Laravel-cors 跨域

 

解决跨域问题 barryvdh/Laravel-cors： https://learnku.com/articles/42923

　composer

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1	"league/flysystem": "1.1",

　app.php

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1 2	//filesystems $app->configure('filesystems');

　　

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$app->middleware([     Barryvdh\Cors\HandleCors::class, ]);

 

其他原因

The 'Access-Control-Allow-Origin' header contains multiple values'*, *', but only one is allowed.

https://www.cnblogs.com/zsg88/articles/11576324.html

 

还有可能是nginx转发导致nginx.conf多次add_haerder引起的报错

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http {       add_header Access-Control-Allow-Origin *;     add_header Access-Control-Allow-Methods 'GET, POST, OPTIONS';     add_header Access-Control-Allow-Headers     ... }

　　

可以在nginx转发规则前后使用proxy_hide_header隐藏之前声明的头参数

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location ^~ /v2/ {         proxy_pass http://127.0.0.1:8091;         proxy_set_header X-Real-IP $remote_addr;         proxy_set_header Host $host;         proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;           proxy_hide_header Access-Control-Allow-Origin;         proxy_hide_header Access-Control-Allow-Methods;         proxy_hide_header Access-Control-Allow-Headers;       }