aws api gateway mapping template for binary files - amazon-web-services

Question

I am trying to send a binary file and string parameters to AWS API Gateway.
this is the mapping template that is on API Gateway POST:
{
"imageFile" : $input.params('imageFile'),
"purdueUsername" : $input.params('purdueUsername'),
"description" : $input.params('description'),
"price" : $input.params('price'),
"longitude" : $input.params('longitude'),
"latitude" : $input.params('latitude'),
"category" : $input.params('category'),
}
Making a post request results in this:
When I try this
{
"imageFile" : "$input.params('imageFile')",
"purdueUsername" : "$input.params('purdueUsername')",
"description" : "$input.params('description')",
"price" : "$input.params('price')",
"longitude" : "$input.params('longitude')",
"latitude" : "$input.params('latitude')",
"category" : "$input.params('category')",
}
I am getting empty parameters. The api is not receiving the parameters I am sending through POST request.
How should I change the mapping template?
Note: When I only try to have imageFile in the mapping template and only send binary file without extra parameters it works completely fine.
{
"imageFile" : "$input.body"
}
However, I want to be able to send other parameters beside the binary file.

Answer 1

this is how I solved the problem. I am sending the binary file in the body of the POST request and the other parameters as a header.
this is the mapping template I put on the AWS API Gateway
{
"purdueUsername" : "$input.params('purdueUsername')",
"description" : "$input.params('description')",
"price" : "$input.params('price')",
"longitude" : "$input.params('longitude')",
"latitude" : "$input.params('latitude')",
"category" : "$input.params('category')",
"isbnNumber" : "$input.params('isbnNumber')",
"imageFile" : "$input.body"
}