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public class BaseHttpClient { protected string contentType; public BaseHttpClient() { this.contentType = "application/json"; } protected const int RESPONSE_OK = 200; //设置读取超时时间 private const int DEFAULT_SOCKET_TIMEOUT = (30 * 1000); // milliseconds /// <summary> /// HTTP 验证 /// </summary> /// <returns></returns> public virtual Dictionary<string, string> Authorization() { return null; } /// <summary> /// 构建请求参数 /// </summary> /// <param name="dicList"></param> /// <returns></returns> public String BuildQueryStr(Dictionary<String, String> dicList) { String postStr = dicList.Aggregate("", (current, item) => current + item.Key + "=" + HttpUtility.UrlEncode(item.Value, Encoding.UTF8) + "&"); postStr = postStr.Substring(0, postStr.LastIndexOf('&')); return postStr; } /// <summary> /// 发送请求 /// </summary> /// <param name="method">请求方式</param> /// <param name="url">请求链接</param> /// <param name="reqParams">请求参数</param> /// <returns></returns> public ResultDTO SendRequest(Method method, String url, String reqParams) { HttpWebRequest myReq = null; HttpWebResponse response = null; try { if (method == Method.Get||method==Method.Delete) { url += "?" + reqParams; } myReq = (HttpWebRequest) WebRequest.Create(url); myReq.Method = method.ToString(); myReq.ReadWriteTimeout = DEFAULT_SOCKET_TIMEOUT; myReq.ContentType = contentType; //权限验证 var auth = this.Authorization(); if (auth != null) { foreach (var item in auth) { myReq.Headers.Add(item.Key, item.Value); } } if (myReq.Method == "POST" || myReq.Method == "Put") { byte[] bs = Encoding.UTF8.GetBytes(reqParams); myReq.ContentLength = bs.Length; using (Stream reqStream = myReq.GetRequestStream()) { reqStream.Write(bs, 0, bs.Length); reqStream.Close(); } } response = (HttpWebResponse) myReq.GetResponse(); if (Equals(response.StatusCode, HttpStatusCode.OK) || Equals(response.StatusCode, HttpStatusCode.Created)) { using (StreamReader reader = new StreamReader(response.GetResponseStream(), Encoding.UTF8)) { return WebApi.Success(reader.ReadToEnd()); } } return WebApi.Error(""); } catch (WebException e) { if (e.Status == WebExceptionStatus.ProtocolError) { //HttpStatusCode errorCode = ((HttpWebResponse) e.Response).StatusCode; //string statusDescription = ((HttpWebResponse)e.Response).StatusDescription; using (StreamReader sr = new StreamReader(((HttpWebResponse) e.Response).GetResponseStream(), Encoding.UTF8)) { return WebApi.Error(sr.ReadToEnd()); } } return WebApi.Error(e.Message); } //这里不再抓取非http的异常,如果异常抛出交给开发者自行处理 //catch (System.Exception ex) //{ // String errorMsg = ex.Message; // Debug.Print(errorMsg); //} finally { if (response != null) { response.Close(); } if (myReq != null) { myReq.Abort(); } } } } //请求方式 public enum Method { Post, Delete, Get, Put }
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