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// Copyright Verizon Media. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package ai.vespa.feed.client;
import org.apache.commons.cli.CommandLine;
import org.apache.commons.cli.CommandLineParser;
import org.apache.commons.cli.DefaultParser;
import org.apache.commons.cli.HelpFormatter;
import org.apache.commons.cli.Option;
import org.apache.commons.cli.Options;
import org.apache.commons.cli.ParseException;
import java.io.File;
import java.io.OutputStream;
import java.io.PrintWriter;
import java.net.URI;
import java.net.URISyntaxException;
import java.net.URL;
import java.nio.file.Path;
import java.util.Collections;
import java.util.HashMap;
import java.util.Map;
import java.util.Optional;
import java.util.OptionalInt;
/**
* Parses command line arguments
*
* @author bjorncs
*/
class CliArguments {
private static final Options optionsDefinition = createOptions();
private static final String HELP_OPTION = "help";
private static final String VERSION_OPTION = "version";
private static final String ENDPOINT_OPTION = "endpoint";
private static final String FILE_OPTION = "file";
private static final String CONNECTIONS_OPTION = "connections";
private static final String MAX_STREAMS_PER_CONNECTION = "max-streams-per-connection";
private static final String CERTIFICATE_OPTION = "certificate";
private static final String PRIVATE_KEY_OPTION = "private-key";
private static final String CA_CERTIFICATES_OPTION = "ca-certificates";
private static final String DISABLE_SSL_HOSTNAME_VERIFICATION_OPTION = "disable-ssl-hostname-verification";
private static final String HEADER_OPTION = "header";
private final CommandLine arguments;
private CliArguments(CommandLine arguments) {
this.arguments = arguments;
}
static CliArguments fromRawArgs(String[] rawArgs) throws CliArgumentsException {
CommandLineParser parser = new DefaultParser();
try {
return new CliArguments(parser.parse(optionsDefinition, rawArgs));
} catch (ParseException e) {
throw new CliArgumentsException(e);
}
}
URI endpoint() throws CliArgumentsException {
try {
URL url = (URL) arguments.getParsedOptionValue(ENDPOINT_OPTION);
if (url == null) throw new CliArgumentsException("Endpoint must be specified");
return url.toURI();
} catch (ParseException | URISyntaxException e) {
throw new CliArgumentsException("Invalid endpoint: " + e.getMessage(), e);
}
}
boolean helpSpecified() { return has(HELP_OPTION); }
boolean versionSpecified() { return has(VERSION_OPTION); }
OptionalInt connections() throws CliArgumentsException { return intValue(CONNECTIONS_OPTION); }
OptionalInt maxStreamsPerConnection() throws CliArgumentsException { return intValue(MAX_STREAMS_PER_CONNECTION); }
Optional<CertificateAndKey> certificateAndKey() throws CliArgumentsException {
Path certificateFile = fileValue(CERTIFICATE_OPTION).orElse(null);
Path privateKeyFile = fileValue(PRIVATE_KEY_OPTION).orElse(null);
if ((certificateFile == null) != (privateKeyFile == null)) {
throw new CliArgumentsException(String.format("Both '%s' and '%s' must be specified together", CERTIFICATE_OPTION, PRIVATE_KEY_OPTION));
}
if (privateKeyFile == null && certificateFile == null) return Optional.empty();
return Optional.of(new CertificateAndKey(certificateFile, privateKeyFile));
}
Optional<Path> caCertificates() throws CliArgumentsException { return fileValue(CA_CERTIFICATES_OPTION); }
Path inputFile() throws CliArgumentsException {
return fileValue(FILE_OPTION)
.orElseThrow(() -> new CliArgumentsException("Feed file must be specified"));
}
Map<String, String> headers() throws CliArgumentsException {
