1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
| #!/usr/bin/python3
#-*-coding:utf-8-*
import os
import sys
import copy
import time
import argparse
import datetime
import subprocess as sp
from multiprocessing import Process
username = "name"
password = "passwd"
DOWNLOAD_DIR = os.path.dirname(os.path.abspath(__file__))
BACKUP_DIR = os.path.join(DOWNLOAD_DIR, ".backup")
DOWNLOAD_SUCCESS = 0
DOWNLOAD_FAIL = 1
DOWNLOAD_WAIT = 2
def shell(cmd):
try:
sp.call(cmd, shell=True)
except KeyboardInterrupt:
sys.exit(1)
def shout(cmd):
return sp.check_output(cmd, shell=True)
def error_log(msg):
cmd = 'echo "\033[31m%s\033[0m"' % msg
shell(cmd)
def warning_log(msg):
cmd = 'echo "\033[33m%s\033[0m"' % msg
shell(cmd)
def info_log(msg):
cmd = 'echo "\033[32m%s\033[0m"' % msg
shell(cmd)
def info_begin():
msg = ("############ Begin: %s ############"
% sys._getframe().f_back.f_code.co_name)
info_log(msg)
def info_end():
msg = ("############ Finish: %s ############"
% sys._getframe().f_back.f_code.co_name)
info_log(msg)
def sec_ts():
return datetime.datetime.now().timestamp()
def str_center(s, cnt):
jl = int(cnt - len(s))
rl = int(jl/2)
return "%s%s%s" % (" "*(jl-rl), s, " "*rl) if jl > 0 else s
def bytes_conversion(bytes_cnt):
units = ["KB", "MB", "GB", "TB", "PB", "EB", "ZB", "YB", "BB", "NB", "DB"]
prefix = dict()
for i,s in enumerate(units):
prefix[s] = 1<<(i+1) * 10
for s in reversed(units):
if int(bytes_cnt) >= prefix[s]:
value = float(bytes_cnt) / prefix[s]
v_str = str(value)[:3]
v_str = v_str[:-1] if v_str.endswith(".") else v_str
return "%s%s" % (v_str, s)
return "%dB" % bytes_cnt
def get_header_information():
info_begin()
cmd = "curl %s %s -I %s" % (LOGIN_STR, PROXY_STR, URL)
res = shout(cmd).decode("utf-8")
resume_enable = None
for line in res.split("\n"):
if line.startswith("Accept-Ranges"):
resume_enable = True if line.split(":")[-1].strip() == "bytes" else False
elif line.startswith("Content-Length"):
total_bytes = int(line.split(":")[-1].strip())
if resume_enable is None:
error_log("Incorrect password or Invalid url: %s" % URL)
sys.exit(1)
info_end()
return resume_enable, total_bytes
def calculate_each_block_size(total_bytes, bak_pg):
info_begin()
dest_name = os.path.basename(URL)
task_list = []
bytes_end = -1
cnt = 1
while True:
bytes_start = bytes_end + 1
if bytes_start >= total_bytes:
break
bytes_end = int(total_bytes * bak_pg * cnt / 100)
bytes_end = (total_bytes - 1) if bytes_end > (total_bytes - 1) else bytes_end
task_str = "-H 'Range: bytes=%d-%d'" % (bytes_start, bytes_end)
cur_dic = {
"bytes_start" : bytes_start,
"bytes_end" : bytes_end,
"check_size" : (bytes_end - bytes_start + 1),
"task_str" : task_str,
"task_idx" : cnt,
"dest" : dest_name + "_part%d" % cnt
}
task_list.append(cur_dic)
cnt += 1
info_end()
return task_list
def check_exist(task_list):
info_begin()
res = []
for task in copy.deepcopy(task_list):
dest = os.path.join(MULTI_DIR, task["dest"])
if os.path.isfile(dest):
if task["check_size"] == os.path.getsize(dest):
continue
res.append(task)
info_end()
return res
def download_by_multi_jobs(total_bytes, bak_pg, jobs):
info_begin()
WAIT_MAX_TIMES = 5
speed_str_len = 8 # " xxxKB/s"
percent_str_len = 7 # " 100.0%"
dest_name = os.path.basename(URL)
cmd = "mkdir -p %s" % MULTI_DIR
