Merge pull request #127 from marcoslois/master

Fix InflateStream not preserving isSeekable.

Author: sagikazarmark

src/InflateStream.php

@@ -27,7 +27,7 @@ public function __construct(StreamInterface $stream)
         $stream = new LimitStream($stream, -1, 10 + $filenameHeaderLength);
         $resource = StreamWrapper::getResource($stream);
         stream_filter_append($resource, 'zlib.inflate', STREAM_FILTER_READ);
-        $this->stream = new Stream($resource);
+        $this->stream = $stream->isSeekable() ? new Stream($resource) : new NoSeekStream(new Stream($resource));
     }
 
     /**

tests/InflateStreamTest.php

@@ -3,6 +3,7 @@
 
 use GuzzleHttp\Psr7;
 use GuzzleHttp\Psr7\InflateStream;
+use GuzzleHttp\Psr7\NoSeekStream;
 
 class InflateStreamtest extends \PHPUnit_Framework_TestCase
 {
@@ -22,6 +23,16 @@ public function testInflatesStreamsWithFilename()
         $this->assertEquals('test', (string) $b);
     }
 
+    public function testInflatesStreamsPreserveSeekable()
+    {
+        $content = $this->getGzipStringWithFilename('test');
+        $seekable = Psr7\stream_for($content);
+        $nonSeekable = new NoSeekStream(Psr7\stream_for($content));
+
+        $this->assertTrue((new InflateStream($seekable))->isSeekable());
+        $this->assertFalse((new InflateStream($nonSeekable))->isSeekable());
+    }
+
     private function getGzipStringWithFilename($original_string)
     {
         $gzipped = bin2hex(gzencode($original_string));