feat: Add StorageClient

src/main/java/io/appium/java_client/plugins/storage/StorageClient.java

@@ -0,0 +1,248 @@
+/*
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * See the NOTICE file distributed with this work for additional
+ * information regarding copyright ownership.
+ * You may obtain a copy of the License at
+ *
+ *     http://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 io.appium.java_client.plugins.storage;
+
+import org.openqa.selenium.WebDriverException;
+import org.openqa.selenium.json.Json;
+import org.openqa.selenium.remote.ErrorCodec;
+import org.openqa.selenium.remote.codec.AbstractHttpResponseCodec;
+import org.openqa.selenium.remote.codec.w3c.W3CHttpResponseCodec;
+import org.openqa.selenium.remote.http.ClientConfig;
+import org.openqa.selenium.remote.http.Contents;
+import org.openqa.selenium.remote.http.HttpClient;
+import org.openqa.selenium.remote.http.HttpHeader;
+import org.openqa.selenium.remote.http.HttpMethod;
+import org.openqa.selenium.remote.http.HttpRequest;
+import org.openqa.selenium.remote.http.HttpResponse;
+import org.openqa.selenium.remote.http.WebSocket;
+
+import java.io.File;
+import java.net.MalformedURLException;
+import java.net.URI;
+import java.net.URISyntaxException;
+import java.net.URL;
+import java.nio.charset.StandardCharsets;
+import java.util.List;
+import java.util.Map;
+import java.util.Optional;
+import java.util.concurrent.CountDownLatch;
+import java.util.concurrent.TimeUnit;
+import java.util.concurrent.atomic.AtomicReference;
+import java.util.stream.Collectors;
+
+import static io.appium.java_client.plugins.storage.StorageUtils.calcSha1Digest;
+import static io.appium.java_client.plugins.storage.StorageUtils.streamFileToWebSocket;
+
+/**
+ * This is a Java implementation of the Appium server storage plugin client.
+ * See <a href="https://github.com/appium/appium/blob/master/packages/storage-plugin/README.md">the plugin README</a>
+ * for more details.
+ */
+public class StorageClient {
+    public static final String PREFIX = "/storage";
+    private final Json json = new Json();
+    private final AbstractHttpResponseCodec responseCodec = new W3CHttpResponseCodec();
+    private final ErrorCodec errorCodec = ErrorCodec.createDefault();
+
+    private final URL baseUrl;
+    private final HttpClient httpClient;
+
+    public StorageClient(URL baseUrl) {
+        this.baseUrl = baseUrl;
+        this.httpClient = HttpClient.Factory.createDefault().createClient(baseUrl);
+    }
+
+    public StorageClient(ClientConfig clientConfig) {
+        this.httpClient = HttpClient.Factory.createDefault().createClient(clientConfig);
+        this.baseUrl = clientConfig.baseUrl();
+    }
+
+    /**
+     * Adds a local file to the server storage.
+     * The remote file name is be set to the same value as the local file name.
+     *
+     * @param file File instance.
+     */
+    public void add(File file) {
+        add(file, file.getName());
+    }
+
+    /**
+     * Adds a local file to the server storage.
+     *
+     * @param file File instance.
+     * @param name The remote file name.
+     */
+    public void add(File file, String name) {
+        var request = new HttpRequest(HttpMethod.POST, formatPath(baseUrl, PREFIX, "add").toString());
+        var httpResponse = httpClient.execute(setJsonPayload(request, Map.of(
+                "name", name,
+                "sha1", calcSha1Digest(file)
+        )));
+        Map<String, Object> value = requireResponseValue(httpResponse);
+        final var wsTtlMs = (Long) value.get("ttlMs");
+        //noinspection unchecked
+        var wsInfo = (Map<String, Object>) value.get("ws");
+        var streamWsPathname = (String) wsInfo.get("stream");
+        var eventWsPathname = (String) wsInfo.get("events");
+        final var completion = new CountDownLatch(1);
+        final var lastException = new AtomicReference<Throwable>(null);
+        try (var streamWs = httpClient.openSocket(
+                new HttpRequest(HttpMethod.POST, formatPath(baseUrl, streamWsPathname).toString()),
+                new WebSocket.Listener() {}
+        ); var eventsWs = httpClient.openSocket(
+                new HttpRequest(HttpMethod.POST, formatPath(baseUrl, eventWsPathname).toString()),
+                new EventWsListener(lastException, completion)
+        )) {
+            streamFileToWebSocket(file, streamWs);
+            streamWs.close();
+            if (!completion.await(wsTtlMs, TimeUnit.MILLISECONDS)) {
+                throw new IllegalStateException(String.format(
+                        "Could not receive a confirmation about adding '%s' to the server storage within %sms timeout",
+                        name, wsTtlMs
+                ));
+            }
+            var exc = lastException.get();
+            if (exc != null) {
