Commits
-------
1c290d7 Add unit tests for FlattenException::getLine() and FlattenException::getFile().
a22f0cd Enhance FlattenException to include more methods from Exception. That allows it to be used in place of Exception in more places.
Discussion
----------
[HttpKernel] Enhance FlattenException to include more methods from Exception.
I'm trying to retrofit FlattenException into Drupal, in places where Drupal expects an Exception. That doesn't quite work though, as FlattenException only has some of the methods from Exception. I'm not entirely clear why it only has some, but this PR adds getFile() and getLine() so that it's a more ready drop-in. I did not add them to the toArray() method for fear of breaking BC somewhere, but that could be done as well no doubt if folks felt it was appropriate.
Note: While the parts of Drupal in question will get rewritten later anyway, I think having this information exposed is a good thing in general for logging purposes if nothing else. It's already possible to dig it out of the trace, so this is just an improved "Developer eXperience" (DX).
---------------------------------------------------------------------------
by fabpot at 2012-04-20T04:34:54Z
I'm +1 to make `FlattenException` more "compatible" with `Exception`. Can you add the other missing methods? Also, you need to populate the `$this->file` and `$this->line` value in the constructor.
---------------------------------------------------------------------------
by Crell at 2012-04-20T04:48:40Z
I knew I was forgetting something obvious...
According to http://us.php.net/manual/en/class.exception.php, I think the only other missing method is http://us.php.net/manual/en/exception.gettraceasstring.php. I'm not sure how useful that is, but I can try to approximate it if you think it's necessary. (Honestly I've never used that method on an exception myself.)
I should probably add some tests, too. Stand by for those.
---------------------------------------------------------------------------
by Crell at 2012-04-20T05:00:28Z
Now includes unit tests to make sure I didn't do anything stupid this time. I'll hold off on getTraceAsString() for now unless you think it's needed. (I'm not sure it is since it's harder to do and IMO less useful.)
Commits
-------
b611db8 [Profiler] Sub requests are not Main requests
2551270 [Profiler] Minimize the number of Profile writes
Discussion
----------
[HttpKernel] Profiler Listener tweaks
* `setParent()` is called in [`Profile::addChild()`](https://github.com/symfony/symfony/blob/master/src/Symfony/Component/HttpKernel/Profiler/Profile.php#L180) in 2.1
* The profiles are now only saved once only in the listener (either at the end of the main request or on an exception)
* The profiles are now only saved once only in the TraceableEventDispatcher (twice for the root profile when there is a kernel.terminate' event
[](http://travis-ci.org/vicb/symfony)
---------------------------------------------------------------------------
by vicb at 2012-04-13T11:15:25Z
Not so sure for the save part... I'll double check
Commits
-------
c331f4a HttpKernel test fix on windows
Discussion
----------
HttpKernel test fix on windows
The changes in `StopwatchEventTest` are only for consistency with the other tests in this file.
---------------------------------------------------------------------------
by drak at 2012-04-13T04:16:19Z
@fabpot - This seems to be an eternal problem with the these particular tests. I wonder if there is a better way to do this. How about a simple greater than condition to show time has elapsed?
---------------------------------------------------------------------------
by Tobion at 2012-04-13T04:33:04Z
The tests are fine. I didn't change them. Just made it more consistent.
---------------------------------------------------------------------------
by drak at 2012-04-13T04:49:20Z
Yes, but if you look at the history of these tests files, they are constantly being tweaked for whatever reason (and they often fail on windows builds randomly). This is a clear indication the tests are not robust and a different approach is probably warranted if it can be found.
---------------------------------------------------------------------------
by drak at 2012-04-13T04:52:53Z
@Tobion - regarding the commit message, what does "fix" refer to if the tests are fine?
---------------------------------------------------------------------------
by Tobion at 2012-04-13T04:56:39Z
The test in `KernelTest` did not pass for me. That's fixed.
Commits
-------
f1f1494 Added an exception when passing an invalid object to ApcClassLoader
f5cb167 [ClassLoader] Added a DebugClassLoader using composition
0e54a22 Updated the changelog
eae772e [ClassLoader] Added an ApcClassLoader
4d1333f Changed the test autoloading to use the new autoloader
09850bd [ClassLoader] Added a simplified PSR-0 ClassLoader
Discussion
----------
Autoloader refactoring
Bug fix: no
Feature addition: yes
Backwards compatibility break: no
Symfony2 tests pass: [](http://travis-ci.org/stof/symfony)
As discussed in #3623, I added a new ClassLoader instead of modifying the UniversalClassLoader, to be able to use the method names without BC concerns. The new class works the same than the composer autoloader regarding the handling of fallbacks, to be able to reuse namespace maps generated by composer.
