HttpClient中上傳檔案

上一篇主要是提到了HttpClient幫助類，這次針對於上傳檔案進行補充，僅做記錄

public static string HttpUploadFile(string url, string path)

        {

            // 設定引數

            HttpWebRequest request = WebRequest.Create(url) as HttpWebRequest;

            CookieContainer cookieContainer = new CookieContainer
 
();

            request.CookieContainer = cookieContainer;

            request.AllowAutoRedirect = true;

            request.Method = "PUT";

            string boundary = DateTime.Now.Ticks.ToString("X"); // 隨機分隔線

            request.ContentType = "multipart/form-data;charset=utf-8;boundary=" + boundary;
 


            byte[] itemBoundaryBytes = Encoding.UTF8.GetBytes("\r\n--" + boundary + "\r\n");

            byte[] endBoundaryBytes = Encoding.UTF8.GetBytes("\r\n--" + boundary + "--\r\n");
            int pos = path.LastIndexOf("\\");

            string fileName = path.Substring(pos + 1);
            //請求頭部資訊 
 


            StringBuilder sbHeader = new StringBuilder(string.Format("Content-Disposition:form-data;name=\"file\";filename=\"{0}\"\r\nContent-Type:application/octet-stream\r\n\r\n", fileName));

            byte[] postHeaderBytes = Encoding.UTF8.GetBytes(sbHeader.ToString());
            FileStream fs = new FileStream(path, FileMode.Open, FileAccess.Read);

            byte[] bArr = new byte[fs.Length];

            fs.Read(bArr, 0, bArr.Length);

            fs.Close();
            Stream postStream = request.GetRequestStream();

            postStream.Write(itemBoundaryBytes, 0, itemBoundaryBytes.Length);

            postStream.Write(postHeaderBytes, 0, postHeaderBytes.Length);

            postStream.Write(bArr, 0, bArr.Length);

            postStream.Write(endBoundaryBytes, 0, endBoundaryBytes.Length);

            postStream.Close();
            //傳送請求並獲取相應迴應資料

            HttpWebResponse response = request.GetResponse() as HttpWebResponse;

            //直到request.GetResponse()程式才開始向目標網頁傳送Post請求

            Stream instream = response.GetResponseStream();

            StreamReader sr = new StreamReader(instream, Encoding.UTF8);

            //返回結果網頁（html）程式碼

            string content = sr.ReadToEnd();

            return content;

        }