org.springframework.http.server.reactive.ServletServerHttpResponse.java Source code

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Here is the source code for org.springframework.http.server.reactive.ServletServerHttpResponse.java

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/*
 * Copyright 2002-2016 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.springframework.http.server.reactive;

import java.nio.charset.Charset;
import java.util.List;
import java.util.Map;
import java.util.function.Function;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletResponse;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.reactivestreams.Publisher;
import reactor.core.publisher.Mono;

import org.springframework.core.io.buffer.DataBuffer;
import org.springframework.core.io.buffer.DataBufferFactory;
import org.springframework.http.HttpStatus;
import org.springframework.http.MediaType;
import org.springframework.http.ResponseCookie;
import org.springframework.util.Assert;

/**
 * Adapt {@link ServerHttpResponse} to the Servlet {@link HttpServletResponse}.
 *
 * @author Rossen Stoyanchev
 */
public class ServletServerHttpResponse extends AbstractServerHttpResponse {

    private static final Log logger = LogFactory.getLog(ServletServerHttpResponse.class);

    private final HttpServletResponse response;

    private final Function<Publisher<DataBuffer>, Mono<Void>> responseBodyWriter;

    public ServletServerHttpResponse(HttpServletResponse response, DataBufferFactory dataBufferFactory,
            Function<Publisher<DataBuffer>, Mono<Void>> responseBodyWriter) {
        super(dataBufferFactory);
        Assert.notNull(response, "'response' must not be null");
        Assert.notNull(responseBodyWriter, "'responseBodyWriter' must not be null");
        this.response = response;
        this.responseBodyWriter = responseBodyWriter;
    }

    public HttpServletResponse getServletResponse() {
        return this.response;
    }

    @Override
    public void setStatusCode(HttpStatus status) {
        getServletResponse().setStatus(status.value());
    }

    @Override
    protected Mono<Void> writeWithInternal(Publisher<DataBuffer> publisher) {
        return this.responseBodyWriter.apply(publisher);
    }

    @Override
    protected void writeHeaders() {
        for (Map.Entry<String, List<String>> entry : getHeaders().entrySet()) {
            String headerName = entry.getKey();
            for (String headerValue : entry.getValue()) {
                this.response.addHeader(headerName, headerValue);
            }
        }
        MediaType contentType = getHeaders().getContentType();
        if (this.response.getContentType() == null && contentType != null) {
            this.response.setContentType(contentType.toString());
        }
        Charset charset = (contentType != null ? contentType.getCharSet() : null);
        if (this.response.getCharacterEncoding() == null && charset != null) {
            this.response.setCharacterEncoding(charset.name());
        }
    }

    @Override
    protected void writeCookies() {
        for (String name : getCookies().keySet()) {
            for (ResponseCookie httpCookie : getCookies().get(name)) {
                Cookie cookie = new Cookie(name, httpCookie.getValue());
                if (!httpCookie.getMaxAge().isNegative()) {
                    cookie.setMaxAge((int) httpCookie.getMaxAge().getSeconds());
                }
                httpCookie.getDomain().ifPresent(cookie::setDomain);
                httpCookie.getPath().ifPresent(cookie::setPath);
                cookie.setSecure(httpCookie.isSecure());
                cookie.setHttpOnly(httpCookie.isHttpOnly());
                this.response.addCookie(cookie);
            }
        }
    }

}