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comparison ui/downloader.h @ 15:95e1b6edf2fc

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Implement more downloader functionality for Windows
author Andre Heinecke <aheinecke@intevation.de>
date Wed, 19 Feb 2014 10:45:06 +0000
parents fe39d93f1261
children 62cd56cea09b
comparison
equal deleted inserted replaced
14:58d51a91d448 15:95e1b6edf2fc
7 */ 7 */
8 8
9 #include <QThread> 9 #include <QThread>
10 #include <QString> 10 #include <QString>
11 #include <QByteArray> 11 #include <QByteArray>
12 #include <QDateTime>
13
14 #ifdef Q_OS_WIN
15 #include <windows.h>
16 #include <winhttp.h>
17 #endif
18
12 19
13 class Downloader: public QThread 20 class Downloader: public QThread
14 { 21 {
15 Q_OBJECT 22 Q_OBJECT
16 23
17 public: 24 public:
18 /** 25 /**
19 * @brief Construct a downloader to download data from url 26 * @brief Construct a downloader with a specific certificate
20 * 27 *
21 * Takes the builtin certificate for https verification. 28 * The downloader will check the last-modified date of the
29 * certificate list / sw on the server at the specified url
30 * and download those accordingly. If newestSW or newestList is
31 * are valid datetimes only files modified after the respective date
32 * are downloaded.
22 * 33 *
23 * @param[in] parent the parent object. 34 * Downloaded files are placed in QStandardPaths::DataLocation
24 * @param[in] url the Url to download data from.
25 */
26 Downloader(QObject* parent, const QString& url);
27
28 /**
29 * @brief Construct a downloader with a specific certificate
30 * 35 *
31 * @param[in] parent the parent object. 36 * @param[in] parent the parent object.
32 * @param[in] url the Url to download data from 37 * @param[in] url the Url to download data from
33 * @param[in] certificate to accept https connection from 38 * @param[in] certificate optional certificate to validate https connection
39 * @param[in] newestSW datetime after which software should be downloaded
40 * @param[in] newestList datetime after which the list should be downloaded
34 */ 41 */
35 Downloader(QObject* parent, const QString& url, 42 Downloader(QObject* parent, const QString& url,
36 const QByteArray& certificate); 43 const QByteArray& certificate = QByteArray(),
44 const QDateTime& newestSW = QDateTime(),
45 const QDateTime& newestList = QDateTime());
37 46
38 enum Status {
39 NewSoftwareAvailable, // A Software Update has been downloaded
40 NewListAvailable, // A certificate list has been downloaded
41 UpToDate, // Nothing changed
42 Error // An error happened
43 };
44 47
45 enum ErrorCode { 48 enum ErrorCode {
46 NoConnection, 49 NoConnection,
47 InvalidCertificate, 50 InvalidCertificate,
48 ConnectionLost, 51 ConnectionLost,
49 Timeout, 52 Timeout,
50 Unknown 53 ErrUnknown
51 }; 54 };
52 55
53 /** 56 /**
54 * @brief Construct a downloader with a specific certificate 57 * @brief get the directory where the downloader saves data
55 * 58 *
56 * @param[in] url the Url to download data from 59 * If the directory does not exist this function ensures that it
57 * @param[in] certificate to accept https connection from 60 * is created.
58 */ 61 *
59 QString getDownloadedFileName(); 62 * @returns The directory in which downloaded files are placed.
63 **/
64 QString getDataDirectory();
65
60 66
61 protected: 67 protected:
62 void run(); 68 void run();
63 69
64 private: 70 private:
65 QString mUrl; 71 QString mUrl;
66 QByteArray mCert; 72 QByteArray mCert;
67 73
74 QDateTime mLastModSW;
75 QDateTime mLastModList;
76
77 #ifdef Q_OS_WIN
78 /** @brief Download a file from the Internet
79 *
80 * @param[in] HSession the session to work in.
81 * @param[in] HConnect the connection to use.
82 * @param[in] resource the resource to download.
83 * @param[in] filename where the file should be saved.
84 * @param[in] maxSize maximum amount of bytes to download
85 *
86 * @returns True if the download was successful.
87 */
88 bool downloadFile(HINTERNET hSession, HINTERNET hConnect,
89 LPCWSTR resource, const QString &filename, DWORD maxSize);
90
91 /** @brief get the last modified header of a resource.
92 *
93 * On error call getLastError to get extended error information.
94 * This function still does not do any networking but only initializes
95 * it.
96 *
97 * @param[in] HSession the session to work in.
98 * @param[in] HConnect the connection to use.
99 * @param[in] resource the resource to check the last-modified date on
100 *
101 * @returns the last modified date or a null datetime in case of errors
102 */
103 QDateTime getLastModifiedHeader(HINTERNET hSession,
104 HINTERNET hConnect, LPCWSTR resource);
105
106 /** @brief verify that the certificate of the request matches
107 *
108 * Validates the certificate against the member variable certificate
109 *
110 * @param[in] hRequest: The request from which to get the certificate
111 *
112 * @returns True if the certificate exactly matches the one in hRequest
113 */
114
115 bool verifyCertificate(HINTERNET hRequest);
116 #endif
117
68 Q_SIGNALS: 118 Q_SIGNALS:
119 /**
120 * @brief software update is available
121 */
122 void newSoftwareAvailable(const QString &fileName,
123 const QDateTime &lastMod);
124
125 /**
126 * @brief new certificate list available
127 */
128 void newListAvailable(const QString &fileName, const QDateTime &lastMod);
129
69 /** 130 /**
70 * @brief Some progress has been made. 131 * @brief Some progress has been made.
71 * 132 *
72 * @param[out] message: A message to show. Can be empty. 133 * @param[out] message: A message to show. Can be empty.
73 * @param[out] current: Value of current progress. 134 * @param[out] current: Value of current progress.
78 /** 139 /**
79 * @brief An error happened 140 * @brief An error happened
80 * 141 *
81 * @param[out] message: A message to show. Can be empty. 142 * @param[out] message: A message to show. Can be empty.
82 * @param[out] errorCode: ErrorCode of this error. 143 * @param[out] errorCode: ErrorCode of this error.
83 * @param[out] total: Total value of possible progress.
84 */ 144 */
85 void error(const QString &message, ErrorCode error); 145 void error(const QString &message, ErrorCode error);
86 }; 146 };
87 #endif 147 #endif
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