failed to unzip uploaded file with ZipInputStream

[Michael An]

Hi,

I'm using Appache FileUpload lib to upload zip file and then unzip it and read the content of files in it on server side. I didn't get through it. I tried unzipping the same zip file with Java application program successfully. On server program, the entry name returned for a file entry is not purely file name, it contains kind of compressed content something like following

6
 > file_name.extensionU�=�0��
��é������.�M49!��c��{����<�>��%Ẏ#pIX~A���D�I

Once I tried to thereafter read content from the entry, i got exception 'java.util.zip.ZipException: invalid code lengths set'. Please note the same zip file works fine with Java application program. Following are two code blocks for processing the zip file with ZipInputStream.

Code in Java application program

public class Unzip {
	public static void main(String[] args) {
		String zipname = "my_zip_file.zip";
		try {
			FileInputStream fis = new FileInputStream(zipname);
			ZipInputStream zis = new ZipInputStream(
					new BufferedInputStream(fis));
			ZipEntry entry;

			while ((entry = zis.getNextEntry()) != null) {
				System.out.println("Unzipping: " + entry.getName());
				int size;
				byte[] buffer = new byte[2048];
				ByteArrayOutputStream bos = new ByteArrayOutputStream();
				while ((size = zis.read(buffer, 0, buffer.length)) != -1) {
					bos.write(buffer, 0, size);
				}
				System.out.println("Content: " + bos.toString("UTF-8"));
				bos.flush();
				bos.close();
				zis.closeEntry();
			}
			zis.close();
			fis.close();
		} catch (IOException e) {
			e.printStackTrace();
		}
	}
}

code on Tomcat server processing the zip file with Appache FileUploader

    		//item is FileItemStream of Appache FileUploader
    		ZipInputStream dis = new ZipInputStream(new BufferedInputStream(item.openStream()));
    		ZipEntry ze = dis.getNextEntry();
    		byte[] buffer = new byte[2048];
    		while (ze != null) {
    			String fileName = ze.getName();
    			System.out.println("##################### Entry name: " + fileName);

    			int size;
				ByteArrayOutputStream bos = new ByteArrayOutputStream();
				while ((size = dis.read(buffer, 0, buffer.length)) != -1) {
					bos.write(buffer, 0, size);
				}
                dis.closeEntry();
                ze = dis.getNextEntry();
    		}
    		dis.closeEntry();
        	dis.close();

Your help is really appreciated.

Thanks,
Michael

[Maneesh Godbole]

Welcome to the Ranch.

Can you please copy paste the full stack trace?

[Michael An]

Here is the stack trace.

java.util.zip.ZipException: invalid code lengths set
	at java.util.zip.InflaterInputStream.read(InflaterInputStream.java:164)
	at java.util.zip.ZipInputStream.read(ZipInputStream.java:193)
	at com.dotcom.MyServlet.unzip(MyServlet.java:246)
	at com.dotcom.MyServlet.service(MyServlet.java:67)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:848)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:601)
	at org.apache.catalina.security.SecurityUtil$1.run(SecurityUtil.java:274)
	at org.apache.catalina.security.SecurityUtil$1.run(SecurityUtil.java:271)
	at java.security.AccessController.doPrivileged(Native Method)
	at javax.security.auth.Subject.doAsPrivileged(Subject.java:536)
	at org.apache.catalina.security.SecurityUtil.execute(SecurityUtil.java:306)
	at org.apache.catalina.security.SecurityUtil.doAsPrivilege(SecurityUtil.java:166)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:299)
	at org.apache.catalina.core.ApplicationFilterChain.access$000(ApplicationFilterChain.java:57)
	at org.apache.catalina.core.ApplicationFilterChain$1.run(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.ApplicationFilterChain$1.run(ApplicationFilterChain.java:189)
	at java.security.AccessController.doPrivileged(Native Method)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
	...
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:601)
	at org.apache.catalina.security.SecurityUtil$1.run(SecurityUtil.java:274)
	at org.apache.catalina.security.SecurityUtil$1.run(SecurityUtil.java:271)
	at java.security.AccessController.doPrivileged(Native Method)
	at javax.security.auth.Subject.doAsPrivileged(Subject.java:536)
	at org.apache.catalina.security.SecurityUtil.execute(SecurityUtil.java:306)
	at org.apache.catalina.security.SecurityUtil.doAsPrivilege(SecurityUtil.java:246)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
	at org.apache.catalina.core.ApplicationFilterChain.access$000(ApplicationFilterChain.java:57)
	at org.apache.catalina.core.ApplicationFilterChain$1.run(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.ApplicationFilterChain$1.run(ApplicationFilterChain.java:189)
	at java.security.AccessController.doPrivileged(Native Method)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:601)
	at org.apache.catalina.security.SecurityUtil$1.run(SecurityUtil.java:274)
	at org.apache.catalina.security.SecurityUtil$1.run(SecurityUtil.java:271)
	at java.security.AccessController.doPrivileged(Native Method)
	at javax.security.auth.Subject.doAsPrivileged(Subject.java:536)
	at org.apache.catalina.security.SecurityUtil.execute(SecurityUtil.java:306)
	at org.apache.catalina.security.SecurityUtil.doAsPrivilege(SecurityUtil.java:246)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
	at org.apache.catalina.core.ApplicationFilterChain.access$000(ApplicationFilterChain.java:57)
	at org.apache.catalina.core.ApplicationFilterChain$1.run(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.ApplicationFilterChain$1.run(ApplicationFilterChain.java:189)
	at java.security.AccessController.doPrivileged(Native Method)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:168)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)
	at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1002)
	at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:585)
	at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:310)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
	at java.lang.Thread.run(Thread.java:722)|

[Michael An]

i found the problem. it's due to a request wrapper change that checks the size of the request body.

[Aditya Mandavi]

Hi Michael, I'm facing the same issue. Were you able to resolve it?