How to link to an image in GridFS in an tag?

问题

We can think about how serving a list of images works in HTML. When we serve a page it includes tags that reference an image and then the browser makes a separate request to get each one. This works well with mongodb. We can just serve the page and insert tags like <img src="/profile_pics/userid"> and then our server just redirects that path to the GridFS file with {"profile_pic": userid}.

Source: http://www.markus-gattol.name/ws/mongodb.html

I have tried:

HTML

<li>
<img src="/static/img/gridfs/download.jpg">
</li>

Bottle Route

# relevant libraries
import gridfs
from bottle import response

@route('/static/img/gridfs/<filename>')
def server_gridfs_img(filename):
  dbname = 'grid_files'
  db = connection[dbname]
  fs = gridfs.GridFS(db)
  thing = fs.get_last_version(filename=filename)
  response.content_type = 'image/jpeg'
  return thing

Error

I get a 404 for https://mysite.com/static/img/gridfs/download.jpg - both when trying to access the image URL directly in a browser, and in the Firebug console error tab when loading the page.

Edit:

Working Code

@route('/gridfs/img/<filename>')
# OR @route('/gridfs/img/<filename:path>')
def server_gridfs_img(filename):
  dbname = 'grid_files'
  db = connection[dbname]
  fs = gridfs.GridFS(db)
  thing = fs.get_last_version(filename=filename)
  response.content_type = 'image/jpeg'
  return thing

Note: Using static instead of another word like gridfs caused the above not to work. I don't know why. All other routes had been commented out when testing.

回答1:

this works for me. First in the Python shell:

>>> import pymongo, gridfs
>>> db = pymongo.MongoClient().my_gridfs
>>> # Read a file I have put in the current directory.
>>> img_contents = open('image.jpg', 'rb').read()
>>> gridfs.GridFS(db).put(img_contents, filename='image.jpg')
ObjectId('52d6c182ca1ce955a9d60f57')

Then in app.py:

import gridfs
import pymongo
from bottle import route, run, template, response

connection = pymongo.MongoClient()

@route('/static/img/gridfs/<filename>')
def gridfs_img(filename):
    dbname = 'my_gridfs'
    db = connection[dbname]
    fs = gridfs.GridFS(db)
    thing = fs.get_last_version(filename=filename)
    response.content_type = 'image/jpeg'
    return thing

run(host='localhost', port=8080)

When I visit http://localhost:8080/static/img/gridfs/image.jpg I see my image in the browser.

I notice you put "https://" in the example URL, are you using a Bottle plugin or a frontend server like Apache?

来源：https://stackoverflow.com/questions/21117166/how-to-link-to-an-image-in-gridfs-in-an-img-tag

标签

mongodb