Modeling method calls with requests and responses
Since our service will be exposed through various transport protocols, we will need a way to model the requests and responses in and out of our service. We will do this by adding a struct for each type of message our service will accept or return.
In order for somebody to call the Hash method and then receive the hashed password as a response, we'll need to add the following two structures to service.go:
type hashRequest struct {
Password string `json:"password"`
}
type hashResponse struct {
Hash string `json:"hash"`
Err string `json:"err,omitempty"`
}
The hashRequest type contains a single field, the password, and the hashResponse has the resulting hash and an Err string field in case something goes wrong.
Tip
To model remote method calls, you essentially create a struct for the incoming arguments and a struct for the return arguments.
Before continuing, see whether you can model the same request/response pair for the Validate method...
