用nodejs做一个svn密码修改页面

　　linux上配置好svn后，管理修改密码还得去手工修改passwd这个文件，太麻烦，其实网上应该有配套的web管理修改界面。但我想自己用nodejs写一个，因为用node不用配置复杂的服务器。

　　弄这种基于事件模型的语言，一定要小心，整个过程可能不是线性的。

 1 var http = require("http");
 2 var fs = require(‘fs‘);
 3 var url = require(‘url‘);
 4 var query = require(‘querystring‘);
 5
 6 var PASSWD_FILE = "/home/svn/conf/passwd";
 7
 8 http.createServer(function(request, reponse) {
 9     var params = url.parse(request.url);
10     var obj = query.parse(params.query);
11     var tm = new Date();
12     try {
13         console.log(tm.toLocaleString());
14         console.log(obj);
15         reponse.writeHead(200, {"Content-Type": "text/html"});
16         if(params.pathname == ‘/change‘) {
17             changePassword(obj.name.trim(), obj.password.trim(), obj.npassword.trim(), reponse);
18
19         } else {
20         fs.readFile("./main.html", "utf-8", function(err, data) {
21             reponse.write(data);
22             reponse.end();
23         });
24         }
25     } catch(err) {
26             console.log(err);
27     }
28 }).listen(8000);
29
30 function changePassword(name, password, npassword, reponse) {
31     var change = false;
32     fs.readFile(PASSWD_FILE, "utf-8", function(error, data) {
33         arr = data.split(‘\n‘);
34         for (var i = 0 ;i < arr.length; ++i) {
35             if(arr[i].indexOf("#") == -1 && arr[i].indexOf("[users]") == -1) {
36                 ap=arr[i].split("=");
37                 if(ap.length != 2) {
38                     continue;
39                 }
40                 var account = ap[0].trim();
41                 var passwd = ap[1].trim()
42                 if(name == account && password == passwd && npassword.length >= 3) {
43                     change = true;
44                     arr[i] = "";
45                     console.log("change account "+account + " password " + npassword);
46                     arr[i] = account + "=" + npassword;
47                 }
48             }
49         }
50
51         var outdata = "";
52         for (var i = 0; i < arr.length; i++) {
53             if(arr[i].replace(/(^s*)|(s*$)/g, "").length ==0) {
54                 continue;
55             }
56             outdata += (arr[i] + ‘\n‘);
57         };
58
59         fs.writeFile(PASSWD_FILE, outdata ,"utf-8", function(error) {
60             if(error || change == false) {
61                 fs.readFile("./error.html", "utf-8", function(err, data) {
62                 reponse.write(data);
63                 reponse.end();
64                 });
65             } else {
66                 fs.readFile("./success.html", "utf-8", function(err, data) {
67                 reponse.write(data);
68                 reponse.end();
69                 });
70             }
71         });
72     });
73 }

启动脚本命令：nohup node main.js > node.log &

nohup & 启动程序并后台执行，不会使程序跟着控制台的死掉而死掉;> node.log把控制台的日志重定向到node.log中去。