Allow for additional headers sent with curl() HTTP requests to be set in ManagedInstalls.plist

git-svn-id: http://munki.googlecode.com/svn/branches/additional-http-headers@734 a4e17f2e-e282-11dd-95e1-755cbddbdd66

code/client/munkilib/updatecheck.py

@@ -1058,8 +1058,8 @@ def verifySoftwarePackageIntegrity(manifestitem, file_path, item_pl, item_key):
         none: No integrity check is performed.
         hash: Integrity check is performed by calcualting a SHA-256 hash of
             the given file and comparing it against the reference value in
-            catalog. Only applies for package plists that contain the 
-            item_key; for packages without the item_key, verifcation always 
+            catalog. Only applies for package plists that contain the
+            item_key; for packages without the item_key, verifcation always
             returns True.
         hash_strict: Same as hash, but returns False for package plists that
             do not contain the item_key.
@@ -2169,6 +2169,18 @@ def curl(url, destinationpath, onlyifnewer=False, etag=None, resume=False,
             else:
                 os.remove(destinationpath)
 
+        # Add any additional headers specified in ManagedInstalls.plist.
+        # AdditionalHttpHeaders must be an array of strings with valid HTTP
+        # header format: "Key-With-Optional-Dashes: Value here"
+        custom_headers = munkicommon.pref('AdditionalHttpHeaders')
+        if custom_headers:
+            for custom_header in custom_headers:
+                if re.search(r'^[\w-]+:.+', custom_header):
+                    print >> fileobj, ('header = "%s"' % custom_header)
+                else:
+                    munkicommon.display_warning(
+                        "Skipping invalid HTTP header: %s" % custom_header)
+
         fileobj.close()
     except:
         raise CurlError(-5, "Error writing curl directive")