Visual C，WinSock HTTP Req和非Windows

Question

I just have a simple question. I am a student and I am learning. I am not very proficient at C++, but I finally set up a working http reqest app in c++ using winsock and I just wanted to know that after compiling will the http request still be sent from other OSes that don't have WinSock?

Answer 1

WinSock, or at least the parts you probably will have been using for introductory networking stuff, is based off of, and largely compatible with, the BSD socket API, which is available on all current operating systems. If you don't have experience with cross-platform development it's unlikely that your code would compile the first time through on a Linux system, but the underlying techniques would be the same.

For cross-platform networking, you might want to consider something like Qt, which provides an API which will work mostly the same on all OSes without much per-platform stuff. Its networking API is also based off Berkeley sockets.

In general, though, there's just no way of checking that your code works cross-platform without testing it cross-platform. Grab a Linux distribution and try it out; note that some are specifically intended to work from your Windows disk without the need to repartition.

Answer 2

If you use standardized BSD-based socket functions, then your code will typically work on multiple platforms socket() , bind() , connect() , send() , recv() , etc. Caveats include:

1. error codes. When a WinSock/BSD function fails on Windows, the error code is retreived using WSAGetLastError() , whereas other platforms use errno instead. So you will have to wrap that portion if you are trying to write cross-platform code.

2. get/setsockopt() may implement different options on different platforms, not all options are standardized across all platforms.

If you use WinSock-specific functions, then your code will only work on Windows. WSASocket() , WSAConnect/Ex() , WSASend/Ex() , WSARecv/Ex() , etc.

All versions of Windows have WinSock. Most platforms, including Windows, support a BSD-based socket API.

After you compile your code, it will only run on the specific platform it was compiled for. You would have to compile the code separately for each platform you want to support.