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/*
* IzPack - Copyright 2001-2008 Julien Ponge, All Rights Reserved.
*
* http://izpack.org/
* http://izpack.codehaus.org/
*
* Copyright 2007 Vladimir Ralev
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.izforge.izpack.installer;
import com.izforge.izpack.ExecutableFile;
import com.izforge.izpack.Pack;
import com.izforge.izpack.ParsableFile;
import com.izforge.izpack.UpdateCheck;
import com.izforge.izpack.compiler.CompilerException;
import com.izforge.izpack.compiler.PackInfo;
import com.izforge.izpack.util.OsConstraint;
import net.n3.nanoxml.*;
import java.io.File;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.*;
/**
* This class enumerates the availabe packs at the web repository. Parses the config files
* - install.xml, packsinfo.xml, langpacks and is used to override the static configuration
* in the installer jar.
*
* @author Vladimir Ralev
* @version $Revision: 1.1 $
*/
public class WebRepositoryAccessor
{
/**
* URL to remote install.xml
*/
private String installXmlUrl;
/**
* Base repository URL
*/
private String baseUrl;
/**
* install.xml
*/
private String installXmlString;
/**
* packsinfo.xml contains nbytes, pack name and pack id
*/
private String packsInfo;
/**
* list of PackInfo entries
*/
private ArrayList packs;
/**
* Constant for checking attributes.
*/
private static boolean YES = true;
/**
* Constant for checking attributes.
*/
private static boolean NO = false;
/**
* Files to be looked for at the repository base url
*/
private static final String installFilename = "install.xml";
private static final String packsinfoFilename = "packsinfo.xml";
/**
* Files being downloaded in the buffer, 1MB max
*/
private static final int BUFFER_SIZE = 1000000;
/**
* Create a new WebRepositoryAccessor.
*
* @param urlbase
*/
public WebRepositoryAccessor(String urlbase)
{
this.installXmlUrl = urlbase + "/" + installFilename;
this.baseUrl = urlbase;
}
/**
* Get the list of the packs from the remore install.xml
*
* @return the packs list
*/
public ArrayList getOnlinePacks()
{
readConfig();
packs = parsePacks();
readPacksInfo();
parsePacksInfo();
return packs;
}
/**
* Returns the contents of a file at url as a string (must be a text file)
*
* @param url
* @return the content
*/
private String stringFromURL(String url)
{
int max = BUFFER_SIZE;
byte[] raw = new byte[max];
InputStream in = null;
try
{
WebAccessor w = new WebAccessor(null);
in = w.openInputStream(new URL(url));
if (in == null)
{
throw new RuntimeException("Unable to open network stream");
}
int r = in.read(raw);
int off = r;
while (r > 0)
{
r = in.read(raw, off, max - off);
off += r;
}
return new String(raw);
}
catch (Exception e)
{
System.out.println(e + " while trying to download " + url);
return null;
}
finally
{
try
{
if (in != null)
{
in.close();
}
}
catch (Exception e)
{
}
}
}
/**
* Reads the install.xml into confgiString
*/
private void readConfig()
{
installXmlString = stringFromURL(installXmlUrl);
}
/**
* Reads packsinfo.xml
*/
private void readPacksInfo()
{
String url = this.baseUrl + "/" + packsinfoFilename;
packsInfo = stringFromURL(url);
}
/**
* Parse install.xml and return the list of packs
*
* @return the list of packs
*/
private ArrayList parsePacks()
{
try
{
IXMLParser parser = XMLParserFactory.createDefaultXMLParser();
IXMLReader reader = StdXMLReader.stringReader(installXmlString);
parser.setReader(reader);
XMLElement xml = (XMLElement) parser.parse();
return loadPacksList(xml);
}
catch (Exception e)
{
System.out.println("WARN: Unable to parse install.xml");
return null;
}
}
/**
* Parse packsinfo.xml, fill the nbytes field, which is not available at runtime
* otherwise.
