On Wed, Feb 17, 2021 at 5:49 PM <[email protected]> wrote:
> This is an automated email from the ASF dual-hosted git repository.
>
> remm pushed a commit to branch master
> in repository https://gitbox.apache.org/repos/asf/tomcat.git
>
>
> The following commit(s) were added to refs/heads/master by this push:
> new 6ef6875 Filter out classes streams through class file
> transformers
> 6ef6875 is described below
>
> commit 6ef68752dc43f9d459e0ae23a4a767112ab531b9
> Author: remm <[email protected]>
> AuthorDate: Wed Feb 17 16:46:41 2021 +0100
>
> Filter out classes streams through class file transformers
>
> Make getResourceAsStream go through the ClassFileTransformer(s) for
> .class resources. In a way this is consistent, but the actual reason is
> helping JSP work better [JDT uses that to do its compilation] if
> choosing a very basic runtime Jakarta conversion. I'm not seeing any
> basis for doing it, but it's completely unlikely to break anything
> either.
> ---
> .../catalina/loader/WebappClassLoaderBase.java | 37
> ++++++++++++++++++++++
> 1 file changed, 37 insertions(+)
>
> diff --git a/java/org/apache/catalina/loader/WebappClassLoaderBase.java
> b/java/org/apache/catalina/loader/WebappClassLoaderBase.java
> index 2bc07a1..d809c3e 100644
> --- a/java/org/apache/catalina/loader/WebappClassLoaderBase.java
> +++ b/java/org/apache/catalina/loader/WebappClassLoaderBase.java
> @@ -16,6 +16,8 @@
> */
> package org.apache.catalina.loader;
>
> +import java.io.ByteArrayInputStream;
> +import java.io.ByteArrayOutputStream;
> import java.io.File;
> import java.io.FilePermission;
> import java.io.IOException;
> @@ -1136,6 +1138,41 @@ public abstract class WebappClassLoaderBase extends
> URLClassLoader
> WebResource resource = resources.getClassLoaderResource(path);
> if (resource.exists()) {
> stream = resource.getInputStream();
> + // Filter out .class resources through the ClassFileTranformer
> + if (name.endsWith(".class") && transformers.size() > 0) {
>
nit: you could use CLASS_FILE_SUFFIX as you did below
> + // If the resource is a class, decorate it with any
> attached transformers
> + ByteArrayOutputStream baos = new ByteArrayOutputStream();
> + byte[] buf = new byte[8192];
> + int numRead;
> + try {
> + while ((numRead = stream.read(buf)) >= 0) {
> + baos.write(buf, 0, numRead);
> + }
> + } catch (IOException e) {
> +
> log.error(sm.getString("webappClassLoader.transformError", name), e);
> + return null;
> + } finally {
> + try {
> + stream.close();
> + } catch (IOException e) {
> + }
> + }
> + byte[] binaryContent = baos.toByteArray();
> + String internalName = path.substring(1, path.length() -
> CLASS_FILE_SUFFIX.length());
> + for (ClassFileTransformer transformer :
> this.transformers) {
> + try {
> + byte[] transformed = transformer.transform(
> + this, internalName, null, null,
> binaryContent);
> + if (transformed != null) {
> + binaryContent = transformed;
> + }
> + } catch (IllegalClassFormatException e) {
> +
> log.error(sm.getString("webappClassLoader.transformError", name), e);
> + return null;
> + }
> + }
> + stream = new ByteArrayInputStream(binaryContent);
> + }
> trackLastModified(path, resource);
> }
> try {
>
>
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