Throw more informative error when word/document.xml cannot be found

1 files changed, 12 insertions, 8 deletions

diff --git a/lib/docx/docx-reader.js b/lib/docx/docx-reader.js
index 57830d7..0c7d57f 100644
--- a/lib/docx/docx-reader.js
+++ b/lib/docx/docx-reader.js
@@ -60,16 +60,20 @@ function read(docxFile, input) {
         };
     }).then(function(result) {
         return readXmlFileWithBody("document", result, function(bodyReader, xml) {
-            return result.notes.flatMap(function(notes) {
-                return result.comments.flatMap(function(comments) {
-                    var reader = new DocumentXmlReader({
-                        bodyReader: bodyReader,
-                        notes: notes,
-                        comments: comments
+            if (xml) {
+                return result.notes.flatMap(function(notes) {
+                    return result.comments.flatMap(function(comments) {
+                        var reader = new DocumentXmlReader({
+                            bodyReader: bodyReader,
+                            notes: notes,
+                            comments: comments
+                        });
+                        return reader.convertXmlToDocument(xml);
                     });
-                    return reader.convertXmlToDocument(xml);
                 });
-            });
+            } else {
+                throw new Error("Could not find word/document.xml in ZIP file. Are you sure this is a valid .docx file?");
+            }
         });
     });
 }