Flask Wtforms FileField object has no attribute read

Question

I'm trying to upload images to an Amazon S3 bucket from a Flask app. Here is my code:

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)

However I get an error at k.set_contents_from_string(image.read()) saying 'FileField' object has no attribute 'read' . Everything I've ready has indicated this is the proper way to upload an image to S3 and I've found several examples where they call .read() on a FileField object and it works fine. Thanks for your help.

Answer 1

FileField对象具有data属性：

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

Answer 2

How about

import os

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

or

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