Go R1 Day 4

2020-08-20 423 words 2 minutes

Day 4 of 100

progress

In the last week some more Pluralsight Go (Nigel’s courses are always stellar)
I’ve done some odd work as had time in between last update, but nothing structured. Might continue with learn-go-with-tests but also came across exercism and might tackle that soon as well.
Setup new project in Visual Studio Codespaces
Used Serverless Framework to generate aws-go template project
Imported aws-go-sdk resources for AWS SSM Secrets Manager
Grabbed SSM Secrets manager output and used to create a POST request for authorization token
Used DumpRequest to pretty print output for debugging purpose
Hung my head in shame at my copy pasta project 😀
Realized half of the battle is just getting my lambda debugging effort running locally. Not exactly the easiest starter project.
Need to master different request types. PowerShell makes this easy with Invoke-RestMethod and object construction. I found that the Post method wasn’t appropriate as I wanted to control custom headers. This required me to use a different approach, which I ended up doing with http.Client{}.
Not sure in a Go Playground sample to test and echo a post request. Thinking if no service that does this might try creating a Go routine to accept the request locally and echo for the purpose of a demo. Any suggestions welcome.
Identified i really need better understanding of the godoc libraries as would help a lot. Vscode intellisense even in codespaces isn’t performing great, so I’m not getting that help that would really expedite discovery as a beginner. I might give my EAP Goland install a try and see if it helps.
Successfully included zap logging library
Successfully submitted request for authorization token and got response back into a struct, something that as a newbie I found a major win 🎉 using json.Unmarshal([]byte(body), ar) with ar referring to a pointer another win for me as new to pointers) being passed in like below:

 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16


// AuthResponse the authorization object returned by taco service when doing fancy things
type AuthResponse struct {
	MagicalToken string `json:"magical_token"`
	ExpiresIn    int    `json:"expires_in"`
}

func main() {
	var ar AuthResponse
	getToken(&ar) // pointer for the win ⚡️
}
func getToken(ar *AuthResponse) {
	json.Unmarshal([]byte(body), ar) // ❓ using bytes for json is new to me. gotta learn more
	sugar.Infow("Logging library with zap used to generate structured logs",
	"authResponse", ar,  // trailing quotes is the norm, also a new pattern for me
)
}

Go R1 Day 4

Day 4 of 100

progress

links

Webmentions