fix(hydra): make the docs.jsonld Link header URI relative, to match Caddy and make client responsible of matching the original requeest's protocol

Author: rvanlaak

src/Hydra/State/HydraLinkProcessor.php

@@ -45,7 +45,7 @@ public function process(mixed $data, Operation $operation, array $uriVariables =
             return $this->decorated->process($data, $operation, $uriVariables, $context);
         }
 
-        $apiDocUrl = $this->urlGenerator->generate('api_doc', ['_format' => 'jsonld'], UrlGeneratorInterface::ABS_URL);
+        $apiDocUrl = $this->urlGenerator->generate('api_doc', ['_format' => 'jsonld'], UrlGeneratorInterface::ABS_PATH);
         $linkProvider = $request->attributes->get('_api_platform_links') ?? new GenericLinkProvider();
 
         foreach ($operation->getLinks() ?? [] as $link) {

src/Hydra/Tests/State/HydraLinkProcessorTest.php

@@ -42,7 +42,12 @@ public function testProcess(): void
         $context = ['request' => $request];
         $decorated = $this->createMock(ProcessorInterface::class);
         $urlGenerator = $this->createMock(UrlGeneratorInterface::class);
-        $urlGenerator->expects($this->once())->method('generate')->with('api_doc', ['_format' => 'jsonld'], UrlGeneratorInterface::ABS_URL)->willReturn('/docs');
+        $urlGenerator
+            ->expects($this->once())
+            ->method('generate')
+            ->with('api_doc', ['_format' => 'jsonld'], UrlGeneratorInterface::ABS_PATH)
+            ->willReturn('/docs')
+        ;
         (new HydraLinkProcessor($decorated, $urlGenerator))->process($data, $operation, [], $context);
     }
 }