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package org.aoju.bus.gitlab.hooks;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.node.ObjectNode;
import org.aoju.bus.gitlab.GitLabApiException;
import org.aoju.bus.gitlab.HookManager;
import org.aoju.bus.gitlab.support.HttpRequest;
import org.aoju.bus.gitlab.support.JacksonJson;
import javax.servlet.http.HttpServletRequest;
import java.io.InputStreamReader;
import java.util.List;
import java.util.concurrent.CopyOnWriteArrayList;
import java.util.logging.Level;
import java.util.logging.Logger;
/**
* This class provides a handler for processing GitLab System Hook callouts.
*/
public class SystemHookManager implements HookManager {
public static final String SYSTEM_HOOK_EVENT = "System Hook";
private final static Logger LOGGER = Logger.getLogger(SystemHookManager.class.getName());
private final JacksonJson jacksonJson = new JacksonJson();
// Collection of objects listening for System Hook events.
private final List systemHookListeners = new CopyOnWriteArrayList();
private String secretToken;
/**
* Create a HookManager to handle GitLab system hook events.
*/
public SystemHookManager() {
}
/**
* Create a HookManager to handle GitLab system hook events which will be verified
* against the specified secretToken.
*
* @param secretToken the secret token to verify against
*/
public SystemHookManager(String secretToken) {
this.secretToken = secretToken;
}
/**
* Get the secret token that received hook events should be validated against.
*
* @return the secret token that received hook events should be validated against
*/
public String getSecretToken() {
return (secretToken);
}
/**
* Set the secret token that received hook events should be validated against.
*
* @param secretToken the secret token to verify against
*/
public void setSecretToken(String secretToken) {
this.secretToken = secretToken;
}
/**
* Parses and verifies an SystemHookEvent instance from the HTTP request and
* fires it off to the registered listeners.
*
* @param request the HttpServletRequest to read the Event instance from
* @throws GitLabApiException if the parsed event is not supported
*/
public void handleEvent(HttpServletRequest request) throws GitLabApiException {
handleRequest(request);
}
/**
* Parses and verifies an SystemHookEvent instance from the HTTP request and
* fires it off to the registered listeners.
*
* @param request the HttpServletRequest to read the Event instance from
* @return the processed SystemHookEvent instance read from the request,null if the request
* not contain a system hook event
* @throws GitLabApiException if the parsed event is not supported
*/
public SystemHookEvent handleRequest(HttpServletRequest request) throws GitLabApiException {
String eventName = request.getHeader("X-Gitlab-Event");
if (eventName == null || eventName.trim().isEmpty()) {
String message = "X-Gitlab-Event header is missing!";
LOGGER.warning(message);
return (null);
}
if (!isValidSecretToken(request)) {
String message = "X-Gitlab-Token mismatch!";
LOGGER.warning(message);
throw new GitLabApiException(message);
}
LOGGER.info("handleEvent: X-Gitlab-Event=" + eventName);
if (!SYSTEM_HOOK_EVENT.equals(eventName)) {
String message = "Unsupported X-Gitlab-Event, event Name=" + eventName;
LOGGER.warning(message);
throw new GitLabApiException(message);
}
// Get the JSON as a JsonNode tree. We do not directly unmarshal the input as special handling must
// be done for "merge_request" events.
JsonNode tree;
try {
if (LOGGER.isLoggable(Level.FINE)) {
LOGGER.fine(HttpRequest.getShortRequestDump("System Hook", true, request));
String postData = HttpRequest.getPostDataAsString(request);
LOGGER.fine("Raw POST data:\n" + postData);
tree = jacksonJson.readTree(postData);
} else {
InputStreamReader reader = new InputStreamReader(request.getInputStream());
tree = jacksonJson.readTree(reader);
}
} catch (Exception e) {
LOGGER.warning("Error reading JSON data, exception=" +
e.getClass().getSimpleName() + ", error=" + e.getMessage());
throw new GitLabApiException(e);
}
// NOTE: This is a hack based on the GitLab documentation and actual content of the "merge_request" event
// showing that the "event_name" property is missing from the merge_request system hook event. The hack is
// to inject the "event_name" node so that the polymorphic deserialization of a SystemHookEvent works correctly
// when the system hook event is a "merge_request" event.
