225 lines
6.5 KiB
C++
225 lines
6.5 KiB
C++
/* This file is part of FediBlock-backend.
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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 "rss.hpp"
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#include "cgi.hpp"
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#include "files.hpp"
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#include "git.hpp"
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#include "time.hpp"
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#include <fmt/format.h>
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#include <pugixml.hpp>
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#include <algorithm>
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#include <chrono>
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#include <cstdint>
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#include <cstdlib>
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#include <exception>
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#include <iostream>
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#include <ostream>
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#include <stdexcept>
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#include <string>
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#include <string_view>
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#include <vector>
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namespace FediBlock::rss
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{
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using fmt::format;
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using std::find;
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using std::getenv;
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using std::none_of;
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using std::ostream;
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using std::string;
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using std::string_view;
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using std::uint8_t;
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using std::chrono::system_clock;
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void write_rss(ostream &out, const vector<entry_type> &entries,
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const vector<string> &tags)
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{
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string selfurl;
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char *env{getenv("HTTPS")};
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if (env == nullptr || string(env) != "on")
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{
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selfurl = "http://";
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}
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else
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{
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selfurl = "https://";
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}
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env = getenv("SERVER_NAME");
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if (env != nullptr)
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{
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selfurl += env;
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}
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const string baseurl{selfurl + "/blocklist/"};
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env = getenv("REQUEST_URI");
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if (env != nullptr)
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{
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selfurl += env;
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}
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constexpr string_view rss_time_format{"%a, %d %b %Y %T %z"};
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pugi::xml_document doc;
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auto rss{doc.append_child("rss")};
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rss.append_attribute("version") = "2.0";
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rss.append_attribute("xmlns:atom") = "http://www.w3.org/2005/Atom";
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auto channel{rss.append_child("channel")};
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string tmp_title{"FediBlock: "};
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string tmp_description{"The newest FediBlock entries. "};
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if (tags.empty())
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{
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tmp_title += "All tags";
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tmp_description += "All tags";
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}
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else
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{
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tmp_description += "Tags: ";
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}
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for (const auto &tag : tags)
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{
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if (tag != *tags.begin())
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{
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tmp_title += ", ";
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tmp_description += ", ";
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}
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tmp_title += tag;
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tmp_description += tag;
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}
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tmp_description += ".";
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auto title{channel.append_child("title")};
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title.text() = tmp_title.c_str();
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auto link{channel.append_child("link")};
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link.text() = baseurl.c_str();
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auto description{channel.append_child("description")};
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description.text() = tmp_description.c_str();
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auto lastBuildDate{channel.append_child("lastBuildDate")};
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lastBuildDate.text() = time::to_string(system_clock::now(), rss_time_format)
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.c_str();
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for (const auto &entry : entries)
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{
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// If tags are specified and none of them match, go to the next entry.
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if (!tags.empty())
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{
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// clang-format off
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if (none_of(entry.tags.begin(), entry.tags.end(),
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[&tags](const auto &tag)
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{
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return find(tags.begin(), tags.end(), tag)
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!= tags.end();
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}))
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{
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continue;
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}
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// clang-format on
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}
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auto item{channel.append_child("item")};
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auto item_title{item.append_child("title")};
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item_title.text() = entry.instance.c_str();
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auto item_guid{item.append_child("guid")};
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item_guid.append_attribute("isPermaLink") = "false";
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item_guid.text() = format("FediBlock: {:s} {:s}", entry.report_time,
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entry.instance)
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.c_str();
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auto item_pubDate{item.append_child("pubDate")};
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item_pubDate.text() = time::to_string(entry.report_time,
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rss_time_format)
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.c_str();
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auto item_link{item.append_child("link")};
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item_link.text() = format("{:s}#{:s}", baseurl, entry.instance).c_str();
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string tmp_item_description{format("<p>{:s}</p>"
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"<p><strong>Tags:</strong> ",
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cgi::text2html(entry.description))};
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for (const auto &tag : entry.tags)
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{
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if (tag != *entry.tags.begin())
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{
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tmp_item_description += ", ";
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}
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tmp_item_description += tag;
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}
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tmp_item_description += "</p><strong>Receipts:</strong><ul>";
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for (const auto &receipt : entry.receipts)
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{
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tmp_item_description += format(
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"<li><a href=\"{0:s}\">{0:s}</a></li>", receipt);
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}
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tmp_item_description += "</ul>";
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if (!entry.screenshot_filepath.empty())
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{
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tmp_item_description += "<p><strong>Screenshot:</strong><br>";
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tmp_item_description += format(
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"<a href=\"{0:s}{1:s}\"><img "
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"src=\"{0:s}{1:s}\" height=\"200\"></a></p>\n",
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baseurl, entry.screenshot_filepath);
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}
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auto item_description{item.append_child("description")};
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item_description.append_child(pugi::node_cdata)
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.set_value(tmp_item_description.c_str());
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}
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doc.print(out);
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}
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} // namespace FediBlock::rss
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using std::cerr;
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using std::cout;
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using std::exception;
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using std::runtime_error;
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using std::vector;
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using namespace FediBlock;
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using namespace FediBlock::rss;
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int main(int argc, char *argv[])
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{
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const vector<string_view> args(argv, argv + argc);
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git::init(true);
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bool remove_lockfile{false};
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try
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{
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try
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{
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git::update_cached_repo();
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remove_lockfile = true;
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}
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catch (const runtime_error &)
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{
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// Ignore, use old version of repo.
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}
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const auto entries{files::read_json_files(true)};
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cout << "Content-Type: application/rss+xml\r\n\r\n";
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write_rss(cout, entries, cgi::get_tags());
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}
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catch (const exception &e)
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{
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cerr << "Error: " << e.what() << '\n';
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}
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git::cleanup(remove_lockfile);
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return 0;
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}
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