Utilizza Cloud Storage

Puoi utilizzare Cloud Storage per archiviare e pubblicare file, ad esempio: filmati, immagini o altri contenuti statici.

Questo documento descrive come utilizzare Librerie client di Cloud per Cloud Storage nella tua app per archiviare e recuperare i dati

Prima di iniziare

  • Segui le istruzioni riportate in Configurare l'ambiente di sviluppo. per configurare l'ambiente e il progetto e comprendere sono strutturate in App Engine. Annota e salva il progetto perché ti servirà per eseguire l'applicazione di esempio descritta in documento.

  • Assicurati di creare un bucket Cloud Storage per la tua applicazione richiamando il seguente comando:

    gcloud storage buckets create gs://<var>YOUR_BUCKET_NAME</var>

  • Rendi il bucket leggibile pubblicamente in modo che possa pubblicare file:

    gcloud storage buckets add-iam-policy-binding gs://<var>YOUR_BUCKET_NAME</var> --member=allUsers --role=roles/storage.objectViewer

Scarica l'esempio

Vai

Per clonare il repository:

git clone https://github.com/GoogleCloudPlatform/golang-samples.git
cd golang-samples/appengine_flexible/storage

Java

Per clonare il repository:

versione 11/17 

  git clone https://github.com/GoogleCloudPlatform/java-docs-samples
  cd java-docs-samples/flexible/java-11/cloudstorage

versione 8 

  git clone https://github.com/GoogleCloudPlatform/java-docs-samples
  cd java-docs-samples/flexible/java-8/cloudstorage

Node.js

Per clonare il repository:

git clone https://github.com/GoogleCloudPlatform/nodejs-docs-samples/
cd nodejs-docs-samples/appengine/storage/flexible

PHP

Per clonare il repository:

git clone https://github.com/GoogleCloudPlatform/php-docs-samples
cd php-docs-samples/appengine/flexible/storage

Python

Per clonare il repository:

git clone https://github.com/GoogleCloudPlatform/python-docs-samples
cd python-docs-samples/appengine/flexible/storage

Ruby

Per clonare il repository:

git clone https://github.com/GoogleCloudPlatform/ruby-docs-samples
cd ruby-docs-samples/appengine/flexible/storage/

.NET

  1. Scarica l'app di esempio ed estrarlo.

  2. Se utilizzi la riga di comando, passa alla seguente directory dell'app:

        dotnet-docs-samples\appengine\flexible\CloudStorage\CloudStorage.Sample

Per eseguire l'applicazione in locale, configura un account di servizio e scarica le credenziali:

  1. Apri l'elenco delle credenziali nella console Google Cloud.

    Apri l'elenco delle credenziali

  2. Fai clic su Crea credenziali.

  3. Seleziona Chiave account di servizio.

    Si apre la finestra Crea chiave account di servizio.

  4. Fai clic sull'elenco Account di servizio e seleziona Compute Account di servizio predefinito del motore.

  5. Seleziona JSON per Tipo di chiave.

  6. Fai clic su Crea.

    Viene visualizzata la finestra Nuova chiave privata e la finestra viene scaricata automaticamente.

  7. Fai clic su Chiudi.

Modifica la configurazione del progetto e installa le dipendenze

Vai

In app.yaml, imposta GCLOUD_STORAGE_BUCKET. Questo valore corrisponde al valore del bucket Cloud Storage che hai creato in precedenza.

# Copyright 2019 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
#
#     https://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.

runtime: go
env: flex

runtime_config:
  operating_system: ubuntu22
  runtime_version: 1.21

automatic_scaling:
  min_num_instances: 1

env_variables:
  GCLOUD_STORAGE_BUCKET: your-bucket-name

Java

In app.yaml, imposta BUCKET_NAME al Cloud Storage che hai creato in precedenza per il tuo progetto.

