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   1 /**
   2  * Copyright (c) 2010-2020 Contributors to the openHAB project
   3  *
   4  * See the NOTICE file(s) distributed with this work for additional
   5  * information.
   6  *
   7  * This program and the accompanying materials are made available under the
   8  * terms of the Eclipse Public License 2.0 which is available at
   9  * http://www.eclipse.org/legal/epl-2.0
  10  *
  11  * SPDX-License-Identifier: EPL-2.0
  12  */
  13 package org.openhab.binding.http.internal.http;
  14
  15 import java.nio.charset.StandardCharsets;
  16 import java.util.concurrent.CompletableFuture;
  17 import java.util.stream.Collectors;
  18
  19 import org.eclipse.jdt.annotation.NonNullByDefault;
  20 import org.eclipse.jdt.annotation.Nullable;
  21 import org.eclipse.jetty.client.api.Request;
  22 import org.eclipse.jetty.client.api.Response;
  23 import org.eclipse.jetty.client.api.Result;
  24 import org.eclipse.jetty.client.util.BufferingResponseListener;
  25 import org.eclipse.jetty.http.HttpField;
  26 import org.eclipse.jetty.http.HttpStatus;
  27 import org.slf4j.Logger;
  28 import org.slf4j.LoggerFactory;
  29
  30 /**
  31  * The {@link HttpResponseListener} is responsible for processing the result of a HTTP request
  32  *
  33  * @author Jan N. Klug - Initial contribution
  34  */
  35 @NonNullByDefault
  36 public class HttpResponseListener extends BufferingResponseListener {
  37     private final Logger logger = LoggerFactory.getLogger(HttpResponseListener.class);
  38     private final CompletableFuture<@Nullable Content> future;
  39     private final String fallbackEncoding;
  40
  41     public HttpResponseListener(CompletableFuture<@Nullable Content> future) {
  42         this(future, null);
  43     }
  44
  45     public HttpResponseListener(CompletableFuture<@Nullable Content> future, @Nullable String fallbackEncoding) {
  46         this.future = future;
  47         this.fallbackEncoding = fallbackEncoding != null ? fallbackEncoding : StandardCharsets.UTF_8.name();
  48     }
  49
  50     @Override
  51     public void onComplete(@NonNullByDefault({}) Result result) {
  52         Response response = result.getResponse();
  53         if (logger.isTraceEnabled()) {
  54             logger.trace("Received from '{}': {}", result.getRequest().getURI(), responseToLogString(response));
  55         }
  56         Request request = result.getRequest();
  57         if (result.isFailed()) {
  58             logger.warn("Requesting '{}' (method='{}', content='{}') failed: {}", request.getURI(), request.getMethod(),
  59                     request.getContent(), result.getFailure().getMessage());
  60             future.complete(null);
  61         } else {
  62             switch (response.getStatus()) {
  63                 case HttpStatus.OK_200:
  64                     byte[] content = getContent();
  65                     String encoding = getEncoding();
  66                     if (content != null) {
  67                         future.complete(
  68                                 new Content(content, encoding == null ? fallbackEncoding : encoding, getMediaType()));
  69                     } else {
  70                         future.complete(null);
  71                     }
  72                     break;
  73                 case HttpStatus.UNAUTHORIZED_401:
  74                     logger.debug("Requesting '{}' (method='{}', content='{}') failed: Authorization error",
  75                             request.getURI(), request.getMethod(), request.getContent());
  76                     future.completeExceptionally(new HttpAuthException());
  77                     break;
  78                 default:
  79                     logger.warn("Requesting '{}' (method='{}', content='{}') failed: {} {}", request.getURI(),
  80                             request.getMethod(), request.getContent(), response.getStatus(), response.getReason());
  81                     future.completeExceptionally(new IllegalStateException("Response - Code" + response.getStatus()));
  82             }
  83         }
  84     }
  85
  86     private String responseToLogString(Response response) {
  87         String logString = "Code = {" + response.getStatus() + "}, Headers = {"
  88                 + response.getHeaders().stream().map(HttpField::toString).collect(Collectors.joining(", "))
  89                 + "}, Content = {" + getContentAsString() + "}";
  90         return logString;
  91     }
  92 }