| // 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(); |
| int end = component.end(); |
| for (int i = 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(); |
| // We allow path URLs to have the path, query and fragment components, but we |
| // will canonicalize each of the 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); |
| DoCanonicalizePathComponent<CHAR, UCHAR>(source.query, parsed.query, '?', |
| output, &new_parsed->query); |
| DoCanonicalizePathComponent<CHAR, UCHAR>(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 base::char16* spec, |
| int spec_len, |
| const Parsed& parsed, |
| CanonOutput* output, |
| Parsed* new_parsed) { |
| return DoCanonicalizePathURL<base::char16, base::char16>( |
| URLComponentSource<base::char16>(spec), parsed, output, new_parsed); |
| } |
| |
| 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<base::char16>& 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 |