QHttpServer, GET vs POST



  • Hi all, I'm trying to put a simple HTTP server in my Qt5 application.
    I'm actually using QHttpServer because of it's semplicity.

    This is the code:
    @
    ...
    QHttpServer server = new QHttpServer;
    server->listen(QHostAddress::Any, 5001);
    connect(server, SIGNAL(newRequest(QHttpRequest
    , QHttpResponse*)),
    this, SLOT(handle(QHttpRequest*, QHttpResponse*)));
    ...

    void MyObject::handle(QHttpRequest *req, QHttpResponse *resp)
    {
    qDebug() << req->path();
    qDebug() << req->remoteAddress();
    qDebug() << req->methodString();
    qDebug() << req->body().size();
    QUrlQuery url_query(req->url());
    qDebug() << url_query.queryItems();

    QString risposta_http;
    risposta_http = "&lt;html&gt;&lt;head>&lt;title&gt;Greeting App&lt;/title&gt;&lt;/head>&lt;body&gt;";
    risposta_http += "<b>YOUR IP: " + req->remoteAddress() + "<br><br></b>";
    risposta_http += "&lt;form name=\"input\" action=\"\" method=\"GET\"&gt;"
            "Username: &lt;input type=\"text\" name=\"user\"&gt;"
            "&lt;input type=\"submit\" value=\"Submit\"&gt;"
            "&lt;/form&gt; ";
    
    risposta_http += "&lt;/body&gt;&lt;/html>";
    resp->setHeader("Content-Length", QString::number(risposta_http.size()));
    resp->writeHead(200);
    resp->write(risposta_http);
    resp->end();
    

    }
    @

    This way when I point my browser to: localhost:5001 I get a simple HTTP form where I can put my name.
    The first time I connect to the web server I get the following "debug messages" in the top of "handle()":
    @
    "/"
    "127.0.0.1"
    "HTTP_GET"
    0
    ()
    @
    Then if I enter a name "Luca" and press "submit" in the browser I get this debugs:
    @
    "/"
    "127.0.0.1"
    "HTTP_GET"
    0
    (QPair("user","Luca") )
    @
    and this is what I expect.

    If I user POST instead of GET:
    @
    risposta_http += "<form name="input" action="" method="POST">"
    "Username: <input type="text" name="user">"
    "<input type="submit" value="Submit">"
    "</form> ";
    @

    I can't get the name I insert in the form:
    @
    (QPair("user","Luca") )
    @

    Can someone tell me why?

    Thanks



  • What is the value of "req->body().size()"?

    req->body() is a QByteArray. So, you need to parse the contents.



  • [quote author="TioRoy" date="1378267553"]What is the value of "req->body().size()"?

    req->body() is a QByteArray. So, you need to parse the contents.[/quote]

    Hi, as you see in the output I posted:
    @
    "/"
    "127.0.0.1"
    "HTTP_GET"
    0
    (QPair("user","Luca") )
    @

    the output of req->body().size() is 0 so there is nothing in it.

    This is strange because in QHttpServer source there is:
    @
    /*!
    * Post data
    */
    const QByteArray &body() const { return m_body; }
    @

    so I think this is useful when using POST method...


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