1 files changed, 233 insertions, 0 deletions
diff --git a/toolkit/mozapps/extensions/AddonPathService.cpp b/toolkit/mozapps/extensions/AddonPathService.cpp
new file mode 100644
index 000000000..006149100
--- /dev/null
+++ b/toolkit/mozapps/extensions/AddonPathService.cpp
@@ -0,0 +1,233 @@
+/* -*- Mode: C++; tab-width: 8; 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/. */
+
+#include "AddonPathService.h"
+
+#include "amIAddonManager.h"
+#include "nsIURI.h"
+#include "nsXULAppAPI.h"
+#include "jsapi.h"
+#include "nsServiceManagerUtils.h"
+#include "nsLiteralString.h"
+#include "nsThreadUtils.h"
+#include "nsIIOService.h"
+#include "nsNetUtil.h"
+#include "nsIFileURL.h"
+#include "nsIResProtocolHandler.h"
+#include "nsIChromeRegistry.h"
+#include "nsIJARURI.h"
+#include "nsJSUtils.h"
+#include "mozilla/dom/ScriptSettings.h"
+#include "mozilla/dom/ToJSValue.h"
+#include "mozilla/AddonPathService.h"
+#include "mozilla/Omnijar.h"
+
+#include <algorithm>
+
+namespace mozilla {
+
+struct PathEntryComparator
+{
+  typedef AddonPathService::PathEntry PathEntry;
+
+  bool Equals(const PathEntry& entry1, const PathEntry& entry2) const
+  {
+    return entry1.mPath == entry2.mPath;
+  }
+
+  bool LessThan(const PathEntry& entry1, const PathEntry& entry2) const
+  {
+    return entry1.mPath < entry2.mPath;
+  }
+};
+
+AddonPathService::AddonPathService()
+{
+}
+
+AddonPathService::~AddonPathService()
+{
+  sInstance = nullptr;
+}
+
+NS_IMPL_ISUPPORTS(AddonPathService, amIAddonPathService)
+
+AddonPathService *AddonPathService::sInstance;
+
+/* static */ AddonPathService*
+AddonPathService::GetInstance()
+{
+  if (!sInstance) {
+    sInstance = new AddonPathService();
+  }
+  NS_ADDREF(sInstance);
+  return sInstance;
+}
+
+static JSAddonId*
+ConvertAddonId(const nsAString& addonIdString)
+{
+  AutoSafeJSContext cx;
+  JS::RootedValue strv(cx);
+  if (!mozilla::dom::ToJSValue(cx, addonIdString, &strv)) {
+    return nullptr;
+  }
+  JS::RootedString str(cx, strv.toString());
+  return JS::NewAddonId(cx, str);
+}
+
+JSAddonId*
+AddonPathService::Find(const nsAString& path)
+{
+  // Use binary search to find the nearest entry that is <= |path|.
+  PathEntryComparator comparator;
+  unsigned index = mPaths.IndexOfFirstElementGt(PathEntry(path, nullptr), comparator);
+  if (index == 0) {
+    return nullptr;
+  }
+  const PathEntry& entry = mPaths[index - 1];
+
+  // Return the entry's addon if its path is a prefix of |path|.
+  if (StringBeginsWith(path, entry.mPath)) {
+    return entry.mAddonId;
+  }
+  return nullptr;
+}
+
+NS_IMETHODIMP
+AddonPathService::FindAddonId(const nsAString& path, nsAString& addonIdString)
+{
+  if (JSAddonId* id = Find(path)) {
+    JSFlatString* flat = JS_ASSERT_STRING_IS_FLAT(JS::StringOfAddonId(id));
+    AssignJSFlatString(addonIdString, flat);
+  }
+  return NS_OK;
+}
+
+/* static */ JSAddonId*
+AddonPathService::FindAddonId(const nsAString& path)
+{
+  // If no service has been created, then we're not going to find anything.
+  if (!sInstance) {
+    return nullptr;
+  }
+
+  return sInstance->Find(path);
+}
+
+NS_IMETHODIMP
+AddonPathService::InsertPath(const nsAString& path, const nsAString& addonIdString)
+{
+  JSAddonId* addonId = ConvertAddonId(addonIdString);
+
+  // Add the new path in sorted order.
