Method convertResponse

core/src/main/java/feign/DefaultClient.java:94–135

(HttpURLConnection connection, Request request)

  }

  Response convertResponse(HttpURLConnection connection, Request request) throws IOException {
    int status = connection.getResponseCode();
    String reason = connection.getResponseMessage();

    if (status < 0) {
      throw new IOException(
          format(
              "Invalid status(%s) executing %s %s",
              status, connection.getRequestMethod(), connection.getURL()));
    }

    Map<String, Collection<String>> headers = new TreeMap<>(CASE_INSENSITIVE_ORDER);
    for (Map.Entry<String, List<String>> field : connection.getHeaderFields().entrySet()) {
      // response message
      if (field.getKey() != null) {
        headers.put(field.getKey(), field.getValue());
      }
    }

    Integer length = connection.getContentLength();
    if (length == -1) {
      length = null;
    }
    InputStream stream;
    if (status >= 400) {
      stream = connection.getErrorStream();
    } else {
      stream = connection.getInputStream();
    }
    if (stream != null && this.isGzip(headers.get(CONTENT_ENCODING))) {
      stream = new GZIPInputStream(stream);
    } else if (stream != null && this.isDeflate(headers.get(CONTENT_ENCODING))) {
      stream = new InflaterInputStream(stream);
    }
    return Response.builder()
        .status(status)
        .reason(reason)
        .headers(headers)
        .request(request)
        .body(stream, length)
        .build();
  }

  public HttpURLConnection getConnection(final URL url) throws IOException {
    return (HttpURLConnection) url.openConnection();