How to enable wire logging for a java HttpURLConnection traffic?

by

According to Sun’s HttpURLConnection source there is some logging support via JUL.

Setup (adjust path as required):

-Djava.util.logging.config.file=/full/path/to/logging.properties

logging.properties:

handlers= java.util.logging.ConsoleHandler
java.util.logging.ConsoleHandler.level = FINEST
sun.net.www.protocol.http.HttpURLConnection.level=ALL

This will log to the console, adjust as required to e.g. log to a file.

Example output:

2010-08-07 00:00:31 sun.net.www.protocol.http.HttpURLConnection writeRequests
FIN: sun.net.www.MessageHeader@16caf435 pairs: {GET /howto.html HTTP/1.1: null}{User-Agent: Java/1.6.0_20}{Host: www.rgagnon.com}{Accept: text/html, image/gif, image/jpeg, *; q=.2, */*; q=.2}{Connection: keep-alive}
2010-08-07 00:00:31 sun.net.www.protocol.http.HttpURLConnection getInputStream
FIN: sun.net.www.MessageHeader@5ac0728 pairs: {null: HTTP/1.1 200 OK}{Date: Sat, 07 Aug 2010 04:00:33 GMT}{Server: Apache}{Accept-Ranges: bytes}{Content-Length: 17912}{Keep-Alive: timeout=5, max=64}{Connection: Keep-Alive}{Content-Type: text/html}

Note that this prints only headers without body.

See http://www.rgagnon.com/javadetails/java-debug-HttpURLConnection-problem.html for details.

There is also system property -Djavax.net.debug=all. But it’s mainly useful for SSL debugging.

More Related Contents:

  1. How to use java.net.URLConnection to fire and handle HTTP requests
  2. Java – sending HTTP parameters via POST method easily
  3. How do I do a HTTP GET in Java? [duplicate]
  4. How to get response body using HttpURLConnection, when code other than 2xx is returned?
  5. How to Reuse HttpUrlConnection? [duplicate]
  6. Read error response body in Java
  7. How to modify the header of a HttpUrlConnection
  8. Can I override the Host header where using java’s HttpUrlConnection class?
  9. Android’s HttpURLConnection throws EOFException on HEAD requests
  10. “PKIX path building failed” and “unable to find valid certification path to requested target”
  11. Connecting to remote URL which requires authentication using Java
  12. Spring RestTemplate – how to enable full debugging/logging of requests/responses?
  13. How can I log SQL statements in Spring Boot?
  14. Authenticated HTTP proxy with Java
  15. Sending a JSON HTTP POST request from Android
  16. Selenium many Logs (How to remove)
  17. In log4j, does checking isDebugEnabled before logging improve performance?
  18. Getting java.net.SocketTimeoutException: Connection timed out in android
  19. Java HTTP Client Request with defined timeout
  20. Good examples using java.util.logging [closed]
  21. Do not use System.out.println in server side code
  22. How can I read an HttpServletReponses output stream?
  23. How to send a stacktrace to log4j?
  24. Where is the “server log” for Tomcat when running externally from IntelliJ Ultimate?
  25. Print full call stack on printStackTrace()?
  26. How to get host name with port from a http or https request
  27. How to send Request payload to REST API in java?
  28. How to exclude a single Class from a Log4j Logger / Appender?
  29. Asynchronous HTTP Client for Java
  30. java.util.logging.Logger doesn’t respect java.util.logging.Level?

Leave a Comment