之前使用boost解析字符串，因为编译跨平台的boost比较麻烦，现在尝试使用C++11，效果一样，以下是一个解析url的简单demo
#include <iostream> #include <regex> int url2domain(const std::string &url, std::string &domain, unsigned &port) { int ret = -1; //使用迭代器拆分字符串 http://www.cppprog.com/2009/0112/48.html std::regex reg_domain_port("/"); //按/符拆分字符串 std::cregex_token_iterator itrBegin(url.c_str(), url.c_str() + url.size(), reg_domain_port, -1); std::cregex_token_iterator itrEnd; int i = 0; std::string domain_port; for (std::cregex_token_iterator itr = itrBegin; itr != itrEnd; ++itr) { i++; if (i == 3) { domain_port = *itr; } } if (domain_port.size() == 0) { domain_port = url; } //考虑带端口的情况 std::regex reg_port(":"); std::cregex_token_iterator itrBegin2(domain_port.c_str(), domain_port.c_str() + domain_port.size(), reg_port, -1); std::cregex_token_iterator itrEnd2; int j = 0; for (std::cregex_token_iterator itr = itrBegin2; itr != itrEnd2; ++itr){ j++; if (j == 1){ domain = *itr; } if (j == 2) { port = std::stold(*itr); //itoa(port,*itr,5);; } } if (domain.size() == 0) { domain = domain_port; } return ret; } std::string urls[] = { "hrbcyyzy-video.guisen.com.cn", "hrbcyyzy-video.guisen.com.cn:80", "http:://hrbcyyzy-video.guisen.com.cn", "http:://hrbcyyzy-video.guisen.com.cn:80", "http:://hrbcyyzy-video.guisen.com.cn/222", "http:://hrbcyyzy-video.guisen.com.cn:80/222" }; int main() { int ret = -1; std::string domain; unsigned int port = 0; for (int i = 0; i < 6; i++) { url2domain(urls[i], domain, port); } return 0; }
