Package net.i2p.util

Class DNSOverHTTPS

java.lang.Object
net.i2p.util.DNSOverHTTPS
All Implemented Interfaces:
EepGet.StatusListener
public class DNSOverHTTPS extends Object implements EepGet.StatusListener
Simple implemetation of DNS over HTTPS. Also sets the local clock from the received date header. Warning - not thread-safe. Create new instances as necessary. As of 0.9.49, this supports the RFC 8484 (DNS) format only. Does NOT support the JSON format (used prior to 0.9.49) or RFC 7858 (DNS over TLS). https://developers.google.com/speed/public-dns/docs/dns-over-https https://developers.cloudflare.com/1.1.1.1/dns-over-https/json-format/ https://github.com/curl/curl/wiki/DNS-over-HTTPS
Since:
0.9.35

  • Field Details

    • UA_CLEARNET

      public static final String UA_CLEARNET
      ESR version of Firefox, same as Tor Browser
      Since:
      public since 0.9.54 for i2ptunnel
      See Also:

  • Constructor Details

  • Method Details

    • lookup

      public String lookup(String host)
      V4_ONLY unless we have only IPv6 address, then V6_ONLY
      Returns:
      null if not found

    • lookup

      public String lookup(String host, DNSOverHTTPS.Type type)
      Lookup in cache, then query servers
      Returns:
      null if not found

    • clearCaches

      public static void clearCaches()

    • attemptFailed

      public void attemptFailed(String url, long bytesTransferred, long bytesRemaining, int currentAttempt, int numRetries, Exception cause)
      Specified by:
      attemptFailed in interface EepGet.StatusListener
      See Also:

    • bytesTransferred

      public void bytesTransferred(long alreadyTransferred, int currentWrite, long bytesTransferred, long bytesRemaining, String url)
      Description copied from interface: EepGet.StatusListener
      Total length should be == alreadyTransferred + currentWrite + bytesRemaining for all calls
      Specified by:
      bytesTransferred in interface EepGet.StatusListener
      Parameters:
      alreadyTransferred - total of all attempts, not including currentWrite If nonzero on the first call, a partial file of that length was found, _and_ the server supports resume. If zero on a subsequent call after some bytes are transferred (and presumably after an attemptFailed), the server does _not_ support resume and we had to start over. To track _actual_ transfer if the output file could already exist, the listener should keep its own counter, or subtract the initial alreadyTransferred value. And watch out for alreadyTransferred resetting if a resume failed...
      currentWrite - since last call to the listener
      bytesTransferred - includes headers, retries, redirects, discarded partial downloads, ...
      bytesRemaining - on this attempt only, currentWrite already subtracted - or -1 if chunked encoding or server does not return a length

    • transferComplete

      public void transferComplete(long alreadyTransferred, long bytesTransferred, long bytesRemaining, String url, String outputFile, boolean notModified)
      Specified by:
      transferComplete in interface EepGet.StatusListener
      Parameters:
      outputFile - null if unknown (output stream constructor)
      See Also:

    • transferFailed

      public void transferFailed(String url, long bytesTransferred, long bytesRemaining, int currentAttempt)
      Specified by:
      transferFailed in interface EepGet.StatusListener
      See Also:

    • attempting

      public void attempting(String url)
      Specified by:
      attempting in interface EepGet.StatusListener

    • headerReceived

      public void headerReceived(String url, int attemptNum, String key, String val)
      Use the Date header as a backup time source. Code from Reseeder. We set the stratum to a lower (better) value than in Reseeder, as Cloudflare and Google probably have a better idea than our reseeds.
      Specified by:
      headerReceived in interface EepGet.StatusListener

    • main

      public static void main(String[] args)