Part 1: network component changes.

modules/libpref/init/all.js

@@ -1474,7 +1474,10 @@ pref("network.http.request.max-start-delay", 10);
 pref("network.http.request.max-attempts", 10);
 
 // Headers
-pref("network.http.accept.default", "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8");
+pref("network.http.accept.default", "*/*");
+pref("network.http.accept.navigation", "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8");
+pref("network.http.accept.image", "image/png,image/svg+xml,image/*;q=0.8,*/*;q=0.5");
+pref("network.http.accept.style", "text/css,*/*;q=0.1");
 
 // Prefs allowing granular control of referers
 // 0=don't send any, 1=send only on clicks, 2=send on image requests as well

netwerk/protocol/http/AlternateServices.cpp

@@ -654,8 +654,13 @@ private:
   {
     nsID channelId;
     nsLoadFlags flags;
+
+    nsContentPolicyType contentPolicyType =
+        loadInfo ? loadInfo->GetExternalContentPolicyType()
+                 : nsIContentPolicy::TYPE_OTHER;
+
     if (NS_FAILED(gHttpHandler->NewChannelId(&channelId)) ||
-        NS_FAILED(chan->Init(uri, caps, nullptr, 0, nullptr, channelId)) ||
+        NS_FAILED(chan->Init(uri, caps, nullptr, 0, nullptr, channelId, contentPolicyType)) ||
         NS_FAILED(chan->SetAllowAltSvc(false)) ||
         NS_FAILED(chan->SetRedirectMode(nsIHttpChannelInternal::REDIRECT_MODE_ERROR)) ||
         NS_FAILED(chan->SetLoadInfo(loadInfo)) ||

netwerk/protocol/http/HttpBaseChannel.cpp

@@ -151,7 +151,8 @@ HttpBaseChannel::Init(nsIURI *aURI,
                       nsProxyInfo *aProxyInfo,
                       uint32_t aProxyResolveFlags,
                       nsIURI *aProxyURI,
-                      const nsID& aChannelId)
+                      const nsID& aChannelId,
+                      nsContentPolicyType aContentPolicyType)
 {
   LOG(("HttpBaseChannel::Init [this=%p]\n", this));
 
@@ -200,7 +201,7 @@ HttpBaseChannel::Init(nsIURI *aURI,
   rv = mRequestHead.SetHeader(nsHttp::Host, hostLine);
   if (NS_FAILED(rv)) return rv;
 
-  rv = gHttpHandler->AddStandardRequestHeaders(&mRequestHead, isHTTPS);
+  rv = gHttpHandler->AddStandardRequestHeaders(&mRequestHead, isHTTPS, aContentPolicyType);
   if (NS_FAILED(rv)) return rv;
 
   nsAutoCString type;

netwerk/protocol/http/HttpBaseChannel.h

@@ -99,7 +99,8 @@ public:
   virtual nsresult Init(nsIURI *aURI, uint32_t aCaps, nsProxyInfo *aProxyInfo,
                         uint32_t aProxyResolveFlags,
                         nsIURI *aProxyURI,
-                        const nsID& aChannelId);
+                        const nsID& aChannelId,
+                        nsContentPolicyType aContentPolicyType);
 
   // nsIRequest
   NS_IMETHOD GetName(nsACString& aName) override;

netwerk/protocol/http/nsHttpChannel.cpp

@@ -324,10 +324,16 @@ nsHttpChannel::Init(nsIURI *uri,
                     nsProxyInfo *proxyInfo,
                     uint32_t proxyResolveFlags,
                     nsIURI *proxyURI,
-                    const nsID& channelId)
+                    const nsID& channelId,
+                    nsContentPolicyType aContentPolicyType)
 {
-    nsresult rv = HttpBaseChannel::Init(uri, caps, proxyInfo,
+    nsresult rv = HttpBaseChannel::Init(uri,
-                                        proxyResolveFlags, proxyURI, channelId);
+                                        caps,
+                                        proxyInfo,
+                                        proxyResolveFlags,
+                                        proxyURI,
+                                        channelId,
+                                        aContentPolicyType);
     if (NS_FAILED(rv))
         return rv;
 

