json - How to curl post data with special characters @ and < -


i using slack app send message slack channel using incoming webhook. , have created bat file , use curl post message. thing if want mention someone, need <@username> in post data.

the post request looks this

content-type: application/json

post https://hooks.slack.com/services/token?{"text":"<@username>this test message"}

with curl, have

curl -h "content-type: application/json" -x post "https://hooks.slack.com/services/token" -d "{\"text\":\"<@username>this test message\"}"

the error message got

0<@username 1>this system cannot find file specified

i realized @username symbol makes curl load data given file "username"

i tried suggestion can find, e.g. encode post data curl -h "content-type: application/json" -x post "https://hooks.slack.com/services/token" -d "{\"text\":\"%3c%40username%3ethis test message\"}"

i got message

c0usernameethis test message

does can me this? otherwise might give curl , try else.

thanks.

https://curl.haxx.se/docs/manpage.html:

--data-raw: (http) posts data -d, --data without special interpretation of @ character.


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