java - ArrayIndexOutOfBoundsException : 4096 while reading gif file

Question

我能够读取 png 文件。但是在读取 gif 文件时出现 ArrayIndexOutOfBoundsException: 4096。

byte[] fileData = imageFile.getFileData();
ByteArrayInputStream byteArrayInputStream = new ByteArrayInputStream(fileData);
RenderedImage image = ImageIO.read(byteArrayInputStream)

抛出的异常看起来像

java.lang.ArrayIndexOutOfBoundsException: 4096
    at com.sun.imageio.plugins.gif.GIFImageReader.read(Unknown Source)
    at javax.imageio.ImageIO.read(Unknown Source)
    at javax.imageio.ImageIO.read(Unknown Source)

可能是什么问题，解决方案是什么？

Answer 1

更新 3:解决方案

我最终开发了自己的 GifDecoder，并根据 Apache License 2.0 将其作为开源软件发布。你可以从这里得到它:https://github.com/DhyanB/Open-Imaging .它不会遇到 ArrayIndexOutOfBoundsException 问题并提供不错的性能。

非常感谢任何反馈。特别是，我想知道它是否适用于您的所有图像，以及您是否对它的速度感到满意。

希望对您有所帮助(:

初步回答

也许这个错误报告与相同的问题相关或描述了相同的问题:https://bugs.openjdk.java.net/browse/JDK-7132728 .

引用:

FULL PRODUCT VERSION :
java version "1.7.0_02"
Java(TM) SE Runtime Environment (build 1.7.0_02-b13)
Java HotSpot(TM) 64-Bit Server VM (build 22.0-b10, mixed mode)

ADDITIONAL OS VERSION INFORMATION :
Microsoft Windows [Version 6.1.7601]

A DESCRIPTION OF THE PROBLEM :
according to specification
http://www.w3.org/Graphics/GIF/spec-gif89a.txt
> There is not a requirement to send a clear code when the string table is full.

However, GIFImageReader requires the clear code when the string table is full.
GIFImageReader violates the specification, clearly.
In the real world, sometimes people finds such high compressed gif image.
so you should fix this bug.

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
javac -cp .;PATH_TO_COMMONS_CODEC GIF_OverflowStringList_Test.java
java -cp .;PATH_TO_COMMONS_CODEC GIF_OverflowStringList_Test

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
complete normally. no output
ACTUAL -
ArrayIndexOutOfBounds occurs.

ERROR MESSAGES/STACK TRACES THAT OCCUR :
Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 4096
        at com.sun.imageio.plugins.gif.GIFImageReader.read(GIFImageReader.java:1
075)
        at javax.imageio.ImageIO.read(ImageIO.java:1400)
        at javax.imageio.ImageIO.read(ImageIO.java:1322)
        at GIF_OverflowStringList_Test.main(GIF_OverflowStringList_Test.java:8)


REPRODUCIBILITY :
This bug can be reproduced always.

错误报告还提供了重现错误的代码。

更新 1

这是一张导致我自己的代码出现错误的图片:

更新 2

我尝试使用 Apache Commons Imaging 读取相同的图像，这导致了以下异常:

java.io.IOException: AddStringToTable: codes: 4096 code_size: 12
    at org.apache.commons.imaging.common.mylzw.MyLzwDecompressor.addStringToTable(MyLzwDecompressor.java:112)
    at org.apache.commons.imaging.common.mylzw.MyLzwDecompressor.decompress(MyLzwDecompressor.java:168)
    at org.apache.commons.imaging.formats.gif.GifImageParser.readImageDescriptor(GifImageParser.java:388)
    at org.apache.commons.imaging.formats.gif.GifImageParser.readBlocks(GifImageParser.java:251)
    at org.apache.commons.imaging.formats.gif.GifImageParser.readFile(GifImageParser.java:455)
    at org.apache.commons.imaging.formats.gif.GifImageParser.readFile(GifImageParser.java:435)
    at org.apache.commons.imaging.formats.gif.GifImageParser.getBufferedImage(GifImageParser.java:646)
    at org.apache.commons.imaging.Imaging.getBufferedImage(Imaging.java:1378)
    at org.apache.commons.imaging.Imaging.getBufferedImage(Imaging.java:1292)

这看起来与我们在 ImageIO 中遇到的问题非常相似，所以我在 Apache Commons JIRA 上报告了这个错误:https://issues.apache.org/jira/browse/IMAGING-130 .