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Maina Wycliffe mainawycliffe

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@mainawycliffe
mainawycliffe / index.html
Created December 8, 2022 10:22
<html>
<head>
<meta charset="utf-8" />
<script src="wasm_exec.js"></script>
<script>
const go = new Go();
WebAssembly.instantiateStreaming(fetch('wasm.wasm'), go.importObject).then((result) => {
go.run(result.instance);
});
</script>
@mainawycliffe
mainawycliffe / ReadConfig.go
Created November 6, 2022 22:37
var yamlExample = []byte(`
{"DB":"SOME_URL","PASSWORD":"pass"}
`)
viper.ReadConfig(bytes.NewBuffer(yamlExample))
viper.SetConfigType("json")
viper.Get("DB")
@mainawycliffe
mainawycliffe / main.go
Created November 6, 2022 22:23
func main() {
// set out config format type - we will use json, but you can use yaml, toml, etc.
viper.SetConfigType("json")
// this function will read the config from firestore
go ReadFirestoreConfigs()
// delay to allow the config to be read
time.Sleep(1 * time.Second)
@mainawycliffe
mainawycliffe / viper_firestore_configs.go
Last active November 6, 2022 22:21
func ReadFirestoreConfigs() {
ctx := context.Background()
// we will use a service account to authenticate and authorize our app
clientOptions := option.WithCredentialsFile("path/to/serviceAccountKey.json")
app, err := firebase.NewApp(ctx, nil, clientOptions)
if err != nil {
log.Fatalln(err)
}
client, err := app.Firestore(ctx)
if err != nil {
@mainawycliffe
mainawycliffe / viper_polling.go
Last active November 6, 2022 22:09
go func(){
for {
time.Sleep(time.Second * 5) // delay after each request for 5 seconds
// read config from source
// update viper
viper.ReadConfig(bytes.NewBuffer(jsonData))
}
}()
@mainawycliffe
mainawycliffe / viper_watch_firestore.go
Created November 6, 2022 22:03
// listen for changes
streamChanges := client.Doc("configs/config").Snapshots(ctx)
defer streamChanges.Stop()
for {
snap, err := streamChanges.Next()
if err != nil {
log.Fatalln(err)
}
jsonData, err := json.Marshal(snap.Data())
if err != nil {
@mainawycliffe
mainawycliffe / viper_ReadConfig.go
Last active November 6, 2022 21:50
data := doc.Data()
jsonData, err := json.Marshal(data)
if err != nil {
log.Fatalln(err)
}
err = viper.ReadConfig(bytes.NewBuffer(jsonData))
if err != nil {
log.Fatalln(err)
}
@mainawycliffe
mainawycliffe / firestore_viper_read.go
Last active November 6, 2022 21:49
doc, err := client.Collection("configs").Doc("config").Get(ctx)
if err != nil {
log.Fatalln(err)
}
data := doc.Data()
@mainawycliffe
mainawycliffe / firestore_viper_client.go
Last active November 6, 2022 21:37
// we will use a service account to authenticate and authorize our app
clientOptions := option.WithCredentialsFile("path/to/serviceAccountKey.json")
app, err := firebase.NewApp(context.TODO(), nil, clientOptions)
if err != nil {
log.Fatalln(err)
}
client, err := app.Firestore(ctx)
if err != nil {
log.Fatalln(err)
@mainawycliffe
mainawycliffe / viper_BindEnv.go
Created October 26, 2022 18:48
viper.SetEnvPrefix("APP_")
// binds "APP_PORT" or "APP_DB_PORT" to config key "port"
err := viper.BindEnv("port", "PORT", "DB_PORT" )
if err != nil {
log.Fatalf("Error binding env: %v", err)
}