netwerk/protocol/http/nsHttpChannel.h

@@ -123,7 +123,8 @@ public:
     virtual nsresult Init(nsIURI *aURI, uint32_t aCaps, nsProxyInfo *aProxyInfo,
                           uint32_t aProxyResolveFlags,
                           nsIURI *aProxyURI,
-                          const nsID& aChannelId) override;
+                          const nsID& aChannelId,
+                          nsContentPolicyType aContentPolicyType) override;
 
     nsresult OnPush(const nsACString &uri, Http2PushedStream *pushedStream);
 

netwerk/protocol/http/nsHttpHandler.cpp

@@ -468,7 +468,9 @@ nsHttpHandler::InitConnectionMgr()
 }
 
 nsresult
-nsHttpHandler::AddStandardRequestHeaders(nsHttpRequestHead *request, bool isSecure)
+nsHttpHandler::AddStandardRequestHeaders(nsHttpRequestHead *request,
+                                         bool isSecure,
+                                         nsContentPolicyType aContentPolicyType)
 {
     nsresult rv;
 
@@ -481,7 +483,20 @@ nsHttpHandler::AddStandardRequestHeaders(nsHttpRequestHead *request, bool isSecu
     // Add the "Accept" header.  Note, this is set as an override because the
     // service worker expects to see it.  The other "default" headers are
     // hidden from service worker interception.
-    rv = request->SetHeader(nsHttp::Accept, mAccept,
+    nsAutoCString accept;
+    if (aContentPolicyType == nsIContentPolicy::TYPE_DOCUMENT ||
+        aContentPolicyType == nsIContentPolicy::TYPE_SUBDOCUMENT) {
+      accept.Assign(mAcceptNavigation);
+    } else if (aContentPolicyType == nsIContentPolicy::TYPE_IMAGE ||
+               aContentPolicyType == nsIContentPolicy::TYPE_IMAGESET) {
+      accept.Assign(mAcceptImage);
+    } else if (aContentPolicyType == nsIContentPolicy::TYPE_STYLESHEET) {
+      accept.Assign(mAcceptStyle);
+    } else {
+      accept.Assign(mAcceptDefault);
+    }
+
+    rv = request->SetHeader(nsHttp::Accept, accept,
                             false, nsHttpHeaderArray::eVarietyRequestOverride);
     if (NS_FAILED(rv)) return rv;
 
@@ -1268,12 +1283,36 @@ nsHttpHandler::PrefsChanged(nsIPrefBranch *prefs, const char *pref)
             mQoSBits = (uint8_t) clamped(val, 0, 0xff);
     }
 
+    if (PREF_CHANGED(HTTP_PREF("accept.navigation"))) {
+        nsXPIDLCString accept;
+        rv = prefs->GetCharPref(HTTP_PREF("accept.navigation"),
+                                  getter_Copies(accept));
+        if (NS_SUCCEEDED(rv))
+            SetAccept(accept, ACCEPT_NAVIGATION);
+    }
+
+    if (PREF_CHANGED(HTTP_PREF("accept.image"))) {
+        nsXPIDLCString accept;
+        rv = prefs->GetCharPref(HTTP_PREF("accept.image"),
+                                  getter_Copies(accept));
+        if (NS_SUCCEEDED(rv))
+            SetAccept(accept, ACCEPT_IMAGE);
+    }
+
+    if (PREF_CHANGED(HTTP_PREF("accept.style"))) {
+        nsXPIDLCString accept;
+        rv = prefs->GetCharPref(HTTP_PREF("accept.style"),
+                                  getter_Copies(accept));
+        if (NS_SUCCEEDED(rv))
+            SetAccept(accept, ACCEPT_STYLE);
+    }
+
     if (PREF_CHANGED(HTTP_PREF("accept.default"))) {
         nsXPIDLCString accept;
         rv = prefs->GetCharPref(HTTP_PREF("accept.default"),
                                   getter_Copies(accept));
         if (NS_SUCCEEDED(rv))
-            SetAccept(accept);
+            SetAccept(accept, ACCEPT_DEFAULT);
     }
 
     if (PREF_CHANGED(HTTP_PREF("accept-encoding"))) {
@@ -1897,9 +1936,21 @@ nsHttpHandler::SetAcceptLanguages()
 }
 
