feat(cloud_sql/sqlserver): update to V2 sample

cloud_sql/sqlserver/pdo/README.md

@@ -18,10 +18,10 @@ To authenticate with Cloud SQL, set the `$GOOGLE_APPLICATION_CREDENTIALS` enviro
 export GOOGLE_APPLICATION_CREDENTIALS=/path/to/service/account/key.json
 ```
 
-To run the Cloud SQL proxy, you need to set the instance connection name. See the instructions [here](https://cloud.google.com/sql/docs/sqlserver/quickstart-proxy-test#get_the_instance_connection_name) for finding the instance connection name.
+To run the Cloud SQL proxy, you need to set the instance connection name. See the instructions [here](https://cloud.google.com/sql/docs/sqlserver/connect-instance-auth-proxy#get-connection-name) for finding the instance connection name.
 
 ```bash
-export INSTANCE_CONNECTION_NAME='<MY-PROJECT>:<INSTANCE-REGION>:<INSTANCE-NAME>'
+export INSTANCE_CONNECTION_NAME='<PROJECT-ID>:<INSTANCE-REGION>:<INSTANCE-NAME>'
 ```
 
 Once the proxy is ready, use one of the following commands to start the proxy in the background.
@@ -39,9 +39,9 @@ $ ./cloud_sql_proxy \
 Set the required environment variables for your connection to Cloud SQL.
 
