90 lines
1.7 KiB
Go
90 lines
1.7 KiB
Go
package contented
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import (
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"crypto/sha512"
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"encoding/hex"
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"io"
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"mime"
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"mime/multipart"
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"os"
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"path"
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"path/filepath"
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"strings"
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"time"
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)
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func (this *Server) handleUpload(src multipart.File, hdr *multipart.FileHeader, UploadIP string) (string, error) {
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// Get file length
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srcLen, err := src.Seek(0, io.SeekEnd)
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if err != nil {
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return "", err
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}
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_, err = src.Seek(0, io.SeekStart)
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if err != nil {
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return "", err
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}
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// Get file hash
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hasher := sha512.New512_256()
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_, err = io.CopyN(hasher, src, int64(srcLen))
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if err != nil {
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return "", err
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}
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_, err = src.Seek(0, io.SeekStart)
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if err != nil {
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return "", err
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}
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// Save file to disk
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fileID := hex.EncodeToString(hasher.Sum(nil))
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dest, err := os.OpenFile(filepath.Join(this.opts.DataDirectory, fileID), os.O_CREATE|os.O_WRONLY, 0600)
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if err != nil {
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if os.IsExist(err) {
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return fileID, nil // hash matches existing upload
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}
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return "", err
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}
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defer dest.Close()
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_, err = io.CopyN(dest, src, int64(srcLen))
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if err != nil {
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return "", err
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}
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// Determine mime type
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ctype := hdr.Header.Get("Content-Type")
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if ctype == "" {
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ctype = mime.TypeByExtension(path.Ext(hdr.Filename))
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}
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if ctype == "" {
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ctype = `application/octet-stream`
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}
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// Blacklisted mime-types
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ctype = strings.ToLower(ctype)
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if strings.HasPrefix(ctype, `text/html`) ||
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strings.HasPrefix(ctype, `application/javascript`) {
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ctype = `application/octet-stream`
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}
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// Persist metadata to DB
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m := Metadata{
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Filename: hdr.Filename,
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UploadTime: time.Now(),
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UploadIP: UploadIP,
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FileSize: srcLen,
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MimeType: ctype,
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}
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err = this.SetMetadata(fileID, m)
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if err != nil {
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return "", err
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}
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// Done
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return fileID, nil
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}
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