FindQueryFromURI

    std::string md5value = ctx.FindQueryFromURI(uri1,"MD5");
    std::string filenamevalue = ctx.FindQueryFromURI(uri1,"SourceFileName");
    log_info("lyd FileHandler22222222222 1111111111111111\r\n");
    log_info("lyd FileHandler md5value %s\r\n",md5value.c_str());
    log_info("lyd FileHandler filenamevalue %s\r\n",filenamevalue.c_str());