Use xxh128 hash algorithm for PHP ^8.1 (#44)

Author: alexander-schranz

src/Psr6Store.php

@@ -57,6 +57,8 @@ class Psr6Store implements Psr6StoreInterface, ClearableInterface
      */
     private array $locks = [];
 
+    private string $hashAlgorithm;
+
     /**
      * When creating a Psr6Store you can configure a number options.
      * See the README for a list of all available options and their description.
@@ -98,6 +100,7 @@ public function __construct(array $options = [])
         $this->options = $resolver->resolve($options);
         $this->cache = $this->options['cache'];
         $this->lockFactory = $this->options['lock_factory'];
+        $this->hashAlgorithm = version_compare(PHP_VERSION, '8.1.0', '>=') ? 'xxh128' : 'sha256';
     }
 
     public function lookup(Request $request): ?Response
@@ -323,7 +326,7 @@ public function getCacheKey(Request $request): string
         $uri = $request->getUri();
         $uri = substr($uri, \strlen($request->getScheme().'://'));
 
-        return 'md'.hash('sha256', $uri);
+        return 'md'.hash($this->hashAlgorithm, $uri);
     }
 
     /**
@@ -339,7 +342,7 @@ public function generateContentDigest(Response $response): ?string
             return null;
         }
 
-        return 'en'.hash('sha256', $response->getContent());
+        return 'en'.hash($this->hashAlgorithm, $response->getContent());
     }
 
     private function getVaryKey(array $vary, Request $request): string

tests/Psr6StoreTest.php

@@ -333,7 +333,12 @@ public function testVaryResponseDropsNonVaryingOne(): void
     public function testRegularCacheKey(): void
     {
         $request = Request::create('https://foobar.com/');
-        $expected = 'md'.hash('sha256', 'foobar.com/');
+        $expected = 'md'.hash(
+            version_compare(PHP_VERSION, '8.1.0', '>=')
+                ? 'xxh128'
+                : 'sha256',
+            'foobar.com/'
+        );
         $this->assertSame($expected, $this->store->getCacheKey($request));
     }
 
@@ -375,7 +380,11 @@ public function testRegularLookup(): void
         $this->assertSame('hello world', $result->getContent());
         $this->assertSame('whatever', $result->headers->get('Foobar'));
 
-        $this->assertSame('enb94d27b9934d3e08a52e52d7da7dabfac484efe37a5380ee9088f7ace2efcde9', $result->headers->get('X-Content-Digest'));
+        $this->assertSame(
+            version_compare(PHP_VERSION, '8.1.0', '>=')
+                ? 'endf8d09e93f874900a99b8775cc15b6c7' // xxh128
+                : 'enb94d27b9934d3e08a52e52d7da7dabfac484efe37a5380ee9088f7ace2efcde9' // sha256
+        , $result->headers->get('X-Content-Digest'));
     }
 
     public function testRegularLookupWithContentDigestsDisabled(): void
@@ -851,10 +860,25 @@ public function testContentDigestExpiresCorrectly(array $responseHeaders, $expec
             ->expects($this->exactly(3))
             ->method('getItem')
             ->withConsecutive(
-                ['enc3ab8ff13720e8ad9047dd39466b3c8974e592c2fa383d4a3960714caef0c4f2'], // content digest
-                ['md390aa862a7f27c16d72dd40967066969e7eb4b102c6215478a275766bf046665'], // meta
+                [
+                    // content digest
+                    version_compare(PHP_VERSION, '8.1.0', '>=')
+                        ? 'en3c9e102628997f44ac87b0b131c6992d' // xxh128
+                        : 'enc3ab8ff13720e8ad9047dd39466b3c8974e592c2fa383d4a3960714caef0c4f2' // sha256
+                ],
+                [
+                    // meta
+                    version_compare(PHP_VERSION, '8.1.0', '>=')
+                        ? 'md0d10c3ce367c3309e789ed924fa6b183' // xxh128
+                        : 'md390aa862a7f27c16d72dd40967066969e7eb4b102c6215478a275766bf046665' // sha256
+                ],
                 [Psr6Store::COUNTER_KEY], // write counter
-                ['md390aa862a7f27c16d72dd40967066969e7eb4b102c6215478a275766bf046665'] // meta again
+                [
+                    // meta again
+                    version_compare(PHP_VERSION, '8.1.0', '>=')
+                        ? 'md0d10c3ce367c3309e789ed924fa6b183' // xxh128
+                        : 'md390aa862a7f27c16d72dd40967066969e7eb4b102c6215478a275766bf046665' // sha256
+                ]
             )
             ->willReturnOnConsecutiveCalls($contentDigestCacheItem, $cacheItem, $cacheItem, $cacheItem);