51 lines
890 B
Go
51 lines
890 B
Go
package filemanager
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import (
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"crypto/md5"
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"crypto/sha1"
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"crypto/sha256"
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"crypto/sha512"
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"encoding/hex"
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e "errors"
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"hash"
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"io"
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"net/http"
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"os"
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)
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// checksum calculates the hash of a file. Supports MD5, SHA1, SHA256 and SHA512.
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func checksum(w http.ResponseWriter, r *http.Request, i *FileInfo) (int, error) {
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query := r.URL.Query().Get("checksum")
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file, err := os.Open(i.Path)
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if err != nil {
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return errorToHTTP(err, true), err
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}
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defer file.Close()
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var h hash.Hash
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switch query {
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case "md5":
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h = md5.New()
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case "sha1":
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h = sha1.New()
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case "sha256":
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h = sha256.New()
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case "sha512":
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h = sha512.New()
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default:
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return http.StatusBadRequest, e.New("Unknown HASH type")
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}
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_, err = io.Copy(h, file)
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if err != nil {
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return http.StatusInternalServerError, err
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}
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val := hex.EncodeToString(h.Sum(nil))
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w.Write([]byte(val))
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return http.StatusOK, nil
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}
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