Index: components/data_reduction_proxy/content/browser/content_lofi_decider.cc |
diff --git a/components/data_reduction_proxy/content/browser/content_lofi_decider.cc b/components/data_reduction_proxy/content/browser/content_lofi_decider.cc |
index f600474209e79d6a53f1f31e3462e89a25855216..148c380d79b4b5673ab0c2504cae4b2011c5e810 100644 |
--- a/components/data_reduction_proxy/content/browser/content_lofi_decider.cc |
+++ b/components/data_reduction_proxy/content/browser/content_lofi_decider.cc |
@@ -43,7 +43,6 @@ bool ContentLoFiDecider::IsUsingLoFi(const net::URLRequest& request) const { |
void ContentLoFiDecider::MaybeSetAcceptTransformHeader( |
const net::URLRequest& request, |
- bool are_previews_disabled, |
net::HttpRequestHeaders* headers) const { |
const content::ResourceRequestInfo* request_info = |
content::ResourceRequestInfo::ForRequest(&request); |
@@ -67,28 +66,16 @@ void ContentLoFiDecider::MaybeSetAcceptTransformHeader( |
return; |
} |
- // The Lo-Fi and Lite Page directives should not be added for users in the |
- // Lo-Fi field trial "Control" group. |
- bool lofi_enabled_via_flags_or_field_trial = |
- params::IsLoFiOnViaFlags() || params::IsIncludedInLoFiEnabledFieldTrial(); |
- |
- bool lite_page_enabled_via_flags_or_field_trial = |
- (params::IsLoFiOnViaFlags() && params::AreLitePagesEnabledViaFlags()) || |
- params::IsIncludedInLitePageFieldTrial(); |
- |
- // User does not have previews enabled. |
- if (!lofi_enabled_via_flags_or_field_trial && |
- !lite_page_enabled_via_flags_or_field_trial) { |
- return; |
- } |
- |
- // Previews has been disabled. |
- if (are_previews_disabled) |
+ // Do not add the Chrome-Proxy-Accept-Transform header if the request |
+ // has previews turned off. |
+ content::PreviewsState previews_state = request_info->GetPreviewsState(); |
+ if (previews_state & content::PREVIEWS_OFF) |
return; |
+ // TODO(dougarnett): Remove once blink uses Off instead of NoTransform. |
// Do not add the Chrome-Proxy-Accept-Transform header when the page load |
// explicitly forbids previews transformations. |
- if (request_info->GetPreviewsState() & content::PREVIEWS_NO_TRANSFORM) |
+ if (previews_state & content::PREVIEWS_NO_TRANSFORM) |
return; |
// Lo-Fi is not allowed on the main frame, stylesheet, script, font resource, |
@@ -104,32 +91,14 @@ void ContentLoFiDecider::MaybeSetAcceptTransformHeader( |
// If the Lite Page field trial or flag is enabled, only add the "lite-page" |
// directive on main frame requests. Only add "empty-image" directives to |
// other requests when Lite Page previews are not enabled after the main |
- // frame. Add the "if-heavy" qualifier to allow the server to provide a |
- // preview when the page is data heavy on if a preview was not otherwise |
- // triggered. |
+ // frame. |
std::string accept_transform_value; |
- if (lite_page_enabled_via_flags_or_field_trial && |
+ if ((previews_state & content::SERVER_LITE_PAGE_ON) && |
resource_type == content::RESOURCE_TYPE_MAIN_FRAME) { |
accept_transform_value = lite_page_directive(); |
- |
- // Since a Lite Page was not triggered client side, ask the server to |
- // provide a Lite Page only if the page is otherwise data-heavy. |
- if (!(request_info->GetPreviewsState() & content::SERVER_LITE_PAGE_ON)) |
- accept_transform_value += base::StringPrintf(";%s", if_heavy_qualifier()); |
- } else if (lofi_enabled_via_flags_or_field_trial && |
- // Only use Lo-Fi if Lite Pages aren't enabled or fallback from |
- // Lite Pages to Lo-Fi is enabled. |
- (!lite_page_enabled_via_flags_or_field_trial || |
- params::IsLitePageFallbackEnabled()) && |
- resource_type_supports_empty_image && |
- !(request_info->GetPreviewsState() & |
- content::SERVER_LITE_PAGE_ON)) { |
+ } else if ((previews_state & content::SERVER_LOFI_ON) && |
+ resource_type_supports_empty_image) { |
accept_transform_value = empty_image_directive(); |
- |
- // Since Lo-Fi was not triggered client side, ask the server to provide |
- // Lo-Fi only if the page is otherwise data-heavy. |
- if (!(request_info->GetPreviewsState() & content::SERVER_LOFI_ON)) |
- accept_transform_value += base::StringPrintf(";%s", if_heavy_qualifier()); |
} |
if (accept_transform_value.empty()) |
return; |
@@ -180,23 +149,24 @@ void ContentLoFiDecider::RemoveAcceptTransformHeader( |
headers->RemoveHeader(chrome_proxy_accept_transform_header()); |
} |
-void ContentLoFiDecider::MaybeSetIgnorePreviewsBlacklistDirective( |
+void ContentLoFiDecider::MaybeSetForceLitePageDirective( |
net::HttpRequestHeaders* headers) const { |
+ // Ensure lite page is requested in headers and enabled via flag. |
bengr
2017/05/01 16:53:13
This is very confusing. If lite pages are requeste
|
if (!headers || !params::AreLitePagesEnabledViaFlags() || |
!IsLitePagePreviewRequested(*headers)) { |
return; |
} |
+ |
std::string chrome_proxy_header_value; |
headers->GetHeader(chrome_proxy_header(), &chrome_proxy_header_value); |
headers->RemoveHeader(chrome_proxy_header()); |
if (!chrome_proxy_header_value.empty()) |
chrome_proxy_header_value += ", "; |
- chrome_proxy_header_value += |
- chrome_proxy_lite_page_ignore_blacklist_directive(); |
+ chrome_proxy_header_value += chrome_proxy_force_lite_page_directive(); |
headers->SetHeader(chrome_proxy_header(), chrome_proxy_header_value); |
} |
-bool ContentLoFiDecider::ShouldRecordLoFiUMA( |
+bool ContentLoFiDecider::ShouldRecordPreviewsUMA( |
const net::URLRequest& request) const { |
const content::ResourceRequestInfo* request_info = |
content::ResourceRequestInfo::ForRequest(&request); |