20220315 代码初始化上传
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using System;
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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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namespace BLL
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{
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public static class APIUpLoadFileService
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{
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public static string Pic(string url, string filePath)
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{
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// 时间戳，用做boundary
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string timeStamp = DateTime.Now.Ticks.ToString("x");
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//根据uri创建HttpWebRequest对象
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HttpWebRequest httpReq = (HttpWebRequest)WebRequest.Create(new Uri(url));
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httpReq.Method = "POST";
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httpReq.AllowWriteStreamBuffering = false; //对发送的数据不使用缓存
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httpReq.Timeout = 300000; //设置获得响应的超时时间（300秒）
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httpReq.ContentType = "multipart/form-data; boundary=" + timeStamp;
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//文件
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FileStream fileStream = new FileStream(filePath, FileMode.Open, FileAccess.Read);
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BinaryReader binaryReader = new BinaryReader(fileStream);
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//头信息
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string boundary = "--" + timeStamp;
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string dataFormat = boundary + "\r\nContent-Disposition: form-data; name=imgs;filename=\"{1}\"\r\nContent-Type:application/octet-stream\r\n\r\n";
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string header = string.Format(dataFormat, "file", Path.GetFileName(filePath));
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byte[] postHeaderBytes = Encoding.UTF8.GetBytes(header);
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//结束边界
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byte[] boundaryBytes = Encoding.ASCII.GetBytes("\r\n--" + timeStamp + "--\r\n");
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long length = fileStream.Length + postHeaderBytes.Length + boundaryBytes.Length;
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httpReq.ContentLength = length;//请求内容长度
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string returnValue = "";
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try
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{
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//每次上传4k
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int bufferLength = 4096;
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byte[] buffer = new byte[bufferLength];
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//已上传的字节数
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long offset = 0;
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int size = binaryReader.Read(buffer, 0, bufferLength);
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Stream postStream = httpReq.GetRequestStream();
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//发送请求头部消息
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postStream.Write(postHeaderBytes, 0, postHeaderBytes.Length);
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while (size > 0)
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{
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postStream.Write(buffer, 0, size);
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offset += size;
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size = binaryReader.Read(buffer, 0, bufferLength);
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}
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//添加尾部边界
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postStream.Write(boundaryBytes, 0, boundaryBytes.Length);
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postStream.Close();
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//获取服务器端的响应
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using (HttpWebResponse response = (HttpWebResponse)httpReq.GetResponse())
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{
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Stream receiveStream = response.GetResponseStream();
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StreamReader readStream = new StreamReader(receiveStream, Encoding.UTF8);
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returnValue = readStream.ReadToEnd();
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response.Close();
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readStream.Close();
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}
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}
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catch (Exception ex)
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{
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returnValue = "";
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}
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finally
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{
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fileStream.Close();
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binaryReader.Close();
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}
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return returnValue;
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}
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public static String saveImg(String url)
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{
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WebClient mywebclient = new WebClient();
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string newfilename = Guid.NewGuid() + DateTime.Now.Year.ToString() + DateTime.Now.Month.ToString() + DateTime.Now.Day.ToString() + DateTime.Now.Hour.ToString() + DateTime.Now.Minute.ToString() + DateTime.Now.Second.ToString() + ".jpg";
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string subPath = @"d:\imgs\";
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if (false == System.IO.Directory.Exists(subPath))
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{
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//创建pic文件夹
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Directory.CreateDirectory(subPath);
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}
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string filepath = @"d:\imgs\" + newfilename;
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try
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{
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mywebclient.DownloadFile(url, filepath);
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}
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catch (Exception ex)
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{
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filepath = "";
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}
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return filepath;
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}
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/// <summary>
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/// 保存附件方法
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/// </summary>
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public static void SaveAttachUrl(Model.ToDoItem toDoItem)
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{
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using (Model.SGGLDB db = new Model.SGGLDB(Funs.ConnString))
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{
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////保存附件
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if (!string.IsNullOrEmpty(toDoItem.UrlStr))
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{
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if (toDoItem.IsInsert == "1")
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{
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var att = db.AttachFile.FirstOrDefault(x => x.ToKeyId == toDoItem.DataId);
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if (att != null)
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{
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toDoItem.UrlStr = att.AttachUrl + "," + toDoItem.UrlStr;
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}
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}
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UploadFileService.SaveAttachUrl(UploadFileService.GetSourceByAttachUrl(toDoItem.UrlStr, 10, null), toDoItem.UrlStr, toDoItem.MenuId, toDoItem.DataId);
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}
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else
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{
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CommonService.DeleteAttachFileById(toDoItem.DataId);
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}
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}
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}
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public static void SaveAttachUrl(string menuId, string dataId, string url, string isInsert)
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{
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////保存附件
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if (!string.IsNullOrEmpty(url))
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{
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if (isInsert == "1")
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{
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var att = Funs.DB.AttachFile.FirstOrDefault(x => x.ToKeyId == dataId);
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if (att != null)
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{
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url = att.AttachUrl + "," + url;
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}
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}
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UploadFileService.SaveAttachUrl(UploadFileService.GetSourceByAttachUrl(url, 10, null), url, menuId, dataId);
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}
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else
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{
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CommonService.DeleteAttachFileById(dataId);
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}
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}
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/// <summary>
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/// 获取附件路径
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/// </summary>
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/// <returns></returns>
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public static string getFileUrl(string tokeyId, string url)
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{
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string fileUrl = url;
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using (Model.SGGLDB db = new Model.SGGLDB(Funs.ConnString))
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{
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if (!string.IsNullOrEmpty(tokeyId))
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{
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var getAtt = db.AttachFile.FirstOrDefault(x => x.ToKeyId == tokeyId);
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if (getAtt != null && !string.IsNullOrEmpty(getAtt.AttachUrl))
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{
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fileUrl = getAtt.AttachUrl;
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}
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}
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if (!string.IsNullOrEmpty(fileUrl))
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{
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fileUrl = fileUrl.Replace('\\', '/');
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}
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}
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return fileUrl;
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}
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/// <summary>
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/// 获取附件路径
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/// </summary>
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/// <returns></returns>
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public static string getFileUrl(string menuId, string tokeyId, string url)
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{
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string fileUrl = url;
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using (Model.SGGLDB db = new Model.SGGLDB(Funs.ConnString))
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{
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if (!string.IsNullOrEmpty(tokeyId))
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{
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var getAtt = db.AttachFile.FirstOrDefault(x =>x.MenuId== menuId && x.ToKeyId == tokeyId);
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if (getAtt != null && !string.IsNullOrEmpty(getAtt.AttachUrl))
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{
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fileUrl = getAtt.AttachUrl;
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}
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}
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if (!string.IsNullOrEmpty(fileUrl))
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{
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fileUrl = fileUrl.Replace('\\', '/');
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}
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}
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return fileUrl;
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}
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}
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}
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