use*_*960 5 c c++ regex mfc visual-c++
我想在c ++ {MFC}中构建一个正则表达式来验证URL.
正则表达式必须满足以下条件.
有效网址: - http://cu-241.dell-tech.co.in/MyWebSite/ISAPIWEBSITE/Denypage.aspx/ http://www.google.com http://www.google.co.in
无效的网址:-
http://cu-241.dell-tech.co.in/\MyWebSite /\ISAPIWEBSITE /\Denypage.aspx/= Regx必须检查&无效网址为"/\MyWebSite /\ISAPIWEBSITE /\Denypage"之间的'\'字符的.aspx /"
http://cu-241.dell-tech.co.in//////MyWebSite/ISAPIWEBSITE/Denypage.aspx/ =由于多次输入"///////",Regx必须检查并使URL无效在网址中.
http://news.google.co.in/%5Cnwshp?hl=en&tab=wn =正则表达式必须检查并使URL无效,以便额外插入%5C和%2F字符.
我们如何开发满足上述条件的通用正则表达式.请通过提供一个正则表达式帮助我们,这个表达式将处理CPP中的上述场景{MFC}
Cir*_*sta 10
您是否尝试过使用RFC 3986建议?如果您能够使用GCC-4.9,那么您可以直接使用<regex>
.
它表明^(([^:/?#]+):)?(//([^/?#]*))?([^?#]*)(\?([^#]*))?(#(.*))?
你可以获得子匹配:
scheme = $2
authority = $4
path = $5
query = $7
fragment = $9
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例如:
int main(int argc, char *argv[])
{
std::string url (argv[1]);
unsigned counter = 0;
std::regex url_regex (
R"(^(([^:\/?#]+):)?(//([^\/?#]*))?([^?#]*)(\?([^#]*))?(#(.*))?)",
std::regex::extended
);
std::smatch url_match_result;
std::cout << "Checking: " << url << std::endl;
if (std::regex_match(url, url_match_result, url_regex)) {
for (const auto& res : url_match_result) {
std::cout << counter++ << ": " << res << std::endl;
}
} else {
std::cerr << "Malformed url." << std::endl;
}
return EXIT_SUCCESS;
}
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然后:
./url-matcher http://localhost.com/path\?hue\=br\#cool
Checking: http://localhost.com/path?hue=br#cool
0: http://localhost.com/path?hue=br#cool
1: http:
2: http
3: //localhost.com
4: localhost.com
5: /path
6: ?hue=br
7: hue=br
8: #cool
9: cool
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