element for the specified file Title(rootUrl, fileUri, filePath, fileName, prefix, mime string) (string, error) // Returns an HTML <body> element used to display the specified file Body(rootUrl, fileUri, filePath, fileName, prefix, mime, nonce string) (string, error) // Returns a map of file extensions to MIME type strings. Extensions() map[string]string // Given a file extension, returns the corresponding media type, // if one exists. Otherwise, returns an empty string. MediaType(extension string) string // Optional function used to validate whether a given file matches this format. // If no validation checks are needed, this function should always return true. Validate(filePath string) bool } type Types map[string]Type func (t Types) Add(format Type) { for k := range format.Extensions() { _, exists := t[k] if !exists { t[k] = format } } } func (t Types) FileType(path string) Type { fileType, exists := t[filepath.Ext(path)] if exists { return fileType } return nil } func (t Types) Register(format Type) { t.Add(format) } func (t Types) Validate(path string) bool { format, exists := t[filepath.Ext(path)] if !exists { return false } return format.Validate(path) } func (t Types) GetExtensions() string { var output strings.Builder extensions := make([]string, len(t)) i := 0 for k := range t { extensions[i] = k i++ } slices.Sort(extensions) for _, v := range extensions { output.WriteString(v + "\n") } return output.String() } func (t Types) GetMediaTypes() string { var output strings.Builder var mediaTypes []string for _, j := range t { extensions := j.Extensions() for _, v := range extensions { if v != "" { mediaTypes = append(mediaTypes, v) } } } mediaTypes = removeDuplicateStr(mediaTypes) slices.Sort(mediaTypes) for _, v := range mediaTypes { output.WriteString(v + "\n") } return output.String() } func removeDuplicateStr(strSlice []string) []string { allKeys := make(map[string]bool) list := []string{} for _, item := range strSlice { if _, value := allKeys[item]; !value { allKeys[item] = true list = append(list, item) } } return list } func GetNonce() string { b := make([]byte, NonceLength) if _, err := rand.Read(b); err != nil { return "" } return hex.EncodeToString(b) }

/* Copyright © 2024 Seednode */ package types import ( "crypto/rand" "encoding/hex" "net/http" "path/filepath" "slices" "strings" ) const NonceLength = 6 var SupportedFormats = make(Types) type Type interface { // Returns either "inline" or "embed", depending on whether the file // should be displayed inline (e.g. code) or embedded (e.g. images) Type() string // Adds a CSP header and returns a nonce to be used in generated pages CSP(http.ResponseWriter) string // Returns a CSS string used to format the corresponding page CSS() string // Returns an HTML element for the specified file Title(rootUrl, fileUri, filePath, fileName, prefix, mime string) (string, error) // Returns an HTML <body> element used to display the specified file Body(rootUrl, fileUri, filePath, fileName, prefix, mime, nonce string) (string, error) // Returns a map of file extensions to MIME type strings. Extensions() map[string]string // Given a file extension, returns the corresponding media type, // if one exists. Otherwise, returns an empty string. MediaType(extension string) string // Optional function used to validate whether a given file matches this format. // If no validation checks are needed, this function should always return true. Validate(filePath string) bool } type Types map[string]Type func (t Types) Add(format Type) { for k := range format.Extensions() { _, exists := t[k] if !exists { t[k] = format } } } func (t Types) FileType(path string) Type { fileType, exists := t[filepath.Ext(path)] if exists { return fileType } return nil } func (t Types) Register(format Type) { t.Add(format) } func (t Types) Validate(path string) bool { format, exists := t[filepath.Ext(path)] if !exists { return false } return format.Validate(path) } func (t Types) GetExtensions() string { var output strings.Builder extensions := make([]string, len(t)) i := 0 for k := range t { extensions[i] = k i++ } slices.Sort(extensions) for _, v := range extensions { output.WriteString(v + "\n") } return output.String() } func (t Types) GetMediaTypes() string { var output strings.Builder var mediaTypes []string for _, j := range t { extensions := j.Extensions() for _, v := range extensions { if v != "" { mediaTypes = append(mediaTypes, v) } } } mediaTypes = removeDuplicateStr(mediaTypes) slices.Sort(mediaTypes) for _, v := range mediaTypes { output.WriteString(v + "\n") } return output.String() } func removeDuplicateStr(strSlice []string) []string { allKeys := make(map[string]bool) list := []string{} for _, item := range strSlice { if _, value := allKeys[item]; !value { allKeys[item] = true list = append(list, item) } } return list } func GetNonce() string { b := make([]byte, NonceLength) if _, err := rand.Read(b); err != nil { return "" } return hex.EncodeToString(b) }