2016-11-07 39 views
0

我想用node.js,html和js創建一個註冊頁面。我的登錄命令有效,但我試圖複製和修改相同的代碼,但不能註冊。它在瀏覽器中顯示一個類型錯誤。服務器工作正常。我試圖用curl發送一個命令,它也能正常工作。JS中的POST請求沒有正確讀取JSON字符串值

curl -XPOST -H 'Content_Type: application/json' --data '{"username":"rkmenon235","password":"rkm235"}' http://eorlundgraymane.imad.hasura-app.io/create-user 

我得到當我使用網頁發佈的錯誤是這樣

TypeError: Not a buffer 
    at TypeError (native) 
    at pbkdf2 (crypto.js:562:20) 
    at Object.exports.pbkdf2Sync (crypto.js:553:10) 
    at hash (/home/rkm/Desktop/webapp/imad-2016-app/server.js:22:22) 
    at /home/rkm/Desktop/webapp/imad-2016-app/server.js:62:17 
    at Layer.handle [as handle_request] (/home/rkm/Desktop/webapp/imad-2016-app/node_modules/express/lib/router/layer.js:95:5) 
    at next (/home/rkm/Desktop/webapp/imad-2016-app/node_modules/express/lib/router/route.js:131:13) 
    at Route.dispatch (/home/rkm/Desktop/webapp/imad-2016-app/node_modules/express/lib/router/route.js:112:3) 
    at Layer.handle [as handle_request] (/home/rkm/Desktop/webapp/imad-2016-app/node_modules/express/lib/router/layer.js:95:5) 
    at /home/rkm/Desktop/webapp/imad-2016-app/node_modules/express/lib/router/index.js:277:22 

這是我的Javascript代碼(main.js)我用於註冊命令。

var regy = document.getElementById('signupbutton'); 
regy.onclick = function(){ 
    var request = new XMLHttpRequest(); 
    request.onreadystatechange = function(){ 
     if(request.readyState === XMLHttpRequest.DONE){ 
      if(request.status === 200) 
       { 
        console.log("user created"); 
        alert("Creates Account successfully");  
       } 
      else if(request.status === 403){ 
       alert('Something is 404'); 
      } 
      else if(request.status === 500){ 
       alert('Something is wrong on the server 500'); 
      } 
     } 
    }; 
var username = document.getElementById('username').value; 
var password = document.getElementById('password').value; 
console.log(username); 
console.log(password); 
request.open('POST','http://localhost:8080/create-user',true); 
request.setRequestHeader('Content-Type', 'application/json'); 
request.send(JSON.stringify({username:username,password:password})); 
}; 

這是我的服務器代碼(server.js),這是爲了響應POST請求

我有這個在我的服務器代碼頂級

var express = require('express'); 
var morgan = require('morgan'); 
var path = require('path'); 
var Pool = require('pg').Pool;//Postgres connetion pool 
var crypto = require('crypto'); 
var bodyParser = require('body-parser'); 

var app = express(); 
app.use(morgan('combined')); 
app.use(bodyParser.json()); 

然後,我有這樣的具體要求處理程序(server.js的還一部分)

app.post('/create-user',function(req,res){ 

    var username = req.body.username; 
    var password = req.body.password; 
    var salt = crypto.randomBytes(128).toString('hex'); 
    var dbString = hash(password,salt); 
    pool.query('INSERT INTO users (username,passwordhash) VALUES ($1,$2)',[username,dbString],function(err,result){ 
      if(err){ 
      res.status(500).send(err.toString()); 
     } 
     else 
      { 
        res.send('User Successfully created !'+username); 
      } 
    }); 
}); 

這是HTML代碼

<html> 
    <link href = "/loginstyle.css" rel="stylesheet"> 
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script> 
    <script type = "text/javascript" src = "/scripts/coderider"></script> 
    <body id = "bodyback"> 
     <div id = "container"> 
     <div id = "loginpane"> 
      <form action = "/create-user" method = "POST"> 
      <input type = "text" name = "username" id = "username" placeholder = "Username"/><br> 
      <input type = "password" name = "password" id = "password" placeholder = "Password"/> 
      <br> 
      <input type = "submit" id = "signupbutton" name = "signupbutton" value = "Sign Up"/> 
      <br> 
      </form> 
     </div> 
     </div> 
    </body> 
</html> 
    <script type = "text/javascript" src = "/main.js"></script> 

我重複代碼工作正常從終端使用CURL但我不能註冊使用JavaScript從HTML頁面的POST調用。

感謝您提供任何幫助。

+0

您的'username'和'password'是否正確地傳遞爲'string'值? –

+0

我編輯了我的問題,在main.js代碼後面顯示server.js配置代碼 – CodeRider

+0

使用insert語句註冊(或)時發生此錯誤嗎? –

回答

0

我認爲你有問題與跨域請求。 嘗試頭添加到您的Node.js

res.header("Access-Control-Allow-Origin", "*"); 
res.header("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept, Authorization"); 
+0

不過仍然是相同的錯誤,但感謝您的幫助 – CodeRider

0

的問題是,我給了腳本鏈接都登錄並提交頁面相同的文件。文本元素是在同一個腳本中創建的,但是有兩個不同的文件。這不是一個有保證的任務,因爲元素不會準備好使用document.getElementbyId()來調用;

因此,我爲每個頁面創建了一個單獨的腳本並調用了文檔元素。這次我使用console.lo進行測試以進行調試,並且它像一個魅力一樣工作

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