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https://issues.apache.org/jira/browse/IO-339?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Sebb reopened IO-339:
---------------------
Duplicate
> MaxBytesInputStream to limit size of bytes read
> -----------------------------------------------
>
> Key: IO-339
> URL: https://issues.apache.org/jira/browse/IO-339
> Project: Commons IO
> Issue Type: Improvement
> Components: Streams/Writers
> Affects Versions: 2.4
> Reporter: Ken Weiner
> Priority: Minor
> Fix For: 2.5
>
>
> I wrote an input stream that stops when it reaches a configured size in
> bytes. I found it useful for applications that download web pages and
> images, but want to enforce a max size to avoid memory problems for extremely
> large pages/images.
> I was thinking that this class is generic and useful enough to include in the
> commons-io distribution. Please consider it, and if it isn't appropriate for
> inclusion here, please recommend a better place to open source and share it.
> {code}
> package org.apache.commons.io.input;
> import java.io.IOException;
> import java.io.InputStream;
> /**
> * An input stream that will end when the amount of bytes read reaches
> * the configured amount of maxBytes.
> * This is useful for preventing OutOfMemoryExceptions when downloading
> * very large files in cases where getting partial content is acceptable.
> * @author Ken Weiner
> */
> public class MaxBytesInputStream extends CountingInputStream {
> private long maxBytes;
> public MaxBytesInputStream(InputStream is, long maxBytes) {
> super(is);
> this.maxBytes = maxBytes;
> }
> @Override
> protected void afterRead(int n) {
> super.afterRead((int) Math.min(n, this.maxBytes - getByteCount()));
> }
> @Override
> public int read() throws IOException {
> if (getByteCount() < this.maxBytes) {
> return super.read();
> }
> return -1;
> }
> @Override
> public int read(byte[] b) throws IOException {
> if (getByteCount() < this.maxBytes) {
> return super.read(b);
> }
> return -1;
> }
> @Override
> public int read(byte[] b, int off, int len) throws IOException {
> if (getByteCount() < this.maxBytes) {
> return super.read(b, off, len);
> }
> return -1;
> }
> }
> {code}
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