瓶图片上传到S3只发送HTML [英] Flask image upload to S3 only sends HTML

问题描述

我想创建一个小的应用程序，上传图像到Amazon S3的桶中。我终于能成功上传的的东西的但是当我在S3控制台检查它所有的上传是HTML：

I'm trying to create a small app that uploads images to an Amazon S3 bucket. I was finally able to successfully upload something however when I checked it in the S3 console all that was uploaded was HTML:

＆LT;输入ID =形象NAME =图像类型=文件＆GT;

瓶：

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)

    return iid

@app.route('/', methods = ['GET', 'POST'])
def index():
    form = ImageForm(request.form)
    print 'CHECKING REQUEST'
    if form.validate_on_submit():
        print 'VALID REQUEST'
        image = form.image.data
        s3upload(image)
    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)

我是previously告知，使用 set_contents_from_file 是不正确的，而是使用 set_contents_from_string

I was previously told that using set_contents_from_file was incorrect and instead to use set_contents_from_string

<一个href="http://stackoverflow.com/questions/22336955/flask-attributeerror-uni$c$c-object-has-no-attribute-tell/22337402#22337402">Flask AttributeError的：UNI code'对象有没有属性'告诉'

不过，我觉得这可能是问题。感谢您的帮助。

However I feel like this may be the issue. Thanks for your help.

推荐答案

只有HTML上传成功，因为你使用 set_contents_from_string 方法，该方法仅适用于基于文本的文件和作品< STRONG>不是图片，因为他们不被视为字符串。您应该使用 set_contents_from_file 方法的在文档中提到这里。

Only HTML uploads were successful because you are using set_contents_from_string method which works only for text based files and not images since they are not treated as string. You should use set_contents_from_file method as mentioned in the docs here.

检索文件对象为 request.files ['形象'] ，并把它传递给了 set_contents_from_file 方法

Retrieve the file object as request.files['image'] and pass it on to the set_contents_from_file method.

def s3upload(image, acl='public-read'):
    # do things before
    k.set_contents_from_file(image)
    # do more stuff

@app.route('/', methods = ['GET', 'POST'])
def index():
    form = ImageForm(request.form)
    if form.validate_on_submit():
        s3upload(request.files['image'])
    # do rest of stuff

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