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// Copyright 2015 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 "url/scheme_host_port.h"
#include <stdint.h>
#include <string.h>
#include <tuple>
#include "base/logging.h"
#include "base/numerics/safe_conversions.h"
#include "base/strings/string_number_conversions.h"
#include "url/gurl.h"
#include "url/url_canon.h"
#include "url/url_canon_stdstring.h"
#include "url/url_constants.h"
#include "url/url_util.h"
namespace url {
namespace {
bool IsCanonicalHost(const base::StringPiece& host) {
std::string canon_host;
// Try to canonicalize the host (copy/pasted from net/base. :( ).
const Component raw_host_component(0,
base::checked_cast<int>(host.length()));
StdStringCanonOutput canon_host_output(&canon_host);
CanonHostInfo host_info;
CanonicalizeHostVerbose(host.data(), raw_host_component,
&canon_host_output, &host_info);
if (host_info.out_host.is_nonempty() &&
host_info.family != CanonHostInfo::BROKEN) {
// Success! Assert that there's no extra garbage.
canon_host_output.Complete();
DCHECK_EQ(host_info.out_host.len, static_cast<int>(canon_host.length()));
} else {
// Empty host, or canonicalization failed.
canon_host.clear();
}
return host == canon_host;
}
bool IsValidInput(const base::StringPiece& scheme,
const base::StringPiece& host,
uint16_t port) {
SchemeType scheme_type = SCHEME_WITH_PORT;
bool is_standard = GetStandardSchemeType(
scheme.data(),
Component(0, base::checked_cast<int>(scheme.length())),
&scheme_type);
if (!is_standard)
return false;
// These schemes do not follow the generic URL syntax, so we treat them as
// invalid (scheme, host, port) tuples (even though such URLs' _Origin_ might
// have a (scheme, host, port) tuple, they themselves do not).
if (scheme == kFileSystemScheme || scheme == kBlobScheme)
return false;
switch (scheme_type) {
case SCHEME_WITH_PORT:
// A URL with |scheme| is required to have the host and port (may be
// omitted in a serialization if it's the same as the default value).
// Return an invalid instance if either of them is not given.
if (host.empty() || port == 0)
return false;
if (!IsCanonicalHost(host))
return false;
return true;
case SCHEME_WITHOUT_PORT:
if (port != 0) {
// Return an invalid object if a URL with the scheme never represents
// the port data but the given |port| is non-zero.
return false;
}
if (!IsCanonicalHost(host))
return false;
return true;
case SCHEME_WITHOUT_AUTHORITY:
return false;
default:
NOTREACHED();
return false;
}
}
} // namespace
SchemeHostPort::SchemeHostPort() : port_(0) {
}
SchemeHostPort::SchemeHostPort(base::StringPiece scheme,
base::StringPiece host,
uint16_t port)
: port_(0) {
if (!IsValidInput(scheme, host, port))
return;
scheme.CopyToString(&scheme_);
host.CopyToString(&host_);
port_ = port;
}
SchemeHostPort::SchemeHostPort(const GURL& url) : port_(0) {
if (!url.is_valid())
return;
base::StringPiece scheme = url.scheme_piece();
base::StringPiece host = url.host_piece();
// A valid GURL never returns PORT_INVALID.
int port = url.EffectiveIntPort();
if (port == PORT_UNSPECIFIED)
port = 0;
if (!IsValidInput(scheme, host, port))
return;
scheme.CopyToString(&scheme_);
host.CopyToString(&host_);
port_ = port;
}
SchemeHostPort::~SchemeHostPort() {
}
bool SchemeHostPort::IsInvalid() const {
return scheme_.empty() && host_.empty() && !port_;
}
std::string SchemeHostPort::Serialize() const {
std::string result;
if (IsInvalid())
return result;
result.append(scheme_);
result.append(kStandardSchemeSeparator);
result.append(host_);
if (port_ == 0)
return result;
// Omit the port component if the port matches with the default port
// defined for the scheme, if any.
int default_port = DefaultPortForScheme(scheme_.data(),
static_cast<int>(scheme_.length()));
if (default_port == PORT_UNSPECIFIED)
return result;
if (port_ != default_port) {
result.push_back(':');
result.append(base::UintToString(port_));
}
return result;
}
bool SchemeHostPort::Equals(const SchemeHostPort& other) const {
return port_ == other.port() && scheme_ == other.scheme() &&
host_ == other.host();
}
bool SchemeHostPort::operator<(const SchemeHostPort& other) const {
return std::tie(port_, scheme_, host_) <
std::tie(other.port_, other.scheme_, other.host_);
}
} // namespace url
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