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- // Copyright 2013 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.
- // Functions for canonicalizing "path" URLs. Not to be confused with the path
- // of a URL, these are URLs that have no authority section, only a path. For
- // example, "javascript:" and "data:".
- #include "url/url_canon.h"
- #include "url/url_canon_internal.h"
- namespace url {
- namespace {
- // Canonicalize the given |component| from |source| into |output| and
- // |new_component|. If |separator| is non-zero, it is pre-pended to |output|
- // prior to the canonicalized component; i.e. for the '?' or '#' characters.
- template <typename CHAR, typename UCHAR>
- void DoCanonicalizePathComponent(const CHAR* source,
- const Component& component,
- char separator,
- CanonOutput* output,
- Component* new_component) {
- if (component.is_valid()) {
- if (separator)
- output->push_back(separator);
- // Copy the path using path URL's more lax escaping rules (think for
- // javascript:). We convert to UTF-8 and escape characters from the
- // C0 control percent-encode set, but leave all other characters alone.
- // This helps readability of JavaScript.
- // https://url.spec.whatwg.org/#cannot-be-a-base-url-path-state
- // https://url.spec.whatwg.org/#c0-control-percent-encode-set
- new_component->begin = output->length();
- size_t end = static_cast<size_t>(component.end());
- for (size_t i = static_cast<size_t>(component.begin); i < end; i++) {
- UCHAR uch = static_cast<UCHAR>(source[i]);
- if (uch < 0x20 || uch > 0x7E)
- AppendUTF8EscapedChar(source, &i, end, output);
- else
- output->push_back(static_cast<char>(uch));
- }
- new_component->len = output->length() - new_component->begin;
- } else {
- // Empty part.
- new_component->reset();
- }
- }
- template <typename CHAR, typename UCHAR>
- bool DoCanonicalizePathURL(const URLComponentSource<CHAR>& source,
- const Parsed& parsed,
- CanonOutput* output,
- Parsed* new_parsed) {
- // Scheme: this will append the colon.
- bool success = CanonicalizeScheme(source.scheme, parsed.scheme,
- output, &new_parsed->scheme);
- // We assume there's no authority for path URLs. Note that hosts should never
- // have -1 length.
- new_parsed->username.reset();
- new_parsed->password.reset();
- new_parsed->host.reset();
- new_parsed->port.reset();
- // Canonicalize path via the weaker path URL rules.
- //
- // Note: parsing the path part should never cause a failure, see
- // https://url.spec.whatwg.org/#cannot-be-a-base-url-path-state
- DoCanonicalizePathComponent<CHAR, UCHAR>(source.path, parsed.path, '\0',
- output, &new_parsed->path);
- // Similar to mailto:, always use the default UTF-8 charset converter for
- // query.
- CanonicalizeQuery(source.query, parsed.query, nullptr, output,
- &new_parsed->query);
- CanonicalizeRef(source.ref, parsed.ref, output, &new_parsed->ref);
- return success;
- }
- } // namespace
- bool CanonicalizePathURL(const char* spec,
- int spec_len,
- const Parsed& parsed,
- CanonOutput* output,
- Parsed* new_parsed) {
- return DoCanonicalizePathURL<char, unsigned char>(
- URLComponentSource<char>(spec), parsed, output, new_parsed);
- }
- bool CanonicalizePathURL(const char16_t* spec,
- int spec_len,
- const Parsed& parsed,
- CanonOutput* output,
- Parsed* new_parsed) {
- return DoCanonicalizePathURL<char16_t, char16_t>(
- URLComponentSource<char16_t>(spec), parsed, output, new_parsed);
- }
- void CanonicalizePathURLPath(const char* source,
- const Component& component,
- CanonOutput* output,
- Component* new_component) {
- DoCanonicalizePathComponent<char, unsigned char>(source, component, '\0',
- output, new_component);
- }
- void CanonicalizePathURLPath(const char16_t* source,
- const Component& component,
- CanonOutput* output,
- Component* new_component) {
- DoCanonicalizePathComponent<char16_t, char16_t>(source, component, '\0',
- output, new_component);
- }
- bool ReplacePathURL(const char* base,
- const Parsed& base_parsed,
- const Replacements<char>& replacements,
- CanonOutput* output,
- Parsed* new_parsed) {
- URLComponentSource<char> source(base);
- Parsed parsed(base_parsed);
- SetupOverrideComponents(base, replacements, &source, &parsed);
- return DoCanonicalizePathURL<char, unsigned char>(
- source, parsed, output, new_parsed);
- }
- bool ReplacePathURL(const char* base,
- const Parsed& base_parsed,
- const Replacements<char16_t>& replacements,
- CanonOutput* output,
- Parsed* new_parsed) {
- RawCanonOutput<1024> utf8;
- URLComponentSource<char> source(base);
- Parsed parsed(base_parsed);
- SetupUTF16OverrideComponents(base, replacements, &utf8, &source, &parsed);
- return DoCanonicalizePathURL<char, unsigned char>(
- source, parsed, output, new_parsed);
- }
- } // namespace url
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