從HttpClient響應中刪除標頭

Question

使用HttpClient時遇到問題。 通話正常，我可以接聽電話，但無法正確接收內容。

我編寫的函數如下所示：

    public async Task<string> MakePostRequestAsync(string url, string data, CancellationToken cancel)
    {
        String res = String.Empty;

        using (HttpClient httpClient = new HttpClient())
        {
            ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12 | SecurityProtocolType.Tls11 | SecurityProtocolType.Tls;

            HttpContent content = new StringContent(data, Encoding.UTF8, "application/xml");
            httpClient.DefaultRequestHeaders.Authorization = getHeaders();
            httpClient.DefaultRequestHeaders.Add("Accept", "application/xml");
            httpClient.DefaultRequestHeaders.Add("User-Agent", "C#-AppNSP");
            httpClient.DefaultRequestHeaders.ExpectContinue = false;

            HttpResponseMessage response = await httpClient.PostAsync(url, content, cancel);
            response.EnsureSuccessStatusCode(); // Lanza excepción si no hay éxito

            res = await response.Content.ReadAsStringAsync();
            if (String.IsNullOrEmpty(res))
            {
                throw new Exception("Error: " + response.StatusCode);
            }
        }

        return res;
    }

我得到的響應字符串與此類似：

HTTP/1.1 0 nullContent-Type: application/xml;charset=UTF-8
Content-Length: 1263
Date: Tue, 02 Jul 2019 07:48:07 GMT
Connection: close

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<SeguimientoEnviosFechasResponse xsi:noNamespaceSchemaLocation="SeguimientoEnviosFechasResponse.xsd" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
    <Error>0</Error>
    <MensajeError></MensajeError>
    <SeguimientoEnvioFecha>
        <!-- more XML here -->
    </SeguimientoEnvioFecha>
</SeguimientoEnviosFechasResponse>

由於某些原因，此字符串包含標頭，因此當我嘗試反序列化它時，會出現錯誤。

如何在響應字符串中刪除此標頭？

Answer 1

您的服務器在響應正文中返回標頭。 最好在服務器端修復此問題，如果不可能，則應從響應中提取主體：

        var xml = res.Substring(res.IndexOf("<?xml", StringComparison.Ordinal));

Answer 2

您可以嘗試以下方法：

using (var receiveStream = response.GetResponseStream()) 
{
  using (var readStream = new StreamReader(receiveStream, Encoding.UTF8)) 
  {
    Console.WriteLine (readStream.ReadToEnd ());
  }
}