spring InterceptingClientHttpRequest 源码

spring InterceptingClientHttpRequest 代码

文件路径：/spring-web/src/main/java/org/springframework/http/client/InterceptingClientHttpRequest.java

/*
 * Copyright 2002-2021 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.http.client;

import java.io.IOException;
import java.net.URI;
import java.util.Iterator;
import java.util.List;

import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpMethod;
import org.springframework.http.HttpRequest;
import org.springframework.http.StreamingHttpOutputMessage;
import org.springframework.util.StreamUtils;

/**
 * Wrapper for a {@link ClientHttpRequest} that has support for {@link ClientHttpRequestInterceptor
 * ClientHttpRequestInterceptors}.
 *
 * @author Arjen Poutsma
 * @since 3.1
 */
class InterceptingClientHttpRequest extends AbstractBufferingClientHttpRequest {

	private final ClientHttpRequestFactory requestFactory;

	private final List<ClientHttpRequestInterceptor> interceptors;

	private final HttpMethod method;

	private final URI uri;


	protected InterceptingClientHttpRequest(ClientHttpRequestFactory requestFactory,
			List<ClientHttpRequestInterceptor> interceptors, URI uri, HttpMethod method) {

		this.requestFactory = requestFactory;
		this.interceptors = interceptors;
		this.method = method;
		this.uri = uri;
	}


	@Override
	public HttpMethod getMethod() {
		return this.method;
	}

	@Override
	@Deprecated
	public String getMethodValue() {
		return this.method.name();
	}

	@Override
	public URI getURI() {
		return this.uri;
	}

	@Override
	protected final ClientHttpResponse executeInternal(HttpHeaders headers, byte[] bufferedOutput) throws IOException {
		InterceptingRequestExecution requestExecution = new InterceptingRequestExecution();
		return requestExecution.execute(this, bufferedOutput);
	}


	private class InterceptingRequestExecution implements ClientHttpRequestExecution {

		private final Iterator<ClientHttpRequestInterceptor> iterator;

		public InterceptingRequestExecution() {
			this.iterator = interceptors.iterator();
		}

		@Override
		public ClientHttpResponse execute(HttpRequest request, byte[] body) throws IOException {
			if (this.iterator.hasNext()) {
				ClientHttpRequestInterceptor nextInterceptor = this.iterator.next();
				return nextInterceptor.intercept(request, body, this);
			}
			else {
				HttpMethod method = request.getMethod();
				ClientHttpRequest delegate = requestFactory.createRequest(request.getURI(), method);
				request.getHeaders().forEach((key, value) -> delegate.getHeaders().addAll(key, value));
				if (body.length > 0) {
					if (delegate instanceof StreamingHttpOutputMessage streamingOutputMessage) {
						streamingOutputMessage.setBody(outputStream -> StreamUtils.copy(body, outputStream));
					}
					else {
						StreamUtils.copy(body, delegate.getBody());
					}
				}
				return delegate.execute();
			}
		}
	}

}

相关信息

spring 源码目录

相关文章

spring AbstractBufferingClientHttpRequest 源码

spring AbstractClientHttpRequest 源码

spring AbstractClientHttpRequestFactoryWrapper 源码

spring AbstractClientHttpResponse 源码

spring BufferingClientHttpRequestFactory 源码

spring BufferingClientHttpRequestWrapper 源码

spring BufferingClientHttpResponseWrapper 源码

spring ClientHttpRequest 源码

spring ClientHttpRequestExecution 源码

spring ClientHttpRequestFactory 源码