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// Copyright 2017 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.config.model.application.provider;
import com.yahoo.component.Version;
import com.yahoo.io.IOUtils;
import java.util.logging.Level;
import org.osgi.framework.Bundle;
import org.xml.sax.SAXException;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.JarURLConnection;
import java.net.URL;
import java.util.Enumeration;
import java.util.jar.JarEntry;
import java.util.jar.JarFile;
import java.util.logging.Logger;
import static com.yahoo.vespa.defaults.Defaults.getDefaults;
import static java.nio.file.Files.createTempDirectory;
import static org.osgi.framework.FrameworkUtil.getBundle;
/**
* Wrapper class for schema validators for application package xml files
*
* @author hmusum
*/
public class SchemaValidators {
private static final String schemaDirBase = System.getProperty("java.io.tmpdir", File.separator + "tmp" + File.separator + "vespa");
private static final Logger log = Logger.getLogger(SchemaValidators.class.getName());
private static final String servicesXmlSchemaName = "services.rnc";
private static final String hostsXmlSchemaName = "hosts.rnc";
private static final String deploymentXmlSchemaName = "deployment.rnc";
private static final String validationOverridesXmlSchemaName = "validation-overrides.rnc";
private static final String containerIncludeXmlSchemaName = "container-include.rnc";
private static final String routingStandaloneXmlSchemaName = "routing-standalone.rnc";
private final SchemaValidator servicesXmlValidator;
private final SchemaValidator hostsXmlValidator;
private final SchemaValidator deploymentXmlValidator;
private final SchemaValidator validationOverridesXmlValidator;
private final SchemaValidator containerIncludeXmlValidator;
private final SchemaValidator routingStandaloneXmlValidator;
/**
* Initializes the validator by using the given file as schema file
*
* @param vespaVersion the version of Vespa we should validate against
*/
public SchemaValidators(Version vespaVersion) {
File schemaDir = null;
try {
schemaDir = saveSchemasFromJar(new File(SchemaValidators.schemaDirBase), vespaVersion);
servicesXmlValidator = createValidator(schemaDir, servicesXmlSchemaName);
hostsXmlValidator = createValidator(schemaDir, hostsXmlSchemaName);
deploymentXmlValidator = createValidator(schemaDir, deploymentXmlSchemaName);
validationOverridesXmlValidator = createValidator(schemaDir, validationOverridesXmlSchemaName);
containerIncludeXmlValidator = createValidator(schemaDir, containerIncludeXmlSchemaName);
routingStandaloneXmlValidator = createValidator(schemaDir, routingStandaloneXmlSchemaName);
} catch (IOException ioe) {
throw new RuntimeException(ioe);
} catch (Exception e) {
throw e;
} finally {
if (schemaDir != null)
IOUtils.recursiveDeleteDir(schemaDir);
}
}
public SchemaValidator servicesXmlValidator() {
return servicesXmlValidator;
}
public SchemaValidator hostsXmlValidator() {
return hostsXmlValidator;
}
public SchemaValidator deploymentXmlValidator() {
return deploymentXmlValidator;
}
SchemaValidator validationOverridesXmlValidator() {
return validationOverridesXmlValidator;
}
SchemaValidator containerIncludeXmlValidator() {
return containerIncludeXmlValidator;
}
SchemaValidator routingStandaloneXmlValidator() {
return routingStandaloneXmlValidator;
}
/**
* Look for the schema files in config-model.jar and saves them on temp dir. Uses schema files
* in $VESPA_HOME/share/vespa/schema/[major-version].x/ otherwise
*
* @return the directory the schema files are stored in
* @throws IOException if it is not possible to read schema files
*/
private File saveSchemasFromJar(File tmpBase, Version vespaVersion) throws IOException {
Class<? extends SchemaValidators> schemaValidatorClass = this.getClass();
ClassLoader classLoader = schemaValidatorClass.getClassLoader();
Enumeration<URL> uris = classLoader.getResources("schema");
if (uris == null) throw new IllegalArgumentException("Could not find XML schemas ");
File tmpDir = createTempDirectory(tmpBase.toPath(), "vespa").toFile();
log.log(LogLevel.DEBUG, "Will save all XML schemas for " + vespaVersion + " to " + tmpDir);
while (uris.hasMoreElements()) {
URL u = uris.nextElement();
log.log(LogLevel.DEBUG, "uri for resource 'schema'=" + u.toString());
// TODO: When is this the case? Remove?
if ("jar".equals(u.getProtocol())) {
JarURLConnection jarConnection = (JarURLConnection) u.openConnection();
JarFile jarFile = jarConnection.getJarFile();
for (Enumeration<JarEntry> entries = jarFile.entries(); entries.hasMoreElements(); ) {
JarEntry je = entries.nextElement();
if (je.getName().startsWith("schema/") && je.getName().endsWith(".rnc")) {
writeContentsToFile(tmpDir, je.getName(), jarFile.getInputStream(je));
}
}
jarFile.close();
} else if ("bundle".equals(u.getProtocol())) {
Bundle bundle = getBundle(schemaValidatorClass);
log.log(LogLevel.DEBUG, "bundle=" + bundle);
// TODO: Hack to handle cases where bundle=null (which seems to always be the case with config-model-fat-amended.jar)
if (bundle == null) {
String pathPrefix = getDefaults().underVespaHome("share/vespa/schema/");
File schemaPath = new File(pathPrefix + "version/" + vespaVersion.getMajor() + ".x/schema/");
// Fallback to path without version if path with version does not exist
if (! schemaPath.exists())
schemaPath = new File(pathPrefix);
log.log(LogLevel.DEBUG, "Using schemas found in " + schemaPath);
copySchemas(schemaPath, tmpDir);
} else {
log.log(LogLevel.DEBUG, String.format("Saving schemas for model bundle %s:%s", bundle.getSymbolicName(), bundle
.getVersion()));
for (Enumeration<URL> entries = bundle.findEntries("schema", "*.rnc", true);
entries.hasMoreElements(); ) {
URL url = entries.nextElement();
writeContentsToFile(tmpDir, url.getFile(), url.openStream());
}
}
// TODO: When is this the case? Remove?
} else if ("file".equals(u.getProtocol())) {
File schemaPath = new File(u.getPath());
copySchemas(schemaPath, tmpDir);
}
}
return tmpDir;
}
private static void copySchemas(File from, File to) throws IOException {
if (! from.exists()) throw new IOException("Could not find schema source directory '" + from + "'");
if (! from.isDirectory()) throw new IOException("Schema source '" + from + "' is not a directory");
File sourceFile = new File(from, servicesXmlSchemaName);
if (! sourceFile.exists()) throw new IOException("Schema source file '" + sourceFile + "' not found");
IOUtils.copyDirectoryInto(from, to);
}
private static void writeContentsToFile(File outDir, String outFile, InputStream inputStream) throws IOException {
String contents = IOUtils.readAll(new InputStreamReader(inputStream));
File out = new File(outDir, outFile);
IOUtils.writeFile(out, contents, false);
}
private SchemaValidator createValidator(File schemaDir, String schemaFile) {
try {
File file = new File(schemaDir + File.separator + "schema" + File.separator + schemaFile);
return new SchemaValidator(file, new BaseDeployLogger());
} catch (SAXException e) {
throw new RuntimeException("Invalid schema '" + schemaFile + "'", e);
} catch (IOException e) {
throw new RuntimeException("IO error reading schema '" + schemaFile + "'", e);
}
}
}
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