public void service(HttpServletRequest req, HttpServletResponse resp)
throws IOException, ServletException {
String method = req.getMethod();
String path = req.getPathInfo();
String query = req.getQueryString();
ClassificationResult classification = processor.classifyRequest(method, path, query);
if (supportCors != Cors.NONE) {
addCorsHeaders(req, resp);
}
switch (classification.getStatus()) {
case INVALID_PATH:
sendError(resp, HttpServletResponse.SC_NOT_FOUND, "Invalid path " + path);
break;
case INVALID_METHOD:
resp.setHeader("Allow", makeAllowHeader(classification));
sendError(resp, HttpServletResponse.SC_METHOD_NOT_ALLOWED, "Method not allowed: " + method);
break;
case REQUIRED_QPS_MISSING:
sendError(
resp,
HttpServletResponse.SC_BAD_REQUEST,
"Required query parameters missing: " + classification.getMissingQueryParams());
break;
case INVALID_QP_VALUE:
sendError(resp, HttpServletResponse.SC_BAD_REQUEST, "Bad query parameter value");
break;
case EXTRA_QPS:
processRequest(classification, req, resp);
break;
case SUCCESSFUL:
if (req.getMethod().equalsIgnoreCase("OPTIONS")) {
resp.setHeader("Allow", makeAllowHeader(classification));
if (supportCors != Cors.NONE) {
addOptionsCorsHeaders(req, resp, classification);
}
} else {
processRequest(classification, req, resp);
}
break;
default:
throw new AssertionError();
}
}
