76 lines
1.6 KiB
Go
76 lines
1.6 KiB
Go
/*
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Copyright © 2023 Seednode <seednode@seedno.de>
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*/
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package formats
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import (
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"errors"
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"net/http"
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"os"
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"path/filepath"
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)
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type SupportedFormat struct {
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Name string
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Css string
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Title func(queryParams, fileUri, filePath, fileName, mime string) string
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Body func(queryParams, fileUri, filePath, fileName, mime string) string
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Extensions []string
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MimeTypes []string
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Validate func(filePath string) bool
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}
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// func (s *SupportedFormat) ListExtensions() []string
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type SupportedFormats struct {
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Extensions map[string]*SupportedFormat
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MimeTypes map[string]*SupportedFormat
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}
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func (s *SupportedFormats) Add(t *SupportedFormat) {
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for _, v := range t.Extensions {
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_, exists := s.Extensions[v]
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if !exists {
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s.Extensions[v] = t
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}
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}
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for _, v := range t.MimeTypes {
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_, exists := s.Extensions[v]
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if !exists {
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s.MimeTypes[v] = t
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}
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}
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}
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func FileType(path string, registeredFormats *SupportedFormats) (bool, *SupportedFormat, string, error) {
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file, err := os.Open(path)
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switch {
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case errors.Is(err, os.ErrNotExist):
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return false, nil, "", nil
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case err != nil:
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return false, nil, "", err
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}
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defer file.Close()
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head := make([]byte, 512)
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file.Read(head)
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mimeType := http.DetectContentType(head)
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// try identifying files by mime types first
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fileType, exists := registeredFormats.MimeTypes[mimeType]
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if exists {
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return fileType.Validate(path), fileType, mimeType, nil
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}
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// if mime type detection fails, use the file extension
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fileType, exists = registeredFormats.Extensions[filepath.Ext(path)]
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if exists {
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return fileType.Validate(path), fileType, mimeType, nil
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}
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return false, nil, "", nil
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}
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