解析JSON数组nodejs

Question

所以我一般都在学习NodeJS和javascript,并且玩弄它并且我在解析JSON时遇到了一些问题.我从"用户"收到以下内容:

{
  "sync_contact_list": [
    {
      "name": "c",
      "number": "789",
      "email": ""
    },
    {
      "name": "b",
      "number": "123",
      "email": "a@a.com"
    },
    {
      "name": "a",
      "number": "416",
      "email": ""
    }
  ]
}

我的问题是我如何正确地解析这个以得到各个位:

{
  "name": "a",
  "number": "416",
  "email": ""
}

我一直在尝试做var jsonObject = JSON.parse(req.body); 但是我不断解析错误,无论我如何改变我收到的JSON(单个组件,所有组件等).

任何人都可以指出我做错了什么吗？

编辑:所以我使用快递来处理不同的路径.所以我有app.js:

var express = require('express')
  , routes = require('./routes')
//var mysql = require('mysql');
var app = module.exports = express.createServer();

// Configuration

app.configure(function(){
  app.set('views', __dirname + '/views');
  //app.set('view engine', 'jade');
  app.use(express.bodyParser());
  app.use(express.methodOverride());
  app.use(app.router);
  app.use(express.static(__dirname + '/public'));
});

app.configure('development', function(){
  app.use(express.errorHandler({ dumpExceptions: true, showStack: true })); 
});

app.configure('production', function(){
  app.use(express.errorHandler());  
});

// Routes

//app.post('/', routes.syncServiceIndex);

app.post('/syncService', routes.synchServicePost);
app.get('/syncService/:syncServiceUser/sync', routes.synchServiceSync);
app.post('/syncService/:syncServiceUser/push', routes.synchServicePush);
app.del('/syncService/:syncServiceUser', routes.synchServiceDel);

app.post('/syncService/:syncServiceUser/contacts/push', routes.synchServiceContactsPush);
app.get('/syncService/:syncServiceUser/contacts/sync', routes.synchServiceContactsSync);

app.post('/syncService/:syncServiceUser/contacts/', routes.synchServiceContactsPost);
app.get('/syncService/:syncServiceUser/contacts/:contactId', routes.synchServiceContactsGet);
app.put('/syncService/:syncServiceUser/contacts/:contactId', routes.synchServiceContactsPut);
app.del('/syncService/:syncServiceUser/contacts/:contactId', routes.synchServiceContactsDel);


app.listen(3000);


console.log("Express server listening on port %d in %s mode", app.address().port, app.settings.env);

然后我有index.js,其中每条路线基本上都有以下内容.

exports.synchServicePost = function(req, res) {
    console.log('synchServicePost');
    console.log("BODY:"+JSON.stringify(req.body));
    var jsonObject = JSON.parse(req.body);


    res.statusCode = 200;
    res.send("OK\n");
}

该请求使用无线JSON:

curl -i -d "{'sync_contact_list':[{'name':'c','number':'789','email':''},{'name':'b','number':'123','email':'a@a.com'},{'name':'a','number':'416','email':''}]}"  http://localhost:3000/syncService

编辑:我意识到我应该将内容类型更改为application/json.在这种情况下,对于JSON.stringify,我得到以下内容:

SyntaxError: Unexpected token ILLEGAL
at parse (native)
at IncomingMessage.<anonymous> (/home/alex/peekcode/quipmail/synch/node_modules/express/node_modules/connect/lib/middleware/bodyParser.js:71:15)
at IncomingMessage.emit (events.js:61:17)
at HTTPParser.onMessageComplete (http.js:133:23)
at Socket.ondata (http.js:1029:22)
at Socket._onReadable (net.js:677:27)
at IOWatcher.onReadable [as callback] (net.js:177:10)

Answer 1

也许已经解析了？我不知道(我没看到你的整个代码).

如果是(或者你将按照你需要的方式解析它),那么特定的"位"将是可用的(请参阅此jsfiddle以获得证明):

for (var i=0; i<jsonObject['sync_contact_list'].length; i++){
    // here jsonObject['sync_contact_list'][i] is your current "bit"
}

在循环内,迭代jsonObject['sync_contact_list'][i]之间,"位"之间的变化,因为i更改并指向第一个元素,然后指向第二个,依此类推,直到最后一个元素.