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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.vespa.clustercontroller.apputil.communication.http;
import com.yahoo.container.jdisc.ThreadedHttpRequestHandler;
import com.yahoo.jdisc.HeaderFields;
import com.yahoo.jdisc.Response;
import com.yahoo.jdisc.handler.CompletionHandler;
import com.yahoo.text.Utf8;
import com.yahoo.vespa.clustercontroller.utils.communication.http.HttpRequest;
import com.yahoo.vespa.clustercontroller.utils.communication.http.HttpRequestHandler;
import com.yahoo.vespa.clustercontroller.utils.communication.http.HttpResult;
import java.io.*;
import java.nio.charset.StandardCharsets;
import java.time.Duration;
import java.util.logging.Logger;
/**
* Note. This class is tested through apache http instance test, using this as other endpoint.
*
* @author Haakon Humberset
* @author Harald Musum
* @author Vegard Sjonfjell
*/
public class JDiscHttpRequestHandler extends ThreadedHttpRequestHandler {
private static final Logger log = Logger.getLogger(JDiscHttpRequestHandler.class.getName());
private final HttpRequestHandler requestHandler;
public JDiscHttpRequestHandler(HttpRequestHandler handler, ThreadedHttpRequestHandler.Context parentCtx) {
super(parentCtx);
this.requestHandler = handler;
}
static class EmptyCompletionHandler implements CompletionHandler {
@Override
public void completed() { }
@Override
public void failed(Throwable throwable) { }
}
@Override
public com.yahoo.container.jdisc.HttpResponse handle(com.yahoo.container.jdisc.HttpRequest request) {
final HttpRequest legacyRequest = new HttpRequest();
final com.yahoo.jdisc.http.HttpRequest jDiscRequest = request.getJDiscRequest();
legacyRequest.setScheme(request.getUri().getScheme());
legacyRequest.setHost(request.getUri().getHost());
setOperation(legacyRequest, request.getMethod());
legacyRequest.setPort(request.getUri().getPort());
legacyRequest.setPath(request.getUri().getPath());
copyPostData(request, legacyRequest);
copyRequestHeaders(legacyRequest, jDiscRequest);
copyParameters(legacyRequest, jDiscRequest);
legacyRequest.setTimeout(Duration.ofMinutes(60).toMillis());
try {
final HttpResult result = requestHandler.handleRequest(legacyRequest);
log.fine("Got result " + result.toString(true));
return copyResponse(result);
} catch (Exception e) {
log.warning("Caught exception while handling request: " + e.getMessage());
return new com.yahoo.container.jdisc.HttpResponse(500) {
@Override
public void render(OutputStream outputStream) throws IOException {
outputStream.write(Utf8.toBytes(e.getMessage()));
}
};
}
}
static HttpRequest setOperation(HttpRequest request, com.yahoo.jdisc.http.HttpRequest.Method method) {
return switch (method) {
case GET -> request.setHttpOperation(HttpRequest.HttpOp.GET);
case POST -> request.setHttpOperation(HttpRequest.HttpOp.POST);
case PUT -> request.setHttpOperation(HttpRequest.HttpOp.PUT);
case DELETE -> request.setHttpOperation(HttpRequest.HttpOp.DELETE);
default -> throw new IllegalStateException("Unhandled method " + method);
};
}
private com.yahoo.container.jdisc.HttpResponse copyResponse(final HttpResult result) {
return new com.yahoo.container.jdisc.HttpResponse(result.getHttpReturnCode()) {
@Override
public void render(OutputStream outputStream) throws IOException {
outputStream.write(Utf8.toBytes(result.getContent().toString()));
}
@Override
public void complete(){
copyResponseHeaders(result, getJdiscResponse());
}
};
}
private void copyPostData(com.yahoo.container.jdisc.HttpRequest request, HttpRequest legacyRequest) {
try {
legacyRequest.setPostContent(new String(request.getData().readAllBytes(), StandardCharsets.UTF_8));
} catch (IOException e) {
throw new RuntimeException(e);
}
}
private static void copyParameters(HttpRequest legacyRequest, com.yahoo.jdisc.http.HttpRequest jDiscRequest) {
for (String key : jDiscRequest.parameters().keySet()) {
for (String value : jDiscRequest.parameters().get(key)) {
legacyRequest.addUrlOption(key, value);
}
}
}
private static void copyRequestHeaders(HttpRequest legacyRequest, com.yahoo.jdisc.http.HttpRequest jDiscRequest) {
for (String key : jDiscRequest.headers().keySet()) {
for (String value : jDiscRequest.headers().get(key)) {
legacyRequest.addHttpHeader(key, value);
}
}
}
private static HeaderFields copyResponseHeaders(HttpResult result, Response response) {
HeaderFields headers = new HeaderFields();
for (HttpRequest.KeyValuePair keyValuePair : result.getHeaders()) {
response.headers().put((keyValuePair.getKey()), keyValuePair.getValue());
}
return headers;
}
}
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