using System; using System.Collections.Generic; using System.IO; using System.Linq; using System.Net; using System.Text; using System.Threading.Tasks; using Newtonsoft.Json.Linq; namespace Share { public class HttpHelp { /// <summary> /// url为请求的网址，param参数为需要查询的条件（服务端接收的参数，没有则为null） /// </summary> /// <param name="url"></param> /// <param name="param"></param> /// <returns></returns> public static string Get(string url, Dictionary<string, string> param) { if (param != null) //有参数的情况下，拼接url { url = url + "?"; url = param.Aggregate(url, (current, item) => current + item.Key + "=" + item.Value + "&"); url = url.Substring(0, url.Length - 1); } #region 写日记 LogHelp.WriteLog(url); #endregion HttpWebRequest request = WebRequest.Create(url) as HttpWebRequest;//创建请求 request.Method = "GET"; //请求方法为GET HttpWebResponse res; //定义返回的response try { res = (HttpWebResponse)request.GetResponse(); //此处发送了请求并获得响应 } catch (WebException ex) { res = (HttpWebResponse)ex.Response; } StreamReader sr = new StreamReader(res.GetResponseStream(), Encoding.UTF8); string content = sr.ReadToEnd(); //响应转化为String字符串 return content; } //url为请求的网址，param为需要传递的参数 //返回服务端的额响应 /// <summary> /// url为请求的网址，param为需要传递的参数 /// </summary> /// <param name="url"></param> /// <param name="param"></param> /// <returns></returns> public static string Post(string url, Dictionary<String, String> param) { #region 写日记 string parameterSt = ""; if (param.Count != 0) //将参数添加到json对象中 { foreach (var item in param) { parameterSt += "&" + item.Key + "=" + item.Value; } } LogHelp.WriteLog(url + parameterSt); #endregion HttpWebRequest request = WebRequest.Create(url) as HttpWebRequest; //创建请求 CookieContainer cookieContainer = new CookieContainer(); request.CookieContainer = cookieContainer; request.AllowAutoRedirect = true; //request.AllowReadStreamBuffering = true; request.MaximumResponseHeadersLength = 1024; request.Method = "POST"; //请求方式为post request.AllowAutoRedirect = true; request.MaximumResponseHeadersLength = 1024; request.ContentType = "application/json"; JObject json = new JObject(); if (param.Count != 0) //将参数添加到json对象中 { foreach (var item in param) { json.Add(item.Key, item.Value); } } string jsonstring = json.ToString();//获得参数的json字符串 byte[] jsonbyte = Encoding.UTF8.GetBytes(jsonstring); Stream postStream = request.GetRequestStream(); postStream.Write(jsonbyte, 0, jsonbyte.Length); postStream.Close(); //发送请求并获取相应回应数据 HttpWebResponse res; try { res = (HttpWebResponse)request.GetResponse(); } catch (WebException ex) { res = (HttpWebResponse)ex.Response; } StreamReader sr = new StreamReader(res.GetResponseStream(), Encoding.UTF8); string content = sr.ReadToEnd(); //获得响应字符串 return content; } //url为请求的网址，param为需要传递的参数 //返回服务端的额响应 /// <summary> /// url为请求的网址，param为需要传递的参数 /// </summary> /// <param name="url"></param> /// <param name="param"></param> /// <returns></returns> public static string Post(string url, string jsonstring = "") { #region 写日记 LogHelp.WriteLog(url + jsonstring); #endregion HttpWebRequest request = WebRequest.Create(url) as HttpWebRequest; //创建请求 CookieContainer cookieContainer = new CookieContainer(); request.CookieContainer = cookieContainer; request.AllowAutoRedirect = true; //request.AllowReadStreamBuffering = true; request.MaximumResponseHeadersLength = 1024; request.Method = "POST"; //请求方式为post request.AllowAutoRedirect = true; request.MaximumResponseHeadersLength = 1024; request.ContentType = "application/json"; byte[] jsonbyte = Encoding.UTF8.GetBytes(jsonstring); Stream postStream = request.GetRequestStream(); postStream.Write(jsonbyte, 0, jsonbyte.Length); postStream.Close(); //发送请求并获取相应回应数据 HttpWebResponse res; try { res = (HttpWebResponse)request.GetResponse(); } catch (WebException ex) { res = (HttpWebResponse)ex.Response; } StreamReader sr = new StreamReader(res.GetResponseStream(), Encoding.UTF8); string content = sr.ReadToEnd(); //获得响应字符串 return content; } /// <summary> /// HttpUploadFile 上传文件 HttpUploadFile("http://localhost/Test", new string[] { @"E:\Index.htm", @"E:\test.rar" }, data)); /// </summary> /// <param name="url"></param> /// <param name="files"></param> /// <param name="data"></param> /// <returns></returns> public static string HttpUploadFile(string url, string[] files, Dictionary<string, string> param = null) { Encoding encoding = Encoding.UTF8; string boundary = "---------------------------" + DateTime.Now.Ticks.ToString("x"); byte[] boundarybytes = Encoding.ASCII.GetBytes("\r\n--" + boundary + "\r\n"); byte[] endbytes = Encoding.ASCII.GetBytes("\r\n--" + boundary + "--\r\n"); //1.HttpWebRequest HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url); request.ContentType = "multipart/form-data; boundary=" + boundary; request.Method = "POST"; request.KeepAlive = true; request.Credentials = CredentialCache.DefaultCredentials; using (Stream stream = request.GetRequestStream()) { //1.1 key/value string formdataTemplate = "Content-Disposition: form-data; name=\"{0}\"\r\n\r\n{1}"; if (param != null) { foreach (string key in param.Keys) { stream.Write(boundarybytes, 0, boundarybytes.Length); string formitem = string.Format(formdataTemplate, key, param[key]); byte[] formitembytes = encoding.GetBytes(formitem); stream.Write(formitembytes, 0, formitembytes.Length); } } //1.2 file string headerTemplate = "Content-Disposition: form-data; name=\"{0}\"; filename=\"{1}\"\r\nContent-Type: application/octet-stream\r\n\r\n"; byte[] buffer = new byte[4096]; int bytesRead = 0; for (int i = 0; i < files.Length; i++) { stream.Write(boundarybytes, 0, boundarybytes.Length); string header = string.Format(headerTemplate, "file" + i, Path.GetFileName(files[i])); byte[] headerbytes = encoding.GetBytes(header); stream.Write(headerbytes, 0, headerbytes.Length); using (FileStream fileStream = new FileStream(files[i], FileMode.Open, FileAccess.Read)) { while ((bytesRead = fileStream.Read(buffer, 0, buffer.Length)) != 0) { stream.Write(buffer, 0, bytesRead); } } } //1.3 form end stream.Write(endbytes, 0, endbytes.Length); } //2.WebResponse HttpWebResponse response = (HttpWebResponse)request.GetResponse(); using (StreamReader stream = new StreamReader(response.GetResponseStream())) { return stream.ReadToEnd(); } } /// <summary> /// 文件下载 /// </summary> /// <param name="url">抓取url</param> /// <param name="filePath">保存文件名</param> /// <param name="oldurl">来源路径</param> /// <returns></returns> public static void HttpDownloadFile(string url, string filePath) { try { HttpWebRequest Myrq = (HttpWebRequest)HttpWebRequest.Create(url); HttpWebResponse myrp = (HttpWebResponse)Myrq.GetResponse(); long totalBytes = myrp.ContentLength; Stream st = myrp.GetResponseStream(); Stream so = new FileStream(filePath, FileMode.Create); long totalDownloadedByte = 0; byte[] by = new byte[1024]; int osize = st.Read(by, 0, (int)by.Length); while (osize > 0) { totalDownloadedByte = osize + totalDownloadedByte; so.Write(by, 0, osize); osize = st.Read(by, 0, (int)by.Length); } so.Close(); st.Close(); } catch (Exception ex) { LogHelp.WriteLog(ex.Message + ex.StackTrace); } } } }
用法：
public FindCabinetListRpModel FindCabinetList(FindCabinetListRt rt) { GetToken(rt); ConvertHelp.NoProperties.Clear(); string parameterSt = ConvertHelp.GetProperties(rt); Uri address = new Uri(_baseAddress + "/pickup/findCabinetList?" + parameterSt); string rpJson = HttpHelp.Post(address.ToString()); try { //调用接口 var rpModel = JSONHelp.parse<FindCabinetListRpModel>(rpJson); return rpModel; } catch (Exception ex) { throw ex; } }