Add http-request-function and processor app
* Update README * Clean up per review * Added function README * Remove `HttpRequestProcessorProperties$Retry` from the whitelist
This commit is contained in:
David Turanski
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/*
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* Copyright 2020-2020 the original author or authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* https://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.springframework.cloud.stream.app.processor.http.request;
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import java.io.IOException;
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import java.util.HashMap;
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import java.util.Map;
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import com.fasterxml.jackson.databind.ObjectMapper;
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import okhttp3.mockwebserver.Dispatcher;
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import okhttp3.mockwebserver.MockResponse;
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import okhttp3.mockwebserver.MockWebServer;
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import okhttp3.mockwebserver.RecordedRequest;
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import org.junit.jupiter.api.AfterAll;
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import org.junit.jupiter.api.BeforeAll;
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import org.junit.jupiter.api.BeforeEach;
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import org.junit.jupiter.api.Test;
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import org.springframework.boot.autoconfigure.SpringBootApplication;
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import org.springframework.boot.test.context.runner.ApplicationContextRunner;
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import org.springframework.cloud.stream.binder.test.InputDestination;
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import org.springframework.cloud.stream.binder.test.OutputDestination;
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import org.springframework.cloud.stream.binder.test.TestChannelBinderConfiguration;
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import org.springframework.http.HttpStatus;
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import org.springframework.http.MediaType;
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import org.springframework.messaging.Message;
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import org.springframework.messaging.MessageHeaders;
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import org.springframework.messaging.support.MessageBuilder;
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import static org.assertj.core.api.Assertions.assertThat;
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import static org.assertj.core.api.Assertions.assertThatIllegalStateException;
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public class HttpRequestProcessorTests {
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private static MockWebServer server;
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private ApplicationContextRunner applicationContextRunner;
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@BeforeEach
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void setup() {
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applicationContextRunner = new ApplicationContextRunner().withUserConfiguration(
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TestChannelBinderConfiguration.getCompleteConfiguration(HttpRequestProcessorApp.class));
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}
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@BeforeAll
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static void startServer() {
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server = new MockWebServer();
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server.setDispatcher(new Dispatcher() {
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@Override
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public MockResponse dispatch(RecordedRequest recordedRequest) {
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return new MockResponse()
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.setBody(recordedRequest.getBody())
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.setResponseCode(HttpStatus.OK.value());
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}
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});
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}
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@AfterAll
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static void shutdownServer() throws IOException {
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server.shutdown();
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}
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private String url() {
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return String.format("http://localhost:%d", server.getPort());
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}
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@Test
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void requestUsingExpressions() throws IOException {
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applicationContextRunner
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.withPropertyValues(
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"http.request.processor.url-expression=headers['url']",
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"http.request.processor.http-method-expression=headers['method']",
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"http.request.processor.body-expression=headers['body']",
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"http.request.processor.headers-expression={Accept:'application/json'}",
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"http.request.processor.reply-expression=#root")
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.run(context -> {
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Message<?> message = MessageBuilder.withPayload("")
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.setHeader("url", url())
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.setHeader("method", "POST")
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.setHeader("body", "{\"hello\":\"world\"}")
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.build();
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InputDestination inputDestination = context.getBean(InputDestination.class);
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OutputDestination outputDestination = context.getBean(OutputDestination.class);
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ObjectMapper objectMapper = context.getBean(ObjectMapper.class);
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inputDestination.send(message);
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Message<byte[]> reply = outputDestination.receive(100);
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// Cannot deserialize ResponseEntity directly.
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Map responseEntityAsMap = objectMapper.readValue(reply.getPayload(), HashMap.class);
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System.out.println(responseEntityAsMap);
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assertThat(responseEntityAsMap.get("statusCode")).isEqualTo("OK");
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assertThat(responseEntityAsMap.get("body")).isEqualTo(message.getHeaders().get("body"));
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assertThat(reply.getHeaders().get(MessageHeaders.CONTENT_TYPE))
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.isEqualTo(MediaType.APPLICATION_JSON);
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});
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}
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@Test
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void requestUsingReturnType() throws IOException {
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applicationContextRunner
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.withPropertyValues(
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"http.request.processor.url=" + url(),
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"http.request.processor.httpMethod=POST",
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"http.request.processor.headers[Accept]=application/octet-stream",
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"http.request.processor.expectedResponseType=byte[]",
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"spring.cloud.stream.bindings.httpRequestProcessor-out-0.contentType=application/octet-stream")
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.run(context -> {
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Message<?> message = MessageBuilder.withPayload("hello")
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.build();
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InputDestination inputDestination = context.getBean(InputDestination.class);
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OutputDestination outputDestination = context.getBean(OutputDestination.class);
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inputDestination.send(message);
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Message<byte[]> reply = outputDestination.receive(100);
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assertThat(new String(reply.getPayload())).isEqualTo(message.getPayload());
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assertThat(reply.getHeaders().get(MessageHeaders.CONTENT_TYPE))
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.isEqualTo(MediaType.APPLICATION_OCTET_STREAM);
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});
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}
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@Test
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void requestUsingJsonPathMethodExpression() throws IOException {
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applicationContextRunner
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.withPropertyValues(
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"http.request.processor.url=" + url(),
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"http.request.processor.httpMethodExpression=#jsonPath(payload,'$.myMethod')")
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.run(context -> {
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Message<?> message = MessageBuilder
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.withPayload("{\"name\":\"Fred\",\"age\":41, \"myMethod\":\"POST\"}")
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.build();
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InputDestination inputDestination = context.getBean(InputDestination.class);
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OutputDestination outputDestination = context.getBean(OutputDestination.class);
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inputDestination.send(message);
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Message<byte[]> reply = outputDestination.receive(100);
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assertThat(new String(reply.getPayload())).isEqualTo(message.getPayload());
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});
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}
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@Test
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void cannotSpecifyBothUrlandUrlExpression() {
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applicationContextRunner
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.withPropertyValues("http.request.processor.url=http://example.com",
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"http.request.processor.url-expression=headers['url']")
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.run(context -> {
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assertThatIllegalStateException().isThrownBy(() -> {
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context.start();
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});
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});
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}
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@Test
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void cannotSpecifyBothHttpMethosdandHttpMethodExpression() {
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applicationContextRunner
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.withPropertyValues("http.request.processor.http-method=POST",
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"http.request.processor.http-method-expression=headers['method']")
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.run(context -> {
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assertThatIllegalStateException().isThrownBy(() -> {
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context.start();
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});
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});
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}
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@Test
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void cannotSpecifyBothHeadersAndHeadersExpression() {
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applicationContextRunner
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.withPropertyValues("http.request.processor.headers[Content-Type]=application/json",
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"http.request.processor.headers-expression={'Content-Type': headers['content']}")
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.run(context -> {
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assertThatIllegalStateException().isThrownBy(() -> {
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context.start();
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});
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});
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}
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@SpringBootApplication
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static class HttpRequestProcessorApp {
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}
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}
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@@ -0,0 +1,2 @@
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integration:\
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org.springframework.cloud.stream.binder.test.TestChannelBinderConfiguration
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