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javascript - AngularJS的http服务总是返回错误

转载 作者：行者123 更新时间：2023-11-29 20:11:28 24 4
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我想知道为什么我的 AngularJS http 服务总是返回状态为 -1 的错误。

我有 PHP 代码并将其作为 localhost/ajax.php 运行。该文件可以从数据库中检索数据。所以php工作正常。检索到的数据如下:

[{"id":"1","Name":"Mark","Gender":"Male","City":"London"},  
{"id":"2","Name":"John","Gender":"Male","City":"Chenni"},
{"id":"3","Name":"Hint","Gender":"Male","City":"Singapore"},    
{"id":"4","Name":"Sara","Gender":"Female","City":"Sydney"},   
{"id":"5","Name":"Tom","Gender":"Male","City":"New York"},   
{"id":"6","Name":"Pam","Gender":"Male","City":"Los Angeles"},  
{"id":"7","Name":"Catherine","Gender":"Female","City":"Chicago"},  
{"id":"8","Name":"Mary","Gender":"Femal","City":"Houston"},  
{"id":"9","Name":"Mike","Gender":"Male","City":"Phoenix"},  
{"id":"10","Name":"Rosie","Gender":"Female","City":"Manchestor"},  
{"id":"11","Name":"Lim","Gender":"Male","City":"Singapore"},  
{"id":"12","Name":"Tony","Gender":"Male","City":"Hong Kong"},  
{"id":"13","Name":"Royce","Gender":"Male","City":"London"},  
{"id":"14","Name":"Hitler","Gender":"Male","City":"Germany"},  
{"id":"15","Name":"Tommy","Gender":"Male","City":"New Jersy"}]

此 PHP 文件是从我的 AngularJS http 服务调用的，但该调用始终返回状态为 -1 的错误。

我查看了所有资源，但没有任何线索。我的数据库是使用 Sql 在本地主机设置的。

我的疑问是可能出现的错误。我认为这些使 http 服务返回错误状态 -1。

我的代码如下:

Ajax.php

<?php
    require 'connect.php';

    $connect = connect();

    // Get the data
    $students = array();
    $sql = "SELECT id, Name, Gender, City  FROM tblStudents";

    if($result = mysqli_query($connect,$sql))
    {

      $count = mysqli_num_rows($result);
      $cr = 0;
      while($row = mysqli_fetch_assoc($result))
      {
          $students[$cr]['id']    = $row['id'];
          $students[$cr]['Name']  = $row['Name'];
          $students[$cr]['Gender'] = $row['Gender'];
          $students[$cr]['City'] = $row['City'];         
          $cr++;          
      }
    }

    $json = json_encode($students);
    echo $json;
    exit;

?>

连接.php

<?php
    // db credentials
    define('DB_HOST', 'localhost');
    define('DB_USER','root');
    define('DB_PASS','nyan');
    define('DB_NAME','Students');

    // Connect with the database.
    function connect()
    {
      $connect = mysqli_connect(DB_HOST ,DB_USER ,DB_PASS ,DB_NAME);

      if (mysqli_connect_errno($connect))
      {
        die("Failed to connect:" . mysqli_connect_error());
      }

      mysqli_set_charset($connect, "utf8");


      return $connect;
    }


?>

脚本.js

var app = angular.module("Demo", ["ngRoute"])
                 .config(function($routeProvider){
                 $routeProvider
                 .when("/home", {
                     templateUrl:"Templates/home.html",
                     controller:"homeController"
                 })
                 .when("/courses", {
                     templateUrl:"Templates/courses.html",
                     controller:"coursesController"
                 })
                 .when("/students", {
                     templateUrl:"Templates/students.html",
                     controller:"studentsController"
                 })
            })            
            .controller("homeController", function($scope){
                 $scope.message = "Home Page";
            })
            .controller("coursesController", function($scope){
                 $scope.courses = ["C#", "VB.NET", "SQL Server", "ASP.NET"];
            })
            .controller("studentsController", function ($scope, $http) {
                 $scope.students;
                 $http({                    
                    method: 'GET',
                    url: 'api/ajax.php'
                 }).then(function (response) {
                    $scope.students = response.data;
                 }, function (response) {  
                    console.log(response.data,response.status);
                 });                 
            });

index.html

<!DOCTYPE html>
<!--
To change this license header, choose License Headers in Project Properties.
To change this template file, choose Tools | Templates
and open the template in the editor.
-->
<html ng-app="Demo">
    <head>
        <title>TODO supply a title</title>
        <meta charset="UTF-8">
        <meta name="viewport" content="width=device-width, initial-scale=1.0">
        <script src="Scripts/angular.min.js" type="text/javascript"></script>
        <script src="Scripts/angular-route.min.js" type="text/javascript"></script>
        <script src="Scripts/Script.js" type="text/javascript"></script>
        <link href="Styles.css" rel="stylesheet" type="text/css"/>        
    </head>
    <body >         
         <table style="font-family: Arial">
            <tr>
                <td colspan="2" class="header">
                    <h1>
                        WebSite Header
                    </h1>
                </td>
            </tr>
            <tr ng-controller="studentsController">
                <td class="leftMenu">
                    <a href="#/home">Home</a>
                    <a href="#/courses">Courses</a>
                    <a href="#/students">Students</a>
                </td>
                <td class="mainContent">
                     <ng-view></ng-view>                    
                </td>
            </tr>
            <tr>
                <td colspan="2" class="footer">
                    <b>Website Footer</b>
                </td>
            </tr>
        </table>
    </body>
</html>

最佳答案

您在问题中指出您的脚本可能由于数据库查询而中断。

当您的查询花费很长时间时，可能会导致超时。响应代码 -1 通常意味着请求被中止，例如根据 Angular js 文档 https://docs.angularjs.org/api/ng/service/ 使用 config.timeout $http。

您可以尝试增加超时时间:

$http.get('ajax.php', {timeout: 5000, method: 'GET'});

在此示例中，它将设置为 5 秒。测试您的 ajax.php 以查看您的请求需要多长时间。

编辑:

还要确保您使用正确的 URL。在您的问题中，您使用不同的 URL 来测试 ajax 调用。

关于javascript - AngularJS的http服务总是返回错误，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/40080518/

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