Add OkHttp example

Author: ivanp81

spring-rest/pom.xml

@@ -15,7 +15,7 @@
     <dependencies>
 
         <!-- Spring Boot Dependencies -->
-        
+
         <dependency>
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-thymeleaf</artifactId>
@@ -71,7 +71,7 @@
             <groupId>com.fasterxml.jackson.core</groupId>
             <artifactId>jackson-databind</artifactId>
         </dependency>
-        
+
         <dependency>
 		    <groupId>com.fasterxml.jackson.dataformat</groupId>
 		    <artifactId>jackson-dataformat-xml</artifactId>
@@ -118,6 +118,14 @@
             <artifactId>log4j-over-slf4j</artifactId>
         </dependency>
 
+        <!-- okhttp -->
+
+        <dependency>
+            <groupId>com.squareup.okhttp3</groupId>
+            <artifactId>okhttp</artifactId>
+            <version>${com.squareup.okhttp3.version}</version>
+        </dependency>
+
         <!-- test scoped -->
 
         <dependency>
@@ -153,14 +161,14 @@
 		    <artifactId>rest-assured</artifactId>
 		    <version>${rest-assured.version}</version>
 		</dependency>
-        
+
         <!--  -->
         <dependency>
             <groupId>com.google.protobuf</groupId>
             <artifactId>protobuf-java</artifactId>
             <version>2.6.1</version>
         </dependency>
-        
+
         <dependency>
             <groupId>com.esotericsoftware</groupId>
             <artifactId>kryo</artifactId>
@@ -198,7 +206,7 @@
                 <artifactId>maven-surefire-plugin</artifactId>
                 <configuration>
                     <excludes>
-                         <exclude>**/*LiveTest.java</exclude> 
+                         <exclude>**/*LiveTest.java</exclude>
                     </excludes>
                     <systemPropertyVariables>
                         <!-- <provPersistenceTarget>h2</provPersistenceTarget> -->
@@ -285,7 +293,7 @@
             </build>
         </profile>
     </profiles>
-        
+
     <properties>
         <!-- Spring -->
 
@@ -320,6 +328,9 @@
         <maven-surefire-plugin.version>2.19.1</maven-surefire-plugin.version>
         <cargo-maven2-plugin.version>1.6.0</cargo-maven2-plugin.version>
 
+        <!-- okhttp -->
+        <com.squareup.okhttp3.version>3.4.1</com.squareup.okhttp3.version>
+
     </properties>
 
 </project>

spring-rest/src/test/java/org/baeldung/okhttp/DefaultContentTypeInterceptor.java

@@ -0,0 +1,26 @@
+package org.baeldung.okhttp;
+
+import java.io.IOException;
+
+import okhttp3.Interceptor;
+import okhttp3.Request;
+import okhttp3.Response;
+
+public class DefaultContentTypeInterceptor implements Interceptor {
+
+    private final String contentType;
+
+    public DefaultContentTypeInterceptor(String contentType) {
+        this.contentType = contentType;
+    }
+
+    public Response intercept(Interceptor.Chain chain) throws IOException {
+
+        Request originalRequest = chain.request();
+        Request requestWithUserAgent = originalRequest.newBuilder()
+          .header("Content-Type", contentType)
+          .build();
+
+        return chain.proceed(requestWithUserAgent);
+    }
+}

spring-rest/src/test/java/org/baeldung/okhttp/OkHttpFileUploadingTest.java

@@ -0,0 +1,81 @@
+package org.baeldung.okhttp;
+
+import static org.hamcrest.Matchers.equalTo;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertThat;
+
+import java.io.File;
+import java.io.IOException;
+
+import org.baeldung.okhttp.ProgressRequestWrapper;
+import org.junit.Test;
+
+import okhttp3.Call;
+import okhttp3.MediaType;
+import okhttp3.MultipartBody;
+import okhttp3.OkHttpClient;
+import okhttp3.Request;
+import okhttp3.RequestBody;
+import okhttp3.Response;
+
+public class OkHttpFileUploadingTest {
+
+    private static final String BASE_URL = "http://localhost:8080/spring-rest";
+
+    @Test
+    public void whenUploadFile_thenCorrect() throws IOException {
+
+        OkHttpClient client = new OkHttpClient();
+
+        RequestBody requestBody = new MultipartBody.Builder()
+          .setType(MultipartBody.FORM)
+          .addFormDataPart("file", "file.txt",
+            RequestBody.create(MediaType.parse("application/octet-stream"), new File("src/test/resources/test.txt")))
+          .build();
+
+        Request request = new Request.Builder()
+                .url(BASE_URL + "/users/upload")
+                .post(requestBody)
+                .build();
+
+        Call call = client.newCall(request);
+        Response response = call.execute();
+
+        assertThat(response.code(), equalTo(200));
+    }
+
+    @Test
+    public void whenGetUploadFileProgress_thenCorrect() throws IOException {
+
+        OkHttpClient client = new OkHttpClient();
+
+        RequestBody requestBody = new MultipartBody.Builder()
+          .setType(MultipartBody.FORM)
+          .addFormDataPart("file", "file.txt",
+            RequestBody.create(MediaType.parse("application/octet-stream"), new File("src/test/resources/test.txt")))
+          .build();
+
+
+        ProgressRequestWrapper.ProgressListener listener = new ProgressRequestWrapper.ProgressListener() {
+
+            public void onRequestProgress(long bytesWritten, long contentLength) {
+
+                float percentage = 100f * bytesWritten / contentLength;
+                assertFalse(Float.compare(percentage, 100) > 0);
+            }
+        };
+
+        ProgressRequestWrapper countingBody = new ProgressRequestWrapper(requestBody, listener);
+
+        Request request = new Request.Builder()
+                .url(BASE_URL + "/users/upload")
+                .post(countingBody)
+                .build();
+
+        Call call = client.newCall(request);
+        Response response = call.execute();
+
+        assertThat(response.code(), equalTo(200));
+
+    }
+}

