C#调用http请求，HttpWebRequest添加http请求头信息
最近经常涉及到与各大web接口对接，调用对方webapi 的业务需要。无奈写下此小工具，方便后期摘抄，也希望能帮助到需要的你。废话不多说，直接上干货：
1 using System; 2 using System.Collections.Generic; 3 using System.IO; 4 using System.Linq; 5 using System.Net; 6 using System.Text; 7 using System.Threading.Tasks; 8 9 namespace http 10 { 11 class Program 12 { 13 static void Main(string[] args) 14 { 15 string Datas = @"{ ""cainfo"": ""1"", ""dev_no"": ""1"", ""dev_safe_info"": ""1"", ""fixmedins_code"": ""060070"", ""fixmedins_name"": ""朝阳医院"", ""inf_time"": ""2020-09-29 02:49:11"", ""infno"": ""1101"", ""infver"": ""V1.0"", ""insuplc_admdvs"": ""340600"", ""mdtrtarea_admvs"": ""340600"", ""msgid"": ""1232342423"", ""opter"": ""14"", ""opter_name"": ""csb-测试"", ""opter_type"": ""1"", ""recer_sys_code"": ""1"", ""sign_no"": ""1"", ""signtype"": ""1"" }"; 16 //调用post请求 17 string retString = httpPost("http://127.0.0.1/admin/ajax/test", Datas); 18 19 //调用get请求 20 string retString2 = httpGet("http://127.0.0.1/admin/ajax/test"); 21 //http://csb-broker.cloud.ahhb.hsip.gov.cn:8086/1.0.0/hsa-fsi-1101 22 23 Console.WriteLine(retString); 24 Console.WriteLine("--===========↑上面是post请求返回的数据 ↓下面是get请求返回的数据==============="); 25 Console.WriteLine(retString2); 26 Console.ReadKey(); 27 } 28 29 30 public static string httpPost(string url,string data) { 31 32 string retString = String.Empty; 33 string paramData = data; 34 //CookieContainer cookie = new CookieContainer(); 35 //HttpWebRequest request = (HttpWebRequest)WebRequest.Create("http://csb-broker.cloud.ahhb.hsip.gov.cn:8086/1.0.0/hsa-fsi-1101"); 36 HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url); 37 request.Method = "POST"; 38 //request.Referer = Referer; 39 byte[] bytes = Encoding.UTF8.GetBytes(paramData); 40 request.Accept = "text/html, application/xhtml+xml, */*"; 41 //request.ContentType = "application/*"; 42 request.ContentType = "application/x-www-form-urlencoded"; 43 //设置C# HttpWebRequest post请求头消息 44 request.Headers.Add("version", "1.0.0"); 45 request.Headers.Add("ak", "45b83b3b780d46028afa1da41dcdd0a4"); 46 request.Headers.Add("sk", "1+JX1Gsg3hEu4Ui+VdQvWlaz1gY="); 47 request.ContentLength = bytes.Length; 48 try 49 { 50 Stream myResponseStream = request.GetRequestStream(); 51 myResponseStream.Write(bytes, 0, bytes.Length); 52 HttpWebResponse response = (HttpWebResponse)request.GetResponse(); 53 StreamReader myStreamReader = new StreamReader(response.GetResponseStream(), Encoding.UTF8); 54 retString = myStreamReader.ReadToEnd(); 55 int statusCode = (int)response.StatusCode; 56 if (statusCode == 200) 57 { 58 // Console.WriteLine(statusCode); 59 myStreamReader.Close(); 60 myResponseStream.Close(); 61 62 if (response != null) 63 { 64 response.Close(); 65 } 66 if (request != null) 67 { 68 request.Abort(); 69 } 70 } 71 } 72 catch (Exception ex) 73 { 74 //抛出异常返回具体错误消息 75 retString = ex.Message; 76 } 77 return retString; 78 } 79 80 81 public static string httpGet(string Url) 82 { 83 string retString = string.Empty; 84 //System.GC.Collect(); 85 HttpWebRequest request = (HttpWebRequest)WebRequest.Create(Url); 86 request.Proxy = null; 87 request.KeepAlive = false; 88 request.Method = "GET"; 89 request.ContentType = "application/json; charset=UTF-8"; 90 request.AutomaticDecompression = DecompressionMethods.GZip; 91 try 92 { 93 HttpWebResponse response = (HttpWebResponse)request.GetResponse(); 94 Stream myResponseStream = response.GetResponseStream(); 95 StreamReader myStreamReader = new StreamReader(myResponseStream, Encoding.UTF8); 96 retString = myStreamReader.ReadToEnd(); 97 myStreamReader.Close(); 98 myResponseStream.Close(); 99 100 if (response != null) 101 { 102 response.Close(); 103 } 104 if (request != null) 105 { 106 request.Abort(); 107 } 108 }catch(Exception ex){ 109 //抛出异常返回具体错误消息 110 retString = ex.Message; 111 } 112 return retString; 113 } 114 } 115 }
运行的效果如下：
把post和get放在一起调用了 都调用成功的情况
主机不存在的情况或者是服务端没有打开的情况
服务端错误情况