```php
<?php
// autoload.php
require_once __DIR__.'/vendor/symfony/class-loader/Symfony/Component/ClassLoader/ClassLoader.php';
$loader = new Symfony\Component\ClassLoader\ClassLoader();
$map = require __DIR__.'/vendor/.composer/autoload_namespaces.php';
$loader->addPrefixes($map);
$loader->register();
```
Differences with the composer class loader:
- Composer's ``add`` method is named ``addPrefix`` in the Symfony ClassLoader
- the methods related to the class map are removed as Symfony has a separate laoder for class maps
- the ``addPrefixes`` method is added, accepting a namespace map.
I also added a new ApcClassLoader which uses composition instead of inheriting from a class loader, which makes it far more easier to reuse (we could wrap a Composer autoloader with it for instance).
```php
<?php
$composerLoader = require __DIR__.'/vendor/.composer/autoload.php';
// no need to require the file manually as Composer already registered its autoloader
$cachedLoader = new Symfony\Component\ClassLoader\ApcClassLoader('autoload.my_app', $composerLoader);
$cachedLoader->register();
// unregister the Composer autoloader as we wrapped it in the ApcClassLoader
$composerLoader->unregister();
```
TODO:
- refactor the Debug class loader to use composition too to be able to support different class loaders
---------------------------------------------------------------------------
by fabpot at 2012-04-02T16:31:28Z
Can you update the CHANGELOG and the UPGRADE file accordingly?
---------------------------------------------------------------------------
by stof at 2012-04-02T16:47:43Z
I added a note in the CHANGELOG. There is nothing to add in the UPGRADE file as the change is fully BC (I did not change the UniversalClassLoader at all so it can still be used).
I'm working on the Debug loader right now so please wait a bit before merging
---------------------------------------------------------------------------
by stof at 2012-04-02T17:12:11Z
Here is a new DebugClassLoader using composition too. this way, it is able to support the UniversalClassLoader, the ApcUniversalClassLoader (without dropping the use of APC as done previously), the new ClassLoader, the new ApcClassLoader and even the composer autoloader.
I'm not sure about the use of ``method_exists`` as it could break if an autoloader implements a protected ``findFile`` method (crappy PHP 😢) but hardcoding the supported classes would be a pain and requiring an interface would make the autoloaders more difficult to use (as the interface would need to be required first) and would drop the support of the composer autoloader.
Commits
-------
3f2b917 added a configurable extension base class
Discussion
----------
added a configurable extension base class
This is mostly a convenience class which provides first-class integration with the Config/Definition component.
Usage would be to extend the Kernel, and set the errorReportingLevel prior to calling parent::__construct(). Not ideal, but this doesn't break BC and allows the user to defer the decision as late as possible. This can/should be handled better in 2.1.x
Commits
-------
ed8c1c0 Fixed AbstractProfilerStorageTest and some minor CS changes.
1ac581e Overwrite the profile data if the token already exists like in the other implementations.
198d406 Return profiler results sorted by time in descending order like in the other implementations.
9d8e3f2 Refactored profiler storage tests to share some code.
Discussion
----------
[WIP] Refactored profiler tests including some storage fixes
Bug fix: yes
Feature addition: no
Backwards compatibility break: no
Symfony2 tests pass: yes
While refactoring the tests I came across some inconsistencies. Two of them are already fixed in this PR.
One thing left is the [MongoDbProfilerStorageTest::testCleanup()](9d8e3f2da4/tests/Symfony/Tests/Component/HttpKernel/Profiler/MongoDbProfilerStorageTest.php (L51)) test which fails in all other storage implementations. The mongodb implementation uses the `time` value from the profiler data to clean up the storage while the others additionally save a `created_at` value which is then used. For me this `created_at` value does not make any sense and I would suggest to change the other implementations to use the `time` value for cleaning up. What do you think?
---------------------------------------------------------------------------
by pulzarraider at 2012-02-27T06:55:06Z
+1 for refactoring profiler tests, I will update my RedisProfilerStorage after your changes will be merged.
---------------------------------------------------------------------------
by snc at 2012-02-28T20:05:12Z
Any suggestions about the cleanup issue?
