cppCORE/HttpRequestHandler.h at master · imgag/cppCORE · GitHub

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#ifndef HTTPREQUESTHANDLER_H
#define HTTPREQUESTHANDLER_H

#include "cppCORE_global.h"
#include <QObject>
#include <QString>
#include <QSslError>
#include <QNetworkAccessManager>
#include <QNetworkReply>
#include <QHttpMultiPart>
#include <QAuthenticator>

using HttpHeaders = QMap<QByteArray, QByteArray>;

struct CPPCORESHARED_EXPORT RequestUrlParams
		: public QMap<QByteArray, QByteArray>
{
	QString asString()
	{
		QString output;
		QMap<QByteArray, QByteArray>::iterator i;
		for (i = begin(); i != end(); ++i)
		{
			if (!output.isEmpty()) output += "&";
			output += i.key() + "=" + i.value();
		}
		return "?" + output;
	}
};

struct CPPCORESHARED_EXPORT ServerReply
{
    int status_code = 200;
    QMap<QByteArray, QByteArray> headers;
    QByteArray body;

	void clear()
	{
		status_code = 200;
		headers.clear();
		body.clear();
	}
};

//Helper class for HTTP(S) communication
class CPPCORESHARED_EXPORT HttpRequestHandler
		: public QObject
{
	Q_OBJECT

public:
	//Constructor
	HttpRequestHandler(QObject* parent=0);

	//Returns basic headers used for all get/post requests. Additional headers that are only used for one request can be given in the get/post methods.
	const HttpHeaders& headers() const;
	//Adds/overrides a basic header.
	void setHeader(const QByteArray& key, const QByteArray& value);
	//Disables automatic proxy determination and by that uses no proxy.
	void disableProxy();

	//Sets user/password for basic authentication
	void setCredentials(QString user, QString password);

	//Returns headers for a specific file (needed to get the size of a file without fetching its content)
    ServerReply head(QString url, const HttpHeaders& add_headers);
	//Performs GET request
    ServerReply get(QString url, const HttpHeaders& add_headers = HttpHeaders());
	//Performs PUT request (modifies existing resources)
    ServerReply put(QString url, const QByteArray& data, const HttpHeaders& add_headers = HttpHeaders());
	//Performs POST request
    ServerReply post(QString url, const QByteArray& data, const HttpHeaders& add_headers = HttpHeaders());
	//Performs POST request for content type multipart
    ServerReply post(QString url, QHttpMultiPart* parts, const HttpHeaders& add_headers = HttpHeaders());

	//returns the proxy host used for the given URL.
	static QString proxyForUrl(QString url);

private slots:
	//Handles SSL errors (by ignoring them)
	void handleSslErrors(QNetworkReply*, const QList<QSslError>&);
	//Handler for basic authentication. Throws an exception if called and no credentials were provided.
	void authenticationRequired(QNetworkReply* reply, QAuthenticator* authenticator);

private:
	QString networkErrorAsString(QNetworkReply::NetworkError error);
	QNetworkAccessManager nmgr_;
	HttpHeaders headers_;
	QString user_;
	QString password_;
};

#endif // HTTPREQUESTHANDLER_H