139 lines
3.7 KiB
Java
139 lines
3.7 KiB
Java
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package the.bytecode.club.bytecodeviewer.util;
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import org.apache.commons.compress.archivers.zip.ZipArchiveEntry;
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import org.apache.commons.compress.archivers.zip.ZipFile;
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import org.apache.commons.io.FilenameUtils;
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import org.objectweb.asm.tree.ClassNode;
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import the.bytecode.club.bytecodeviewer.api.ASMUtil;
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import java.io.*;
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import java.util.Enumeration;
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import java.util.zip.ZipEntry;
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import java.util.zip.ZipInputStream;
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/**
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* @author Konloch
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* @since 7/10/2021
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*/
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public class FileContainerImporter
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{
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private final FileContainer container;
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public FileContainerImporter(FileContainer container)
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{
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this.container = container;
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}
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public void importAsFile() throws IOException
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{
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addUnknownFile(container.file.getName(), new FileInputStream(container.file), false);
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}
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public void importAsZip() throws IOException
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{
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container.resourceClasses.clear();
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container.resourceClassBytes.clear();
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container.resourceFiles.clear();
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try
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{
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//attempt to import using Java ZipInputStream
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importZipInputStream(false);
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}
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catch (IOException e)
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{
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e.printStackTrace();
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//fallback to apache commons ZipFile
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importApacheZipFile(false);
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}
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}
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//sorts the file type from classes or resources
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public void addUnknownFile(String name, InputStream stream, boolean classesOnly) throws IOException
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{
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//TODO remove this .class check and just look for cafebabe
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if (name.endsWith(".class"))
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addClassResource(name, stream);
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else if(!classesOnly)
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addResource(name, stream);
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}
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public void addClassResource(String name, InputStream stream) throws IOException
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{
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byte[] bytes = MiscUtils.getBytes(stream);
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if (MiscUtils.getFileHeader(bytes).equalsIgnoreCase("cafebabe"))
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{
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try
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{
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final ClassNode cn = ASMUtil.bytesToNode(bytes);
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//classes are copied into memory twice
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ClassNode existingNode = container.resourceClasses.put(FilenameUtils.removeExtension(name), cn);
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container.resourceClassBytes.put(name, bytes);
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if( existingNode != null)
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{
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//TODO prompt to ask the user if they would like to overwrite the resource conflict
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// or solve it automatically by creating a new file container for each conflict
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System.err.println("WARNING: Resource Conflict: " + name);
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System.err.println("Suggested Fix: Contact Konloch to add support for resource conflicts");
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}
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}
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catch (Exception e)
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{
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e.printStackTrace();
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}
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} else {
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System.err.println(container.file + ">" + name + ": Header does not start with CAFEBABE, ignoring.");
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}
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}
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public void addResource(String name, InputStream stream) throws IOException
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{
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byte[] bytes = MiscUtils.getBytes(stream);
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container.resourceFiles.put(name, bytes);
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}
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public void importZipInputStream(boolean classesOnly) throws IOException
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{
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ZipInputStream jis = new ZipInputStream(new FileInputStream(container.file));
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ZipEntry entry;
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while ((entry = jis.getNextEntry()) != null)
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{
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final String name = entry.getName();
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//skip directories
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if(entry.isDirectory())
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continue;
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addUnknownFile(name, jis, classesOnly);
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jis.closeEntry();
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}
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jis.close();
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}
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//TODO if this ever fails: import Sun's jarsigner code from JDK 7, re-sign the jar to rebuild the CRC,
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// should also rebuild the archive byte offsets
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public void importApacheZipFile(boolean classesOnly) throws IOException
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{
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try (ZipFile zipFile = new ZipFile(container.file))
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{
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Enumeration<? extends ZipArchiveEntry> entries = zipFile.getEntries();
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while (entries.hasMoreElements())
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{
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ZipArchiveEntry entry = entries.nextElement();
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String name = entry.getName();
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if(entry.isDirectory())
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continue;
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try (InputStream in = zipFile.getInputStream(entry))
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{
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addUnknownFile(name, in, classesOnly);
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}
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}
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}
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}
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}
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