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e1ac00b860
.. Makes it easier to identify code that has been snaffled in from other repositories and check licensing .. The httpserver is now no longer optional, since it is delivered as contributed source.
88 lines
2.5 KiB
C++
88 lines
2.5 KiB
C++
/**
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@file
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@author Stefan Frings
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*/
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#ifndef STATICFILECONTROLLER_H
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#define STATICFILECONTROLLER_H
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#include <QCache>
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#include <QMutex>
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#include "httpglobal.h"
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#include "httprequest.h"
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#include "httpresponse.h"
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#include "httprequesthandler.h"
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/**
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Delivers static files. It is usually called by the applications main request handler when
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the caller request a path that is mapped to static files.
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<p>
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The following settings are required in the config file:
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<code><pre>
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path=../docroot
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encoding=UTF-8
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maxAge=60000
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cacheTime=60000
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cacheSize=1000000
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maxCachedFileSize=65536
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</pre></code>
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The path is relative to the directory of the config file. In case of windows, if the
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settings are in the registry, the path is relative to the current working directory.
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<p>
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The encoding is sent to the web browser in case of text and html files.
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<p>
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The cache improves performance of small files when loaded from a network
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drive. Large files are not cached. Files are cached as long as possible,
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when cacheTime=0. The maxAge value (in msec!) controls the remote browsers cache.
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<p>
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Do not instantiate this class in each request, because this would make the file cache
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useless. Better create one instance during start-up and call it when the application
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received a related HTTP request.
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*/
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class DECLSPEC StaticFileController : public HttpRequestHandler {
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Q_OBJECT
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Q_DISABLE_COPY(StaticFileController)
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public:
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/** Constructor */
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StaticFileController(QSettings* settings, QObject* parent = NULL);
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/** Generates the response */
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void service(HttpRequest& request, HttpResponse& response);
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private:
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/** Encoding of text files */
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QString encoding;
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/** Root directory of documents */
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QString docroot;
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/** Maximum age of files in the browser cache */
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int maxAge;
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struct CacheEntry {
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QByteArray document;
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qint64 created;
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QByteArray filename;
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};
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/** Timeout for each cached file */
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int cacheTimeout;
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/** Maximum size of files in cache, larger files are not cached */
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int maxCachedFileSize;
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/** Cache storage */
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QCache<QString,CacheEntry> cache;
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/** Used to synchronize cache access for threads */
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QMutex mutex;
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/** Set a content-type header in the response depending on the ending of the filename */
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void setContentType(QString file, HttpResponse& response) const;
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};
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#endif // STATICFILECONTROLLER_H
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