How do I put my struct into a PutRecordInput for AWS Kinesis in Rust?

Question

I am very new to Rust and trying to get a bit of code working that can push a record to a kinesis firehose stream.

struct AuditRecord{
    user_id : String,
    request : Value,
    request_id : String,
    timestamp_raw : i64,
}
...
let client = KinesisClient::new(Region::UsEast1);
let record = PutRecordInput{
    partition_key : requestId.to_string(),
    stream_name : streamName,
    data : auditRecord
};

When I tried this it wants the data in bytes::bytes::Bytes but I am unclear as to how to convert my struct to a bytes::bytes::Bytes representation. Any examples of how to go about this would be appreciated.

For clarification I am using

rusoto = "0.24.2"
rusoto_kinesis = "0.43.0"
rusoto_core = "0.43.0"

Also if anyone know of a good place to see real examples of how to use rusoto to talk with varios AWS entities that would be appreciated.

Answer 1

As other people have stated, It really depends on your choice of serialization. If you chose a string based encoding like xml or json, then you could use something like:

let msg: String = "some message".to_string();

let record = PutRecordInput{
    partition_key : requestId.to_string(),
    stream_name : streamName,
    data : msg.into()
};

// or it could be 
let record = PutRecordInput{
    partition_key : requestId.to_string(),
    stream_name : streamName,
    data : Bytes::from(msg)
};

Where you replace "some message" with your string sterilization of choice.

Though technically, using some binary encoding like protobuf or something are usually a lot more compact, but then whatever is on the other side must be able to interpret the format.