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Jython is an implementation of the high-level, dynamic, object-oriented
language Python written in 100% Pure Java, and seamlessly integrated with
the Java platform. It thus allows you to run Python on any Java platform.
/* Copyright (c) 2007 Jython Developers */
package org.python.modules.zipimport;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.util.Date;
import java.util.Enumeration;
import java.util.zip.ZipEntry;
import java.util.zip.ZipFile;
import org.python.core.ArgParser;
import org.python.core.Py;
import org.python.core.PyDictionary;
import org.python.core.PyException;
import org.python.core.PyInteger;
import org.python.core.PyLong;
import org.python.core.PyObject;
import org.python.core.PyString;
import org.python.core.PySystemState;
import org.python.core.PyTuple;
import org.python.core.PyType;
import org.python.core.util.FileUtil;
import org.python.core.util.StringUtil;
import org.python.core.util.importer;
import org.python.expose.ExposedGet;
import org.python.expose.ExposedMethod;
import org.python.expose.ExposedNew;
import org.python.expose.ExposedType;
/**
* Import Python modules and packages from ZIP-format archives.
*
* @author Philip Jenvey
*/
@ExposedType(name = "zipimport.zipimporter", base = PyObject.class)
public class zipimporter extends importer {
public static final PyType TYPE = PyType.fromClass(zipimporter.class);
@ExposedGet
public static final PyString __doc__ = new PyString(
"zipimporter(archivepath) -> zipimporter object\n" +
"\n" +
"Create a new zipimporter instance. 'archivepath' must be a path to\n" +
"a zipfile. ZipImportError is raised if 'archivepath' doesn't point to\n" +
"a valid Zip archive.");
/** Pathname of the Zip archive */
@ExposedGet
public String archive;
/** File prefix: "a/sub/directory/" */
@ExposedGet
public String prefix;
/** Dict with file info {path: tocEntry} */
@ExposedGet(name = "_files")
public PyObject files;
/** The PySystemState this zipimporter is associated with */
private PySystemState sys;
public zipimporter() {
super();
}
public zipimporter(PyType subType) {
super(subType);
}
public zipimporter(String path) {
super();
zipimporter___init__(path);
}
@ExposedNew
@ExposedMethod
final void zipimporter___init__(PyObject[] args, String[] kwds) {
ArgParser ap = new ArgParser("__init__", args, kwds, new String[] {"path"});
String path = ap.getString(0);
zipimporter___init__(path);
}
private void zipimporter___init__(String path) {
if (path == null || path.length() == 0) {
throw zipimport.ZipImportError("archive path is empty");
}
File pathFile = new File(path);
sys = Py.getSystemState();
prefix = "";
while (true) {
File fullPathFile = new File(sys.getPath(pathFile.getPath()));
try {
if (fullPathFile.isFile()) {
archive = pathFile.getPath();
break;
}
} catch (SecurityException se) {
// continue
}
// back up one path element
File parentFile = pathFile.getParentFile();
if (parentFile == null) {
break;
}
prefix = pathFile.getName() + File.separator + prefix;
pathFile = parentFile;
}
if (archive != null) {
files = zipimport._zip_directory_cache.__finditem__(archive);
if (files == null) {
files = readDirectory(archive);
zipimport._zip_directory_cache.__setitem__(archive, files);
}
} else {
throw zipimport.ZipImportError("not a Zip file");
}
if (prefix != "" && !prefix.endsWith(File.separator)) {
prefix += File.separator;
}
}
public PyObject find_module(String fullname) {
return zipimporter_find_module(fullname, null);
}
/**
* Find the module for the fully qualified name.
*
* @param fullname the fully qualified name of the module
* @param path if not installed on the meta-path None or a module path
* @return a loader instance if this importer can load the module, None
* otherwise
*/
public PyObject find_module(String fullname, String path) {
return zipimporter_find_module(fullname, path);
}
@ExposedMethod(defaults = "null")
final PyObject zipimporter_find_module(String fullname, String path) {
return importer_find_module(fullname, path);
}
/**
* Load a module for the fully qualified name.
*
* @param fullname the fully qualified name of the module
* @return a loaded PyModule
*/
public PyObject load_module(String fullname) {
return zipimporter_load_module(fullname);
}
@ExposedMethod
final PyObject zipimporter_load_module(String fullname) {
return importer_load_module(fullname);
}
/**
* Return the uncompressed data for the file at the specified path
* as a String.
*
* @param path a String path name within the archive
* @return a String of data in binary mode (no CRLF)
*/
public String get_data(String path) {
return zipimporter_get_data(path);
}
@ExposedMethod
final String zipimporter_get_data(String path) {
int len = archive.length();
if (len < path.length() && path.startsWith(archive + File.separator)) {
path = path.substring(len + 1);
}
PyObject tocEntry = files.__finditem__(path);
if (tocEntry == null) {
throw Py.IOError(path);
}
Bundle zipBundle = makeBundle(path, tocEntry);
byte[] data;
try {
data = FileUtil.readBytes(zipBundle.inputStream);
} catch (IOException ioe) {
throw Py.IOError(ioe);
} finally {
zipBundle.close();
}
return StringUtil.fromBytes(data);
}
/**
* Return a boolean signifying whether the module is a package or
* not.
