opendht/tools/durl.cpp

/*
 *  Copyright (C) 2014-2020 Savoir-faire Linux Inc.
 *
 *  Authors: Adrien Béraud <adrien.beraud@savoirfairelinux.com>
 *
 *  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; either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  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 <https://www.gnu.org/licenses/>.
 */
#include <opendht/http.h>
#include <opendht/log.h>

#include <asio/io_context.hpp>
#ifndef _MSC_VER
#include <getopt.h>
#else
#include "wingetopt.h"
#endif

using namespace dht;

void print_info() {
    std::cout << "durl, a simple http(s) client." << std::endl;
    std::cout << "Report bugs to: https://opendht.net" << std::endl;
}

void print_version() {
    std::cout << "OpenDHT version " << dht::version() << std::endl;
    print_info();
}

void print_usage() {
    std::cout << "Usage: durl url" << std::endl << std::endl;
    print_info();
}

static const constexpr struct option long_options[] = {
    {"help",                no_argument      , nullptr, 'h'},
    {"headers",             no_argument      , nullptr, 'H'},
    {"verbose",             no_argument      , nullptr, 'v'},
    {"version",             no_argument      , nullptr, 'V'},
    {nullptr,               0                , nullptr,  0}
};

struct durl_params {
    std::string url;
    bool help {false};
    bool log {false};
    bool headers {false};
    bool version {false};
};

durl_params
parseArgs(int argc, char **argv) {
    durl_params params;
    int opt;
    while ((opt = getopt_long(argc, argv, "hvVH", long_options, nullptr)) != -1) {
        switch (opt) {
        case 'V':
            params.version = true;
            break;
        case 'h':
            params.help = true;
            break;
        case 'H':
            params.headers = true;
            break;
        case 'v':
            params.log = true;
            break;
        default:
            break;
        }
    }
    
    if (optind < argc) {
        params.url = argv[optind++];
    }

    return params;
}

int
main(int argc, char **argv)
{
    auto params = parseArgs(argc, argv);
    if (params.help) {
        print_usage();
        return 0;
    }
    if (params.version) {
        print_version();
        return 0;
    }

    std::shared_ptr<dht::Logger> logger;
    if (params.log) {
        logger = dht::log::getStdLogger();
    }

    asio::io_context ctx;
    auto request = std::make_shared<dht::http::Request>(ctx, params.url, [&](const dht::http::Response& response){
        if (params.headers) {
            for (const auto& header : response.headers)
                std::cout << header.first << ": " << header.second << std::endl;
            std::cout << std::endl;
        }
        std::cout << response.body << std::endl;
        ctx.stop();
    }, logger);
    request->send();
    auto work = asio::make_work_guard(ctx);
    ctx.run();
    return 0;
}