+                throw exc instanceof RuntimeException ? (RuntimeException) exc : new WebDriverException(exc);
+            }
+        } catch (InterruptedException e) {
+            throw new WebDriverException(e);
+        }
+    }
+
+    /**
+     * Lists items that exist in the storage.
+     *
+     * @return All storage items.
+     */
+    public List<StorageItem> list() {
+        var request = new HttpRequest(HttpMethod.GET, formatPath(baseUrl, PREFIX, "list").toString());
+        var httpResponse = httpClient.execute(request);
+        List<Map<String, Object>> items = requireResponseValue(httpResponse);
+        return items.stream().map(item -> new StorageItem(
+                (String) item.get("name"),
+                (String) item.get("path"),
+                (Long) item.get("size")
+        )).collect(Collectors.toList());
+    }
+
+    /**
+     * Deletes an item from the server storage.
+     *
+     * @param name The name of the item to be deleted.
+     * @return true if the dletion was successful.
+     */
+    public boolean delete(String name) {
+        var request = new HttpRequest(HttpMethod.POST, formatPath(baseUrl, PREFIX, "delete").toString());
+        var httpResponse = httpClient.execute(setJsonPayload(request, Map.of(
+                "name", name
+        )));
+        return requireResponseValue(httpResponse);
+    }
+
+    /**
+     * Resets all items of the server storage.
+     */
+    public void reset() {
+        var request = new HttpRequest(HttpMethod.POST, formatPath(baseUrl, PREFIX, "reset").toString());
+        var httpResponse = httpClient.execute(request);
+        requireResponseValue(httpResponse);
+    }
+
+    private static URL formatPath(URL url, String... suffixes) {
+        if (suffixes.length == 0) {
+            return url;
+        }
+        try {
+            var uri = url.toURI();
+            var updatedPath = (uri.getPath() + "/" + String.join("/", suffixes)).replaceAll("(/{2,})", "/");
+            return new URI(
+                    uri.getScheme(),
+                    uri.getAuthority(),
+                    uri.getHost(),
+                    uri.getPort(),
+                    updatedPath,
+                    uri.getQuery(),
+                    uri.getFragment()
+            ).toURL();
+        } catch (URISyntaxException | MalformedURLException e) {
+            throw new IllegalArgumentException(e);
+        }
+    }
+
+    private HttpRequest setJsonPayload(HttpRequest request, Map<String, Object> payload) {
+        var strData = json.toJson(payload);
+        var data = strData.getBytes(StandardCharsets.UTF_8);
+        request.setHeader(HttpHeader.ContentLength.getName(), String.valueOf(data.length));
+        request.setHeader(HttpHeader.ContentType.getName(), "application/json; charset=utf-8");
+        request.setContent(Contents.bytes(data));
+        return request;
+    }
+
+    private <T> T requireResponseValue(HttpResponse httpResponse) {
+        var response = responseCodec.decode(httpResponse);
+        var value = response.getValue();
+        if (value instanceof WebDriverException) {
+            throw (WebDriverException) value;
+        }
+        //noinspection unchecked
+        return (T) response.getValue();
+    }
+
+    private final class EventWsListener implements WebSocket.Listener {
+        private final AtomicReference<Throwable> lastException;
+        private final CountDownLatch completion;
+
+        public EventWsListener(AtomicReference<Throwable> lastException, CountDownLatch completion) {
+            this.lastException = lastException;
+            this.completion = completion;
+        }
+
+        @Override
+        public void onBinary(byte[] data) {
+            extractException(new String(data, StandardCharsets.UTF_8)).ifPresent(lastException::set);
+            completion.countDown();
+        }
+
+        @Override
+        public void onText(CharSequence data) {
+            extractException(data.toString()).ifPresent(lastException::set);
+            completion.countDown();
+        }
+
+        @Override
+        public void onError(Throwable cause) {
+            lastException.set(cause);
+            completion.countDown();
+        }
+
+        private Optional<WebDriverException> extractException(String payload) {
+            try {
+                Map<String, Object> record = json.toType(payload, Json.MAP_TYPE);
+                //noinspection unchecked
+                var value = (Map<String, Object>) record.get("value");
+                if ((Boolean) value.get("success")) {
+                    return Optional.empty();
+                }
+                return Optional.of(errorCodec.decode(record));
+            } catch (Exception e) {
+                return Optional.of(new WebDriverException(payload, e));
+            }
+        }
+    }
+}

