问题描述
我是 QT 的新手,我正在尝试为我的应用程序建立 REST 服务(GET 和 POST)。同时 GET 需求工作正常,我无法执行 POST 需求(结果我从服务器回复中得到:连接关闭错误)。您有什么建议吗?
构造函数:
{
net_acc_manager = new QNetworkAccessManager(this);
connect(net_acc_manager,&QNetworkAccessManager::finished,this,&MyApp::httpFinished);
}
POST,我得到的响应:失败,错误代码 #2。服务器错误解释:连接关闭
void MyApp::Post_demand()
{
QUrl url = QUrl("http://192.168.2.1/od/6040/00");
qnetworkrequest request(url);
request.setHeader(qnetworkrequest::ContentTypeHeader,"application/x-www-form-urlencoded");
QByteArray postdata="0000";
net_acc_manager->post(request,postdata);
qCDebug(log_hal) << Q_FUNC_INFO << "Request POST posted" << full_url.toString();
}
GET,那部分工作正常,输出:Http post 成功完成。
void MyApp::Get_demand()
{
QUrl url = QUrl("http://192.168.2.1/od/6040/00");
reply=net_acc_manager->get(qnetworkrequest(QUrl("http://192.168.2.1/od/6040/00")));
qCDebug(log_hal) << Q_FUNC_INFO << "Request GET posted" << full_url.toString();
}
HttpFinished 函数
void MyApp::httpFinished(QNetworkReply *n_reply)
{
qCDebug(log_hal) << Q_FUNC_INFO << "Http request finished. Status code:" << n_reply->attribute(qnetworkrequest::HttpStatusCodeAttribute).toInt();
if (n_reply->error()) {
qCCritical(log_hal) << Q_FUNC_INFO << "Status code:" << n_reply->attribute(qnetworkrequest::HttpStatusCodeAttribute).toInt();
qCCritical(log_hal) << Q_FUNC_INFO <<
QString("Failed,error code: #%1; Server error explanation: %2")
.arg(QString::number(n_reply->error()),n_reply->errorString().replace(QRegExp("\%20")," ")).tolatin1().data();
n_reply->deleteLater();
n_reply = Q_NULLPTR;
emit Failed();
return;
}
qCDebug(log_hal) << QString("Http post finished successfully. Reply Text: %1\nElapsed time: %2 ms")
.arg(QString(n_reply->readAll()),QString::number(timer->elapsed())).tolatin1().data();
//dummy read,to clear buffer
n_reply->readAll();
n_reply->deleteLater();
n_reply = Q_NULLPTR;
emit finished();
}
解决方法
毕竟我已经找到了问题和解决方案。问题似乎出在 POST 请求时发布字符串。
来自 POST 函数的行:
QByteArray postdata="0000";
实际上应该是:
QByteArray postdata("\"0000\"");
还是谢谢。