private void EndPostResponse(IAsyncResult result)
{
//结束异步请求，获取结果
HttpWebRequest webRequest = null;
WebResponse webResponse = null;
string url = null;
try
{
webRequest = (HttpWebRequest)result.AsyncState;
webResponse = webRequest.EndGetResponse(result);
//把输出结果转化
Stream answer = webResponse.GetResponseStream();
// var encode=Encoding.GetEncoding("utf-8");
var encode = Encoding.UTF8;
StreamReader answerData = new StreamReader(answer, encode);
//触发完毕事件
url = webRequest.RequestUri.AbsoluteUri;
string responseData = answerData.ReadToEnd();
if (null != this.OnPostUrlRequestCompleted)
{
var agrs = new HTTPRequestCompletedAgrs {
URL = url, Content = responseData
};
this.OnPostUrlRequestCompleted.Invoke(this, agrs);
}
//及时释放资源
answer.Dispose();
answerData.Dispose();
}
catch (Exception ex)
{
if (null != this.OnPostUrlRequestCompleted)
{
var agrs = new HTTPRequestCompletedAgrs {
URL = url, Content = null, Error = ex
};
this.OnPostUrlRequestCompleted.Invoke(this, agrs);
}
}
finally
{
if (null != webResponse)
{
webResponse.Close();
}
}
}
/// <summary>
/// 发送异步的HTTP -GET请求
/// </summary>
/// <param name="url"></param>
/// <param name="timeout"></param>
/// <param name="cookies"></param>
public void CreateGetAsync(string url, NameValueCollection requestHeaders, int?timeout, CookieCollection cookies = null)
{
ServicePointManager.ServerCertificateValidationCallback = new System.Net.Security.RemoteCertificateValidationCallback(CheckValidationResult);
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
request.Method = "GET";
//webReq.ContentType = "text/html;charset=utf-8";
request.Accept = "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8";
request.UserAgent = DefaultUserAgent;
request.AllowAutoRedirect = true;
request.KeepAlive = true;
request.CookieContainer = GlobleCookieContainer;
request.Timeout = 3000;
if (timeout.HasValue)
{
request.Timeout = timeout.Value;
}
this.FormarRequestHeaders(request, requestHeaders);
try
{
//开启异步请求
IAsyncResult result = request.BeginGetResponse(new AsyncCallback(EndGetResponse), request);
}
catch (Exception ex)
{
//未能连接请求 那么通知事件 已经触发，返回结果为空
if (null != this.OnGetUrlRequestCompleted)
{
var agrs = new HTTPRequestCompletedAgrs {
URL = url, Content = null, Error = ex
};
this.OnGetUrlRequestCompleted.Invoke(this, agrs);
}
}
}
/// <summary>
/// 创建POST方式的HTTP请求 ，基于异步的请求
/// </summary>
/// <param name="url">请求的URL</param>
/// <param name="contentType">请求的内容类型</param>
/// <param name="parameters">随同请求POST的参数名称及参数值字典</param>
/// <param name="timeout">请求的超时时间</param>
/// <param name="userAgent">请求的客户端浏览器信息，可以为空</param>
/// <param name="requestEncoding">发送HTTP请求时所用的编码</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 void CreatePostHttpResponseAsync(string url, NameValueCollection requestHeaders, string contentType, IDictionary <string, string> parameters, int?timeout = null, CookieContainer cookies = null)
{
if (string.IsNullOrEmpty(url))
{
throw new ArgumentNullException("url");
}
//获取域名
string domainName = GetDomainName(url);
//设置默认的编码 UFT-8
Encoding requestEncoding = Encoding.UTF8;
HttpWebRequest request = null;
//如果是发送HTTPS请求
if (url.StartsWith("https", StringComparison.OrdinalIgnoreCase))
{
ServicePointManager.ServerCertificateValidationCallback = new RemoteCertificateValidationCallback(CheckValidationResult);
request = WebRequest.Create(url) as HttpWebRequest;
request.ProtocolVersion = HttpVersion.Version10;
}
else
{
request = WebRequest.Create(url) as HttpWebRequest;
}
request.Method = "POST";
request.ContentType = contentType;
