1 /// <summary>
2 /// 有关HTTP请求的辅助类
3 /// </summary>
4 public class HttpQuery
5 {
6 private static readonly string DefaultUserAgent =
7 "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.2; SV1; .NET CLR 1.1.4322; .NET CLR 2.0.50727)";
8
9 public static void Get(string url, object data, Action<string> callback)
10 {
11 IDictionary<string, string> parameters = Getparameters(data);
12
13 if (!(parameters == null || parameters.Count == 0))
14 {
15 url += "?";
16 foreach (var item in parameters)
17 {
18 url += item.Key + "=" + item.Value + "&";
19 }
20 }
21 CreateGetHttpResponse(url, null, null, null, callback);
22 }
23
24 public static void Post(string url, object data, Action<string> callback)
25 {
26 IDictionary<string, string> parameters = Getparameters(data);
27
28 CreatePostHttpResponse(url, parameters, null, null, Encoding.UTF8, null, callback);
29 }
30
31 public static void Post(string url, string data, Action<string> callback)
32 {
33 CreatePostHttpResponse(url, data, null, null, Encoding.UTF8, null, callback);
34 }
35
36 private static IDictionary<string, string> Getparameters(object data)
37 {
38 if (data == null)
39 {
40 return new Dictionary<string, string>();
41 }
42 IDictionary<string, string> parameters = new Dictionary<string, string>();
43
44 Type type = data.GetType();
45 PropertyInfo[] props = type.GetProperties(BindingFlags.Public | BindingFlags.Instance);
46 foreach (PropertyInfo p in props)
47 {
48 parameters.Add(p.Name, p.GetValue(data).ToString());
49 }
50
51 return parameters;
52 }
53
54 /// <summary>
55 /// 创建GET方式的HTTP请求
56 /// </summary>
57 /// <param name="url">请求的URL</param>
58 /// <param name="timeout">请求的超时时间</param>
59 /// <param name="userAgent">请求的客户端浏览器信息，可以为空</param>
60 /// <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>
61 /// <returns></returns>
62 private static HttpWebResponse CreateGetHttpResponse(string url, int? timeout, string userAgent,
63 CookieCollection cookies, Action<string> callback, string encoding = "utf-8")
64 {
65 if (string.IsNullOrEmpty(url))
66 {
67 return null;
68 //throw new ArgumentNullException("url");
69 }
70 try
71 {
72 HttpWebRequest request = WebRequest.Create(url) as HttpWebRequest;
73 request.Method = "GET";
74 request.UserAgent = DefaultUserAgent;
75 if (!string.IsNullOrEmpty(userAgent))
76 {
77 request.UserAgent = userAgent;
78 }
79 if (timeout.HasValue)
80 {
81 request.Timeout = timeout.Value;
82 }
83 if (cookies != null)
84 {
85 request.CookieContainer = new CookieContainer();
86 request.CookieContainer.Add(cookies);
87 }
88
89 HttpWebResponse httpWebResponse = request.GetResponse() as HttpWebResponse;
90
91 StreamReader reader = new StreamReader(httpWebResponse.GetResponseStream(),
92 System.Text.Encoding.GetEncoding(encoding));
93
94 string html = "";
95 //获取请求到的数据
96 html = reader.ReadToEnd();
97 //关闭
98 httpWebResponse.Close();
99 reader.Close();
100
101 Regex regex = new Regex("charset=(?<code>\\w+)\"");
102 Match match = regex.Match(html);
103 string code = match.Groups["code"].Value;
104 if (!string.IsNullOrWhiteSpace(code) && code.ToLower() != encoding.ToLower())
105 {
106 return CreateGetHttpResponse(url, timeout, userAgent, cookies, callback, code);
107 }
108 else
109 {
110 callback(html);
111 return httpWebResponse;
112 }
113 }
114 catch
115 {
116 callback(null);
117 }
118 return null;
119 }
120
121 /// <summary>
122 /// 创建POST方式的HTTP请求
123 /// </summary>
124 /// <param name="url">请求的URL</param>
125 /// <param name="parameters">随同请求POST的参数名称及参数值字典</param>
126 /// <param name="timeout">请求的超时时间</param>
127 /// <param name="userAgent">请求的客户端浏览器信息，可以为空</param>
128 /// <param name="requestEncoding">发送HTTP请求时所用的编码</param>
129 /// <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>
130 /// <returns></returns>
131 private static HttpWebResponse CreatePostHttpResponse(string url, IDictionary<string, string> parameters,
132 int? timeout, string userAgent, Encoding requestEncoding, CookieCollection cookies, Action<string> callback)
133 {
134 if (string.IsNullOrEmpty(url))
135 {
136 throw new ArgumentNullException("url");
137 }
138 if (requestEncoding == null)
139 {
140 throw new ArgumentNullException("requestEncoding");
141 }
142 HttpWebRequest request = null;
143 try
144 {
