//
// Copyright (c) 2013-2023 The SRS Authors
//
// SPDX-License-Identifier: MIT or MulanPSL-2.0
//

#include <srs_app_refer.hpp>

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

SrsRefer::SrsRefer()
{
}

SrsRefer::~SrsRefer()
{
}

srs_error_t SrsRefer::check(std::string page_url, SrsConfDirective* refer)
{
    srs_error_t err = srs_success;
    
    if (!refer) {
        return err;
    }
    
    for (int i = 0; i < (int)refer->args.size(); i++) {
        if ((err = check_single_refer(page_url, refer->args.at(i))) == srs_success) {
            return srs_success;
        }
        
        srs_error_reset(err);
    }
    
    return srs_error_new(ERROR_RTMP_ACCESS_DENIED, "access denied");
}

srs_error_t SrsRefer::check_single_refer(std::string page_url, std::string refer)
{
    srs_error_t err = srs_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) {
        return srs_error_new(ERROR_RTMP_ACCESS_DENIED, "access denied");
    }
    // match primary domain.
    if (pos != domain_name.length() - refer.length()) {
        return srs_error_new(ERROR_RTMP_ACCESS_DENIED, "access denied");
    }
    
    return err;
}