Get name resolution time on HTTP request

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Long live,

Is it possible to obtain separate name resolution time from access time? The code I have is:

HttpURLConnection connection;
try {
    URL endereco = new URL(url);
    connection = (HttpURLConnection) endereco.openConnection();
    ...

it is possible to split openConnection in order to take times 1º of the resolution of the name to the DNS server and 2º the access time?

Thank you.

java android http http-request dns

1 answer

3


You can use the InetAddress to make the name resolution before making the connection.

InetAddress inetAddress = InetAddress.getByName("pt.stackoverflow.com");

From this, you can connect to the address IP which has been solved, use the method getHostAddress to obtain the IP:

URL endereco = new URL("http", inetAddress.getHostAddress(), "/");

Note that when creating the URL I didn’t use the same constructor as your example, because only the IP does not provide all the information necessary to make the connection, so use a builder that meets the need.

  • 1

    +1 - perfect, if parsing well the name resolution is not part of HTTP itself

  • Thank you, another question, when connect, it tb will not make the name resolution incorporated? Making with this solution the resolution 2x?

  • 1

    Not in this case, because the inetAddress.getHostAddress() will return the host IP, and there will be no need for another name resolution.

  • my question was and when I asked: connection = (HttpURLConnection) endereco.openConnection();
 ...
 BufferedInputStream inputStream = new BufferedInputStream(connection.getInputStream()); I won’t be redoing the name resolution when connecting?

  • It will not, because you are using the IP to make the connection.

  • Thank you Henrique, reply accepted ;)

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