Question

我试图使用一些Json数据来服务HttpListenerResponse，但在写入HttpListenerResponse输出流时不断收到异常。

首先设置响应头，然后设置contentLenght，最后将数据写入输出流。

# If requested resource exists as a file or directory go to it
RewriteCond %{REQUEST_FILENAME} -f [OR]
RewriteCond %{REQUEST_FILENAME} -d
RewriteRule (.*) - [L]

# Else rewrite requests for non-existent resources to /index.php
RewriteRule (.*) /? [L]

这导致 writer.Write（endpointResponse.Payload）或 response.OutputStream.Write（endpointResponse.Payload，0，endpointResponse.Payload.Length）中的异常

两者都抛出相同的HttpListenerExceptoin，消息为{＆＃34;参数不正确＆＃34;}和ErrorCode 87。

      response.StatusCode = endpointResponse.Status;
      response.ContentType = endpointResponse.ContentType;
      response.ContentLength64 = endpointResponse.Payload.Length;
       //response.OutputStream.Write(endpointResponse.Payload, 0, endpointResponse.Payload.Length); // Throws same exception
        using (var output = response.OutputStream)
        {
          using (var writer = new BinaryWriter(output))
          {
            writer.Write(endpointResponse.Payload); // Throws exception here.
            writer.Flush();
          }
        }
        response.OutputStream.Close();

有什么想法吗？

Answer 1

更改代码的顺序，似乎有效。因此，不要将数据前的标头写入OutputStream

    response.ContentLength64 = endpointResponse.Payload.Length;
    response.OutputStream.Write(endpointResponse.Payload, 0, endpointResponse.Payload.Length);
    response.OutputStream.Close();

    foreach (var endpointParameter in endpointResponse.Headers)
    {
        response.AddHeader(endpointParameter.Key, endpointParameter.Value);
    }
    response.StatusCode = endpointResponse.Status;
    response.ContentType = endpointResponse.ContentType;

似乎可以做到这一点。

知道为什么吗？

HttpListenerException＆＃34;参数不正确＆＃34;

1 个答案: