java io IOException Server returned HTTP response code 500

Question

I m facing this problem with Java  I want to get some HTML informations from a URL  This code was working for so long  but suddenly  it stopped working   When I access this URL using the browser  it opens with no problem   The code   URL site   new URL this url   java net URLConnection yc   site openConnection    BufferedReader in   new BufferedReader new InputStreamReader yc getInputStream      String inputLine  String objetivo     lt td height   28   colspan   2     while   inputLine   in readLine       null  amp  amp   inputLine contains objetivo       inputLine   in readLine      The Exception   java io IOException  Server returned HTTP response code  500 for URL  http   www myurl com     at sun net www protocol http HttpURLConnection getInputStream Unknown Source      at Sites websites Site1 getData Site1 java 53      at util Util lerArquivo Util java 278      at util Util main Util java 983    What s wrong  Did the host block me

User · Accepted Answer

HTTP status code 500 usually means that the webserver code has crashed. You need to determine the status code beforehand using HttpURLConnection#getResponseCode() and in case of errors, read the HttpURLConnection#getErrorStream() instead. It may namely contain information about the problem.

If the host has blocked you, you would rather have gotten a 4nn status code like 401 or 403.

This Status Code 500 is an Internal Server Error  This code indicates that a part of the server  for example  a CGI program  has crashed or encountered a configuration error   i think the problem does nt lie on your side  but rather on the side of the Http server  the resources you used to access may have been moved or get corrupted  or its configuration just may have altered or spoiled

User · Answer

I have encountered the same problem and found out the solution   You may look within the first server response and see if the server sent you a cookie   To check if the server sent you a cookie  you can use HttpURLConnection getHeaderFields   and look for headers named  Set-Cookie    If existing  here s the solution for your problem  100  Working for this case    1 if it worked for you

User · Answer

I had this problem i e  works fine when pasted into browser but 505s when done through java  It was simply the spaces that needed to be escaped encoded

User · Answer

Change the content-type to  application x-www-form-urlencoded   i solved the problem

User · Answer

The problem must be with the parameters you are passing You must be passing blank parameters   For example   http   www myurl com id 5 amp name  Check if you are handling this at the server you are calling

[java] java.io.IOException: Server returned HTTP response code: 500

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