String[] rawArguments = arguments.getOptionValues(HEADER_OPTION);
if (rawArguments == null) return Collections.emptyMap();
Map<String, String> headers = new HashMap<>();
for (String rawArgument : rawArguments) {
if (rawArgument.startsWith("\"") || rawArgument.startsWith("'")) {
rawArgument = rawArgument.substring(1);
}
if (rawArgument.endsWith("\"") || rawArgument.endsWith("'")) {
rawArgument = rawArgument.substring(0, rawArgument.length() - 1);
}
int colonIndex = rawArgument.indexOf(':');
if (colonIndex == -1) throw new CliArgumentsException("Invalid header: '" + rawArgument + "'");
headers.put(rawArgument.substring(0, colonIndex), rawArgument.substring(colonIndex + 1).trim());
}
return Collections.unmodifiableMap(headers);
}
boolean sslHostnameVerificationDisabled() { return has(DISABLE_SSL_HOSTNAME_VERIFICATION_OPTION); }
private OptionalInt intValue(String option) throws CliArgumentsException {
try {
Number number = (Number) arguments.getParsedOptionValue(option);
return number != null ? OptionalInt.of(number.intValue()) : OptionalInt.empty();
} catch (ParseException e) {
throw new CliArgumentsException(String.format("Invalid value for '%s': %s", option, e.getMessage()), e);
}
}
private Optional<Path> fileValue(String option) throws CliArgumentsException {
try {
File certificateFile = (File) arguments.getParsedOptionValue(option);
if (certificateFile == null) return Optional.empty();
return Optional.of(certificateFile.toPath());
} catch (ParseException e) {
throw new CliArgumentsException(String.format("Invalid value for '%s': %s", option, e.getMessage()), e);
}
}
private boolean has(String option) { return arguments.hasOption(option); }
private static Options createOptions() {
return new Options()
.addOption(Option.builder()
.longOpt(HELP_OPTION)
.build())
.addOption(Option.builder()
.longOpt(VERSION_OPTION)
.build())
.addOption(Option.builder()
.longOpt(ENDPOINT_OPTION)
.hasArg()
.type(URL.class)
.build())
.addOption(Option.builder()
.longOpt(HEADER_OPTION)
.hasArgs()
.build())
.addOption(Option.builder()
.longOpt(FILE_OPTION)
.type(File.class)
.hasArg()
.build())
.addOption(Option.builder()
.longOpt(CONNECTIONS_OPTION)
.hasArg()
.type(Number.class)
.build())
.addOption(Option.builder()
.longOpt(MAX_STREAMS_PER_CONNECTION)
.hasArg()
.type(Number.class)
.build())
.addOption(Option.builder()
.longOpt(CONNECTIONS_OPTION)
.hasArg()
.type(Number.class)
.build())
.addOption(Option.builder()
.longOpt(CERTIFICATE_OPTION)
.type(File.class)
.hasArg()
.build())
.addOption(Option.builder()
.longOpt(PRIVATE_KEY_OPTION)
.type(File.class)
.hasArg()
.build())
.addOption(Option.builder()
.longOpt(CA_CERTIFICATES_OPTION)
.type(File.class)
.hasArg()
.build())
.addOption(Option.builder()
.longOpt(DISABLE_SSL_HOSTNAME_VERIFICATION_OPTION)
.build());
}
void printHelp(OutputStream out) {
HelpFormatter formatter = new HelpFormatter();
PrintWriter writer = new PrintWriter(out);
formatter.printHelp(
writer,
formatter.getWidth(),
"vespa-feed-client <options>",
"Vespa feed client",
optionsDefinition,
formatter.getLeftPadding(),
formatter.getDescPadding(),
"");
writer.flush();
}
static class CliArgumentsException extends Exception {
CliArgumentsException(String message, Throwable cause) { super(message, cause); }
CliArgumentsException(Throwable cause) { super(cause.getMessage(), cause); }
CliArgumentsException(String message) { super(message); }
}
static class CertificateAndKey {
final Path certificateFile;
final Path privateKeyFile;
CertificateAndKey(Path certificateFile, Path privateKeyFile) {
this.certificateFile = certificateFile;
this.privateKeyFile = privateKeyFile;
}
}
}
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