src/main/java/io/appium/java_client/plugins/storage/StorageItem.java

@@ -0,0 +1,10 @@
+package io.appium.java_client.plugins.storage;
+
+import lombok.Value;
+
+@Value
+public class StorageItem {
+    String name;
+    String path;
+    long size;
+}

src/main/java/io/appium/java_client/plugins/storage/StorageUtils.java

@@ -0,0 +1,90 @@
+/*
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * See the NOTICE file distributed with this work for additional
+ * information regarding copyright ownership.
+ * You may obtain a copy of the License at
+ *
+ *     http://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 io.appium.java_client.plugins.storage;
+
+import org.openqa.selenium.remote.http.WebSocket;
+
+import java.io.BufferedInputStream;
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.IOException;
+import java.io.UncheckedIOException;
+import java.security.MessageDigest;
+import java.security.NoSuchAlgorithmException;
+import java.util.Formatter;
+
+public class StorageUtils {
+    private static final int BUFFER_SIZE = 0xFFFF;
+
+    private StorageUtils() {
+    }
+
+    /**
+     * Calculates SHA1 hex digest of the given file.
+     *
+     * @param source The file instance to calculate the hash for.
+     * @return Hash digest represented as a string of hexadecimal numbers.
+     */
+    public static String calcSha1Digest(File source) {
+        MessageDigest sha1sum;
+        try {
+            sha1sum = MessageDigest.getInstance("SHA-1");
+        } catch (NoSuchAlgorithmException e) {
+            throw new IllegalStateException(e);
+        }
+        var buffer = new byte[BUFFER_SIZE];
+        int bytesRead;
+        try (var in = new BufferedInputStream(new FileInputStream(source))) {
+            while ((bytesRead = in.read(buffer)) != -1) {
+                sha1sum.update(buffer, 0, bytesRead);
+            }
+        } catch (IOException e) {
+            throw new UncheckedIOException(e);
+        }
+        return byteToHex(sha1sum.digest());
+    }
+
+    /**
+     * Feeds the content of the given file to the provided web socket.
+     *
+     * @param source The source file instance.
+     * @param socket The destination web socket.
+     */
+    public static void streamFileToWebSocket(File source, WebSocket socket) {
+        var buffer = new byte[BUFFER_SIZE];
+        int bytesRead;
+        try (var in = new BufferedInputStream(new FileInputStream(source))) {
+            while ((bytesRead = in.read(buffer)) != -1) {
+                var currentBuffer = new byte[bytesRead];
+                System.arraycopy(buffer, 0, currentBuffer, 0, bytesRead);
+                socket.sendBinary(currentBuffer);
+            }
+        } catch (IOException e) {
+            throw new UncheckedIOException(e);
+        }
+    }
+
+    private static String byteToHex(final byte[] hash) {
+        var formatter = new Formatter();
+        for (byte b : hash) {
+            formatter.format("%02x", b);
+        }
+        var result = formatter.toString();
+        formatter.close();
+        return result;
+    }
+}