-
-
Notifications
You must be signed in to change notification settings - Fork 356
/
start.go
89 lines (76 loc) · 2.39 KB
/
start.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
package main
import (
"io/ioutil"
"log"
"net/http"
"github.com/maxence-charriere/go-app/v9/pkg/app"
)
// hello is a component that displays a simple "Hello World!". A component is a
// customizable, independent, and reusable UI element. It is created by
// embedding app.Compo into a struct.
type hello struct {
app.Compo
}
// The Render method is where the component appearance is defined. Here, a
// "Hello World!" is displayed as a heading.
func (h *hello) Render() app.UI {
return app.H1().Text("Hello World!")
}
// The main function is the entry point where the app is configured and started.
// It is executed on 2 different environments: A client (the web browser) and a
// server.
func main() {
// The first thing to do is to associate the hello component with a path.
//
// This is done by calling the Route() function, which tells go-app what
// component to display for a given path, on both client and server-side.
app.Route("/", &hello{})
// Once the routes set up, the next thing to do is to either launch the app
// or the server that serves the app.
//
// When executed on the client-side, the RunWhenOnBrowser() function
// launches the app, starting a loop that listens for app events and
// executes client instructions. Since it is a blocking call, the code below
// it will never be executed.
//
// On the server-side, RunWhenOnBrowser() does nothing, which allows the
// writing of server logic without needing precompiling instructions.
app.RunWhenOnBrowser()
// Finally, launching the server that serves the app is done by using the Go
// standard HTTP package.
//
// The Handler is an HTTP handler that serves the client and all its
// required resources to make it work into a web browser. Here it is
// configured to handle requests with a path that starts with "/".
http.Handle("/", &app.Handler{
Name: "Hello",
Description: "An Hello World! example",
})
if err := http.ListenAndServe(":8000", nil); err != nil {
log.Fatal(err)
}
}
type foo struct {
app.Compo
response []byte
}
func (f *foo) OnNav(ctx app.Context) {
// Launching a new goroutine:
ctx.Async(func() {
r, err := http.Get("/bar")
if err != nil {
app.Log(err)
return
}
defer r.Body.Close()
b, err := ioutil.ReadAll(r.Body)
if err != nil {
app.Log(err)
return
}
// Storing HTTP response in component field:
ctx.Dispatch(func(app.Context) {
f.response = b
})
})
}