C++ QNetworkReply和301重定向

我有一个webviewer，只希望它能够访问我们的webapps，为了实现这一点，我在Qt应用程序中放置了一个php头。这很好，但有一个例外，那就是301永久移动状态代码。现代浏览器会自动为您重定向，但会在http请求的末尾添加“/”

当我们的web应用的URL被输入时，它当前需要尾部斜杠才能检测到标题，但我希望它也能检测到该标题，即使他们没有放置尾部斜杠

以下是我当前检索标题的方法：

QNetworkAccessManager *manager = new QNetworkAccessManager(this);
    QNetworkRequest request;
    request.setUrl(url);
    connect(manager, SIGNAL(finished(QNetworkReply*)), this, SLOT(onFinished(QNetworkReply*)));

    request.setRawHeader("User-Agent", "CytoViewer 1.0");
    request.setHeader(QNetworkRequest::ContentTypeHeader,"application/CytoViewer");
    QNetworkReply *reply = manager->get(request);
    reply->ignoreSslErrors();
    QEventLoop loop;

    connect(reply, SIGNAL(finished()), &loop, SLOT(quit()));
    loop.exec();
    qDebug() << "QLoop reply all: " << reply->readAll();
    qDebug() << "QLoop: " << reply->rawHeader("Cyto-Study-Manager");
    if(reply->rawHeader("OurWebApp") == "1"){
        //Header exists?(QEventLoop finish) Set arg[1]"url 'Found prouct: product header'"
        product = reply->rawHeader("Product");
        return true;
    } else {
        //Header doen't exist? Graceful error - not a valid PI product
        return false;
    }

长话短说，我正在发送两个网络请求，1）检查301 2）检查我们的应用程序头

在一个请求中是否有这样做的方法？我是否缺少自动执行此重定向的方法

问候

---

内森显然没有

有一个官方的HOWTO条目（不幸的是，死链接）

从上面的链接中提取：

void QNAMRedirect::replyFinished(QNetworkReply* reply) {
    /*
     * Reply is finished!
     * We'll ask for the reply about the Redirection attribute
     * http://doc.trolltech.com/qnetworkrequest.html#Attribute-enum
     */
    QVariant possibleRedirectUrl =
             reply->attribute(QNetworkRequest::RedirectionTargetAttribute);

    /* We'll deduct if the redirection is valid in the redirectUrl function */
    _urlRedirectedTo = this->redirectUrl(possibleRedirectUrl.toUrl(),
                                         _urlRedirectedTo);

    /* If the URL is not empty, we're being redirected. */
    if(!_urlRedirectedTo.isEmpty()) {
        QString text = QString("QNAMRedirect::replyFinished: Redirected to ")
                              .append(_urlRedirectedTo.toString());
        this->_textContainer->setText(text);

        /* We'll do another request to the redirection url. */
        this->_qnam->get(QNetworkRequest(_urlRedirectedTo));
    }
    else {
        /*
         * We weren't redirected anymore
         * so we arrived to the final destination...
         */
        QString text = QString("QNAMRedirect::replyFinished: Arrived to ")
                              .append(reply->url().toString());
        this->_textContainer->setText(text);
        /* ...so this can be cleared. */
        _urlRedirectedTo.clear();
    }
    /* Clean up. */
    reply->deleteLater();
}

QUrl QNAMRedirect::redirectUrl(const QUrl& possibleRedirectUrl,
                               const QUrl& oldRedirectUrl) const {
    QUrl redirectUrl;
    /*
     * Check if the URL is empty and
     * that we aren't being fooled into a infinite redirect loop.
     * We could also keep track of how many redirects we have been to
     * and set a limit to it, but we'll leave that to you.
     */
    if(!possibleRedirectUrl.isEmpty() &&
       possibleRedirectUrl != oldRedirectUrl) {
        redirectUrl = possibleRedirectUrl;
    }
    return redirectUrl;
}

如果您不使用Qt 6，请使用旧答案：

默认情况下不启用：

QNetworkRequest req(QUrl("https://example.com/"));
req.setAttribute(QNetworkRequest::FollowRedirectsAttribute, true);

---

我想可能没有办法，但不确定我是否遗漏了什么，谢谢你清理了@kfunk:）官方指南的链接被破坏了：（@DavidSánchez:更新了评论以反映这一点。不幸的是，维基内容在删除之前没有被移动：（你说旧是什么意思？对我来说它是新的。感谢你提到这一点，你保存了我的a**，我将从5.5更新到5.6以使其生效。此处快速更新：

QNetworkRequest:：FollowRedirectsAttribute

已被弃用，取而代之的是

QNetworkRequest:：RedirectPolicyAttribute

（检查）。

QNetworkRequest req(QUrl("https://example.com/"));
req.setAttribute(QNetworkRequest::FollowRedirectsAttribute, true);