mashirozx commented on issue #1005: PageSpeed Optimized CSS and CORS Headers URL: https://github.com/apache/incubator-pagespeed-ngx/issues/1005#issuecomment-375713921 I meeet something like this: >Failed to load https://a.com/tips_v3.7.json: The 'Access-Control-Allow-Origin' header contains multiple values '*, *', but only one is allowed. Origin 'https://a.com' is therefore not allowed access. And this is my Nginx configuration: ``` ....... pagespeed on; # Default # Needs to exist and be writable by nginx. Use tmpfs for best performance. pagespeed FileCachePath /var/ngx_pagespeed_cache; # Ensure requests for pagespeed optimized resources go to the pagespeed handler # and no extraneous headers get set. location ~ "\.pagespeed\.([a-z]\.)?[a-z]{2}\.[^.]{10}\.[^.]+" { add_header "" ""; } location ~ "^/pagespeed_static/" { } location ~ "^/ngx_pagespeed_beacon$" { } location ~* \.(json)$ { if ($http_referer = "") { return 403; } add_header 'Access-Control-Allow-Origin' *; add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS'; add_header 'Access-Control-Allow-Credentials' 'true'; add_header 'Access-Control-Allow-Headers' 'User-Agent,Keep-Alive,Content-Type'; expires 7d; log_not_found off; } ```
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