, QString> parseHeaders(QByteArray *data);
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123
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124 Q_SIGNALS:
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125 /**
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126 * @brief software update is available
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127 */
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128 void newSoftwareAvailable(const QString &fileName,
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129 const QDateTime &lastMod);
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130
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131 /**
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132 * @brief new certificate list available
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133 */
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134 void newListAvailable(const QString &fileName, const QDateTime &lastMod);
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135
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136 /**
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137 * @brief Some progress has been made.
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138 *
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139 * @param[out] message: A message to show. Can be empty.
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140 * @param[out] current: Value of current progress.
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141 * @param[out] total: Total value of possible progress
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142 */
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143 void progress(const QString &message, int current, int total);
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144
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145 /**
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146 * @brief An error happened
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147 *
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148 * @param[out] message: A message to show. Can be empty.
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149 * @param[out] errorCode: ErrorCode of this error.
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150 */
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151 void error(const QString &message, SSLConnection::ErrorCode error);
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152
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153 /**
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154 * @brief Found the last modified date for software.
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155 *
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156 * @param[out] date The last modified date.
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157 */
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158 void lastModifiedDate(const QDateTime &date);
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159 };
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160 #endif
http://wald.intevation.org/projects/trustbridge/