ZTP Error (1) encountered while processing the command curl

[Ezrickd]

Sonic Image Based on 201911

ZTP process fail to execute ztp.json file.

return with Err "sonic ERR sonic-ztp[3572]: !Error (1) encountered while processing the command : /usr/bin/curl -f -v -s -o /var/run/ztp/ztp_data_opt67.json -A "SONiC-0"

issue related to extra characters parsing of EEPROM info at.
ZTP process collect the following decode-syseeprom -p / decode-syseeprom -s / decode-syseeprom -m for HTTP session unique info.
found that the add unique Info to the curl command break the file fetch.

attached syslog.

Jun 2 16:13:56.035865 sonic INFO sonic-ztp[3572]: ZTP service started.
Jun 2 16:13:56.036381 sonic INFO sonic-ztp[3572]: Checking running configuration to load ZTP configuration profile.
Jun 2 16:13:56.946697 sonic INFO sonic-ztp[3570]: Waiting for system online status before continuing ZTP. (This may take 30--120 seconds).
Jun 2 16:15:12.164409 sonic INFO sonic-ztp[3570]: System is ready to respond.
Jun 2 16:15:12.375346 sonic INFO sonic-ztp[3572]: Link up detected for interface eth0
Jun 2 16:15:12.376191 sonic INFO sonic-ztp[3572]: Restarting network discovery after link scan.
Jun 2 16:15:21.692716 sonic INFO sonic-ztp[3572]: Restarted network discovery after link scan.
Jun 2 16:15:31.769706 sonic INFO sonic-ztp[3572]: Downloading provisioning data from http://11.11.11.1/ZTP/4700-1-ztp.json to /var/run/ztp/ztp_data_opt67.json
Jun 2 16:15:32.011267 sonic ERR sonic-ztp[3572]: !Error (1) encountered while processing the command : /usr/bin/curl -f -v -s -o /var/run/ztp/ztp_data_opt67.json -A "SONiC-0
Jun 2 16:15:32.012177 sonic ERR sonic-ztp[3572]: Exception ['NoneType' object is not iterable] encountered while running the discovery logic.
Jun 2 16:15:32.017719 sonic WARNING sonic-ztp[3572]: Invalid provisioning data received. Waiting for 300 seconds before restarting ZTP.

we can see in decode-syseeprom that there are trailing Null in eeprom. when remove the Null ZTP works.

admin@l-csi-4700-02:~$ sudo decode-syseeprom -p | hexdump -c
0000000 M S N 4 7 0 0 \0 \0 \0 \0 \0 \0 \0 \0 \0
0000010 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0
*
0000040 \n
0000041

when EEPROM has the following content it works.
root@AE-2700-5-Sonic:# decode-syseeprom -p | hexdump -c
0000000 M S N 2 7 0 0 \n
0000008
root@AE-2700-5-Sonic:#