/// <summary>
/// Starts an asynchronous operation to get web site info.
/// </summary>
/// <param name="domainName"></param>
/// <param name="callback"></param>
/// <param name="userState"></param>
/// <returns></returns>
public static IAsyncResult BeginGetWebSiteInfo(string url, IWebProxy proxy, AsyncCallback callback, object userState)
{
HttpWebRequest request = CreateGetWebSiteInfoRequest(url, proxy);
AsyncResult <IWebSiteInfo> result = new AsyncResult <IWebSiteInfo>(callback, userState);
NetworkRequestAsyncTimeout.RegisterRequest(request.BeginGetResponse((ar) => {
IWebSiteInfo info = null;
Exception error = null;
byte[] buffer = g_bufferManager.TakeBuffer(BUFFER_SIZE);
try {
string content = null;
using (HttpWebResponse response = (HttpWebResponse)((HttpWebRequest)ar.AsyncState).EndGetResponse(ar)) {
content = response.GetResponseString(buffer);
info = ParseWebSiteInfo(url, response, content);
}
} catch (Exception ex) {
error = ex;
} finally {
g_bufferManager.ReturnBuffer(buffer);
}
result.MarkCompleted(error, false, info);
}, request), request, TIMEOUT);
return(result);
}
public void GetWebSiteInfoTest()
{
IWebSiteInfo info = WebHelper.GetWebSiteInfo("http://www.huazhang.com", null);
IWebSiteInfo info1 = WebHelper.GetWebSiteInfo("http://www.beianm.com", null);
IWebSiteInfo info2 = WebHelper.GetWebSiteInfo("http://www.qq.com", null);
IWebSiteInfo info3 = WebHelper.GetWebSiteInfo("http://www.163.com", null);
IWebSiteInfo info4 = WebHelper.GetWebSiteInfo("http://www.sohu.com", null);
Assert.IsNotNull(info1);
Assert.IsNotNull(info2);
Assert.IsNotNull(info3);
Assert.IsNotNull(info4);
}
public void BeginGetWebSiteInfoTest()
{
IWebSiteInfo info1 = null, info2 = null, info3 = null, info4 = null;
using (CountdownEvent ce = new CountdownEvent(4)) {
WebHelper.BeginGetWebSiteInfo("http://www.beianm.com", null, (ar) => {
try {
info1 = WebHelper.EndGetWebSiteInfo(ar);
} finally {
ce.Signal();
}
}, null);
WebHelper.BeginGetWebSiteInfo("http://www.qq.com", null, (ar) => {
try {
info2 = WebHelper.EndGetWebSiteInfo(ar);
} finally {
ce.Signal();
}
}, null);
WebHelper.BeginGetWebSiteInfo("http://www.163.com", null, (ar) => {
try {
info3 = WebHelper.EndGetWebSiteInfo(ar);
} finally {
ce.Signal();
}
}, null);
WebHelper.BeginGetWebSiteInfo("http://www.sohu.com", null, (ar) => {
try {
info4 = WebHelper.EndGetWebSiteInfo(ar);
} finally {
ce.Signal();
}
}, null);
ce.Wait();
}
Assert.IsNotNull(info1);
Assert.IsNotNull(info2);
Assert.IsNotNull(info3);
Assert.IsNotNull(info4);
}
