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Add X-Robots-Tag in header of response in dev mode #30318

xaro93 opened this Issue Feb 20, 2019 · 1 comment


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xaro93 commented Feb 20, 2019

For security, you can automatically add the X-Robots-Tag: noindex header in developer mode. Sometimes it happens that someone will make such a website available on the Internet. I think it would be better for search engines to not index such websites.

Robots meta tag and X-Robots-Tag HTTP header specifications


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javiereguiluz commented Feb 20, 2019

I like this proposal a lot!

We already include <meta name="robots" content="noindex,nofollow" /> for anything related to the profiler ... but I think it makes sense to add X-Robots-Tag: noindex, nofollow to the entire site if it's being run in dev environment. Anyone see any potential drawback?

@javiereguiluz javiereguiluz added this to the next milestone Feb 20, 2019

@fabpot fabpot closed this Mar 4, 2019

fabpot added a commit that referenced this issue Mar 4, 2019

feature #30325 [HttpKernel] Prevent search engines from indexing dev …
…applications (GaryPEGEOT)

This PR was squashed before being merged into the 4.3-dev branch (closes #30325).


[HttpKernel] Prevent search engines from indexing dev applications

| Q             | A
| ------------- | ---
| Branch?       | master
| Bug fix?      | no
| New feature?  | yes
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #30318
| License       | MIT
| Doc PR        | TODO

Add the *X-Robots-Tag: noindex* to dev (and test) applications to prevent search engines to index them.


3dd8671 [HttpKernel] Prevent search engines from indexing dev applications
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