101 lines
2.8 KiB
C++
101 lines
2.8 KiB
C++
/* This file is part of mastodonpp.
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* Copyright © 2020 tastytea <tastytea@tastytea.de>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation, version 3.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "log.hpp"
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#include "types.hpp"
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#include <algorithm>
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#include <cctype>
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namespace mastodonpp
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{
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using std::search;
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using std::tolower;
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answer_type::operator bool() const
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{
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return (curl_error_code == 0 && http_status == 200);
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}
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answer_type::operator string_view() const
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{
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return body;
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}
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std::ostream &operator <<(std::ostream &out, const answer_type &answer)
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{
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out << answer.body;
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return out;
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}
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string_view answer_type::get_header(const string_view field) const
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{
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const string_view searchstring{string(field) += ':'};
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auto it{search(headers.begin(), headers.end(),
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searchstring.begin(), searchstring.end(),
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[](unsigned char a, unsigned char b)
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{ return tolower(a) == tolower(b); })};
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if (it != headers.end())
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{
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auto pos{static_cast<size_t>(it - headers.begin())};
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pos = headers.find(':', pos) + 2;
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const auto endpos{headers.find('\n', pos)};
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return string_view(&headers[pos], endpos - pos);
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}
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return {};
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}
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parametermap answer_type::parse_pagination(const bool next) const
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{
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const string_view link{get_header("Link")};
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if (link.empty())
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{
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return {};
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}
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const auto direction{next ? R"(rel="next")" : R"(rel="prev")"};
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auto endpos{link.find(direction)};
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endpos = link.rfind('>', endpos);
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auto startpos{link.rfind('?', endpos) + 1};
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const string_view paramstr{link.substr(startpos, endpos - startpos)};
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debuglog << "Found parameters in Link header: " << paramstr << '\n';
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startpos = 0;
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parametermap parameters;
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while ((endpos = paramstr.find('=', startpos)) != string_view::npos)
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{
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parameterpair param;
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param.first = paramstr.substr(startpos, endpos - startpos);
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startpos = endpos + 1;
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endpos = paramstr.find('&', startpos);
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param.second = paramstr.substr(startpos, endpos - startpos);
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parameters.insert(param);
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if (endpos == string_view::npos)
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{
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break;
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}
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startpos = endpos + 1;
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}
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return parameters;
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}
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} // namespace mastodonpp
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