121 lines
3.5 KiB
Go
121 lines
3.5 KiB
Go
/*
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GoToSocial
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Copyright (C) 2021-2022 GoToSocial Authors admin@gotosocial.org
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU Affero General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Affero General Public License for more details.
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You should have received a copy of the GNU Affero General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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package media
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import (
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"errors"
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"fmt"
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"github.com/h2non/filetype"
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"github.com/sirupsen/logrus"
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)
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// parseContentType parses the MIME content type from a file, returning it as a string in the form (eg., "image/jpeg").
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// Returns an error if the content type is not something we can process.
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//
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// Fileheader should be no longer than 262 bytes; anything more than this is inefficient.
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func parseContentType(fileHeader []byte) (string, error) {
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if fhLength := len(fileHeader); fhLength > maxFileHeaderBytes {
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return "", fmt.Errorf("parseContentType requires %d bytes max, we got %d", maxFileHeaderBytes, fhLength)
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}
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kind, err := filetype.Match(fileHeader)
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if err != nil {
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return "", err
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}
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if kind == filetype.Unknown {
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return "", errors.New("filetype unknown")
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}
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return kind.MIME.Value, nil
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}
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// supportedImage checks mime type of an image against a slice of accepted types,
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// and returns True if the mime type is accepted.
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func supportedImage(mimeType string) bool {
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acceptedImageTypes := []string{
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mimeImageJpeg,
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mimeImageGif,
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mimeImagePng,
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}
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for _, accepted := range acceptedImageTypes {
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if mimeType == accepted {
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return true
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}
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}
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return false
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}
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// supportedEmoji checks that the content type is image/png or image/gif -- the only types supported for emoji.
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func supportedEmoji(mimeType string) bool {
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acceptedEmojiTypes := []string{
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mimeImageGif,
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mimeImagePng,
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}
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for _, accepted := range acceptedEmojiTypes {
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if mimeType == accepted {
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return true
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}
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}
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return false
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}
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// ParseMediaType converts s to a recognized MediaType, or returns an error if unrecognized
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func ParseMediaType(s string) (Type, error) {
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switch s {
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case string(TypeAttachment):
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return TypeAttachment, nil
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case string(TypeHeader):
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return TypeHeader, nil
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case string(TypeAvatar):
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return TypeAvatar, nil
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case string(TypeEmoji):
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return TypeEmoji, nil
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}
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return "", fmt.Errorf("%s not a recognized MediaType", s)
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}
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// ParseMediaSize converts s to a recognized MediaSize, or returns an error if unrecognized
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func ParseMediaSize(s string) (Size, error) {
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switch s {
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case string(SizeSmall):
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return SizeSmall, nil
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case string(SizeOriginal):
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return SizeOriginal, nil
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case string(SizeStatic):
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return SizeStatic, nil
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}
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return "", fmt.Errorf("%s not a recognized MediaSize", s)
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}
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// logrusWrapper is just a util for passing the logrus logger into the cron logging system.
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type logrusWrapper struct {
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}
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// Info logs routine messages about cron's operation.
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func (l *logrusWrapper) Info(msg string, keysAndValues ...interface{}) {
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logrus.Info("media manager cron logger: ", msg, keysAndValues)
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}
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// Error logs an error condition.
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func (l *logrusWrapper) Error(err error, msg string, keysAndValues ...interface{}) {
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logrus.Error("media manager cron logger: ", err, msg, keysAndValues)
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}
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