def post(self):
user = self.get_current_user()
if not user:
self.redirect('/')
return
name = self.request.get('name')
overwrite = self.request.get('overwrite')
chapter = db.get( self.request.get('chapter') )
args = { 'chapter': chapter.key() }
if len(name) == 0:
args['error'] = 'Image must have a name.'
else:
old_image = Image.get_image_by_name(chapter, name)
if overwrite.lower() == 'true':
if old_image:
old_image.delete()
refresh_chapter(chapter)
#chapter.put()
old_image = None
if old_image:
args['image'] = old_image.key()
args['error'] = 'Image with this name already exists.'
else:
data = self.request.get('img')
if len(data) == 0:
args['error'] = 'No data received.'
else:
image = Image.create(chapter, name, data)
args['image'] = image.key()
refresh_chapter(chapter)
self.redirect('/uploadimagepage?%s' % urllib.urlencode(args))
def update_links(chapter, text):
"""Parse the new text and correct if needed.
Consider input text to have Markdown format.
- Image names in reference links need to have urls.
"""
# find all image tags in form ![Alt text][image_name]
# and interpret image_name as markdown reference id
# so text must contain line [image_name]: /proper_image_url
image_link_pattern = re.compile('!\[.*?\]\[(.+?)\]')
id_pattern_template = '\n\[%s\]:.+'
match_list = re.findall(image_link_pattern, text)
refresh = chapter.refresh
for id in match_list:
pattern = id_pattern_template % id
image = Image.get_image_by_name(chapter, id)
if not re.search(pattern,text): # there is no [id]: /url string
if image:
text += '\n['+id+']: '+'/img?key='+str(image.key())
elif refresh: # refresh anyway
if image:
text = re.sub(pattern,'\n['+id+']: '+'/img?key='+str(image.key()),text)
else:
text = re.sub(pattern,'',text)
return text
def get(self):
user = self.get_current_user()
if not user:
self.error(404)
return
key = self.request.get('key')
if key:
try:
image = db.get( key )
except:
self.error(404)
return
else:
name = self.request.get('name')
if not name:
self.error(404)
return
try:
chapter = db.get( self.request.get('chapter') )
except:
self.error(404)
return
image = Image.get_image_by_name(chapter, name)
if not image:
self.error(404)
return
thumbnail = self.request.get('thumbnail')
serveThumbnail = thumbnail and thumbnail == 'true'
self.response.headers['Content-Type'] = str('image/'+image.type)
if serveThumbnail:
self.response.out.write(image.icon)
else:
self.response.out.write(image.data)
