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handlers.py
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handlers.py
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# -*- coding:utf-8 -*-
'url handlers'
# import time
import uuid
import os
import magic
import json
import io
import logging
import re
from bottle import template, request, response, HTTPResponse, abort
from PIL import Image, ImageFilter
import redis
from img_process import *
UPLOAD_FOLDER = '/Users/liyouzhi/dev/python/zimg-python/image_storage'
ALLOWED_EXTENSIONS = set(['png', 'jpg', 'jpeg', 'gif', 'webp'])
EXPIRE_TIME = 60 * 15
SETTING_OPTIONS = set(['fill', 'fit', 'stretch'])
POSITIONS = set(['center', 'left_top', 'left_bottom', 'right_top', 'right_bottom'])
WATER_MARK_DEFAULT = '/Users/liyouzhi/dev/python/zimg-python/static/watermark.png'
cache = redis.StrictRedis(host='127.0.0.1', port=6379, db=1)
def next_id():
# return '%016d%s%s' % (int(time.time() * 10000), uuid.uuid4().hex, '0'*16)
return uuid.uuid4().hex
def allowed_file(filename):
return '.' in filename and \
filename.rsplit('.', 1)[1].lower() in ALLOWED_EXTENSIONS
def id2address(id):
addrs = [str(int(id[i:i + 7], 16) % 1024) for i in range(0, 17, 8)]
path = UPLOAD_FOLDER
# path = app.config['UPLOAD_FOLDER']
# for addr in addrs:
# path = os.path.join(path, addr)
path = os.path.join(path, '/'.join(addrs))
return path
def gen_cache_key(id, w=0, h=0, format='', s='', a=0, filter='', ratio='', quality='', watermark=0, position='', watermark_text=''):
return 'ick:v0:' + id + ':' + str(w) + ':' + str(
h) + ':' + format + ':' + s + ':' + str(a) + ':' + filter + ':' + str(ratio) + ':' + quality + ':' + str(watermark) + ':' + position + ':' + watermark_text
# def get_cache(cache_id):
# parts = cache_id.split(':')
# data = cache.get(cache_id)
# if data
def get_image_size(path):
img = Image.open(path)
return img.size
def home():
return template('index.html')
def post_image():
data = request.body.read()
if not data:
abort(400, 'upload file not found!')
mtype = magic.from_buffer(data, mime=True)
im_type = mtype.split('/')
if len(im_type) < 2:
abort(400, 'illegal mimetype!')
if im_type[1] not in ALLOWED_EXTENSIONS:
abort(400, 'invalid image formait!')
id = next_id()
addr = id2address(id)
# create_dir(addr)
os.makedirs(addr)
path = os.path.join(addr, id)
with open(path, 'wb') as f:
f.write(data)
logging.info('upload image "%s" to "%s"', id, addr)
size = get_image_size(path)
ret = {'key': id, 'size': size}
return json.dumps(ret)
def multipart_post_image():
file = request.files.get('file')
if not file:
abort(400, 'upload file not found!')
if not allowed_file(file.filename):
abort(400, 'upload file illegal!')
id = next_id()
addr = id2address(id)
os.makedirs(addr)
# create_dir(addr)
path = os.path.join(addr, id)
file.save(path)
logging.info('upload image "%s" to "%s"', id, addr)
size = get_image_size(path)
ret = {'key': id, 'size': size}
return json.dumps(ret)
RE_ID = r'^[0-9a-f]{32}$'
RE_ID_EXT = r'^([0-9a-f]{32})\.([a-z]+)$'
def get_image(image_id):
# parts = image_id.split('.')
# if len(parts) != 1 and len(parts) != 2:
# abort(400, 'invalid request!')
# if len(parts[0]) != 32:
# abort(400, 'invalid ID!')
#
# image_id = parts[0]
#
# ext = ''
# if len(parts) > 1:
# ext = parts[1].lower()
# if ext not in ALLOWED_EXTENSIONS:
# abort(400, 'invalid format!')
# if ext == 'jpg': ext = 'jpeg'
image_id = image_id.lower()
re_id = re.match(RE_ID, image_id)
re_id_ext = re.match(RE_ID_EXT, image_id)
if re_id:
ext = ''
elif re_id_ext:
image_id = re_id_ext.group(1)
ext = re_id_ext.group(2)
if ext not in ALLOWED_EXTENSIONS:
abort(400, 'invalid format!')
else:
abort(400, 'invalid request!')
