79 lines
1.8 KiB
Go
79 lines
1.8 KiB
Go
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package ws
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import (
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"crypto/rand"
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"encoding/base64"
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"fmt"
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"io"
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"net/http"
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"os"
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"path/filepath"
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"strings"
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"sectorinf.com/emilis/fupie/ws/route"
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)
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var (
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base64Stripper = strings.NewReplacer("/", "", "+", "", "=", "")
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)
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func Upload(rootDir, redirect string, maxBytes int64) (route.HandlerFunc, error) {
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stat, err := os.Stat(rootDir)
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if err != nil {
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return nil, fmt.Errorf("stat [%s]: %w", rootDir, err)
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}
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if !stat.IsDir() {
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return nil, fmt.Errorf("root path [%s] is not a directory", rootDir)
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}
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rootDir, err = filepath.Abs(rootDir)
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if err != nil {
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return nil, fmt.Errorf("abs filepath [%s]: %w", rootDir, err)
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}
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redirect = strings.TrimRight(redirect, "/")
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return func(ctx route.Context) {
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if err := ctx.Request.ParseMultipartForm(maxBytes); err != nil {
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ctx.Status(http.StatusBadRequest)
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return
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}
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uploads := ctx.Request.MultipartForm.File["upload"]
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if len(uploads) != 1 {
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ctx.Status(http.StatusBadRequest)
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return
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}
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header := uploads[0]
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file, err := header.Open()
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if err != nil {
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ctx.InternalServerErrorf("header.Open: %s", err.Error())
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return
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}
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newFilename := rename(header.Filename)
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path := filepath.Join(rootDir, newFilename)
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fsFile, err := os.Create(path)
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if err != nil {
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ctx.InternalServerErrorf("creating file at [%s]: %s", path, err.Error())
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return
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}
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if _, err := io.CopyBuffer(fsFile, file, nil); err != nil {
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ctx.InternalServerErrorf("writing file at [%s]: %s", path, err.Error())
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return
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}
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fsFile.Close()
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ctx.SeeOther(fmt.Sprintf("%s/%s", redirect, newFilename))
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}, nil
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}
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func rename(name string) string {
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return fmt.Sprintf("%s_%s", randName(4), name)
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}
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func randName(bytes int) string {
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buffer := make([]byte, bytes)
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_, err := rand.Read(buffer)
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if err != nil {
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panic(err)
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}
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return base64Stripper.Replace(base64.StdEncoding.EncodeToString(buffer))
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}
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