<div class="col-sm-9">
                                        <input type="file" id="kuromojiFile" name="kuromojiFile" class="form-control-file"/>
                                    </div>
                                </div>
                            </div>
                            <div class="card-footer">

                                    <div class="col-sm-9">
                                        <input type="file" id="charMappingFile" name="charMappingFile" class="form-control-file"/>
                                    </div>
                                </div>
                            </div>
                            <div class="card-footer">

                                    <div class="col-sm-9">
                                        <input type="file" id="stopwordsFile" name="stopwordsFile" class="form-control-file"/>
                                    </div>
                                </div>
                            </div>
                            <div class="card-footer">

/**
 * This annotation will mark your class as a Mojo, which is the implementation of a goal in a Maven plugin.
 * <p>
 * The mojo can be annotated with {@code org.apache.maven.api.di.*} annotations to
 * control the lifecycle of the mojo itself, and to inject other beans.
 * </p>
 * <p>
 * The mojo class can also be injected with an {@link Execute} annotation to specify a
 * forked lifecycle.
 * </p>
 * <p>

    // ===================================================================================
    //                                                                    Control Override
    //                                                                    ================
    @Override
    public String asTableDbName() {
        return asEsIndexType();
    }

    @Override

    // ===================================================================================
    //                                                                    Control Override
    //                                                                    ================
    @Override
    public String asTableDbName() {
        return asEsIndexType();
    }

    @Override

    // ===================================================================================
    //                                                                    Control Override
    //                                                                    ================
    @Override
    public String asTableDbName() {
        return asEsIndexType();
    }

    @Override

    // ===================================================================================
    //                                                                    Control Override
    //                                                                    ================
    @Override
    public String asTableDbName() {
        return asEsIndexType();
    }

    @Override

            }
        }

        @Override
        protected boolean doDisconnect(boolean hard, boolean inUse) throws IOException {
            return disconnectResult;
        }

        // Test control methods
        public void setState(int state) {
            this.state = state;
        }

        public void setPeekedKey(Long key) {
            this.peekedKey = key;
        }

The middleware responds to two particular types of HTTP request...

### CORS preflight requests { #cors-preflight-requests }

These are any `OPTIONS` request with `Origin` and `Access-Control-Request-Method` headers.

In this case the middleware will intercept the incoming request and respond with appropriate CORS headers, and either a `200` or `400` response for informational purposes.