Merge pull request #110 from fengyhack/master

新增"时间戳防盗链"，部分优化与改进

Author: fengyhack

Qiniu/Fusion/FusionManager.cs

@@ -1,4 +1,5 @@
 using System;
+using System.Security.Cryptography;
 using System.Collections.Generic;
 using System.Linq;
 using System.Text;
@@ -7,6 +8,7 @@
 using System.Net;
 using Qiniu.Http;
 using Newtonsoft.Json;
+using System.Text.RegularExpressions;
 
 namespace Qiniu.Fusion
 {
@@ -206,5 +208,23 @@ public LogListResult LogList(LogListRequest request)
 
             return result;
         }
+
+        /// <summary>
+        /// 时间戳防盗链
+        /// </summary>
+        /// <param name="request"></param>
+        /// <returns></returns>
+        public string HotLink(HotLinkRequest request)
+        {
+            string RAW = request.RawUrl;
+
+            string key = request.Key;
+            string path = Uri.EscapeUriString(request.Path);
+            string file = request.File;
+            string ts = (int.Parse(request.Timestamp)).ToString("x");
+            string SIGN = StringUtils.md5Hash(key + path + file + ts);            
+
+            return string.Format("{0}&sign={1}&t={2}", RAW, SIGN, ts);
+        }        
     }
 }

Qiniu/Fusion/Model/HotLinkRequest.cs

@@ -0,0 +1,72 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using Qiniu.Util;
+
+namespace Qiniu.Fusion.Model
+{
+    public class HotLinkRequest
+    {
+        public string RawUrl
+        {
+            get
+            {
+                return Host + Path + File + Query;
+            }
+        }
+
+        public string Host { get; set; }
+
+        public string Path { get; set; }
+
+        public string File { get; set; }
+
+        public string Query { get; set; }
+
+        public string Key { get; set; }
+
+        public string Timestamp { get; set; }
+
+        public HotLinkRequest()
+        {
+            Host = "";
+            Path = "";
+            File = "";
+            Query = "";
+            Key = "";
+            Timestamp = "";
+        }
+
+        public HotLinkRequest(string url, string key, int expire)
+        {
+            string host, path, file, query;
+            UrlHelper.UrlSplit(url, out host, out path, out file, out query);
+
+            Host = host;
+            Path = path;
+            File = file;
+            Query = query;
+            Key = key;
+
+            SetLinkExpire(expire);
+        }
+
+        public void SetLinkExpire(int seconds)
+        {
+            DateTime dt0 = TimeZone.CurrentTimeZone.ToLocalTime(new DateTime(1970, 1, 1));
+            DateTime dt1 = DateTime.Now.AddSeconds(seconds);
+            TimeSpan tsx = dt1.Subtract(dt0);
+            string sts = tsx.Ticks.ToString();
+            Timestamp = sts.Substring(0, sts.Length - 7);
+        }
+
+        public void SetLinkExpire(DateTime stopAt)
+        {
+            DateTime dt0 = TimeZone.CurrentTimeZone.ToLocalTime(new DateTime(1970, 1, 1));
+            TimeSpan tsx = stopAt.Subtract(dt0);
+            string sts = tsx.Ticks.ToString();
+            Timestamp = sts.Substring(0, sts.Length - 7);
+        }
+    }
+}

Qiniu/Fusion/Model/UrlHelper.cs

@@ -31,5 +31,26 @@ public static string GetNormalUrl(string _url)
             return m.Value;
         }
 
+        public static void UrlSplit(string url, out string host, out string path, out string file, out string query)
+        {
+            int start = 0;
+
+            Regex regHost = new Regex(@"(http|https):\/\/[\w\-_]+(\.[\w\-_]+)+");
+            host = regHost.Match(url, start).Value;
+            start += host.Length;
+
+            Regex regPath = new Regex(@"(/(\w|\-)*)+/");
+            path = regPath.Match(url, start).Value;
+            if(string.IsNullOrEmpty(path))
+            {
+                path = "/";
+            }
+            start += path.Length;
+
+            int index = url.IndexOf('?', start);
+            file = url.Substring(start, index - start);
+
+            query = url.Substring(index);
+        }
     }
 }

Qiniu/Http/CompletionHandler.cs

@@ -7,4 +7,12 @@ namespace Qiniu.Http
     /// <param name="respInfo">请求回复信息</param>
     /// <param name="response">请求回复内容</param>
     public delegate void CompletionHandler(ResponseInfo respInfo, string response);
+
+    /// <summary>
+    /// HTTP请求结果(非json/二进制数据)
+    /// </summary>
+    /// <param name="respInfo"></param>
+    /// <param name="respData"></param>
+    public delegate void RecvDataHandler(ResponseInfo respInfo, byte[] respData);
+
 }