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C# 使用HttpWebRequest通过PHP接口 上传文件
1：上传文件实例
public void UploadXMLLog(string xmlpath)
{
NameValueCollection nvc = new NameValueCollection();
CookieContainer cookies = new CookieContainer();
nvc.Add("", “”);
......
string url = "UrlPath";
string res = UploadFile(xmlpath, url, nvc, cookies);
}
2：UploadFile源码
1 public string UploadFile(string uploadfile, string url, NameValueCollection querystring, CookieContainer cookies, string fileFormName = "file", string contenttype = "multipart/form-data") 2 { 3 if ((fileFormName == null) || 4 (fileFormName.Length == 0)) 5 { 6 fileFormName = "file"; 7 } 8 9 if ((contenttype == null) || 10 (contenttype.Length == 0)) 11 { 12 contenttype = "application/octet-stream"; 13 } 14 Uri uri = new Uri(url); 15 string boundary = "----------" + DateTime.Now.Ticks.ToString("x"); 16 HttpWebRequest webrequest = (HttpWebRequest)WebRequest.Create(uri); 17 webrequest.CookieContainer = cookies; 18 webrequest.ContentType = "multipart/form-data; boundary=" + boundary; 19 webrequest.Method = "POST"; 20 StringBuilder sb = new StringBuilder(); 21 sb.Append("--"); 22 sb.Append(boundary); 23 sb.Append("\r\n"); 24 sb.Append("Content-Disposition: form-data; name=\""); 25 sb.Append(fileFormName); 26 sb.Append("\"; filename=\""); 27 sb.Append(uploadfile); 28 sb.Append("\""); 29 sb.Append("\r\n"); 30 sb.Append("Content-Type: "); 31 sb.Append(contenttype); 32 sb.Append("\r\n"); 33 sb.Append("\r\n"); 34 35 string postHeader = sb.ToString(); 36 byte[] postHeaderBytes = Encoding.UTF8.GetBytes(postHeader); 37 byte[] boundaryBytes = Encoding.ASCII.GetBytes("--" + boundary + "\r\n"); 38 byte[] br = Encoding.ASCII.GetBytes("\r\n"); 39 FileStream fileStream = new FileStream(uploadfile, FileMode.Open, FileAccess.Read); 40 long length = postHeaderBytes.Length + fileStream.Length + br.Length; 41 if (querystring != null) 42 { 43 44 StringBuilder sub = new StringBuilder(); 45 foreach (string key in querystring.Keys) 46 { 47 sub.Append("--"); 48 sub.Append(boundary); 49 sub.Append("\r\n"); 50 sub.Append("Content-Disposition: form-data; name=\""); 51 sub.Append(key); 52 sub.Append("\""); 53 sub.Append("\r\n"); 54 sub.Append("\r\n"); 55 sub.Append(querystring[key]); 56 sub.Append("\r\n"); 57 byte[] formitembytes = Encoding.UTF8.GetBytes(sub.ToString()); 58 length += formitembytes.Length; 59 } 60 } 61 length += boundaryBytes.Length; 62 webrequest.ContentLength = length; 63 Stream requestStream = webrequest.GetRequestStream(); 64 // Write out our post header 65 requestStream.Write(postHeaderBytes, 0, postHeaderBytes.Length); 66 67 // Write out the file contents 68 byte[] buffer = new Byte[checked((uint)Math.Min(4096, (int)fileStream.Length))]; 69 int bytesRead = 0; 70 while ((bytesRead = fileStream.Read(buffer, 0, buffer.Length)) != 0) 71 requestStream.Write(buffer, 0, bytesRead); 72 requestStream.Write(br, 0, br.Length); 73 if (querystring != null) 74 { 75 StringBuilder sub = new StringBuilder(); 76 foreach (string key in querystring.Keys) 77 { 78 sub.Append("--"); 79 sub.Append(boundary); 80 sub.Append("\r\n"); 81 sub.Append("Content-Disposition: form-data; name=\""); 82 sub.Append(key); 83 sub.Append("\""); 84 sub.Append("\r\n"); 85 sub.Append("\r\n"); 86 sub.Append(querystring[key]); 87 sub.Append("\r\n"); 88 byte[] formitembytes = Encoding.UTF8.GetBytes(sub.ToString()); 89 requestStream.Write(formitembytes, 0, formitembytes.Length); 90 } 91 } 92 // Write out the trailing boundary 93 requestStream.Write(boundaryBytes, 0, boundaryBytes.Length); 94 webrequest.Timeout = 1000000; 95 96 WebResponse responce = webrequest.GetResponse(); 97 98 Stream s = responce.GetResponseStream(); 99 100 StreamReader sr = new StreamReader(s);101 102 string str = sr.ReadToEnd();103 104 105 fileStream.Close();106 107 requestStream.Close();108 109 sr.Close();110 111 s.Close();112 113 responce.Close();114 115 return str;116 117 }
感谢：外国友人http://blogs.msdn.com/b/johan/archive/2006/11/15/are-you-getting-outofmemoryexceptions-when-uploading-large-files.aspx
C# 使用HttpWebRequest通过PHP接口 上传文件
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