 nsresult
-nsHttpHandler::SetAccept(const char *aAccept)
+nsHttpHandler::SetAccept(const char *aAccept, AcceptType aType)
 {
-    mAccept = aAccept;
+    switch (aType) {
+        case ACCEPT_NAVIGATION:
+            mAcceptNavigation = aAccept;
+            break;
+        case ACCEPT_IMAGE:
+            mAcceptImage = aAccept;
+            break;
+        case ACCEPT_STYLE:
+            mAcceptStyle = aAccept;
+            break;
+        case ACCEPT_DEFAULT:
+            mAcceptDefault = aAccept;
+    }
     return NS_OK;
 }
 
@@ -2057,7 +2108,11 @@ nsHttpHandler::NewProxiedChannel2(nsIURI *uri,
     rv = NewChannelId(&channelId);
     NS_ENSURE_SUCCESS(rv, rv);
 
-    rv = httpChannel->Init(uri, caps, proxyInfo, proxyResolveFlags, proxyURI, channelId);
+    nsContentPolicyType contentPolicyType =
+        aLoadInfo ? aLoadInfo->GetExternalContentPolicyType()
+                  : nsIContentPolicy::TYPE_OTHER;
+
+    rv = httpChannel->Init(uri, caps, proxyInfo, proxyResolveFlags, proxyURI, channelId, contentPolicyType);
     if (NS_FAILED(rv))
         return rv;
 

netwerk/protocol/http/nsHttpHandler.h

@@ -15,6 +15,7 @@
 #include "nsCOMPtr.h"
 #include "nsWeakReference.h"
 
+#include "nsIContentPolicy.h"
 #include "nsIHttpProtocolHandler.h"
 #include "nsIObserver.h"
 #include "nsISpeculativeConnect.h"
@@ -50,6 +51,14 @@ enum FrameCheckLevel {
     FRAMECHECK_STRICT
 };
 
+// Fetch spec different http Accept types
+enum AcceptType {
+    ACCEPT_NAVIGATION,
+    ACCEPT_IMAGE,
+    ACCEPT_STYLE,
+    ACCEPT_DEFAULT,
+};
+
 //-----------------------------------------------------------------------------
 // nsHttpHandler - protocol handler for HTTP and HTTPS
 //-----------------------------------------------------------------------------
@@ -70,7 +79,7 @@ public:
     nsHttpHandler();
 
     nsresult Init();
-    nsresult AddStandardRequestHeaders(nsHttpRequestHead *, bool isSecure);
+    nsresult AddStandardRequestHeaders(nsHttpRequestHead *, bool isSecure, nsContentPolicyType aContentPolicyType);
     nsresult AddConnectionHeader(nsHttpRequestHead *,
                                  uint32_t capabilities);
     bool     IsAcceptableEncoding(const char *encoding, bool isSecure);
@@ -385,7 +394,7 @@ private:
     void     InitUserAgentComponents();
     void     PrefsChanged(nsIPrefBranch *prefs, const char *pref);
 
-    nsresult SetAccept(const char *);
+    nsresult SetAccept(const char *, AcceptType aType);
     nsresult SetAcceptLanguages();
     nsresult SetAcceptEncodings(const char *, bool mIsSecure);
 
@@ -394,8 +403,8 @@ private:
     void     NotifyObservers(nsIHttpChannel *chan, const char *event);
 
     static void TimerCallback(nsITimer * aTimer, void * aClosure);
-private:
     
+private:
     // cached services
     nsMainThreadPtrHandle<nsIIOService>              mIOService;
     nsMainThreadPtrHandle<nsIStreamConverterService> mStreamConvSvc;
@@ -460,7 +469,10 @@ private:
     bool mPipeliningOverSSL;
     bool mEnforceAssocReq;
 
-    nsCString mAccept;
+    nsCString mAcceptNavigation;
+    nsCString mAcceptImage;
+    nsCString mAcceptStyle;
+    nsCString mAcceptDefault;
     nsCString mAcceptLanguages;
     nsCString mHttpAcceptEncodings;
     nsCString mHttpsAcceptEncodings;