/// <summary>
/// 有关HTTP请求的辅助类
/// </summary>
public class HttpQuery
{
private static readonly string DefaultUserAgent =
"Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.2; SV1; .NET CLR 1.1.4322; .NET CLR 2.0.50727)"; public static void Get(string url, object data, Action<string> callback)
{
IDictionary<string, string> parameters = Getparameters(data); if (!(parameters == null || parameters.Count == ))
{
url += "?";
foreach (var item in parameters)
{
url += item.Key + "=" + item.Value + "&";
}
}
CreateGetHttpResponse(url, null, null, null, callback);
} public static void Post(string url, object data, Action<string> callback)
{
IDictionary<string, string> parameters = Getparameters(data); CreatePostHttpResponse(url, parameters, null, null, Encoding.UTF8, null, callback);
} public static void Post(string url, string data, Action<string> callback)
{
CreatePostHttpResponse(url, data, null, null, Encoding.UTF8, null, callback);
} private static IDictionary<string, string> Getparameters(object data)
{
if (data == null)
{
return new Dictionary<string, string>();
}
IDictionary<string, string> parameters = new Dictionary<string, string>(); Type type = data.GetType();
PropertyInfo[] props = type.GetProperties(BindingFlags.Public | BindingFlags.Instance);
foreach (PropertyInfo p in props)
{
parameters.Add(p.Name, p.GetValue(data).ToString());
} return parameters;
} /// <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>
private static HttpWebResponse CreateGetHttpResponse(string url, int? timeout, string userAgent,
CookieCollection cookies, Action<string> callback, string encoding = "utf-8")
{
if (string.IsNullOrEmpty(url))
{
return null;
//throw new ArgumentNullException("url");
}
try
{
HttpWebRequest request = WebRequest.Create(url) as HttpWebRequest;
request.Method = "GET";
request.UserAgent = DefaultUserAgent;
if (!string.IsNullOrEmpty(userAgent))
{
request.UserAgent = userAgent;
}
if (timeout.HasValue)
{
request.Timeout = timeout.Value;
}
if (cookies != null)
{
request.CookieContainer = new CookieContainer();
request.CookieContainer.Add(cookies);
} HttpWebResponse httpWebResponse = request.GetResponse() as HttpWebResponse; StreamReader reader = new StreamReader(httpWebResponse.GetResponseStream(),
System.Text.Encoding.GetEncoding(encoding)); string html = "";
//获取请求到的数据
html = reader.ReadToEnd();
//关闭
httpWebResponse.Close();
reader.Close(); Regex regex = new Regex("charset=(?<code>\\w+)\"");
Match match = regex.Match(html);
string code = match.Groups["code"].Value;
if (!string.IsNullOrWhiteSpace(code) && code.ToLower() != encoding.ToLower())
{
return CreateGetHttpResponse(url, timeout, userAgent, cookies, callback, code);
}
else
{
callback(html);
return httpWebResponse;
}
}
catch
{
callback(null);
}
return 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="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>
private static HttpWebResponse CreatePostHttpResponse(string url, IDictionary<string, string> parameters,
int? timeout, string userAgent, Encoding requestEncoding, CookieCollection cookies, Action<string> callback)
{
if (string.IsNullOrEmpty(url))
{
throw new ArgumentNullException("url");
}
if (requestEncoding == null)
{
throw new ArgumentNullException("requestEncoding");
}
HttpWebRequest request = null;
try
{
//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 = "application/x-www-form-urlencoded"; if (!string.IsNullOrEmpty(userAgent))
{
request.UserAgent = userAgent;
}
else
{
request.UserAgent = DefaultUserAgent;
} if (timeout.HasValue)
{
request.Timeout = timeout.Value;
}
if (cookies != null)
{
request.CookieContainer = new CookieContainer();
request.CookieContainer.Add(cookies);
}
//如果需要POST数据
if (!(parameters == null || parameters.Count == ))
{
StringBuilder buffer = new StringBuilder();
int i = ;
foreach (string key in parameters.Keys)
{
if (i > )
{
buffer.AppendFormat("&{0}={1}", key, parameters[key]);
}
else
{
buffer.AppendFormat("{0}={1}", key, parameters[key]);
}
i++;
}
byte[] data = requestEncoding.GetBytes(buffer.ToString());
using (Stream stream = request.GetRequestStream())
{
stream.Write(data, , data.Length);
}
} HttpWebResponse httpWebResponse = request.GetResponse() as HttpWebResponse; StreamReader reader = new StreamReader(httpWebResponse.GetResponseStream(),
System.Text.Encoding.GetEncoding("utf-8")); string html = "";
//获取请求到的数据
html = reader.ReadToEnd(); //关闭
httpWebResponse.Close();
reader.Close(); callback(html); return httpWebResponse;
}
catch
{
callback(null);
}
return null;
} private static HttpWebResponse CreatePostHttpResponse(string url, string parameters, int? timeout,
string userAgent, Encoding requestEncoding, CookieCollection cookies, Action<string> callback)
{
if (string.IsNullOrEmpty(url))
{
return null;
//throw new ArgumentNullException("url");
}
if (requestEncoding == null)
{
throw new ArgumentNullException("requestEncoding");
}
HttpWebRequest request = null;
try
{
//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 = "application/x-www-form-urlencoded"; if (!string.IsNullOrEmpty(userAgent))
{
request.UserAgent = userAgent;
}
else
{
request.UserAgent = DefaultUserAgent;
} if (timeout.HasValue)
{
request.Timeout = timeout.Value;
}
if (cookies != null)
{
request.CookieContainer = new CookieContainer();
request.CookieContainer.Add(cookies);
}
//如果需要POST数据
if (!string.IsNullOrEmpty(parameters))
{
using (var streamWriter = new StreamWriter(request.GetRequestStream()))
{
streamWriter.Write(parameters);
streamWriter.Flush();
}
} HttpWebResponse httpWebResponse = request.GetResponse() as HttpWebResponse; StreamReader reader = new StreamReader(httpWebResponse.GetResponseStream(),
System.Text.Encoding.GetEncoding("utf-8")); string html = "";
//获取请求到的数据
html = reader.ReadToEnd(); //关闭
httpWebResponse.Close();
reader.Close(); callback(html); return httpWebResponse;
}
catch
{
callback(null);
}
return null;
} private static bool CheckValidationResult(object sender, X509Certificate certificate, X509Chain chain,
SslPolicyErrors errors)
{
return true; //总是接受
} }
使用方法
HttpQuery.Post(url, new { key = key, xmlCount = xmlCount }, (msg) =>
{
});