假如www.olcms.com/getUserInfo获取用户信息,你怎么知道当前用户是谁?有人说登陆时候我把他UID写入session了,如果是API接口,没有session怎么办,那么就需要把UID带到参数里面,如果直接带里面,安全怎么办?所以我们需要加密成别人看不懂的字符串,这就是JWT(JSON WEB TOKEN),你可以把它理解为微信SDK中的access token(其实本身就是一样的东西).JWT加密和解密你自己写也行,不过没有必要重复造轮子,我们在github上搜一下jwt,我搜到一个lcobucci/jwt,看起来用的人也挺多,好,下来我们大概用tp来演示下
下载tp3.2.3
安装lcobucci/jwt
新建composer.json
{
"name": "olcms jwt demo",
"description": "just a jwt demo with tp",
"type": "demo",
"keywords": ["jwt","tp"],
"homepage": "https://www.olcms.com/",
"license": "Apache2",
"authors": [
{
"name": "olcms",
"email": "[email protected]"
}
],
"require": {
"lcobucci/jwt" : "*"
}
}composer update composer安装看 https://www.olcms.com/2015
打开index.php,在载入tp前载入comoposer的自动加载
//composer
require 'vendor/autoload.php';
// 引入ThinkPHP入口文件
require './ThinkPHP/ThinkPHP.php';生成和使用jwt
IndexController.class.php
namespace Home\Controller;
use Think\Controller;
use Lcobucci\JWT\Builder;
class IndexController extends Controller {
public function index(){
$token = (new Builder())
->set('uid', 1) // Configures a new claim, called "uid"
->getToken(); // Retrieves the generated token
echo $token; // The string representation of the object is a JWT string (pretty easy, right?)
}
}浏览器访问,我们看到生成的jwteyJ0eXAiOiJKV1QiLCJhbGciOiJub25lIn0.eyJ1aWQiOjF9.刷新一下,发现什么?没变,恩，不够安全，我们再修改下代码
namespace Home\Controller;
use Think\Controller;
use Lcobucci\JWT\Builder;
use Lcobucci\JWT\Signer\Hmac\Sha256;
class IndexController extends Controller {
public function index(){
$signer = new Sha256();
$token = (new Builder())
->set('uid', 1) // Configures a new claim, called "uid"
->setExpiration(time() + 3600)
->sign($signer, 'olcms') // creates a signature using "testing" as key
->getToken(); // Retrieves the generated token
echo $token; // The string representation of the object is a JWT string (pretty easy, right?)
}
}生成的jwteyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJ1aWQiOjEsImV4cCI6MTQ2MDYwNjk0Mn0.GdbEXStqQR-5zofQVmorrB4U3yuyCYDdX-jFu58dPpY每次刷新也变- -
从jwt中获取信息
namespace Home\Controller;
use Think\Controller;
use Lcobucci\JWT\Builder;
use Lcobucci\JWT\Signer\Hmac\Sha256;
use Lcobucci\JWT\Parser;
class IndexController extends Controller {
public function index(){
$signer = new Sha256();
$token = (new Builder())
->set('uid', 1) // Configures a new claim, called "uid"
->setExpiration(time() + 3600)
->sign($signer, 'olcms') // creates a signature using "testing" as key
->getToken(); // Retrieves the generated token
echo $token; // The string representation of the object is a JWT string (pretty easy, right?)
//从jwt获取信息
$token = (new Parser())->parse((string) $token); // Parses from a string
echo $token->getClaim('uid'); // will print "1"
}
}