Commits
-------
bafcaaf Removed version field
f9d9dc7 Add branch-alias for composer
Discussion
----------
Add branch-alias for composer
This should restore the 2.1-dev version (as an alias of dev-master) so that `2.*` or `2.1.*` constraints work again. I'll adjust packagist soon to also display those aliases.
Commits
-------
7474293 memcache profiler storage support added
Discussion
----------
[HttpKernel] [FrameworkBundle] Memcache(d) Profiler Storage added
Bug fix: no
Feature addition: yes
Backwards compatibility break: no
Symfony2 tests pass: yes
Fixes the following tickets: -
Todo: -
There are 2 memcache PHP extensions: Memcache and MemcacheD (with "D" at the end) - both are supported.
How to use Memcache Profiler Storage (Memcache php extension is used):
change (or add if there isn't) "dsn" in framework/profiler section in config_dev.yml
```
...
framework:
...
profiler:
...
dsn: memcache://127.0.0.1/11211
...
```
How to use Memcached Profiler Storage (MemcacheD php extension is used):
change "dsn" in framework/profiler section in config_dev.yml
```
...
framework:
...
profiler:
...
dsn: memcached://127.0.0.1/11211
...
```
Last changes:
- memcached support addedd
- optimized performance (serialization done in extension, index is created with ```append``` function)
- updated to last version of Profiler (find by method, avoid duplications)
- done squash on commits
---------------------------------------------------------------------------
by stloyd at 2011-12-01T23:36:02Z
You need to add check for index name size, AFAIK memcache will fail if key is longer than 250 characters.
Also please do an `squash` for all those commits.
---------------------------------------------------------------------------
by pulzarraider at 2011-12-02T00:15:28Z
@stloyd Thanks. I will add the check for key length.
I am just starting with git. Could you please add some tutorial about squash to a documentation page: http://symfony.com/doc/2.0/contributing/code/patches.html ? It will help me (and maybe some others) to do it correct way.
---------------------------------------------------------------------------
by stof at 2011-12-02T00:19:01Z
http://help.github.com/rebase/
---------------------------------------------------------------------------
by pulzarraider at 2011-12-03T18:56:11Z
Thanks @stof, rebase done.
---------------------------------------------------------------------------
by dlsniper at 2011-12-11T14:00:17Z
Hi,
Would it be possible to either use Memcached instead of Memcache or make it configurable to use either Memcache or Memcached?
I've did a little digging on the benefits of using Memcached over Memcache (like for example: http://stackoverflow.com/questions/1442411/using-memcache-vs-memcached-with-phphttp://devzone.zend.com/1869/zendcon-sessions-episode-040-memcached-the-better-memcache-interface/ ) and maybe this will also help in not having two extensions installed for people who are using Memcached already.
Regards.
---------------------------------------------------------------------------
by pulzarraider at 2011-12-11T16:15:58Z
@dlsniper thanks for great comment. I will add memcached support.
---------------------------------------------------------------------------
by stof at 2011-12-12T20:49:00Z
@pulzarraider what is the status of this PR ? Is it still a WIP ?
---------------------------------------------------------------------------
by pulzarraider at 2011-12-12T22:58:48Z
@stof Yes, it's still WIP. I'm working on a memcached (with D at the end) support. It will be finished in the next few days.
---------------------------------------------------------------------------
by dlsniper at 2011-12-15T12:51:52Z
@pulzarraider if I can help you with the PR let me know.
---------------------------------------------------------------------------
by pulzarraider at 2012-01-08T20:22:24Z
@dlsniper @stof I've finally added memcached support and done some optimizations. Memcache(d) profiler storage is now ready.
---------------------------------------------------------------------------
by dlsniper at 2012-01-08T22:12:29Z
I'm glad you finished this @pulzarraider
Thanks! for your hard work!
+1 for this PR
@stof, @fabpot is it good to go on master?
---------------------------------------------------------------------------
by pulzarraider at 2012-01-28T19:45:56Z
@stof, @fabpot ping
Commits
-------
3dd3d58 [EventListener] Fix an issue with sub-requests
71bf279 cleanup
acdb325 [StopWatch] Provide a cleaner API
acd1287 [Stopwatch] rename the section event to avoid collisions
eb540be [Profiler] Allow profiling the terminate event
4ccdc53 [HttpKernel] Cleanup of PdoProfilerStorage
814876f [HttpKernel] Tweak the code of the ProfilerListener
Discussion
----------
[Profiler] Allow profiling the terminate event
This PR is mainly about allowing to profile the terminate event (i.e. see it in the timeline panel)
There are some other tweaks.