*/
private void parsePacksInfo()
{
try
{
IXMLParser parser = XMLParserFactory.createDefaultXMLParser();
IXMLReader reader = StdXMLReader.stringReader(packsInfo);
parser.setReader(reader);
XMLElement xml = (XMLElement) parser.parse();
XMLElement root = xml; //requireChildNamed(xml, "packs");
for (int q = 0; q < root.getChildrenCount(); q++)
{
XMLElement ch = root.getChildAtIndex(q);
PackInfo pi = packs.get(q);
Pack p = pi.getPack();
p.nbytes = Long.parseLong(ch.getAttribute("nbytes"));
}
}
catch (Exception e)
{
System.out.println("WARN: Unable to parse packsinfo.xml");
}
}
/**
* First download the jar file. The create the input stream from the
* downloaded file. This is because the Jar connection's openInputStream
* will blocks until the whole jar in order to unzip it (there is no way
* to see the download progress there).
*
* @param url
* @return the url
*/
public static String getCachedUrl(String url, String tempFolder) throws Exception
{
int max = BUFFER_SIZE;
byte[] raw = new byte[max];
try
{
WebAccessor w = new WebAccessor(null);
InputStream in = w.openInputStream(new URL(url));
int r = in.read(raw);
File tempDir = new File(tempFolder);
tempDir.mkdirs();
File temp = File.createTempFile("izpacktempfile", "jar", new File(tempFolder));
FileOutputStream fos = new FileOutputStream(temp);
String path = "file:///" + temp.getAbsolutePath();
while (r > 0)
{
fos.write(raw, 0, r);
r = in.read(raw);
}
in.close();
fos.close();
return path;
}
catch (SecurityException e)
{
System.out.println(e + " while trying to write temp file: " + tempFolder);
throw e;
}
catch (Exception e)
{
System.out.println(e + " while trying to download " + url);
throw e;
}
}
protected ArrayList loadPacksList(XMLElement data) throws CompilerException
{
ArrayList result = new ArrayList();
// Initialisation
XMLElement root = requireChildNamed(data, "packs");
// at least one pack is required
Vector packElements = root.getChildrenNamed("pack");
if (packElements.isEmpty())
{
parseError(root, " requires a ");
}
Iterator packIter = packElements.iterator();
while (packIter.hasNext())
{
XMLElement el = packIter.next();
// Trivial initialisations
String name = requireAttribute(el, "name");
String id = el.getAttribute("id");
boolean loose = "true".equalsIgnoreCase(el.getAttribute("loose", "false"));
String description = requireChildNamed(el, "description").getContent();
boolean required = requireYesNoAttribute(el, "required");
String group = el.getAttribute("group");
String installGroups = el.getAttribute("installGroups");
String excludeGroup = el.getAttribute("excludeGroup");
boolean uninstall = "yes".equalsIgnoreCase(el.getAttribute("uninstall", "yes"));
String parent = el.getAttribute("parent");
if (required && excludeGroup != null)
{
parseError(el, "Pack, which has excludeGroup can not be required.", new Exception(
"Pack, which has excludeGroup can not be required."));
}
PackInfo pack = new PackInfo(name, id, description, required, loose, excludeGroup, uninstall);
pack.setOsConstraints(OsConstraint.getOsList(el)); // TODO:
pack.setParent(parent);
// unverified
// if the pack belongs to an excludeGroup it's not preselected by default
if (excludeGroup == null)
{
pack.setPreselected(validateYesNoAttribute(el, "preselected", YES));
}
else
{
pack.setPreselected(validateYesNoAttribute(el, "preselected", NO));
}
// Set the pack group if specified
if (group != null)
{
pack.setGroup(group);
}
// Set the pack install groups if specified
if (installGroups != null)
{
StringTokenizer st = new StringTokenizer(installGroups, ",");
while (st.hasMoreTokens())
{
String igroup = st.nextToken();
pack.addInstallGroup(igroup);
}
}
// We get the parsables list
Iterator iter = el.getChildrenNamed("parsable").iterator();
while (iter.hasNext())
{
XMLElement p = iter.next();
String target = requireAttribute(p, "targetfile");
String type = p.getAttribute("type", "plain");
String encoding = p.getAttribute("encoding", null);
List osList = OsConstraint.getOsList(p); // TODO: unverified
