Add ETag support to the Sabre file connector.

This is based on the md5 of the file, can be changed later

1 files changed, 19 insertions, 3 deletions

diff --git a/lib/connector/sabre/directory.php b/lib/connector/sabre/directory.php
index f3f6541a8d4..0842fc4fc65 100644
--- a/lib/connector/sabre/directory.php
+++ b/lib/connector/sabre/directory.php
@@ -26,17 +26,33 @@ class OC_Connector_Sabre_Directory extends OC_Connector_Sabre_Node implements Sa
 	/**
 	 * Creates a new file in the directory
 	 *
-	 * data is a readable stream resource
+	 * Data will either be supplied as a stream resource, or in certain cases
+	 * as a string. Keep in mind that you may have to support either.
+	 *
+	 * After succesful creation of the file, you may choose to return the ETag
+	 * of the new file here.
+	 *
+	 * The returned ETag must be surrounded by double-quotes (The quotes should
+	 * be part of the actual string).
+	 *
+	 * If you cannot accurately determine the ETag, you should not return it.
+	 * If you don't store the file exactly as-is (you're transforming it
+	 * somehow) you should also not return an ETag.
+	 *
+	 * This means that if a subsequent GET to this new file does not exactly
+	 * return the same contents of what was submitted here, you are strongly
+	 * recommended to omit the ETag.
 	 *
 	 * @param string $name Name of the file
-	 * @param resource $data Initial payload
-	 * @return void
+	 * @param resource|string $data Initial payload
+	 * @return null|string
 	 */
 	public function createFile($name, $data = null) {
 
 		$newPath = $this->path . '/' . $name;
 		OC_Filesystem::file_put_contents($newPath,$data);
 
+		return OC_Connector_Sabre_Node::getETagPropertyForFile($newPath);
 	}
 
 	/**