mirror of
https://github.com/kennethreitz-archive/django-mediasync.git
synced 2026-06-20 23:40:58 +00:00
Jeremy Carbaugh
75 lines
2.5 KiB
Python
75 lines
2.5 KiB
Python
from boto.s3.connection import S3Connection
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from boto.s3.key import Key
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from django.conf import settings
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from mediasync.utils import cssmin, jsmin
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import base64
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import datetime
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import hashlib
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import zlib
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TYPES_TO_COMPRESS = (
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"application/javascript",
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"application/x-javascript",
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"application/xml",
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"text/css",
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"text/html",
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"text/plain",
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)
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EXPIRATION_DAYS = getattr(settings, "MEDIASYNC_EXPIRATION_DAYS", 365)
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class Client(object):
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def __init__(self, key, secret, bucket_name, prefix=''):
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self._conn = S3Connection(key, secret)
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self._bucket = self._conn.create_bucket(bucket_name)
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self._prefix = prefix
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self._entries = { }
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for entry in self._bucket.list(self._prefix):
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self._entries[entry.key] = entry.etag.strip('"')
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def put(self, filedata, content_type, remote_path, force=False):
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now = datetime.datetime.utcnow()
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then = now + datetime.timedelta(EXPIRATION_DAYS)
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expires = then.strftime("%a, %d %b %Y %H:%M:%S GMT")
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# check to see if cssmin or jsmin should be run
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if content_type == "text/css":
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filedata = cssmin.cssmin(filedata)
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elif content_type == "text/javascript":
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filedata = jsmin.jsmin(filedata)
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# create initial set of headers
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headers = {
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"x-amz-acl": "public-read",
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"Content-Type": content_type,
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"Expires": expires,
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"Cache-Control": 'max-age %d' % (EXPIRATION_DAYS * 24 * 3600),
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}
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# check to see if file should be gzipped based on content_type
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# also check to see if filesize is greater than 1kb
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if content_type in TYPES_TO_COMPRESS and len(filedata) > 1024:
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filedata = zlib.compress(filedata)[2:-4] # strip zlib header and checksum
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headers["Content-Encoding"] = "deflate"
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# calculate md5 digest of filedata
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checksum = hashlib.md5(filedata)
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hexdigest = checksum.hexdigest()
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b64digest = base64.b64encode(checksum.digest())
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# check to see if local file has changed from what is on S3
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etag = self._entries.get(remote_path, '')
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if force or etag != hexdigest:
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# upload file
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key = Key(self._bucket)
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key.key = remote_path
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key.set_contents_from_string(filedata, headers=headers, md5=(hexdigest, b64digest))
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self._entries[remote_path] = etag
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return True
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