Initial commit

cmd/generate/main.go

@@ -0,0 +1,65 @@
+package main
+
+import (
+	"encoding/json"
+	"fmt"
+	"net/http"
+	"os"
+	"os/exec"
+)
+
+type MimeType struct {
+	Source       string   `json:"source"`
+	Extensions   []string `json:"extensions"`
+	Compressible bool     `json:"compressible"`
+	Charset      string   `json:"charset"`
+}
+
+type Data map[string]MimeType
+
+func main() {
+	out, err := os.OpenFile("generated_mime_types.go", os.O_RDWR|os.O_CREATE, 0644)
+	if err != nil {
+		panic(err)
+	}
+
+	defer out.Close()
+
+	rsp, err := http.Get("https://cdn.rawgit.com/jshttp/mime-db/v1.33.0/db.json")
+	if err != nil {
+		panic(err)
+	}
+
+	if rsp.StatusCode != http.StatusOK {
+		panic(rsp)
+	}
+
+	var result Data
+
+	if err := json.NewDecoder(rsp.Body).Decode(&result); err != nil {
+		panic(err)
+	}
+
+	fmt.Fprintln(out, "package mimedb")
+	fmt.Fprintln(out, "")
+	fmt.Fprintln(out, "var (")
+	fmt.Fprintln(out, "	mimeTypeToExts = map[string][]string{")
+
+	for mimeType, entry := range result {
+		if len(entry.Extensions) > 0 {
+			fmt.Fprintf(out, "		%q: %#v,\n", mimeType, entry.Extensions)
+		}
+	}
+
+	fmt.Fprintln(out, "	}")
+	fmt.Fprintln(out, ")")
+
+	if err := out.Close(); err != nil {
+		panic(err)
+	}
+
+	// run `go fmt` on the output
+	if err := exec.Command("go", "fmt").Run(); err != nil {
+		panic(err)
+	}
+}