93 lines
1.8 KiB
Go
93 lines
1.8 KiB
Go
package main
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import (
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"errors"
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"fmt"
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"io"
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"math/rand"
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"net/http"
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"os"
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"os/exec"
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)
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var port = os.Getenv("PORT")
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func main() {
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if port == "" {
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port = "8080"
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}
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http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
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svgURL := r.URL.Query().Get("url")
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if svgURL == "" {
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return
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}
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fmt.Println("Fetching " + svgURL)
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filename := "/app/" + randomString(7) + ".svg"
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fmt.Println("Filename: " + filename)
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if err := downloadFile(svgURL, filename); err != nil {
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fmt.Fprintf(w, err.Error())
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return
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}
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fmt.Println("Downloaded SVG")
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dxf, err := convertToDXF(filename)
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if err != nil {
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fmt.Fprintf(w, err.Error())
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return
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}
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fmt.Println("Converted to DXF")
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w.Header().Add("Content-Type", "application/octet-stream")
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w.Header().Add("Content-Length", fmt.Sprint(len(dxf)))
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w.Header().Add("Content-Disposition", "inline; filename=out.dxf")
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fmt.Fprintf(w, string(dxf))
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os.Remove(filename)
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})
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fmt.Println(http.ListenAndServe(":"+port, nil))
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}
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func downloadFile(URL, fileName string) error {
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response, err := http.Get(URL)
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if err != nil {
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return err
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}
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defer response.Body.Close()
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if response.StatusCode != 200 {
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return errors.New("Received non 200 response code")
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}
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file, err := os.Create(fileName)
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if err != nil {
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return err
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}
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defer file.Close()
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_, err = io.Copy(file, response.Body)
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if err != nil {
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return err
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}
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return nil
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}
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func convertToDXF(filename string) ([]byte, error) {
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cmd := exec.Command("python", "/usr/share/inkscape/extensions/dxf_outlines.py", filename)
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return cmd.Output()
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}
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func randomString(n int) string {
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var letters = []rune("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789")
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s := make([]rune, n)
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for i := range s {
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s[i] = letters[rand.Intn(len(letters))]
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}
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return string(s)
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}
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