old_contents: import logging
  import os
  
  from flask import Flask, request
  from gcloud import storage
  app = Flask(__name__)
  app.config['DEBUG'] = True
  
  # Note: We don't need to call run() since our application is embedded within
  # the App Engine WSGI application server.
  
  
  @app.route('/')
  #def hello():
  #    """Return a friendly HTTP greeting."""
  def index():
      return """
      Upload Image <br>
  <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():
      """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
      )
  
      # 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):
      logging.exception('An error occurred during a request.')
      return """
      An internal error occurred: <pre>{}</pre>
      See logs for full stacktrace.
      """.format(e), 500
  
  @app.errorhandler(404)
  def page_not_found(e):
      """Return a custom 404 error."""
      return 'Sorry, nothing at this URL.', 404
  
new_contents: import logging
  import os
  
  from flask import Flask, request
  from gcloud import storage
  app = Flask(__name__)
  app.config['DEBUG'] = True
  
  # Note: We don't need to call run() since our application is embedded within
  # the App Engine WSGI application server.
  
  # Configure this environment variable via app.yaml
  CLOUD_STORAGE_BUCKET = os.environ['CLOUD_STORAGE_BUCKET']
  # [end config]
  
  @app.route('/')
  #def hello():
  #    """Return a friendly HTTP greeting."""
  def index():
      return """
      Upload Image <br>
  <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():
      """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
      )
  
      # 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):
      logging.exception('An error occurred during a request.')
      return """
      An internal error occurred: <pre>{}</pre>
      See logs for full stacktrace.
      """.format(e), 500
  
  @app.errorhandler(404)
  def page_not_found(e):
      """Return a custom 404 error."""
      return 'Sorry, nothing at this URL.', 404
  
subject: configure bucket