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由于经常需要模拟web Get,Post等方法，今天将这些方法顺便整理分享。
一个不错的在线测试网站: 点击打开链接 可以模拟各种Get,Post，还可以设置body,header的参数，比较方便，强力推荐
Get:
<span style="white-space:pre"> </span>public static string HttpGet(string url, NameValueCollection content, NameValueCollection headers, Encoding encode)
{
string errorMsg;
var webClient = new WebClient { Encoding = encode ?? Encoding.UTF8 };
webClient.Headers.Add(headers);
try
{
webClient.QueryString.Add(content);
return webClient.DownloadString(url);
}
catch (Exception ex)
{
errorMsg = ex.ToString();
}
return errorMsg;
} //如果没有content和header 参数 则 new 空对象而不能为null
/// <summary>
/// 创建POST方式的HTTP请求
/// </summary>
/// <param name="url">请求的URL</param>
/// <param name="parameters">随同请求POST的参数名称及参数值字典</param>
/// <param name="cookies">随同HTTP请求发送的Cookie信息，如果不需要身份验证可以为空</param>
/// <returns></returns>
public static string HttpPost(string url, string parameters, CookieCollection cookies,Encoding encoding =null)
{
if (encoding == null)
{
encoding = Encoding.UTF8;
}
if (string.IsNullOrEmpty(url))
{
throw new ArgumentNullException("url");
}
HttpWebRequest request = null;
Stream stream = null;//用于传参数的流
try
{
request = WebRequest.Create(url) as HttpWebRequest;
request.Method = "POST";
request.ContentType = "application/x-www-form-urlencoded";
request.UserAgent = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.2; SV1; .NET CLR 1.1.4322; .NET CLR 2.0.50727)"; //默认IE
request.Timeout = 4000;//4秒超时
if (cookies != null)
{
request.CookieContainer = new CookieContainer();
request.CookieContainer.Add(cookies);
}
byte[] data = encoding.GetBytes(parameters);
request.ContentLength = data.Length;
stream = request.GetRequestStream();
stream.Write(data, 0, data.Length);
stream.Close();
}
catch (Exception ex)
{
throw ex;
}
finally
{
if (stream != null)
{
stream.Close();
}
}
var response = request.GetResponse() as HttpWebResponse;
string xml = new StreamReader(response.GetResponseStream(), encoding).ReadToEnd();
return xml;
} 参考:http://blog.csdn.net/haitaofeiyang/article/details/18362225 有完整的例子Post (带文件)
/// <summary>
/// post 数据 body 参数,支持文件
/// </summary>
/// <param name="url"></param>
/// <param name="timeOut"></param>
/// <param name="fileKeyName">文件名</param>
/// <param name="filePath">文件地址</param>
/// <param name="stringDict">body 参数列表</param>
/// <returns></returns>
public static string HttpPostData(string url, int timeOut, string fileKeyName,string filePath, NameValueCollection stringDict)
{
string responseContent;
var memStream = new MemoryStream();
var webRequest = (HttpWebRequest)WebRequest.Create(url);
// 边界符
var boundary = "---------------" + DateTime.Now.Ticks.ToString("x");
// 边界符
var beginBoundary = Encoding.ASCII.GetBytes("--" + boundary + "\r\n");
var fileStream = new FileStream(filePath, FileMode.Open, FileAccess.Read);
// 最后的结束符
var endBoundary = Encoding.ASCII.GetBytes("--" + boundary + "--\r\n");
// 设置属性
webRequest.Method = "POST";
webRequest.Timeout = timeOut;
webRequest.ContentType = "multipart/form-data; boundary=" + boundary;
// 写入文件
const string filePartHeader =
"Content-Disposition: form-data; name=\"{0}\"; filename=\"{1}\"\r\n" +
"Content-Type: application/octet-stream\r\n\r\n";
var header = string.Format(filePartHeader, fileKeyName, filePath);
var headerbytes = Encoding.UTF8.GetBytes(header);
memStream.Write(beginBoundary, 0, beginBoundary.Length);
memStream.Write(headerbytes, 0, headerbytes.Length);
var buffer = new byte[1024];
int bytesRead; // =0
while ((bytesRead = fileStream.Read(buffer, 0, buffer.Length)) != 0)
{
memStream.Write(buffer, 0, bytesRead);
}
// 写入字符串的Key
var stringKeyHeader = "\r\n--" + boundary +
"\r\nContent-Disposition: form-data; name=\"{0}\"" +
"\r\n\r\n{1}\r\n";
foreach (byte[] formitembytes in from string key in stringDict.Keys
select string.Format(stringKeyHeader, key, stringDict[key])
into formitem
select Encoding.UTF8.GetBytes(formitem))
{
memStream.Write(formitembytes, 0, formitembytes.Length);
}
// 写入最后的结束边界符
memStream.Write(endBoundary, 0, endBoundary.Length);
webRequest.ContentLength = memStream.Length;
var requestStream = webRequest.GetRequestStream();
memStream.Position = 0;
var tempBuffer = new byte[memStream.Length];
memStream.Read(tempBuffer, 0, tempBuffer.Length);
memStream.Close();
requestStream.Write(tempBuffer, 0, tempBuffer.Length);
requestStream.Close();
var httpWebResponse = (HttpWebResponse)webRequest.GetResponse();
using (var httpStreamReader = new StreamReader(httpWebResponse.GetResponseStream(),
Encoding.GetEncoding("utf-8")))
{
responseContent = httpStreamReader.ReadToEnd();
}
fileStream.Close();
httpWebResponse.Close();
webRequest.Abort();
return responseContent;
} 参考:http://www.suchso.com/projecteactual/csharp-HttpWebRequest-post-dll.html