@Override
public void service(
@NotNull ServletRequest servletRequest, @NotNull ServletResponse servletResponse)
throws ServletException, IOException {
HttpServletRequest request = (HttpServletRequest) servletRequest;
HttpServletResponse response = (HttpServletResponse) servletResponse;
response.setContentType(TEXT_JSON);
if (!tokenValid(request)) {
response.setHeader("WWW-Authenticate", "X-Token realm=\"Foglight Usage\"");
Handler.sendError(response, HttpServletResponse.SC_UNAUTHORIZED, "Not authorized");
return;
}
String pathInfo = request.getPathInfo();
if (pathInfo == null) {
Handler.sendNotFound(response);
return;
}
String[] parts = StringUtils.split(pathInfo, '/');
int i = 0, n = parts.length;
List<String> ids = new ArrayList<>();
EndPoint endPoint = ROOT;
while (endPoint != null && i < n) {
endPoint = endPoint.getChild(parts[i], ids);
++i;
}
if (endPoint == null) {
Handler.sendNotFound(response);
return;
}
Handler handler = endPoint.getHandler(request.getMethod());
if (handler == null) {
response.setHeader("Allow", endPoint.getAllowed());
Handler.sendError(response, HttpServletResponse.SC_METHOD_NOT_ALLOWED, "Method not allowed");
return;
}
try (Connection db = DATA_SOURCE.getConnection()) {
handler.handle(request, response, db, ids);
} catch (SQLException e) {
LOG.warn("Error connecting to the database", e);
Handler.sendError(response, HttpServletResponse.SC_INTERNAL_SERVER_ERROR, e.getMessage());
}
}
private static void readEndpoint(
@NotNull XMLStreamReader reader, @NotNull EndPoint parent, @NotNull ClassLoader classLoader)
throws XMLStreamException {
reader.nextTag();
while (reader.isStartElement()) {
String localName = reader.getLocalName();
switch (localName) {
case "method":
{
String name = reader.getAttributeValue(null, "name");
String handler = reader.getAttributeValue(null, "handler");
try {
parent.addHandler(
name,
Class.forName(handler, false, classLoader)
.asSubclass(Handler.class)
.newInstance());
} catch (Exception e) {
LOG.warn("Error creating instance of " + handler, e);
}
reader.nextTag();
break;
}
case "endpoint":
{
String name = reader.getAttributeValue(null, "name");
EndPoint endPoint = new EndPoint();
readEndpoint(reader, endPoint, classLoader);
parent.addChild(name, endPoint);
break;
}
case "default":
{
EndPoint endPoint = new EndPoint();
readEndpoint(reader, endPoint, classLoader);
parent.setDefaultChild(endPoint);
break;
}
default:
throw new XMLStreamException("Unexpected element: " + localName, reader.getLocation());
}
reader.require(XMLStreamConstants.END_ELEMENT, null, localName);
reader.nextTag();
}
}
