remwharead/include/uri.hpp

159 lines
3.9 KiB
C++

/* This file is part of remwharead.
* Copyright © 2019 tastytea <tastytea@tastytea.de>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, version 3.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef REMWHAREAD_URI_HPP
#define REMWHAREAD_URI_HPP
#include <string>
namespace remwharead
{
using std::string;
/*!
* @brief A processed HTML page.
*
* @return true if successful, when cast to bool.
*
* @since 0.7.0
*
* @headerfile uri.hpp remwharead/uri.hpp
*/
typedef struct html_extract
{
bool successful = false;
string error;
string title;
string description;
string fulltext;
operator bool();
} html_extract;
/*!
* @brief The result of the call to the archive service.
*
* @return true if successful, when cast to bool.
*
* @since 0.7.0
*
* @headerfile uri.hpp remwharead/uri.hpp
*/
typedef struct archive_answer
{
bool successful = false;
string error;
string uri;
operator bool();
} archive_answer;
/*!
* @brief Download, archive and process an %URI.
*
* @since 0.6.0
*
* @headerfile uri.hpp remwharead/uri.hpp
*/
class URI
{
public:
/*!
* @brief Construct object and set URL.
*
* Initializes TLS and sets proxy from the environment variable
* `http_proxy`, if possible.
*
* @since 0.6.0
*/
explicit URI(const string &uri);
virtual ~URI();
/*!
* @brief Download %URI and extract title, description and full text.
*
* @since 0.6.0
*/
const html_extract get();
/*!
* @brief Save %URI in archive and return archive-URI.
*
* @since 0.6.0
*/
const archive_answer archive();
protected:
string _uri;
/*!
* @brief Make a HTTP(S) request.
*
* @since 0.6.0
*/
const string make_request(const string &uri,
bool archive = false) const;
/*!
* @brief Extract the title from an HTML page.
*
* @since 0.6.0
*/
const string extract_title(const string &html);
/*!
* @brief Extract the description from an HTML page.
*
* @since 0.6.0
*/
const string extract_description(const string &html);
/*!
* @brief Removes HTML tags and superflous spaces from an HTML page.
*
* @since 0.6.0
*/
const string strip_html(const string &html);
/*!
* @brief Remove HTML tags.
*
* @param html HTML page.
* @param tag If set, only remove this tag.
*
* @since 0.6.0
*/
const string remove_html_tags(const string &html,
const string &tag = "");
/*!
* @brief Convert HTML entities to UTF-8.
*
* @since 0.6.0
*/
const string unescape_html(const string &html);
/*!
* @brief Replace newlines with spaces.
*
* @since 0.6.0
*/
const string remove_newlines(string text);
};
}
#endif // REMWHAREAD_URI_HPP