Lofesa edited a comment on issue #1988: x-content-type-options nosniff duplicated URL: https://github.com/apache/incubator-pagespeed-mod/issues/1988#issuecomment-615333747 Stuff not processed by pagespeed have any common characterisc? If they have a common characterisc (from the same folder, some file type...) maybe you can add the header selectively to these resources. I found in the code that x-content-type header is added in 3 files: https://github.com/apache/incubator-pagespeed-mod/blob/b4bf44cc56d8bbf17494c540dfb6ef20dfcf5073/pagespeed/apache/instaweb_handler.cc#L623 https://github.com/apache/incubator-pagespeed-mod/blob/b4bf44cc56d8bbf17494c540dfb6ef20dfcf5073/net/instaweb/rewriter/server_context.cc#L1104 https://github.com/apache/incubator-pagespeed-mod/blob/b4bf44cc56d8bbf17494c540dfb6ef20dfcf5073/pagespeed/apache/apache_fetch.cc#L121 In the server_context.cc file seems not to be related. I don“t have any apache environtment to test if changing these to header->Replace can break any thing. Maybe @oschaaf or @jmarantz can have some clue.
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