enchance error builder: output body only for json, limit body to 5 Kb (#405)

fixes #403
supersedes #404

Author: k0ka

src/Common/Error/Builder.php

@@ -19,6 +19,8 @@
  */
 class Builder
 {
+    public const MAX_BODY_LENGTH = 5000;
+
     /**
      * The default domain to use for further link documentation.
      *
@@ -96,8 +98,13 @@ public function str(MessageInterface $message, int $verbosity = 0): string
             return $msg;
         }
 
-        if (ini_get('memory_limit') < 0 || $message->getBody()->getSize() < ini_get('memory_limit')) {
-            $msg .= "\r\n\r\n".$message->getBody();
+        $contentType = strtolower($message->getHeaderLine('content-type'));
+        if (false !== strpos($contentType, 'application/json')) {
+            $body = $message->getBody()->read(self::MAX_BODY_LENGTH);
+            $msg .= "\r\n\r\n".$body;
+            if ('' !== $message->getBody()->read(1)) {
+                $msg .= '...';
+            }
         }
 
         return trim($msg);

tests/sample/Compute/v2/ServerTest.php

@@ -374,6 +374,9 @@ public function testSuspend()
         $server->waitUntil('SUSPENDED');
         $this->assertEquals('SUSPENDED', $server->status);
 
+        // wait for the server to be fully suspended
+        sleep(5);
+
         return $server;
     }
 

tests/unit/Common/Error/BuilderTest.php

@@ -4,6 +4,8 @@
 
 use GuzzleHttp\ClientInterface;
 use GuzzleHttp\Exception\ClientException;
+use GuzzleHttp\Psr7\NoSeekStream;
+use GuzzleHttp\Psr7\PumpStream;
 use GuzzleHttp\Psr7\Request;
 use GuzzleHttp\Psr7\Response;
 use GuzzleHttp\Psr7\Utils;
@@ -75,6 +77,85 @@ public function verbosityProvider(): array
         ];
     }
 
+    public function test_it_outputs_body_for_json()
+    {
+        $value = 'foobar';
+
+        $request = new Request(
+            'POST',
+            '/servers',
+            ['Content-Type' => 'application/json'],
+            json_encode(['foo' => $value])
+        );
+
+        $str = $this->builder->str($request, 2);
+        $this->assertStringContainsString($value, $str);
+    }
+
+    public function test_it_skips_body_for_low_verbosity()
+    {
+        $value = 'foobar';
+
+        $request = new Request(
+            'POST',
+            '/servers',
+            ['Content-Type' => 'application/json'],
+            json_encode(['foo' => $value])
+        );
+
+        $str = $this->builder->str($request, 1);
+        $this->assertStringNotContainsString($value, $str);
+    }
+
+    public function test_it_cuts_big_body_for_json()
+    {
+        $value = str_repeat('A', Builder::MAX_BODY_LENGTH);
+
+        $request = new Request(
+            'POST',
+            '/servers',
+            ['Content-Type' => 'application/json'],
+            json_encode(['foo' => $value])
+        );
+
+        $str = $this->builder->str($request, 2);
+        $this->assertStringNotContainsString($value, $str);
+        $this->assertStringContainsString('AAAAAA...', $str);
+    }
+
+    public function test_it_did_not_read_full_body_for_json()
+    {
+        $value = str_repeat('A', Builder::MAX_BODY_LENGTH + 1);
+
+        $request = new Request(
+            'POST',
+            '/servers',
+            ['Content-Type' => 'application/json'],
+            new PumpStream(function ($size) {
+                return str_repeat('A', $size);
+            })
+        );
+
+        $str = $this->builder->str($request, 2);
+        $this->assertStringNotContainsString($value, $str);
+        $this->assertStringContainsString('AAAAAA...', $str);
+    }
+
+    public function test_it_skips_body_for_binary()
+    {
+        $value = 'foobar';
+
+        $request = new Request(
+            'POST',
+            '/servers',
+            ['Content-Type' => 'binary/octet-stream'],
+            $value
+        );
+
+        $str = $this->builder->str($request, 2);
+        $this->assertStringNotContainsString($value, $str);
+    }
+
     public function test_it_builds_user_input_errors()
     {
         $expected = 'A well-formed string';