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url_fixer_upper.h

// Copyright (c) 2010 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 CHROME_BROWSER_NET_URL_FIXER_UPPER_H_
#define CHROME_BROWSER_NET_URL_FIXER_UPPER_H_

#include <string>

#include "googleurl/src/gurl.h"

namespace url_parse {
  struct Parsed;
}

class FilePath;

// This object is designed to convert various types of input into URLs that we
// know are valid. For example, user typing in the URL bar or command line
// options. This is NOT the place for converting between different types of
// URLs or parsing them, see net_util.h for that.
namespace URLFixerUpper {

  // Segments the given text string into parts of a URL.  This is most useful
  // for schemes such as http, https, and ftp where |SegmentURL| will find many
  // segments.  Currently does not segment "file" schemes.
  // Returns the canonicalized scheme, or the empty string when |text| is only
  // whitespace.
  std::string SegmentURL(const std::string& text, url_parse::Parsed* parts);
  // Deprecated temporary compatibility function.
  std::wstring SegmentURL(const std::wstring& text, url_parse::Parsed* parts);

  // Converts |text| to a fixed-up URL and returns it. Attempts to make
  // some "smart" adjustments to obviously-invalid input where possible.
  // |text| may be an absolute path to a file, which will get converted to a
  // "file:" URL.
  //
  // The result will be a "more" valid URL than the input. It may still not
  // be valid, so check the return value's validity or use
  // possibly_invalid_spec().
  //
  // If |desired_tld| is non-empty, it represents the TLD the user wishes to
  // append in the case of an incomplete domain.  We check that this is not a
  // file path and there does not appear to be a valid TLD already, then append
  // |desired_tld| to the domain and prepend "www." (unless it, or a scheme,
  // are already present.)  This TLD should not have a leading '.' (use "com"
  // instead of ".com").
  GURL FixupURL(const std::string& text, const std::string& desired_tld);

  // Converts |text| to a fixed-up URL, allowing it to be a relative path on
  // the local filesystem.  Begin searching in |base_dir|; if empty, use the
  // current working directory.  If this resolves to a file on disk, convert it
  // to a "file:" URL in |fixed_up_url|; otherwise, fall back to the behavior
  // of FixupURL().
  //
  // For "regular" input, even if it is possibly a file with a full path, you
  // should use FixupURL() directly.  This function should only be used when
  // relative path handling is desired, as for command line processing.
  GURL FixupRelativeFile(const FilePath& base_dir, const FilePath& text);
  // Deprecated temporary compatibility function.
  GURL FixupRelativeFile(const std::wstring& base_dir,
                         const std::wstring& text);

  // For paths like ~, we use $HOME for the current user's home
  // directory.  For tests, we allow our idea of $HOME to be overriden
  // by this variable.
  extern const char* home_directory_override;
};

#endif  // CHROME_BROWSER_NET_URL_FIXER_UPPER_H_

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