 ```bash
-export DB_USER='my-db-user'
-export DB_PASS='my-db-pass'
-export DB_NAME='my-db-name'
+export DB_USER='<DB_USER_NAME>'
+export DB_PASS='<DB_PASSWORD>'
+export DB_NAME='<DB_NAME>'
 export DB_HOST='127.0.0.1'
 ```
 
@@ -59,11 +59,17 @@ Navigate towards http://localhost:8080 to verify your application is running cor
 
 To run on App Engine Flex, create an App Engine project by following the setup for these [instructions](https://cloud.google.com/appengine/docs/standard/php7/quickstart#before-you-begin).
 
-First, update `app.yaml` with the correct values to pass the environment variables into the runtime.
+First, update [app.yaml](app.yaml) with the correct values to pass the environment variables into the runtime.
 
 In order to use the `sqlsrv` extension, you will need to build a [custom runtime](https://cloud.google.com/appengine/docs/flexible/custom-runtimes/quickstart). The `Dockerfile` in this sample contains a simple example of a custom PHP 7.2 runtime based off of the default App Engine Flex image with the `pdo_sqlsrv` extension installed.
 
-Then, make sure that the service account `service-{PROJECT_NUMBER}>@gae-api-prod.google.com.iam.gserviceaccount.com` has the IAM role `Cloud SQL Client`.
+Then, make sure that the App Engine default service account
+`<PROJECT-ID>@appspot.gserviceaccount.com` has
+the IAM role `Cloud SQL Client`.
+
+Also, make sure that the Cloud Build service account
+`cloudbuild@<PROJECT-ID>.iam.gserviceaccount.com` has
+the IAM role `Cloud SQL Client`.
 
 Next, the following command will deploy the application to your Google Cloud project:
 

cloud_sql/sqlserver/pdo/app.yaml

@@ -19,16 +19,16 @@ env: flex
 # something like https://cloud.google.com/secret-manager/ to help keep secrets
 # secret.
 env_variables:
-  DB_USER: my-db-user
-  DB_PASS: my-db-pass
-  DB_NAME: my-db
-  DB_HOST: 172.17.0.1
+  DB_USER: <YOUR_DB_USER_NAME>
+  DB_PASS: <YOUR_DB_PASSWORD>
+  DB_NAME: <YOUR_DB_NAME>
+  INSTANCE_HOST: 172.17.0.1
 
 beta_settings:
   # The connection name of your instance, available by using
   # 'gcloud beta sql instances describe [INSTANCE_NAME]' or from
   # the Instance details page in the Google Cloud Platform Console.
-  cloud_sql_instances: <MY-PROJECT>:<INSTANCE-REGION>:<INSTANCE_NAME>=tcp:1433
+  cloud_sql_instances: <PROJECT-ID>:<INSTANCE-REGION>:<INSTANCE_NAME>=tcp:1433
 
 # Defaults to "serve index.php" and "serve public/index.php". Can be used to
 # serve a custom PHP front controller (e.g. "serve backend/index.php") or to

cloud_sql/sqlserver/pdo/composer.json

@@ -10,8 +10,8 @@
         "ext-pdo_sqlsrv": "*",
         "slim/slim": "^4.5",
         "slim/twig-view": "^3.1",
-        "pimple/pimple": "^3.3",
-        "guzzlehttp/psr7": "^2.0",
-        "http-interop/http-factory-guzzle": "^1.0"
+        "slim/http": "^1.0",
+        "slim/psr7": "^1.0",
+        "pimple/pimple": "^3.3"
     }
 }

cloud_sql/sqlserver/pdo/index.php

@@ -17,7 +17,7 @@
 
 declare(strict_types=1);
 
-use GuzzleHttp\Psr7;
+use Slim\Psr7\Factory\StreamFactory;
 
 include __DIR__ . '/vendor/autoload.php';
 
@@ -48,7 +48,8 @@
             : 'An error occurred';
     }
 
-    return $response->withBody(Psr7\stream_for($message));
+    $streamFactory = new StreamFactory;
+    return $response->withBody($streamFactory->createStream($message));
 });
 
 $app->run();

cloud_sql/sqlserver/pdo/src/DatabaseTcp.php

@@ -0,0 +1,94 @@
+<?php
+/*
+ * Copyright 2020 Google LLC.
+ *
+ * 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
+ *
+ *     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.
+ */
+
+declare(strict_types=1);
+
+# [START cloud_sql_sqlserver_pdo_connect_tcp]
+namespace Google\Cloud\Samples\CloudSQL\SQLServer;
+
+use PDO;
+use PDOException;
+use RuntimeException;
+use TypeError;
+
+class DatabaseTcp
+{
+    public static function initTcpDatabaseConnection(): PDO
+    {
+        try {
+            // Note: Saving credentials in environment variables is convenient, but not
+            // secure - consider a more secure solution such as
+            // Cloud Secret Manager (https://cloud.google.com/secret-manager) to help
+            // keep secrets safe.
+            $username = getenv('DB_USER'); // e.g. 'your_db_user'
+            $password = getenv('DB_PASS'); // e.g. 'your_db_password'
+            $dbName = getenv('DB_NAME'); // e.g. 'your_db_name'
+            $instanceHost = getenv('INSTANCE_HOST'); // e.g. '127.0.0.1' ('172.17.0.1' for GAE Flex)
+
+            // Connect using TCP
+            $dsn = sprintf(
+                'sqlsrv:server=%s;Database=%s',
+                $instanceHost,
+                $dbName
+            );
+
+            // Connect to the database
+            $conn = new PDO(
+                $dsn,
+                $username,
+                $password,
+                # [START_EXCLUDE]
+                # [START cloud_sql_sqlserver_pdo_timeout]
+                // Here we set the connection timeout to five seconds and ask PDO to
+                // throw an exception if any errors occur.
+                [
+                    PDO::ATTR_TIMEOUT => 5,
+                    PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION,
+                ]
+                # [END cloud_sql_sqlserver_pdo_timeout]
+                # [END_EXCLUDE]
+            );
+        } catch (TypeError $e) {
+            throw new RuntimeException(
+                sprintf(
+                    'Invalid or missing configuration! Make sure you have set ' .
+                        '$username, $password, $dbName, and $instanceHost (for TCP mode). ' .
+                        'The PHP error was %s',
+                    $e->getMessage()
+                ),
+                $e->getCode(),
+                $e
+            );
+        } catch (PDOException $e) {
+            throw new RuntimeException(
+                sprintf(
+                    'Could not connect to the Cloud SQL Database. Check that ' .
+                        'your username and password are correct, that the Cloud SQL ' .
+                        'proxy is running, and that the database exists and is ready ' .
+                        'for use. For more assistance, refer to %s. The PDO error was %s',
+                    'https://cloud.google.com/sql/docs/sqlserver/connect-external-app',
+                    $e->getMessage()
+                ),
+                (int) $e->getCode(),
+                $e
+            );
+        }
+
+        return $conn;
+    }
+}
+# [END cloud_sql_sqlserver_pdo_connect_tcp]

cloud_sql/sqlserver/pdo/src/app.php

@@ -17,7 +17,7 @@
 
 declare(strict_types=1);
 
-use Google\Cloud\Samples\CloudSQL\SQLServer\DBInitializer;
+use Google\Cloud\Samples\CloudSQL\SQLServer\DatabaseTcp;
 use Google\Cloud\Samples\CloudSQL\SQLServer\Votes;
 use Pimple\Container;
 use Pimple\Psr11\Container as Psr11Container;
@@ -26,7 +26,7 @@
 use Slim\Views\TwigMiddleware;
 
 // Create and set the dependency injection container.
-$container = new Container;
+$container = new Container();
 AppFactory::setContainer(new Psr11Container($container));
 
 // add the votes manager to the container.
@@ -36,40 +36,22 @@
 
 // Setup the database connection in the container.
 $container['db'] = function () {
-    # [START cloud_sql_sqlserver_pdo_timeout]
-    // Here we set the connection timeout to five seconds and ask PDO to
-    // throw an exception if any errors occur.
-    $connConfig = [
-        PDO::ATTR_TIMEOUT => 5,
-        PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION
-    ];
-    # [END cloud_sql_sqlserver_pdo_timeout]
-
-    $username = getenv('DB_USER');
-    $password = getenv('DB_PASS');
-    $dbName = getenv('DB_NAME');
-    $dbHost = getenv('DB_HOST');
-
-    if (empty($username = getenv('DB_USER'))) {
-        throw new RuntimeException('Must supply $DB_USER environment variables');
+    if (getenv('DB_USER') === false) {
+        throw new RuntimeException('Must supply $DB_USER environment variable');
     }
-    if (empty($password = getenv('DB_PASS'))) {
-        throw new RuntimeException('Must supply $DB_PASS environment variables');
+    if (getenv('DB_PASS') === false) {
+        throw new RuntimeException('Must supply $DB_PASS environment variable');
     }
-    if (empty($dbName = getenv('DB_NAME'))) {
-        throw new RuntimeException('Must supply $DB_NAME environment variables');
+    if (getenv('DB_NAME') === false) {
+        throw new RuntimeException('Must supply $DB_NAME environment variable');
     }
-    if (empty($dbHost = getenv('DB_HOST'))) {
-        throw new RuntimeException('Must supply $DB_HOST environment variables');
+    if (getenv('INSTANCE_HOST') === false) {
+        throw new RuntimeException(
+            'Must supply $INSTANCE_HOST environment variable'
+        );
     }
 
-    return DBInitializer::initTcpDatabaseConnection(
-        $username,
-        $password,
-        $dbName,
-        $dbHost,
-        $connConfig
-    );
+    return DatabaseTcp::initTcpDatabaseConnection();
 };
 
 // Configure the templating engine.