pack.addParsable(new ParsableFile(target, type, encoding, osList));
}
// We get the executables list
iter = el.getChildrenNamed("executable").iterator();
while (iter.hasNext())
{
XMLElement e = iter.next();
ExecutableFile executable = new ExecutableFile();
String val; // temp value
executable.path = requireAttribute(e, "targetfile");
// when to execute this executable
val = e.getAttribute("stage", "never");
if ("postinstall".equalsIgnoreCase(val))
{
executable.executionStage = ExecutableFile.POSTINSTALL;
}
else if ("uninstall".equalsIgnoreCase(val))
{
executable.executionStage = ExecutableFile.UNINSTALL;
}
// type of this executable
val = e.getAttribute("type", "bin");
if ("jar".equalsIgnoreCase(val))
{
executable.type = ExecutableFile.JAR;
executable.mainClass = e.getAttribute("class"); // executable
// class
}
// what to do if execution fails
val = e.getAttribute("failure", "ask");
if ("abort".equalsIgnoreCase(val))
{
executable.onFailure = ExecutableFile.ABORT;
}
else if ("warn".equalsIgnoreCase(val))
{
executable.onFailure = ExecutableFile.WARN;
}
// whether to keep the executable after executing it
val = e.getAttribute("keep");
executable.keepFile = "true".equalsIgnoreCase(val);
// get arguments for this executable
XMLElement args = e.getFirstChildNamed("args");
if (null != args)
{
Iterator argIterator = args.getChildrenNamed("arg").iterator();
while (argIterator.hasNext())
{
XMLElement arg = argIterator.next();
executable.argList.add(requireAttribute(arg, "value"));
}
}
executable.osList = OsConstraint.getOsList(e); // TODO:
// unverified
pack.addExecutable(executable);
}
// get the updatechecks list
iter = el.getChildrenNamed("updatecheck").iterator();
while (iter.hasNext())
{
XMLElement f = iter.next();
String casesensitive = f.getAttribute("casesensitive");
// get includes and excludes
ArrayList includesList = new ArrayList();
ArrayList excludesList = new ArrayList();
// get includes and excludes
Iterator include_it = f.getChildrenNamed("include").iterator();
while (include_it.hasNext())
{
XMLElement inc_el = include_it.next();
includesList.add(requireAttribute(inc_el, "name"));
}
Iterator exclude_it = f.getChildrenNamed("exclude").iterator();
while (exclude_it.hasNext())
{
XMLElement excl_el = exclude_it.next();
excludesList.add(requireAttribute(excl_el, "name"));
}
pack.addUpdateCheck(new UpdateCheck(includesList, excludesList, casesensitive));
}
// We get the dependencies
iter = el.getChildrenNamed("depends").iterator();
while (iter.hasNext())
{
XMLElement dep = iter.next();
String depName = requireAttribute(dep, "packname");
pack.addDependency(depName);
}
result.add(pack);
}
return result;
}
/**
* Create parse error with consistent messages. Includes file name. For use When parent is
* unknown.
*
* @param message Brief message explaining error
*/
protected void parseError(String message) throws CompilerException
{
throw new CompilerException(installFilename + ":" + message);
}
/**
* Create parse error with consistent messages. Includes file name and line # of parent. It is
* an error for 'parent' to be null.
*
* @param parent The element in which the error occured
* @param message Brief message explaining error
*/
protected void parseError(XMLElement parent, String message) throws CompilerException
{
throw new CompilerException(installFilename + ":" + parent.getLineNr() + ": " + message);
}
/**
* Create a chained parse error with consistent messages. Includes file name and line # of
* parent. It is an error for 'parent' to be null.
*
* @param parent The element in which the error occured
* @param message Brief message explaining error
*/
protected void parseError(XMLElement parent, String message, Throwable cause) throws CompilerException
{
throw new CompilerException(installFilename + ":" + parent.getLineNr() + ": " + message, cause);
}
/**
* Create a parse warning with consistent messages. Includes file name and line # of parent. It
* is an error for 'parent' to be null.
