using System;
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using System.Collections.Generic;
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using System.IO;
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using System.Linq;
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using System.Net;
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using System.Text;
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using System.Threading.Tasks;
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namespace IStation.Untity
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{
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/// <summary>
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/// http文件辅助类
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/// </summary>
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public class HttpFileHelper
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{
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/// <summary>
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/// 上传文件
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/// </summary>
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public static string Upload(string url, string filePath)
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{
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if (string.IsNullOrEmpty(url))
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return default;
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if (string.IsNullOrEmpty(filePath))
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return default;
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if (!System.IO.File.Exists(filePath))
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return default;
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try
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{
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var fileInfo = new System.IO.FileInfo(filePath);
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string boundary = "----" + DateTime.Now.Ticks.ToString("x");// 边界符
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byte[] beginBoundaryBytes = Encoding.UTF8.GetBytes("--" + boundary + "\r\n"); // 边界符开始。【☆】右侧必须要有 \r\n 。
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byte[] endBoundaryBytes = Encoding.UTF8.GetBytes("\r\n--" + boundary + "--\r\n"); // 边界符结束。【☆】两侧必须要有 --\r\n 。
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var fileFormTemplate = "Content-Disposition: form-data; name=\"{0}\"; filename=\"{1}\"\r\n" + "Content-Type: application/octet-stream\r\n\r\n";//文件模板
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HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
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request.ContentType = string.Format("multipart/form-data; boundary={0}", boundary);
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request.Method = WebRequestMethods.Http.Post;
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request.AllowWriteStreamBuffering = false;
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//request.KeepAlive = true;
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request.Timeout = -1;
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long contentLength = 0;
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var fileFormItem = string.Format(fileFormTemplate, "file", fileInfo.Extension);
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byte[] fileFormItemBytes = Encoding.UTF8.GetBytes(fileFormItem);
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contentLength += beginBoundaryBytes.Length;
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contentLength += fileFormItemBytes.Length;
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var fileStream = new FileStream(filePath, FileMode.Open, FileAccess.Read);
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contentLength += fileStream.Length;
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contentLength += endBoundaryBytes.Length;
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request.ContentLength = contentLength;
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var requestStream = request.GetRequestStream();
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requestStream.Write(beginBoundaryBytes, 0, beginBoundaryBytes.Length);
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requestStream.Write(fileFormItemBytes, 0, fileFormItemBytes.Length);
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//每次上传4M
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byte[] buffer = new Byte[checked((uint)Math.Min(4096, (int)fileStream.Length))];
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int bytesRead = 0;
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while ((bytesRead = fileStream.Read(buffer, 0, buffer.Length)) != 0)
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{
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requestStream.Write(buffer, 0, bytesRead);
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}
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requestStream.Write(endBoundaryBytes, 0, endBoundaryBytes.Length);
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fileStream.Close();
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requestStream.Close();
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var response = request.GetResponse();
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string responsetext = string.Empty;
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using (Stream stream = response.GetResponseStream())
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using (StreamReader reader = new StreamReader(stream))
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{
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responsetext = reader.ReadToEnd();
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}
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return responsetext;
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}
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catch (Exception ex)
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{
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throw ex;
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}
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}
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/// <summary>
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/// 文件上传
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/// </summary>
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public static string Upload(string url, Stream stream, string suffix)
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{
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if (string.IsNullOrEmpty(url))
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return default;
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if (stream == null)
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return default;
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try
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{
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string boundary = "----" + DateTime.Now.Ticks.ToString("x");// 边界符
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byte[] beginBoundaryBytes = Encoding.UTF8.GetBytes("--" + boundary + "\r\n"); // 边界符开始。【☆】右侧必须要有 \r\n 。
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byte[] endBoundaryBytes = Encoding.UTF8.GetBytes("\r\n--" + boundary + "--\r\n"); // 边界符结束。【☆】两侧必须要有 --\r\n 。
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var fileFormTemplate = "Content-Disposition: form-data; name=\"{0}\"; filename=\"{1}\"\r\n" + "Content-Type: application/octet-stream\r\n\r\n";//文件模板
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HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
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request.ContentType = string.Format("multipart/form-data; boundary={0}", boundary);
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request.Method = WebRequestMethods.Http.Post;
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request.AllowWriteStreamBuffering = false;
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//request.KeepAlive = true;
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request.Timeout = -1;
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long contentLength = 0;
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var fileFormItem = string.Format(fileFormTemplate, "file", suffix);
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byte[] fileFormItemBytes = Encoding.UTF8.GetBytes(fileFormItem);
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contentLength += beginBoundaryBytes.Length;
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contentLength += fileFormItemBytes.Length;
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//var fileStream = new FileStream(steam, FileMode.Open, FileAccess.Read);
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contentLength += stream.Length;
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contentLength += endBoundaryBytes.Length;
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request.ContentLength = contentLength;
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var requestStream = request.GetRequestStream();
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requestStream.Write(beginBoundaryBytes, 0, beginBoundaryBytes.Length);
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requestStream.Write(fileFormItemBytes, 0, fileFormItemBytes.Length);
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//每次上传4M
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byte[] buffer = new Byte[checked((uint)Math.Min(4096, (int)stream.Length))];
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int bytesRead = 0;
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while ((bytesRead = stream.Read(buffer, 0, buffer.Length)) != 0)
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{
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requestStream.Write(buffer, 0, bytesRead);
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}
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requestStream.Write(endBoundaryBytes, 0, endBoundaryBytes.Length);
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stream.Close();
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requestStream.Close();
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var response = request.GetResponse();
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string responsetext = string.Empty;
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using (Stream rs = response.GetResponseStream())
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using (StreamReader reader = new StreamReader(rs))
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{
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responsetext = reader.ReadToEnd();
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}
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return responsetext;
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}
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catch (System.Exception ex)
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{
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throw ex;
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}
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}
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/// <summary>
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/// 下载文件
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/// </summary>
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public static Stream Download(string url)
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{
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var request = (HttpWebRequest)WebRequest.Create(url);
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request.Method = "GET";
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request.ContentType = "application/json";
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//request.Timeout = 10 * 1000;//请求超时时间
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using (var response = (HttpWebResponse)request.GetResponse())
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{
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if (response.StatusCode == HttpStatusCode.NoContent)
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return null;
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var ms = new MemoryStream();
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response.GetResponseStream().CopyTo(ms);
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return ms;
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}
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}
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/// <summary>
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/// 下载文件
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/// </summary>
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public static void DownloadUri(string uri, string filePath)
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{
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var client = new System.Net.WebClient();
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client.DownloadFile(uri, filePath);
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}
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}
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}
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