hostname

问题 So would username@gtld be a valid email? As a practical example google is purchasing the gTLD "gmail". Obviously they can associate A records with that permitting you to just type http://gmail/ to access the site. But, are there any specs that prohibit them from associating MX records with that as well, allowing folks to give out an alternative address username@gmail? I ask because I want to make sure our email validator is future proof and technically correct. 回答1: I think I answered my own

问题 So would username@gtld be a valid email? As a practical example google is purchasing the gTLD "gmail". Obviously they can associate A records with that permitting you to just type http://gmail/ to access the site. But, are there any specs that prohibit them from associating MX records with that as well, allowing folks to give out an alternative address username@gmail? I ask because I want to make sure our email validator is future proof and technically correct. 回答1: I think I answered my own

问题 \h is a bash prompt escape sequence that expands to the hostname. Where does it get the hostname from? On my system it shows a value that I cannot find anywhere, not in hostname -f or /etc/hosts or /etc/hostname or /etc/sysconfig/network or $HOSTNAME . So I'm wondering where it's getting it from. My system is Centos 7.4. I know there are hidden places where things such as UUIDs are stored, and I seem to recall that I've come across a similar hidden hostname type of issue in the past, but I

问题 I am testing this winhttp example from http://msdn.microsoft.com/en-us/library/aa384270%28v=vs.85%29.aspx DWORD dwSize = 0; DWORD dwDownloaded = 0; LPSTR pszOutBuffer; BOOL bResults = FALSE; HINTERNET hSession = NULL, hConnect = NULL, hRequest = NULL; // Use WinHttpOpen to obtain a session handle. hSession = WinHttpOpen( L"WinHTTP Example/1.0", WINHTTP_ACCESS_TYPE_DEFAULT_PROXY, WINHTTP_NO_PROXY_NAME, WINHTTP_NO_PROXY_BYPASS, 0 ); // Specify an HTTP server. if( hSession ) hConnect =

问题 I'm developing a CodeIgniter app on Win 7, using WampServer v2.0 - I've edited my local HOSTS file so that I can access it here: ht_tp://testdomain/ instead of ht_tp://localhost/testdomain/ to help make it work the same locally as it does when deployed live, with a line like this: 127.0.0.1 testdomain This set up is working fine when I access the pages in browser on the same PC. Now I'm developing some new pages for mobile use, e.g. iPhone, and I want to be able to view my site directly on

问题 I need to match a host name--but don't want the tld: example.com =~ /regex/ => example sub.example.com =~ /regex/ => sub.example sub.sub.example.com =~ /regex/ => sub.sub.example Any help with the regex? Thanks. 回答1: Assuming your string is correctly formatted and doesn't include things like protocol [i.e. http://], you need all characters up to but not including the final .tld. So this is the simplest way to do this. The trick with regular expressions is not to overcomplicate things: .*(?=\.

问题 Anyone have a good (preferably tested) regex for accpeting only a valid DNS hostname, IPv4 or IPv6 address? 回答1: I understand that you may be forced to use a regex. However, if possible it is better to avoid using regexes for this task and use a Java library class to do the validation instead. If you want to do validation and DNS lookup together, then InetAddress.getByName(String) is a good choice. This will cope with DNS, IPv4 and IPv6 in one go, and it returns you a neatly wrapped

问题 I need to resolve hostname defined in hosts file to its corresponding IP address. For example my host file look like this - "/etc/hosts" 127.0.0.1 ggns2dss81 localhost.localdomain localhost ::1 localhost6.localdomain6 localhost6 192.168.253.8 abcdserver 192.168.253.20 testwsserver Now in my node.js , i can read content of this file, but i need to fetch for given hostname . hostname = "testwsserver" hostIP = getIP(hostname); console.log(hostIP); // This should print 192.168.253.20 PS - npm pkg

问题 I need a simple function that outputs a char* hostname , given a char* IPAddress . Any ideas or hints? Also, is easiest way to get the IP address from a hostname is gethostbyname() and inet_ntoa() is that correct? 回答1: Use gethostbyaddr() or getnameinfo() to convert an IP into a hostname. Use gethostbyname() or getaddrinfo() to convert a hostname into an IP. gethostby...() only support IPv4. get...info() support multiple protocols including both IPv4 and IPv6, and are the preferred functions

问题 I am currently implementing openssl into my application. My problem arose when I had to set the hostname, IP - address, and port of the BIO. I have always known ip and hostname to be the same thing. Could someone please explain the difference. 回答1: A host name is a combination of the name of your machine and a domain name (e.g. machinename.domain.com). The purpose of a host name is readability - it's much easier to remember than an IP address. All hostnames resolve to IP addresses, so in many