spring-rest/src/test/java/org/baeldung/okhttp/OkHttpGetTest.java

@@ -0,0 +1,78 @@
+package org.baeldung.okhttp;
+
+import static org.hamcrest.Matchers.equalTo;
+import static org.junit.Assert.assertThat;
+
+import java.io.IOException;
+
+import org.junit.Test;
+
+import okhttp3.Call;
+import okhttp3.Callback;
+import okhttp3.HttpUrl;
+import okhttp3.OkHttpClient;
+import okhttp3.Request;
+import okhttp3.Response;
+
+public class OkHttpGetTest {
+
+    private static final String BASE_URL = "http://localhost:8080/spring-rest";
+
+    @Test
+    public void whenGetRequest_thenCorrect() throws IOException {
+
+        OkHttpClient client = new OkHttpClient();
+
+        Request request = new Request.Builder()
+          .url(BASE_URL + "/date")
+          .build();
+
+        Call call = client.newCall(request);
+        Response response = call.execute();
+
+        assertThat(response.code(), equalTo(200));
+    }
+
+    @Test
+    public void whenGetRequestWithQueryParameter_thenCorrect() throws IOException {
+
+        OkHttpClient client = new OkHttpClient();
+
+        HttpUrl.Builder urlBuilder = HttpUrl.parse(BASE_URL + "/ex/bars").newBuilder();
+        urlBuilder.addQueryParameter("id", "1");
+
+        String url = urlBuilder.build().toString();
+
+        Request request = new Request.Builder()
+          .url(url)
+          .build();
+
+        Call call = client.newCall(request);
+        Response response = call.execute();
+
+        assertThat(response.code(), equalTo(200));
+    }
+
+    @Test
+    public void whenAsynchronousGetRequest_thenCorrect() {
+
+        OkHttpClient client = new OkHttpClient();
+
+        Request request = new Request.Builder()
+          .url(BASE_URL + "/date")
+          .build();
+
+        Call call = client.newCall(request);
+
+        call.enqueue(new Callback() {
+
+            public void onResponse(Call call, Response response) throws IOException {
+                assertThat(response.code(), equalTo(200));
+            }
+
+            public void onFailure(Call call, IOException e) {
+
+            }
+        });
+    }
+}

spring-rest/src/test/java/org/baeldung/okhttp/OkHttpHeaderTest.java

@@ -0,0 +1,48 @@
+package org.baeldung.okhttp;
+
+import java.io.IOException;
+
+import org.junit.Test;
+
+import okhttp3.Call;
+import okhttp3.OkHttpClient;
+import okhttp3.Request;
+import okhttp3.Response;
+
+public class OkHttpHeaderTest {
+
+    private static final String SAMPLE_URL = "http://www.github.com";
+
+    @Test
+    public void whenSetHeader_thenCorrect() throws IOException {
+
+        OkHttpClient client = new OkHttpClient();
+
+        Request request = new Request.Builder()
+          .url(SAMPLE_URL)
+          .addHeader("Content-Type", "application/json")
+          .build();
+
+        Call call = client.newCall(request);
+        Response response = call.execute();
+        response.close();
+    }
+
+    @Test
+    public void whenSetDefaultHeader_thenCorrect() throws IOException {
+
+        OkHttpClient client = new OkHttpClient.Builder()
+          .addInterceptor(new DefaultContentTypeInterceptor("application/json"))
+          .build();
+
+        Request request = new Request.Builder()
+          .url(SAMPLE_URL)
+          .build();
+
+        Call call = client.newCall(request);
+        Response response = call.execute();
+        response.close();
+    }
+
+
+}