Webdav: fully implements the controller and response

The controller is tested from real request scraped from apache mod_dav implementation. The requests were scraped using a wireshark-like tool. Those requests have been adapted to suit to our xml.

src/Bundle/ChillDocStoreBundle/Service/StoredObjectManager.php

@@ -57,6 +57,62 @@ final class StoredObjectManager implements StoredObjectManagerInterface
         return $this->extractLastModifiedFromResponse($response);
     }
 
+    public function getContentLength(StoredObject $document): int
+    {
+        if ([] === $document->getKeyInfos()) {
+            if ($this->hasCache($document)) {
+                $response = $this->getResponseFromCache($document);
+            } else {
+                try {
+                    $response = $this
+                        ->client
+                        ->request(
+                            Request::METHOD_HEAD,
+                            $this
+                                ->tempUrlGenerator
+                                ->generate(
+                                    Request::METHOD_HEAD,
+                                    $document->getFilename()
+                                )
+                                ->url
+                        );
+                } catch (TransportExceptionInterface $exception) {
+                    throw StoredObjectManagerException::errorDuringHttpRequest($exception);
+                }
+            }
+
+            return $this->extractContentLengthFromResponse($response);
+        }
+
+        return strlen($this->read($document));
+    }
+
+    public function etag(StoredObject $document): string
+    {
+        if ($this->hasCache($document)) {
+            $response = $this->getResponseFromCache($document);
+        } else {
+            try {
+                $response = $this
+                    ->client
+                    ->request(
+                        Request::METHOD_HEAD,
+                        $this
+                            ->tempUrlGenerator
+                            ->generate(
+                                Request::METHOD_HEAD,
+                                $document->getFilename()
+                            )
+                            ->url
+                    );
+            } catch (TransportExceptionInterface $exception) {
+                throw StoredObjectManagerException::errorDuringHttpRequest($exception);
+            }
+        }
+
+        return $this->extractEtagFromResponse($response, $document);
+    }
+
     public function read(StoredObject $document): string
     {
         $response = $this->getResponseFromCache($document);
@@ -158,6 +214,22 @@ final class StoredObjectManager implements StoredObjectManagerInterface
         return $date;
     }
 
+    private function extractContentLengthFromResponse(ResponseInterface $response): int
+    {
+        return (int) ($response->getHeaders()['content-length'] ?? ['0'])[0];
+    }
+
+    private function extractEtagFromResponse(ResponseInterface $response, StoredObject $storedObject): ?string
+    {
+        $etag = ($response->getHeaders()['etag'] ?? [''])[0];
+
+        if ('' === $etag) {
+            return null;
+        }
+
+        return $etag;
+    }
+
     private function fillCache(StoredObject $document): void
     {
         try {

src/Bundle/ChillDocStoreBundle/Service/StoredObjectManagerInterface.php

@@ -18,6 +18,8 @@ interface StoredObjectManagerInterface
 {
     public function getLastModified(StoredObject $document): \DateTimeInterface;
 
+    public function getContentLength(StoredObject $document): int;
+
     /**
      * Get the content of a StoredObject.
      *
@@ -39,5 +41,7 @@ interface StoredObjectManagerInterface
      */
     public function write(StoredObject $document, string $clearContent): void;
 
+    public function etag(StoredObject $document): string;
+
     public function clearCache(): void;
 }