从数据库瓶返回图像创建 [英] flask return image created from database

问题描述

我的图片存储在MongoDB中，我想他们返回给客户端，这里是code是怎么样的：

my images are stored in MongoDB, I'd like to return them to the client, here is how the code is like:

@app.route("/images/<int:pid>.jpg")
def getImage(pid):
    # get image binary from MongoDB, which is bson.Binary type
    return image_binary

不过，似乎我不能直接在瓶返回二进制？

However, it seems that I can't return binary directly in Flask?

下面是我想出现在：

1. 返回到图像二进制文件的BASE64。 - > IE＆LT; 8不支持此
。

2. 创建一个临时文件，然后用由send_file 返回。

1. return the base64 of the image binary. -> IE<8 doesn't support this.
2. create a temp file then return it with send_file.

有没有更好的解决方案？

Is there better solutions ?

推荐答案

设置正确的标题应该做的伎俩：

Setting the correct headers should do the trick:

@app.route("/images/<int:pid>.jpg")
def getImage(pid):
    response = make_response(image_binary)
    response.headers['Content-Type'] = 'image/jpeg'
    response.headers['Content-Disposition'] = 'attachment; filename=img.jpg'
    return response

相关： werkzeug.Headers 并的flask.Response

编辑：我刚看到你可以把一个文件描述符 flask.sendfile ，所以也许：

I've just seen you can pass a file-descriptor to flask.sendfile, so maybe:

return send_file(io.BytesIO(image_binary))

是更好的方法（没有测试过）。

is the better way (haven't tested it).

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