[tbb-commits] [tor-browser/tor-browser-52.6.0esr-8.0-2] Bug 1005640 - Flush StringBundle cache when app-locales change. r=valentin

[gk at torproject.org]

commit 0445d514609fd71e1aad90f67af8355825cda929
Author: Zibi Braniecki <gandalf at mozilla.com>
Date:   Tue Apr 18 01:03:05 2017 -0700

    Bug 1005640 - Flush StringBundle cache when app-locales change. r=valentin
    
    StringBundle caches bundles, so when language chain changes we should
    flush the cache to enable new strings to be loaded.
    This also affects localized prefs like intl.accept_languages.
    
    Then in HttpHandler we have to mark the value as dirty so that next
    time it's called it actually recalculates using flushed string bundle
    with the new locale.
    
    MozReview-Commit-ID: DKWEDUli4yH
    
    --HG--
    extra : rebase_source : 75ecc4204deca066d7492d1494492a91685f36be
    
    This fixes bug 22659 on our side.
---
 intl/strres/nsStringBundle.cpp          |  4 +++-
 netwerk/protocol/http/nsHttpHandler.cpp | 34 +++++++++++++++++++--------------
 netwerk/protocol/http/nsHttpHandler.h   |  3 ++-
 3 files changed, 25 insertions(+), 16 deletions(-)

diff --git a/intl/strres/nsStringBundle.cpp b/intl/strres/nsStringBundle.cpp
index ab840a469a4c..a763ba228b66 100644
--- a/intl/strres/nsStringBundle.cpp
+++ b/intl/strres/nsStringBundle.cpp
@@ -529,6 +529,7 @@ nsStringBundleService::Init()
     os->AddObserver(this, "profile-do-change", true);
     os->AddObserver(this, "chrome-flush-caches", true);
     os->AddObserver(this, "xpcom-category-entry-added", true);
+    os->AddObserver(this, "intl:app-locales-changed", true);
   }
 
   // instantiate the override service, if there is any.
@@ -546,7 +547,8 @@ nsStringBundleService::Observe(nsISupports* aSubject,
 {
   if (strcmp("memory-pressure", aTopic) == 0 ||
       strcmp("profile-do-change", aTopic) == 0 ||
-      strcmp("chrome-flush-caches", aTopic) == 0)
+      strcmp("chrome-flush-caches", aTopic) == 0 ||
+      strcmp("intl:app-locales-changed", aTopic) == 0)
   {
     flushBundleCache();
   }
diff --git a/netwerk/protocol/http/nsHttpHandler.cpp b/netwerk/protocol/http/nsHttpHandler.cpp
index 4276c7144eb3..21ce43d35fd5 100644
--- a/netwerk/protocol/http/nsHttpHandler.cpp
+++ b/netwerk/protocol/http/nsHttpHandler.cpp
@@ -203,6 +203,7 @@ nsHttpHandler::nsHttpHandler()
     , mProduct("Gecko")
     , mCompatFirefoxEnabled(false)
     , mUserAgentIsDirty(true)
+    , mAcceptLanguagesIsDirty(true)
     , mPromptTempRedirect(true)
     , mEnablePersistentHttpsCaching(false)
     , mDoNotTrackEnabled(false)
@@ -466,8 +467,13 @@ nsHttpHandler::AddStandardRequestHeaders(nsHttpRequestHead *request, bool isSecu
 
     // Add the "Accept-Language" header.  This header is also exposed to the
     // service worker.
+    if (mAcceptLanguagesIsDirty) {
+        rv = SetAcceptLanguages();
+        MOZ_ASSERT(NS_SUCCEEDED(rv));
+    }
+
+    // Add the "Accept-Language" header
     if (!mAcceptLanguages.IsEmpty()) {
-        // Add the "Accept-Language" header
         rv = request->SetHeader(nsHttp::Accept_Language, mAcceptLanguages,
                                 false,
                                 nsHttpHeaderArray::eVarietyRequestOverride);
@@ -1484,16 +1490,10 @@ nsHttpHandler::PrefsChanged(nsIPrefBranch *prefs, const char *pref)
     //
 
     if (PREF_CHANGED(INTL_ACCEPT_LANGUAGES)) {
-        nsCOMPtr<nsIPrefLocalizedString> pls;
-        prefs->GetComplexValue(INTL_ACCEPT_LANGUAGES,
-                                NS_GET_IID(nsIPrefLocalizedString),
-                                getter_AddRefs(pls));
-        if (pls) {
-            nsXPIDLString uval;
-            pls->ToString(getter_Copies(uval));
-            if (uval)
-                SetAcceptLanguages(NS_ConvertUTF16toUTF8(uval).get());
-        }
+        // We don't want to set the new accept languages here since
+        // this pref is a complex type and it may be racy with flushing
+        // string resources.
+        mAcceptLanguagesIsDirty = true;
     }
 
     //
@@ -1870,12 +1870,18 @@ PrepareAcceptLanguages(const char *i_AcceptLanguages, nsACString &o_AcceptLangua
 }
 
 nsresult
-nsHttpHandler::SetAcceptLanguages(const char *aAcceptLanguages)
+nsHttpHandler::SetAcceptLanguages()
 {
+    mAcceptLanguagesIsDirty = false;
+
+    const nsAdoptingCString& acceptLanguages =
+        Preferences::GetLocalizedCString(INTL_ACCEPT_LANGUAGES);
+
     nsAutoCString buf;
-    nsresult rv = PrepareAcceptLanguages(aAcceptLanguages, buf);
-    if (NS_SUCCEEDED(rv))
+    nsresult rv = PrepareAcceptLanguages(acceptLanguages.get(), buf);
+    if (NS_SUCCEEDED(rv)) {
         mAcceptLanguages.Assign(buf);
+    }
     return rv;
 }
 
diff --git a/netwerk/protocol/http/nsHttpHandler.h b/netwerk/protocol/http/nsHttpHandler.h
index 155740f3d223..bb30afc500f8 100644
--- a/netwerk/protocol/http/nsHttpHandler.h
+++ b/netwerk/protocol/http/nsHttpHandler.h
@@ -393,7 +393,7 @@ private:
     void     PrefsChanged(nsIPrefBranch *prefs, const char *pref);
 
     nsresult SetAccept(const char *);
-    nsresult SetAcceptLanguages(const char *);
+    nsresult SetAcceptLanguages();
     nsresult SetAcceptEncodings(const char *, bool mIsSecure);
 
     nsresult InitConnectionMgr();
@@ -497,6 +497,7 @@ private:
     nsCString      mUserAgent;
     nsXPIDLCString mUserAgentOverride;
     bool           mUserAgentIsDirty; // true if mUserAgent should be rebuilt
+    bool           mAcceptLanguagesIsDirty;
 
 
     bool           mPromptTempRedirect;