模拟form表单请求上传文件
2023-09-11 14:20:28 时间
发请求
public string CameraFileUpload(string url,string path,string serverPath,string uploadfileName) { System.Net.ServicePointManager.DefaultConnectionLimit = 200; System.GC.Collect(); HttpWebRequest request = WebRequest.Create(url) as HttpWebRequest; CookieContainer cookieContainer = new CookieContainer(); request.CookieContainer = cookieContainer; request.AllowAutoRedirect = true; request.KeepAlive = false; request.Method = "POST"; string boundary = DateTime.Now.Ticks.ToString("X"); // 随机分隔线 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); //请求头部信息 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()); request.Headers.Add("serverPath", serverPath); request.Headers.Add("uploadfileName", uploadfileName); 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(); //发送请求并获取相应回应数据 HttpWebResponse response = request.GetResponse() as HttpWebResponse; //直到request.GetResponse()程序才开始向目标网页发送Post请求 Stream instream = response.GetResponseStream(); StreamReader sr = new StreamReader(instream, Encoding.UTF8); //返回结果网页(html)代码 string content = sr.ReadToEnd(); if (request != null) { request.Abort(); request = null; } if (response != null) { response.Close(); response = null; } return content; }
处理请求:
protected void Page_Load(object sender, EventArgs e) { try { HttpPostedFile file = Request.Files[0]; string temp = Request.Form["temp"]; string serverPath = Request.Headers["serverPath"]; string uploadfileName = Request.Headers["uploadfileName"]; filePathCheck(serverPath); file.SaveAs(Server.MapPath(serverPath + "\\" + uploadfileName)); Response.Write("上传成功"); } catch (Exception ex) { Response.Write("上传失败 原因:" + ex.Message); } } public void filePathCheck(string path) { if (!Directory.Exists(Server.MapPath(path))) Directory.CreateDirectory(Server.MapPath(path)); }
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