diff -r 000000000000 -r 6474c204b198 uriloader/exthandler/unix/nsOSHelperAppService.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/uriloader/exthandler/unix/nsOSHelperAppService.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,128 @@
+/* -*- Mode: C++; tab-width: 3; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef nsOSHelperAppService_h__
+#define nsOSHelperAppService_h__
+
+// The OS helper app service is a subclass of nsExternalHelperAppService and is implemented on each
+// platform. It contains platform specific code for finding helper applications for a given mime type
+// in addition to launching those applications.
+
+#include "nsExternalHelperAppService.h"
+#include "nsCExternalHandlerService.h"
+#include "nsMIMEInfoImpl.h"
+#include "nsCOMPtr.h"
+
+class nsILineInputStream;
+
+class nsOSHelperAppService : public nsExternalHelperAppService
+{
+public:
+  nsOSHelperAppService();
+  virtual ~nsOSHelperAppService();
+
+  // method overrides for mime.types and mime.info look up steps
+  already_AddRefed<nsIMIMEInfo> GetMIMEInfoFromOS(const nsACString& aMimeType,
+                                                  const nsACString& aFileExt,
+                                                  bool       *aFound);
+  NS_IMETHOD GetProtocolHandlerInfoFromOS(const nsACString &aScheme,
+                                          bool *found,
+                                          nsIHandlerInfo **_retval);
+
+  // override nsIExternalProtocolService methods
+  nsresult OSProtocolHandlerExists(const char * aProtocolScheme, bool * aHandlerExists);
+  NS_IMETHOD GetApplicationDescription(const nsACString& aScheme, nsAString& _retval);
+
+  // GetFileTokenForPath must be implemented by each platform.
+  // platformAppPath --> a platform specific path to an application that we got out of the
+  //                     rdf data source. This can be a mac file spec, a unix path or a windows path depending on the platform
+  // aFile --> an nsIFile representation of that platform application path.
+  virtual nsresult GetFileTokenForPath(const char16_t * platformAppPath, nsIFile ** aFile);
+
+protected:
+  already_AddRefed<nsMIMEInfoBase> GetFromType(const nsCString& aMimeType);
+  already_AddRefed<nsMIMEInfoBase> GetFromExtension(const nsCString& aFileExt);
+
+private:
+  uint32_t mPermissions;
+
+  // Helper methods which have to access static members
+  static nsresult UnescapeCommand(const nsAString& aEscapedCommand,
+                                  const nsAString& aMajorType,
+                                  const nsAString& aMinorType,
+                                  nsACString& aUnEscapedCommand);
+  static nsresult GetFileLocation(const char* aPrefName,
+                                  const char* aEnvVarName,
+                                  nsAString& aFileLocation);
+  static nsresult LookUpTypeAndDescription(const nsAString& aFileExtension,
+                                           nsAString& aMajorType,
+                                           nsAString& aMinorType,
+                                           nsAString& aDescription,
+                                           bool aUserData);
+  static nsresult CreateInputStream(const nsAString& aFilename,
+                                    nsIFileInputStream ** aFileInputStream,
+                                    nsILineInputStream ** aLineInputStream,
+                                    nsACString& aBuffer,
+                                    bool * aNetscapeFormat,
+                                    bool * aMore);
+
+  static nsresult GetTypeAndDescriptionFromMimetypesFile(const nsAString& aFilename,
+                                                         const nsAString& aFileExtension,
+                                                         nsAString& aMajorType,
+                                                         nsAString& aMinorType,
+                                                         nsAString& aDescription);
+
+  static nsresult LookUpExtensionsAndDescription(const nsAString& aMajorType,
+                                                 const nsAString& aMinorType,
+                                                 nsAString& aFileExtensions,
+                                                 nsAString& aDescription);
+
+  static nsresult GetExtensionsAndDescriptionFromMimetypesFile(const nsAString& aFilename,
+                                                               const nsAString& aMajorType,
+                                                               const nsAString& aMinorType,
+                                                               nsAString& aFileExtensions,
+                                                               nsAString& aDescription);
+
+  static nsresult ParseNetscapeMIMETypesEntry(const nsAString& aEntry,
+                                              nsAString::const_iterator& aMajorTypeStart,
+                                              nsAString::const_iterator& aMajorTypeEnd,
+                                              nsAString::const_iterator& aMinorTypeStart,
+                                              nsAString::const_iterator& aMinorTypeEnd,
+                                              nsAString& aExtensions,
+                                              nsAString::const_iterator& aDescriptionStart,
+                                              nsAString::const_iterator& aDescriptionEnd);
+
+  static nsresult ParseNormalMIMETypesEntry(const nsAString& aEntry,
+                                            nsAString::const_iterator& aMajorTypeStart,
+                                            nsAString::const_iterator& aMajorTypeEnd,
+                                            nsAString::const_iterator& aMinorTypeStart,
+                                            nsAString::const_iterator& aMinorTypeEnd,
+                                            nsAString& aExtensions,
+                                            nsAString::const_iterator& aDescriptionStart,
+                                            nsAString::const_iterator& aDescriptionEnd);
+
+  static nsresult LookUpHandlerAndDescription(const nsAString& aMajorType,
+                                              const nsAString& aMinorType,
+                                              nsAString& aHandler,
+                                              nsAString& aDescription,
+                                              nsAString& aMozillaFlags);
+
+  static nsresult DoLookUpHandlerAndDescription(const nsAString& aMajorType,
+                                                const nsAString& aMinorType,
+                                                nsAString& aHandler,
+                                                nsAString& aDescription,
+                                                nsAString& aMozillaFlags,
+                                                bool aUserData);
+
+  static nsresult GetHandlerAndDescriptionFromMailcapFile(const nsAString& aFilename,
+                                                          const nsAString& aMajorType,
+                                                          const nsAString& aMinorType,
+                                                          nsAString& aHandler,
+                                                          nsAString& aDescription,
+                                                          nsAString& aMozillaFlags);
+};
+
+#endif // nsOSHelperAppService_h__