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1 | #!/usr/bin/python | |
2 | ||
3 | import logging | |
4 | import os | |
5 | import random | |
6 | import tornado.web | |
7 | ||
8 | from handlers_base import * | |
9 | import backend | |
10 | ||
11 | class IUseImage(BaseHandler): | |
12 | def write_error(self, status_code, **kwargs): | |
13 | """ | |
14 | Select a random image from the errors directory | |
15 | and return the content. | |
16 | """ | |
17 | self.set_header("Content-Type", "image/png") | |
18 | ||
19 | template_path = self.application.settings.get("template_path", "") | |
20 | template_path = os.path.join(template_path, "i-use", "errors") | |
21 | ||
22 | images = os.listdir(template_path) | |
23 | if images: | |
24 | image = random.choice(images) | |
25 | image = os.path.join(template_path, image) | |
26 | ||
27 | imgdata = None | |
28 | with open(image, "rb") as f: | |
29 | imgdata = f.read() | |
30 | ||
31 | self.finish(imgdata) | |
32 | ||
33 | def get(self, profile_id, image_id): | |
34 | image = None | |
35 | ||
36 | when = self.get_argument_date("when", None) | |
37 | ||
38 | # Try to get the image from memcache. If we have a cache miss we | |
39 | # build a new one. | |
40 | mem_id = "iuse-%s-%s-%s" % (profile_id, image_id, self.locale.code) | |
41 | if when: | |
42 | mem_id += "-%s" % when.isoformat() | |
43 | ||
44 | cache = self.get_argument("cache", "true") | |
45 | if cache == "true": | |
46 | image = self.memcached.get(mem_id) | |
47 | ||
48 | if image: | |
49 | logging.debug("Got image from cache for profile: %s" % profile_id) | |
50 | else: | |
51 | logging.info("Rendering new image for profile: %s" % profile_id) | |
52 | ||
53 | image_cls = self.iuse.get_imagetype(image_id) | |
54 | if not image_cls: | |
55 | raise tornado.web.HTTPError(404, "Image class is unknown: %s" % image_id) | |
56 | ||
57 | profile = self.fireinfo.get_profile(profile_id, when=when) | |
58 | if not profile: | |
59 | raise tornado.web.HTTPError(404, "Profile '%s' was not found." % profile_id) | |
60 | ||
61 | # Render the image | |
62 | image = image_cls(self.backend, self, profile).to_string() | |
63 | ||
64 | # Save the image to the memcache for 60 minutes | |
65 | self.memcached.set(mem_id, image, 3600) | |
66 | ||
67 | self.set_header("Content-Type", "image/png") | |
68 | self.write(image) | |
69 |