HttpWebRequest 流中的错误超过了 Content-Length 字节大小

Question

这是将货物添加到 Orderhive API，身份验证是 AWS4 签名。这是完整的错误：要写入流的字节数超过指定的 Content-Length 字节大小。以下是导致错误的实现。

 var headers = new Dictionary<string, string>
                {
                    {AWS4SignerBase.X_Amz_Content_SHA256, contentHashString},
                    {"content-length", requestBody.Length.ToString()},
                    {"content-type", "application/json"},
                    {"id_token", _credentails.id_token},
                    {"X-Amz-Security-Token",  _credentails.session_token}
                };

public string InvokeHttpRequest(Uri endpointUri,
                                             string httpMethod,
                                             IDictionary<string, string> headers,
                                             string requestBody)
        {
            string responseBody = "";
            try
            {
                var request = ConstructWebRequest(endpointUri, httpMethod, headers);

                if (!string.IsNullOrEmpty(requestBody))
                {
                    var buffer = new byte[8192]; // arbitrary buffer size                        
                    var requestStream = request.GetRequestStream();
                    using (var inputStream = new MemoryStream(Encoding.UTF8.GetBytes(requestBody)))
                    {
                        var bytesRead = 0;
                        while ((bytesRead = inputStream.Read(buffer, 0, buffer.Length)) > 0)
                        {
                            requestStream.Write(buffer, 0, bytesRead);
                        }
                    }
                }

                responseBody = CheckResponse(request);
            }
            catch (WebException ex)
            {
                using (var response = ex.Response as HttpWebResponse)
                {
                    if (response != null)
                    {
                        var errorMsg = ReadResponseBody(response);
                        Console.WriteLine("\n-- HTTP call failed with exception '{0}', status code '{1}'", errorMsg, response.StatusCode);
                    }
                }
            }

            return responseBody;
        }



public HttpWebRequest ConstructWebRequest(Uri endpointUri,
                                                         string httpMethod,
                                                         IDictionary<string, string> headers)
        {
            var request = (HttpWebRequest)WebRequest.Create(endpointUri);
            request.Method = httpMethod;

            foreach (var header in headers.Keys)
            {
                // not all headers can be set via the dictionary
                if (header.Equals("host", StringComparison.OrdinalIgnoreCase))
                    request.Host = headers[header];
                else if (header.Equals("content-length", StringComparison.OrdinalIgnoreCase))
                    request.ContentLength = long.Parse(headers[header]);
                else if (header.Equals("content-type", StringComparison.OrdinalIgnoreCase))
                    request.ContentType = headers[header];
                else
                    request.Headers.Add(header, headers[header]);
            }

            return request;
        }

我不知道如何更改代码来解决此问题。请帮忙。谢谢。

Answer 1

您指定的内容长度似乎与您写入上游的字节数不兼容。

当您设置内容长度时：

"content-length", requestBody.Length.ToString()

您发送的内容如下：

Encoding.UTF8.GetBytes(requestBody)

此处字符串的 Length 及其 UTF8 二进制表示中的字节数不同。

请尝试这样设置内容长度：

"content-length", Encoding.UTF8.GetByteCount(requestBody).ToString()

HttpWebRequest 流中的错误超过了 Content-Length 字节大小

Error in HttpWebRequest stream exceed the Content-Length bytes size

c#

byte

httpwebrequest

outputstream