使用 HttpWebRequest 提交附件

本文关键字：提交 HttpWebRequest 使用 | 更新日期: 2023-09-27 18:34:28

>我正在尝试向 REST API 提交附件。 附件未正确提交。我相信我对请求做错了什么 

RunQueryimage("http://www.extremetech.com/wp-content/uploads/2012/12/Audi-A1.jpg);
public string RunQueryimage(string imagePath)
        {
            //do get request
            HttpWebRequest request = (HttpWebRequest)
                WebRequest.Create("https://iss.ontimenow.com/api/v2/incidents/");
            request.ContentType = "application/octet-stream";
            request.Method = "POST";
            var webClient = new WebClient();
            byte[] bytearr = webClient.DownloadData(imagePath);
            var filecontent = new ByteArrayContent(bytearr);
            // request.ContentLength = 0;
            if (filecontent != null)
            {
                using (StreamWriter writer = new StreamWriter(request.GetRequestStream()))
                {
                    writer.Write(filecontent);
                }
            }

            HttpWebResponse response = (HttpWebResponse)
                request.GetResponse();

            string result = string.Empty;
            using (StreamReader reader = new StreamReader(response.GetResponseStream()))
            {
                result = reader.ReadToEnd();
            }
            return result;

        }

使用 HttpWebRequest 提交附件

创建 Web 请求时，您已经打开了一个流。

更改此设置：

byte[] bytearr = webClient.DownloadData(imagePath);    
var filecontent = new ByteArrayContent(bytearr);
        // request.ContentLength = 0;
        if (filecontent != null)
        {
            using (StreamWriter writer = new StreamWriter(request.GetRequestStream()))
            {
                writer.Write(filecontent);
            }
        }

自：

 byte[] fileContent = webClient.DownloadData(imagePath);
        if (fileContent != null)
        {
            Stream requestStream = request.GetRequestStream();
            requestStream.Write(fileContent, 0, fileContent.Length);
            requestStream.Close();
        }
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