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Louis
Asked: 2018-10-12 10:53:51 +0800 CST

best practices to execute the almost the same command several times [duplicate]

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I need help figuring out the best practices to execute those commands in bash. It's a command that sends a text, and I need to repeat this command for several phone numbers and for several dates... about 250 times in total. The command returns something like this {"creditsUsed":1.00,"snapshotId":107416458} if it went well. An error code otherwise.

curl -X POST \
-H "X-Primotexto-ApiKey: 784155c6a3c9ceed9d0a4d1ffdb67466" \
-H "Content-Type: application/json" \
-d '{"number":"+317877592979" , "message":"test\nother line" , "sender":"myCompany" , "date": 1539272220000}' \
https://api.primotexto.com/v2/notification/messages/send;

curl -X POST \
-H "X-Primotexto-ApiKey: 784155c6a3c9ceed9d0a4d1ffdb67466" \
-H "Content-Type: application/json" \
-d '{"number":"+317877574678" , "message":"test2\nother line" , "sender":"myCompany" , "date": 1539272220001}' \
https://api.primotexto.com/v2/notification/messages/send;

curl -X POST \
-H "X-Primotexto-ApiKey: 784155c6a3c9ceed9d0a4d1ffdb67466" \
-H "Content-Type: application/json" \
-d '{"number":"+317877574676" , "message":"test3\nother line" , "sender":"myCompany" , "date": 1539272220002}' \
https://api.primotexto.com/v2/notification/messages/send;

...

Should I end it with ; or && ? Should I write a script ? Can I do something better with json ?

EDIT maybe I could build a json file like this :

{
    "number":"+336770002979",
    "message":"La plupart\ntest",
    "sender":"BEinstitute",
    "date": 1539286620000
},
{
    "number":"+336600000780",
    "message":"La plupart\ntest",
    "sender":"BEinstitute",
    "date": 1539286620000
}

and the run through each object with curl. Any idea how to do this ?

$ curl -X POST -H "X-Primotexto-H "Content-Type: application/json" -d @json.json https://api.primotexto.com/v2/notification/messages/send;

only reads the first object.

bash

1 Answers

  1. Best Answer

    It all depends on your requirements. But writing a script is rarely a bad idea, especially for repetitive tasks.

    But between ; and &&, it is a completely different result.

    • ; is a command separator
    • && is a conditional operator (so is ||)

    For example:

    If you try the following command:

    touch /var/no-permission; echo "It works!"

    The first part of the line (before the semicolumn) will fail since you won't have access to create files in /var (as long as you aren't logged in as root of course). But you will see the line "t works! printed in your console because the semicolumn is just a separator and doesn't care if the previous command works or not.

    However, if you try the following command:

    touch /var/no-permission && echo "It works!"

    This won't do anything so you won't see It works! in your console. Since the first command will fail, the && operator will not try to run the next command. (You can also use || instead of && to do its opposite. So the second command only runs when the first fails)

    So if one of the commands fails, all the others should stop, then use &&. If they should continue, use ;.

    Not: If you can write each command on a new line, it's as if you separate them by a semicolumn. For example,

    touch /var/no-permission; echo "It works!"

    Is the same as

    touch /var/no-permission
echo "It works!"
    • 3