需求：前台登录和后台登录地址不同，都需要使用qq互联登录，且共用一套KEY，如何实现？经过两天的研究，发现qq互联回调地址可以填写多个，这样，原有的前台QQ互联登录无需修改，只需要添加一个回调地址，并用分号分割：
接下来，在配置文件，比如laravel .env文件中，添加一个回调地址QQ_REDIRECT_URI2：
//QQ登录配置 QQ_KEY= QQ_SECRET= QQ_REDIRECT_URI=https://blog.dzbfsj.com/qqlogin QQ_REDIRECT_URI2=https://blog.dzbfsj.com/admin/qqlogin
然后，在后台登录控制器中，以laravel-admin为例，AuthController.php文件添加一个方法，用于qq互联登录：
//QQ一键登录
public function qqlogin(Request $request)
{
header("Content-Type: text/html;charset=utf-8");
$app_id = env('QQ_KEY');
$app_secret = env('QQ_SECRET');
$my_url = env('QQ_REDIRECT_URI2');
//Step1：获取Authorization Code
if (!isset($request->code)){
//state参数用于防止CSRF攻击，成功授权后回调时原样带回
$state = md5(uniqid(rand(), TRUE));
session(['state'=>$state]);
$dialog_url = "https://graph.qq.com/oauth2.0/authorize?response_type=code&client_id=".$app_id."&redirect_uri=".urlencode($my_url)."&state=".$state;
Header("Location: $dialog_url");
}elseif($request->state == session('state')) {
//Step2：通过Authorization Code获取Access Token
$token_url = "https://graph.qq.com/oauth2.0/token?grant_type=authorization_code&"."client_id=".$app_id."&redirect_uri=".urlencode($my_url)."&client_secret=".$app_secret."&code=".$request->code;
$response = file_get_contents($token_url);
//如果用户临时改变主意取消登录，返回true!==false,否则执行step3
if (strpos($response, "callback") !== false) {
$lpos = strpos($response, "(");
$rpos = strrpos($response, ")");
$response = substr($response, $lpos + 1, $rpos - $lpos -1);
$msg = json_decode($response);
if (isset($msg->error)) {
echo "error:
".$msg->error;
echo "msg :
".$msg->error_description;
exit;
}
}
$params = array();
parse_str($response, $params);//把传回来的数据参数变量化
//set access token to session
$token = $params["access_token"];
$graph_url = "https://graph.qq.com/oauth2.0/me?access_token=$token";
$str = file_get_contents($graph_url);
if (strpos($str, "callback") !== false)
{
$lpos = strpos($str, "(");
$rpos = strrpos($str, ")");
$str = substr($str, $lpos + 1, $rpos - $lpos -1);
}
$user = json_decode($str);
if (isset($user->error))
{
echo "error:
" . $user->error;
echo "msg :
" . $user->error_description;
exit;
}
//debug
//echo("Hello " . $user->openid);
$openid = $user->openid;
if($openid){
//查找数据库中是否有该openid
$check = AdminUserModel::where('qqid', $openid)->first();
if (!$check) {//如果第一次访问，跳转到绑定账号页面
$bd = url("/admin/bdyyzh?timestamp=".time()."&qqid=".$openid);
return redirect($bd);
} else {
//登录
$this->guard()->login($check);
admin_toastr(trans('admin.login_successful'));
$request->session()->regenerate();
return redirect()->intended($this->redirectPath());
}
}else{
echo '没有获取到openid';
}
}else{
echo "The state does not match. You may be a victim of CSRF.";
}
}登录流程是，qq互联用户授权，获取到openid，数据库查询是否存在，不存在则跳转到绑定页面，存在则直接登录到后台。
本站使用了三个登录：微信、QQ、短信，因此在绑定账号时，也相应的进行绑定：
//绑定已有账号
public function bdyyzh(Request $request){
if(isset($request->qqid)){
$qqid = $request->qqid;
return view('auth/adminbduser',compact('qqid'));
}elseif(isset($request->openid)){
$openid = $request->openid;
return view('auth/adminbduser',compact('openid'));
}elseif(isset($request->phone)){
$phone = $request->phone;
return view('auth/adminbduser',compact('phone'));
}
//session()->flash('success', 'QQ登录成功！');
//return redirect()->route('cxsy');
}
//查询账号密码，如账号密码正确则更新qqid或openid或phone
public function cxbd(Request $request){
//dd($request->all());
$this->loginValidator($request->all())->validate();
$credentials = $request->only([$this->username(), 'password']);
$remember = $request->get('remember', false);
if ($this->guard()->attempt($credentials, $remember)) {
//验证通过
if(isset($request->qqid)){
$qqid = $request->qqid;
AdminUserModel::where('username', $request->username)->update(['qqid' => $qqid]);
}elseif(isset($request->openid)){
$openid = $request->openid;
AdminUserModel::where('username', $request->username)->update(['openid' => $openid]);
}elseif(isset($request->phone)){
$phone = $request->phone;
AdminUserModel::where('username', $request->username)->update(['phone' => $phone]);
}
//保存session并跳转到后台
return $this->sendLoginResponse($request);
}else{
session()->flash('danger', '很抱歉，您的用户名和密码不匹配！');
return redirect()->back()->withInput();
}
}如此，则实现了前台和后台共用一套key进行互联登录。