*
* @param fullname the fully qualified name of the module
* @return a boolean describing if the module is a package
*/
public boolean is_package(String fullname) {
return zipimporter_is_package(fullname);
}
@ExposedMethod
final boolean zipimporter_is_package(String fullname) {
ModuleInfo moduleInfo = getModuleInfo(fullname);
if (moduleInfo == ModuleInfo.NOT_FOUND) {
throw zipimport.ZipImportError(String.format("can't find module '%s'", fullname));
}
return moduleInfo == ModuleInfo.PACKAGE;
}
/**
* Return the code object associated with the module.
*
* @param fullname the fully qualified name of the module
* @return the module's PyCode object or None
*/
public PyObject get_code(String fullname) {
return zipimporter_get_code(fullname);
}
@ExposedMethod
final PyObject zipimporter_get_code(String fullname) {
ModuleCodeData moduleCodeData = getModuleCode(fullname);
if (moduleCodeData != null) {
return moduleCodeData.code;
}
return Py.None;
}
/**
* Return the source code for the module as a string (using
* newline characters for line endings)
*
* @param fullname the fully qualified name of the module
* @return a String of the module's source code or null
*/
public String get_source(String fullname) {
return zipimporter_get_source(fullname);
}
@ExposedMethod
final String zipimporter_get_source(String fullname) {
ModuleInfo moduleInfo = getModuleInfo(fullname);
if (moduleInfo == ModuleInfo.ERROR) {
return null;
}
if (moduleInfo == ModuleInfo.NOT_FOUND) {
throw zipimport.ZipImportError(String.format("can't find module '%s'", fullname));
}
String path = makeFilename(fullname);
if (moduleInfo == ModuleInfo.PACKAGE) {
path += File.separator + "__init__.py";
} else {
path += ".py";
}
PyObject tocEntry = files.__finditem__(path);
if (tocEntry != null) {
return get_data(path);
}
// we have the module, but no source
return null;
}
/**
* Given a path to a compressed file in the archive, return the
* file's (uncompressed) data stream in a ZipBundle.
*
* @param datapath file's filename inside of the archive
* @return a ZipBundle with an InputStream to the file's
* uncompressed data
*/
@Override
public ZipBundle makeBundle(String datapath, PyObject entry) {
datapath = datapath.replace(File.separatorChar, '/');
ZipFile zipArchive;
try {
zipArchive = new ZipFile(new File(sys.getPath(archive)));
} catch (IOException ioe) {
throw zipimport.ZipImportError("zipimport: can not open file: " + archive);
}
ZipEntry dataEntry = zipArchive.getEntry(datapath);
try {
return new ZipBundle(zipArchive, zipArchive.getInputStream(dataEntry));
} catch (IOException ioe) {
Py.writeDebug("import", "zipimporter.getDataStream exception: " + ioe.toString());
throw zipimport.ZipImportError("zipimport: can not open file: " + archive);
}
}
@Override
protected long getSourceMtime(String path) {
String sourcePath = path.substring(0, path.length() - 9) + ".py";
PyObject sourceTocEntry = files.__finditem__(sourcePath);
if (sourceTocEntry == null) {
return -1;
}
int time;
int date;
try {
time = sourceTocEntry.__finditem__(5).asInt();
date = sourceTocEntry.__finditem__(6).asInt();
} catch (PyException pye) {
if (!pye.match(Py.TypeError)) {
throw pye;
}
time = -1;
date = -1;
}
return dosTimeToEpoch(time, date);
}
/**
* readDirectory(archive) -> files dict (new reference)
*
* Given a path to a Zip archive, build a dict, mapping file names
* (local to the archive, using SEP as a separator) to toc entries.
*
* @param archive PyString path to the archive
* @return a PyDictionary of tocEntrys
* @see #readZipFile(ZipFile, PyObject)
*/
private PyObject readDirectory(String archive) {
File file = new File(sys.getPath(archive));
if (!file.canRead()) {
throw zipimport.ZipImportError(String.format("can't open Zip file: '%s'", archive));
}
ZipFile zipFile;
try {
zipFile = new ZipFile(file);
} catch (IOException ioe) {
throw zipimport.ZipImportError(String.format("can't read Zip file: '%s'", archive));
}
PyObject files = new PyDictionary();
try {
readZipFile(zipFile, files);
} finally {
try {
zipFile.close();
} catch (IOException ioe) {
throw Py.IOError(ioe);
}
}
return files;
}
/**
* Read ZipFile metadata into a dict of toc entries.
