Move CanonicalCookie into separate files

net/cookies/canonical_cookie.cc

+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Portions of this code based on Mozilla:
+//   (netwerk/cookie/src/nsCookieService.cpp)
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (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.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is mozilla.org code.
+ *
+ * The Initial Developer of the Original Code is
+ * Netscape Communications Corporation.
+ * Portions created by the Initial Developer are Copyright (C) 2003
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *   Daniel Witte (dwitte@stanford.edu)
+ *   Michiel van Leeuwen (mvl@exedo.nl)
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+#include "net/cookies/canonical_cookie.h"
+
+#include "base/basictypes.h"
+#include "base/format_macros.h"
+#include "base/logging.h"
+#include "base/stringprintf.h"
+#include "googleurl/src/gurl.h"
+#include "googleurl/src/url_canon.h"
+#include "net/cookies/cookie_util.h"
+#include "net/cookies/parsed_cookie.h"
+
+using base::Time;
+using base::TimeDelta;
+
+namespace net {
+
+namespace {
+
+// Determine the cookie domain to use for setting the specified cookie.
+bool GetCookieDomain(const GURL& url,
+                     const ParsedCookie& pc,
+                     std::string* result) {
+  std::string domain_string;
+  if (pc.HasDomain())
+    domain_string = pc.Domain();
+  return cookie_util::GetCookieDomainWithString(url, domain_string, result);
+}
+
+std::string CanonPathWithString(const GURL& url,
+                                const std::string& path_string) {
+  // The RFC says the path should be a prefix of the current URL path.
+  // However, Mozilla allows you to set any path for compatibility with
+  // broken websites.  We unfortunately will mimic this behavior.  We try
+  // to be generous and accept cookies with an invalid path attribute, and
+  // default the path to something reasonable.
+
+  // The path was supplied in the cookie, we'll take it.
+  if (!path_string.empty() && path_string[0] == '/')
+    return path_string;
+
+  // The path was not supplied in the cookie or invalid, we will default
+  // to the current URL path.
+  // """Defaults to the path of the request URL that generated the
+  //    Set-Cookie response, up to, but not including, the
+  //    right-most /."""
+  // How would this work for a cookie on /?  We will include it then.
+  const std::string& url_path = url.path();
+
+  size_t idx = url_path.find_last_of('/');
+
+  // The cookie path was invalid or a single '/'.
+  if (idx == 0 || idx == std::string::npos)
+    return std::string("/");
+
+  // Return up to the rightmost '/'.
+  return url_path.substr(0, idx);
+}
+
+}  // namespace
+
+CanonicalCookie::CanonicalCookie()
+    : secure_(false),
+      httponly_(false) {
+  SetSessionCookieExpiryTime();
+}
+
+CanonicalCookie::CanonicalCookie(
+    const GURL& url, const std::string& name, const std::string& value,
+    const std::string& domain, const std::string& path,
+    const std::string& mac_key, const std::string& mac_algorithm,
+    const base::Time& creation, const base::Time& expiration,
+    const base::Time& last_access, bool secure, bool httponly)
+    : source_(GetCookieSourceFromURL(url)),
+      name_(name),
+      value_(value),
+      domain_(domain),
+      path_(path),
+      mac_key_(mac_key),
+      mac_algorithm_(mac_algorithm),
+      creation_date_(creation),
+      expiry_date_(expiration),
+      last_access_date_(last_access),
+      secure_(secure),
+      httponly_(httponly) {
+  if (expiration.is_null())
+    SetSessionCookieExpiryTime();
+}
+
+CanonicalCookie::CanonicalCookie(const GURL& url, const ParsedCookie& pc)
+    : source_(GetCookieSourceFromURL(url)),
+      name_(pc.Name()),
+      value_(pc.Value()),
+      path_(CanonPath(url, pc)),
+      mac_key_(pc.MACKey()),
+      mac_algorithm_(pc.MACAlgorithm()),
+      creation_date_(Time::Now()),
+      last_access_date_(Time()),
+      secure_(pc.IsSecure()),
+      httponly_(pc.IsHttpOnly()) {
+  if (pc.HasExpires())
+    expiry_date_ = CanonExpiration(pc, creation_date_, creation_date_);
+  else
+    SetSessionCookieExpiryTime();
+
+  // Do the best we can with the domain.
