Revision of emwin.py

Lucas Teske ревизий этого фрагмента 9 years ago. К ревизии

1 file changed, 102 insertions

emwin.py(файл создан)

		@@ -0,0 +1,102 @@
1	+	#!/usr/bin/env python
2	+
3	+	import time
4	+	from zipfile import ZipFile
5	+
6	+	numfiles = 20
7	+	c = 0
8	+
9	+	def parseEMWINHeader(data):
10	+
11	+	if not data[0] == '/':
12	+	print "Invalid Header: %s" % data[:80]
13	+	return False
14	+
15	+	head = data[:80]
16	+	filename = head[1:15]
17	+	partNumber = head[18:24]
18	+	partTotal = head[27:33]
19	+	cs = head[36:43]
20	+	dateTime = head[46:]
21	+
22	+	return {
23	+	"filename": filename,
24	+	"partNumber": int(partNumber),
25	+	"partTotal": int(partTotal),
26	+	"cs": int(cs),
27	+	"dateTime": dateTime
28	+	}
29	+
30	+	def findSyncMarker(data):
31	+	found = False
32	+	pos = -1
33	+	for i in range(len(data)-13):
34	+	t = True
35	+	for z in range(13):
36	+	if z == 12:
37	+	if not data[i+z] == '/':
38	+	t = False
39	+	break
40	+	else:
41	+	if not ord(data[i+z]) == 0x00:
42	+	t = False
43	+	break
44	+	if t:
45	+	pos = i
46	+	break
47	+	return pos
48	+
49	+	buff = ""
50	+
51	+	files = {}
52	+
53	+	while True:
54	+	if c == numfiles:
55	+	break
56	+	f = open("%s_0.emwin" % c, "rb")
57	+	data = f.read()
58	+	f.close()
59	+	c += 1
60	+	buff += data
61	+	pos = findSyncMarker(buff)
62	+	if pos == -1:
63	+	print "Marker not found"
64	+	continue
65	+
66	+	buff = buff[pos:]
67	+
68	+	if len(buff) < 1116:
69	+	#print "Not yet enough data"
70	+	continue
71	+
72	+	data = buff[pos:pos+1116]
73	+	buff = buff[pos+1116:]
74	+	data = data[12:]
75	+	if len(data) > 0:
76	+	header = parseEMWINHeader(data)
77	+	if header != False:
78	+	data = data[80:]
79	+	filename = header["filename"]
80	+	partNumber = header["partNumber"]
81	+	partTotal = header["partTotal"]
82	+	print "Received %s/%s of %s" %(header["partNumber"], header["partTotal"], header["filename"])
83	+	if partNumber == 1:
84	+	tstamp = int(round(time.time()))
85	+	outFile = "%s-%s" %(tstamp, filename)
86	+	files[filename] = { "parts": partTotal, "received": 0, "output": outFile }
87	+
88	+	if not filename in files:
89	+	print "Received incomplete file %s" %filename
90	+	elif files[filename]["received"] + 1 != partNumber:
91	+	print "Missed %s frames for file %s" %(partNumber + 1 - partNumber, filename)
92	+	else:
93	+	f = open("%s" %files[filename]["output"], "wb" if partNumber == 1 else "ab")
94	+	f.write(data)
95	+	f.close()
96	+	files[filename]["received"] += 1
97	+	if partNumber == partTotal and filename in files:
98	+	print "Finished file %s" %filename
99	+	if ".ZIS" in filename:
100	+	f = ZipFile(files[filename]["output"], "r")
101	+	f.extractall()
102	+	files.pop(filename, None)

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