request.CookieContainer = GlobleCookieContainer;
request.UserAgent = DefaultUserAgent;
if (timeout.HasValue)
{
request.Timeout = timeout.Value;
}
if (cookies != null)
{
request.CookieContainer = cookies;
}
this.FormarRequestHeaders(request, requestHeaders);
//如果需要POST数据
if (!(parameters == null || parameters.Count == 0))
{
if (contentType == FormDataType.Json)
{
// StringBuilder buffer = new StringBuilder();
// buffer.AppendFormat("{0}", parameters.First().Value);//json 必须是一个整体的包结构
//传递Json 数据包 必须是 UTF-8编码。。。javascript 设计如此
requestEncoding = Encoding.UTF8;
///json 必须是一个整体的包结构,而且不要 转码
string paraBag = parameters.First().Value;
byte[] data = requestEncoding.GetBytes(paraBag);//requestEncoding.GetBytes(buffer.ToString());
using (Stream stream = request.GetRequestStream())
{
stream.Write(data, 0, data.Length);
stream.Flush();
}
}
else if (contentType == FormDataType.StandForm)
{
StringBuilder buffer = new StringBuilder();
int i = 0;
foreach (string key in parameters.Keys)
{
if (i > 0)
{
buffer.AppendFormat("&{0}={1}", key, HttpUtility.UrlEncode(parameters[key]));
}
else
{
buffer.AppendFormat("{0}={1}", key, HttpUtility.UrlEncode(parameters[key]));
}
i++;
}
byte[] data = requestEncoding.GetBytes(buffer.ToString());
using (Stream stream = request.GetRequestStream())
{
stream.Write(data, 0, data.Length);
}
}
}
try
{
//开启异步请求
IAsyncResult result = request.BeginGetResponse(new AsyncCallback(EndPostResponse), request);
}
catch (Exception ex)
{
//未能连接请求 那么通知事件 已经触发，返回结果为空
if (null != this.OnPostUrlRequestCompleted)
{
var agrs = new HTTPRequestCompletedAgrs {
URL = url, Content = null, Error = ex
};
this.OnPostUrlRequestCompleted.Invoke(this, agrs);
}
}
}
/// <summary>
/// 创建GET方式的HTTP请求
/// </summary>
/// <param name="url">请求的URL</param>
/// <param name="timeout">请求的超时时间</param>
/// <param name="userAgent">请求的客户端浏览器信息，可以为空</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 HttpWebResponse CreateGetHttpResponse(string url, NameValueCollection requestHeaders, int?timeout = 5000, CookieContainer cookies = null)
{
if (string.IsNullOrEmpty(url))
{
throw new ArgumentNullException("url");
}
//获取域名
string domainName = GetDomainName(url);
HttpWebRequest request = null;// WebRequest.Create(url) as HttpWebRequest;
//如果是发送HTTPS请求
if (url.StartsWith("https", StringComparison.OrdinalIgnoreCase))
{
ServicePointManager.ServerCertificateValidationCallback = new RemoteCertificateValidationCallback(CheckValidationResult);
request = WebRequest.Create(url) as HttpWebRequest;
request.ProtocolVersion = HttpVersion.Version10;
}
else
{
request = WebRequest.Create(url) as HttpWebRequest;
}
//---------固定的头--begin-----------
request.Method = "GET";
request.UserAgent = DefaultUserAgent;
request.CookieContainer = cookies;//设定为共享Cookie容器
request.Headers.Add("Accept-Language", "zh-CN,zh;q=0.8");
//---------固定的头----end------------
request.Accept = "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8";
request.KeepAlive = true;
request.Timeout = timeout.Value;
// request.Host = "s.click.taobao.com";
// request.Headers.Add("Upgrade-Insecure-Requests", "1");
this.FormarRequestHeaders(request, requestHeaders);
if (cookies != null)
{
request.CookieContainer = cookies;
}
try
{
var response = request.GetResponse() as HttpWebResponse;
return(response);
}
catch (Exception ex)
{
if (null != this.OnGetUrlRequestCompleted)
{
var args = new HTTPRequestCompletedAgrs()
{
URL = url,
Content = null,
Error = ex
};
this.OnGetUrlRequestCompleted.Invoke(this, args);
}
return(null);
}
}