Best practices and cosmetics
This commit is contained in:
parent
ca3d486bdf
commit
e917e2c9d2
1 changed files with 54 additions and 42 deletions
94
main.go
94
main.go
|
|
@ -11,12 +11,15 @@ import (
|
|||
"net/http"
|
||||
"os"
|
||||
"os/exec"
|
||||
"path"
|
||||
"time"
|
||||
)
|
||||
|
||||
var level = 4
|
||||
var width = 550
|
||||
var delay = 8 // delay in hours, so that I can see daylight on my wallpaper during the day!
|
||||
const (
|
||||
level = 4
|
||||
width = 550
|
||||
delay = 8 // delay in hours, so that I can see daylight on my wallpaper during the day!
|
||||
)
|
||||
|
||||
type latestData struct {
|
||||
Date string `json:"date"`
|
||||
|
|
@ -25,14 +28,23 @@ type latestData struct {
|
|||
|
||||
func main() {
|
||||
// Define work directory and files
|
||||
var home = os.Getenv("HOME")
|
||||
var work_dir = home + "/.himawari"
|
||||
var image_file = work_dir + "/latest.png"
|
||||
var dat_file = work_dir + "/data"
|
||||
var (
|
||||
home = os.Getenv("HOME")
|
||||
workDir = path.Join(home, ".himawari")
|
||||
imageFile = path.Join(workDir, "/latest.png")
|
||||
dataFile = path.Join(workDir, "/data")
|
||||
data []byte
|
||||
err error
|
||||
oldData = new(latestData)
|
||||
initData = new(latestData)
|
||||
t time.Time
|
||||
location *time.Location
|
||||
output *image.RGBA
|
||||
out *os.File
|
||||
)
|
||||
|
||||
// Read the last date from dat_file if it exists
|
||||
data, err := ioutil.ReadFile(dat_file)
|
||||
oldData := new(latestData)
|
||||
// Read the last date from dataFile if it exists
|
||||
data, err = ioutil.ReadFile(dataFile)
|
||||
if err != nil {
|
||||
data = nil
|
||||
} else {
|
||||
|
|
@ -43,14 +55,16 @@ func main() {
|
|||
}
|
||||
|
||||
// Get the data about the last image
|
||||
initData := new(latestData)
|
||||
err = getJson("http://himawari8-dl.nict.go.jp/himawari8/img/D531106/latest.json", initData)
|
||||
err = getJSON("http://himawari8-dl.nict.go.jp/himawari8/img/D531106/latest.json", initData)
|
||||
if err != nil {
|
||||
log.Fatal("error getting json :", err)
|
||||
log.Fatal("error getting json data from himawari server: ", err)
|
||||
}
|
||||
|
||||
location, _ := time.LoadLocation("Asia/Tokyo")
|
||||
t, _ := time.ParseInLocation("2006-01-02 15:04:05", initData.Date, location)
|
||||
location, err = time.LoadLocation("Asia/Tokyo")
|
||||
if err != nil {
|
||||
log.Fatal("error loading Asia/Tokyo time zone data: ", err)
|
||||
}
|
||||
t, _ = time.ParseInLocation("2006-01-02 15:04:05", initData.Date, location)
|
||||
if oldData != nil && oldData.Date == initData.Date {
|
||||
log.Print("No new image, keeping the old one")
|
||||
os.Exit(0)
|
||||
|
|
@ -58,72 +72,70 @@ func main() {
|
|||
t = t.Add(time.Duration(-delay) * time.Hour)
|
||||
|
||||
// Get all the chunks from the latest image and assemble them
|
||||
output := image.NewRGBA(image.Rect(0, 0, level*width, level*width))
|
||||
output = image.NewRGBA(image.Rect(0, 0, level*width, level*width))
|
||||
for x := 0; x < level; x++ {
|
||||
for y := 0; y < level; y++ {
|
||||
url := fmt.Sprintf("http://himawari8.nict.go.jp/img/D531106/%dd/%d/%s_%d_%d.png",
|
||||
level, width, t.Format("2006/01/02/150405"), x, y)
|
||||
|
||||
var buff image.Image
|
||||
err = getPng(url, &buff)
|
||||
err = getPNG(url, &buff)
|
||||
if err != nil {
|
||||
err = getPng(url, &buff)
|
||||
err = getPNG(url, &buff)
|
||||
if err != nil {
|
||||
log.Fatal("Error getting png :", url)
|
||||
}
|
||||
}
|
||||
|
||||
draw.Draw(output, image.Rect(x*width, y*width, (x+1)*width, (y+1)*width), buff, image.Point{0, 0}, draw.Src)
|
||||
}
|
||||
}
|
||||
|
||||
// Write output to file
|
||||
out, err := os.Create(image_file)
|
||||
out, err = os.Create(imageFile)
|
||||
if err != nil {
|
||||
err := os.Mkdir(work_dir, 0755)
|
||||
err := os.Mkdir(workDir, 0755)
|
||||
if err != nil {
|
||||
log.Fatal("error creating :", err)
|
||||
log.Fatal("error creating output directory:", err)
|
||||
}
|
||||
out, err = os.Create(image_file)
|
||||
out, err = os.Create(imageFile)
|
||||
if err != nil {
|
||||
log.Fatal("error creating :", err)
|
||||
log.Fatal("error creating output file:", err)
|
||||
}
|
||||
}
|
||||
defer out.Close()
|
||||
err = png.Encode(out, output)
|
||||
if err != nil {
|
||||
log.Fatal("Error writing output:", err)
|
||||
log.Fatal("Error writing output file:", err)
|
||||
}
|
||||
|
||||
// Write dat file
|
||||
buff, err := json.Marshal(initData)
|
||||
ioutil.WriteFile(dat_file, buff, 0644)
|
||||
ioutil.WriteFile(dataFile, buff, 0644)
|
||||
|
||||
// Exec feh
|
||||
cmd := exec.Command("feh", "--bg-max", image_file)
|
||||
cmd := exec.Command("feh", "--bg-max", imageFile)
|
||||
err = cmd.Run()
|
||||
if err != nil {
|
||||
log.Fatal("Error launching feh :", err)
|
||||
}
|
||||
}
|
||||
|
||||
func getJson(url string, target interface{}) error {
|
||||
r, err := http.Get(url)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
func getJSON(url string, target interface{}) (err error) {
|
||||
var r *http.Response
|
||||
r, err = http.Get(url)
|
||||
if err == nil {
|
||||
defer r.Body.Close()
|
||||
|
||||
return json.NewDecoder(r.Body).Decode(target)
|
||||
err = json.NewDecoder(r.Body).Decode(target)
|
||||
}
|
||||
return
|
||||
}
|
||||
|
||||
func getPng(url string, image *image.Image) error {
|
||||
r, err := http.Get(url)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
func getPNG(url string, image *image.Image) (err error) {
|
||||
var r *http.Response
|
||||
r, err = http.Get(url)
|
||||
if err == nil {
|
||||
defer r.Body.Close()
|
||||
|
||||
*image, err = png.Decode(r.Body)
|
||||
return err
|
||||
}
|
||||
return
|
||||
}
|
||||
|
|
|
|||
Reference in a new issue