C# 接收http請求

本文轉載自查看原文 2018-08-10 19:16 3806 HttpListner 接收與發送

使用httplistener監聽來自客戶端的http請求，對於Get請求的數據可以通過Request.QueryString["參數"]獲取

而對於來自客戶端的Post請求則不能使用Request[""]獲取，需要將獲取分析請求流中的數據拿到參數

  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 HttpListenerPost  
 10 {  
 11     /// <summary>  
 12     /// HttpListenner監聽Post請求參數值實體  
 13     /// </summary>  
 14     public class HttpListenerPostValue  
 15     {  
 16         /// <summary>  
 17         /// 0=> 參數  
 18         /// 1=> 文件  
 19         /// </summary>  
 20         public int type = 0;  
 21         public string name;  
 22         public byte[] datas;  
 23     }  
 24   
 25     /// <summary>  
 26     /// 獲取Post請求中的參數和值幫助類  
 27     /// </summary>  
 28     public class HttpListenerPostParaHelper  
 29     {  
 30         private HttpListenerContext request;  
 31   
 32         public HttpListenerPostParaHelper(HttpListenerContext request)  
 33         {  
 34             this.request = request;  
 35         }  
 36   
 37         private bool CompareBytes(byte[] source, byte[] comparison)  
 38         {  
 39             try  
 40             {  
 41                 int count = source.Length;  
 42                 if (source.Length != comparison.Length)  
 43                     return false;  
 44                 for (int i = 0; i < count; i++)  
 45                     if (source[i] != comparison[i])  
 46                         return false;  
 47                 return true;  
 48             }  
 49             catch  
 50             {  
 51                 return false;  
 52             }  
 53         }  
 54   
 55         private byte[] ReadLineAsBytes(Stream SourceStream)  
 56         {  
 57             var resultStream = new MemoryStream();  
 58             while (true)  
 59             {  
 60                 int data = SourceStream.ReadByte();  
 61                 resultStream.WriteByte((byte)data);  
 62                 if (data == 10)  
 63                     break;  
 64             }  
 65             resultStream.Position = 0;  
 66             byte[] dataBytes = new byte[resultStream.Length];  
 67             resultStream.Read(dataBytes, 0, dataBytes.Length);  
 68             return dataBytes;  
 69         }  
 70   
 71         /// <summary>  
 72         /// 獲取Post過來的參數和數據  
 73         /// </summary>  
 74         /// <returns></returns>  
 75         public List<HttpListenerPostValue> GetHttpListenerPostValue()  
 76         {  
 77             try  
 78             {  
 79                 List<HttpListenerPostValue> HttpListenerPostValueList = new List<HttpListenerPostValue>();  
 80                 if (request.Request.ContentType.Length > 20 && string.Compare(request.Request.ContentType.Substring(0, 20), "multipart/form-data;", true) == 0)  
 81                 {  
 82                     string[] HttpListenerPostValue = request.Request.ContentType.Split(';').Skip(1).ToArray();  
 83                     string boundary = string.Join(";", HttpListenerPostValue).Replace("boundary=", "").Trim();  
 84                     byte[] ChunkBoundary = Encoding.UTF8.GetBytes("--" + boundary + "\r\n");  
 85                     byte[] EndBoundary = Encoding.UTF8.GetBytes("--" + boundary + "--\r\n");  
 86                     Stream SourceStream = request.Request.InputStream;  
 87                     var resultStream = new MemoryStream();  
 88                     bool CanMoveNext = true;  
 89                     HttpListenerPostValue data = null;  
 90                     while (CanMoveNext)  
 91                     {  
 92                         byte[] currentChunk = ReadLineAsBytes(SourceStream);  
 93                         if (!Encoding.UTF8.GetString(currentChunk).Equals("\r\n"))  
 94                             resultStream.Write(currentChunk, 0, currentChunk.Length);  
 95                         if (CompareBytes(ChunkBoundary, currentChunk))  
 96                         {  
 97                             byte[] result = new byte[resultStream.Length - ChunkBoundary.Length];  
 98                             resultStream.Position = 0;  
 99                             resultStream.Read(result, 0, result.Length);  
100                             CanMoveNext = true;  
101                             if (result.Length > 0)  
102                                 data.datas = result;  
103                             data = new HttpListenerPostValue();  
104                             HttpListenerPostValueList.Add(data);  
105                             resultStream.Dispose();  
106                             resultStream = new MemoryStream();  
107   
108                         }  
109                         else if (Encoding.UTF8.GetString(currentChunk).Contains("Content-Disposition"))  
110                         {  
111                             byte[] result = new byte[resultStream.Length - 2];  
112                             resultStream.Position = 0;  
113                             resultStream.Read(result, 0, result.Length);  
114                             CanMoveNext = true;  
115                             data.name = Encoding.UTF8.GetString(result).Replace("Content-Disposition: form-data; name=\"", "").Replace("\"", "").Split(';')[0];  
116                             resultStream.Dispose();  
117                             resultStream = new MemoryStream();  
118                         }  
119                         else if (Encoding.UTF8.GetString(currentChunk).Contains("Content-Type"))  
120                         {  
121                             CanMoveNext = true;  
122                             data.type = 1;  
123                             resultStream.Dispose();  
124                             resultStream = new MemoryStream();  
125                         }  
126                         else if (CompareBytes(EndBoundary, currentChunk))  
127                         {  
128                             byte[] result = new byte[resultStream.Length - EndBoundary.Length - 2];  
129                             resultStream.Position = 0;  
130                             resultStream.Read(result, 0, result.Length);  
131                             data.datas = result;  
132                             resultStream.Dispose();  
133                             CanMoveNext = false;  
134                         }  
135                     }  
136                 }  
137                 return HttpListenerPostValueList;  
138             }  
139             catch (Exception ex)  
140             {  
141                 return null;  
142             }  
143         }  
144     }  
145 }

