用nodejs做一个svn密码修改页面

　　linux上配置好svn服务后，管理修改密码还得去手工修改passwd这个文件，略麻烦，其实网上应该有配套的web管理修改界面程序。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。

var http = require("http");
var fs = require('fs');
var url = require('url');
var query = require('querystring');

var PASSWD_FILE = "/home/svn/conf/passwd";

http.createServer(function(request, reponse) {
    var params = url.parse(request.url);
    var obj = query.parse(params.query);
    var tm = new Date();
    try {
        console.log(tm.toLocaleString());
        console.log(obj);
        reponse.writeHead(200, {"Content-Type": "text/html"});
        if(params.pathname == '/change') {
            changePassword(obj.name.trim(), obj.password.trim(), obj.npassword.trim(), reponse);
        
        } else {
        fs.readFile("./main.html", "utf-8", function(err, data) {
            reponse.write(data);
            reponse.end();
        });
        }
    } catch(err) {
            console.log(err);
    }
}).listen(8000);

function changePassword(name, password, npassword, reponse) {
    var change = false;
    fs.readFile(PASSWD_FILE, "utf-8", function(error, data) {
        arr = data.split('
');
        for (var i = 0 ;i < arr.length; ++i) {
            if(arr[i].indexOf("#") == -1 && arr[i].indexOf("[users]") == -1) {
                ap=arr[i].split("=");
                if(ap.length != 2) {
                    continue;
                }
                var account = ap[0].trim();
                var passwd = ap[1].trim()
                if(name == account && password == passwd && npassword.length >= 3) {
                    change = true;
                    arr[i] = "";
                    console.log("change account "+account + " password " + npassword);
                    arr[i] = account + "=" + npassword;
                }
            } 
        }

        var outdata = "";
        for (var i = 0; i < arr.length; i++) {
            if(arr[i].replace(/(^s*)|(s*$)/g, "").length ==0) {
                continue;
            }
            outdata += (arr[i] + '
');
        };

        fs.writeFile(PASSWD_FILE, outdata ,"utf-8", function(error) {
            if(error || change == false) {
                fs.readFile("./error.html", "utf-8", function(err, data) {
                reponse.write(data);
                reponse.end();
                });
            } else {
                fs.readFile("./success.html", "utf-8", function(err, data) {
                reponse.write(data);
                reponse.end();
                });
            }
        });
    });
}

 

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。