amazon web services - Shorthand syntax for message-attributes in the send-message command in aws-cli for sqs -

when trying send message using aws cli sqs, cannot shorthand syntax --message-attributes parameter work.

specifying json file works fine, , reference doesn't show example shorthand option.

here reference command specifies shorthand i'm trying use can't work: http://docs.aws.amazon.com/cli/latest/reference/sqs/send-message.html

here's command i've tried:

aws sqs send-message  --queue-url https://sqs.us-east-1.amazonaws.com/0000000000/aa_queue_name  --message-body "message body goes here"  --message-attributes firstattribute={datatype=string,stringvalue="hello world"},secondattribute={datatype=string,stringvalue="goodbye world"} 

i keep getting error messages:

parameter validation failed: invalid type parameter messageattributes.contenttype, value: stringvalue=snapshot, type: , valid types:

anyone ever managed sending attributes message using shorthand?

currently, documentation of short-hand syntax --message-attributes option incorrect , short-hand syntax not work.

instead, can use json file (as mentioned). can use inline json:

aws sqs send-message    --queue-url https://sqs.us-east-1.amazonaws.com/0000000000/aa_queue_name    --message-body "message body goes here"    --message-attributes '{ "firstattribute":{ "datatype":"string","stringvalue":"hello world" }, "secondattribute:{ "datatype":"string","stringvalue":"goodbye world" }'