Post some data onto the local server by QNetworkAccessManager(Qt5)

**stereoMatching** · 9th March 2014, 11:52

Trying to post the paramaters onto the server but have no avail(following is my folder)

My file resides(my local host == C:\wamp\www)
https://farm4.staticflickr.com/3544/...ff858f14_c.jpg

bridge.html

Qt Code:

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<html>
  <form action="general_query.php" method="post">  
     <input type="text" name="db_server">
	 <input type="text" name="db_user">
	 <input type="text" name="db_password">
	 <input type="text" name="db_database">
	 <input type="text" name="query_message">
  </form> 
</html>

<html>
  <form action="general_query.php" method="post">  
     <input type="text" name="db_server">
	 <input type="text" name="db_user">
	 <input type="text" name="db_password">
	 <input type="text" name="db_database">
	 <input type="text" name="query_message">
  </form> 
</html>

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general_query.php

Qt Code:

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<?php
 
$response = array();
$response["server"] = _$POST['db_server'];
$response["user"] = _$POST['db_user'];
$response["password"] = _$POST['db_password'];
$response["db"] = _$POST['db_database'];
$response["query_message"] = _$POST['query_message'];
echo($response);
?>

<?php

$response = array();
$response["server"] = _$POST['db_server'];
$response["user"] = _$POST['db_user'];
$response["password"] = _$POST['db_password'];
$response["db"] = _$POST['db_database'];
$response["query_message"] = _$POST['query_message'];
echo($response);
?>

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main.cpp

Qt Code:

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#include "MainWindow.hpp"
#include <QApplication>
 
#include <QDebug>
#include <QByteArray>
#include <QEventLoop>
#include <QNetworkReply>
#include <QTextCodec>
#include <QUrl>
#include <QUrlQuery>
 
int main(int argc, char *argv[])
{
 
   QNetworkRequest request("http://127.0.0.1/bridge/bridge.html");
    request.setHeader(QNetworkRequest::ContentTypeHeader,
                      "application/x-www-form-urlencoded");
 
    QUrlQuery query;
    query.addQueryItem("db_database", "a");
    query.addQueryItem("db_password", "b");
    query.addQueryItem("db_server", "c");
    query.addQueryItem("db_user", "d");
    query.addQueryItem("query_message", "e");
 
    QUrl post_data;
    post_data.setQuery(query);
 
    QNetworkAccessManager network_manager;
    auto network_reply = network_manager.post(request,
                                               query.query().toUtf8());
 
    QEventLoop loop;
    connect(network_reply, SIGNAL(finished()), &loop, SLOT(quit()));
    loop.exec();
 
    QByteArray raw_data;
    if(network_reply->error() == QNetworkReply::NoError){
         raw_data = network_reply->readAll();
    }else{
        qDebug()<<network_reply->errorString();
    }
 
    qDebug()<<QTextCodec::codecForHtml(raw_data)->toUnicode(raw_data);
 
}

#include "MainWindow.hpp"
#include <QApplication>

#include <QDebug>
#include <QByteArray>
#include <QEventLoop>
#include <QNetworkReply>
#include <QTextCodec>
#include <QUrl>
#include <QUrlQuery>

int main(int argc, char *argv[])
{

   QNetworkRequest request("http://127.0.0.1/bridge/bridge.html");
    request.setHeader(QNetworkRequest::ContentTypeHeader,
                      "application/x-www-form-urlencoded");

    QUrlQuery query;
    query.addQueryItem("db_database", "a");
    query.addQueryItem("db_password", "b");
    query.addQueryItem("db_server", "c");
    query.addQueryItem("db_user", "d");
    query.addQueryItem("query_message", "e");

    QUrl post_data;
    post_data.setQuery(query);
  
    QNetworkAccessManager network_manager;
    auto network_reply = network_manager.post(request,
                                               query.query().toUtf8());

    QEventLoop loop;
    connect(network_reply, SIGNAL(finished()), &loop, SLOT(quit()));
    loop.exec();

    QByteArray raw_data;
    if(network_reply->error() == QNetworkReply::NoError){
         raw_data = network_reply->readAll();
    }else{
        qDebug()<<network_reply->errorString();
    }

    qDebug()<<QTextCodec::codecForHtml(raw_data)->toUnicode(raw_data);

}

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The results are same as the texts of the bridge.html but not the json as I expected

expected results

Qt Code:

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{
    "server": "c"
    "user": "d"
    "password": "b"
    "db": "a"
    "query message": "e"
}

{
    "server": "c"
    "user": "d"
    "password": "b"
    "db": "a"
    "query message": "e"
}

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**anda_skoa** · 9th March 2014, 12:46

Shouldn't your query URL be the PHP script?

I.e. instead of

Qt Code:

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QNetworkRequest request("http://127.0.0.1/bridge/bridge.html");

QNetworkRequest request("http://127.0.0.1/bridge/bridge.html");

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using

Qt Code:

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QNetworkRequest request("http://127.0.0.1/bridge/general_query.php");

QNetworkRequest request("http://127.0.0.1/bridge/general_query.php");

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Cheers,
_

**stereoMatching** · 10th March 2014, 00:13

Originally Posted by anda_skoa

Shouldn't your query URL be the PHP script?

I.e. instead of

Qt Code:

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QNetworkRequest request("http://127.0.0.1/bridge/bridge.html");

QNetworkRequest request("http://127.0.0.1/bridge/bridge.html");

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using

Qt Code:

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QNetworkRequest request("http://127.0.0.1/bridge/general_query.php");

QNetworkRequest request("http://127.0.0.1/bridge/general_query.php");

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Cheers,
_

Thank you very much, I find out my errors.

first error, wrong php script

Qt Code:

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<?php
 
$response["response"] = array();
 
$result = array();
$result["server"] = $_POST['db_server'];
$result["user"] = $_POST['db_user'];
$result["password"] = $_POST['db_password'];
$result["database"] = $_POST['db_database'];
$result["message"] = $_POST['query_message'];
 
array_push($response["response"], $result);
 
echo json_encode($response);
?>

<?php

$response["response"] = array();

$result = array();
$result["server"] = $_POST['db_server'];
$result["user"] = $_POST['db_user'];
$result["password"] = $_POST['db_password'];
$result["database"] = $_POST['db_database'];
$result["message"] = $_POST['query_message'];
 
array_push($response["response"], $result);

echo json_encode($response);
?>

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second, the request url is incorrect

Qt Code:

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QNetworkRequest request("http://127.0.0.1/bridge/general_query.php");

QNetworkRequest request("http://127.0.0.1/bridge/general_query.php");

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third, I don't need QUrl, QUrlQuery is enough for the task

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