Merge "Add configurable captive portal probes" into pi-dev (23d3487c) · Commits · e / os / android_frameworks_base

core/java/android/net/ConnectivityManager.java

+8 −0

Original line number	Diff line number	Diff line
		@@ -237,6 +237,14 @@ public class ConnectivityManager {
		*/
		public static final String EXTRA_CAPTIVE_PORTAL_URL = "android.net.extra.CAPTIVE_PORTAL_URL";

		/**
		* Key for passing a {@link android.net.captiveportal.CaptivePortalProbeSpec} to the captive
		* portal login activity.
		* {@hide}
		*/
		public static final String EXTRA_CAPTIVE_PORTAL_PROBE_SPEC =
		"android.net.extra.CAPTIVE_PORTAL_PROBE_SPEC";

		/**
		* Key for passing a user agent string to the captive portal login activity.
		* {@hide}

core/java/android/net/captiveportal/CaptivePortalProbeResult.java

+11 −0

Original line number	Diff line number	Diff line
		@@ -16,6 +16,8 @@

		package android.net.captiveportal;

		import android.annotation.Nullable;

		/**
		* Result of calling isCaptivePortal().
		* @hide
		@@ -23,6 +25,7 @@ package android.net.captiveportal;
		public final class CaptivePortalProbeResult {
		public static final int SUCCESS_CODE = 204;
		public static final int FAILED_CODE = 599;
		public static final int PORTAL_CODE = 302;

		public static final CaptivePortalProbeResult FAILED = new CaptivePortalProbeResult(FAILED_CODE);
		public static final CaptivePortalProbeResult SUCCESS =
		@@ -32,15 +35,23 @@ public final class CaptivePortalProbeResult {
		public final String redirectUrl; // Redirect destination returned from Internet probe.
		public final String detectUrl; // URL where a 204 response code indicates
		// captive portal has been appeased.
		@Nullable
		public final CaptivePortalProbeSpec probeSpec;

		public CaptivePortalProbeResult(int httpResponseCode) {
		this(httpResponseCode, null, null);
		}

		public CaptivePortalProbeResult(int httpResponseCode, String redirectUrl, String detectUrl) {
		this(httpResponseCode, redirectUrl, detectUrl, null);
		}

		public CaptivePortalProbeResult(int httpResponseCode, String redirectUrl, String detectUrl,
		CaptivePortalProbeSpec probeSpec) {
		mHttpResponseCode = httpResponseCode;
		this.redirectUrl = redirectUrl;
		this.detectUrl = detectUrl;
		this.probeSpec = probeSpec;
		}

		public boolean isSuccessful() {

core/java/android/net/captiveportal/CaptivePortalProbeSpec.java

0 → 100644

+180 −0

Original line number	Diff line number	Diff line
		/*
		* Copyright (C) 2018 The Android Open Source Project
		*
		* Licensed under the Apache License, Version 2.0 (the "License");
		* you may not use this file except in compliance with the License.
		* You may obtain a copy of the License at
		*
		* http://www.apache.org/licenses/LICENSE-2.0
		*
		* Unless required by applicable law or agreed to in writing, software
		* distributed under the License is distributed on an "AS IS" BASIS,
		* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
		* See the License for the specific language governing permissions and
		* limitations under the License.
		*/

		package android.net.captiveportal;

		import static android.net.captiveportal.CaptivePortalProbeResult.PORTAL_CODE;
		import static android.net.captiveportal.CaptivePortalProbeResult.SUCCESS_CODE;

		import android.annotation.NonNull;
		import android.annotation.Nullable;
		import android.text.TextUtils;
		import android.util.Log;

		import java.net.MalformedURLException;
		import java.net.URL;
		import java.text.ParseException;
		import java.util.ArrayList;
		import java.util.List;
		import java.util.regex.Pattern;
		import java.util.regex.PatternSyntaxException;

		/** @hide */
		public abstract class CaptivePortalProbeSpec {
		public static final String HTTP_LOCATION_HEADER_NAME = "Location";

		private static final String TAG = CaptivePortalProbeSpec.class.getSimpleName();
		private static final String REGEX_SEPARATOR = "@@/@@";
		private static final String SPEC_SEPARATOR = "@@,@@";

		private final String mEncodedSpec;
		private final URL mUrl;

		CaptivePortalProbeSpec(String encodedSpec, URL url) {
		mEncodedSpec = encodedSpec;
		mUrl = url;
		}

		/**
		* Parse a {@link CaptivePortalProbeSpec} from a {@link String}.
		*
		* <p>The valid format is a URL followed by two regular expressions, each separated by "@@/@@".
		* @throws MalformedURLException The URL has invalid format for {@link URL#URL(String)}.
		* @throws ParseException The string is empty, does not match the above format, or a regular
		* expression is invalid for {@link Pattern#compile(String)}.
		*/
		@NonNull
		public static CaptivePortalProbeSpec parseSpec(String spec) throws ParseException,
		MalformedURLException {
		if (TextUtils.isEmpty(spec)) {
		throw new ParseException("Empty probe spec", 0 /* errorOffset */);
		}

		String[] splits = TextUtils.split(spec, REGEX_SEPARATOR);
		if (splits.length != 3) {
		throw new ParseException("Probe spec does not have 3 parts", 0 /* errorOffset */);
		}

		final int statusRegexPos = splits[0].length() + REGEX_SEPARATOR.length();
		final int locationRegexPos = statusRegexPos + splits[1].length() + REGEX_SEPARATOR.length();
		final Pattern statusRegex = parsePatternIfNonEmpty(splits[1], statusRegexPos);
		final Pattern locationRegex = parsePatternIfNonEmpty(splits[2], locationRegexPos);

		return new RegexMatchProbeSpec(spec, new URL(splits[0]), statusRegex, locationRegex);
		}