shell(cmd)
digit = max(len(str(total_bytes))+speed_str_len+1, len(" Process %d |" % jobs))
all_task_list = calculate_each_block_size(total_bytes, bak_pg)
dest_list = []
for task in all_task_list:
dest_list.append(os.path.join(MULTI_DIR, task["dest"]))
# Check exist
total_parts = len(all_task_list)
task_list = check_exist(all_task_list)
cur_parts = len(task_list)
download_parts = total_parts - cur_parts
if download_parts > 0:
info_log("Exist %d parts, resuming." % download_parts)
# log begin
line = ""
for i in range(jobs):
idx = i + 1
line += str_center("Process %d" % idx, digit) + "|"
line += str_center("Total", speed_str_len + percent_str_len) + "|"
print(line)
# For log
def log(last_len):
print(last_len * "\b", end='')
line = ""
total_speed = 0
for i, task in enumerate(work_jobs):
idx = i + 1
if task is None:
line += str_center("- -", digit) + "|"
continue
last_size = task["last_size"]
last_sec = task["last_sec"]
sec = sec_ts()
if os.path.isfile(task["dest"]):
size = os.path.getsize(task["dest"])
size_str = "%s" % size
else:
size = 0
size_str = "%s" % "-"
task["last_sec"] = sec
task["last_size"] = size
speed = 0 if sec == last_sec else (size - last_size)/(sec - last_sec)
if speed < 0:
speed = 0
speed_str = task["last_speed_str"]
else:
speed_str = bytes_conversion(speed) + "/s"
task["last_speed_str"] = speed_str
line += str_center("%s %s" % (size_str, speed_str), digit) + "|"
total_speed += speed
total_pg = (download_parts * 100.0 / total_parts)
total_str = "%.1f%s %s/s" % (total_pg, "%", bytes_conversion(total_speed))
line += str_center(total_str, percent_str_len + speed_str_len) + "|"
line += " " * 5
print(line, end="")
sys.stdout.flush()
return len(line)
# Multi process
global work_jobs
work_jobs = [None for i in range(jobs)]
free_jobs = list(range(jobs))
last_len = 0
while True:
# Download completed
if download_parts == total_parts:
print()
break
elif download_parts > total_parts:
error_log("Something error happened. %d" % download_parts)
sys.exit(3)
# Create and start processes
while len(free_jobs) > 0 and task_list:
task = task_list.pop(0)
cmd = ("curl -s %s %s %s -o %s %s" %
(LOGIN_STR, PROXY_STR, task["task_str"], task["dest"], URL))
cur_p = Process(target=shell, kwargs={'cmd':cmd}, daemon=True)
job_idx = free_jobs.pop(0)
task["process"] = cur_p
work_jobs[job_idx] = task
task["last_sec"] = sec_ts()
task["last_size"] = 0
task["last_speed_str"] = "0B/s"
if not cur_p.is_alive():
cur_p.start()
last_len = log(last_len)
time.sleep(0.5)
# If process finish
for idx, task in enumerate(work_jobs):
res = DOWNLOAD_SUCCESS
if task is not None and not task["process"].is_alive():
if idx in free_jobs:
continue
try:
size = os.path.getsize(task["dest"])
if size == task["check_size"]:
res = DOWNLOAD_SUCCESS
elif size == 0:
res = DOWNLOAD_WAIT
else:
res = DOWNLOAD_FAIL
except:
res = DOWNLOAD_WAIT
# If DOWNLOAD_SUCCESS, move to MULTI_DIR
# If DOWNLOAD_FAIL, delete tmp file and insert the task to task_list
# If DOWNLOAD_WAIT, do nothing but make wait_times +1 and
# ensure wait_times <= WAIT_MAX_TIMES
if res == DOWNLOAD_WAIT:
if "wait_times" in task:
if task["wait_times"] > WAIT_MAX_TIMES:
res = DOWNLOAD_FAIL
else:
task["wait_times"] += 1
else:
task["wait_times"] = 1
if res == DOWNLOAD_SUCCESS:
