HTTP的post和get總結

貼一下自己的源碼

post：

string postData = "username=" + username + "&password=" + password;

//HttpWebRequest request = (HttpWebRequest)WebRequest.Create(Url);

request.Method = "POST";

request.ContentType = "application/x-www-form-urlencoded";

request.Timeout = 300000;

Encoding encoding = Encoding.GetEncoding("gb2312");//進行中文亂碼

byte[] bytes = encoding.GetBytes(postData);

request.ContentLength = bytes.Length;

Stream requestStream = request.GetRequestStream();

requestStream.Write(bytes, 0, bytes.Length);

requestStream.Flush();

requestStream.Close();

HttpWebResponse response = (HttpWebResponse)request.GetResponse();

Stream myResponseStream = response.GetResponseStream();

StreamReader myStreamReader = new StreamReader(myResponseStream, Encoding.GetEncoding("gb2312"));

string responseString = myStreamReader.ReadToEnd();

myStreamReader.Close();

myResponseStream.Close();

MessageBox.Show(responseString);

get：

HttpWebRequest req = (HttpWebRequest) HttpWebRequest.Create( "http://www.google.com/webhp?hl=zh-CN" );

req.Method = "GET";

using (WebResponse wr = req.GetResponse())

{

//在這裡對接收到的頁面内容進行處理

}

post上傳檔案

private void addpic_Click(object sender, EventArgs e)

this.openPic.Filter = "圖檔檔案(*.jpg,*.gif,*.bmp)|*.jpg|*.gif|*.bmp";

if(DialogResult.OK==this.openPic.ShowDialog()&&(this.openPic.FileName!=null))

Bitmap bit = new Bitmap(this.openPic.FileName);

this.pictureBox1.Image = Image.FromHbitmap(bit.GetHbitmap());

int last = this.openPic.FileName.LastIndexOf(".");

string dat = this.openPic.FileName.Substring(last);

DateTime date = DateTime.Now;

picname=date.ToString("yyyyMMddHHmmss", DateTimeFormatInfo.InvariantInfo);

picname = picname + dat;

//MessageBox.Show(picpath + @"/" + picname + ".png");

//File.Move(this.openPic.FileName,picpath+@"/"+picname);

File.Copy(this.openPic.FileName, picpath + @"/" + picname);

public void UploadFileBinary1(string localFile, string uploadUrl)

try

DateTime time1;

time1 = DateTime.Now;

long num3 = time1.Ticks;

//text1 = "---------------------" + num3.ToString("x");

string boundary = "---------------------------" + num3.ToString("x");

// Build up the post message header 

StringBuilder sb = new StringBuilder();

sb.Append("--");

sb.Append(boundary);

sb.Append("/r/n");

sb.Append("Content-Disposition: form-data; name=/"file/"; filename=/"");

sb.Append(localFile);

sb.Append("/"");

sb.Append("Content-Type: application/octet-stream");

// sb.Append("Content-Type: application/x-xml");

//sb.Append("Content-Type: text/xml"); 

string postHeader = sb.ToString();

byte[] postHeaderBytes = Encoding.UTF8.GetBytes(postHeader);

byte[] boundaryBytes = Encoding.ASCII.GetBytes("/r/n--" + boundary + "/r/n");

// Open the local file

FileStream rdr = new FileStream(localFile, FileMode.Open);

HttpWebRequest req = (HttpWebRequest)WebRequest.Create(uploadUrl);

req.Method = "post";

req.AllowWriteStreamBuffering = true;

req.ContentType = "multipart/form-data boundary=" + boundary;

//req.ContentLength == boundaryBytes.Length + postHeaderBytes.Length + rdr.Length;

req.ContentLength = boundaryBytes.Length + postHeaderBytes.Length + rdr.Length;

// Retrieve request stream 

Stream reqStream = req.GetRequestStream();

// BinaryReader r = new BinaryReader(rdr);

// byte[] postArray = r.ReadBytes((int)fs.Length);

// Stream postStream = myWebClient.OpenWrite(uriString, "PUT");

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

// Allocate byte buffer to hold file contents

long length = rdr.Length;

byte[] inData = new byte[409600];

// loop through the local file reading each data block

// and writing to the request stream buffer

int bytesRead = rdr.Read(inData, 0, inData.Length);

while (bytesRead > 0)

reqStream.Write(inData, 0, bytesRead);

bytesRead = rdr.Read(inData, 0, inData.Length);

rdr.Close();

reqStream.Write(boundaryBytes, 0, boundaryBytes.Length);

reqStream.Close();

HttpWebResponse response = (HttpWebResponse)req.GetResponse();

string retString = myStreamReader.ReadToEnd();

// response.Close();

catch (Exception ex)

string exContent;

exContent = ex.ToString();

MessageBox.Show(exContent);

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

request.Method = "POST";//這無論是賦post還是get，都必須用全大寫，此值錯一點，都會導緻程式錯誤，因為不符合http協定 

request.ContentType = "multipart/form-data; boundary=--abc";//或者為"application/x-www-form-urlencoded"，對應form标簽裡的 enctype屬性，boundary那部分查是FORM元素各值的分隔符，具體請查閱HTTP協定相關文檔，如果此值用application/x- www-form-urlencoded則form各元素用&來分隔，而元素的值是經過了url編碼，調用System.Web.HttpUtility.UrlEncode方法，就能将值進行url編碼。

//如果需要加cookie，則按如下方式添加，具體請參閱msdn 

request.CookieContainer = new CookieContainer(); 

request.CookieContainer.Add(new Cookie("test", "i love u", "/", "localhost")); 

byte[] data = Encoding.GetEncoding(encoding).GetBytes(postData);//将要發送的資料按HTTP協定拼裝好字元串轉成位元組數組 

request.ContentLength = data.Length;//設定内容的長度，長度就是要發送的整個位元組數組的長度，此句必須有，長度不對就會導緻錯誤 

request.GetRequestStream().Write(data, 0, data.Length);//擷取request的流，将資料寫入流中，至此完成了form送出的必須有的步驟 

response = (HttpWebResponse)request.GetResponse();//最後取得response擷取伺服器端的傳回資料進行處理

     本文轉自xyz_lmn51CTO部落格，原文連結：http://blog.51cto.com/xyzlmn/819087，如需轉載請自行聯系原作者