如何通过互联网制作聊天应用 [英] How do I make a chat app over internet

问题描述

我在两个应用程序（使用c ++ builder）之间存在连接问题，这些应用程序在本地网络中运行良好，但在Internet上无法正常工作，因为客户端和服务器都在不同的路由器中，每个人都有一个内部&外部知识产权，我想你了解我。



所以，我在论坛搜索，我找到了两个解决方案：

1 - NAT：我想你知道，它没有帮助我，我遇到了两个问题：

N°1：就是你在网吧里吃午餐时，例如，你无法访问调制解调器以设置NAT。

N°2：我不确定，但我读到如果客户端和服务器都使用的话它不起作用NAT。

2 - 一个网络服务器，谁在两个应用程序之间建立关系，没有NAT设置。:-(但它需要一个网站，我有尝试使用 http://WWW.Hostinger.com 上的免费网站，我写了一个PHP代码，但没有结果，我失败。



任何人都可以帮助我，告诉我失败的地方，或者给我另一个解决方案。

& thanks。

解决方案

看起来你已经理解了p roblem很好。你正在使用上面的第2步 - 这对于TCP来说基本上是STUN。我强烈建议使用UDP over TCP进行聊天服务。



阅读UDP打孔和STUN。



http://en.wikipedia.org/wiki/UDP_hole_punching [ ^ ]



http://en.wikipedia.org/wiki/STUN [ ^ ]

谢谢 bling ，但是这种方法，没有路由器配置就可以了？

mmm，你能给我一个更好理解的源代码吗？ ;）

I have a problem of connection between two application ( with c++ builder ), the apps are working good in a local network, but aren't work in the internet, `cause both of the client and the server are in deferent routers, and each one have an internal & external IP, I think u understood me.

So, I searched in forums and I found two solution:
1 - NAT: I think you know it, it didn't help me, I got two problems:
N°1: is when you lunch your app in a cyber cafe for example, you can`t access to the modem to setup the NAT.
N°2: i`m not sure but I read that it doesn't work if the both of the client and the server are using the NAT.
2 - A web server, that who makes the relation between the two apps, without a NAT setup.:-( but it need a web site, I have try it with a free web site from http://WWW.Hostinger.com , and i wrote a php code, but without result, I failed.

Can any one help me please, show me where I failed, or give me an other solution.
& thanks.

解决方案

It looks like you already understand the problem quite well. You're on the right track with your step 2 above - which is basically STUN for TCP. I strongly suggest using UDP over TCP for a chat service.

Read up on UDP Hole Punching and STUN.

http://en.wikipedia.org/wiki/UDP_hole_punching[^]

http://en.wikipedia.org/wiki/STUN[^]

Thanks bling, but this method, is it work without router configuration?
mmm, can u give me a source code for Better understanding. ;)

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