Hands-On Microservices with Rust

Request and response

The request type called QrRequest contains data about the QR image:

#[derive(Clone, Debug, Deserialize, Serialize)]pub struct QrRequest {    pub image: Vec<u8>,}

It implements the Message trait from actix, which is to be set as an associated type of QueueHandler:

impl Message for QrRequest {    type Result = ();}

The response type is represented by the QrResponse enumeration:

#[derive(Clone, Debug, Deserialize, Serialize)]pub enum QrResponse {    Succeed(String),    Failed(String),}

It contains two variants: Succeed for successful results and Failed for errors. It is similar to the Result type of the standard library, but we decided to add our own type to have a chance to override the serialization behavior when we need it. But we ...