---------------------------------------------------------------------------
by vicb at 2012-02-02T14:43:20Z
please don't merge for now. good question. bad answer.
---------------------------------------------------------------------------
by vicb at 2012-02-06T15:05:46Z
While first commits were focused on problem solving, the last brings a clean API with the ability to re-open an existing section in order to add events (re-setting event origins and merging them were just hacks).
Should be ready to be merged.
_Edit: Sorry, couldn't resist adding a private helper class again!_
---------------------------------------------------------------------------
by stof at 2012-02-06T18:30:09Z
@vicb you should stop adding such classes defined in the same file. Otherwise we will have to change the CS (and to stop telling we respect the PSR-0 standard)
---------------------------------------------------------------------------
by vicb at 2012-02-06T18:33:36Z
Once again PSR-0 is about autoloading which is exactly why I do not want in such cases. CS are an other matter and yes I think they should be changed to allow this (and I am going to submit a PR right now).
The only argument I could accept is whether this class should be private or not.
---------------------------------------------------------------------------
by vicb at 2012-02-06T19:57:06Z
Thanks for your valuable feedback @stof
---------------------------------------------------------------------------
by fabpot at 2012-02-11T20:53:03Z
Have you tested it on a project? Because it breaks my simple examples (where I have some sub-requests).
---------------------------------------------------------------------------
by vicb at 2012-02-12T09:47:23Z
my bad, should be ok now.
Commits
-------
fe62401 optimized string starts with checks
Discussion
----------
optimized string starts with checks
Doing this with strpos() is slightly faster than substr().
```
Bug fix: no
Feature addition: no
Backwards compatibility break: no
Symfony2 tests pass: yes
Fixes the following tickets: -
Todo: -
```
---------------------------------------------------------------------------
by vicb at 2012-01-11T19:58:27Z
How faster ? even if the string is long and do not contain an occurrence of the sub-string ?
Looks like micro-(not)-optimizations to me.
---------------------------------------------------------------------------
by kriswallsmith at 2012-01-11T20:04:26Z
The difference is about 0.1s when repeated 1M times.
---------------------------------------------------------------------------
by vicb at 2012-01-11T20:08:12Z
% would be better (machine & env independant), what string size, what match offset ?
I personally vote against (`substr` is more meaningful to me and I do not like micro-optims)
---------------------------------------------------------------------------
by kriswallsmith at 2012-01-11T20:12:34Z
I personally consider this a coding standard but don't want to bikeshed here :)
---------------------------------------------------------------------------
by vicb at 2012-01-11T20:28:08Z
I have [tried](https://gist.github.com/1596588) at home.
`strpos ` **is** faster unless you have a very long string, probably because you do not need to create a new string, interesting, thanks for the tip.
---------------------------------------------------------------------------
by Tobion at 2012-01-11T22:40:18Z
I think strpos() is more useful. Say you want to change the string you have to replace 2 variables (the text and the length parameter) when using substr(). It could also introduce bugs when they don't match. With strpos() it's only the text.
---------------------------------------------------------------------------
by robocoder at 2012-01-11T22:43:22Z
alternate micro-optimization that doesn't create a temporary string:
```
strncmp($v, "@", 1) === 0
```
---------------------------------------------------------------------------
by Tobion at 2012-01-11T22:47:12Z
@robocoder probably the fastest solution but needs to be benchmarked
fix CS
fix CS + remove unneeded else
add documentation, change protected methods as private
rename var
throw exception for invalid name, index fix
memcache profiler storage support added, fix CS and minor bugs
fix CS
removed unneeded else
- memcached support added
- improved performance (serialization, index)
updated code to last version of Profiler
Commits
-------
887c0e9 moved EngineInterface::stream() to a new StreamingEngineInterface to keep BC with 2.0
473741b added the possibility to change a StreamedResponse callback after its creation
8717d44 moved a test in the constructor
e44b8ba made some cosmetic changes
0038d1b [HttpFoundation] added support for streamed responses
Discussion
----------
[HttpFoundation] added support for streamed responses
To stream a Response, use the StreamedResponse class instead of the
standard Response class:
$response = new StreamedResponse(function () {
echo 'FOO';
});
$response = new StreamedResponse(function () {
echo 'FOO';
}, 200, array('Content-Type' => 'text/plain'));
As you can see, a StreamedResponse instance takes a PHP callback instead of
a string for the Response content. It's up to the developer to stream the
response content from the callback with standard PHP functions like echo.
You can also use flush() if needed.
From a controller, do something like this:
$twig = $this->get('templating');
return new StreamedResponse(function () use ($templating) {
$templating->stream('BlogBundle:Annot:streamed.html.twig');
}, 200, array('Content-Type' => 'text/html'));
If you are using the base controller, you can use the stream() method instead:
return $this->stream('BlogBundle:Annot:streamed.html.twig');
You can stream an existing file by using the PHP built-in readfile() function:
new StreamedResponse(function () use ($file) {
readfile($file);
}, 200, array('Content-Type' => 'image/png');
Read http://php.net/flush for more information about output buffering in PHP.
Note that you should do your best to move all expensive operations to
be "activated/evaluated/called" during template evaluation.
Templates
---------
If you are using Twig as a template engine, everything should work as
usual, even if are using template inheritance!
However, note that streaming is not supported for PHP templates. Support
is impossible by design (as the layout is rendered after the main content).
Exceptions
----------
Exceptions thrown during rendering will be rendered as usual except that
some content might have been rendered already.
Limitations
-----------
As the getContent() method always returns false for streamed Responses, some
event listeners won't work at all:
* Web debug toolbar is not available for such Responses (but the profiler works fine);
* ESI is not supported.
Also note that streamed responses cannot benefit from HTTP caching for obvious
reasons.
---------------------------------------------------------------------------
by Seldaek at 2011/12/21 06:34:13 -0800
Just an idea: what about exposing flush() to twig? Possibly in a way that it will not call it if the template is not streaming. That way you could always add a flush() after your </head> tag to make sure that goes out as fast as possible, but it wouldn't mess with non-streamed responses. Although it appears flush() doesn't affect output buffers, so I guess it doesn't need anything special.
When you say "ESI is not supported.", that means only the AppCache right? I don't see why this would affect Varnish, but then again as far as I know Varnish will buffer if ESI is used so the benefit of streaming there is non-existent.
---------------------------------------------------------------------------
by cordoval at 2011/12/21 08:04:21 -0800
wonder what the use case is for streaming a response, very interesting.
---------------------------------------------------------------------------
by johnkary at 2011/12/21 08:19:48 -0800
@cordoval Common use cases are present fairly well by this RailsCast video: http://railscasts.com/episodes/266-http-streaming
Essentially it allows faster fetching of web assets (JS, CSS, etc) located in the <head></head>, allowing those assets to be fetched as soon as possible before the remainder of the content body is computed and sent to the browser. The end goal is to improve page load speed.
There are other uses cases too like making large body content available quickly to the service consuming it. Think if you were monitoring a live feed of JSON data of newest Twitter comments.
---------------------------------------------------------------------------
by lsmith77 at 2011/12/21 08:54:35 -0800
How does this relate the limitations mentioned in:
http://yehudakatz.com/2010/09/07/automatic-flushing-the-rails-3-1-plan/
Am I right to understand that due to how twig works we are not really streaming the content pieces when we call render(), but instead the entire template with its layout is rendered and only then will we flush? or does it mean that the render call will work its way to the top level layout template and form then on it can send the content until it hits another block, which it then first renders before it continues to send the data?
---------------------------------------------------------------------------
by stof at 2011/12/21 09:02:53 -0800
@lsmith77 this is why the ``stream`` method calls ``display`` in Twig instead of ``render``. ``display`` uses echo to print the output of the template line by line (and blocks are simply method calls in the middle). Look at your compiled templates to see it (the ``doDisplay`` method)
Rendering a template with Twig simply use an output buffer around the rendering.
---------------------------------------------------------------------------
by fabpot at 2011/12/21 09:24:33 -0800
@lsmith77: We don't have the Rails problem thanks to Twig as the order of execution is the right one by default (the layout is executed first); it means that we can have the flush feature without any change to how the core works. As @stof mentioned, we are using `display`, not `render`, so we are streaming your templates for byte one.
---------------------------------------------------------------------------
by fabpot at 2011/12/21 09:36:41 -0800
@Seldaek: yes, I meant ESI with the PHP reverse proxy.
---------------------------------------------------------------------------
by fabpot at 2011/12/21 09:37:34 -0800
@Seldaek: I have `flush()` support for Twig on my todo-list. As you mentioned, It should be trivial to implement.
---------------------------------------------------------------------------
by fzaninotto at 2011/12/21 09:48:18 -0800
How do streaming responses deal with assets that must be called in the head, but are declared in the body?
---------------------------------------------------------------------------
by fabpot at 2011/12/21 09:52:12 -0800
@fzaninotto: What do you mean?
