Laravel 5.0 ajax 请求保存会话变量
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Laravel 5.0 ajax request to save session variable
提问by Logan Hasbrouck
I am attempting to use an ajax request to save a session variable which is used to disable my site's background images. As of right now, it DOES work if I simply go to the route itself, however, if I run the function through an ajax request, it fails completely and does NOT save the value to session even if it shows it in the dd(Session::all())right after.
我正在尝试使用 ajax 请求来保存用于禁用我网站的背景图像的会话变量。截至目前，如果我只是转到路由本身，它确实可以工作，但是，如果我通过 ajax 请求运行该函数，它会完全失败并且不会将值保存到会话，即使它在dd(Session::all())之后显示它。
<?php namespace App\Http\Controllers;
use App\Http\Controllers\Controller;
use Session;
use Request;
use App;
use Response;
class SessionVarController extends Controller {
public function backgroundImgsOff()
{
if(Request::ajax())
{
Session::put(['backgroundImgDisable' => true]);
return Response::json();
}
else
{
App::abort(404, 'Page not found.');
}
}
public function backgroundImgsOn()
{
if(Request::ajax())
{
Session::forget(['backgroundImgDisable']);
return Response::json();
}
else
{
App::abort(404, 'Page not found.');
}
}
}
Does anyone know why this seems to refuse to actually save the session variable? I read somewhere that it may have to do with session states, however, I have been unsuccessful in locating so much as a hint to a solution.
有谁知道为什么这似乎拒绝实际保存会话变量？我在某处读到它可能与会话状态有关，但是，我没有成功找到解决方案的提示。
EDIT: here is my ajax (keep in mind this is my first attempt at ajax).
编辑：这是我的 ajax（请记住，这是我第一次尝试 ajax）。
function enableBackgroundImages() {
if (window.XMLHttpRequest) {
// code for IE7+, Firefox, Chrome, Opera, Safari
xmlhttp = new XMLHttpRequest();
} else {
// code for IE6, IE5
xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
}
xmlhttp.open("GET","{{ action('SessionVarController@backgroundImgsOn') }}",true);
xmlhttp.send();
}
function disableBackgroundImages() {
if (window.XMLHttpRequest) {
// code for IE7+, Firefox, Chrome, Opera, Safari
xmlhttp = new XMLHttpRequest();
} else {
// code for IE6, IE5
xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
}
xmlhttp.open("GET","{{ action('SessionVarController@backgroundImgsOff') }}",true);
xmlhttp.send();
}
Here are the buttons on the page:
以下是页面上的按钮：
<div id="background-on-off" style="display:inline-block;">
Background Images:
<a href="#" onClick="enableBackgroundImages();">
On
</a>
/
<a href="#" onClick="disableBackgroundImages();location.reload();">
Off
</a>
</div>
Lastly, here are my routes:
最后，这里是我的路线：
Route::get('background_images_on', 'SessionVarController@backgroundImgsOn');
Route::get('background_images_off', 'SessionVarController@backgroundImgsOff');
Thanks.
谢谢。
回答by whoacowboy
Your controller code works. It probably has to do with how your routes or your ajax call.
您的控制器代码有效。这可能与您的路由或 ajax 调用方式有关。
routes.php
路由文件
Route::post('background-imgs/disable','SessionVarController@backgroundImgsOff');
Route::post('background-imgs/enable','SessionVarController@backgroundImgsOn');
jQuery
jQuery
$("#on").on('click', function () {
var that = this;
$.ajax({
type: "POST",
url:'/background-imgs/enable'
});
});
$("#off").on('click', function () {
var that = this;
$.ajax({
type: "POST",
url:'/background-imgs/disable'
});
});
You could normalize this a bit if you wanted and return a value so you can see what's happening.
如果您愿意，您可以将其规范化并返回一个值，以便您可以看到发生了什么。
routes.php
路由文件
Route::post('background-imgs/{action}','SessionVarController@backgroundImages')
->where('action', '[enable]*[disable]*');
controller
控制器
class SessionVarController extends Controller {
public function backgroundImages($action = 'enable')
{
if(!Request::ajax())
{
abort(404, 'Page not found.');
}
if ($action === 'enable'){
Session::forget(['backgroundImgDisable']);
return Response::json(['background' => 'enabled']);
}
Session::put(['backgroundImgDisable' => true]);
return Response::json(['background' => 'disabled']);
}
Edit per updated question
编辑每个更新的问题
You need to add the X-Requested-Withheader to your XMLHttpRequest.
您需要将X-Requested-With标题添加到您的XMLHttpRequest.
Laravel uses Symfonyto check if it is an ajax request.
Laravel 使用Symfony来检查它是否是一个 ajax 请求。
public function isXmlHttpRequest()
{
return 'XMLHttpRequest' == $this->headers->get('X-Requested-With');
}
You javascript code should look like this.
你的 javascript 代码应该是这样的。
function enableBackgroundImages() {
if (window.XMLHttpRequest) {
// code for IE7+, Firefox, Chrome, Opera, Safari
xmlhttp = new XMLHttpRequest();
} else {
// code for IE6, IE5
xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
}
xmlhttp.open("GET","{{ action('TestController@backgroundImgsOn') }}",true);
xmlhttp.setRequestHeader('X-Requested-With','XMLHttpRequest');
xmlhttp.send();
}
function disableBackgroundImages() {
if (window.XMLHttpRequest) {
// code for IE7+, Firefox, Chrome, Opera, Safari
xmlhttp = new XMLHttpRequest();
} else {
// code for IE6, IE5
xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
}
xmlhttp.open("GET","{{ action('TestController@backgroundImgsOff') }}",true);
xmlhttp.setRequestHeader('X-Requested-With','XMLHttpRequest');
xmlhttp.send();
}
You might want to look into jQueryfor this. It adds a bit of bulk to your JavaScript but it is much easier to deal with.
您可能想为此研究jQuery。它为您的 JavaScript 增加了一些体积，但它更容易处理。
You could write your methods like this.
你可以这样写你的方法。
function enableBackgroundImages() {
$.get("{{ action('SessionVarController@backgroundImgsOn') }}");
}
function disableBackgroundImages() {
$.get("{{ action('SessionVarController@backgroundImgsOff') }}");
}
回答by Aman Jain
Easiest way in laravel 5.3 use
laravel 5.3 中最简单的使用方法
\Session::put("userid",Input::get('userid'));
\Session::save();
回答by Payal
You need to add following lines to return from ajax call and it will work like magic.
您需要添加以下行以从 ajax 调用返回，它会像魔术一样工作。
$result['status'] = 'success';
return json_encode($result);
exit;
I had the same problem. I used echo json_encode($result);statement and then I replaced it with return json_encode($result);statement and it works like charm.
我有同样的问题。我使用了echo json_encode($result);语句，然后用 returnjson_encode($result);语句替换了它，它的作用就像魅力一样。
