Question

我正在尝试在ProxyFeature中替换响应正文中的URL，但是我得到了一个编码正文。

代码如下：

Plugins.Add(new ProxyFeature(
          matchingRequests: req =>
          {
            return req.PathInfo.StartsWith("/proxy");
          },
          resolveUrl: (req) =>
          {
            string var = req.RawUrl.Replace("/proxy/", "");
            return var;
          })
      {
        IgnoreResponseHeaders = {
                    "X-Frame-Options"
                },
        TransformResponse = async (res, responseStream) =>
        {          
          using (var reader = new StreamReader(responseStream,Encoding.UTF8))
          {
            var responseBody = await reader.ReadToEndAsync();
            Console.WriteLine(responseBody);
            var replacedBody = responseBody.Replace("http://","/proxy/http://");
            replacedBody = replacedBody.Replace("https://", "/proxy/https://");

            return MemoryStreamFactory.GetStream(replacedBody.ToUtf8Bytes());
          }
        }

我不确定自己在做什么错，因为这或多或少是网站中示例代码的副本，只是做了些微改动。

结果应为任意，正文中的所有URL均应以 “ / proxy /”，并且应将其应用于用户导航到的任何URL。

值得一提的是，如果我删除“ TransformResponse”部分，此方法就足够好了。

关于我在这里做错什么的任何想法。

谢谢。

更新：

要返回的部分内容。在这种情况下，导航的网址为“ https://www.theverge.com”。

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fA?z?7Q?Y}??2?v????p<|dù?s???q????t?M?^0_???o?/??V???z?S?5??r-s?N?U?j?:??1Bo?Z?>?-?
??u??{{*v????Q?g??s4??       ;?$;?Q???A0??YFo/{:;6??{?q/;?????????G????s??.??g?E?????w??'wL{?Lw0?-¬?????~????p?u??TC?X??J?j??lW??Z??(???z?u?u????a?W???~?R?t{?J?Q??f?^?6k?R?X????]^M?3??_g?????Y? *????l?xp?sT
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Answer 1

输出乱码是因为返回的下游响应已压缩，但是您试图将其直接读取为字符串。

如果代理响应被压缩，则需要将其解压缩，进行任何字符串转换，然后再压缩回去，例如：

Plugins.Add(new ProxyFeature(
    matchingRequests: req => req.PathInfo.StartsWith("/proxy"),
    resolveUrl: req => req.RawUrl.Replace("/proxy/", ""))
{
    IgnoreResponseHeaders = { "X-Frame-Options" },
    TransformResponse = async (res, responseStream) => {
        var enc = res.GetHeader(HttpHeaders.ContentEncoding);
        var useStream = responseStream;
        if (enc != null)
            useStream = responseStream.Decompress(enc);

        using (var reader = new StreamReader(useStream,Encoding.UTF8))
        {
            var responseBody = await reader.ReadToEndAsync();
            var replacedBody = responseBody.Replace("http://","/proxy/http://");
            replacedBody = replacedBody.Replace("https://", "/proxy/https://");

            var bytes = replacedBody.ToUtf8Bytes();
            return new MemoryStream(enc != null ? bytes.CompressBytes(enc) : bytes);
        }
    }
});

如何在ServiceStack ProxyFeature中正确解码响应流？

1 个答案: