This PR was squashed before being merged into the 3.4 branch (closes#34385).
Discussion
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Avoid empty "If-Modified-Since" header in validation request
| Q | A
| ------------- | ---
| Branch? | 3.4
| Bug fix? | yes
| New feature? | no
| Deprecations? | no
| Tickets |
| License | MIT
| Doc PR |
Just noticed that when a response has been cached that is `public` and has an `maxAge` but does _not_ provide `Last-Modified`, the validation subrequest will have an empty `If-Modified-Since` header value.
Commits
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960faef66f Avoid empty \"If-Modified-Since\" header in validation request
* Added a hardcoded day 01 in order to output the proper month November
which is the correct EOL and EOM month.
* \DateTime::createFromFormat('mY') will output December for every month
where day 31 exists.
This PR was merged into the 3.4 branch.
Discussion
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[HttpKernel] Fix getFileLinkFormat() to avoid returning the wrong URL in Profiler
| Q | A
| ------------- | ---
| Branch? | >= 3.4 <!-- see below -->
| Bug fix? | yes
| New feature? | no <!-- please update src/**/CHANGELOG.md files -->
| BC breaks? | no <!-- see https://symfony.com/bc -->
| Deprecations? | no <!-- please update UPGRADE-*.md and src/**/CHANGELOG.md files -->
| Tests pass? | yes <!-- please add some, will be required by reviewers -->
| Fixed tickets | #32444 <!-- #-prefixed issue number(s), if any -->
| License | MIT
| Doc PR | N/A <!-- required for new features -->
I had this problem and I noticed that an issue had already been registered.
So I registered the pull request.
Commits
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9ed5f03b98 Fix getFileLinkFormat() to avoid returning the wrong URL in Profiler
This PR was merged into the 3.4 branch.
Discussion
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[HttpKernel] Fix s-maxage=3 transient test
| Q | A
| ------------- | ---
| Branch? | 3.4
| Bug fix? | yes
| New feature? | no
| BC breaks? | no
| Deprecations? | no
| Tests pass? | yes
| Fixed tickets | NA
| License | MIT
| Doc PR | NA
sometime the http server returns a `s-maxage=3` header (https://travis-ci.org/symfony/symfony/jobs/569326531)
This PR fixes tests to allow both 2 and 3
Commits
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f019b5214d Fix s-maxage=3 transient test
This PR was squashed before being merged into the 3.4 branch (closes#32800).
Discussion
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Improve some URLs
| Q | A
| ------------- | ---
| Branch? | 3.4 <!-- see below -->
| Bug fix? | no
| New feature? | no <!-- please update src/**/CHANGELOG.md files -->
| BC breaks? | no <!-- see https://symfony.com/bc -->
| Deprecations? | no <!-- please update UPGRADE-*.md and src/**/CHANGELOG.md files -->
| Tests pass? | yes <!-- please add some, will be required by reviewers -->
| Fixed tickets | N/A <!-- #-prefixed issue number(s), if any -->
| License | MIT
| Doc PR | N/A <!-- required for new features -->
<!--
Replace this notice by a short README for your feature/bugfix. This will help people
understand your PR and can be used as a start for the documentation.
Additionally (see https://symfony.com/roadmap):
- Bug fixes must be submitted against the lowest maintained branch where they apply
(lowest branches are regularly merged to upper ones so they get the fixes too).
- Features and deprecations must be submitted against branch 4.4.
- Legacy code removals go to the master branch.
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Commits
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fab17a4487 Improve some URLs
This PR was merged into the 3.4 branch.
Discussion
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[Intl] fix nullable phpdocs and useless method visibility of internal class
| Q | A
| ------------- | ---
| Branch? | 3.4
| Bug fix? | no
| New feature? | no <!-- please update src/**/CHANGELOG.md files -->
| BC breaks? | no <!-- see https://symfony.com/bc -->
| Deprecations? | no <!-- please update UPGRADE-*.md and src/**/CHANGELOG.md files -->
| Tests pass? | yes <!-- please add some, will be required by reviewers -->
| Fixed tickets |
| License | MIT
| Doc PR |
Fix stuff found in #32525
Commits
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63b71b5ade [Intl] fix nullable phpdocs and useless method visibility of internal class
This PR was merged into the 3.4 branch.
Discussion
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[HttpKernel] do not stopwatch sections when profiler is disabled
| Q | A
| ------------- | ---
| Branch? | 4.3
| Bug fix? | yes
| New feature? | no <!-- please update src/**/CHANGELOG.md files -->
| BC breaks? | no <!-- see https://symfony.com/bc -->
| Deprecations? | no <!-- please update UPGRADE-*.md and src/**/CHANGELOG.md files -->
| Tests pass? | yes <!-- please add some, will be required by reviewers -->
| Fixed tickets |
| License | MIT
| Doc PR |
the toolbar and profiler panel disable to profiler which then does not set the X-Debug-Token. so when the header does not exist, do not call the stopwatch methods with `null` which violates the contract and does not make sense. found with #32242
Commits
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8718cd1b15 [HttpKernel] do not stopwatch sections when profiler is disabled
the toolbar and profiler panel disable to profiler which then does not set the X-Debug-Token. so when the header does not exist, do not call the stopwatch methods with null which violates the contract and does not make sense
This PR was merged into the 3.4 branch.
Discussion
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FragmentListener - fix typo in annotation
| Q | A
| ------------- | ---
| Branch? | 3.4
| Bug fix? | no
| New feature? | no
| BC breaks? | no
| Deprecations? | no
| Tests pass? | yes
| Fixed tickets |
| License | MIT
| Doc PR |
Just a small typo I've found in fragment listener :)
Commits
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b6ff836a49 fix typo
The temp-file that the test currently creates is `/tmp/log`.
