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   1 /**
   2  * Copyright (c) 2010-2023 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.Objects;
  17 import java.util.concurrent.CompletableFuture;
  18 import java.util.stream.Collectors;
  19
  20 import org.eclipse.jdt.annotation.NonNullByDefault;
  21 import org.eclipse.jdt.annotation.Nullable;
  22 import org.eclipse.jetty.client.api.Request;
  23 import org.eclipse.jetty.client.api.Response;
  24 import org.eclipse.jetty.client.api.Result;
  25 import org.eclipse.jetty.client.util.BufferingResponseListener;
  26 import org.eclipse.jetty.http.HttpField;
  27 import org.eclipse.jetty.http.HttpStatus;
  28 import org.slf4j.Logger;
  29 import org.slf4j.LoggerFactory;
  30
  31 /**
  32  * The {@link HttpResponseListener} is responsible for processing the result of a HTTP request
  33  *
  34  * @author Jan N. Klug - Initial contribution
  35  */
  36 @NonNullByDefault
  37 public class HttpResponseListener extends BufferingResponseListener {
  38     private final Logger logger = LoggerFactory.getLogger(HttpResponseListener.class);
  39     private final CompletableFuture<@Nullable Content> future;
  40     private final String fallbackEncoding;
  41
  42     /**
  43      * the HttpResponseListener is responsible
  44      *
  45      * @param future Content future to complete with the result of the request
  46      * @param fallbackEncoding a fallback encoding for the content (UTF-8 if null)
  47      * @param bufferSize the buffer size for the content in kB (default 2048 kB)
  48      */
  49     public HttpResponseListener(CompletableFuture<@Nullable Content> future, @Nullable String fallbackEncoding,
  50             int bufferSize) {
  51         super(bufferSize * 1024);
  52         this.future = future;
  53         this.fallbackEncoding = fallbackEncoding != null ? fallbackEncoding : StandardCharsets.UTF_8.name();
  54     }
  55
  56     @Override
  57     public void onComplete(@NonNullByDefault({}) Result result) {
  58         Response response = result.getResponse();
  59         if (logger.isTraceEnabled()) {
  60             logger.trace("Received from '{}': {}", result.getRequest().getURI(), responseToLogString(response));
  61         }
  62         Request request = result.getRequest();
  63         if (result.isFailed()) {
  64             logger.warn("Requesting '{}' (method='{}', content='{}') failed: {}", request.getURI(), request.getMethod(),
  65                     request.getContent(), result.getFailure().toString());
  66             future.complete(null);
  67         } else if (HttpStatus.isSuccess(response.getStatus())) {
  68             String encoding = Objects.requireNonNullElse(getEncoding(), fallbackEncoding);
  69             future.complete(new Content(getContent(), encoding, getMediaType()));
  70         } else {
  71             switch (response.getStatus()) {
  72                 case HttpStatus.UNAUTHORIZED_401:
  73                     logger.debug("Requesting '{}' (method='{}', content='{}') failed: Authorization error",
  74                             request.getURI(), request.getMethod(), request.getContent());
  75                     future.completeExceptionally(new HttpAuthException());
  76                     break;
  77                 default:
  78                     logger.warn("Requesting '{}' (method='{}', content='{}') failed: {} {}", request.getURI(),
  79                             request.getMethod(), request.getContent(), response.getStatus(), response.getReason());
  80                     future.completeExceptionally(new IllegalStateException("Response - Code" + response.getStatus()));
  81             }
  82         }
  83     }
  84
  85     private String responseToLogString(Response response) {
  86         String logString = "Code = {" + response.getStatus() + "}, Headers = {"
  87                 + response.getHeaders().stream().map(HttpField::toString).collect(Collectors.joining(", "))
  88                 + "}, Content = {" + getContentAsString() + "}";
  89         return logString;
  90     }
  91 }