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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_canon {
namespace {
// Canonicalize the given |component| from |source| into |output| and
// |new_component|. If |separator| is non-zero, it is pre-pended to |ouput|
// prior to the canonicalized component; i.e. for the '?' or '#' characters.
template<typename CHAR, typename UCHAR>
bool DoCanonicalizePathComponent(const CHAR* source,
const url_parse::Component& component,
CHAR seperator,
CanonOutput* output,
url_parse::Component* new_component) {
bool success = true;
if (component.is_valid()) {
if (seperator)
output->push_back(seperator);
// Copy the path using path URL's more lax escaping rules (think for
// javascript:). We convert to UTF-8 and escape non-ASCII, but leave all
// ASCII characters alone. This helps readability of JavaStript.
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 >= 0x80)
success &= 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();
}
return success;
}
template<typename CHAR, typename UCHAR>
bool DoCanonicalizePathURL(const URLComponentSource<CHAR>& source,
const url_parse::Parsed& parsed,
CanonOutput* output,
url_parse::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.
success &= DoCanonicalizePathComponent<CHAR, UCHAR>(
source.path, parsed.path, 0, output, &new_parsed->path);
success &= DoCanonicalizePathComponent<CHAR, UCHAR>(
source.query, parsed.query, '?', output, &new_parsed->query);
success &= DoCanonicalizePathComponent<CHAR, UCHAR>(
source.ref, parsed.ref, '#', output, &new_parsed->ref);
return success;
}
} // namespace
bool CanonicalizePathURL(const char* spec,
int spec_len,
const url_parse::Parsed& parsed,
CanonOutput* output,
url_parse::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 url_parse::Parsed& parsed,
CanonOutput* output,
url_parse::Parsed* new_parsed) {
return DoCanonicalizePathURL<base::char16, base::char16>(
URLComponentSource<base::char16>(spec), parsed, output, new_parsed);
}
bool ReplacePathURL(const char* base,
const url_parse::Parsed& base_parsed,
const Replacements<char>& replacements,
CanonOutput* output,
url_parse::Parsed* new_parsed) {
URLComponentSource<char> source(base);
url_parse::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 url_parse::Parsed& base_parsed,
const Replacements<base::char16>& replacements,
CanonOutput* output,
url_parse::Parsed* new_parsed) {
RawCanonOutput<1024> utf8;
URLComponentSource<char> source(base);
url_parse::Parsed parsed(base_parsed);
SetupUTF16OverrideComponents(base, replacements, &utf8, &source, &parsed);
return DoCanonicalizePathURL<char, unsigned char>(
source, parsed, output, new_parsed);
}
} // namespace url_canon
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