if (!tree.has("event_name") && tree.has("object_kind")) {
String objectKind = tree.get("object_kind").asText();
if (MergeRequestSystemHookEvent.MERGE_REQUEST_EVENT.equals(objectKind)) {
ObjectNode node = (ObjectNode) tree;
node.put("event_name", MergeRequestSystemHookEvent.MERGE_REQUEST_EVENT);
} else {
String message = "Unsupported object_kind for system hook event, object_kind=" + objectKind;
LOGGER.warning(message);
throw new GitLabApiException(message);
}
}
// Unmarshal the tree to a concrete instance of a SystemHookEvent and fire the event to any listeners
SystemHookEvent event;
try {
event = jacksonJson.unmarshal(SystemHookEvent.class, tree);
if (LOGGER.isLoggable(Level.FINE)) {
LOGGER.fine(event.getEventName() + "\n" + jacksonJson.marshal(event) + "\n");
}
StringBuffer requestUrl = request.getRequestURL();
event.setRequestUrl(requestUrl != null ? requestUrl.toString() : null);
event.setRequestQueryString(request.getQueryString());
String secretToken = request.getHeader("X-Gitlab-Token");
event.setRequestSecretToken(secretToken);
} catch (Exception e) {
LOGGER.warning(String.format("Error processing JSON data, exception=%s, error=%s",
e.getClass().getSimpleName(), e.getMessage()));
throw new GitLabApiException(e);
}
try {
fireEvent(event);
return (event);
} catch (Exception e) {
LOGGER.warning(String.format("Error processing event, exception=%s, error=%s",
e.getClass().getSimpleName(), e.getMessage()));
throw new GitLabApiException(e);
}
}
/**
* Verifies the provided Event and fires it off to the registered listeners.
*
* @param event the Event instance to handle
* @throws GitLabApiException if the event is not supported
*/
public void handleEvent(SystemHookEvent event) throws GitLabApiException {
if (event != null) {
LOGGER.info("handleEvent:" + event.getClass().getSimpleName() + ", eventName=" + event.getEventName());
fireEvent(event);
} else {
LOGGER.warning("handleEvent: provided event cannot be null!");
}
}
/**
* Adds a System Hook event listener.
*
* @param listener the SystemHookListener to add
*/
public void addListener(SystemHookListener listener) {
if (!systemHookListeners.contains(listener)) {
systemHookListeners.add(listener);
}
}
/**
* Removes a System Hook event listener.
*
* @param listener the SystemHookListener to remove
*/
public void removeListener(SystemHookListener listener) {
systemHookListeners.remove(listener);
}
/**
* Fire the event to the registered listeners.
*
* @param event the SystemHookEvent instance to fire to the registered event listeners
* @throws GitLabApiException if the event is not supported
*/
public void fireEvent(SystemHookEvent event) throws GitLabApiException {
if (event instanceof ProjectSystemHookEvent) {
fireProjectEvent((ProjectSystemHookEvent) event);
} else if (event instanceof TeamMemberSystemHookEvent) {
fireTeamMemberEvent((TeamMemberSystemHookEvent) event);
} else if (event instanceof UserSystemHookEvent) {
fireUserEvent((UserSystemHookEvent) event);
} else if (event instanceof KeySystemHookEvent) {
fireKeyEvent((KeySystemHookEvent) event);
} else if (event instanceof GroupSystemHookEvent) {
fireGroupEvent((GroupSystemHookEvent) event);
} else if (event instanceof GroupMemberSystemHookEvent) {
fireGroupMemberEvent((GroupMemberSystemHookEvent) event);
} else if (event instanceof PushSystemHookEvent) {
firePushEvent((PushSystemHookEvent) event);
} else if (event instanceof TagPushSystemHookEvent) {
fireTagPushEvent((TagPushSystemHookEvent) event);
} else if (event instanceof RepositorySystemHookEvent) {
fireRepositoryEvent((RepositorySystemHookEvent) event);
} else if (event instanceof MergeRequestSystemHookEvent) {
fireMergeRequestEvent((MergeRequestSystemHookEvent) event);
} else {
String message = "Unsupported event, event_named=" + event.getEventName();
LOGGER.warning(message);
throw new GitLabApiException(message);
}
}
protected void fireProjectEvent(ProjectSystemHookEvent event) {
for (SystemHookListener listener : systemHookListeners) {
listener.onProjectEvent(event);
}
}
protected void fireTeamMemberEvent(TeamMemberSystemHookEvent event) {
for (SystemHookListener listener : systemHookListeners) {
listener.onTeamMemberEvent(event);
}
}
protected void fireUserEvent(UserSystemHookEvent event) {
for (SystemHookListener listener : systemHookListeners) {
listener.onUserEvent(event);
}
}
protected void fireKeyEvent(KeySystemHookEvent event) {
for (SystemHookListener listener : systemHookListeners) {
listener.onKeyEvent(event);
}
}
protected void fireGroupEvent(GroupSystemHookEvent event) {
for (SystemHookListener listener : systemHookListeners) {
listener.onGroupEvent(event);
}
}
protected void fireGroupMemberEvent(GroupMemberSystemHookEvent event) {
for (SystemHookListener listener : systemHookListeners) {
listener.onGroupMemberEvent(event);
}
}
protected void firePushEvent(PushSystemHookEvent event) {
for (SystemHookListener listener : systemHookListeners) {
listener.onPushEvent(event);
}
}
protected void fireTagPushEvent(TagPushSystemHookEvent event) {
for (SystemHookListener listener : systemHookListeners) {
listener.onTagPushEvent(event);
}
}
protected void fireRepositoryEvent(RepositorySystemHookEvent event) {
for (SystemHookListener listener : systemHookListeners) {
listener.onRepositoryEvent(event);
}
}
protected void fireMergeRequestEvent(MergeRequestSystemHookEvent event) {
for (SystemHookListener listener : systemHookListeners) {
listener.onMergeRequestEvent(event);
}
}
}
