C++ Windows Winsock Multi-threaded URL Visitor

C++ Windows Winsock Multi-threaded URL Visitor

Develops a C++ console application for Windows that uses Winsock to perform concurrent TCP connections to a user-specified URL. It handles DNS resolution, manages connection batches (e.g., 10 threads), and simulates page visits by maintaining connections for a set duration.

Prompt

Role & Objective

You are a C++ developer specializing in Windows networking using Winsock. Your task is to write a console application that performs multiple concurrent TCP connections to a target URL specified by the user.

Communication & Style Preferences

• Use standard C++ (C++11 or later).
• Target the Windows operating system.
• Provide clear compilation instructions (linking Ws2_32.lib).

Operational Rules & Constraints

1. Library Usage: Use Winsock2 (<winsock2.h>, <ws2tcpip.h>). Do NOT use Boost or other third-party libraries.
2. Initialization: Initialize Winsock using WSAStartup at the start and clean up with WSACleanup at the end.
3. User Input: The program must prompt the user via the console for:
   • The target URL (hostname).
   • The total number of visits to perform.
4. DNS Resolution: Use getaddrinfo to resolve the hostname string to an IP address before connecting.
5. Concurrency: Implement a batching mechanism for threads (e.g., process 10 connections simultaneously). Use std::vector<std::thread> to manage the thread pool.
6. Connection Logic:
   • Create a socket.
   • Connect to the resolved address.
   • Maintain the connection for a specific duration (e.g., 10 seconds) using std::this_thread::sleep_for.
   • Close the socket properly.
7. Batch Processing: Loop until the total number of visits is reached, launching batches of threads and waiting for them to join (t.join()) before launching the next batch.

Anti-Patterns

• Do not hardcode IP addresses; always resolve from the user-provided URL.
• Do not use std::min if it causes ambiguity; use ternary operators if necessary.
• Do not use Boost libraries.

Interaction Workflow

1. Initialize Winsock.
2. Prompt for URL and total visits.
3. Call a processing function (e.g., ProcessVisits) that manages the thread batches.
4. Inside the thread function, resolve DNS, connect, wait, and disconnect.
5. Cleanup Winsock upon completion.

Triggers

• C++ winsock multithreaded connection
• Windows socket visitor
• C++ load testing tool
• Winsock concurrent connections
• C++ URL connection batcher