versione 11/17 

runtime: java
env: flex
runtime_config:
  operating_system: ubuntu18
  runtime_version: 11
handlers:
- url: /.*
  script: this field is required, but ignored

env_variables:
  BUCKET_NAME: YOUR-BUCKET-NAME

versione 8 

#  Copyright 2023 Google Inc.
#
#  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.

runtime: java
env: flex

handlers:
- url: /.*
  script: this field is required, but ignored

env_variables:
  BUCKET_NAME: YOUR-BUCKET-NAME

In pom.xml, imposta com.google.cloud come dipendenza e specifica google-cloud-storage come arteID per la dipendenza. questo fornisce le funzioni per utilizzare Cloud Storage.

versione 11/17 

<!--  Using libraries-bom to manage versions.
See https://github.com/GoogleCloudPlatform/cloud-opensource-java/wiki/The-Google-Cloud-Platform-Libraries-BOM -->
<dependencyManagement>
  <dependencies>
    <dependency>
      <groupId>com.google.cloud</groupId>
      <artifactId>libraries-bom</artifactId>
      <version>26.32.0</version>
      <type>pom</type>
      <scope>import</scope>
    </dependency>
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-dependencies</artifactId>
      <version>${spring.boot.version}</version>
      <type>pom</type>
      <scope>import</scope>
    </dependency>
  </dependencies>
</dependencyManagement>

<dependencies>
  <dependency>
    <groupId>com.google.cloud</groupId>
    <artifactId>google-cloud-storage</artifactId>
  </dependency>
  <dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-web</artifactId>
  </dependency>
  <dependency>
    <groupId>javax.servlet</groupId>
    <artifactId>javax.servlet-api</artifactId>
    <type>jar</type>
    <scope>provided</scope>
  </dependency>
  <dependency>
    <groupId>org.junit.vintage</groupId>
    <artifactId>junit-vintage-engine</artifactId>
    <scope>test</scope>
  </dependency>
  <dependency>
    <groupId>org.junit-pioneer</groupId>
    <artifactId>junit-pioneer</artifactId>
    <version>2.2.0</version>
    <scope>test</scope>
  </dependency>
  <dependency>
    <groupId>org.mockito</groupId>
    <artifactId>mockito-inline</artifactId>
    <scope>test</scope>
  </dependency>
  <dependency>
    <groupId>org.mockito</groupId>
    <artifactId>mockito-junit-jupiter</artifactId>
    <scope>test</scope>
  </dependency>
  <dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-test</artifactId>
    <scope>test</scope>
  </dependency>

</dependencies>

versione 8 

<!--  Using libraries-bom to manage versions.
See https://github.com/GoogleCloudPlatform/cloud-opensource-java/wiki/The-Google-Cloud-Platform-Libraries-BOM -->
<dependencyManagement>
  <dependencies>
    <dependency>
      <groupId>com.google.cloud</groupId>
      <artifactId>libraries-bom</artifactId>
      <version>26.28.0</version>
      <type>pom</type>
      <scope>import</scope>
    </dependency>
  </dependencies>
</dependencyManagement>

<dependencies>
  <dependency>
    <groupId>com.google.cloud</groupId>
    <artifactId>google-cloud-storage</artifactId>
  </dependency>
</dependencies>

Node.js

In app.yaml, aggiungi il tuo ID progetto all'ambiente GOOGLE_CLOUD_PROJECT valore. Quindi imposta il valore dell'ambiente GCLOUD_STORAGE_BUCKET sul nome di al bucket Cloud Storage creato in precedenza.

runtime: nodejs
env: flex
runtime_config:
  operating_system: ubuntu22

env_variables:
  GCLOUD_STORAGE_BUCKET: YOUR_BUCKET_NAME

In package.json, aggiungi @google-cloud/storage come dipendenza, che fornisce le funzioni per utilizzare Cloud Storage.

{
  "name": "appengine-storage",
  "description": "Node.js Google Cloud Storage sample for Google App Engine",
  "scripts": {
    "start": "node app.js",
    "test": "c8 mocha -p -j 2 system-test/*.test.js --exit --timeout=30000"
  },
  "engines": {
    "node": ">=16.0.0"
  },
  "dependencies": {
    "@google-cloud/storage": "^7.0.0",
    "express": "^4.18.2",
    "multer": "^1.4.5-lts.1",
    "pug": "^3.0.2"
  },
  "devDependencies": {
    "@types/express": "^4.17.17",
    "@types/multer": "^1.4.7",
    "@types/proxyquire": "^1.3.28",
    "@types/supertest": "^2.0.12",
    "@types/uuid": "^9.0.1",
    "c8": "^8.0.0",
    "mocha": "^10.2.0",
    "proxyquire": "^2.1.3",
    "supertest": "^6.3.3",
    "uuid": "^9.0.0"
  }
}

Visualizza il file README.md per istruzioni sull'esecuzione e i test in locale.

PHP

In app.yaml, imposta CLOUD_STORAGE_BUCKET; questo valore è del bucket Cloud Storage che hai creato in precedenza.

env_variables:
  GOOGLE_STORAGE_BUCKET: "your-bucket-name"

In composer.json, tieni presente che devi includere la libreria client di Cloud, perché fornisce funzioni Cloud Storage.

{
    "require": {
        "slim/slim": "^4.0",
        "slim/psr7": "^1.3",
        "google/cloud-storage": "^1.0",
        "php-di/slim-bridge": "^3.1"
    }
}

Python

In app.yaml, imposta GOOGLE_STORAGE_BUCKET; questo valore è del bucket Cloud Storage che hai creato in precedenza.

env_variables:
  CLOUD_STORAGE_BUCKET: [your-bucket-name]

In requirements.txt, tieni presente che devi includere google-cloud-storage, perché fornisce Cloud Storage funzioni.

Flask==3.0.3
google-cloud-storage==2.9.0
gunicorn==22.0.0

Ruby

In app.yaml, imposta GCLOUD_STORAGE_BUCKET al Cloud Storage che hai creato in precedenza per il tuo progetto.

runtime: ruby
env: flex
entrypoint: bundle exec ruby app.rb

runtime_config:
  operating_system: ubuntu22

env_variables:
  GOOGLE_CLOUD_STORAGE_BUCKET: <your-bucket-name>

Tieni presente che devi includere la libreria gcloud in Gemfile per utilizzare le funzioni di Cloud Storage.

source "https://rubygems.org"

gem "google-cloud-storage"
gem "sinatra"

.NET

Nel file app.yaml , imposta TEST_GOOGLE_BUCKET_NAME su Cloud Storage creato in precedenza per il progetto.

env_variables:
  TEST_GOOGLE_BUCKET_NAME: [your-bucket-name]

Codice dell'applicazione

Vai

L'applicazione di esempio presenta una pagina web in cui viene chiesto all'utente di fornire un file in Cloud Storage. Quando l'utente seleziona un file e fa clic invia, il gestore di caricamento scrive il file nel bucket Cloud Storage utilizzando Cloud Storage NewWriter personalizzata.

Tieni presente che per recuperare questo file da Cloud Storage, dovrai e specificare il nome del bucket e del file. Dovresti archiviare questi valori nel tuo per uso futuro.

// Copyright 2019 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
//
//     https://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.


// Sample storage demonstrates use of the cloud.google.com/go/storage package from App Engine flexible environment.
package main

import (
	"context"
	"fmt"
	"io"
	"log"
	"net/http"
	"net/url"
	"os"

	"cloud.google.com/go/storage"
	"google.golang.org/appengine"
)

var (
	storageClient *storage.Client

	// Set this in app.yaml when running in production.
	bucket = os.Getenv("GCLOUD_STORAGE_BUCKET")
)

func main() {
	ctx := context.Background()

	var err error
	storageClient, err = storage.NewClient(ctx)
	if err != nil {
		log.Fatal(err)
	}

	http.HandleFunc("/", formHandler)
	http.HandleFunc("/upload", uploadHandler)

	appengine.Main()
}

func uploadHandler(w http.ResponseWriter, r *http.Request) {
	if r.Method != "POST" {
		http.Error(w, "", http.StatusMethodNotAllowed)
		return
	}

	ctx := appengine.NewContext(r)

	f, fh, err := r.FormFile("file")
	if err != nil {
		msg := fmt.Sprintf("Could not get file: %v", err)
		http.Error(w, msg, http.StatusBadRequest)
		return
	}
	defer f.Close()

	sw := storageClient.Bucket(bucket).Object(fh.Filename).NewWriter(ctx)
	if _, err := io.Copy(sw, f); err != nil {
		msg := fmt.Sprintf("Could not write file: %v", err)
		http.Error(w, msg, http.StatusInternalServerError)
		return
	}

	if err := sw.Close(); err != nil {
		msg := fmt.Sprintf("Could not put file: %v", err)
		http.Error(w, msg, http.StatusInternalServerError)
		return
	}

	u, _ := url.Parse("/" + bucket + "/" + sw.Attrs().Name)

	fmt.Fprintf(w, "Successful! URL: https://storage.googleapis.com%s", u.EscapedPath())
}

func formHandler(w http.ResponseWriter, r *http.Request) {
	fmt.Fprint(w, formHTML)
}

const formHTML = `<!DOCTYPE html>
<html>
  <head>
    <title>Storage</title>
    <meta charset="utf-8">
  </head>
  <body>
    <form method="POST" action="/upload" enctype="multipart/form-data">
      <input type="file" name="file">
      <input type="submit">
    </form>
  </body>
</html>`

Java

L'applicazione di esempio presenta una pagina web in cui viene chiesto all'utente di fornire un file in Cloud Storage. Quando l'utente seleziona un file e fa clic invia, il gestore di richieste doPost scrive il file nel bucket Cloud Storage utilizzando Storage.create

Tieni presente che per recuperare questo file da Cloud Storage, dovrai e specificare il nome del bucket e del file. Dovresti archiviare questi valori nel tuo per uso futuro.

versione 11/17 

@SuppressWarnings("serial")
@WebServlet(name = "upload", value = "/upload")
@MultipartConfig()
public class UploadServlet extends HttpServlet {

  private static final String BUCKET_NAME =
      System.getenv().getOrDefault("BUCKET_NAME", "my-test-bucket");
  private static Storage storage = null;

  public UploadServlet() {
    storage = StorageOptions.getDefaultInstance().getService();
  }

  @Override
  public void doPost(HttpServletRequest req, HttpServletResponse resp)
      throws IOException, ServletException {
    final Part filePart = req.getPart("file");
    final String fileName = filePart.getSubmittedFileName();
    // Modify access list to allow all users with link to read file
    List<Acl> acls = new ArrayList<>();
    acls.add(Acl.of(Acl.User.ofAllUsers(), Acl.Role.READER));
    // the inputstream is closed by default, so we don't need to close it here
    Blob blob =
        storage.create(
            BlobInfo.newBuilder(BUCKET_NAME, fileName).setAcl(acls).build(),
            filePart.getInputStream());

    // return the public download link
    resp.getWriter().print(blob.getMediaLink());
  }
}

versione 8 

@SuppressWarnings("serial")
@WebServlet(name = "upload", value = "/upload")
@MultipartConfig()
public class UploadServlet extends HttpServlet {

  private static final String BUCKET_NAME = System.getenv("BUCKET_NAME");
  private static Storage storage = null;

  @Override
  public void init() {
    storage = StorageOptions.getDefaultInstance().getService();
  }

  @Override
  public void doPost(HttpServletRequest req, HttpServletResponse resp)
      throws IOException, ServletException {
    final Part filePart = req.getPart("file");
    final String fileName = filePart.getSubmittedFileName();

    // Modify access list to allow all users with link to read file
    List<Acl> acls = new ArrayList<>();
    acls.add(Acl.of(Acl.User.ofAllUsers(), Acl.Role.READER));
    // the inputstream is closed by default, so we don't need to close it here
    Blob blob =
        storage.create(
            BlobInfo.newBuilder(BUCKET_NAME, fileName).setAcl(acls).build(),
            filePart.getInputStream());

    // return the public download link
    resp.getWriter().print(blob.getMediaLink());
  }
}

Node.js

L'applicazione di esempio presenta una pagina web in cui viene chiesto all'utente di fornire un file in Cloud Storage. Quando l'utente seleziona un file e fa clic invia, il gestore di caricamento carica i contenuti del file in un blob e li scrive di archiviazione ideale in Cloud Storage.

Tieni presente che, dopo il caricamento del file su Cloud Storage, l'URL pubblico a questo file, che puoi utilizzare per pubblicare il file direttamente di archiviazione ideale in Cloud Storage. Devi archiviare questo valore nella tua app per un uso futuro.

const {format} = require('util');
const express = require('express');
const Multer = require('multer');

// By default, the client will authenticate using the service account file
// specified by the GOOGLE_APPLICATION_CREDENTIALS environment variable and use
// the project specified by the GOOGLE_CLOUD_PROJECT environment variable. See
// https://github.com/GoogleCloudPlatform/google-cloud-node/blob/master/docs/authentication.md
// These environment variables are set automatically on Google App Engine
const {Storage} = require('@google-cloud/storage');

// Instantiate a storage client
const storage = new Storage();

const app = express();
app.set('view engine', 'pug');

// This middleware is available in Express v4.16.0 onwards
app.use(express.json());

// Multer is required to process file uploads and make them available via
// req.files.
const multer = Multer({
  storage: Multer.memoryStorage(),
  limits: {
    fileSize: 5 * 1024 * 1024, // no larger than 5mb, you can change as needed.
  },
});

// A bucket is a container for objects (files).
const bucket = storage.bucket(process.env.GCLOUD_STORAGE_BUCKET);

// Display a form for uploading files.
app.get('/', (req, res) => {
  res.render('form.pug');
});

// Process the file upload and upload to Google Cloud Storage.
app.post('/upload', multer.single('file'), (req, res, next) => {
  if (!req.file) {
    res.status(400).send('No file uploaded.');
    return;
  }

  // Create a new blob in the bucket and upload the file data.
  const blob = bucket.file(req.file.originalname);
  const blobStream = blob.createWriteStream();

  blobStream.on('error', err => {
    next(err);
  });

  blobStream.on('finish', () => {
    // The public URL can be used to directly access the file via HTTP.
    const publicUrl = format(
      `https://storage.googleapis.com/${bucket.name}/${blob.name}`
    );
    res.status(200).send(publicUrl);
  });

  blobStream.end(req.file.buffer);
});

const PORT = parseInt(process.env.PORT) || 8080;
app.listen(PORT, () => {
  console.log(`App listening on port ${PORT}`);
  console.log('Press Ctrl+C to quit.');
});

PHP

L'applicazione di esempio presenta una pagina web in cui viene chiesto all'utente di fornire un file in Cloud Storage. Quando l'utente seleziona un file e fa clic invia, il gestore di caricamento carica i contenuti del file in un blob e li scrive di archiviazione ideale in Cloud Storage.

Tieni presente che, dopo il caricamento del file su Cloud Storage, l'URL pubblico a questo file, che puoi utilizzare per pubblicare il file direttamente di archiviazione ideale in Cloud Storage. Devi archiviare questo valore nella tua app per un uso futuro.

use DI\Container;
use Google\Cloud\Storage\StorageClient;
use Psr\Http\Message\ServerRequestInterface as Request;
use Psr\Http\Message\ResponseInterface as Response;
use Slim\Factory\AppFactory;

// Create App
AppFactory::setContainer($container = new Container());
$app = AppFactory::create();

// Display errors
$app->addErrorMiddleware(true, true, true);

$container = $app->getContainer();

