/
main.go
53 lines (43 loc) · 1.12 KB
/
main.go
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package main
import (
"bytes"
"image/jpeg"
"log"
"net/http"
"os"
"strconv"
"github.com/gorilla/mux"
"github.com/nfnt/resize"
)
// our main function
func main() {
port := os.Getenv("PORT")
router := mux.NewRouter()
router.HandleFunc("/{width}/{height}", GetImage).Methods("GET")
log.Fatal(http.ListenAndServe(":"+port, router))
}
//GetImage load lucho image
func GetImage(w http.ResponseWriter, r *http.Request) {
params := mux.Vars(r)
width, err := strconv.ParseUint(params["width"], 10, 32)
height, err := strconv.ParseUint(params["height"], 10, 32)
file, err := os.Open("LuisJara2013.jpg")
if err != nil {
log.Fatal(err)
}
img, err := jpeg.Decode(file)
if err != nil {
log.Fatal(err)
}
file.Close()
m := resize.Resize(uint(width), uint(height), img, resize.Lanczos3)
buffer := new(bytes.Buffer)
if err := jpeg.Encode(buffer, m, nil); err != nil {
log.Println("unable to encode image.")
}
w.Header().Set("Content-Type", "image/jpeg")
w.Header().Set("Content-Length", strconv.Itoa(len(buffer.Bytes())))
if _, err := w.Write(buffer.Bytes()); err != nil {
log.Println("unable to write image.")
}
}