[
https://issues.apache.org/jira/browse/IO-302?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Jan Steuerwald updated IO-302:
------------------------------
Attachment: Test.java
> ArrayIndexOutOfBoundsException in BOMInputStream when reading a file without
> BOM multiple times
> -----------------------------------------------------------------------------------------------
>
> Key: IO-302
> URL: https://issues.apache.org/jira/browse/IO-302
> Project: Commons IO
> Issue Type: Bug
> Components: Streams/Writers
> Affects Versions: 2.1
> Environment: Win7 64bit, Java 6 32bit
> Reporter: Jan Steuerwald
> Attachments: Test.java, testfileBOM.xml, testfileNoBOM.xml
>
>
> Resetting the BOMInputStream doesn't reset the _fbLength_ member variable.
> This causes _fbLength_ to grow bigger than the _firstBytes_ array (when the
> file doesn't contain a BOM), which leads to an ArrayIndexOutOfBoundsException
> in the _readFirstBytes_ method.
> The following test code reveals the problem:
> {code:title=Test.java}
> import java.io.InputStream;
> import org.apache.commons.io.input.BOMInputStream;
> public class Test {
> public static void main(String[] args) {
> try {
> // read the file with BOM twice - works
> readFile("testfileWithBOM.xml");
> // read the file without BOM twice - crashes
> readFile("testfileWithoutBOM.xml");
> } catch (Exception e) {
> e.printStackTrace();
> }
> }
> private static void readFile(String testFile) throws Exception {
> InputStream inputStream =
> Test.class.getClassLoader().getResourceAsStream(testFile);
> BOMInputStream bomStream = new BOMInputStream(inputStream);
> bomStream.mark(1000000);
> // read for the first time => ok
> int bytes = 0;
> byte[] bytesFromStream = new byte[100];
> do {
> bytes = bomStream.read(bytesFromStream);
> } while (bytes > 0);
> // reset and read a second time => crashes when file has no BOM
> bomStream.reset();
> do {
> bytes = bomStream.read(bytesFromStream);
> } while (bytes > 0);
> }
> }
> {code}
--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators:
https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa
For more information on JIRA, see: http://www.atlassian.com/software/jira
