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Added support for base64 encoded document images

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This commit is contained in:
Roberto Rosario
2011-11-22 07:51:16 -04:00
parent 3a2900ff64
commit b5a1f92a9c
1 changed files with 26 additions and 6 deletions
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32
apps/documents/models.py
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@@ -2,7 +2,9 @@ import os
import tempfile
import hashlib
from ast import literal_eval
import base64
from StringIO import StringIO
from django.db import models
from django.utils.translation import ugettext_lazy as _
from django.utils.translation import ugettext
@@ -26,6 +28,8 @@ from documents.conf.settings import STORAGE_BACKEND
from documents.conf.settings import PREVIEW_SIZE
from documents.conf.settings import DISPLAY_SIZE
from documents.conf.settings import CACHE_PATH
from documents.conf.settings import ZOOM_MAX_LEVEL
from documents.conf.settings import ZOOM_MIN_LEVEL
from documents.managers import RecentDocumentManager, \
DocumentPageTransformationManager
@@ -256,15 +260,31 @@ class Document(models.Model):
image_cache_name = self.get_image_cache_name(page=page)
return convert(image_cache_name, cleanup_files=False, size=size, zoom=zoom, rotation=rotation)
def get_image(self, size=DISPLAY_SIZE, page=DEFAULT_PAGE_NUMBER, zoom=DEFAULT_ZOOM_LEVEL, rotation=DEFAULT_ROTATION):
def get_image(self, size=DISPLAY_SIZE, page=DEFAULT_PAGE_NUMBER, zoom=DEFAULT_ZOOM_LEVEL, rotation=DEFAULT_ROTATION, as_base64=False):
if zoom < ZOOM_MIN_LEVEL:
zoom = ZOOM_MIN_LEVEL
if zoom > ZOOM_MAX_LEVEL:
zoom = ZOOM_MAX_LEVEL
rotation = rotation % 360
try:
return self.get_valid_image(size=size, page=page, zoom=zoom, rotation=rotation)
file_path = self.get_valid_image(size=size, page=page, zoom=zoom, rotation=rotation)
except UnknownFileFormat:
return get_icon_file_path(self.file_mimetype)
file_path = get_icon_file_path(self.file_mimetype)
except UnkownConvertError:
return get_error_icon_file_path()
file_path = get_error_icon_file_path()
except:
return get_error_icon_file_path()
file_path = get_error_icon_file_path()
if as_base64:
image = open(file_path, 'r')
out = StringIO()
base64.encode(image, out)
return u'data:%s;base64,%s' % (get_mimetype(open(file_path, 'r'), file_path, mimetype_only=True)[0], out.getvalue().replace('\n', ''))
else:
return file_path
def invalidate_cached_image(self, page):
try: