Generate absolute URL with specific scheme in Symfony2

Question

I want to generate an absolute URL with a specific scheme (https) in a Symfony2 controller. All the solutions I found point me to configure the targeted route so that it requires that scheme. But I need the route to remain accessible in http, so I can't set it to require https (in which case http requests are redirected to the corresponding https URL).

Is there a way to generate an URL with, in the scope of that URL generation only, a specific scheme?

I saw that using the 'network' keyword generates a "network path"-style URL, which looks like "//example.com/dir/file"; so maybe I can simply do

'https:' . $this->generateUrl($routeName, $parameters, 'network')

But I don't know if this will be robust enough to any route or request context.

UPDATE: after investigation in the URL generation code, this "network path" workaround seems fully robust. A network path is generated exactly as an absolute URL, without a scheme before the "//".

Looks like an robust workaround you still keep your benefit that Symfony can generate an Url based on your Route config.You can also generate an absolute Url and str_replace the http: with https: this way you dont remove the www subdomain from your domain — Raymond Nijland
– Raymond Nijland, Commented Aug 27, 2015 at 12:38
@RaymondNijland, from simple tests it seems a subdomain (like www) is correctly included in generated "network path" URLs. Still, I don't know for sure if these URLs are always the same as the corresponding absolute URL simply without the scheme before //, or if there could be specific scenarios where the results would differ... — Socce
– Socce, Commented Aug 27, 2015 at 20:40

Basit · Accepted Answer · 2016-06-17 12:23:55Z

9

Best way to go with this

$url = 'https:'.$this->generateUrl($routeName, $parameters, UrlGeneratorInterface::NETWORK_PATH)

answered Jun 17, 2016 at 12:23

Basit

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Francesco Abeni · Accepted Answer · 2020-04-01 07:58:38Z

5

According to the code or documentation, currently you cannot do that within the generateUrl method. So your "hackish" solution is still the best, but as @RaymondNijland commented you are better off with str_replace:

$url = str_replace('http:', 'https:', $this->generateUrl($routeName, $parameters));

If you want to make sure it's changed only at the beginning of the string, you can write:

$url = preg_replace('/^http:/', 'https:', $this->generateUrl($routeName, $parameters));

No, the colon (:) has no special meaning in the regex so you don't have to escape it.

edited Apr 1, 2020 at 7:58

answered Aug 27, 2015 at 12:52

Francesco Abeni

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7 Comments

Jovan Perovic Over a year ago

If OP decides to go for a string manipulation based solution, this is really nice way to do it :)

Socce Over a year ago

Yes, the regex version seems the best if we are to do it with string manipulations. The "one occurrence only" could be fooled by the fact that in some contexts, the generated URL might already be in https, in which case the string replacement could mess something else further in the URL.

Socce Over a year ago

Answer accepted, but to me the non-regex versions should be avoided, as they can mess the rest of the URL. So in the end, for me it's either the "network path" workaround (cleaner), or the regex string manipulation (easier to understand when reading the code, as it uses more common mechanisms).

Francesco Abeni Over a year ago

I agree that the preg_replace solution sounds like the best for the job. Hopefully this answer will be useful to others, too.

AWessel Over a year ago

FYI: you can't limit how often str_replace replaces. The fourth parameter is for passing the reference of a count variable.

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Jovan Perovic · Accepted Answer · 2015-08-27 12:28:33Z

3

With default UrlGenerator, I don't think that is possible, if you don't want to mess with strings.

You could make your own HttpsUrlGenerator extends UrlGenerator introducting one slight change:

Within method generate(), instead of:

return $this->doGenerate(
    $compiledRoute->getVariables(), 
    $route->getDefaults(), 
    $route->getRequirements(), 
    $compiledRoute->getTokens(), 
    $parameters, 
    $name, 
    $referenceType, 
    $compiledRoute->getHostTokens(), 
    $route->getSchemes() 
);

You could do:

return $this->doGenerate(
    $compiledRoute->getVariables(), 
    $route->getDefaults(), 
    $route->getRequirements(), 
    $compiledRoute->getTokens(), 
    $parameters, 
    $name, 
    $referenceType, 
    $compiledRoute->getHostTokens(), 
    ['https']
);

As you can see, $route->getSchemes() gets pumped into doGenerate() based on the route settings (the tutorial link you provided above).

You could even go further and externalize this schema array and supply it via __construct.

Hope this helps a bit ;)

answered Aug 27, 2015 at 12:28

Jovan Perovic

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2 Comments

Socce Over a year ago

Thanks, but as I understand it, that solution would result in all absolute URLs being generated in https, which is not desired. I could modify further that HttpsUrlGenerator to add another parameter to apply a specific scheme or not, but then it seems like I would also have to extend the rest of the stack (Router, Controller). A bit tedious. Should work, though.

Jovan Perovic Over a year ago

Yes, that is all true. Although, I thought that you actually wanted to generate https URLs only... my mistake...

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