cb4aa4d412
The captive portal detection logic treats empty http responses with a Content-Length of 0 as not coming from a portal. However when the Content-Length is missing from the response header, the empty response is not detected as such and is classified as a captive portal answer. When this happens for the http probe, the portal detection logic will short circuit the detection and wrongly report a portal. The system validates the network in such conditions only if the https probe returns a successful connection faster than the http probe. This patch attempts to better detect empty responses by trying to read the first byte from the response body when the Content-Length is missing for 200 responses. Test: build, flashed + manual tests. Bug: 33498325 Change-Id: Ie2e5c6a9dc3740e4a2304034879b5ed60f277ade