使用QNetworkRequest正確的HTTP POST格式

Question

我試圖發送一個JSON查詢到一個Web服務，我繼續得到內部服務器錯誤作爲對查詢的響應。

這裏是我想要送：

POST /api/1.7/webservice.asmx HTTP/1.1 
Host: www.superService.com 
User-Agent: My app name v0.1 
X-Custom-User-Agent: My app name v0.1 
Content-Type: application/json 
Content-Length:81 

{"method":"AuthenticatePlain","loginName":"username@domain.com","password":"mypass"} 

這應該被髮送到https://www.superService.com/api/1.7/ssapi.asmx

在準備QNetworkRequest，使用什麼方法來插入行

POST /api/1.7/webservice.asmx HTTP/1.1？

QNetworkRequest對象中是否包含完整的頭文件？
JSON數據應該位於QNetworkRequest對象中還是作爲QNetworkAccessManager :: post（）方法的第二個參數添加到帖子中？

這裏是在on_btnLogin_clicked（）插槽我當前的代碼：

connect(m_qnam, SIGNAL(finished(QNetworkReply*)), 
       this, SLOT(handleNetworkData(QNetworkReply*))); 
    connect(m_qnam,SIGNAL(sslErrors(QNetworkReply*,QList<QSslError>)), 
       this, SLOT(handleSSLErrors(QNetworkReply*))); 

    QString baseString = ""; 
    baseString.append(QString("POST /api/1.7/webservice.asmx HTTP/1.1\r\n").toUtf8()); 
    baseString.append(QString("www.superService.com\r\n").toUtf8()); 
    baseString.append(QString("User-Agent: My app name v0.1\r\n").toUtf8()); 
    baseString.append(QString("X-Custom-User-Agent: My app name v0.1\r\n").toUtf8()); 
    baseString.append(QString("Content-Type: application/json\r\n").toUtf8()); 

    QString jsonString = QString("{"); 
    jsonString.append("\"method\":"); 
    jsonString.append("\"AuthenticatePlain\""); 
    jsonString.append(",\"loginName\":"); 
    jsonString.append("\"username@domain.com\""); 
    jsonString.append(",\"password\":"); 
    jsonString.append("\"mypass\""); 
    jsonString.append("}"); 

    QByteArray json = jsonString.toUtf8(); 

    baseString.append(QString("Content-Length:").toUtf8()); 
    baseString.append(QString::number(json.length())); 
    baseString.append("\r\n").toUtf8(); 
    baseString.append(QString("\r\n").toUtf8()); 
    baseString.append(json); 

    request = QNetworkRequest(QUrl("https://www.superService.com/api/1.7/ssapi.asmx")); 
    request.setRawHeader() 


    qDebug() << "Base String: "<< baseString; 


    m_qnam->post(request,baseString.toUtf8()); 

Answer 1

這不是寫你的HTTP請求的正確方法。以下代碼更正確：

connect(m_qnam, SIGNAL(finished(QNetworkReply*)), this, SLOT(handleNetworkData(QNetworkReply*))); 
connect(m_qnam,SIGNAL(sslErrors(QNetworkReply*,QList<QSslError>)), this, SLOT(handleSSLErrors(QNetworkReply*))); 

// Build your JSON string as usual 
QByteArray jsonString = "{\"method\":\"AuthenticatePlain\",\"loginName\":\"username@domain.com\",\"password\":\"mypass\"}"; 

// For your "Content-Length" header 
QByteArray postDataSize = QByteArray::number(jsonString.size()); 

// Time for building your request 
QUrl serviceURL("https://www.superService.com/api/1.7/ssapi.asmx"); 
QNetworkRequest request(serviceURL); 

// Add the headers specifying their names and their values with the following method : void QNetworkRequest::setRawHeader(const QByteArray & headerName, const QByteArray & headerValue); 
request.setRawHeader("User-Agent", "My app name v0.1"); 
request.setRawHeader("X-Custom-User-Agent", "My app name v0.1"); 
request.setRawHeader("Content-Type", "application/json"); 
request.setRawHeader("Content-Length", postDataSize); 

// Use QNetworkReply * QNetworkAccessManager::post(const QNetworkRequest & request, const QByteArray & data); to send your request. Qt will rearrange everything correctly. 
QNetworkReply * reply = m_qnam->post(request, jsonString);