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package controller
import (
"encoding/base64"
"fmt"
"html/template"
"io"
"log"
"net/http"
"net/url"
"time"
"drop.janw.name/storage"
qrcode "github.com/skip2/go-qrcode"
)
const MAX_FILESIZE = (1 << 19) * 100
func (app App) FilePost(res http.ResponseWriter, req *http.Request) {
if !app.requireAuth(res, req) {
return
}
if err := req.ParseMultipartForm(MAX_FILESIZE); err != nil {
panic(err)
}
formFile, formFileHeader, err := req.FormFile("file")
if err != nil {
panic(err)
}
protected := req.FormValue("protect") == "on"
fileData, err := io.ReadAll(formFile)
if err != nil {
panic(err)
}
file := storage.File{
Protected: protected,
Filename: formFileHeader.Filename,
Data: fileData,
AvailableUntil: time.Now().Add(time.Hour * 24),
}
key, err := app.storage.Put(file)
if err != nil {
panic(err)
}
log.Println("received new file:", key)
downloadURL := fmt.Sprintf("%s/%s", app.config.Http.BaseAddress, key)
qrcodePng, err := qrcode.Encode(downloadURL, qrcode.Medium, 256)
if err != nil {
panic(err)
}
qrcodeDataUrl := fmt.Sprintf(
"data:image/png;base64,%s",
url.QueryEscape(base64.StdEncoding.WithPadding('=').EncodeToString(qrcodePng)),
)
app.tmpl.ExecuteTemplate(res, "uploaded", struct {
DownloadURL string
QRCode template.URL
}{
DownloadURL: downloadURL,
QRCode: template.URL(qrcodeDataUrl),
})
}
func (app App) FileGet(res http.ResponseWriter, req *http.Request) {
fileId := req.PathValue("file")
file, _ := app.storage.Get(fileId)
if file == nil || !file.IsAvailable() {
if !app.requireAuth(res, req) {
return
}
res.WriteHeader(http.StatusNotFound)
app.tmpl.ExecuteTemplate(res, "404", nil)
return
}
if file.Protected && !app.requireAuth(res, req) {
return
}
res.Header().Add("Content-Type", "application/octet-stream")
res.Header().Add("Content-Disposition", fmt.Sprintf("attachment; filename=\"%s\"", file.Filename))
if _, err := res.Write(file.Data); err != nil {
panic(err)
} else {
log.Println("served file:", fileId, file.Filename)
}
}
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