Laravel API跨域访问的实现步骤

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服务器a请求服务器b的接口，那么一般会出现跨域问题。

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xmlhttprequest cannot load http://api.console.vms3.com/api/ur. no 'access-control-allow-origin' header is prent on the requested resource. origin 'ht角度的换算tp://localhost:8080' istherefore not allowed access.

意思就是服务器响应不允许跨域访问.

那我们就需要让服务器支持跨域访问, 也就是在响应头部中添加

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'access-control-allow-origin: *'

第一步: 创建中间件

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创建 `app/http/middleware/accesscontrolalloworigin.php` middleware 把 'access-control-allow-origin: *' 写入头部.

app/http/middleware/成都专科学校排名accesscontrolalloworigin.php

<?php

namespace app\http\middleware;

u closure;

u illuminate\support\facades\auth;

class accesscontrolalloworigin

{

/**

*

* handle an incoming request.

*

* @param \illuminate\http\request $request

* @param \closure $next

* @return mixed

*/

public function handle($request, closure $next)

{

header('access-control-allow-origin: *');

header("access-control-allow-credentials: true");

header("access-control-allow-methods: *");

header("access-control-allow-headers: content-type,access-token");

header("access-control-expo-headers: *");

return $next($request);

}

}

第二步: 注册路由

注册这个middleware到kernel中.
分别在protected $middleware数组中和protected $routemiddleware数组中
添加我们刚才创建的那个文件class名, 使用cors这个别名.

第三步: 设置中间件保护接口

然后在设置它保护 api , 就是$middlewaregroups['api']的数组中添加它的别名, 本文中是'cors'
app/http/kernel.php

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<?php

namespace app\http;

u illuminate\foundation\http\kernel 4x400米接力as httpkernel;

class kernel extends httpkernel

{

/**

* the application's global http middleware stack.

*

* the middleware are run during every request to your application.

*

* @var array

*/

protected $middleware = [

\illuminate\foundation\http\middleware\checkformaintenancemode::class,

\illuminate\foundation\http\middleware\validatepostsize::class,

\app\http\middleware\trimstrings::class,

\illuminate\foundation\http\middleware\convertemptystringstonull::class,

\app\http\middleware\accesscontrolalloworigin::class,

];

/**

* the application's route middleware groups.

*

* @var array

*/

protected $middlewaregroups = [

'web' => [

\app\http\middleware\encryptcookies::class,

\illuminate\cookie\middleware\addqueuedcookiestorespon::class,

\illuminate\ssion\middleware\startssion::class,

// \illuminate\ssion\middleware\authenticatession::class,

\illuminate\view\middleware\shareerrorsfromssion::class,

\app\http\middleware\verifycsrftoken::class,

\illuminate\routing\middleware\substitutebindings::class,

],

'api' => [

'throttle:60,1',

'bindings',

'cors'

],

];

/**

* the application's route middleware.

*

* the middleware may be assigned to groups or ud inpidually.

*

* @var array

*/

protected $routemiddleware = [

'auth' => \illuminate\auth\middleware\authenticate::class,

'auth.basic' => \illuminate\auth\middleware\authenticatewithbasicauth::class,

'bindings' => \illuminate\routing\middleware\substitutebindings::class,

'can' => \illuminate\auth\middleware\authorize::class,

'guest' => \app\http\middleware\redirectifa活络油uthenticated::class,

'throttle' => \illuminate\routing\middleware\throttlerequests::class,

'cors' => \app\http\middleware\accesscontrolalloworigin::class,

];

}

第四步：在路由中添加路由

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route::middleware('cors')->group(function () {

//

});

以上就是laravel api跨域访问的实现步骤的详细内容。