開啟監聽，獲取Post請求的參數

 1 class Program  
 2    {  
 3        private static HttpListener httpPostRequest = new HttpListener();  
 4   
 5        static void Main(string[] args)  
 6        {  
 7            httpPostRequest.Prefixes.Add("http://10.0.0.217:30000/posttype/");  
 8            httpPostRequest.Start();  
 9   
10            Thread ThrednHttpPostRequest = new Thread(new ThreadStart(httpPostRequestHandle));  
11            ThrednHttpPostRequest.Start();  
12        }  
13   
14        private static void httpPostRequestHandle()  
15        {  
16            while (true)  
17            {  
18                HttpListenerContext requestContext = httpPostRequest.GetContext();  
19                Thread threadsub = new Thread(new ParameterizedThreadStart((requestcontext) =>  
20                {  
21                    HttpListenerContext request = (HttpListenerContext)requestcontext;  
22   
23                    //獲取Post請求中的參數和值幫助類  
24                    HttpListenerPostParaHelper httppost=new HttpListenerPostParaHelper (request);  
25                    //獲取Post過來的參數和數據  
26                    List<HttpListenerPostValue> lst=httppost.GetHttpListenerPostValue();  
27   
28                    string userName = "";  
29                    string password = "";  
30                    string suffix = "";  
31                    string adType = "";  
32                      
33                    //使用方法  
34                    foreach (var key in lst)  
35                    {  
36                        if (key.type == 0)  
37                        {  
38                            string value = Encoding.UTF8.GetString(key.datas).Replace("\r\n", "");  
39                            if (key.name == "username")  
40                            {  
41                                userName = value;  
42                                Console.WriteLine(value);  
43                            }  
44                            if (key.name == "password")  
45                            {  
46                                password = value;  
47                                Console.WriteLine(value);  
48                            }  
49                            if (key.name == "suffix")  
50                            {  
51                                suffix = value;  
52                                Console.WriteLine(value);  
53                            }  
54                            if (key.name == "adtype")  
55                            {  
56                                adType = value;  
57                                Console.WriteLine(value);  
58                            }     
59                        }  
60                        if (key.type == 1)  
61                        {  
62                            string fileName = request.Request.QueryString["FileName"];  
63                            if (!string.IsNullOrEmpty(fileName))  
64                            {  
65                                string filePath = AppDomain.CurrentDomain.BaseDirectory + DateTime.Now.ToString("yyMMdd_HHmmss_ffff") + Path.GetExtension(fileName).ToLower();  
66                                if (key.name == "File")  
67                                {  
68                                    FileStream fs = new FileStream(filePath, FileMode.Create);  
69                                    fs.Write(key.datas, 0, key.datas.Length);  
70                                    fs.Close();  
71                                    fs.Dispose();  
72                                }  
73                            }  
74                        }  
75                    }  
76   
77                    //Response  
78                    request.Response.StatusCode = 200;  
79                    request.Response.Headers.Add("Access-Control-Allow-Origin", "*");  
80                    request.Response.ContentType = "application/json";  
81                    requestContext.Response.ContentEncoding = Encoding.UTF8;  
82                    byte[] buffer = System.Text.Encoding.UTF8.GetBytes(Newtonsoft.Json.JsonConvert.SerializeObject(new {success="true",msg="提交成功" }));  
83                    request.Response.ContentLength64 = buffer.Length;  
84                    var output = request.Response.OutputStream;  
85                    output.Write(buffer, 0, buffer.Length);  
86                    output.Close();  
87                }));  
88                threadsub.Start(requestContext);  
89            }  
90        }

HttpListener  類一定要在程序結束時手動結束掉（有時調試時，明明程序已經停止，但是監聽事件卻在后台默默運行），建議把監聽事件寫在一個線程中，這樣的話假如線程停掉，里面的監聽事件也就停掉了。

特別注意，因為是新手，我就自以為需要把IIS網站開啟才能監聽，但是在調試的時候卻一直報”占用”錯誤，后來才慢慢試明白！

另外，因為這次是做微信域名的驗證，在微信請求時給微信相應的回復，剛開始就返回一個  true  可是微信說不行，后來整明白啦，原來需要回復的是微信綁定域名時的TXT文檔中內容！ 

這個大坑用了兩天終於過去了

使用谷歌請求插件進行post請求 PostMan

轉自：http://blog.csdn.net/heyangyi_19940703/article/details/51743167

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