		@Nullable
		private static Pattern parsePatternIfNonEmpty(String pattern, int pos) throws ParseException {
		if (TextUtils.isEmpty(pattern)) {
		return null;
		}
		try {
		return Pattern.compile(pattern);
		} catch (PatternSyntaxException e) {
		throw new ParseException(
		String.format("Invalid status pattern [%s]: %s", pattern, e),
		pos /* errorOffset */);
		}
		}

		/**
		* Parse a {@link CaptivePortalProbeSpec} from a {@link String}, or return a fallback spec
		* based on the status code of the provided URL if the spec cannot be parsed.
		*/
		@Nullable
		public static CaptivePortalProbeSpec parseSpecOrNull(@Nullable String spec) {
		if (spec != null) {
		try {
		return parseSpec(spec);
		} catch (ParseException \| MalformedURLException e) {
		Log.e(TAG, "Invalid probe spec: " + spec, e);
		// Fall through
		}
		}
		return null;
		}

		/**
		* Parse a config String to build an array of {@link CaptivePortalProbeSpec}.
		*
		* <p>Each spec is separated by @@,@@ and follows the format for {@link #parseSpec(String)}.
		* <p>This method does not throw but ignores any entry that could not be parsed.
		*/
		public static CaptivePortalProbeSpec[] parseCaptivePortalProbeSpecs(String settingsVal) {
		List<CaptivePortalProbeSpec> specs = new ArrayList<>();
		if (settingsVal != null) {
		for (String spec : TextUtils.split(settingsVal, SPEC_SEPARATOR)) {
		try {
		specs.add(parseSpec(spec));
		} catch (ParseException \| MalformedURLException e) {
		Log.e(TAG, "Invalid probe spec: " + spec, e);
		}
		}
		}

		if (specs.isEmpty()) {
		Log.e(TAG, String.format("could not create any validation spec from %s", settingsVal));
		}
		return specs.toArray(new CaptivePortalProbeSpec[specs.size()]);
		}

		/**
		* Get the probe result from HTTP status and location header.
		*/
		public abstract CaptivePortalProbeResult getResult(int status, @Nullable String locationHeader);

		public String getEncodedSpec() {
		return mEncodedSpec;
		}

		public URL getUrl() {
		return mUrl;
		}

		/**
		* Implementation of {@link CaptivePortalProbeSpec} that is based on configurable regular
		* expressions for the HTTP status code and location header (if any). Matches indicate that
		* the page is not a portal.
		* This probe cannot fail: it always returns SUCCESS_CODE or PORTAL_CODE
		*/
		private static class RegexMatchProbeSpec extends CaptivePortalProbeSpec {
		@Nullable
		final Pattern mStatusRegex;
		@Nullable
		final Pattern mLocationHeaderRegex;

		RegexMatchProbeSpec(
		String spec, URL url, Pattern statusRegex, Pattern locationHeaderRegex) {
		super(spec, url);
		mStatusRegex = statusRegex;
		mLocationHeaderRegex = locationHeaderRegex;
		}

		@Override
		public CaptivePortalProbeResult getResult(int status, String locationHeader) {
		final boolean statusMatch = safeMatch(String.valueOf(status), mStatusRegex);
		final boolean locationMatch = safeMatch(locationHeader, mLocationHeaderRegex);
		final int returnCode = statusMatch && locationMatch ? SUCCESS_CODE : PORTAL_CODE;
		return new CaptivePortalProbeResult(
		returnCode, locationHeader, getUrl().toString(), this);
		}
		}

		private static boolean safeMatch(@Nullable String value, @Nullable Pattern pattern) {
		// No value is a match ("no location header" passes the location rule for non-redirects)
		return pattern == null \|\| TextUtils.isEmpty(value) \|\| pattern.matcher(value).matches();
		}
		}

core/java/android/provider/Settings.java

+9 −0

Original line number	Diff line number	Diff line
		@@ -10289,6 +10289,15 @@ public final class Settings {
		public static final String CAPTIVE_PORTAL_OTHER_FALLBACK_URLS =
		"captive_portal_other_fallback_urls";

		/**
		* A list of captive portal detection specifications used in addition to the fallback URLs.
		* Each spec has the format url@@/@@statusCodeRegex@@/@@contentRegex. Specs are separated
		* by "@@,@@".
		* @hide
		*/
		public static final String CAPTIVE_PORTAL_FALLBACK_PROBE_SPECS =
		"captive_portal_fallback_probe_specs";

		/**
		* Whether to use HTTPS for network validation. This is enabled by default and the setting
		* needs to be set to 0 to disable it. This setting is a misnomer because captive portals

core/tests/coretests/src/android/provider/SettingsBackupTest.java

+1 −0

Original line number	Diff line number	Diff line
		@@ -157,6 +157,7 @@ public class SettingsBackupTest {
		Settings.Global.CAPTIVE_PORTAL_HTTP_URL,
		Settings.Global.CAPTIVE_PORTAL_MODE,
		Settings.Global.CAPTIVE_PORTAL_OTHER_FALLBACK_URLS,
		Settings.Global.CAPTIVE_PORTAL_FALLBACK_PROBE_SPECS,
		Settings.Global.CAPTIVE_PORTAL_SERVER,
		Settings.Global.CAPTIVE_PORTAL_USE_HTTPS,
		Settings.Global.CAPTIVE_PORTAL_USER_AGENT,