python - 将文件上传到 Google Cloud 并出现 Python 3 问题

Question

我有一个 Android 应用程序，它将通过 HTTP 请求发送视频文件。但是，当我尝试发送文件时，Google Cloud 会出现错误。我正在使用 Python 3。

倒数第二行有问题blob.upload_from_filename(filename)，我想知道如何解决这个问题。

这是代码:

import os
from google.cloud import storage
from flask import Flask, flash, request, redirect, url_for
from werkzeug.utils import secure_filename
bucket_name = 'Censored.appspot.com'
ALLOWED_EXTENSIONS = set(['txt', 'pdf', 'png', 'jpg', 'jpeg', 'gif', 'mp4'])

app = Flask(__name__)
app.config['UPLOAD_FOLDER'] = UPLOAD_FOLDER
app.config['SECRET_KEY'] = "TESTSTRING"

def allowed_file(filename):
    return '.' in filename and \
           filename.rsplit('.', 1)[1].lower() in ALLOWED_EXTENSIONS

@app.route('/', methods=['GET', 'POST'])
def upload_file():
    if request.method == 'POST':
        if 'file' not in request.files:
            flash('No file part')
            return redirect(request.url)
        file = request.files['file']
        if file.filename == '':
            flash('No selected file')
            return redirect(request.url)
        if file and allowed_file(file.filename):
            filename = secure_filename(file.filename)
            filepath = '/{}/{}'.format(bucket_name, filename)
            storage_client = storage.Client()
            bucket = storage_client.get_bucket(bucket_name)
            blob = storage.Blob(filename, bucket)
            blob.upload_from_filename(filename)
    return "Hello World!"

这是上传时出现的错误:

  Traceback (most recent call last):


File "", line 1
        Traceback (most recent call last): 
File "/env/lib/python3.6/site-packages/flask/app.py", 
line 2292, in wsgi_app response = self.full_dispatch_request() 
File "/env/lib/python3.6/site-packages/flask/app.py", 
line 1815, in full_dispatch_request rv = self.handle_user_exception(e) 
File "/env/lib/python3.6/site-packages/flask/app.py", 
line 1718, in handle_user_exception reraise(exc_type, exc_value, tb) 
File "/env/lib/python3.6/site-packages/flask/_compat.py", 
line 35, in reraise raise value File "/env/lib/python3.6/site-packages/flask/app.py", 
line 1813, in full_dispatch_request rv = self.dispatch_request() 
File "/env/lib/python3.6/site-packages/flask/app.py", 
line 1799, in dispatch_request return self.view_functions[rule.endpoint](**req.view_args) 
File "/home/vmagent/app/__init__.py", 
line 32, in upload_file blob.upload_from_filename(filename) 
File "/env/lib/python3.6/site-packages/google/cloud/storage/blob.py", 
line 1021, in upload_from_filename with open(filename, 'rb') as file_obj: 
FileNotFoundError: [Errno 2] No such file or directory: '377bdc67c74336b6_101.mp4'
                             ^
    SyntaxError: invalid syntax

作为旁注；在我的本地 Flask 服务器中我使用:

    file.save(os.path.join(app.config['UPLOAD_FOLDER'], filename))

这当然在 Google 云中不起作用，因为它使用存储桶。

我在这里感到绝望。我认为我缺少一些有关 Google Cloud 的常识。

Answer 1

您错过了实际保存文件的步骤:

filename = secure_filename(file.filename)
filepath = os.path.join(app.config['UPLOAD_FOLDER'], filename)
file.save(filepath)

对于 Google App Engine，UPLOAD_FOLDER 必须是 /tmp。

保存文件后，您可以将其上传到 Google 云端存储:

name = '/{}/{}'.format(bucket_name, filename)
storage_client = storage.Client()
bucket = storage_client.get_bucket(bucket_name)
blob = storage.Blob(name, bucket)
blob.upload_from_filename(filepath)