145 //如果是发送HTTPS请求
146 if (url.StartsWith("https", StringComparison.OrdinalIgnoreCase))
147 {
148 ServicePointManager.ServerCertificateValidationCallback =
149 new RemoteCertificateValidationCallback(CheckValidationResult);
150 request = WebRequest.Create(url) as HttpWebRequest;
151 request.ProtocolVersion = HttpVersion.Version10;
152 }
153 else
154 {
155 request = WebRequest.Create(url) as HttpWebRequest;
156 }
157 request.Method = "POST";
158 request.ContentType = "application/x-www-form-urlencoded";
159
160 if (!string.IsNullOrEmpty(userAgent))
161 {
162 request.UserAgent = userAgent;
163 }
164 else
165 {
166 request.UserAgent = DefaultUserAgent;
167 }
168
169 if (timeout.HasValue)
170 {
171 request.Timeout = timeout.Value;
172 }
173 if (cookies != null)
174 {
175 request.CookieContainer = new CookieContainer();
176 request.CookieContainer.Add(cookies);
177 }
178 //如果需要POST数据
179 if (!(parameters == null || parameters.Count == 0))
180 {
181 StringBuilder buffer = new StringBuilder();
182 int i = 0;
183 foreach (string key in parameters.Keys)
184 {
185 if (i > 0)
186 {
187 buffer.AppendFormat("&{0}={1}", key, parameters[key]);
188 }
189 else
190 {
191 buffer.AppendFormat("{0}={1}", key, parameters[key]);
192 }
193 i++;
194 }
195 byte[] data = requestEncoding.GetBytes(buffer.ToString());
196 using (Stream stream = request.GetRequestStream())
197 {
198 stream.Write(data, 0, data.Length);
199 }
200 }
201
202 HttpWebResponse httpWebResponse = request.GetResponse() as HttpWebResponse;
203
204 StreamReader reader = new StreamReader(httpWebResponse.GetResponseStream(),
205 System.Text.Encoding.GetEncoding("utf-8"));
206
207 string html = "";
208 //获取请求到的数据
209 html = reader.ReadToEnd();
210
211 //关闭
212 httpWebResponse.Close();
213 reader.Close();
214
215 callback(html);
216
217 return httpWebResponse;
218 }
219 catch
220 {
221 callback(null);
222 }
223 return null;
224 }
225
226 private static HttpWebResponse CreatePostHttpResponse(string url, string parameters, int? timeout,
227 string userAgent, Encoding requestEncoding, CookieCollection cookies, Action<string> callback)
228 {
229 if (string.IsNullOrEmpty(url))
230 {
231 return null;
232 //throw new ArgumentNullException("url");
233 }
234 if (requestEncoding == null)
235 {
236 throw new ArgumentNullException("requestEncoding");
237 }
238 HttpWebRequest request = null;
239 try
240 {
241 //如果是发送HTTPS请求
242 if (url.StartsWith("https", StringComparison.OrdinalIgnoreCase))
243 {
244 ServicePointManager.ServerCertificateValidationCallback =
245 new RemoteCertificateValidationCallback(CheckValidationResult);
246 request = WebRequest.Create(url) as HttpWebRequest;
247 request.ProtocolVersion = HttpVersion.Version10;
248 }
249 else
250 {
251 request = WebRequest.Create(url) as HttpWebRequest;
252 }
253 request.Method = "POST";
254 request.ContentType = "application/x-www-form-urlencoded";
255
256 if (!string.IsNullOrEmpty(userAgent))
257 {
258 request.UserAgent = userAgent;
259 }
260 else
261 {
262 request.UserAgent = DefaultUserAgent;
263 }
264
265 if (timeout.HasValue)
266 {
267 request.Timeout = timeout.Value;
268 }
269 if (cookies != null)
270 {
271 request.CookieContainer = new CookieContainer();
272 request.CookieContainer.Add(cookies);
273 }
274 //如果需要POST数据
275 if (!string.IsNullOrEmpty(parameters))
276 {
277 using (var streamWriter = new StreamWriter(request.GetRequestStream()))
278 {
279 streamWriter.Write(parameters);
280 streamWriter.Flush();
281 }
282 }
283
284 HttpWebResponse httpWebResponse = request.GetResponse() as HttpWebResponse;
285
286 StreamReader reader = new StreamReader(httpWebResponse.GetResponseStream(),
287 System.Text.Encoding.GetEncoding("utf-8"));
288
289 string html = "";
290 //获取请求到的数据
291 html = reader.ReadToEnd();
292
293 //关闭
294 httpWebResponse.Close();
295 reader.Close();
296
297 callback(html);
298
299 return httpWebResponse;
300 }
301 catch
302 {
303 callback(null);
304 }
305 return null;
306 }
307
308 private static bool CheckValidationResult(object sender, X509Certificate certificate, X509Chain chain,
309 SslPolicyErrors errors)
310 {
311 return true; //总是接受
312 }
313
314 }
使用方法
HttpQuery.Post(url, new { key = key, xmlCount = xmlCount }, (msg) =>
{
});
时间： 2024-08-04 09:46:34