新的vulkan的SDK很难下载

新的vulkan的SDK很难下载，速度很慢，容易掉线，弄了个shell脚本，省得在浏览器上反复点继续下载。

#!/bin/sh

#curl: (28) Connection timed out after 15000 milliseconds

#curl: (28) Operation timed out after 20001 milliseconds with 0 out of 0 bytes received

#curl: (56) OpenSSL SSL_read: SSL_ERROR_SYSCALL, errno 104

attempt_counter=0

max_attempts=20

run_step=0

max_run_steps=2

fileUrl='https://sdk.lunarg.com/sdk/download/1.1.130.0/linux/vulkansdk-linux-x86_64-1.1.130.0.tar.gz?Human=true'

until $(curl --connect-timeout 30 --retry-delay 10 --retry-max-time 25 -C - -o 1.1.130.0.tar.gz $fileUrl); do

if [ ${attempt_counter} -eq ${max_attempts} ];

then

echo "Max attempts reached"

exit 1

elif [ ${run_step} -eq ${max_run_steps} ];

then

echo retrying in 45 seconds...

run_step=0

sleep 45

else

echo Transfer distrupted,retrying in 20 seconds...

sleep 20

printf '.'

attempt_counter=$(($attempt_counter+1))

run_step=$(($run_step+1))

done

printf 'OK\n'

root@root-RESCUER-R215IOBL:~/vulkantest$ sh downloadVulkan.sh
Resuming transfer from byte position 22890589
% Total    % Received % Xferd Average Speed   Time    Time     Time Current
                                 Dload Upload   Total   Spent    Left Speed
2 62.5M    2 1439k    0     0   1362      0 13:22:18 0:18:02 13:04:16 3744
curl: (18) transfer closed with 64090416 bytes remaining to read
Transfer distrupted,retrying in 10 seconds...
Resuming transfer from byte position 24364424
% Total    % Received % Xferd Average Speed   Time    Time     Time Current
                                 Dload Upload   Total   Spent    Left Speed
0 61.1M    0 543k    0     0    825      0 21:34:45 0:11:13 21:23:32     0
curl: (56) OpenSSL SSL_read: SSL_ERROR_SYSCALL, errno 104
Transfer distrupted,retrying in 10 seconds...
Resuming transfer from byte position 24920757
% Total    % Received % Xferd Average Speed   Time    Time     Time Current
                                 Dload Upload   Total   Spent    Left Speed
0 60.5M    0 303k    0     0   1074      0 16:25:56 0:04:49 16:21:07 4002
curl: (18) transfer closed with 63223514 bytes remaining to read
Transfer distrupted,retrying in 10 seconds...
Resuming transfer from byte position 25231326
% Total    % Received % Xferd Average Speed   Time    Time     Time Current
                                 Dload Upload   Total   Spent    Left Speed
2 60.2M    2 1599k    0     0   1665      0 10:32:52 0:16:23 10:16:29     0
curl: (56) OpenSSL SSL_read: SSL_ERROR_SYSCALL, errno 104
Transfer distrupted,retrying in 10 seconds...
Resuming transfer from byte position 26868993
% Total    % Received % Xferd Average Speed   Time    Time     Time Current
                                 Dload Upload   Total   Spent    Left Speed
0 58.7M    0 191k    0     0    706      0 24:13:52 0:04:37 24:09:15 4593
curl: (18) transfer closed with 61389962 bytes remaining to read
Transfer distrupted,retrying in 10 seconds...
Resuming transfer from byte position 27064878
% Total    % Received % Xferd Average Speed   Time    Time     Time Current
                                 Dload Upload   Total   Spent    Left Speed
0 58.5M    0 32043    0     0     61      0 11d 15h 0:08:39 11d 15h     0
curl: (56) OpenSSL SSL_read: SSL_ERROR_SYSCALL, errno 104
Transfer distrupted,retrying in 10 seconds...
Resuming transfer from byte position 27096921
% Total    % Received % Xferd Average Speed   Time    Time     Time Current
                                 Dload Upload   Total   Spent    Left Speed
0 58.5M    0 175k    0     0    636      0 26:47:54 0:04:42 26:43:12     0
curl: (18) transfer closed with 61178420 bytes remaining to read
Transfer distrupted,retrying in 10 seconds...
Resuming transfer from byte position 27276420
% Total    % Received % Xferd Average Speed   Time    Time     Time Current
                                 Dload Upload   Total   Spent    Left Speed
0     0    0     0    0     0      0      0 --:--:-- 0:04:31 --:--:--     0^C
root@root-RESCUER-R215IOBL:~/vulkantest$ sh downloadVulkan.sh
** Resuming transfer from byte position 27276420
% Total    % Received % Xferd Average Speed   Time    Time     Time Current
                                 Dload Upload   Total   Spent    Left Speed
1 58.3M    1 671k    0     0   1162      0 14:37:29 0:09:51 14:27:38     0
curl: (18) transfer closed with 60491019 bytes remaining to read
Transfer distrupted,retrying in 10 seconds...

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新的vulkan的SDK很难下载

新的vulkan的SDK很难下载，速度很慢，容易掉线，弄了个shell脚本，省得在浏览器上反复点继续下载。

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