WebServiceCaller

  1 /*  jonney 2015-09-19 */
  2 
  3 using System;
  4 using System.Collections;
  5 using System.Collections.Generic;
  6 using System.Globalization;
  7 using System.IO;
  8 using System.Net;
  9 using System.Text;
 10 using System.Xml;
 11 using System.Xml.Serialization;
 12 
 13 namespace Downloader
 14 {
 15     /// <summary>
 16     ///  利用WebRequest/WebResponse进行WebService调用的类
 17     /// </summary>
 18     public class WebServiceCaller
 19     {
 20         /// <summary>
 21         /// 需要WebService支持Get调用
 22         /// </summary>
 23         public static XmlDocument QueryGetWebService(String url, String methodName, Dictionary<string, object> pars)
 24         {
 25             var request = (HttpWebRequest)WebRequest.Create(url + "/" + methodName + "?" + ParsToString(pars));
 26             request.Method = "GET";
 27             request.ContentType = "application/x-www-form-urlencoded";
 28             SetWebRequest(request);
 29             return ReadXmlResponse(request.GetResponse());
 30         }
 31 
 32         /// <summary>
 33         /// 需要WebService支持Post调用
 34         /// </summary>
 35         public static XmlDocument QueryPostWebService(String url, String methodName, Dictionary<string, object> pars)
 36         {
 37             var request = (HttpWebRequest)WebRequest.Create(url + "/" + methodName);
 38             request.Method = "POST";
 39             request.ContentType = "application/x-www-form-urlencoded;";
 40             SetWebRequest(request);
 41             byte[] data = EncodePars(pars);
 42             WriteRequestData(request, data);
 43             return ReadXmlResponse(request.GetResponse());
 44         }
 45 
 46         /// <summary>
 47         /// 通用WebService调用(Soap),参数Pars为String类型的参数名、参数值
 48         /// </summary>
 49         public static XmlDocument QuerySoapWebService(String url, String methodName, Dictionary<string, object> pars)
 50         {
 51             if (XmlNamespaces.ContainsKey(url + methodName))
 52             {
 53                 string[] echo = XmlNamespaces[url + methodName].ToString().Split(‘`‘);
 54                 string xmlNs = echo[0];
 55                 string xmlSoapAction = echo[1];
 56                 return QuerySoapWebService(url, methodName, pars, xmlNs, xmlSoapAction);
 57             }
 58             string soapAction = "";
 59             string nameSpace = GetNamespace(url, methodName, ref soapAction);
 60             return QuerySoapWebService(url, methodName, pars, nameSpace, soapAction);
 61         }
 62 
 63         /// <summary>
 64         /// 需要WebService支持Post调用,返回Json
 65         /// </summary>
 66         public static string QueryPostWebService(String endPoint, StringBuilder postData)
 67         {
 68             var request = (HttpWebRequest)WebRequest.Create(endPoint);
 69             request.Method = "POST";
 70             request.ContentType = "application/json";
 71             SetWebRequest(request);
 72             byte[] data = Encoding.UTF8.GetBytes(postData.ToString());
 73             WriteRequestData(request, data);
 74             return ReadTxtResponse(request.GetResponse());
 75         }
 76 
 77         /// <summary>
 78         /// 需要WebService支持Post调用,返回字节流
 79         /// </summary>
 80         public static byte[] QueryPostWebService(String endPoint, string postData)
 81         {
 82             var request = (HttpWebRequest)WebRequest.Create(endPoint);
 83             request.Method = "POST";
 84             request.ContentType = "application/json";
 85             SetWebRequest(request);
 86             byte[] data = Encoding.UTF8.GetBytes(postData);
 87             WriteRequestData(request, data);
 88 
 89             using (var response = (HttpWebResponse)request.GetResponse())
 90             {
 91                 if (response.StatusCode != HttpStatusCode.OK)
 92                 {
 93                     var message = String.Format(CultureInfo.CurrentCulture, "Request failed. Received HTTP {0}", response.StatusCode);
 94                     throw new WebException(message);
 95                 }
 96                 using (var result = new MemoryStream())
 97                 {
 98                     const int bufferLen = 2048;
 99                     var buffer = new byte[bufferLen];
100                     using (var responseStream = response.GetResponseStream())
101                     {
102                         var len = responseStream.Read(buffer, 0, bufferLen);
103                         while (len > 0)
104                         {
105                             result.Write(buffer, 0, len);
