Question

我尝试将图像从Flask应用上传到Amazon S3存储桶。这是我的代码：

def s3upload(image, acl='public-read'):
    key = app.config['S3_KEY']
    secret = app.config['S3_SECRET']
    bucket = app.config['S3_BUCKET']

    conn = S3Connection(key, secret)
    mybucket = conn.get_bucket(bucket)

    r = redis.StrictRedis(connection_pool = pool)
    iid = r.incr('image')
    now = time.time()
    r.zadd('image:created_on', now, iid)


    k = Key(mybucket)
    k.key = iid
    k.set_contents_from_string(image.read())

    return iid

@app.route('/', methods = ['GET', 'POST'])
def index():
    form = ImageForm(request.form)
    print 'CHECKING REQUEST'
    if request.method == 'POST' and form.image:
        print 'VALID REQUEST'
        image = form.image.read()
        upload = s3upload(image)
        print upload
    else:
        image = None

    r = redis.StrictRedis(connection_pool = pool)
    last_ten = r.zrange('image:created_on', 0, 9)
    print last_ten
    images = []

    key = app.config['S3_KEY']
    secret = app.config['S3_SECRET']
    bucket = app.config['S3_BUCKET']

    conn = S3Connection(key, secret)
    mybucket = conn.get_bucket(bucket)  


    for image in last_ten:

        images.append(mybucket.get_key(image, validate = False))


    return render_template('index.html', form=form, images=images, image=image)

但我在k.set_contents_from_string(image.read())说'FileField' object has no attribute 'read'时收到错误。我准备好的所有内容都表明这是将图片上传到S3的正确方法，我发现了一些他们在.read()对象上调用FileField的示例，但它运行正常。谢谢你的帮助。

Answer 1

FileField个对象具有data属性：

k.set_contents_from_string(image.data.read())

Answer 2

怎么样

import os

filestream = form.image.raw_data[0]
filestream.seek(0, os.SEEK_END)
read_data = filestream.tell()

或

read_data = form.image.raw_data[0].read()

Flask Wtforms FileField对象没有读取属性

2 个答案: