io.netty.handler.codec.http.HttpResponseStatus # METHOD_NOT_ALLOWED 源码实例Demo

public static FullHttpResponse make(HttpResponseStatus status) {
    if (HttpResponseStatus.UNAUTHORIZED == status) {
        return NettyHttpResponse.make(HttpResponseStatus.UNAUTHORIZED, CONTENT_ERROR_401);
    }
    if (HttpResponseStatus.NOT_FOUND == status) {
        return NettyHttpResponse.make(HttpResponseStatus.NOT_FOUND, CONTENT_ERROR_404);
    }
    if (HttpResponseStatus.METHOD_NOT_ALLOWED == status) {
        return NettyHttpResponse.make(HttpResponseStatus.METHOD_NOT_ALLOWED, CONTENT_ERROR_405);
    }
    return NettyHttpResponse.make(HttpResponseStatus.OK,CONTENT_NORMAL_200);
}
 

private boolean directHandleMethod(ChannelHandlerContext ctx, FullHttpRequest request, HttpMethod method) {
	if (method.equals(HttpMethod.GET) || method.equals(HttpMethod.POST)) {
		return false;
	}
	// 处理 OPTIONS 请求
	HttpResponseStatus status = HttpResponseStatus.OK;
	boolean invalid = false;
	if (!method.equals(HttpMethod.OPTIONS)) {
		invalid = true;
		status = HttpResponseStatus.METHOD_NOT_ALLOWED;
	}
	DefaultFullHttpResponse response = new DefaultFullHttpResponse(HTTP_1_1, status, Unpooled.EMPTY_BUFFER);
	HttpHeaders headers = response.headers();
	// headers.set(HttpHeaderNames.ACCESS_CONTROL_ALLOW_HEADERS,
	// "X-Requested-With, accept, origin, content-type");
	headers.set(HttpHeaderNames.ACCESS_CONTROL_ALLOW_HEADERS, "X-Requested-With, content-type");
	headers.set(HttpHeaderNames.ACCESS_CONTROL_ALLOW_METHODS, "GET,POST,OPTIONS");
	headers.set(HttpHeaderNames.SERVER, "Netty5");
	if (invalid) {
		headers.set("Client-Warning", "Invalid Method");
	}
	boolean keepAlive = HttpHeaderUtil.isKeepAlive(request);
	if (keepAlive) {
		response.headers().set(HttpHeaderNames.CONNECTION, HttpHeaderValues.KEEP_ALIVE);
	}
	ctx.write(response);
	ChannelFuture future = ctx.writeAndFlush(LastHttpContent.EMPTY_LAST_CONTENT);
	if (!keepAlive) {
		future.addListener(ChannelFutureListener.CLOSE);
	}
	return true;
}
 

@Override
protected void decode(ChannelHandlerContext ctx, FullHttpRequest in, List<Object> out)
    throws Exception {
    switch (in.uri()) {
        case "/ping":
            if (in.method() == GET) {
                getPing(ctx, in, out);
                return;
            }

            throw new HttpException(HttpResponseStatus.METHOD_NOT_ALLOWED);
        case "/v1/batch":
            if (in.method() == POST) {
                if (matchContentType(in, "application/json")) {
                    postBatch(ctx, in, out);
                    return;
                }
                log.error("Unsupported Media Type");
                throw new HttpException(HttpResponseStatus.UNSUPPORTED_MEDIA_TYPE);
            }
            log.error("HTTP Method Not Allowed");
            throw new HttpException(HttpResponseStatus.METHOD_NOT_ALLOWED);
        default:
            /* do nothing */
            break;
    }

    throw new HttpException(HttpResponseStatus.NOT_FOUND);
}
 

public HttpResponseStatus getHttpStatus() {
    return HttpResponseStatus.METHOD_NOT_ALLOWED;
}
 

