Hi, I am trying to modify an image resize Python project. The project (contributed by a good guy) and it works perfect, the only problem is that I only want to resize a bigger image to smaller image, instead of resizing smaller to bigger.
I need a parameter in the URL to control it e.g. r=1 then only minimize the picture. I tried 3 days already to modify the code but I have no luck since I found that appspot always return error! The problem is I don't know how to program Python. URL: http://image-resize.appspot.com/?url=http://image.gsfc.nasa.gov/image/image_launch_a5.jpg&width=200&height=200 I am wondering anyone could do me a favour to help modify the code. Sorry for my bad English! Ashley # This program is free software: you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by # the Free Software Foundation, either version 3 of the License, or # (at your option) any later version. # # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU General Public License for more details. # # You should have received a copy of the GNU General Public License # along with this program. If not, see <http://www.gnu.org/licenses/ >. from google.appengine.api import images, memcache, urlfetch from google.appengine.ext.webapp import RequestHandler, template, util, WSGIApplication from os import path class ScaleHandler(RequestHandler): def get(self): # Retrieve the request parameters. url = self.request.get("url") width = self.request.get("width", "0") height = self.request.get("height", "0") r = self.request.get("r", "0") # If the url parameter has not been set, display the help document. if not url: topbar = "http://www.yahoo.com"; template_path = path.join(path.dirname(__file__), "imagescaler.html") template_vars = {"topbar": urlfetch.fetch(topbar).content} self.response.out.write(template.render(template_path, template_vars)) return # Determine the cache key for the scaled image according to the request parameters. key = "".join([width, "|", height, "|", url]) # Search for the scaled image as a PNG first, then as a JPEG. thumbnail = memcache.get(key, "png") if thumbnail is None: thumbnail = memcache.get(key, "jpeg") if thumbnail is None: image = memcache.get(url, "png") if image is None: image = memcache.get(url, "jpeg") if image is None: # Retrieve the original image from the remote server. file = urlfetch.Fetch(url) image = file.content # Determine the namespace from the HTTP response headers. if file.headers["content-type"] == "image/ jpeg": namespace = "jpeg" else: namespace = "png" # Attempt to cache the original image if size allows. try: memcache.add(url, image, 0, 0, namespace) except Exception: pass else: namespace = "jpeg" else: namespace = "png" # Wrap the image in the Image API object. image = images.Image(image) # Resize the image according to the requested dimensions. image.resize(int(width), int(height)) # Generate the new version of the image. if namespace == "jpeg": thumbnail = image.execute_transforms(output_encoding=images.JPEG) else: thumbnail = image.execute_transforms() # Cache the new version of the image. memcache.add(key, thumbnail, 0, 0, namespace) else: namespace = "jpeg" else: namespace = "png" # Generate the output to be sent back to the user agent. self.response.headers["content-type"] = "image/" + namespace self.response.out.write(thumbnail) if __name__ == "__main__": util.run_wsgi_app(WSGIApplication([("/", ScaleHandler)], debug=True)) -- You received this message because you are subscribed to the Google Groups "Google App Engine" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/google-appengine?hl=en.
