mobile/android/base/background/fxa/SkewHandler.java@fc2d59ddac77
mobile/android/base/background/fxa/SkewHandler.java
Wed, 31 Dec 2014 07:22:50 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Wed, 31 Dec 2014 07:22:50 +0100
- branch
- TOR_BUG_3246
- changeset 4
- fc2d59ddac77
- permissions
- -rw-r--r--
Correct previous dual key logic pending first delivery installment.
1 /* This Source Code Form is subject to the terms of the Mozilla Public
2 * License, v. 2.0. If a copy of the MPL was not distributed with this
3 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
5 package org.mozilla.gecko.background.fxa;
7 import java.net.URI;
8 import java.net.URISyntaxException;
9 import java.util.HashMap;
11 import org.mozilla.gecko.background.common.log.Logger;
12 import org.mozilla.gecko.sync.net.Resource;
14 import ch.boye.httpclientandroidlib.Header;
15 import ch.boye.httpclientandroidlib.HttpHeaders;
16 import ch.boye.httpclientandroidlib.HttpResponse;
17 import ch.boye.httpclientandroidlib.impl.cookie.DateParseException;
18 import ch.boye.httpclientandroidlib.impl.cookie.DateUtils;
20 public class SkewHandler {
21 private static final String LOG_TAG = "SkewHandler";
22 protected volatile long skewMillis = 0L;
23 protected final String hostname;
25 private static final HashMap<String, SkewHandler> skewHandlers = new HashMap<String, SkewHandler>();
27 public static SkewHandler getSkewHandlerForResource(final Resource resource) {
28 return getSkewHandlerForHostname(resource.getHostname());
29 }
31 public static SkewHandler getSkewHandlerFromEndpointString(final String url) throws URISyntaxException {
32 if (url == null) {
33 throw new IllegalArgumentException("url must not be null.");
34 }
35 URI u = new URI(url);
36 return getSkewHandlerForHostname(u.getHost());
37 }
39 public static synchronized SkewHandler getSkewHandlerForHostname(final String hostname) {
40 SkewHandler handler = skewHandlers.get(hostname);
41 if (handler == null) {
42 handler = new SkewHandler(hostname);
43 skewHandlers.put(hostname, handler);
44 }
45 return handler;
46 }
48 public static synchronized void clearSkewHandlers() {
49 skewHandlers.clear();
50 }
52 public SkewHandler(final String hostname) {
53 this.hostname = hostname;
54 }
56 public boolean updateSkewFromServerMillis(long millis, long now) {
57 skewMillis = millis - now;
58 Logger.debug(LOG_TAG, "Updated skew: " + skewMillis + "ms for hostname " + this.hostname);
59 return true;
60 }
62 public boolean updateSkewFromHTTPDateString(String date, long now) {
63 try {
64 final long millis = DateUtils.parseDate(date).getTime();
65 return updateSkewFromServerMillis(millis, now);
66 } catch (DateParseException e) {
67 Logger.warn(LOG_TAG, "Unexpected: invalid Date header from " + this.hostname);
68 return false;
69 }
70 }
72 public boolean updateSkewFromDateHeader(Header header, long now) {
73 String date = header.getValue();
74 if (null == date) {
75 Logger.warn(LOG_TAG, "Unexpected: null Date header from " + this.hostname);
76 return false;
77 }
78 return updateSkewFromHTTPDateString(date, now);
79 }
81 /**
82 * Update our tracked skew value to account for the local clock differing from
83 * the server's.
84 *
85 * @param response
86 * the received HTTP response.
87 * @param now
88 * the current time in milliseconds.
89 * @return true if the skew value was updated, false otherwise.
90 */
91 public boolean updateSkew(HttpResponse response, long now) {
92 Header header = response.getFirstHeader(HttpHeaders.DATE);
93 if (null == header) {
94 Logger.warn(LOG_TAG, "Unexpected: missing Date header from " + this.hostname);
95 return false;
96 }
97 return updateSkewFromDateHeader(header, now);
98 }
100 public long getSkewInMillis() {
101 return skewMillis;
102 }
104 public long getSkewInSeconds() {
105 return skewMillis / 1000;
106 }
108 public void resetSkew() {
109 skewMillis = 0L;
110 }
111 }
