mirror of
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210 lines
7.8 KiB
C++
210 lines
7.8 KiB
C++
// Copyright 2013 The Chromium Authors
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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// Functions to canonicalize "standard" URLs, which are ones that have an
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// authority section including a host name.
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#include "url/url_canon.h"
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#include "url/url_canon_internal.h"
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#include "url/url_constants.h"
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namespace url {
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namespace {
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template <typename CHAR, typename UCHAR>
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bool DoCanonicalizeStandardURL(const URLComponentSource<CHAR>& source,
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const Parsed& parsed,
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SchemeType scheme_type,
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CharsetConverter* query_converter,
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CanonOutput* output,
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Parsed* new_parsed) {
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// Scheme: this will append the colon.
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bool success = CanonicalizeScheme(source.scheme, parsed.scheme,
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output, &new_parsed->scheme);
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bool scheme_supports_user_info =
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(scheme_type == SCHEME_WITH_HOST_PORT_AND_USER_INFORMATION);
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bool scheme_supports_ports =
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(scheme_type == SCHEME_WITH_HOST_PORT_AND_USER_INFORMATION ||
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scheme_type == SCHEME_WITH_HOST_AND_PORT);
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// Authority (username, password, host, port)
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bool have_authority;
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if ((scheme_supports_user_info &&
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(parsed.username.is_valid() || parsed.password.is_valid())) ||
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parsed.host.is_nonempty() ||
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(scheme_supports_ports && parsed.port.is_valid())) {
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have_authority = true;
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// Only write the authority separators when we have a scheme.
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if (parsed.scheme.is_valid()) {
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output->push_back('/');
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output->push_back('/');
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}
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// User info: the canonicalizer will handle the : and @.
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if (scheme_supports_user_info) {
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success &= CanonicalizeUserInfo(
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source.username, parsed.username, source.password, parsed.password,
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output, &new_parsed->username, &new_parsed->password);
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} else {
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new_parsed->username.reset();
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new_parsed->password.reset();
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}
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success &= CanonicalizeHost(source.host, parsed.host,
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output, &new_parsed->host);
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// Host must not be empty for standard URLs.
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if (parsed.host.is_empty())
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success = false;
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// Port: the port canonicalizer will handle the colon.
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if (scheme_supports_ports) {
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int default_port = DefaultPortForScheme(
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&output->data()[new_parsed->scheme.begin], new_parsed->scheme.len);
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success &= CanonicalizePort(source.port, parsed.port, default_port,
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output, &new_parsed->port);
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} else {
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new_parsed->port.reset();
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}
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} else {
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// No authority, clear the components.
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have_authority = false;
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new_parsed->host.reset();
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new_parsed->username.reset();
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new_parsed->password.reset();
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new_parsed->port.reset();
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success = false; // Standard URLs must have an authority.
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}
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// Path
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if (parsed.path.is_valid()) {
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success &= CanonicalizePath(source.path, parsed.path,
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output, &new_parsed->path);
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} else if (have_authority ||
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parsed.query.is_valid() || parsed.ref.is_valid()) {
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// When we have an empty path, make up a path when we have an authority
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// or something following the path. The only time we allow an empty
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// output path is when there is nothing else.
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new_parsed->path = Component(output->length(), 1);
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output->push_back('/');
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} else {
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// No path at all
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new_parsed->path.reset();
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}
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// Query
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CanonicalizeQuery(source.query, parsed.query, query_converter,
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output, &new_parsed->query);
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// Ref: ignore failure for this, since the page can probably still be loaded.
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CanonicalizeRef(source.ref, parsed.ref, output, &new_parsed->ref);
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// Carry over the flag for potentially dangling markup:
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if (parsed.potentially_dangling_markup)
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new_parsed->potentially_dangling_markup = true;
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return success;
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}
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} // namespace
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// Returns the default port for the given canonical scheme, or PORT_UNSPECIFIED
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// if the scheme is unknown.
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//
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// Please keep blink::DefaultPortForProtocol and url::DefaultPortForProtocol in
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// sync.
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int DefaultPortForScheme(const char* scheme, int scheme_len) {
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int default_port = PORT_UNSPECIFIED;
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switch (scheme_len) {
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case 4:
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if (!strncmp(scheme, kHttpScheme, scheme_len))
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default_port = 80;
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break;
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case 5:
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if (!strncmp(scheme, kHttpsScheme, scheme_len))
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default_port = 443;
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break;
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case 3:
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if (!strncmp(scheme, kFtpScheme, scheme_len))
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default_port = 21;
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else if (!strncmp(scheme, kWssScheme, scheme_len))
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default_port = 443;
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break;
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case 2:
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if (!strncmp(scheme, kWsScheme, scheme_len))
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default_port = 80;
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break;
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}
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return default_port;
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}
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bool CanonicalizeStandardURL(const char* spec,
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int spec_len,
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const Parsed& parsed,
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SchemeType scheme_type,
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CharsetConverter* query_converter,
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CanonOutput* output,
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Parsed* new_parsed) {
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return DoCanonicalizeStandardURL<char, unsigned char>(
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URLComponentSource<char>(spec), parsed, scheme_type, query_converter,
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output, new_parsed);
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}
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bool CanonicalizeStandardURL(const char16_t* spec,
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int spec_len,
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const Parsed& parsed,
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SchemeType scheme_type,
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CharsetConverter* query_converter,
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CanonOutput* output,
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Parsed* new_parsed) {
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return DoCanonicalizeStandardURL<char16_t, char16_t>(
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URLComponentSource<char16_t>(spec), parsed, scheme_type, query_converter,
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output, new_parsed);
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}
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// It might be nice in the future to optimize this so unchanged components don't
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// need to be recanonicalized. This is especially true since the common case for
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// ReplaceComponents is removing things we don't want, like reference fragments
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// and usernames. These cases can become more efficient if we can assume the
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// rest of the URL is OK with these removed (or only the modified parts
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// recanonicalized). This would be much more complex to implement, however.
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//
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// You would also need to update DoReplaceComponents in url_util.cc which
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// relies on this re-checking everything (see the comment there for why).
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bool ReplaceStandardURL(const char* base,
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const Parsed& base_parsed,
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const Replacements<char>& replacements,
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SchemeType scheme_type,
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CharsetConverter* query_converter,
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CanonOutput* output,
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Parsed* new_parsed) {
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URLComponentSource<char> source(base);
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Parsed parsed(base_parsed);
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SetupOverrideComponents(base, replacements, &source, &parsed);
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return DoCanonicalizeStandardURL<char, unsigned char>(
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source, parsed, scheme_type, query_converter, output, new_parsed);
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}
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// For 16-bit replacements, we turn all the replacements into UTF-8 so the
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// regular code path can be used.
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bool ReplaceStandardURL(const char* base,
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const Parsed& base_parsed,
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const Replacements<char16_t>& replacements,
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SchemeType scheme_type,
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CharsetConverter* query_converter,
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CanonOutput* output,
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Parsed* new_parsed) {
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RawCanonOutput<1024> utf8;
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URLComponentSource<char> source(base);
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Parsed parsed(base_parsed);
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SetupUTF16OverrideComponents(base, replacements, &utf8, &source, &parsed);
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return DoCanonicalizeStandardURL<char, unsigned char>(
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source, parsed, scheme_type, query_converter, output, new_parsed);
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}
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} // namespace url
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