[原创]论坛头像自动换原理 - 全球主机交流论坛

<?php
$min ='1';
$max ='替换为你总共的图片数';
$randnum = mt_rand($min,$max);
header('Content-type: image/gif');
readfile("./{$randnum}.gif");
?>

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<?php $url='face'; $files=array(); if ($handle=opendir("$url")) { while(false !== ($file = readdir($handle))) { if ($file != "." && $file != "..") { if(substr($file,-3)=='png' || substr($file,-3)=='jpg') $files[count($files)] = $file; } } } closedir($handle); $random=rand(0,count($files)-1); readfile("$url/$files[$random]"); ?>

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import wsgiref.handlers
import random
from google.appengine.api import users
from google.appengine.ext import webapp
from google.appengine.ext import db
from google.appengine.api import urlfetch
from google.appengine.api import images
from google.appengine.api import memcache
class Avatar(db.Model):
url_mime = db.StringProperty(required=True) # mime if avatar, or url
avatar = db.BlobProperty()
def flushcache():
return memcache.Client().delete('avatars')
def getcachedlist():
alist = memcache.Client().get('avatars')
if alist:
return alist
else:
alist = []
q = Avatar.all();
for avatar in q:
alist.append(str(avatar.key()))
return alist
def checkauth(handler):
user = users.get_current_user()
if not (user and users.is_current_user_admin()):
handler.redirect(users.create_login_url(handler.request.uri))
def sendmsg(handler, msg, dest=None):
handler.response.clear()
handler.response.headers['Content-Type'] = 'text/html'
if 'Referer' in handler.request.headers:
dest = handler.request.headers['Referer']
if dest:
handler.response.out.write("""
<html>
<head><title>Message</title></head>
<body>
<script language="JavaScript">
alert("%s");
window.location="%s";
</script>
%s
go to <a href="%s">%s</a>
</body>
</html>
""" % (msg, dest, msg, dest, dest))
else:
handler.response.out.write("""
<html>
<head><title>Message</title></head>
<body>
<script language="JavaScript">
alert("%s");
history.back();
</script>
%s
go back now
</body>
</html>
""" % (msg, msg))
def sendavatar(handler, url_mime=None, avatar=None):
handler.response.clear()
handler.response.headers['Expires'] = 'Thu, 01 Dec 1994 16:00:00 GMT'
if url_mime:
if avatar:
handler.response.headers['Content-Type'] = 'image/png'
handler.response.out.write(avatar)
else:
handler.redirect(url_mime)
else:
handler.response.headers['Content-Type'] = 'text/plain'
handler.response.out.write('no avatar')
def resizeandsaveavatar(handler, url_mime, avatar=None):
if avatar:
r = int(handler.request.get('r'))
w = int(handler.request.get('w'))
h = int(handler.request.get('h'))
if w == 0 and h == 0 and r == 0 and url_mime \
and handler.request.get('hflip') != 'yes' \
and handler.request.get('vflip') != 'yes' \
and handler.request.get('lucky') != 'yes': # no op
avataro = Avatar(url_mime=url_mime, avatar=db.Blob(avatar))
else:
imageo = images.Image(avatar)
if w or h:
imageo.resize(w, h)
imageo.rotate(r)
if handler.request.get('hflip') == 'yes':
imageo.horizontal_flip()
if handler.request.get('vflip') == 'yes':
imageo.vertical_flip()
if handler.request.get('lucky') == 'yes':
imageo.im_feeling_lucky()
avataro = Avatar(url_mime='image/png', avatar=db.Blob(imageo.execute_transforms()))
else:
avataro = Avatar(url_mime=url_mime)
avataro.put()
flushcache()
class addavatar(webapp.RequestHandler):
def get(self):
checkauth(self)
self.response.headers['Content-Type'] = 'text/html'
self.response.out.write("""
<html>
<head><title>Add Avatar</title></head>
<body>
<form method="post" enctype="multipart/form-data">
URL/MIME: <input type="text" name="url_mime" value=""/>
(if you don't want us to convert, please tell us MIME)
<label><input type="checkbox" name="fetch" value="yes" checked="checked"> Fetch it</label>
Avatar: <input type="file" name="avatar"/>
Image Operation:
(CMYK images can't be transformed)
Resize to: <input type="text" size="5" name="w" value="0"> x <input type="text" size="5" name="h" value="0">
(width x height, 0 x 0 means not resizing)
Rotate clockwise: <input type="text" size="5" name="r" value="0"> deg.
<label><input type="checkbox" name="hflip" value="yes"> Flip horizontally</label>
<label><input type="checkbox" name="vflip" value="yes"> Flip vertically</label>
<label><input type="checkbox" name="lucky" value="yes"> I'm Feeling Lucky</label>
<input type="submit" value="Add"/>
</form>
<a href="/listavatar">Avatar List</a>
</body>
</html>
""")