$app->get('/', function (Request $request, Response $response) use ($container) {
    /** @var Google\Cloud\StorageClient */
    $storage = $container->get('storage');
    $bucketName = $container->get('bucket_name');
    $objectName = $container->get('object_name');
    $bucket = $storage->bucket($bucketName);
    $object = $bucket->object($objectName);
    $content = $object->exists() ? $object->downloadAsString() : '';
    $escapedContent = htmlspecialchars($content);
    $response->getBody()->write(<<<EOF
    <h1>Storage Example</h1>
    <h3>Write [<a href="https://cloud.google.com/appengine/docs/flexible/php/using-cloud-storage">docs</a>]:</h3>
    <form action="/write" method="post">
        Some file content:<br />
        <textarea name="content"></textarea><br />
        <input type="submit" />
    </form>
EOF
    );
    if ($content) {
        $response->getBody()->write(
            "<p><strong>Your content:</strong><p><p>$escapedContent</p>"
        );
    }
    return $response;
});

/**
 * Write to a Storage bucket.
 * @see https://cloud.google.com/appengine/docs/flexible/php/using-cloud-storage
 */
$app->post('/write', function (Request $request, Response $response) use ($container) {
    /** @var Google\Cloud\StorageClient */
    $storage = $container->get('storage');
    $bucketName = $container->get('bucket_name');
    $objectName = $container->get('object_name');
    parse_str((string) $request->getBody(), $postData);
    $metadata = ['contentType' => 'text/plain'];
    $storage->bucket($bucketName)->upload($postData['content'] ?? '', [
        'name' => $objectName,
        'metadata' => $metadata,
    ]);
    return $response
        ->withStatus(302)
        ->withHeader('Location', '/');
});

$container->set('storage', function () use ($container) {
    $projectId = $container->get('project_id');
    $storage = new StorageClient([
        'projectId' => $projectId
    ]);
    return $storage;
});

Python

L'applicazione di esempio presenta una pagina web in cui viene chiesto all'utente di fornire un file in Cloud Storage. Quando l'utente seleziona un file e fa clic invia, il gestore di caricamento carica i contenuti del file in un blob e la scrive nel file Cloud Storage bucket.

Tieni presente che, dopo il caricamento del file su Cloud Storage, l'URL pubblico a questo file, che puoi utilizzare per pubblicare il file direttamente di archiviazione ideale in Cloud Storage. Devi archiviare questo valore nella tua app per un uso futuro.

from __future__ import annotations

import logging
import os

from flask import Flask, request
from google.cloud import storage

app = Flask(__name__)

# Configure this environment variable via app.yaml
CLOUD_STORAGE_BUCKET = os.environ["CLOUD_STORAGE_BUCKET"]


@app.route("/")
def index() -> str:
    return """
<form method="POST" action="/upload" enctype="multipart/form-data">
    <input type="file" name="file">
    <input type="submit">
</form>
"""


@app.route("/upload", methods=["POST"])
def upload() -> str:
    """Process the uploaded file and upload it to Google Cloud Storage."""
    uploaded_file = request.files.get("file")

    if not uploaded_file:
        return "No file uploaded.", 400

    # Create a Cloud Storage client.
    gcs = storage.Client()

    # Get the bucket that the file will be uploaded to.
    bucket = gcs.get_bucket(CLOUD_STORAGE_BUCKET)

    # Create a new blob and upload the file's content.
    blob = bucket.blob(uploaded_file.filename)

    blob.upload_from_string(
        uploaded_file.read(), content_type=uploaded_file.content_type
    )

    # Make the blob public. This is not necessary if the
    # entire bucket is public.
    # See https://cloud.google.com/storage/docs/access-control/making-data-public.
    blob.make_public()

    # The public URL can be used to directly access the uploaded file via HTTP.
    return blob.public_url


@app.errorhandler(500)
def server_error(e: Exception | int) -> str:
    logging.exception("An error occurred during a request.")
    return (
        """
    An internal error occurred: <pre>{}</pre>
    See logs for full stacktrace.
    """.format(
            e
        ),
        500,
    )


if __name__ == "__main__":
    # This is used when running locally. Gunicorn is used to run the
    # application on Google App Engine. See entrypoint in app.yaml.
    app.run(host="127.0.0.1", port=8080, debug=True)

Ruby

L'applicazione di esempio presenta una pagina web in cui viene chiesto all'utente di fornire un file in Cloud Storage. Quando l'utente seleziona un file e fa clic invia, il gestore di caricamento carica i contenuti del file in un blob e li scrive di archiviazione ideale in Cloud Storage.

