从 QNetworkReply 读取未解码的数据

Question

是否可以从 QNetworkReply 读取未解码的数据？

响应使用 gzip 编码（Content-Encoding: gzip HTTP 标头），但是当我调用 readAll() 方法时，它返回解码数据。我需要原始压缩数据，因为它是发送给我的。有什么想法吗？

Answer 1

您必须为自己的QNetworkRequest 设置标题：

 networkRequest.setRawHeader("Accept-Encoding", "gzip");

那么 Qt 不会在回复中为您解码。

我们可以在qhttpnetworkconnection.cpp的源码中看到QHttpNetworkConnectionPrivate::prepareRequest：

    // If the request had a accept-encoding set, we better not mess
    // with it. If it was not set, we announce that we understand gzip
    // and remember this fact in request.d->autoDecompress so that
    // we can later decompress the HTTP reply if it has such an
    // encoding.
    value = request.headerField("accept-encoding");
    if (value.isEmpty()) {
#ifndef QT_NO_COMPRESS
        request.setHeaderField("Accept-Encoding", "gzip");
        request.d->autoDecompress = true;
#else
        // if zlib is not available set this to false always
        request.d->autoDecompress = false;
#endif
    }