+  std::string cookie_domain;
+  std::string domain_string;
+  if (pc.HasDomain()) {
+    domain_string = pc.Domain();
+  }
+  bool result
+      = cookie_util::GetCookieDomainWithString(url, domain_string,
+                                                &cookie_domain);
+  // Caller is responsible for passing in good arguments.
+  DCHECK(result);
+  domain_ = cookie_domain;
+}
+
+CanonicalCookie::~CanonicalCookie() {
+}
+
+std::string CanonicalCookie::GetCookieSourceFromURL(const GURL& url) {
+  if (url.SchemeIsFile())
+    return url.spec();
+
+  url_canon::Replacements<char> replacements;
+  replacements.ClearPort();
+  if (url.SchemeIsSecure())
+    replacements.SetScheme("http", url_parse::Component(0, 4));
+
+  return url.GetOrigin().ReplaceComponents(replacements).spec();
+}
+
+// static
+std::string CanonicalCookie::CanonPath(const GURL& url,
+                                       const ParsedCookie& pc) {
+  std::string path_string;
+  if (pc.HasPath())
+    path_string = pc.Path();
+  return CanonPathWithString(url, path_string);
+}
+
+// static
+Time CanonicalCookie::CanonExpiration(const ParsedCookie& pc,
+                                      const Time& current,
+                                      const Time& server_time) {
+  // First, try the Max-Age attribute.
+  uint64 max_age = 0;
+  if (pc.HasMaxAge() &&
+#ifdef COMPILER_MSVC
+      sscanf_s(
+#else
+      sscanf(
+#endif
+             pc.MaxAge().c_str(), " %" PRIu64, &max_age) == 1) {
+    return current + TimeDelta::FromSeconds(max_age);
+  }
+
+  // Try the Expires attribute.
+  if (pc.HasExpires()) {
+    // Adjust for clock skew between server and host.
+    return current + (ParsedCookie::ParseCookieTime(pc.Expires()) -
+                      server_time);
+  }
+
+  // Invalid or no expiration, persistent cookie.
+  return Time();
+}
+
+void CanonicalCookie::SetSessionCookieExpiryTime() {
+#if defined(ENABLE_PERSISTENT_SESSION_COOKIES)
+  // Mobile apps can sometimes be shut down without any warning, so the session
+  // cookie has to be persistent and given a default expiration time.
+  expiry_date_ = base::Time::Now() +
+      base::TimeDelta::FromDays(kPersistentSessionCookieExpiryInDays);
+#endif
+}
+
+CanonicalCookie* CanonicalCookie::Create(const GURL& url,
+                                         const ParsedCookie& pc) {
+  if (!pc.IsValid()) {
+    return NULL;
+  }
+
+  std::string domain_string;
+  if (!GetCookieDomain(url, pc, &domain_string)) {
+    return NULL;
+  }
+  std::string path_string = CanonPath(url, pc);
+  std::string mac_key = pc.HasMACKey() ? pc.MACKey() : std::string();
+  std::string mac_algorithm = pc.HasMACAlgorithm() ?
+      pc.MACAlgorithm() : std::string();
+  Time creation_time = Time::Now();
+  Time expiration_time;
+  if (pc.HasExpires())
+    expiration_time =  ParsedCookie::ParseCookieTime(pc.Expires());
+
+  return (Create(url, pc.Name(), pc.Value(), domain_string, path_string,
+                 mac_key, mac_algorithm, creation_time, expiration_time,
+                 pc.IsSecure(), pc.IsHttpOnly()));
+}
+
+CanonicalCookie* CanonicalCookie::Create(const GURL& url,
+                                         const std::string& name,
+                                         const std::string& value,
+                                         const std::string& domain,
+                                         const std::string& path,
+                                         const std::string& mac_key,
+                                         const std::string& mac_algorithm,
+                                         const base::Time& creation,
+                                         const base::Time& expiration,
+                                         bool secure,
+                                         bool http_only) {
+  // Expect valid attribute tokens and values, as defined by the ParsedCookie
+  // logic, otherwise don't create the cookie.