106                             len = responseStream.Read(buffer, 0, bufferLen);
107                         }
108                     }
109                     return result.ToArray();
110                 }
111             }
112         }
113 
114         private static XmlDocument QuerySoapWebService(String url, String methodName, Dictionary<string, object> pars, string xmlNs, string soapAction)
115         {
116             XmlNamespaces[url + methodName] = xmlNs + "`" + soapAction;//加入缓存，提高效率
117             var request = (HttpWebRequest)WebRequest.Create(url);
118             request.Method = "POST";
119             request.ContentType = "text/xml; charset=utf-8;";
120             string temSoapAction = "\"" + soapAction + "\"";
121             request.Headers.Add("SOAPAction", temSoapAction);
122             SetWebRequest(request);
123             byte[] data = EncodeParsToSoap(pars, xmlNs, methodName);
124             WriteRequestData(request, data);
125             var doc2 = new XmlDocument();
126             XmlDocument doc = ReadXmlResponse(request.GetResponse());
127             var mgr = new XmlNamespaceManager(doc.NameTable);
128             mgr.AddNamespace("soap", "http://schemas.xmlsoap.org/soap/envelope/");
129             var xmlNode = doc.SelectSingleNode("//soap:Body/*", mgr);
130             if (xmlNode != null)
131             {
132                 String retXml = xmlNode.InnerXml;
133                 doc2.LoadXml("<root>" + retXml + "</root>");
134             }
135             else throw new SystemException("Get soap:Body null");
136             AddDelaration(doc2);
137             return doc2;
138         }
139 
140         private static string GetNamespace(String url, string method, ref string pSoapAction)
141         {
142             var doc = new XmlDocument();
143             var request = (HttpWebRequest)WebRequest.Create(url + "?wsdl");
144             SetWebRequest(request);
145             using (var response = (HttpWebResponse)request.GetResponse())
146             {
147                 if (response.StatusCode != HttpStatusCode.OK)
148                 {
149                     var message = String.Format(CultureInfo.CurrentCulture, "Request failed. Received HTTP {0}", response.StatusCode);
150                     throw new SystemException(message);
151                 }
152                 using (var responseStream = response.GetResponseStream())
153                 {
154                     if (responseStream != null)
155                     {
156                         using (var sr = new StreamReader(responseStream, Encoding.UTF8))
157                         {
158                             doc.LoadXml(sr.ReadToEnd());
159                         }
160                     }
161                     else throw new SystemException("GetNamespace url error");
162                 }
163             }
164             var xmlNode = doc.SelectSingleNode("//@targetNamespace");
165             XmlNodeList soapActionList = doc.SelectNodes("//@soapAction");
166             if (soapActionList!=null)
167             {
168                 for (int i = 0; i < soapActionList.Count; i++)
169                 {
170                     var item = soapActionList.Item(i);
171                     if (item != null && item.Value.EndsWith("/" + method))
172                     {
173                         pSoapAction = item.Value;
174                     }
175                 }
176             }
177             if (xmlNode != null)
178                 return xmlNode.Value;
179             throw new SystemException("GetNamespace xmlNode null");
180         }
181 
182         private static byte[] EncodeParsToSoap(Dictionary<string, object> pars, String xmlNs, String methodName)
183         {
184             var doc = new XmlDocument();
185             doc.LoadXml("<soap:Envelope xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" xmlns:xsd=\"http://www.w3.org/2001/XMLSchema\" xmlns:soap=\"http://schemas.xmlsoap.org/soap/envelope/\"></soap:Envelope>");
186             AddDelaration(doc);
187             XmlElement soapBody = doc.CreateElement("soap", "Body", "http://schemas.xmlsoap.org/soap/envelope/");
188             XmlElement soapMethod = doc.CreateElement(methodName);
189             soapMethod.SetAttribute("xmlns", xmlNs);
190             foreach (string k in pars.Keys)
191             {
192                 XmlElement soapPar = doc.CreateElement(k);
193                 soapPar.InnerXml = ObjectToSoapXml(pars[k]);
194                 soapMethod.AppendChild(soapPar);
195             }
196             soapBody.AppendChild(soapMethod);
