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// Copyright 2019 Oath Inc. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package ai.vespa.hosted.api;
import com.yahoo.config.provision.ApplicationId;
import com.yahoo.config.provision.ApplicationName;
import com.yahoo.config.provision.TenantName;
import com.yahoo.security.SslContextBuilder;
import com.yahoo.slime.Cursor;
import com.yahoo.slime.Inspector;
import com.yahoo.slime.JsonDecoder;
import com.yahoo.slime.JsonFormat;
import com.yahoo.slime.Slime;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.UncheckedIOException;
import java.net.URI;
import java.net.http.HttpClient;
import java.net.http.HttpRequest;
import java.net.http.HttpResponse;
import java.nio.file.Files;
import java.nio.file.Path;
import java.time.Duration;
import java.util.concurrent.Callable;
import java.util.function.Supplier;
import static ai.vespa.hosted.api.Method.POST;
import static java.net.http.HttpRequest.BodyPublishers.ofByteArray;
import static java.net.http.HttpRequest.BodyPublishers.ofInputStream;
import static java.net.http.HttpResponse.BodyHandlers.ofByteArray;
import static java.nio.charset.StandardCharsets.UTF_8;
/**
* Talks to a remote controller over HTTP. Subclasses are responsible for adding authentication to the requests.
*
* @author jonmv
*/
public abstract class ControllerHttpClient {
private final HttpClient client;
private final URI endpoint;
/** Creates an HTTP client against the given endpoint, using the given HTTP client builder to create a client. */
protected ControllerHttpClient(URI endpoint, HttpClient.Builder client) {
this.endpoint = endpoint.resolve("/");
this.client = client.connectTimeout(Duration.ofSeconds(5))
.version(HttpClient.Version.HTTP_1_1)
.build();
}
/** Creates an HTTP client against the given endpoint, which uses the given key to authenticate as the given application. */
public static ControllerHttpClient withSignatureKey(URI endpoint, Path privateKeyFile, ApplicationId id) {
return new SigningControllerHttpClient(endpoint, privateKeyFile, id);
}
/** Creates an HTTP client against the given endpoint, which uses the given private key and certificate of an Athenz identity. */
public static ControllerHttpClient withAthenzIdentity(URI endpoint, Path privateKeyFile, Path certificateFile) {
return new AthenzControllerHttpClient(endpoint, privateKeyFile, certificateFile);
}
/** Sends submission to the remote controller and returns the version of the accepted package, or throws if this fails. */
public String submit(Submission submission, TenantName tenant, ApplicationName application) {
return toMessage(send(request(HttpRequest.newBuilder(applicationPath(tenant, application).resolve("submit"))
.timeout(Duration.ofMinutes(30)),
POST,
new MultiPartStreamer().addJson("submitOptions", metaToJson(submission))
.addFile("applicationZip", submission.applicationZip())
.addFile("applicationTestZip", submission.applicationTestZip()))));
}
protected HttpRequest request(HttpRequest.Builder request, Method method, Supplier<InputStream> data) {
return request.method(method.name(), ofInputStream(data)).build();
}
private HttpRequest request(HttpRequest.Builder request, Method method) {
return request(request, method, InputStream::nullInputStream);
}
private HttpRequest request(HttpRequest.Builder request, Method method, byte[] data) {
return request(request, method, () -> new ByteArrayInputStream(data));
}
private HttpRequest request(HttpRequest.Builder request, Method method, MultiPartStreamer data) {
return request(request.setHeader("Content-Type", data.contentType()), method, data::data);
}
private URI apiPath() {
return concatenated(endpoint, "application", "v4");
}
private URI tenantPath(TenantName tenant) {
return concatenated(apiPath(), "tenant", tenant.value());
}
private URI applicationPath(TenantName tenant, ApplicationName application) {
return concatenated(tenantPath(tenant), "application", application.value());
}
private URI instancePath(ApplicationId id) {
return concatenated(applicationPath(id.tenant(), id.application()), "instance", id.instance().value());
}
private static URI concatenated(URI base, String... parts) {
return base.resolve(String.join("/", parts) + "/");
}
private HttpResponse<byte[]> send(HttpRequest request) {
return unchecked(() -> client.send(request, ofByteArray()));
}
private static <T> T unchecked(Callable<T> callable) {
try {
return callable.call();
}
catch (Exception e) {
throw new RuntimeException(e);
}
}
/** Returns a JSON representation of the submission meta data. */
private static String metaToJson(Submission submission) {
try {
Slime slime = new Slime();
Cursor rootObject = slime.setObject();
rootObject.setString("repository", submission.repository());
rootObject.setString("branch", submission.branch());
rootObject.setString("commit", submission.commit());
rootObject.setString("authorEmail", submission.authorEmail());
ByteArrayOutputStream buffer = new ByteArrayOutputStream();
new JsonFormat(true).encode(buffer, slime);
return buffer.toString(UTF_8);
}
catch (IOException e) {
throw new UncheckedIOException(e);
}
}
/** Returns the "message" element contained in the JSON formatted response, if 2XX status code, or throws otherwise. */
private static String toMessage(HttpResponse<byte[]> response) {
Inspector rootObject = toSlime(response.body()).get();
if (response.statusCode() / 100 == 2)
return rootObject.field("message").asString();
else {
throw new RuntimeException(response.request() + " returned code " + response.statusCode() +
" (" + rootObject.field("error-code").asString() + "): " +
rootObject.field("message").asString());
}
}
private static Slime toSlime(byte[] data) {
return new JsonDecoder().decode(new Slime(), data);
}
/** Client that signs requests with a private key whose public part is assigned to an application in the remote controller. */
private static class SigningControllerHttpClient extends ControllerHttpClient {
private final RequestSigner signer;
private SigningControllerHttpClient(URI endpoint, Path privateKeyFile, ApplicationId id) {
super(endpoint, HttpClient.newBuilder());
this.signer = new RequestSigner(unchecked(() -> Files.readString(privateKeyFile)), id.serializedForm());
}
@Override
protected HttpRequest request(HttpRequest.Builder request, Method method, Supplier<InputStream> data) {
return signer.signed(request, method, data);
}
}
/** Client that uses a given Athenz identity to authenticate to the remote controller. */
private static class AthenzControllerHttpClient extends ControllerHttpClient {
private AthenzControllerHttpClient(URI endpoint, Path privateKeyFile, Path certificateFile) {
super(endpoint,
HttpClient.newBuilder().sslContext(new SslContextBuilder().withKeyStore(privateKeyFile, certificateFile).build()));
}
}
}
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