def create_derived_image(image,pilDerivedImage,type,eraseOldVersions = True):
if eraseOldVersions:
image.derived_images.filter(type = type).delete()
(directory,basename,extension) = image.splitPath()
derivedImageFilename = basename+"_"+type+"."+extension
derivedImagePath = directory+"/"+derivedImageFilename
cnt = 1
while os.path.exists(derivedImagePath):
derivedImageFilename = basename+"_"+type+("_%d" % cnt)+"."+extension
derivedImagePath = directory+"/"+derivedImageFilename
cnt+=1
derivedImageUrl = settings.FILE_UPLOAD_URL+"/"+derivedImageFilename
pilDerivedImage.save(derivedImagePath)
derivedImage = Image()
derivedImage.path = derivedImagePath
derivedImage.user = image.user
derivedImage.base_image = image
derivedImage.type = type
derivedImage.url = derivedImageUrl
derivedImage.width = pilDerivedImage.size[0]
derivedImage.height = pilDerivedImage.size[1]
derivedImage.save()
return derivedImage
def upload_image(imageData,user = None,save = True,path = None):
try:
extension = re.search(r"\.(\w+)$",imageData.name).group(1)
except:
raise Exception("Cannot determine extension from filename: %s" % imageData.name)
try:
temporaryPath = generate_random_filename(settings.FILE_TEMPORARY_UPLOAD_PATH,extension)
if path:
(directory,filename) = os.path.split(path)
match = re.search(r"^(.*)\.(\w+)$",filename)
imageFilenameKey = match.group(1)
else:
imageFilenameKey = generate_random_filename_key(settings.FILE_UPLOAD_PATH,extension = "jpg")
imagePath = settings.FILE_UPLOAD_PATH+"/"+imageFilenameKey+"."+settings.IMAGE_EXTENSION
imageUrl = settings.FILE_UPLOAD_URL+"/"+imageFilenameKey+"."+settings.IMAGE_EXTENSION
temporaryFile = open(temporaryPath,'wb')
for chunk in imageData.chunks():
temporaryFile.write(chunk)
temporaryFile.close()
try:
pilImage = PIL.Image.open(temporaryPath)
aspectRatio = float(pilImage.size[0])/float(pilImage.size[1])
if aspectRatio > 1.:
aspectRatio = 1./aspectRatio
if aspectRatio < settings.IMAGE_MINIMUM_ASPECT_RATIO:
raise AspectRatioException("Aspect ratio of the image is too small!")
pilRescaledImage = shrink_image(pilImage,settings.IMAGE_MAXIMUM_DIMENSIONS)
pilRescaledImage.save(imagePath,settings.IMAGE_FORMAT)
image = Image()
image.user = user
image.path = imagePath
image.url = imageUrl
image.width = pilRescaledImage.size[0]
image.height = pilRescaledImage.size[1]
if save:
image.save()
return image
except:
raise
finally:
if os.path.exists(temporaryPath):
os.remove(temporaryPath)