197             if (doc.DocumentElement != null) doc.DocumentElement.AppendChild(soapBody);
198             return Encoding.UTF8.GetBytes(doc.OuterXml);
199         }
200 
201         private static string ObjectToSoapXml(object o)
202         {
203             var doc = new XmlDocument();
204             var mySerializer = new XmlSerializer(o.GetType());
205             using (var ms = new MemoryStream())
206             {
207                 mySerializer.Serialize(ms, o);
208                 doc.LoadXml(Encoding.UTF8.GetString(ms.ToArray(), 0, (int)ms.Length));
209             }
210             if (doc.DocumentElement != null)
211             {
212                 return doc.DocumentElement.InnerXml;
213             }
214             return o.ToString();
215         }
216 
217         private static void SetWebRequest(HttpWebRequest request)
218         {
219             request.Credentials = CredentialCache.DefaultCredentials;
220             request.Timeout = 10000;
221         }
222 
223         private static void WriteRequestData(HttpWebRequest request, byte[] data)
224         {
225             request.ContentLength = data.Length;
226             using (Stream writer = request.GetRequestStream())
227             {
228                 writer.Write(data, 0, data.Length);
229             }
230         }
231 
232         private static byte[] EncodePars(Dictionary<string, object> pars)
233         {
234             var sb = new StringBuilder();
235             sb.Append("{");
236             foreach (string k in pars.Keys)
237             {
238                 if (sb.Length > 1)
239                 {
240                     sb.Append(",");
241                 }
242                 sb.Append("\"" + k + "\"" + ":" + "\"" + pars[k] + "\"");
243             } 
244             sb.Append("}");
245             return Encoding.UTF8.GetBytes(sb.ToString());
246         }
247 
248         private static String ParsToString(Dictionary<string, object> pars)
249         {
250             var sb = new StringBuilder();
251             foreach (string k in pars.Keys)
252             {
253                 if (sb.Length > 0)
254                 {
255                     sb.Append("&");
256                 }
257                 sb.Append(k + "=" + pars[k]);
258             }
259             return sb.ToString();
260         }
261 
262         private static XmlDocument ReadXmlResponse(WebResponse resp)
263         {
264             var doc = new XmlDocument();
265             using (var response = (HttpWebResponse)resp)
266             {
267                 if (response.StatusCode != HttpStatusCode.OK)
268                 {
269                     var message = String.Format(CultureInfo.CurrentCulture, "Request failed. Received HTTP {0}", response.StatusCode);
270                     throw new SystemException(message);
271                 }
272                 using (var responseStream = resp.GetResponseStream())
273                 {
274                     if (responseStream != null)
275                         using (var sr = new StreamReader(responseStream, Encoding.UTF8))
276                         {
277                             doc.LoadXml(sr.ReadToEnd());
278                         }
279                 }
280             }
281             return doc;
282         }
283 
284         private static string ReadTxtResponse(WebResponse resp)
285         {
286             using (var response = (HttpWebResponse)resp)
287             {
288                 var responseValue = string.Empty;
289                 if (response.StatusCode != HttpStatusCode.OK)
290                 {
291                     var message = String.Format(CultureInfo.CurrentCulture, "Request failed. Received HTTP {0}", response.StatusCode);
292                     throw new SystemException(message);
293                 }
294                 using (var responseStream = response.GetResponseStream())
295                 {
296                     if (responseStream != null)
297                         using (var sr = new StreamReader(responseStream, Encoding.UTF8))
298                         {
299                             responseValue = sr.ReadToEnd();
300                         }
301                 }
302                 return responseValue;
303             }
304         }
305 
306         private static void AddDelaration(XmlDocument doc)
307         {
308             XmlDeclaration decl = doc.CreateXmlDeclaration("1.0", "utf-8", null);
309             doc.InsertBefore(decl, doc.DocumentElement);
310         }
311 
312         private static readonly Hashtable XmlNamespaces = new Hashtable();//缓存xmlNamespace，避免重复调用GetNamespace
313     }
314 }