SDCH support in Android WebView?

[Ronen Barenboim]

Does Android WebView (https://developer.android.com/reference/android/webkit/WebView.html) support SDCH? On which Android versions? Is this on by default? Configurable?

[Ronen Barenboim]

A simple app hosting a WebView does not seem to be reporting SDCH in ACCEPT_ENCODING. 

[xunj...@chromium.org]

Android Webview doesn't currently support SDCH.

The relevant code is in aw_url_request_context_getter.cc (https://cs.chromium.org/chromium/src/android_webview/browser/net/aw_url_request_context_getter.cc?rcl=0&l=200). SDCH can be enabled through URLRequestContextBuilder::set_sdch_enabled, but the URLRequestContextBuilder that WebView has doesn't set that option.

[Ronen Barenboim]

Is there any way an application can provide the WebView with a connection to use? Seems like with shouldInterceptRequest you can only provide content and not a connection to use. shouldOverrideUrlLoading does not help as well. Can you think of some other way?

In none, then this means that if you want SDCH in a WebView you have to override shouldInterceptRequest modify the headers to report SDCH support and then provide a SDCH codec to parse the responses. Basically duplicating the SDCH implementation already in the system. Lots of delicate code which effectively duplicate what the OS already implemented. 

Is there a reason why SDCH is disabled for a WebView? Any plans to enable it?

[Helen Li]

Is there a reason why SDCH is disabled for a WebView? Any plans to enable it?

I am not aware of any plan to enable/support SDCH on Android WebView in the near future.

 

On Wednesday, July 6, 2016 at 2:05:17 PM UTC-7, xunj...@chromium.org wrote:

Android Webview doesn't currently support SDCH.

The relevant code is in aw_url_request_context_getter.cc (https://cs.chromium.org/chromium/src/android_webview/browser/net/aw_url_request_context_getter.cc?rcl=0&l=200). SDCH can be enabled through URLRequestContextBuilder::set_sdch_enabled, but the URLRequestContextBuilder that WebView has doesn't set that option.

On Wednesday, July 6, 2016 at 4:22:02 PM UTC-4, Ronen Barenboim wrote:

Does Android WebView (https://developer.android.com/reference/android/webkit/WebView.html) support SDCH? On which Android versions? Is this on by default? Configurable?

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