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Merge "Consider 200 response with "Content-length <= 4" to not be a captive portal."

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am: 1d18e60e76

Change-Id: I8316ad19bb5633e5c6d64d6c7e589b4bb4548617
This commit is contained in:
Sehee Park
2019-02-20 03:35:36 -08:00
committed by android-build-merger
parent 86ca0ba02f 1d18e60e76
commit 87bba9d278
1 changed files with 16 additions and 14 deletions
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30
packages/NetworkStack/src/com/android/server/connectivity/NetworkMonitor.java
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@@ -1318,26 +1318,28 @@ public class NetworkMonitor extends StateMachine {
// is needed (i.e. can't browse a 204). This could be the result of an HTTP
// proxy server.
if (httpResponseCode == 200) {
long contentLength = urlConnection.getContentLengthLong();
if (probeType == ValidationProbeEvent.PROBE_PAC) {
validationLog(
probeType, url, "PAC fetch 200 response interpreted as 204 response.");
httpResponseCode = CaptivePortalProbeResult.SUCCESS_CODE;
} else if (urlConnection.getContentLengthLong() == 0) {
// Consider 200 response with "Content-length=0" to not be a captive portal.
// There's no point in considering this a captive portal as the user cannot
// sign-in to an empty page. Probably the result of a broken transparent proxy.
// See http://b/9972012.
validationLog(probeType, url,
"200 response with Content-length=0 interpreted as 204 response.");
httpResponseCode = CaptivePortalProbeResult.SUCCESS_CODE;
} else if (urlConnection.getContentLengthLong() == -1) {
// When no Content-length (default value == -1), attempt to read a byte from the
// response. Do not use available() as it is unreliable. See http://b/33498325.
} else if (contentLength == -1) {
// When no Content-length (default value == -1), attempt to read a byte
// from the response. Do not use available() as it is unreliable.
// See http://b/33498325.
if (urlConnection.getInputStream().read() == -1) {
validationLog(
probeType, url, "Empty 200 response interpreted as 204 response.");
httpResponseCode = CaptivePortalProbeResult.SUCCESS_CODE;
validationLog(probeType, url,
"Empty 200 response interpreted as failed response.");
httpResponseCode = CaptivePortalProbeResult.FAILED_CODE;
}
} else if (contentLength <= 4) {
// Consider 200 response with "Content-length <= 4" to not be a captive
// portal. There's no point in considering this a captive portal as the
// user cannot sign-in to an empty page. Probably the result of a broken
// transparent proxy. See http://b/9972012 and http://b/122999481.
validationLog(probeType, url, "200 response with Content-length <= 4"
+ " interpreted as failed response.");
httpResponseCode = CaptivePortalProbeResult.FAILED_CODE;
}
}
} catch (IOException e) {