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July 27, 2010 19:24
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A simple GridFS server built with Flask
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| from flask import Flask, request, redirect, url_for, make_response, abort | |
| from werkzeug import secure_filename | |
| from pymongo import Connection | |
| from pymongo.objectid import ObjectId | |
| from gridfs import GridFS | |
| from gridfs.errors import NoFile | |
| ALLOWED_EXTENSIONS = set(['txt', 'pdf', 'png', 'jpg', 'jpeg', 'gif']) | |
| DB = Connection().gridfs_server_test | |
| FS = GridFS(DB) | |
| app = Flask(__name__) | |
| def allowed_file(filename): | |
| return '.' in filename and \ | |
| filename.rsplit('.', 1)[1] in ALLOWED_EXTENSIONS | |
| @app.route('/', methods=['GET', 'POST']) | |
| def upload_file(): | |
| if request.method == 'POST': | |
| file = request.files['file'] | |
| if file and allowed_file(file.filename): | |
| filename = secure_filename(file.filename) | |
| oid = FS.put(file, content_type=file.content_type, filename=filename) | |
| return redirect(url_for('serve_gridfs_file', oid=str(oid))) | |
| return ''' | |
| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <title>Upload new file</title> | |
| </head> | |
| <body> | |
| <h1>Upload new file</h1> | |
| <form action="" method="post" enctype="multipart/form-data"> | |
| <p><input type="file" name="file"></p> | |
| <p><input type="submit" value="Upload"></p> | |
| </form> | |
| <a href="%s">All files</a> | |
| </body> | |
| </html> | |
| ''' % url_for('list_gridfs_files') | |
| @app.route('/files') | |
| def list_gridfs_files(): | |
| files = [FS.get_last_version(file) for file in FS.list()] | |
| file_list = "\n".join(['<li><a href="%s">%s</a></li>' % \ | |
| (url_for('serve_gridfs_file', oid=str(file._id)), file.name) \ | |
| for file in files]) | |
| return ''' | |
| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <title>Files</title> | |
| </head> | |
| <body> | |
| <h1>Files</h1> | |
| <ul> | |
| %s | |
| </ul> | |
| <a href="%s">Upload new file</a> | |
| </body> | |
| </html> | |
| ''' % (file_list, url_for('upload_file')) | |
| @app.route('/files/<oid>') | |
| def serve_gridfs_file(oid): | |
| try: | |
| file = FS.get(ObjectId(oid)) | |
| response = make_response(file.read()) | |
| response.mimetype = file.content_type | |
| return response | |
| except NoFile: | |
| abort(404) |
instead of reading the file into memory you can directly pass it to the response .. like
from werkzeug import Response
....
@frontend.route('/files/<oid>')
def serve_gridfs_file(oid):
try:
file = FS.get(ObjectId(oid))
return Response(file, mimetype=file.content_type, direct_passthrough=True)
except NoFile:
abort(404)
this will need much less memory since the file is not read into memory
You can also compile Nginx with the GridFS module and serve files directly from Nginx. As of the time of this comment, I've compiled Nginx 1.3.5 with GridFS module 0.8 and am using MongoDB 2.0.7.
A more up to date example is available at https://gist.github.com/kevgathuku/51e30f08a552084b1130
@frontend.route('/files/')
def serve_gridfs_file(oid):
try:
file = FS.get(ObjectId(oid))
return Response(file, mimetype=file.content_type, direct_passthrough=True)
except NoFile:
abort(404)
true
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see http://github.com/RedBeard0531/python-gridfs-server/blob/master/gridfs_server.py for a more efficient way to serve files