forked from spring-projects/spring-framework
/
DefaultClientResponseBuilder.java
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/
DefaultClientResponseBuilder.java
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/*
* Copyright 2002-2020 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
*
* https://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.web.reactive.function.client;
import java.net.URI;
import java.nio.charset.StandardCharsets;
import java.util.function.Consumer;
import reactor.core.publisher.Flux;
import org.springframework.core.io.buffer.DataBuffer;
import org.springframework.core.io.buffer.DataBufferFactory;
import org.springframework.core.io.buffer.DataBufferUtils;
import org.springframework.core.io.buffer.DefaultDataBufferFactory;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpRequest;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseCookie;
import org.springframework.http.client.reactive.ClientHttpResponse;
import org.springframework.util.Assert;
import org.springframework.util.CollectionUtils;
import org.springframework.util.LinkedMultiValueMap;
import org.springframework.util.MultiValueMap;
/**
* Default implementation of {@link ClientResponse.Builder}.
*
* @author Arjen Poutsma
* @since 5.0.5
*/
final class DefaultClientResponseBuilder implements ClientResponse.Builder {
private static final HttpRequest EMPTY_REQUEST = new HttpRequest() {
private final URI empty = URI.create("");
@Override
public String getMethodValue() {
return "UNKNOWN";
}
@Override
public URI getURI() {
return this.empty;
}
@Override
public HttpHeaders getHeaders() {
return HttpHeaders.EMPTY;
}
};
private ExchangeStrategies strategies;
private int statusCode = 200;
private final HttpHeaders headers = new HttpHeaders();
private final MultiValueMap<String, ResponseCookie> cookies = new LinkedMultiValueMap<>();
private Flux<DataBuffer> body = Flux.empty();
private HttpRequest request;
public DefaultClientResponseBuilder(ExchangeStrategies strategies) {
Assert.notNull(strategies, "ExchangeStrategies must not be null");
this.strategies = strategies;
this.request = EMPTY_REQUEST;
}
public DefaultClientResponseBuilder(ClientResponse other) {
Assert.notNull(other, "ClientResponse must not be null");
this.strategies = other.strategies();
this.statusCode = other.rawStatusCode();
this.headers.addAll(other.headers().asHttpHeaders());
this.cookies.addAll(other.cookies());
if (other instanceof DefaultClientResponse) {
this.request = ((DefaultClientResponse) other).request();
}
else {
this.request = EMPTY_REQUEST;
}
}
@Override
public DefaultClientResponseBuilder statusCode(HttpStatus statusCode) {
return rawStatusCode(statusCode.value());
}
@Override
public DefaultClientResponseBuilder rawStatusCode(int statusCode) {
Assert.isTrue(statusCode >= 100 && statusCode < 600, "StatusCode must be between 1xx and 5xx");
this.statusCode = statusCode;
return this;
}
@Override
public ClientResponse.Builder header(String headerName, String... headerValues) {
for (String headerValue : headerValues) {
this.headers.add(headerName, headerValue);
}
return this;
}
@Override
public ClientResponse.Builder headers(Consumer<HttpHeaders> headersConsumer) {
headersConsumer.accept(this.headers);
return this;
}
@Override
public DefaultClientResponseBuilder cookie(String name, String... values) {
for (String value : values) {
this.cookies.add(name, ResponseCookie.from(name, value).build());
}
return this;
}
@Override
public ClientResponse.Builder cookies(Consumer<MultiValueMap<String, ResponseCookie>> cookiesConsumer) {
cookiesConsumer.accept(this.cookies);
return this;
}
@Override
public ClientResponse.Builder body(Flux<DataBuffer> body) {
Assert.notNull(body, "Body must not be null");
releaseBody();
this.body = body;
return this;
}
@Override
public ClientResponse.Builder body(String body) {
Assert.notNull(body, "Body must not be null");
releaseBody();
DataBufferFactory dataBufferFactory = new DefaultDataBufferFactory();
this.body = Flux.just(body).
map(s -> {
byte[] bytes = body.getBytes(StandardCharsets.UTF_8);
return dataBufferFactory.wrap(bytes);
});
return this;
}
private void releaseBody() {
this.body.subscribe(DataBufferUtils.releaseConsumer());
}
@Override
public ClientResponse.Builder request(HttpRequest request) {
Assert.notNull(request, "Request must not be null");
this.request = request;
return this;
}
@Override
public ClientResponse build() {
ClientHttpResponse httpResponse =
new BuiltClientHttpResponse(this.statusCode, this.headers, this.cookies, this.body);
// When building ClientResponse manually, the ClientRequest.logPrefix() has to be passed,
// e.g. via ClientResponse.Builder, but this (builder) is not used currently.
return new DefaultClientResponse(httpResponse, this.strategies, "", "", () -> this.request);
}
private static class BuiltClientHttpResponse implements ClientHttpResponse {
private final int statusCode;
private final HttpHeaders headers;
private final MultiValueMap<String, ResponseCookie> cookies;
private final Flux<DataBuffer> body;
public BuiltClientHttpResponse(int statusCode, HttpHeaders headers,
MultiValueMap<String, ResponseCookie> cookies, Flux<DataBuffer> body) {
this.statusCode = statusCode;
this.headers = HttpHeaders.readOnlyHttpHeaders(headers);
this.cookies = CollectionUtils.unmodifiableMultiValueMap(cookies);
this.body = body;
}
@Override
public HttpStatus getStatusCode() {
return HttpStatus.valueOf(this.statusCode);
}
@Override
public int getRawStatusCode() {
return this.statusCode;
}
@Override
public HttpHeaders getHeaders() {
return this.headers;
}
@Override
public MultiValueMap<String, ResponseCookie> getCookies() {
return this.cookies;
}
@Override
public Flux<DataBuffer> getBody() {
return this.body;
}
}
}