/**
 * Converts a {@link ResponseStatus} into a {@link HttpResponseStatus}.
 * @param responseStatus {@link ResponseStatus} that needs to be mapped to a {@link HttpResponseStatus}.
 * @return the {@link HttpResponseStatus} that maps to the {@link ResponseStatus}.
 */
private HttpResponseStatus getHttpResponseStatus(ResponseStatus responseStatus) {
  HttpResponseStatus status;
  switch (responseStatus) {
    case Ok:
      nettyMetrics.okCount.inc();
      status = HttpResponseStatus.OK;
      break;
    case Created:
      nettyMetrics.createdCount.inc();
      status = HttpResponseStatus.CREATED;
      break;
    case Accepted:
      nettyMetrics.acceptedCount.inc();
      status = HttpResponseStatus.ACCEPTED;
      break;
    case PartialContent:
      nettyMetrics.partialContentCount.inc();
      status = HttpResponseStatus.PARTIAL_CONTENT;
      break;
    case NotModified:
      nettyMetrics.notModifiedCount.inc();
      status = HttpResponseStatus.NOT_MODIFIED;
      break;
    case BadRequest:
      nettyMetrics.badRequestCount.inc();
      status = HttpResponseStatus.BAD_REQUEST;
      break;
    case Unauthorized:
      nettyMetrics.unauthorizedCount.inc();
      status = HttpResponseStatus.UNAUTHORIZED;
      break;
    case NotFound:
      nettyMetrics.notFoundCount.inc();
      status = HttpResponseStatus.NOT_FOUND;
      break;
    case Conflict:
      nettyMetrics.conflictCount.inc();
      status = HttpResponseStatus.CONFLICT;
      break;
    case Gone:
      nettyMetrics.goneCount.inc();
      status = HttpResponseStatus.GONE;
      break;
    case Forbidden:
      nettyMetrics.forbiddenCount.inc();
      status = HttpResponseStatus.FORBIDDEN;
      break;
    case ProxyAuthenticationRequired:
      nettyMetrics.proxyAuthRequiredCount.inc();
      status = HttpResponseStatus.PROXY_AUTHENTICATION_REQUIRED;
      break;
    case RangeNotSatisfiable:
      nettyMetrics.rangeNotSatisfiableCount.inc();
      status = HttpResponseStatus.REQUESTED_RANGE_NOT_SATISFIABLE;
      break;
    case TooManyRequests:
      nettyMetrics.tooManyRequests.inc();
      status = HttpResponseStatus.TOO_MANY_REQUESTS;
      break;
    case RequestTooLarge:
      nettyMetrics.requestTooLargeCount.inc();
      status = HttpResponseStatus.REQUEST_ENTITY_TOO_LARGE;
      break;
    case InternalServerError:
      nettyMetrics.internalServerErrorCount.inc();
      status = HttpResponseStatus.INTERNAL_SERVER_ERROR;
      break;
    case ServiceUnavailable:
      nettyMetrics.serviceUnavailableErrorCount.inc();
      status = HttpResponseStatus.SERVICE_UNAVAILABLE;
      break;
    case InsufficientCapacity:
      nettyMetrics.insufficientCapacityErrorCount.inc();
      status = HttpResponseStatus.INSUFFICIENT_STORAGE;
      break;
    case PreconditionFailed:
      nettyMetrics.preconditionFailedErrorCount.inc();
      status = HttpResponseStatus.PRECONDITION_FAILED;
      break;
    case MethodNotAllowed:
      nettyMetrics.methodNotAllowedErrorCount.inc();
      status = HttpResponseStatus.METHOD_NOT_ALLOWED;
      break;
    default:
      nettyMetrics.unknownResponseStatusCount.inc();
      status = HttpResponseStatus.INTERNAL_SERVER_ERROR;
      break;
  }
  return status;
}
 

/**
 * @param code the {@link RestServiceErrorCode} whose {@link HttpResponseStatus} equivalent is required.
 * @return the {@link HttpResponseStatus} equivalent of {@code code}.
 */
private HttpResponseStatus getExpectedHttpResponseStatus(RestServiceErrorCode code) {
  switch (code) {
    case RequestTooLarge:
      return HttpResponseStatus.REQUEST_ENTITY_TOO_LARGE;
    case Conflict:
      return HttpResponseStatus.CONFLICT;
    case Deleted:
      return HttpResponseStatus.GONE;
    case NotFound:
      return HttpResponseStatus.NOT_FOUND;
    case BadRequest:
    case InvalidArgs:
    case InvalidAccount:
    case InvalidContainer:
    case InvalidRequestState:
    case MalformedRequest:
    case MissingArgs:
    case UnsupportedHttpMethod:
      return HttpResponseStatus.BAD_REQUEST;
    case ResourceDirty:
    case AccessDenied:
      return HttpResponseStatus.FORBIDDEN;
    case Unauthorized:
      return HttpResponseStatus.UNAUTHORIZED;
    case ResourceScanInProgress:
      return HttpResponseStatus.PROXY_AUTHENTICATION_REQUIRED;
    case RangeNotSatisfiable:
      return HttpResponseStatus.REQUESTED_RANGE_NOT_SATISFIABLE;
    case ServiceUnavailable:
      return HttpResponseStatus.SERVICE_UNAVAILABLE;
    case TooManyRequests:
      return HttpResponseStatus.TOO_MANY_REQUESTS;
    case InsufficientCapacity:
      return HttpResponseStatus.INSUFFICIENT_STORAGE;
    case IdConverterServiceError:
    case InternalServerError:
    case RequestChannelClosed:
    case RequestResponseQueuingFailure:
    case UnsupportedRestMethod:
      return HttpResponseStatus.INTERNAL_SERVER_ERROR;
    case PreconditionFailed:
      return HttpResponseStatus.PRECONDITION_FAILED;
    case NotAllowed:
      return HttpResponseStatus.METHOD_NOT_ALLOWED;
    default:
      throw new IllegalArgumentException("Unrecognized RestServiceErrorCode - " + code);
  }
}