模拟生成 nginx 日志shell 脚本

generate_nginx_logs.sh

#!/bin/bash

# 生成随机公网IP地址
generate_fake_public_ip() {
    echo "$((RANDOM % 223 + 1)).$((RANDOM % 256)).$((RANDOM % 256)).$((RANDOM % 256))"
}

# 生成随机日期和时间
generate_random_datetime() {
    start_timestamp=$(date -d "2022-01-01" +%s)
    end_timestamp=$(date -d "2022-12-31" +%s)
    random_timestamp=$((start_timestamp + RANDOM % (end_timestamp - start_timestamp)))

    date -d "@$random_timestamp" +"%d/%b/%Y:%H:%M:%S %z"
}

# 生成随机HTTP请求方法
generate_random_http_method() {
    methods=("GET" "POST" "PUT" "DELETE")
    echo ${methods[$((RANDOM % ${#methods[@]}))]}
}

# 生成随机URL路径
generate_random_url_path() {
    paths=("homepage" "about" "products" "services" "contact" "blog" "login" "signup" "dashboard" "profile")
    weights=(20 10 10 10 5 5 3 3 2 2) # 路径对应的权重，数字越大权重越高
    total_weight=0

    for weight in "${weights[@]}"; do
        total_weight=$((total_weight + weight))
    done

    rand=$((RANDOM % total_weight))
    cumulative_weight=0
    index=0

    for i in "${!paths[@]}"; do
        cumulative_weight=$((cumulative_weight + weights[i]))

        if [ $rand -lt $cumulative_weight ]; then
            index=$i
            break
        fi
    done

    echo "${paths[$index]}"
}

# 生成随机HTTP状态码
generate_random_status_code() {
    status_codes=("200" "200" "200" "200" "200" "301" "301" "404" "500")
    echo ${status_codes[$((RANDOM % ${#status_codes[@]}))]}
}

# 生成随机设备类型
generate_random_device_type() {
    device_types=("Desktop" "Desktop" "Desktop" "Mobile" "Mobile" "Tablet" "Smart TV" "Game Console")
    echo ${device_types[$((RANDOM % ${#device_types[@]}))]}
}

# 生成随机用户代理
generate_random_user_agent() {
    device_type=$(generate_random_device_type)

    case $device_type in
        "Desktop")
            user_agents=("Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.182 Safari/537.36" "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:85.0) Gecko/20100101 Firefox/85.0" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.182 Safari/537.36" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Firefox/85.0")
            ;;
        "Mobile")
            user_agents=("Mozilla/5.0 (iPhone; CPU iPhone OS 14_4_2 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/14.0.3 Mobile/15E148 Safari/604.1" "Mozilla/5.0 (Linux; Android 11; SM-G960U) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.181 Mobile Safari/537.36" "Mozilla/5.0 (Linux; Android 11; SM-A515F) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.181 Safari/537.36")
            ;;
        "Tablet")
            user_agents=("Mozilla/5.0 (iPad; CPU OS 14_4_2 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/14.0.3 Mobile/15E148 Safari/604.1" "Mozilla/5.0 (Linux; Android 11; SM-T500) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.181 Safari/537.36" "Mozilla/5.0 (Linux; Android 11; SM-P615) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.181 Safari/537.36")
            ;;
        "Smart TV")
            user_agents=("Mozilla/5.0 (SMART-TV; Linux; Tizen 6.0) AppleWebKit/537.36 (KHTML, like Gecko) SamsungBrowser/13.0 TV Safari/537.36" "Mozilla/5.0 (SMART-TV; Linux; WebKit) AppleWebKit/538.16 (KHTML, like Gecko) PhilipsTV/3.0 TV Safari/538.16" "Mozilla/5.0 (SMART-TV; Linux; Tizen 5.0) AppleWebKit/537.36 (KHTML, like Gecko) SamsungBrowser/12.0 TV Safari/537.36")
            ;;
        "Game Console")
            user_agents=("Mozilla/5.0 (PlayStation 5 8.00) AppleWebKit/605.1.15 (KHTML, like Gecko)" "Mozilla/5.0 (Nintendo Switch; Switch) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/13.0.1 NintendoBrowser/5.1.0.15139")
            ;;
        *)
            user_agents=("Unknown")
            ;;
    esac

    echo ${user_agents[$((RANDOM % ${#user_agents[@]}))]}
}

# 生成随机文件请求大小（字节）
generate_random_file_size() {
    file_sizes=("1024" "1024" "1024" "2048" "2048" "3072" "4096")
    echo ${file_sizes[$((RANDOM % ${#file_sizes[@]}))]}
}

# 生成一行访问日志
generate_log_entry() {
    ip=$(generate_fake_public_ip)
    datetime=$(generate_random_datetime)
    method=$(generate_random_http_method)
    path=$(generate_random_url_path)
    status=$(generate_random_status_code)
    user_agent=$(generate_random_user_agent)
    file_size=$(generate_random_file_size)

    echo "$ip - - [$datetime] \"$method $path HTTP/1.0\" $status $file_size \"$user_agent\""
}

# 从命令行参数获取生成的数量
if [[ $# -eq 1 ]]; then
    num_logs=$1
else
    echo "请提供生成的数量参数"
    exit 1
fi

# 生成访问日志
for ((i=0; i<num_logs; i++)); do
    log_entry=$(generate_log_entry)
    echo $log_entry >> nginx.log
done

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