*
* A tocEntry is a tuple:
*
* (__file__, # value to use for __file__, available for all files
* compress, # compression kind; 0 for uncompressed
* data_size, # size of compressed data on disk
* file_size, # size of decompressed data
* file_offset, # offset of file header from start of archive (or -1 in Jython)
* time, # mod time of file (in dos format)
* date, # mod data of file (in dos format)
* crc, # crc checksum of the data
* )
*
* Directories can be recognized by the trailing SEP in the name, data_size and
* file_offset are 0.
*
* @param zipFile ZipFile to read
* @param files a dict-like PyObject
*/
private void readZipFile(ZipFile zipFile, PyObject files) {
for (Enumeration zipEntries = zipFile.entries();
zipEntries.hasMoreElements();) {
ZipEntry zipEntry = zipEntries.nextElement();
String name = zipEntry.getName().replace('/', File.separatorChar);
PyObject __file__ = new PyString(archive + File.separator + name);
PyObject compress = Py.newInteger(zipEntry.getMethod());
PyObject data_size = new PyLong(zipEntry.getCompressedSize());
PyObject file_size = new PyLong(zipEntry.getSize());
// file_offset is a CPython optimization; it's used to seek directly to the
// file when reading it later. Jython doesn't do this nor is the offset
// available
PyObject file_offset = Py.newInteger(-1);
PyObject time = new PyInteger(epochToDosTime(zipEntry.getTime()));
PyObject date = new PyInteger(epochToDosDate(zipEntry.getTime()));
PyObject crc = new PyLong(zipEntry.getCrc());
PyTuple entry = new PyTuple(__file__, compress, data_size, file_size, file_offset,
time, date, crc);
files.__setitem__(new PyString(name), entry);
}
}
@Override
protected String getSeparator() {
return File.separator;
}
@Override
protected String makeFilename(String fullname) {
return prefix + getSubname(fullname).replace('.', File.separatorChar);
}
@Override
protected String makePackagePath(String fullname) {
return archive + File.separator + prefix + getSubname(fullname);
}
@Override
protected String makeFilePath(String fullname) {
return makePackagePath(fullname);
}
@Override
protected PyObject makeEntry(String fullFilename) {
return files.__finditem__(fullFilename);
}
/**
* Return fullname.split(".")[-1].
*
* @param fullname
* a String value
* @return a split(".")[-1] String value
*/
protected String getSubname(String fullname) {
int i = fullname.lastIndexOf(".");
if (i >= 0) {
return fullname.substring(i + 1);
}
return fullname;
}
/**
* Convert a time in milliseconds since epoch to DOS date format
*
* @param time in milliseconds, a long value
* @return an int, dos style date value
*/
@SuppressWarnings("deprecation")
private int epochToDosDate(long time) {
// This and the other conversion methods are cut and pasted from
// java.util.zip.ZipEntry: hence the use deprecated Date APIs
Date d = new Date(time);
int year = d.getYear() + 1900;
if (year < 1980) {
return (1 << 21) | (1 << 16);
}
return (year - 1980) << 9 | (d.getMonth() + 1) << 5 | d.getDate() << 0;
}
/**
* Convert a time in milliseconds since epoch to DOS time format
*
* @param time in milliseconds, a long value
* @return an int, dos style time value
*/
@SuppressWarnings("deprecation")
private int epochToDosTime(long time) {
Date d = new Date(time);
return d.getHours() << 11 | d.getMinutes() << 5 | d.getSeconds() >> 1;
}
/**
* Convert the date/time values found in the Zip archive to a long
* time (in milliseconds) value.
*
* @param dostime a dos style timestamp (only time) integer
* @param dosdate a dos style date integer
* @return a long time (in milliseconds) value
*/
@SuppressWarnings("deprecation")
private long dosTimeToEpoch(int dosTime, int dosDate) {
Date d = new Date(((dosDate >> 9) & 0x7f) + 80,
((dosDate >> 5) & 0x0f) - 1,
dosDate & 0x1f,
(dosTime >> 11) & 0x1f,
(dosTime >> 5) & 0x3f,
(dosTime & 0x1f) * 2);
return d.getTime();
}
@Override
public String toString() {
return zipimporter_toString();
}
@ExposedMethod(names = "__repr__")
final String zipimporter_toString() {
String displayArchive = archive != null ? archive : "???";
if (prefix != null && !"".equals(prefix)) {
return String.format("",
displayArchive, File.separatorChar, prefix);
}
return String.format("", displayArchive);
}
/**
* ZipBundle is a ZipFile and one of its InputStreams, bundled together so the ZipFile can be
* closed when finished with its InputStream.
*/
private class ZipBundle extends Bundle {
ZipFile zipFile;
public ZipBundle(ZipFile zipFile, InputStream inputStream) {
super(inputStream);
this.zipFile = zipFile;
}
/**
* Close the ZipFile; implicitly closes all of its InputStreams.
*
* Raises an IOError if a problem occurred.
*/
@Override
public void close() {
try {
zipFile.close();
} catch (IOException ioe) {
throw Py.IOError(ioe);
}
}
}
}