mirror of
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122 lines
4.6 KiB
C++
122 lines
4.6 KiB
C++
// Copyright 2013 The Chromium Authors. All rights reserved.
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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 for canonicalizing "path" URLs. Not to be confused with the path
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// of a URL, these are URLs that have no authority section, only a path. For
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// example, "javascript:" and "data:".
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#include "url/url_canon.h"
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#include "url/url_canon_internal.h"
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namespace url {
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namespace {
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// Canonicalize the given |component| from |source| into |output| and
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// |new_component|. If |separator| is non-zero, it is pre-pended to |output|
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// prior to the canonicalized component; i.e. for the '?' or '#' characters.
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template<typename CHAR, typename UCHAR>
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bool DoCanonicalizePathComponent(const CHAR* source,
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const Component& component,
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char separator,
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CanonOutput* output,
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Component* new_component) {
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bool success = true;
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if (component.is_valid()) {
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if (separator)
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output->push_back(separator);
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// Copy the path using path URL's more lax escaping rules (think for
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// javascript:). We convert to UTF-8 and escape non-ASCII, but leave all
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// ASCII characters alone. This helps readability of JavaStript.
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new_component->begin = output->length();
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int end = component.end();
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for (int i = component.begin; i < end; i++) {
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UCHAR uch = static_cast<UCHAR>(source[i]);
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if (uch < 0x20 || uch >= 0x80)
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success &= AppendUTF8EscapedChar(source, &i, end, output);
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else
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output->push_back(static_cast<char>(uch));
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}
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new_component->len = output->length() - new_component->begin;
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} else {
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// Empty part.
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new_component->reset();
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}
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return success;
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}
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template <typename CHAR, typename UCHAR>
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bool DoCanonicalizePathURL(const URLComponentSource<CHAR>& source,
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const Parsed& parsed,
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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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// We assume there's no authority for path URLs. Note that hosts should never
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// have -1 length.
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new_parsed->username.reset();
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new_parsed->password.reset();
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new_parsed->host.reset();
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new_parsed->port.reset();
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// We allow path URLs to have the path, query and fragment components, but we
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// will canonicalize each of the via the weaker path URL rules.
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success &= DoCanonicalizePathComponent<CHAR, UCHAR>(
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source.path, parsed.path, '\0', output, &new_parsed->path);
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success &= DoCanonicalizePathComponent<CHAR, UCHAR>(
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source.query, parsed.query, '?', output, &new_parsed->query);
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success &= DoCanonicalizePathComponent<CHAR, UCHAR>(
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source.ref, parsed.ref, '#', output, &new_parsed->ref);
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return success;
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}
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} // namespace
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bool CanonicalizePathURL(const char* spec,
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int spec_len,
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const Parsed& parsed,
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CanonOutput* output,
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Parsed* new_parsed) {
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return DoCanonicalizePathURL<char, unsigned char>(
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URLComponentSource<char>(spec), parsed, output, new_parsed);
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}
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bool CanonicalizePathURL(const base::char16* spec,
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int spec_len,
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const Parsed& parsed,
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CanonOutput* output,
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Parsed* new_parsed) {
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return DoCanonicalizePathURL<base::char16, base::char16>(
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URLComponentSource<base::char16>(spec), parsed, output, new_parsed);
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}
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bool ReplacePathURL(const char* base,
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const Parsed& base_parsed,
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const Replacements<char>& replacements,
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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 DoCanonicalizePathURL<char, unsigned char>(
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source, parsed, output, new_parsed);
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}
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bool ReplacePathURL(const char* base,
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const Parsed& base_parsed,
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const Replacements<base::char16>& replacements,
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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 DoCanonicalizePathURL<char, unsigned char>(
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source, parsed, output, new_parsed);
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}
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} // namespace url
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