[英]Mean.io No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://localhost:3000' is therefore not allowed access
我正在尝试使用护照与Facebook进行身份验证，但返回了错误：
XMLHttpRequest无法加载https://www.facebook.com/v2.2/dialog/oauth?response_type=code&redirect_uri=…％2Fapi％2Fauth％2Ffacebook％2Fcallback＆scope = email＆client_id = 1504988306431596。 所请求的资源上没有“ Access-Control-Allow-Origin”标头。 因此，不允许访问源' http：// localhost：3000 '。
我怎样才能解决这个问题？
我认为问题在于您尚未在facebook API上设置应用程序域。 转到https://developers.facebook.com/apps/ {您的应用程序ID} / settings /，并在“应用程序域”字段上设置“本地主机”，以使其正常运行。 你已经做到了吗？
Socket.io没有'Access-Control-Allow-Origin'标头出现在请求的资源上。 因此不允许Origin'http：// localhost'访问
[英]Socket.io No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://localhost' is therefore not allowed access
所请求的资源上没有“ Access-Control-Allow-Origin”标头。 因此，不允许访问源“ localhost：8080”
[英]No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'localhost:8080' is therefore not allowed access
请求的资源上不存在“Access-Control-Allow-Origin”标头。 因此不允许Origin'http：// localhost：8100'访问
[英]No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://localhost:8100' is therefore not allowed access
XMLHttpRequest无法加载请求的资源上不存在“Access-Control-Allow-Origin”标头。 Origin'http：// localhost：3000'Google maps
[英]XMLHttpRequest cannot load No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://localhost:3000' Google maps
XMLHttpRequest无法加载。 请求的资源上不存在“Access-Control-Allow-Origin”标头。 因此不允许原点访问
[英]XMLHttpRequest cannot load. No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin is therefore not allowed access
请求的资源上不存在“Access-Control-Allow-Origin”标头。 Origin 'https://myappurl.com 因此不允许访问
[英]No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'https://myappurl.com is therefore not allowed access
[Passportjs][Angular5] 请求的资源上不存在“Access-Control-Allow-Origin”标头。 因此不允许访问原点 'null'
[英][Passportjs][Angular5] No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'null' is therefore not allowed access
如何修复“http://localhost:3000”已被 CORS 策略阻止：请求的资源上不存在“Access-Control-Allow-Origin”header。
[英]How to fix ''http://localhost:3000' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource.'
**请求的资源上不存在“Access-Control-Allow-Origin”header。**
[英]**No 'Access-Control-Allow-Origin' header is present on the requested resource.**
Access-Control-Allow-Origin'标头存在于请求的资源上。 错误
[英]Access-Control-Allow-Origin' header is present on the requested resource. error
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