1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
|
// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.container.handler.metrics;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.node.ArrayNode;
import com.fasterxml.jackson.databind.node.ObjectNode;
import com.yahoo.container.jdisc.HttpRequest;
import com.yahoo.container.jdisc.HttpResponse;
import com.yahoo.container.jdisc.RequestView;
import com.yahoo.container.jdisc.ThreadedHttpRequestHandler;
import com.yahoo.container.jdisc.utils.CapabilityRequiringRequestHandler;
import com.yahoo.restapi.Path;
import com.yahoo.security.tls.Capability;
import java.net.URI;
import java.time.Duration;
import java.util.List;
import java.util.Optional;
import java.util.concurrent.Executor;
import static com.yahoo.jdisc.Response.Status.INTERNAL_SERVER_ERROR;
import static com.yahoo.jdisc.Response.Status.METHOD_NOT_ALLOWED;
import static com.yahoo.jdisc.Response.Status.NOT_FOUND;
import static com.yahoo.jdisc.Response.Status.OK;
import static com.yahoo.jdisc.http.HttpRequest.Method.GET;
import static java.util.logging.Level.WARNING;
/**
* @author gjoranv
*/
public abstract class HttpHandlerBase extends ThreadedHttpRequestHandler implements CapabilityRequiringRequestHandler {
private static final ObjectMapper jsonMapper = new ObjectMapper();
private final Duration defaultTimeout;
protected HttpHandlerBase(Executor executor) {
this(executor, Duration.ofSeconds(25));
}
protected HttpHandlerBase(Executor executor, Duration defaultTimeout) {
super(executor);
this.defaultTimeout = defaultTimeout;
}
protected abstract Optional<HttpResponse> doHandle(URI requestUri, Path apiPath, String consumer);
@Override public Capability requiredCapability(RequestView __) { return Capability.METRICSPROXY__METRICS_API; }
@Override
public Duration getTimeout() {
return defaultTimeout;
}
@Override
public final HttpResponse handle(HttpRequest request) {
if (request.getMethod() != GET) return new JsonResponse(METHOD_NOT_ALLOWED, "Only GET is supported");
Path path = new Path(request.getUri());
return doHandle(request.getUri(), path, getConsumer(request))
.orElse(new ErrorResponse(NOT_FOUND, "No content at given path"));
}
private String getConsumer(HttpRequest request) {
return request.getProperty("consumer");
}
protected JsonResponse resourceListResponse(URI requestUri, List<String> resources) {
try {
return new JsonResponse(OK, resourceList(requestUri, resources));
} catch (JsonProcessingException e) {
log.log(WARNING, "Bad JSON construction in generated resource list for " + requestUri.getPath(), e);
return new ErrorResponse(INTERNAL_SERVER_ERROR,
"An error occurred when generating the list of api resources.");
}
}
private static String resourceList(URI requestUri, List<String> resources) throws JsonProcessingException {
int port = requestUri.getPort();
String host = requestUri.getHost();
StringBuilder base = new StringBuilder("http://");
base.append(host);
if (port >= 0) {
base.append(":").append(port);
}
String uriBase = base.toString();
ArrayNode linkList = jsonMapper.createArrayNode();
for (String api : resources) {
ObjectNode resource = jsonMapper.createObjectNode();
resource.put("url", uriBase + api);
linkList.add(resource);
}
return jsonMapper.writerWithDefaultPrettyPrinter()
.writeValueAsString(jsonMapper.createObjectNode().set("resources", linkList));
}
}
|