+  PathEntryComparator comparator;
+  mPaths.InsertElementSorted(PathEntry(path, addonId), comparator);
+  return NS_OK;
+}
+
+static nsresult
+ResolveURI(nsIURI* aURI, nsAString& out)
+{
+  bool equals;
+  nsresult rv;
+  nsCOMPtr<nsIURI> uri;
+  nsAutoCString spec;
+
+  // Resolve resource:// URIs. At the end of this if/else block, we
+  // have both spec and uri variables identifying the same URI.
+  if (NS_SUCCEEDED(aURI->SchemeIs("resource", &equals)) && equals) {
+    nsCOMPtr<nsIIOService> ioService = do_GetIOService(&rv);
+    if (NS_WARN_IF(NS_FAILED(rv)))
+      return rv;
+
+    nsCOMPtr<nsIProtocolHandler> ph;
+    rv = ioService->GetProtocolHandler("resource", getter_AddRefs(ph));
+    if (NS_WARN_IF(NS_FAILED(rv)))
+      return rv;
+
+    nsCOMPtr<nsIResProtocolHandler> irph(do_QueryInterface(ph, &rv));
+    if (NS_WARN_IF(NS_FAILED(rv)))
+      return rv;
+
+    rv = irph->ResolveURI(aURI, spec);
+    if (NS_WARN_IF(NS_FAILED(rv)))
+      return rv;
+
+    rv = ioService->NewURI(spec, nullptr, nullptr, getter_AddRefs(uri));
+    if (NS_WARN_IF(NS_FAILED(rv)))
+      return rv;
+  } else if (NS_SUCCEEDED(aURI->SchemeIs("chrome", &equals)) && equals) {
+    nsCOMPtr<nsIChromeRegistry> chromeReg =
+      mozilla::services::GetChromeRegistryService();
+    if (NS_WARN_IF(!chromeReg))
+      return NS_ERROR_UNEXPECTED;
+
+    rv = chromeReg->ConvertChromeURL(aURI, getter_AddRefs(uri));
+    if (NS_WARN_IF(NS_FAILED(rv)))
+      return rv;
+  } else {
+    uri = aURI;
+  }
+
+  if (NS_SUCCEEDED(uri->SchemeIs("jar", &equals)) && equals) {
+    nsCOMPtr<nsIJARURI> jarURI = do_QueryInterface(uri, &rv);
+    if (NS_WARN_IF(NS_FAILED(rv)))
+      return rv;
+
+    nsCOMPtr<nsIURI> jarFileURI;
+    rv = jarURI->GetJARFile(getter_AddRefs(jarFileURI));
+    if (NS_WARN_IF(NS_FAILED(rv)))
+      return rv;
+
+    return ResolveURI(jarFileURI, out);
+  }
+
+  if (NS_SUCCEEDED(uri->SchemeIs("file", &equals)) && equals) {
+    nsCOMPtr<nsIFileURL> baseFileURL = do_QueryInterface(uri, &rv);
+    if (NS_WARN_IF(NS_FAILED(rv)))
+      return rv;
+
+    nsCOMPtr<nsIFile> file;
+    rv = baseFileURL->GetFile(getter_AddRefs(file));
+    if (NS_WARN_IF(NS_FAILED(rv)))
+      return rv;
+
+    return file->GetPath(out);
+  }
+  return NS_ERROR_FAILURE;
+}
+
+JSAddonId*
+MapURIToAddonID(nsIURI* aURI)
+{
+  if (!NS_IsMainThread() || !XRE_IsParentProcess()) {
+    return nullptr;
+  }
+
+  nsAutoString filePath;
+  nsresult rv = ResolveURI(aURI, filePath);
+  if (NS_FAILED(rv))
+    return nullptr;
+
+  nsCOMPtr<nsIFile> greJar = Omnijar::GetPath(Omnijar::GRE);
+  nsCOMPtr<nsIFile> appJar = Omnijar::GetPath(Omnijar::APP);
+  if (greJar && appJar) {
+    nsAutoString greJarString, appJarString;
+    if (NS_FAILED(greJar->GetPath(greJarString)) || NS_FAILED(appJar->GetPath(appJarString)))
+      return nullptr;
+
+    // If |aURI| is part of either Omnijar, then it can't be part of an
+    // add-on. This catches pretty much all URLs for Firefox content.
+    if (filePath.Equals(greJarString) || filePath.Equals(appJarString))
+      return nullptr;
+  }
+
+  // If it's not part of Firefox, we resort to binary searching through the
+  // add-on paths.
+  return AddonPathService::FindAddonId(filePath);
+}
+
+}