Lay down Pale Moon 30

1 files changed, 165 insertions, 0 deletions

diff --git a/browser/components/sessionstore/SessionStorage.jsm b/browser/components/sessionstore/SessionStorage.jsm
new file mode 100644
index 000000000..8016d34bc
--- /dev/null
+++ b/browser/components/sessionstore/SessionStorage.jsm
@@ -0,0 +1,165 @@
+/* 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/. */
+
+this.EXPORTED_SYMBOLS = ["SessionStorage"];
+
+const Cu = Components.utils;
+
+Cu.import("resource://gre/modules/Services.jsm");
+Cu.import("resource://gre/modules/XPCOMUtils.jsm");
+
+XPCOMUtils.defineLazyModuleGetter(this, "SessionStore",
+  "resource:///modules/sessionstore/SessionStore.jsm");
+
+this.SessionStorage = {
+  /**
+   * Updates all sessionStorage "super cookies"
+   * @param aDocShell
+   *        That tab's docshell (containing the sessionStorage)
+   * @param aFullData
+   *        always return privacy sensitive data (use with care)
+   */
+  serialize: function(aDocShell, aFullData) {
+    return DomStorage.read(aDocShell, aFullData);
+  },
+
+  /**
+   * Restores all sessionStorage "super cookies".
+   * @param aDocShell
+   *        A tab's docshell (containing the sessionStorage)
+   * @param aStorageData
+   *        Storage data to be restored
+   */
+  deserialize: function(aDocShell, aStorageData) {
+    DomStorage.write(aDocShell, aStorageData);
+  }
+};
+
+Object.freeze(SessionStorage);
+
+var DomStorage = {
+  /**
+   * Reads all session storage data from the given docShell.
+   * @param aDocShell
+   *        A tab's docshell (containing the sessionStorage)
+   * @param aFullData
+   *        Always return privacy sensitive data (use with care)
+   */
+  read: function(aDocShell, aFullData) {
+    let data = {};
+    let isPinned = aDocShell.isAppTab;
+    let shistory = aDocShell.sessionHistory;
+
+    for (let i = 0; i < shistory.count; i++) {
+      let principal = History.getPrincipalForEntry(shistory, i, aDocShell);
+      if (!principal)
+        continue;
+
+      // Check if we're allowed to store sessionStorage data.
+      let isHTTPS = principal.URI && principal.URI.schemeIs("https");
+      if (aFullData || SessionStore.checkPrivacyLevel(isHTTPS, isPinned)) {
+        let origin = principal.extendedOrigin;
+
+        // Don't read a host twice.
+        if (!(origin in data)) {
+          let originData = this._readEntry(principal, aDocShell);
+          if (Object.keys(originData).length) {
+            data[origin] = originData;
+          }
+        }
+      }
+    }
+
+    return data;
+  },
+
+  /**
+   * Writes session storage data to the given tab.
+   * @param aDocShell
+   *        A tab's docshell (containing the sessionStorage)
+   * @param aStorageData
+   *        Storage data to be restored
+   */
+  write: function(aDocShell, aStorageData) {
+    for (let [host, data] in Iterator(aStorageData)) {
+      let uri = Services.io.newURI(host, null, null);
+      let principal = Services.scriptSecurityManager.getDocShellCodebasePrincipal(uri, aDocShell);
+      let storageManager = aDocShell.QueryInterface(Components.interfaces.nsIDOMStorageManager);
+      let window = aDocShell.QueryInterface(Components.interfaces.nsIInterfaceRequestor)
+                            .getInterface(Components.interfaces.nsIDOMWindow);
+
+      // There is no need to pass documentURI, it's only used to fill documentURI property of
+      // domstorage event, which in this case has no consumer.  Prevention of events in case
+      // of missing documentURI will be solved in a followup bug to bug 600307.
+      try {
+        let storage = storageManager.createStorage(window, principal, "", aDocShell.usePrivateBrowsing);
+      } catch(e) {
+        Cu.reportError(e);
+      }
+
+      for (let [key, value] in Iterator(data)) {
+        try {
+          storage.setItem(key, value);
+        } catch (e) {
+          // throws e.g. for URIs that can't have sessionStorage
+          Cu.reportError(e);
+        }
+      }
+    }
+  },
+
+  /**
+   * Reads an entry in the session storage data contained in a tab's history.
+   * @param aURI
+   *        That history entry uri
+   * @param aDocShell
+   *        A tab's docshell (containing the sessionStorage)
+   */
+  _readEntry: function(aPrincipal, aDocShell) {
+    let hostData = {};
+    let storage;
+
+    try {
+      let storageManager = aDocShell.QueryInterface(Components.interfaces.nsIDOMStorageManager);
+      storage = storageManager.getStorage(aPrincipal);
+    } catch (e) {
+      // sessionStorage might throw if it's turned off, see bug 458954
+    }
+
+    if (storage && storage.length) {
+       for (let i = 0; i < storage.length; i++) {
+        try {
+          let key = storage.key(i);
+          hostData[key] = storage.getItem(key);
+        } catch (e) {
+          // This currently throws for secured items (cf. bug 442048).
+        }
+      }
+    }
+
+    return hostData;
+  }
+};
+
+var History = {
+  /**
+   * Returns a given history entry's URI.
+   * @param aHistory
+   *        That tab's session history
+   * @param aIndex
+   *        The history entry's index
+   * @param aDocShell
+   *        That tab's docshell
+   */
+  getPrincipalForEntry: function(aHistory,
+                                                              aIndex,
+                                                              aDocShell) {
+    try {
+      return Services.scriptSecurityManager.getDocShellCodebasePrincipal(
+        aHistory.getEntryAtIndex(aIndex, false).URI, aDocShell);
+    } catch (e) {
+      // This might throw for some reason.
+    }
+  },
+};