From 49af56f73069d50fb5160cefdb4bf1f38f737cb9 Mon Sep 17 00:00:00 2001
From: Rob Wu <rob@robwu.nl>
Date: Wed, 22 Mar 2017 14:55:59 +0100
Subject: [PATCH] Rethrow MissingDataException when needed

In core/document.js: `PDFDocument.prototype.parse` accesses a dictionary
property, which could throw if the underlying data is not yet available.

In core/obj.js: `get Catalog.prototype.metadata` calls
`stream.getBytes`, which can throw MissingDataException too when the
stream is a ChunkedStream.
---
 src/core/document.js | 3 +++
 src/core/obj.js      | 3 +++
 2 files changed, 6 insertions(+)

diff --git a/src/core/document.js b/src/core/document.js
index 69524e480..716b9a21d 100644
--- a/src/core/document.js
+++ b/src/core/document.js
@@ -467,6 +467,9 @@ var PDFDocument = (function PDFDocumentClosure() {
           }
         }
       } catch (ex) {
+        if (ex instanceof MissingDataException) {
+          throw ex;
+        }
         info('Something wrong with AcroForm entry');
         this.acroForm = null;
       }
diff --git a/src/core/obj.js b/src/core/obj.js
index c17da2c67..577631801 100644
--- a/src/core/obj.js
+++ b/src/core/obj.js
@@ -104,6 +104,9 @@ var Catalog = (function CatalogClosure() {
           try {
             metadata = stringToUTF8String(bytesToString(stream.getBytes()));
           } catch (e) {
+            if (e instanceof MissingDataException) {
+              throw e;
+            }
             info('Skipping invalid metadata.');
           }
         }