def cache_embed(request):
if not request.POST:
return HttpResponseBadRequest("cache_embed requires POST")
url = request.POST.get('url')
if not url:
return HttpResponseBadRequest("POST a url, and I'll happily cache it")
maxwidth = request.POST.get('maxwidth')
#try memcache first
key = make_cache_key(url, maxwidth)
cached_response = cache.get(key)
if cached_response and type(cached_response) == type(dict()):
cached_response['cache'] = 'memcache'
return HttpResponse(json.dumps(cached_response), mimetype="application/json")
#then the database
try:
saved = SavedEmbed.objects.get(url=url, maxwidth=maxwidth)
response = saved.response
response['html'] = saved.html
response['cache'] = 'database'
cache.set(key, response) #and save it to memcache
return HttpResponse(json.dumps(response), mimetype="application/json")
except SavedEmbed.DoesNotExist:
pass
#if we've never seen it before, call the embedly API
client = Embedly(key=settings.EMBEDLY_KEY, user_agent=USER_AGENT)
if maxwidth:
oembed = client.oembed(url, maxwidth=maxwidth)
else:
oembed = client.oembed(url)
if oembed.error:
return HttpResponseServerError('Error embedding %s.\n %s' % (url,oembed.error))
#save result to database
row, created = SavedEmbed.objects.get_or_create(url=url, maxwidth=maxwidth,
defaults={'type': oembed.type})
row.provider_name = oembed.provider_name
row.response = json.dumps(oembed.data)
if oembed.type == 'photo':
html = '<img src="%s" width="%s" height="%s" />' % (oembed.url,
oembed.width, oembed.height)
else:
html = oembed.html
if html:
row.html = html
row.last_updated = datetime.now()
row.save()
#and to memcache
cache.set(key, row.response, 86400)
response = row.response
response['html'] = row.html #overwrite for custom oembed types
response['cache'] = "none"
return HttpResponse(json.dumps(response), mimetype="application/json")
def cache_embed(request, url, maxwidth):
# try memcache first
key = make_cache_key(url, maxwidth)
cached_response = cache.get(key)
if cached_response and type(cached_response) == type(dict()):
# print "got from cache"
cached_response["cache"] = "memcache"
return HttpResponse(json.dumps(cached_response), mimetype="application/json")
# then the database
try:
saved = SavedEmbed.objects.get(url=url, maxwidth=maxwidth)
response = saved.get_response_dict()
response["html"] = saved.html
response["cache"] = "database"
cache.set(key, response) # and save it to memcache
# print "got from database"
return HttpResponse(json.dumps(response), mimetype="application/json")
except SavedEmbed.DoesNotExist:
pass
except TypeError, e:
response = {"error": "Error embedding %s\n%s." % (url, e)}
return HttpResponseServerError(json.dumps(response), mimetype="application/json")
