From 43db35ec5e5125055fa8ccfdef17d077a63f31f9 Mon Sep 17 00:00:00 2001
From: Michael Williamson <mike@zwobble.org>
Date: Sat, 27 Apr 2013 23:01:49 +0100
Subject: Read [Content_Types].xml to find content types of files

---
 lib/content-types-reader.js | 29 ++++++++++++++++++++++++++++-
 lib/office-xml-reader.js    |  3 ++-
 2 files changed, 30 insertions(+), 2 deletions(-)

(limited to 'lib')

diff --git a/lib/content-types-reader.js b/lib/content-types-reader.js
index 5240d21..0346b8c 100644
--- a/lib/content-types-reader.js
+++ b/lib/content-types-reader.js
@@ -1,10 +1,37 @@
+var readXmlFromZipFile = require("./office-xml-reader").readXmlFromZipFile;
+
 exports.readContentTypesFromZipFile = readContentTypesFromZipFile;
+exports.readContentTypesFromXml = readContentTypesFromXml;
 
 
 function readContentTypesFromZipFile(file) {
+    return readXmlFromZipFile(file, "[Content_Types].xml")
+        .then(function(xml) {
+            return xml ? readContentTypesFromXml(xml) : defaultContentTypes;
+        });
+}
+
+function readContentTypesFromXml(xml) {
+    var extensionDefaults = {};
+    
+    xml.root.children.forEach(function(child) {
+        if (child.name === "content-types:Default") {
+            extensionDefaults[child.attributes.Extension] = child.attributes.ContentType;
+        }
+    });
+    
     return {
         findContentType: function(path) {
-            return "image/png";
+            var pathParts = path.split(".");
+            var extension = pathParts[pathParts.length - 1];
+            return extensionDefaults[extension];
         }
     }
 }
+
+
+var defaultContentTypes = {
+    findContentType: function(path) {
+        return null;
+    }
+};
diff --git a/lib/office-xml-reader.js b/lib/office-xml-reader.js
index 7aa8bab..04b73fb 100644
--- a/lib/office-xml-reader.js
+++ b/lib/office-xml-reader.js
@@ -10,7 +10,8 @@ var xmlNamespaceMap = {
     "http://schemas.openxmlformats.org/officeDocument/2006/relationships": "r",
     "http://schemas.openxmlformats.org/drawingml/2006/wordprocessingDrawing": "wp",
     "http://schemas.openxmlformats.org/drawingml/2006/main": "a",
-    "http://schemas.openxmlformats.org/drawingml/2006/picture": "pic"
+    "http://schemas.openxmlformats.org/drawingml/2006/picture": "pic",
+    "http://schemas.openxmlformats.org/package/2006/content-types": "content-types"
 };
 
 
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