This may exist on many platforms already (including `platform.sh` app containers).
With the proposed patch way the collision will be less likely.
Sponsored-by: Platform.sh
This PR was squashed before being merged into the 3.4 branch (closes#26532).
Discussion
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[HttpKernel] Correctly merging cache directives in HttpCache/ResponseCacheStrategy
| Q | A
| ------------- | ---
| Branch? | 3.4
| Bug fix? | yes
| New feature? | no
| BC breaks? | no
| Deprecations? | no
| Tests pass? | yes
| Fixed tickets | #26245, #26352, #28872
| License | MIT
| Doc PR | -
This PR is a first draft to fix the incorrect merging of private and other cache-related headers that are not meant for the shared cache but the browser (see mentioned issues).
The existing implementation of `HttpFoundation\Response` is very much tailored to the `HttpCache`, for example `isCacheable` returns `false` if the response is `private`, which is not true for a browser cache. That is why my implementation does not longer use much of the response methods. They are however still used by the `HttpCache` and we should keep them as-is. FYI, the `ResponseCacheStrategy` does **not** affect the stored data of `HttpCache` but is only applied to the result of multiple merged subrequests/ESI responses.
I did read up a lot on RFC2616 as a reference. [Section 13.4](https://www.w3.org/Protocols/rfc2616/rfc2616-sec13.html#sec13.4) gives an overall view of when a response MAY be cached. [Section 14.9.1](https://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.9.1) has more insight into the `Cache-Control` directives.
Here's a summary of the relevant information I applied to the implementation:
- > Unless specifically constrained by a cache-control (section 14.9) directive, a caching system MAY always store a successful response (see section 13.8) as a cache entry, MAY return it without validation if it is fresh, and MAY return it after successful validation.
A response without cache control headers is totally fine, and it's up to the cache (shared or private) to decide what to do with it. That is why the implementation does not longer set `no-cache` if no `Cache-Control` headers are present.
- > A response received with a status code of 200, 203, 206, 300, 301 or 410 MAY be stored […] unless a cache-control directive prohibits caching.
> A response received with any other status code (e.g. status codes 302 and 307) MUST NOT be returned […] unless there are cache-control directives or another header(s) that explicitly allow it.
This is what `ResponseCacheStrategy::isUncacheable` implements to decide whether a response is not cacheable at all. It differs from `Response::isCacheable` which only returns true if there are actual `Cache-Control` headers.
- > [Section 13.2.3](https://www.w3.org/Protocols/rfc2616/rfc2616-sec13.html#sec13.2.3): When a response is generated from a cache entry, the cache MUST include a single Age header field in the response with a value equal to the cache entry's current_age.
That's why the implementation **always** adds the `Age` header. It takes the oldest age of any of the responses as common denominator for the content.
- > [Section 14.9.3](https://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.9.3): If a response includes an s-maxage directive, then for a shared cache (but not for a private cache), the maximum age specified by this directive overrides the maximum age specified by either the max-age directive or the Expires header.
This effectively means that `max-age`, `s-maxage` and `Expires` must all be kept on the response. My implementation assumes that we can only do that if they exist in **all** of the responses, and then takes the lowest value of any of them. Be aware the implementation might look confusing at first. Due to the fact that the `Age` header might come from another subresponse than the lowest expiration value, the values are stored relative to the current response date and then re-calculated based on the age header.
The Symfony implementation did not and still does not implement the full RFC. As an example, some of the `Cache-Control` headers (like `private` and `no-cache`) MAY actually have a string value, but the implementation only supports boolean. Also, [Custom `Cache-Control` headers](https://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.9.6) are currently not merged into the final response.
**ToDo/Questions:**
1. [Section 13.5.2](https://www.w3.org/Protocols/rfc2616/rfc2616-sec13.html#sec13.5.2) specifies that we must add a [`Warning 214 Transformation applied`](https://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.46) if we modify the response headers.
2. Should we add an `Expires` headers based on `max-age` if none is explicitly set in the responses? This would essentially provide the same information as `max-age` but with support for HTTP/1.0 proxies/clients.
3. I'm not sure about the implemented handling of the `private` directive. The directive is currently only added to the final response if it is present in all of the subresponses. This can effectively result in no cache-control directive, which does not tell a shared cache that the response must not be cached. However, adding a `private` might also tell a browser to actually cache it, even though non of the other responses asked for that.
4. > [Section 14.9.2](https://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.9.2): The purpose of the `no-store` directive is to prevent the inadvertent release or retention of sensitive information […]. The `no-store` directive applies to the entire message, and MAY be sent either in a response or in a request. If sent in a request, a cache MUST NOT store any part of either this request or any response to it. If sent in a response, a cache MUST NOT store any part of either this response or the request that elicited it.
I have not (yet) validated whether the `HttpCache` implementation respects any of this.
5. As far as I understand, the current implementation of [`ResponseHeaderBag::computeCacheControlValue`](https://github.com/symfony/symfony/blob/master/src/Symfony/Component/HttpFoundation/ResponseHeaderBag.php#L313) is incorrect. `no-cache` means a response [must not be cached by a shared or private cache](https://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.9.1), which overrides `private` automatically.
5. The unit tests are still very limited and I want to add plenty more to test and sort-of describe the implementation or assumptions on the RFC.
/cc @nicolas-grekas
#SymfonyConHackday2018
Commits
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893118f978 [HttpKernel] Correctly merging cache directives in HttpCache/ResponseCacheStrategy
