Fix Guzzle regression: Error log was truncated / http exception not caught

Guzzle 7 renamed the option that disables automatic exception throwing for
4xx/5xx responses from 'exceptions' to 'http_errors'.
The old key was silently ignored, leaving Guzzle's httpErrors middleware active.
This caused GuzzleHttp\Exception\ClientException to be thrown for any non-2xx response instead of returning the response object for the caller to inspect.

In practice this meant that a 400 Bad Request from the attribute aggregation
API (AA) was never caught by AttributeAggregator's HttpException handler and
propagated as an uncaught CRITICAL-level exception. The exception message
was truncated in the logs because Guzzle's BodySummarizer only includes the
first 120 characters of the response body when building the ClientException
message string.

Author: johanib

src/OpenConext/EngineBlock/Http/HttpClient.php

@@ -53,7 +53,7 @@ public function read($path, array $parameters = [], array $headers = [])
     {
         $resource = ResourcePathFormatter::format($path, $parameters);
         $response = $this->httpClient->request('GET', $resource, [
-            'exceptions' => false,
+            'http_errors' => false,
             'headers' => $headers
         ]);
         $statusCode = $response->getStatusCode();
@@ -93,7 +93,7 @@ public function post($data, $path, $parameters = [], array $headers = [], bool $
     {
         $resource = ResourcePathFormatter::format($path, $parameters);
         $response = $this->httpClient->request('POST', $resource, [
-            'exceptions' => false,
+            'http_errors' => false,
             'body' => $data,
             'headers' => $headers,
             'verify' => $verify,

tests/unit/OpenConext/EngineBlock/Http/HttpClientTest.php

@@ -40,10 +40,12 @@
 
 use GuzzleHttp\Client;
 use GuzzleHttp\Handler\MockHandler;
+use GuzzleHttp\HandlerStack;
 use GuzzleHttp\Psr7\Response;
 use Mockery\Adapter\Phpunit\MockeryPHPUnitIntegration;
 use OpenConext\EngineBlock\Http\Exception\AccessDeniedException;
 use OpenConext\EngineBlock\Http\Exception\MalformedResponseException;
+use OpenConext\EngineBlock\Http\Exception\UnreadableResourceException;
 use PHPUnit\Framework\Attributes\Group;
 use PHPUnit\Framework\Attributes\Test;
 use PHPUnit\Framework\TestCase;
@@ -196,4 +198,36 @@ public function an_access_denied_exception_is_thrown_if_the_response_status_code
 
         $client->post('post-and-give-me/403', 'Post body');
     }
+
+    #[Group('EngineBlock')]
+    #[Group('Http')]
+    #[Test]
+    public function an_unreadable_resource_exception_is_thrown_if_the_response_status_code_is_400_when_reading()
+    {
+        $mockHandler = new MockHandler([
+            new Response(400, [], '{"error":"Bad Request"}')
+        ]);
+        $guzzle = new Client(['handler' => HandlerStack::create($mockHandler)]);
+        $client = new HttpClient($guzzle);
+
+        $this->expectException(UnreadableResourceException::class);
+
+        $client->read('/some-resource');
+    }
+
+    #[Group('EngineBlock')]
+    #[Group('Http')]
+    #[Test]
+    public function an_unreadable_resource_exception_is_thrown_if_the_response_status_code_is_400_when_posting()
+    {
+        $mockHandler = new MockHandler([
+            new Response(400, [], '{"error":"Bad Request"}')
+        ]);
+        $guzzle = new Client(['handler' => HandlerStack::create($mockHandler)]);
+        $client = new HttpClient($guzzle);
+
+        $this->expectException(UnreadableResourceException::class);
+
+        $client->post('{"id":1}', '/some-resource');
+    }
 }