RESTFUL APIS IN GO - Entwicklertag...SMALL: ONLY 25 KEYWORDS break default var interface select case defer go map struct chan else goto package switch const fallthrough if

RESTFUL APIS IN GOFrankfurter Entwicklertag 2018

Ralf Wirdemann

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[ GitPitch @ bitbucket/rwirdemann/rest-apis-go-md/frankfurter-entwicklertag-2018 ]

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GO 101


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STATICALLY TYPEDvar i int

s := "Hallo" // string

f := 3.142 // float

type struct Product {

Id int

Name string

}

p := Product{1, "Schuhe"}

foo(p)


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SMALL: ONLY 25 KEYWORDS

break default var interface select

case defer go map struct

chan else goto package switch

const fallthrough if range type

continue for import return func


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LOOK, I'M FUNCTIONALfunc bar(x int) bool {

return x == 42

}

func foo(f func (x int) bool) bool {

return f(42)

}

func main() {

foo(bar)

}


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WELL, I'M OO TOOtype Rectangle struct {

size int

border int

}

func (this Rectangle) draw() {

}

r := Rectangle{}

r.draw()


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CROSS PLATFORM-BINARIES


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STANDARD LIBRARY


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NET/HTTPPackage http provides HTTP client and server

implementations.


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http.Handle("/foo", fooHandler)

func fooHandler(w http.ResponseWriter, r *http.Request) {

fmt.Fprintf(w, "Hey, %q", html.EscapeString(r.URL.Path))

}

log.Fatal(http.ListenAndServe(":8080", nil))


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ENCODING/JSONPackage json implements encoding and decoding of

JSON as defined in RFC 4627.


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type Message struct {

Name string

Body string

}

m := Message{"Alice", "Hello"}

b, err := json.Marshal(m)

b == []byte(`{"Name":"Alice","Body":"Hello"}`)

var n Message

err := json.Unmarshal(b, &n)

n == Message{Name: "Alice", Body: "Hello"}


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REST 101Architecture Style

Resourcen

URIs

HTTP-Verbs

Representations

Hypermedia


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RESOURCE EXAMPLE


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GO PAIR PROGRAMMING

[email protected]


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RESTFUL APIS IN GO - Entwicklertag...SMALL: ONLY 25 KEYWORDS break default var interface select case defer go map struct chan else goto package switch const fallthrough if

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