+  std::string parsed_name = ParsedCookie::ParseTokenString(name);
+  if (parsed_name != name)
+    return NULL;
+  std::string parsed_value = ParsedCookie::ParseValueString(value);
+  if (parsed_value != value)
+    return NULL;
+
+  std::string parsed_domain = ParsedCookie::ParseValueString(domain);
+  if (parsed_domain != domain)
+    return NULL;
+  std::string cookie_domain;
+  if (!cookie_util::GetCookieDomainWithString(url, parsed_domain,
+                                               &cookie_domain)) {
+    return NULL;
+  }
+
+  std::string parsed_path = ParsedCookie::ParseValueString(path);
+  if (parsed_path != path)
+    return NULL;
+
+  std::string cookie_path = CanonPathWithString(url, parsed_path);
+  // Expect that the path was either not specified (empty), or is valid.
+  if (!parsed_path.empty() && cookie_path != parsed_path)
+    return NULL;
+  // Canonicalize path again to make sure it escapes characters as needed.
+  url_parse::Component path_component(0, cookie_path.length());
+  url_canon::RawCanonOutputT<char> canon_path;
+  url_parse::Component canon_path_component;
+  url_canon::CanonicalizePath(cookie_path.data(), path_component,
+                              &canon_path, &canon_path_component);
+  cookie_path = std::string(canon_path.data() + canon_path_component.begin,
+                            canon_path_component.len);
+
+  return new CanonicalCookie(url, parsed_name, parsed_value, cookie_domain,
+                             cookie_path, mac_key, mac_algorithm, creation,
+                             expiration, creation, secure, http_only);
+}
+
+bool CanonicalCookie::IsOnPath(const std::string& url_path) const {
+
+  // A zero length would be unsafe for our trailing '/' checks, and
+  // would also make no sense for our prefix match.  The code that
+  // creates a CanonicalCookie should make sure the path is never zero length,
+  // but we double check anyway.
+  if (path_.empty())
+    return false;
+
+  // The Mozilla code broke this into three cases, based on if the cookie path
+  // was longer, the same length, or shorter than the length of the url path.
+  // I think the approach below is simpler.
+
+  // Make sure the cookie path is a prefix of the url path.  If the
+  // url path is shorter than the cookie path, then the cookie path
+  // can't be a prefix.
+  if (url_path.find(path_) != 0)
+    return false;
+
+  // Now we know that url_path is >= cookie_path, and that cookie_path
+  // is a prefix of url_path.  If they are the are the same length then
+  // they are identical, otherwise we need an additional check:
+
+  // In order to avoid in correctly matching a cookie path of /blah
+  // with a request path of '/blahblah/', we need to make sure that either
+  // the cookie path ends in a trailing '/', or that we prefix up to a '/'
+  // in the url path.  Since we know that the url path length is greater
+  // than the cookie path length, it's safe to index one byte past.
+  if (path_.length() != url_path.length() &&
+      path_[path_.length() - 1] != '/' &&
+      url_path[path_.length()] != '/')
+    return false;
+
+  return true;
+}
+
+bool CanonicalCookie::IsDomainMatch(const std::string& scheme,
+                                    const std::string& host) const {
+  // Can domain match in two ways; as a domain cookie (where the cookie
+  // domain begins with ".") or as a host cookie (where it doesn't).
+
+  // Some consumers of the CookieMonster expect to set cookies on
+  // URLs like http://.strange.url.  To retrieve cookies in this instance,
+  // we allow matching as a host cookie even when the domain_ starts with
+  // a period.
+  if (host == domain_)
+    return true;
+
+  // Domain cookie must have an initial ".".  To match, it must be
+  // equal to url's host with initial period removed, or a suffix of
+  // it.
+
+  // Arguably this should only apply to "http" or "https" cookies, but
+  // extension cookie tests currently use the funtionality, and if we
+  // ever decide to implement that it should be done by preventing
+  // such cookies from being set.
+  if (domain_.empty() || domain_[0] != '.')
+    return false;
+
+  // The host with a "." prefixed.
+  if (domain_.compare(1, std::string::npos, host) == 0)
+    return true;
+
+  // A pure suffix of the host (ok since we know the domain already
+  // starts with a ".")
+  return (host.length() > domain_.length() &&
+          host.compare(host.length() - domain_.length(),
+                       domain_.length(), domain_) == 0);
+}
+
+std::string CanonicalCookie::DebugString() const {
+  return base::StringPrintf(
+      "name: %s value: %s domain: %s path: %s creation: %"
+      PRId64,
+      name_.c_str(), value_.c_str(),
+      domain_.c_str(), path_.c_str(),
+      static_cast<int64>(creation_date_.ToTimeT()));
+}
+
+}  // namespace