Simple proxy tester with multi-threading support using bash and curl

proxy_tester.sh

#!/bin/bash
#
# Simple proxy tester with multi-threading support.
# Tests socks4, socks5, and http proxies.
#
# Usage: ./proxy_tester.sh [protocol] [proxy_list] [nthread] [url] [timeout]
# Example: ./proxy_tester.sh http proxies.txt 10 https://www.google.com/ 5


# Set default values for test URL and timeout
TEST_URL="https://www.strava.com/"
TIMEOUT=5

# Function to test a single proxy
function test_proxy() {
    local proxy=$1
    local protocol=$2
    local timeout=$3

    # Test the proxy by sending a request to the test URL
    local response=$(curl -s -w '%{http_code},%{time_total}' -o /dev/null -x $protocol://$proxy --connect-timeout $timeout ${TEST_URL})

    # Extract the HTTP code and response time from the response
    HTTP_CODE=$(echo $response | cut -d',' -f1)
    TIME=$(echo $response | cut -d',' -f2)

    # Print a message if the proxy is working
    if [[ $HTTP_CODE == 200 ]]; then
        echo "Proxy $proxy is working. Response time: $TIME seconds."
    fi
}

# Function to display usage information
function usage() {
    echo "Usage: $0 [protocol] [proxy_file] [num_threads] [test_url] [timeout]"
    echo "Example: $0 http proxies.txt 10 https://www.google.com/ 10"
}

# Check if all arguments are provided
if [[ $# -lt 3 ]]; then
    usage
    exit 1
fi

# Assign arguments to variables
protocol=$1
proxy_file=$2
num_threads=$3

# Validate protocol
if [[ $protocol != http && $protocol != socks4 && $protocol != socks5 ]]; then
    echo "Invalid protocol. Only http, socks4, and socks5 protocols are supported."
    exit 1
fi

# Check if test URL and timeout are provided
if [[ $# -ge 4 ]]; then
    TEST_URL=$4
fi

if [[ $# -ge 5 ]]; then
    TIMEOUT=$5
fi

# Read proxy file and test each proxy
count=0
while IFS= read -r proxy; do
    test_proxy "$proxy" "$protocol" ${TIMEOUT} &
    ((count++))
    if [[ $count -eq num_threads ]]; then
        wait
        count=0
    fi

done < "$proxy_file"

wait
exit 0