Merge pull request #61 from blizzz/sp_save_file_add_digest

Add digest to file save request, SP refuses the operation otherwise

Author: vgrem

src/SharePoint/File.php

@@ -159,6 +159,9 @@ public static function saveBinary(ClientRuntimeContext $ctx, $serverRelativeUrl,
          $request->Method = HttpMethod::Post;
          $request->addCustomHeader('X-HTTP-Method','PUT');
          $request->Data = $content;
+         if($ctx instanceof ClientContext) {
+             $ctx->ensureFormDigest($request);
+         }
          $ctx->executeQueryDirect($request);
      }
 
@@ -245,4 +248,4 @@ function setProperty($name, $value, $persistChanges = true)
              $this->setResourceUrl("Web/GetFileById(guid'{$value}')");
          }
      }
-}
+}