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def post(self):
checkauth(self)
url_mime = self.request.get('url_mime')
avatar = self.request.get('avatar')
if url_mime or avatar:
if avatar:
try:
resizeandsaveavatar(self, url_mime, avatar)
sendmsg(self, 'added')
except Exception, ex:
sendmsg(self, "failed to transform and/or save: %s" % ex)
else:
if self.request.get('fetch') == 'yes':
try:
fc = urlfetch.fetch(url_mime)
if fc.status_code == 200:
if 'Content-Type' in fc.headers:
url_mime = fc.headers['Content-Type']
else:
url_mime = None
avatar = fc.content
try:
resizeandsaveavatar(self, url_mime, avatar)
sendmsg(self, 'added')
except Exception, ex:
sendmsg(self, "failed to transform and/or save: %s" % ex)
else:
sendmsg(self, 'cannot fetch avatar: http status ' + str(fc.status_code))
except Exception, ex:
sendmsg(self, 'cannot fetch avatar: %s' % ex)
else:
try:
resizeandsaveavatar(self, url_mime)
sendmsg(self, 'added')
except Exception, ex:
sendmsg(self, "failed to transform and/or save: %s" % ex)
else:
sendmsg(self, 'fill in the form!')
def sendavatarbykey(handler, key):
avatar = db.get(key)
if avatar:
sendavatar(handler, avatar.url_mime, avatar.avatar)
else:
sendavatar(handler)
class showspecavatar(webapp.RequestHandler):
def get(self, key):
sendavatarbykey(self, key)
class showavatar(webapp.RequestHandler):
def get(self, ext):
alist = getcachedlist()
key = random.choice(alist)
sendavatarbykey(self, key)
class flushavatarcache(webapp.RequestHandler):
def get(self):
checkauth(self)
self.response.headers['Content-Type'] = 'text/plain'
self.response.out.write(str(flushcache()))
self.response.out.write("""
The return value is 0 (DELETE_NETWORK_FAILURE) on network failure,
1 (DELETE_ITEM_MISSING) if the server tried to delete the item but didn't have it,
and 2 (DELETE_SUCCESSFUL) if the item was actually deleted.
This can be used as a boolean value, where a network failure is the only bad condition.""")
class delavatar(webapp.RequestHandler):
def get(self, key):
checkauth(self)
avatar = db.get(key)
if avatar:
avatar.delete()
flushcache()
sendmsg(self, 'avatar %s is deleted' % key)
else:
sendmsg(self, 'nothing to delete')
class listavatar(webapp.RequestHandler):
def get(self, sizelimit=None):
if sizelimit:
trstr = """
<tr><td><a href="/delavatar/%%s">Delete</a></td><td><img width="%s" height="%s" src="/avatar/%%s"/></td><td>%%s</td></td><td>%%s</td></tr>
""" % (sizelimit, sizelimit)
else:
trstr = """
<tr><td><a href="/delavatar/%s">Delete</a></td><td><img src="/avatar/%s"/></td><td>%s</td><td>%s</td></tr>
"""
q = Avatar.all()
self.response.headers['Content-Type'] = 'text/html'
self.response.out.write("""
<html>
<head><title>List of Avatars (%d in total)</title></head>
<body>
<a href="/addavatar">Add Avatar</a> | <a href="/flushavatarcache" target="_blank">Flush Cache</a> | Size: <input type="text" size="4" id="limit">
<input type="button" value="go" onclick="window.location='/listavatar/'+document.getElementById('limit').value"/>
<table border="1"><tr><td>Action</td><td>Avatar</td><td>URL/MIME</td><td>Key</td></tr>
""" % q.count())
for avatar in q:
key = str(avatar.key())
self.response.out.write(trstr % (key, key, ('MIME:' if avatar.avatar else 'URL:') + str(avatar.url_mime), key))
self.response.out.write("""
</table>
</body>
</html>
""")
def main():
application = webapp.WSGIApplication([
('/addavatar', addavatar),
('/avatar(\..*)?', showavatar),
('/avatar/(.+)', showspecavatar),
('/delavatar/(.+)', delavatar),
('/listavatar', listavatar),
('/listavatar/(.*)', listavatar),
('/flushavatarcache', flushavatarcache)
])
wsgiref.handlers.CGIHandler().run(application)
if __name__ == "__main__":
main()

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