diff --git a/static/js/directives/odfcanvas.js b/static/js/directives/odfcanvas.js
index 96b24691..5237a32c 100644
--- a/static/js/directives/odfcanvas.js
+++ b/static/js/directives/odfcanvas.js
@@ -54,6 +54,38 @@ define(['require', 'underscore', 'jquery'], function(require, _, $) {
 			console.error("TODO(fancycode): implement read for", path);
 		};
 
+		var ODFCanvas_readFile = function(path, encoding, callback) {
+			if (typeof path === "string") {
+				webodf.runtime.orig_readFile.call(webodf.runtime, path, encoding, callback);
+				return;
+			}
+
+			var fp = path.file || path;
+			if (typeof URL !== "undefined" && URL.createObjectURL) {
+				var url = URL.createObjectURL(fp);
+				webodf.runtime.orig_readFile.call(webodf.runtime, url, encoding, callback);
+				return;
+			}
+
+			console.error("TODO(fancycode): implement readFile for", path);
+		};
+
+		var ODFCanvas_loadXML = function(path, callback) {
+			if (typeof path === "string") {
+				webodf.runtime.orig_loadXML.call(webodf.runtime, path, callback);
+				return;
+			}
+
+			var fp = path.file || path;
+			if (typeof URL !== "undefined" && URL.createObjectURL) {
+				var url = URL.createObjectURL(fp);
+				webodf.runtime.orig_loadXML.call(webodf.runtime, url, callback);
+				return;
+			}
+
+			console.error("TODO(fancycode): implement loadXML for", path);
+		};
+
 		var ODFCanvas_getFileSize = function(path, callback) {
 			if (typeof path === "string") {
 				webodf.runtime.orig_getFileSize.call(webodf.runtime, path, callback);
@@ -162,6 +194,10 @@ define(['require', 'underscore', 'jquery'], function(require, _, $) {
 						// monkey-patch IO functions
 						webodf.runtime.orig_read = webodf.runtime.read;
 						webodf.runtime.read = ODFCanvas_read;
+						webodf.runtime.orig_readFile = webodf.runtime.readFile;
+						webodf.runtime.readFile = ODFCanvas_readFile;
+						webodf.runtime.orig_loadXML = webodf.runtime.loadXML;
+						webodf.runtime.loadXML = ODFCanvas_loadXML;
 						webodf.runtime.orig_getFileSize = webodf.runtime.getFileSize;
 						webodf.runtime.getFileSize = ODFCanvas_getFileSize;