if ext == 'jpg': ext = 'jpeg'
addr = id2address(image_id)
path = os.path.join(addr, image_id)
h = int(request.query.h or 0) #参数大小的限制？
w = int(request.query.w or 0)
s = request.query.s
a = int(request.query.a or 0)
filter = request.query.f
ratio = request.query.r
quality = request.query.q
watermark = int(request.query.watermark or 0)
position = request.query.p
watermark_text = request.query.text
if s and s not in SETTING_OPTIONS:
abort(400, 'invalid options!')
if a >= 360:
abort(400, 'invalid angle!')
if ratio and (int(ratio) > 100 or int(ratio) < 0):
abort(400, 'invalid ratio!')
if quality and (int(quality) > 100 or int(quality) < 0):
abort(400, 'invalid quality!')
if watermark:
if not position:
position = 'right_bottom'
elif position not in POSITIONS:
abort(400, 'invalid position! valid positions:[centre, left_top, left_bottom, right_top, right_bottom]')
cache_id = gen_cache_key(image_id, w, h, ext, s, a, filter, ratio, quality, watermark, position, watermark_text)
data = cache.get(cache_id)
# data = None
if data is None:
data = cache.get(gen_cache_key(image_id))
if data is None:
with open(path, 'rb') as f:
data = f.read()
logging.info('open image in file: %s', image_id)
else:
logging.info('get origin cache: %s',gen_cache_key(image_id))
need_resize, need_save, need_rotate, need_filter, need_reduce, need_watermark = False, False, False, False, False, False
if h or w or ratio or a or filter or ext or quality or watermark:
imgfile = io.BytesIO(data)
imgfile.seek(0)
im = Image.open(imgfile)
fmt = im.format
if a: need_rotate = True
if filter: need_filter = True
if h or w: need_resize = True
if ratio:
ratio = int(ratio)
need_reduce = True
if watermark: need_watermark=True
if need_resize or need_rotate or need_filter or ext != fmt or quality or need_watermark: need_save = True
if need_resize and need_reduce:
abort(400, "invalid request! can't reduce and resize a image in the same time!")
if need_resize:
if s == 'fill':
if not h or not w:
abort(400, 'fill option needs 2 arguments!')
im = fill(im, w, h)
logging.info('[fill] (%s) width: %s height: %s', image_id,
w, h)
elif s == 'fit':
if not h or not w:
abort(400, 'fit option needs 2 arguments!')
im = fit(im, w, h)
logging.info('[fit] (%s) width: %s height: %s', image_id,
w, h)
else:
im = resize_image(im, w, h)
logging.info('resize (%s) width: %s height: %s', image_id,
w, h)
if need_reduce:
im = reduce_image(im, ratio)
logging.info('reduce (%s) in %d%% ', image_id, ratio)
if need_rotate:
im = im.rotate(a)
logging.info('rotate (%s) angle: %s', image_id, a)
if need_filter:
if filter == 'b':
im = im.convert('1')
logging.info('covert (%s) to black', image_id)
elif filter == 'bl':
im = im.filter(ImageFilter.BLUR)
logging.info('filter (%s) with BLUR ', image_id)
else:
abort(400, 'invalid filter!')
if need_watermark:
if watermark_text:
print('watermark_text:',watermark_text)
# watermark_im = text2watermark(watermark_text)
watermark_im = text2watermark2(watermark_text)
logging.info('defined watermark (%s)', image_id)
else:
watermark_im = Image.open(WATER_MARK_DEFAULT)
logging.info('default watermark (%s)', image_id)
im = watermark_image(im, watermark_im, position)
if need_save:
if ext == '': ext = fmt
buf = io.BytesIO()
if quality:
im.save(buf,ext,quality=int(quality))
logging.info('save (%s) as %s, quality:%s', image_id, ext, quality)
else:
im.save(buf, ext)
logging.info('save (%s) as %s', image_id, ext)
data = buf.getvalue()
mtype = 'image/' + ext
else:
mtype = magic.from_buffer(data, mime=True)
logging.info('get origin image (%s)', image_id)
cache.set(cache_id, data)
cache.expire(cache_id, EXPIRE_TIME)
d = cache.get(cache_id)
if d != None:
logging.info('set cache: %s', cache_id)
else:
logging.info('get cache: %s', cache_id)
mtype = magic.from_buffer(data, mime=True)
res = HTTPResponse(body=data)
res.set_header('Content-Type', mtype)
return res