cmd = "mv %s %s" % (task["dest"], MULTI_DIR)
shell(cmd)
download_parts += 1
free_jobs.append(idx)
elif res == DOWNLOAD_FAIL:
# process task
#print("断点续传测试")
#cur_size = os.path.getsize(task["dest"])
#cur_start = task["bytes_start"] + cur_size
#task["task_str"] = ("-C %s -H 'Range: bytes=%d-%d'"
# % (cur_start, cur_start, task["bytes_end"]))
task_list.insert(0, task)
cmd = "rm -f %s" % task["dest"]
shell(cmd)
free_jobs.append(idx)
last_len = log(last_len)
time.sleep(0.5)
# Merge file
cmd = "rm -f %s" % dest_name
shout(cmd)
for item in dest_list:
cmd = "cat %s >> %s" % (item, dest_name)
shout(cmd)
# Deleta backup
for item in dest_list:
cmd = "rm %s" % (item)
#shell(cmd)
info_end()
def download_directly(total_bytes):
info_begin()
cmd = "curl %s %s -O %s" % (LOGIN_STR, PROXY_STR, URL)
shell(cmd)
dest_name = os.path.basename(URL)
check_size = os.path.getsize(dest_name)
if check_size == total_bytes:
info_log("Download successfully.")
else:
error_log("Download failed.")
info_end()
def main(argv):
parser = argparse.ArgumentParser(
description=("A script for DOWNLOADING by RESUMING."))
required_group = parser.add_argument_group(title="Required options")
required_group.add_argument(
'--url', dest="url", required=True, default="",
help='Set url to download.')
common_group = parser.add_argument_group(title="Common options")
common_group.add_argument(
"--back-up", dest="backup_progress", type=int, default=1,
help="Set per progress to backup, which range from 1 to 100. Default: 1")
common_group.add_argument(
"--user", dest="username", type=str, default=username,
help="Set username to download. Default: %s" % username)
common_group.add_argument(
"--pwd", dest="password", type=str, default=password,
help="Set password to download. Default: %s" % password)
common_group.add_argument(
"--login", dest="login", action="store_true", default=False,
help='Whether login to download. Defualt: False')
common_group.add_argument(
"--proxy", dest="proxy", type=str, default="",
help='Set proxy to download. Default: ""')
common_group.add_argument(
"--jobs", dest="jobs", type=int, default=1,
help='Set jobs to download. Default: 1')
arg = parser.parse_args()
global URL, LOGIN_STR, PROXY_STR
URL = arg.url
bak_pg = arg.backup_progress
user = arg.username
pwd = arg.password
is_login_needed = arg.login
proxy = arg.proxy
jobs = arg.jobs
LOGIN_STR = "-u %s:%s" % (user, pwd)
PROXY_STR = "-x '%s'" % proxy
start_ts = sec_ts()
resume_enable, total_bytes = get_header_information()
try:
if resume_enable:
global MULTI_DIR
MULTI_DIR = os.path.join(BACKUP_DIR, "per%s" % bak_pg)
try:
download_by_multi_jobs(total_bytes, bak_pg, jobs)
except KeyboardInterrupt:
for task in work_jobs:
if task is not None:
process = task["process"]
if process.is_alive:
process.terminate()
process.join()
raise KeyboardInterrupt()
except Exception as error:
for task in work_jobs:
if task is not None:
process = task["process"]
if process.is_alive:
process.terminate()
process.join()
raise error
else:
warning_log("不支持断点续传")
download_directly(total_bytes)
except KeyboardInterrupt:
print()
warning_log("KeyboardInterrupt")
sys.exit(1)
end_ts = sec_ts()
info_log("#### Download Successfully! (%d seconds) ####" % (end_ts-start_ts))
if __name__ == "__main__":
main(sys.argv)
|
许你一世凡尘
收录于 shell script