10000 feat(functions): add missing XML parsing sample · coderatgoogle/java-docs-samples@ad37c55 · GitHub
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feat(functions): add missing XML parsing sample
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‎functions/http/parse-xml/pom.xml

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<?xml version="1.0" encoding="UTF-8"?>
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<!--
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Copyright 2022 Google LLC
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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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http://www.apache.org/licenses/LICENSE-2.0
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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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<project xmlns="http://maven.apache.org/POM/4.0.0"
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xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
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<modelVersion>4.0.0</modelVersion>
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<groupId>com.example.cloud.functions</groupId>
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<artifactId>functions-http-parse-xml</artifactId>
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<parent>
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<groupId>com.google.cloud.samples</groupId>
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<artifactId>shared-configuration</artifactId>
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<version>1.2.0</version>
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</parent>
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<properties>
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<maven.compiler.target>11</maven.compiler.target>
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<maven.compiler.source>11</maven.compiler.source>
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<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
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</properties>
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<dependencies>
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<dependency>
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<groupId>com.google.code.gson</groupId>
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<artifactId>gson</artifactId>
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<version>2.8.8</version>
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</dependency>
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<dependency>
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<groupId>com.google.cloud.functions</groupId>
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<artifactId>functions-framework-api</artifactId>
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<version>1.0.4</version>
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<scope>provided</scope>
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</dependency>
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<!-- The following dependencies are only required for testing -->
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<dependency>
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<groupId>com.google.truth</groupId>
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<artifactId>truth</artifactId>
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<version>1.1.3</version>
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<scope>test</scope>
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</dependency>
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<dependency>
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<groupId>junit</groupId>
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<artifactId>junit</artifactId>
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<version>4.13.2</version>
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<scope>test</scope>
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</dependency>
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<dependency>
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<groupId>org.mockito</groupId>
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<artifactId>mockito-core</artifactId>
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<version>4.1.0</version>
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<scope>test</scope>
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</dependency>
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</dependencies>
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<build>
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<plugins>
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<plugin>
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<!--
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Google Cloud Functions Framework Maven plugin
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This plugin allows you to run Cloud Functions Java code
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locally. Use the following terminal command to run a
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given function locally:
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mvn function:run -Drun.functionTarget=your.package.yourFunction
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-->
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<groupId>com.google.cloud.functions</groupId>
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<artifactId>function-maven-plugin</artifactId>
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<version>0.10.0</version>
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<configuration>
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<functionTarget>functions.ParseContentType</functionTarget>
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</configuration>
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</plugin>
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<plugin>
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<groupId>org.apache.maven.plugins</groupId>
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<artifactId>maven-surefire-plugin</artifactId>
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<version>3.0.0-M5</version>
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<configuration>
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<skipTests>${skipTests}</skipTests>
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<reportNameSuffix>sponge_log</reportNameSuffix>
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<trimStackTrace>false</trimStackTrace>
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</configuration>
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</plugin>
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</plugins>
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</build>
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</project>

‎functions/http/parse-xml/src/main/java/functions/ParseXml.java

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/*
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* Copyright 2022 Google LLC
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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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* http://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 functions;
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// [START functions_http_xml]
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import com.google.cloud.functions.HttpFunction;
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import com.google.cloud.functions.HttpRequest;
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import com.google.cloud.functions.HttpResponse;
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import java.io.ByteArrayInputStream;
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import java.io.IOException;
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import java.io.InputStream;
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import java.io.PrintWriter;
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import java.net.HttpURLConnection;
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import javax.xml.parsers.DocumentBuilder;
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import javax.xml.parsers.DocumentBuilderFactory;
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import javax.xml.parsers.ParserConfigurationException;
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import org.w3c.dom.Document;
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import org.xml.sax.SAXException;
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public class ParseXml implements HttpFunction {
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private static DocumentBuilderFactory dbFactory = DocumentBuilderFactory.newInstance();
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// Parses a HTTP request in XML format
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// (Responds with a 400 error if the HTTP request isn't valid XML.)
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@Override
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public void service(HttpRequest request, HttpResponse response)
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throws IOException, ParserConfigurationException {
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try {
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DocumentBuilder dBuilder = dbFactory.newDocumentBuilder();
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var writer = new PrintWriter(response.getWriter());
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// Get request body
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InputStream bodyStream = new ByteArrayInputStream(
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request.getInputStream().readAllBytes());
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// Parse + process XML
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Document doc = dBuilder.parse(bodyStream);
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writer.printf("Root element: %s", doc.getDocumentElement().getNodeName());
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} catch (SAXException e) {
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response.setStatusCode(HttpURLConnection.HTTP_BAD_REQUEST);
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return;
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}
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}
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}
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// [END functions_http_xml]

‎functions/http/parse-xml/src/test/java/functions/ParseXmlTest.java

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/*
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* Copyright 2022 Google LLC
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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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* http://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 functions;
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import static com.google.common.truth.Truth.assertThat;
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import static org.mockito.Mockito.times;
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import static org.mockito.Mockito.verify;
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import static org.mockito.Mockito.when;
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import com.google.cloud.functions.HttpRequest;
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import com.google.cloud.functions.HttpResponse;
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import java.io.BufferedReader;
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import java.io.BufferedWriter;
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import java.io.ByteArrayInputStream;
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import java.io.IOException;
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import java.io.StringReader;
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import java.io.StringWriter;
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import java.net.HttpURLConnection;
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import java.nio.charset.StandardCharsets;
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import javax.xml.parsers.ParserConfigurationException;
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import org.junit.Before;
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import org.junit.Test;
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import org.junit.runner.RunWith;
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import org.junit.runners.JUnit4;
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import org.mockito.Mock;
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import org.mockito.MockitoAnnotations;
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@RunWith(JUnit4.class)
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public class ParseXmlTest {
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@Mock private HttpRequest request;
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@Mock private HttpResponse response;
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private BufferedWriter writerOut;
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private StringWriter responseOut;
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@Before
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public void beforeTest() throws IOException {
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MockitoAnnotations.initMocks(this);
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responseOut = new StringWriter();
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writerOut = new BufferedWriter(responseOut);
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when(response.getWriter()).thenReturn(writerOut);
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}
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@Test
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public void parseXmlTest_handlesXml() throws IOException, ParserConfigurationException {
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// Send a request with XML data
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String requestContent = "<?xml version=\"1.0\"?>\n<name>John</name>\n";
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BufferedReader bodyReader = new BufferedReader(new StringReader(requestContent));
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when(request.getInputStream()).thenReturn(
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new ByteArrayInputStream(requestContent.getBytes(StandardCharsets.UTF_8)));
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new ParseXml().service(request, response);
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writerOut.flush();
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assertThat(responseOut.toString()).contains("Root element: name");
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}
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@Test
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public void parseXmlTest_handlesNonXml() throws IOException, ParserConfigurationException {
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// Send a request with plain text
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String requestContent = "I am not XML!";
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BufferedReader bodyReader = new BufferedReader(new StringReader(requestContent));
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when(request.getInputStream()).thenReturn(
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new ByteArrayInputStream(requestContent.getBytes(StandardCharsets.UTF_8)));
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new ParseXml().service(request, response);
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verify(response, times(1)).setStatusCode(HttpURLConnection.HTTP_BAD_REQUEST);
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}
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}

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