*
* @param parent The element in which the warning occured
* @param message Warning message
*/
protected void parseWarn(XMLElement parent, String message)
{
System.out.println(installFilename + ":" + parent.getLineNr() + ": " + message);
}
/**
* Call getFirstChildNamed on the parent, producing a meaningful error message on failure. It is
* an error for 'parent' to be null.
*
* @param parent The element to search for a child
* @param name Name of the child element to get
*/
protected XMLElement requireChildNamed(XMLElement parent, String name) throws CompilerException
{
XMLElement child = parent.getFirstChildNamed(name);
if (child == null)
{
parseError(parent, "<" + parent.getName() + "> requires child <" + name + ">");
}
return child;
}
/**
* Call getContent on an element, producing a meaningful error message if not present, or empty,
* or a valid URL. It is an error for 'element' to be null.
*
* @param element The element to get content of
*/
protected URL requireURLContent(XMLElement element) throws CompilerException
{
URL url = null;
try
{
url = new URL(requireContent(element));
}
catch (MalformedURLException x)
{
parseError(element, "<" + element.getName() + "> requires valid URL", x);
}
return url;
}
/**
* Call getContent on an element, producing a meaningful error message if not present, or empty.
* It is an error for 'element' to be null.
*
* @param element The element to get content of
*/
protected String requireContent(XMLElement element) throws CompilerException
{
String content = element.getContent();
if (content == null || content.length() == 0)
{
parseError(element, "<" + element.getName() + "> requires content");
}
return content;
}
/**
* Call getAttribute on an element, producing a meaningful error message if not present, or
* empty. It is an error for 'element' or 'attribute' to be null.
*
* @param element The element to get the attribute value of
* @param attribute The name of the attribute to get
*/
protected String requireAttribute(XMLElement element, String attribute) throws CompilerException
{
String value = element.getAttribute(attribute);
if (value == null)
{
parseError(element, "<" + element.getName() + "> requires attribute '" + attribute + "'");
}
return value;
}
/**
* Get a required attribute of an element, ensuring it is an integer. A meaningful error message
* is generated as a CompilerException if not present or parseable as an int. It is an error for
* 'element' or 'attribute' to be null.
*
* @param element The element to get the attribute value of
* @param attribute The name of the attribute to get
*/
protected int requireIntAttribute(XMLElement element, String attribute) throws CompilerException
{
String value = element.getAttribute(attribute);
if (value == null || value.length() == 0)
{
parseError(element, "<" + element.getName() + "> requires attribute '" + attribute + "'");
}
try
{
return Integer.parseInt(value);
}
catch (NumberFormatException x)
{
parseError(element, "'" + attribute + "' must be an integer");
}
return 0; // never happens
}
/**
* Call getAttribute on an element, producing a meaningful error message if not present, or one
* of "yes" or "no". It is an error for 'element' or 'attribute' to be null.
*
* @param element The element to get the attribute value of
* @param attribute The name of the attribute to get
*/
protected boolean requireYesNoAttribute(XMLElement element, String attribute) throws CompilerException
{
String value = requireAttribute(element, attribute);
if ("yes".equalsIgnoreCase(value))
{
return true;
}
if ("no".equalsIgnoreCase(value))
{
return false;
}
parseError(element, "<" + element.getName() + "> invalid attribute '" + attribute + "': Expected (yes|no)");
return false; // never happens
}
/**
* Call getAttribute on an element, producing a meaningful warning if not "yes" or "no". If the
* 'element' or 'attribute' are null, the default value is returned.
*
* @param element The element to get the attribute value of
* @param attribute The name of the attribute to get
* @param defaultValue Value returned if attribute not present or invalid
*/
protected boolean validateYesNoAttribute(XMLElement element, String attribute, boolean defaultValue)
{
if (element == null)
{
return defaultValue;
}
String value = element.getAttribute(attribute, (defaultValue ? "yes" : "no"));
if ("yes".equalsIgnoreCase(value))
{
return true;
}
if ("no".equalsIgnoreCase(value))
{
return false;
}
// TODO: should this be an error if it's present but "none of the
// above"?
parseWarn(element, "<" + element.getName() + "> invalid attribute '" + attribute
+ "': Expected (yes|no) if present");
return defaultValue;
}
}
