/* * Copyright (C) 2012, 2014, 2016 Igalia S.L. * Copyright (C) 2017 Apple Inc. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #include "config.h" #include "UserAgent.h" #include "UserAgentQuirks.h" #include <wtf/NeverDestroyed.h> #include <wtf/URL.h> #include <wtf/text/StringBuilder.h> #if OS(UNIX) #include <sys/utsname.h> #endif // WARNING! WARNING! WARNING! // // The user agent is ludicrously fragile. The most innocent change can // and will break websites. Read the git log for this file carefully // before changing user agent construction. You have been warned. namespace WebCore { static const char* platformForUAString() { #if OS(MAC_OS_X) return "Macintosh"; #else return "X11"; #endif } static const String platformVersionForUAString() { #if OS(UNIX) struct utsname name; uname(&name); static NeverDestroyed<const String> uaOSVersion(String::format("%s %s", name.sysname, name.machine)); return uaOSVersion; #else // We will always claim to be Safari in Intel Mac OS X, since Safari without // OS X or anything on ARM triggers mobile versions of some websites. // Version is frozen per https://bugs.webkit.org/show_bug.cgi?id=180365 static NeverDestroyed<const String> uaOSVersion(MAKE_STATIC_STRING_IMPL("Intel Mac OS X 10_13_4")); return uaOSVersion; #endif } static inline const char* versionForUAString() { // https://bugs.webkit.org/show_bug.cgi?id=180365 return "605.1.15"; } static String buildUserAgentString(const UserAgentQuirks& quirks) { StringBuilder uaString; uaString.appendLiteral("Mozilla/5.0 "); uaString.append('('); if (quirks.contains(UserAgentQuirks::NeedsMacintoshPlatform)) uaString.append(UserAgentQuirks::stringForQuirk(UserAgentQuirks::NeedsMacintoshPlatform)); else if (quirks.contains(UserAgentQuirks::NeedsLinuxDesktopPlatform)) uaString.append(UserAgentQuirks::stringForQuirk(UserAgentQuirks::NeedsLinuxDesktopPlatform)); else { uaString.append(platformForUAString()); uaString.appendLiteral("; "); uaString.append(platformVersionForUAString()); } uaString.appendLiteral(") AppleWebKit/"); uaString.append(versionForUAString()); uaString.appendLiteral(" (KHTML, like Gecko) "); // Note that Chrome UAs advertise *both* Chrome and Safari. if (quirks.contains(UserAgentQuirks::NeedsChromeBrowser)) { uaString.append(UserAgentQuirks::stringForQuirk(UserAgentQuirks::NeedsChromeBrowser)); uaString.appendLiteral(" "); } // Version/X is mandatory *before* Safari/X to be a valid Safari UA. See // https://bugs.webkit.org/show_bug.cgi?id=133403 for details. uaString.appendLiteral("Version/11.0 Safari/"); uaString.append(versionForUAString()); return uaString.toString(); } static const String standardUserAgentStatic() { static NeverDestroyed<const String> uaStatic(buildUserAgentString(UserAgentQuirks())); return uaStatic; } String standardUserAgent(const String& applicationName, const String& applicationVersion) { // Create a default user agent string with a liberal interpretation of // https://developer.mozilla.org/en-US/docs/User_Agent_Strings_Reference // // Forming a functional user agent is really difficult. We must mention Safari, because some // sites check for that when detecting WebKit browsers. Additionally some sites assume that // browsers that are "Safari" but not running on OS X are the Safari iOS browser. Getting this // wrong can cause sites to load the wrong JavaScript, CSS, or custom fonts. In some cases // sites won't load resources at all. if (applicationName.isEmpty()) return standardUserAgentStatic(); String finalApplicationVersion = applicationVersion; if (finalApplicationVersion.isEmpty()) finalApplicationVersion = versionForUAString(); return standardUserAgentStatic() + ' ' + applicationName + '/' + finalApplicationVersion; } String standardUserAgentForURL(const URL& url) { auto quirks = UserAgentQuirks::quirksForURL(url); // The null string means we don't need a specific UA for the given URL. return quirks.isEmpty() ? String() : buildUserAgentString(quirks); } } // namespace WebCore