Tieni presente che, dopo il caricamento del file su Cloud Storage, l'URL pubblico a questo file, che puoi utilizzare per pubblicare il file direttamente di archiviazione ideale in Cloud Storage. Devi archiviare questo valore nella tua app per un uso futuro.

require "sinatra"
require "google/cloud/storage"

storage = Google::Cloud::Storage.new
bucket  = storage.bucket ENV["GOOGLE_CLOUD_STORAGE_BUCKET"]

get "/" do
  # Present the user with an upload form
  '
    <form method="POST" action="/upload" enctype="multipart/form-data">
      <input type="file" name="file">
      <input type="submit" value="Upload">
    </form>
  '
end

post "/upload" do
  file_path = params[:file][:tempfile].path
  file_name = params[:file][:filename]

  # Upload file to Google Cloud Storage bucket
  file = bucket.create_file file_path, file_name, acl: "public"

  # The public URL can be used to directly access the uploaded file via HTTP
  file.public_url
end

.NET

L'applicazione di esempio presenta una pagina web in cui viene chiesto all'utente di fornire un file in Cloud Storage. Quando l'utente seleziona un file e fa clic invia, il gestore di caricamento carica i contenuti del file in un blob e li scrive di archiviazione ideale in Cloud Storage.

Tieni presente che, dopo il caricamento del file su Cloud Storage, l'URL pubblico a questo file, che puoi utilizzare per pubblicare il file direttamente di archiviazione ideale in Cloud Storage. Devi archiviare questo valore nella tua app per un uso futuro.

    public class HomeController : Controller
    {
        // Contains the bucket name and object name
        readonly CloudStorageOptions _options;
        // The Google Cloud Storage client.
        readonly StorageClient _storage;

        public HomeController(CloudStorageOptions options)
        {
            _options = options;
            _storage = StorageClient.Create();
        }

        [HttpGet]
        public async Task<IActionResult> Index()
        {
            var model = new HomeIndex();
            if (new string[] { null, "", "your-google-bucket-name" }
                .Contains(_options.BucketName))
            {
                model.MissingBucketName = true;
                return View(model);
            }
            try
            {
                // Get the storage object.
                var storageObject =
                    await _storage.GetObjectAsync(_options.BucketName, _options.ObjectName);
                // Get a direct link to the storage object.
                model.MediaLink = storageObject.MediaLink;
                // Download the storage object.
                MemoryStream m = new MemoryStream();
                await _storage.DownloadObjectAsync(
                    _options.BucketName, _options.ObjectName, m);
                m.Seek(0, SeekOrigin.Begin);
                byte[] content = new byte[m.Length];
                m.Read(content, 0, content.Length);
                model.Content = Encoding.UTF8.GetString(content);
            }
            catch (GoogleApiException e)
            when (e.HttpStatusCode == System.Net.HttpStatusCode.NotFound)
            {
                // Does not exist yet.  No problem.
            }
            return View(model);
        }

        [HttpPost]
        public async Task<IActionResult> Index(Form sendForm)
        {
            var model = new HomeIndex();
            // Take the content uploaded in the form and upload it to
            // Google Cloud Storage.
            await _storage.UploadObjectAsync(
                _options.BucketName, _options.ObjectName, "text/plain",
                new MemoryStream(Encoding.UTF8.GetBytes(sendForm.Content)));
            model.Content = sendForm.Content;
            model.SavedNewContent = true;
            var storageObject =
                await _storage.GetObjectAsync(_options.BucketName, _options.ObjectName);
            model.MediaLink = storageObject.MediaLink;
            return View(model);
        }

Per ulteriori informazioni

Per informazioni complete su Cloud Storage, consulta documentazione di Cloud Storage.