diff options
Diffstat (limited to 'netconf/restconf/restconf-common/src/main/java/org/opendaylight/restconf/common/ErrorTags.java')
| -rw-r--r-- | netconf/restconf/restconf-common/src/main/java/org/opendaylight/restconf/common/ErrorTags.java | 99 |
1 files changed, 99 insertions, 0 deletions
diff --git a/netconf/restconf/restconf-common/src/main/java/org/opendaylight/restconf/common/ErrorTags.java b/netconf/restconf/restconf-common/src/main/java/org/opendaylight/restconf/common/ErrorTags.java new file mode 100644 index 0000000..952218a --- /dev/null +++ b/netconf/restconf/restconf-common/src/main/java/org/opendaylight/restconf/common/ErrorTags.java @@ -0,0 +1,99 @@ +/* + * Copyright (c) 2021 PANTHEON.tech, s.r.o. and others. All rights reserved. + * + * This program and the accompanying materials are made available under the + * terms of the Eclipse Public License v1.0 which accompanies this distribution, + * and is available at http://www.eclipse.org/legal/epl-v10.html + */ +package org.opendaylight.restconf.common; + +import static java.util.Objects.requireNonNull; + +import com.google.common.annotations.Beta; +import com.google.common.collect.ImmutableMap; +import javax.ws.rs.core.Response.Status; +import org.eclipse.jdt.annotation.NonNullByDefault; +import org.opendaylight.yangtools.yang.common.ErrorTag; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +/** + * {@link ErrorTag} mapping to HTTP errors. Aside from the mappings defined by + * <a href="https://datatracker.ietf.org/doc/html/rfc8040#section-7">RFC8040 section 7</a>, we also define tags which + * map to useful {@link Status} codes. + */ +@Beta +@NonNullByDefault +public final class ErrorTags { + /** + * Error reported when the request is valid, but the resource cannot be accessed. This tag typically maps to + * {@link Status#SERVICE_UNAVAILABLE}. + */ + // FIXME: redefine as SERVICE_UNAVAILABLE? It would be more obvious + public static final ErrorTag RESOURCE_DENIED_TRANSPORT = new ErrorTag("resource-denied-transport"); + + private static final Logger LOG = LoggerFactory.getLogger(ErrorTags.class); + private static final ImmutableMap<ErrorTag, Status> WELL_KNOWN_ERROR_TAGS = ImmutableMap.<ErrorTag, Status>builder() + .put(ErrorTag.IN_USE, Status.CONFLICT) + .put(ErrorTag.INVALID_VALUE, Status.BAD_REQUEST) + .put(ErrorTag.TOO_BIG, Status.REQUEST_ENTITY_TOO_LARGE) + .put(ErrorTag.MISSING_ATTRIBUTE, Status.BAD_REQUEST) + .put(ErrorTag.BAD_ATTRIBUTE, Status.BAD_REQUEST) + .put(ErrorTag.UNKNOWN_ATTRIBUTE, Status.BAD_REQUEST) + .put(ErrorTag.MISSING_ELEMENT, Status.BAD_REQUEST) + .put(ErrorTag.BAD_ELEMENT, Status.BAD_REQUEST) + .put(ErrorTag.UNKNOWN_ELEMENT, Status.BAD_REQUEST) + .put(ErrorTag.UNKNOWN_NAMESPACE, Status.BAD_REQUEST) + + .put(ErrorTag.ACCESS_DENIED, Status.FORBIDDEN) + .put(ErrorTag.LOCK_DENIED, Status.CONFLICT) + .put(ErrorTag.RESOURCE_DENIED, Status.CONFLICT) + .put(ErrorTag.ROLLBACK_FAILED, Status.INTERNAL_SERVER_ERROR) + .put(ErrorTag.DATA_EXISTS, Status.CONFLICT) + .put(ErrorTag.DATA_MISSING, dataMissingHttpStatus()) + + .put(ErrorTag.OPERATION_NOT_SUPPORTED, Status.NOT_IMPLEMENTED) + .put(ErrorTag.OPERATION_FAILED, Status.INTERNAL_SERVER_ERROR) + .put(ErrorTag.PARTIAL_OPERATION, Status.INTERNAL_SERVER_ERROR) + .put(ErrorTag.MALFORMED_MESSAGE, Status.BAD_REQUEST) + .put(ErrorTags.RESOURCE_DENIED_TRANSPORT, Status.SERVICE_UNAVAILABLE) + .build(); + + private ErrorTags() { + // Hidden on purpose + } + + /** + * Return the HTTP {@link Status} corresponding to specified {@link ErrorTag}. + * + * @param tag Error tag to map + * @return HTTP Status + * @throws NullPointerException if {@code tag} is null + */ + public static Status statusOf(final ErrorTag tag) { + final Status known = WELL_KNOWN_ERROR_TAGS.get(requireNonNull(tag)); + return known != null ? known : Status.INTERNAL_SERVER_ERROR; + } + + private static Status dataMissingHttpStatus() { + // Control over the HTTP status reported on "data-missing" conditions. This defaults to disabled, + // HTTP status 409 as specified by RFC8040 (and all previous drafts). See the discussion in: + // https://www.rfc-editor.org/errata/eid5565 + // https://mailarchive.ietf.org/arch/msg/netconf/hkVDdHK4xA74NgvXzWP0zObMiyY/ + final String propName = "org.opendaylight.restconf.eid5565"; + final String propValue = System.getProperty(propName, "disabled"); + switch (propValue) { + case "enabled": + // RFC7231 interpretation: 404 Not Found + LOG.info("RESTCONF data-missing condition is reported as HTTP status 404 (Errata 5565)"); + return Status.NOT_FOUND; + case "disabled": + break; + default: + LOG.warn("Unhandled {} value \"{}\", assuming disabled", propName, propValue); + } + + // RFC8040 specification: 409 Conflict + return Status.CONFLICT; + } +} |