// 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.
#ifndef URL_URL_CANON_INTERNAL_FILE_H_
#define URL_URL_CANON_INTERNAL_FILE_H_
// As with url_canon_internal.h, this file is intended to be included in
// another C++ file where the template types are defined. This allows the
// programmer to use this to use these functions for their own strings
// types, without bloating the code by having inline templates used in
// every call site.
//
// *** This file must be included after url_canon_internal as we depend on some
// functions in it. ***
#include "url/url_file.h"
#include "url/url_parse_internal.h"
using namespace url_canon;
// Given a pointer into the spec, this copies and canonicalizes the drive
// letter and colon to the output, if one is found. If there is not a drive
// spec, it won't do anything. The index of the next character in the input
// spec is returned (after the colon when a drive spec is found, the begin
// offset if one is not).
template<typename CHAR>
static int FileDoDriveSpec(const CHAR* spec, int begin, int end,
CanonOutput* output) {
// The path could be one of several things: /foo/bar, c:/foo/bar, /c:/foo,
// (with backslashes instead of slashes as well).
int num_slashes = CountConsecutiveSlashes(spec, begin, end);
int after_slashes = begin + num_slashes;
if (!DoesBeginWindowsDriveSpec(spec, after_slashes, end))
return begin; // Haven't consumed any characters
// DoesBeginWindowsDriveSpec will ensure that the drive letter is valid
// and that it is followed by a colon/pipe.
// Normalize Windows drive letters to uppercase
if (spec[after_slashes] >= 'a' && spec[after_slashes] <= 'z')
output->push_back(spec[after_slashes] - 'a' + 'A');
else
output->push_back(static_cast<char>(spec[after_slashes]));
// Normalize the character following it to a colon rather than pipe.
output->push_back(':');
output->push_back('/');
return after_slashes + 2;
}
// FileDoDriveSpec will have already added the first backslash, so we need to
// write everything following the slashes using the path canonicalizer.
template<typename CHAR, typename UCHAR>
static void FileDoPath(const CHAR* spec, int begin, int end,
CanonOutput* output) {
// Normalize the number of slashes after the drive letter. The path
// canonicalizer expects the input to begin in a slash already so
// doesn't check. We want to handle no-slashes
int num_slashes = CountConsecutiveSlashes(spec, begin, end);
int after_slashes = begin + num_slashes;
// Now use the regular path canonicalizer to canonicalize the rest of the
// path. We supply it with the path following the slashes. It won't prepend
// a slash because it assumes any nonempty path already starts with one.
// We explicitly filter out calls with no path here to prevent that case.
ParsedURL::Component sub_path(after_slashes, end - after_slashes);
if (sub_path.len > 0) {
// Give it a fake output component to write into. DoCanonicalizeFile will
// compute the full path component.
ParsedURL::Component fake_output_path;
URLCanonInternal<CHAR, UCHAR>::DoPath(
spec, sub_path, output, &fake_output_path);
}
}
template<typename CHAR, typename UCHAR>
static bool DoCanonicalizeFileURL(const URLComponentSource<CHAR>& source,
const ParsedURL& parsed,
CanonOutput* output,
ParsedURL* new_parsed) {
// Things we don't set in file: URLs.
new_parsed->username = ParsedURL::Component(0, -1);
new_parsed->password = ParsedURL::Component(0, -1);
new_parsed->port = ParsedURL::Component(0, -1);
// Scheme (known, so we don't bother running it through the more
// complicated scheme canonicalizer).
new_parsed->scheme.begin = output->length();
output->push_back('f');
output->push_back('i');
output->push_back('l');
output->push_back('e');
new_parsed->scheme.len = output->length() - new_parsed->scheme.begin;
output->push_back(':');
// Write the separator for the host.
output->push_back('/');
output->push_back('/');
// Append the host. For many file URLs, this will be empty. For UNC, this
// will be present.
// TODO(brettw) This doesn't do any checking for host name validity. We
// should probably handle validity checking of UNC hosts differently than
// for regular IP hosts.
bool success = URLCanonInternal<CHAR, UCHAR>::DoHost(
source.host, parsed.host, output, &new_parsed->host);
// Write a separator for the start of the path. We'll ignore any slashes
// already at the beginning of the path.
new_parsed->path.begin = output->length();
output->push_back('/');
// Copies and normalizes the "c:" at the beginning, if present.
int after_drive = FileDoDriveSpec(source.path, parsed.path.begin,
parsed.path.end(), output);
// Copies the rest of the path
FileDoPath<CHAR, UCHAR>(source.path, after_drive, parsed.path.end(), output);
new_parsed->path.len = output->length() - new_parsed->path.begin;
// Things following the path we can use the standard canonicalizers for.
success &= URLCanonInternal<CHAR, UCHAR>::DoQuery(
source.query, parsed.query, output, &new_parsed->query);
success &= URLCanonInternal<CHAR, UCHAR>::DoRef(
source.ref, parsed.ref, output, &new_parsed->ref);
return success;
}
#endif // URL_URL_CANON_INTERNAL_FILE_H_