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solver_server.py
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solver_server.py
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import argparse
import cv2
import numpy as np
import base64
import logging
import tempfile
from tornado import web, ioloop
from static_files import StaticFileHandler, IndexHandler, NoCacheMixin
from config import *
import solver
import scanner
SCREENSHOT_SIZES = {
'iphone5': (640, 1136)
}
def print_stack_trace(exception, msg="Exception"):
logging.error("{}: {}".format(msg, str(exception)))
import traceback, sys
logging.error("-"*60)
traceback.print_exc(file=sys.stdout)
logging.error("-"*60)
class ArtusiUploadHandler(web.RequestHandler, NoCacheMixin):
def _add_cors_headers(self):
# CORS header
self.set_header('Access-Control-Allow-Origin', '*')
def create_error_response(self, msg):
self.set_status(412)
self._add_cors_headers()
response = {
'returnValue': 'ERR',
'errorCode': msg,
}
logging.error("HTTP Error 412: {}".format(msg))
return response
#@gen.coroutine
def post(self):
try:
logging.debug("Handling upload of Artusi image")
as_url = self.get_argument('as_url', False) == 'true'
img_data = self.request.files['image_file'][0]['body']
show_step = self.get_argument('show_step', False) == 'true'
matrix_enc = self.get_argument('matrix', None)
tmp_img = self.get_argument('tmp_img', None)
# print("matrix_enc", matrix_enc)
matrix = None
intermediate_file = None
if matrix_enc:
matrix = base64.b64decode(matrix_enc)
# print("matrix",matrix)
matrix = matrix.decode('ascii')
logging.debug("MAtrix received is {}".format(matrix))
if not img_data:
imgfile_b64 = self.get_json_argument('img_data', required=True)
img_data = base64.b64decode(imgfile_b64)
if not img_data or len(img_data) == 0 and not matrix:
self.write(self.create_error_response('no image found nor matrix'))
return
if not matrix:
# now do solving.. if image is of the correct size.
nparr = np.fromstring(img_data, np.uint8)
logging.debug("Image on server, now scanning")
img_np = cv2.imdecode(nparr, cv2.IMREAD_COLOR)
logging.info("Read image {}".format(img_np.shape))
(h, w, _) = img_np.shape
sw, sh = SCREENSHOT_SIZES['iphone5']
ratio = h / w
if w != sw:
_h = int(ratio * sw)
if _h != sh and abs(_h - sh) > 4:
# if h != sh or w != sw:
logging.error("Screen size is {},{} resized to {},{} different from {},{}. Ratio is {}".format(
w, h, sw, _h, sw, sh, ratio
))
self.write(self.create_error_response('screenshot of wrong size '))
return
dim = (sw, sh)
img_np = cv2.resize(img_np, dim, interpolation=cv2.INTER_CUBIC)
logging.info("Image resized to {},{}".format(sw,sh))
# save itnermediate step as temp file, scaled
intermediate_file = tempfile.NamedTemporaryFile(dir=TEMP_DIR, suffix=".jpg", delete=False)
bw = cv2.cvtColor(img_np, cv2.COLOR_BGR2GRAY)
cv2.imwrite(intermediate_file.name, bw)
logging.info("File downloaded written to {}".format(intermediate_file.name))
loop = ioloop.IOLoop.current()
# delete after 10'..
loop.call_later(60 * 10, self.delete_temp_file, intermediate_file)
import time
# time.sleep(2)
# now do solve..
image, matrix = solver.solve_artusi(img_np, True, show_step=show_step, no_console=True)
else:
# solve with matrix
tmp_img_filename = tmp_img
image, matrix = solver.solve_artusi_with_matrix(matrix, no_console=True, tmp_img_filename=tmp_img_filename)
retval, buf = cv2.imencode('.jpg', image)
if not retval:
raise Exception("Error encoding image")
img_data = buf.tostring()
if as_url:
# save to temporary file
filename = tempfile.NamedTemporaryFile(dir=TEMP_DIR, suffix=".jpg", delete=False)
cv2.imwrite(filename.name, image)
logging.info("File written as temp to {}".format(filename.name))
response = {
'url': '/static/tmp/{}'.format(os.path.basename(filename.name)),
}
if matrix:
m = solver.Matrix.matrix_to_string(matrix, bare=True)
m = bytes(m, 'ascii')
enc = base64.b64encode(m)
response['matrix'] = enc.decode('ascii'),
if intermediate_file:
response['tmp_image'] = intermediate_file.name
self.set_header("Content-type", "application/json")
self.write(response)
#delete after X minutes
loop = ioloop.IOLoop.current()
loop.call_later(15, self.delete_temp_file, filename)
else:
self.set_header("Content-type", "image/jpeg")
self.set_header("Content-Disposition", "attachment; filename=artusi_solution.jpg")
self.set_status(200)
self._add_cors_headers()
self.write(img_data)
return
except Exception as e:
print_stack_trace(e,'Generic error solving')
self.write(self.create_error_response("Generic error: {}".format(e)))
def delete_temp_file(self, file):
logging.info("deleting {}".format(file.name))
os.unlink(file.name)
url_patterns = [
(r'/', IndexHandler),
(r'/static/(.*)', StaticFileHandler, {'path': STATIC_DIR}),
#(r'/ws', WSHandler),
(r'/artusi/upload', ArtusiUploadHandler)
#(r'/api/system/start', StartHandler),
]
logger = logging.getLogger(__package__)
if __name__=='__main__':
parser = argparse.ArgumentParser(description='HTTP Server')
parser.add_argument('port', type=int, help='Listening port for HTTP Server')
parser.add_argument('ip', help='HTTP Server IP')
args = parser.parse_args()
# setup logger
log_level = logging.DEBUG
logger.setLevel(log_level)
console_handler = logging.StreamHandler()
console_handler.setLevel(log_level)
formatter = None
try:
# noinspection PyUnresolvedReferences
import colorlog
formatter = colorlog.ColoredFormatter(
"%(log_color)s%(levelname)-6s%(reset)s %(cyan)s%(name)-10s %(white)s%(message)s",
log_colors={
'DEBUG': 'blue',
'INFO': 'green',
'WARNING': 'yellow',
'ERROR': 'red',
'CRITICAL': 'red',
'EXCEPTION': 'red',
}
)
except ImportError:
formatter = logging.Formatter(
"%(asctime)s - %(levelname)s - %(name)s - %(message)s",
)
finally:
console_handler.setFormatter(formatter)
logger.addHandler(console_handler)
settings = {
'template_path': STATIC_DIR,
# 'er_tcp_port': int(options.tcp_port),
'er_http_port': int(args.port),
# 'autoreload': True
'debug': True
}
# http server for api
application = web.Application(url_patterns, **settings)
#application.listen(options.http_port)
from tornado.httpserver import HTTPServer
httpserver = HTTPServer(application)
httpserver.listen(args.port, args.ip)
logging.info("Server started")
loop = ioloop.IOLoop.current()
# loop.spawn_callback(poller)
loop.start()
# server = SimpleHttpServer(args.ip, args.port)
# print('HTTP Server Running...........')
# server.start()
# server.waitForThread()