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// Copyright (c) 2009 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.
#include "net/base/force_tls_state.h"
#include "base/logging.h"
#include "base/string_tokenizer.h"
#include "base/string_util.h"
#include "googleurl/src/gurl.h"
#include "net/base/registry_controlled_domain.h"
namespace net {
ForceTLSState::ForceTLSState() {
}
void ForceTLSState::DidReceiveHeader(const GURL& url,
const std::string& value) {
// TODO(abarth): Actually parse |value| once the spec settles down.
EnableHost(url.host());
}
void ForceTLSState::EnableHost(const std::string& host) {
// TODO(abarth): Canonicalize host.
AutoLock lock(lock_);
enabled_hosts_.insert(host);
}
bool ForceTLSState::IsEnabledForHost(const std::string& host) {
// TODO(abarth): Canonicalize host.
AutoLock lock(lock_);
return enabled_hosts_.find(host) != enabled_hosts_.end();
}
// "X-Force-TLS" ":" "max-age" "=" delta-seconds *1INCLUDESUBDOMAINS
// INCLUDESUBDOMAINS = [ " includeSubDomains" ]
bool ForceTLSState::ParseHeader(const std::string& value,
int* max_age,
bool* include_subdomains) {
DCHECK(max_age);
DCHECK(include_subdomains);
int max_age_candidate;
enum ParserState {
START,
AFTER_MAX_AGE_LABEL,
AFTER_MAX_AGE_EQUALS,
AFTER_MAX_AGE,
AFTER_MAX_AGE_INCLUDE_SUB_DOMAINS_DELIMITER,
AFTER_INCLUDE_SUBDOMAINS,
} state = START;
StringTokenizer tokenizer(value, " =");
tokenizer.set_options(StringTokenizer::RETURN_DELIMS);
while (tokenizer.GetNext()) {
DCHECK(!tokenizer.token_is_delim() || tokenizer.token().length() == 1);
DCHECK(tokenizer.token_is_delim() || *tokenizer.token_begin() != ' ');
switch (state) {
case START:
if (*tokenizer.token_begin() == ' ')
continue;
if (!LowerCaseEqualsASCII(tokenizer.token(), "max-age"))
return false;
state = AFTER_MAX_AGE_LABEL;
break;
case AFTER_MAX_AGE_LABEL:
if (*tokenizer.token_begin() == ' ')
continue;
if (*tokenizer.token_begin() != '=')
return false;
DCHECK(tokenizer.token().length() == 1);
state = AFTER_MAX_AGE_EQUALS;
break;
case AFTER_MAX_AGE_EQUALS:
if (*tokenizer.token_begin() == ' ')
continue;
if (!StringToInt(tokenizer.token(), &max_age_candidate))
return false;
if (max_age_candidate < 0)
return false;
state = AFTER_MAX_AGE;
break;
case AFTER_MAX_AGE:
if (*tokenizer.token_begin() != ' ')
return false;
state = AFTER_MAX_AGE_INCLUDE_SUB_DOMAINS_DELIMITER;
break;
case AFTER_MAX_AGE_INCLUDE_SUB_DOMAINS_DELIMITER:
if (*tokenizer.token_begin() == ' ')
continue;
if (!LowerCaseEqualsASCII(tokenizer.token(), "includesubdomains"))
return false;
state = AFTER_INCLUDE_SUBDOMAINS;
break;
case AFTER_INCLUDE_SUBDOMAINS:
if (*tokenizer.token_begin() != ' ')
return false;
break;
default:
NOTREACHED();
}
}
// We've consumed all the input. Let's see what state we ended up in.
switch (state) {
case START:
case AFTER_MAX_AGE_LABEL:
case AFTER_MAX_AGE_EQUALS:
return false;
case AFTER_MAX_AGE:
case AFTER_MAX_AGE_INCLUDE_SUB_DOMAINS_DELIMITER:
*max_age = max_age_candidate;
*include_subdomains = false;
return true;
case AFTER_INCLUDE_SUBDOMAINS:
*max_age = max_age_candidate;
*include_subdomains = true;
return true;
default:
NOTREACHED();
return false;
}
}
} // namespace
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