With Twig, your layout is defined with blocks ("holes"). These blocks are overridden by child templates, but evaluated as they are encountered in the layout. So, everything works as expected.
As noted in the commit message, this does not work with PHP templates for the problems mentioned in the Rails post (as the order of execution is not the right one -- the child template is first evaluated and then the layout).
---------------------------------------------------------------------------
by fzaninotto at 2011/12/21 10:07:35 -0800
I was referring to using Assetic. Not sure if this compiles to Twig the same way as javascript and stylesheet blocks placed in the head - and therefore executed in the right way.
---------------------------------------------------------------------------
by fabpot at 2011/12/21 10:34:59 -0800
@Seldaek: I've just added a `flush` tag in Twig 1.5: 1d6dfad4f5
---------------------------------------------------------------------------
by catchamonkey at 2011/12/21 13:29:22 -0800
I'm really happy you've got this into the core, it's a great feature to have! Good work.
Commits
-------
cae7db0 Be more tolerant and also accept <esi:include ...></esi:include>, also if it is not 100% standards compliant.
Discussion
----------
Be more tolerant and also accept <esi:include ...></esi:include>
I know this is not 100% standards compliant, but:
We need to do some XHTML processing on the output using PHP's DOM extension and the underlying libxml2.
libxml2 seems to be unable to keep the <esi:include /> tag as such and will expand it to ```<esi:include ...></esi:include>```.
Note this has nothing to do with having LIBXML_NOEMPTYTAG set (http://php.net/manual/de/domdocument.savexml.php). Rather it seems to be a problem for libxml that it cannot recognize <esi:include> as an "EMPTY" tag (in the DTD sense) because it is not defined in a standard xhtml1-strict DTD.
Commits
-------
4afc6ac Updated CHANGELOG-2.1
3d3239c Added Filesystem Component mention in composer.json
5775a0a Added composer.json
b26ae4a Added README
fbe9507 Added LICENSE
818a332 [Component] Moved Filesystem class to its own component
Discussion
----------
Filesystem component
Related to #2946
William
---------------------------------------------------------------------------
by stof at 2011/12/22 10:58:25 -0800
you need to add the new component in the ``replace`` section of the main composer.json, and you also need to add it as a dependency for FrameworkBundle as it defines a service using it.
---------------------------------------------------------------------------
by stof at 2011/12/22 10:59:34 -0800
and you need to update the changelog file
---------------------------------------------------------------------------
by willdurand at 2011/12/22 11:06:04 -0800
@stof thanks. Is it ok ?
---------------------------------------------------------------------------
by stof at 2011/12/22 11:13:31 -0800
mentioning the move only once in the changelog would probably be enough (and it is especially not needed in the FrameworkBundle section IMO) but otherwise it's fine
To stream a Response, use the StreamedResponse class instead of the
standard Response class:
$response = new StreamedResponse(function () {
echo 'FOO';
});
$response = new StreamedResponse(function () {
echo 'FOO';
}, 200, array('Content-Type' => 'text/plain'));
As you can see, a StreamedResponse instance takes a PHP callback instead of
a string for the Response content. It's up to the developer to stream the
response content from the callback with standard PHP functions like echo.
You can also use flush() if needed.
From a controller, do something like this:
$twig = $this->get('templating');
return new StreamedResponse(function () use ($templating) {
$templating->stream('BlogBundle:Annot:streamed.html.twig');
}, 200, array('Content-Type' => 'text/html'));
If you are using the base controller, you can use the stream() method instead:
return $this->stream('BlogBundle:Annot:streamed.html.twig');
You can stream an existing file by using the PHP built-in readfile() function:
new StreamedResponse(function () use ($file) {
readfile($file);
}, 200, array('Content-Type' => 'image/png');
Read http://php.net/flush for more information about output buffering in PHP.
Note that you should do your best to move all expensive operations to
be "activated/evaluated/called" during template evaluation.
Templates
---------
If you are using Twig as a template engine, everything should work as
usual, even if are using template inheritance!
However, note that streaming is not supported for PHP templates. Support
is impossible by design (as the layout is rendered after the main content).
Exceptions
----------
Exceptions thrown during rendering will be rendered as usual except that
some content might have been rendered already.
Limitations
-----------
As the getContent() method always returns false for streamed Responses, some
event listeners won't work at all:
* Web debug toolbar is not available for such Responses (but the profiler works fine);
* ESI is not supported.
Also note that streamed responses cannot benefit from HTTP caching for obvious
reasons.
