前几日在更新自己的开源游戏引擎 EtherEngine 时编写了使用 C++ 对 HTTP/HTTPS 链接进行分割的算法，分享一下：
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| ETHER_API splitLink(lua_State* L)
{
string link = luaL_checkstring(L, 1), domain, route, param;
if (!link.empty())
{
link.erase(0, link.find_first_not_of(" "));
link.erase(link.find_last_not_of(" ") + 1);
}
domain = link.substr(0, 5) == "http:" || link.substr(0, 6) == "https:" ?
link.substr(0, link.find_first_of("/", link.find_first_of("/") + 3))
: link.find_first_of("/") == string::npos ? link : link.substr(0, link.find_first_of("/"));
size_t index_quemark = link.find_first_of("?");
index_quemark == string::npos ?
(param = "", route = domain.size() == link.size() ? "/" : link.substr(domain.size()))
: (param = link.substr(index_quemark + 1), route = link.substr(domain.size(), index_quemark - domain.size()));
lua_pushstring(L, domain.c_str());
lua_pushstring(L, route.c_str());
lua_pushstring(L, param.c_str());
return 3;
}
|
由于上述代码是与 Lua 语言进行交互的 API，所以在下面给出通用的函数封装：
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| void splitLink(string link, string& domain, string& route, string& param)
{
if (!link.empty())
{
link.erase(0, link.find_first_not_of(" "));
link.erase(link.find_last_not_of(" ") + 1);
}
domain = link.substr(0, 5) == "http:" || link.substr(0, 6) == "https:" ?
link.substr(0, link.find_first_of("/", link.find_first_of("/") + 3))
: link.find_first_of("/") == string::npos ? link : link.substr(0, link.find_first_of("/"));
size_t index_quemark = link.find_first_of("?");
index_quemark == string::npos ?
(param = "", route = domain.size() == link.size() ? "/" : link.substr(domain.size()))
: (param = link.substr(index_quemark + 1), route = link.substr(domain.size(), index_quemark - domain.size()));
}
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欢迎大家关注我的开源游戏引擎：https://github.com/VoidmatrixHeathcliff/EtherEngine
