/**
 * The MIT License (MIT)
 *
 * Copyright (c) 2013-2017 OSSRS(winlin)
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy of
 * this software and associated documentation files (the "Software"), to deal in
 * the Software without restriction, including without limitation the rights to
 * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
 * the Software, and to permit persons to whom the Software is furnished to do so,
 * subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
 * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
 * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
 * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

#include <srs_app_refer.hpp>

#include <srs_kernel_error.hpp>
#include <srs_kernel_log.hpp>
#include <srs_app_config.hpp>

SrsRefer::SrsRefer()
{
}

SrsRefer::~SrsRefer()
{
}

int SrsRefer::check(std::string page_url, SrsConfDirective* refer)
{
    int ret = ERROR_SUCCESS;
    
    if (!refer) {
        srs_verbose("ignore refer check for page_url=%s", page_url.c_str());
        return ret;
    }
    
    for (int i = 0; i < (int)refer->args.size(); i++) {
        if ((ret = check_single_refer(page_url, refer->args.at(i))) == ERROR_SUCCESS) {
            srs_verbose("check refer success. page_url=%s, refer=%s",
                        page_url.c_str(), refer->args.at(i).c_str());
            return ret;
        }
    }
    
    ret = ERROR_RTMP_ACCESS_DENIED;
    srs_error("check refer failed. ret=%d", ret);
    
    return ret;
}

int SrsRefer::check_single_refer(std::string page_url, std::string refer)
{
    int ret = ERROR_SUCCESS;
    
    size_t pos = std::string::npos;
    
    std::string domain_name = page_url;
    if ((pos = domain_name.find("://")) != std::string::npos) {
        domain_name = domain_name.substr(pos + 3);
    }
    
    if ((pos = domain_name.find("/")) != std::string::npos) {
        domain_name = domain_name.substr(0, pos);
    }
    
    if ((pos = domain_name.find(":")) != std::string::npos) {
        domain_name = domain_name.substr(0, pos);
    }
    
    pos = domain_name.find(refer);
    if (pos == std::string::npos) {
        ret = ERROR_RTMP_ACCESS_DENIED;
    }
    // match primary domain.
    if (pos != domain_name.length() - refer.length()) {
        ret = ERROR_RTMP_ACCESS_DENIED;
    }
    
    if (ret != ERROR_SUCCESS) {
        srs_verbose("access denied, page_url=%s, domain_name=%s, refer=%s, ret=%d",
                    page_url.c_str(), domain_name.c_str(), refer.c_str(), ret);
    }
    
    return ret;
}