【C#】纯托管实现一个Git服务端
有传闻说，这年头不用Git就不是个程序员。传闻归传闻，近些年来Git的发展是如火如荼。除了一些公共的Git平台外，大多的Git服务端都是在Linux上的，Windows的可选方案实在甚少。作为一个.Net码农，当然希望能有个纯托管代码的Git服务端。经过一晚上的学习，用纯托管代码写了个Git服务端供大家参考。学习资料：暂无。
接下来开始码代码。首先加入引用：GitSharp.Core，GitSharp。可以从git://github.com/henon/GitSharp.git获取。然后，
1:using GitSharp.Core.Transport;
2:using System;
3:using System.IO;
4:using System.Net;
5:using System.Text;
6:using System.Text.RegularExpressions;
7:
8:namespace SampleGitServer
9:{
10: >
11: {
12: const string PREFIX = @"http://localhost:2034/";
13: const string REPOSITORY_PATH = @"F:\Repositories\git-debug-ONLY";
14:
15: readonly static Regex GetInfoRefsRegex = new Regex(PREFIX + @"\w{3,10}/info/refs\?service=.*");
16: readonly static Regex GitUploadPackRegex = new Regex(PREFIX + @"\w{3,10}/git-upload-pack");
17: readonly static Regex GitRecivePackRegex = new Regex(PREFIX + @"\w{3,10}/git-receive-pack");
18:
19: static void Main(string[] args)
20: {
21: var listener = new HttpListener();
22: listener.Prefixes.Add(PREFIX);
23:
24: Console.WriteLine("Listening: " + PREFIX);
25: listener.Start();
26:
27: while (true)
28: {
29: var context = listener.GetContext();
30: var url = context.Request.Url.ToString();
31:
32: Console.WriteLine(url);
33:
34: if (GetInfoRefsRegex.Match(url).Success)
35: GetInfoRefs(context);
36: else if (GitUploadPackRegex.Match(url).Success)
37: GitUploadPack(context);
38: else if (GitRecivePackRegex.Match(url).Success)
39: GitRecivePack(context);
40: }
41: }
42:
43: private static void GetInfoRefs(HttpListenerContext context)
44: {
45: var Request = context.Request;
46: var Response = context.Response;
47: var project = Request.Url.PathAndQuery.Split('/');
48: var service = Request.QueryString["service"];
49:
50: var directory = GetDirectoryInfo(project);
51: if (GitSharp.Repository.IsValid(directory.FullName, true))
52: {
53: Response.StatusCode = 200;
54: Response.ContentType = String.Format("application/x-{0}-advertisement", service);
55: SetNoCache(Response);
56:
57: var sb = new StringBuilder();
58: sb.Append(FormatMessage(String.Format("# service={0}\n", service)));
59: sb.Append(FlushMessage());
60: var bytes = Encoding.ASCII.GetBytes(sb.ToString());
61: Response.OutputStream.Write(bytes, 0, bytes.Length);
62:
63: using (var repository = new GitSharp.Repository(directory.FullName))
64: {
65: if (String.Equals("git-receive-pack", service, StringComparison.InvariantCultureIgnoreCase))
66: {
67: using (var pack = new ReceivePack(repository))
68: {
69: pack.SendAdvertisedRefs(new RefAdvertiser.PacketLineOutRefAdvertiser(new PacketLineOut(Response.OutputStream)));
70: }
71:
72: }
73: else if (String.Equals("git-upload-pack", service, StringComparison.InvariantCultureIgnoreCase))
74: {
75: using (var pack = new UploadPack(repository))
76: {
77: pack.SendAdvertisedRefs(new RefAdvertiser.PacketLineOutRefAdvertiser(new PacketLineOut(Response.OutputStream)));
78: }
79: }
80: }
81: }
82: else
83: {
84: Response.StatusCode = 404;
85: }
86: Response.Close();
87: }
88:
89: private static void GitUploadPack(HttpListenerContext context)
90: {
91: var Request = context.Request;
92: var Response = context.Response;
93: var project = Request.Url.PathAndQuery.Split('/');
94:
95: Response.ContentType = "application/x-git-upload-pack-result";
96: SetNoCache(Response);
97:
98: var directory = GetDirectoryInfo(project);
99: if (GitSharp.Repository.IsValid(directory.FullName, true))
100: {
101: using (var repository = new GitSharp.Repository(directory.FullName))
102: using (var pack = new UploadPack(repository))
103: {
104: pack.setBiDirectionalPipe(false);
105: pack.Upload(Request.InputStream, Response.OutputStream, Response.OutputStream);
106: }
107: }
108: else
109: {
110: Response.StatusCode = 404;
111: }
112: Response.Close();
113: }
114:
115: private static void GitRecivePack(HttpListenerContext context)
116: {
117: var Request = context.Request;
118: var Response = context.Response;
119: var project = Request.Url.PathAndQuery.Split('/');
120:
121: Response.ContentType = "application/x-git-receive-pack-result";
122: SetNoCache(Response);
123:
124: var directory = GetDirectoryInfo(project);
125: if (GitSharp.Repository.IsValid(directory.FullName, true))
126: {
127: using (var repository = new GitSharp.Repository(directory.FullName))
128: using (var pack = new ReceivePack(repository))
129: {
130: pack.setBiDirectionalPipe(false);
131: pack.receive(Request.InputStream, Response.OutputStream, Response.OutputStream);
132: }
133: }
134: else
135: {
136: Response.StatusCode = 404;
137: }
138: Response.Close();
139: }
140:
141: private static String FormatMessage(String input)
142: {
143: return (input.Length + 4).ToString("X").PadLeft(4, '0') + input;
144: }
145:
146: private static String FlushMessage()
147: {
148: return "0000";
149: }
150:
151: private static DirectoryInfo GetDirectoryInfo(String project)
152: {
153: return new DirectoryInfo(Path.Combine(REPOSITORY_PATH, project));
154: }
155:
156: private static void SetNoCache(HttpListenerResponse Response)
157: {
158: Response.AddHeader("Expires", "Fri, 01 Jan 1980 00:00:00 GMT");
159: Response.AddHeader("Pragma", "no-cache");
160: Response.AddHeader("Cache-Control", "no-cache, max-age=0, must-revalidate");
161: }
162: }
163:}
好吧，你看完代码会有一种上当的感觉。我必须承认我只是实现了服务端的接口而已。PS，我不会告诉你这点代码都是抄来的。
重点是，所有的代码都是托管代码。
.Net 托管实现的Git平台可以选择使用Git Candy了，功能比Bonobo更强大，速度更快、更稳定！
欢迎你的使用！
源码在：http://github.com/Aimeast/GitCandy
演示在：http://gitcandy.com
Bonobo到GitCandy数据库转换程序：http://gitcandy.com/Repository/Tree/Bonobo2Candy/
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