package main import ( "encoding/json" "fmt" "io/fs" "log" "net/http" "os" "path/filepath" "strings" ) // Information for a LineageOS ROM available for download type LineageOSROM struct { Datetime int `json:"datetime"` Filename string `json:"filename"` ID string `json:"id"` Romtype string `json:"romtype"` Size int `json:"size"` URL string `json:"url"` Version string `json:"version"` } // The HTTP response JSON should be a JSON array of lineageOSROMS available for download type HttpResponseJSON struct { Response []LineageOSROM `json:"response"` } // HTTP Routing func main() { //Public static files http.Handle("/public/", http.StripPrefix("/public/", http.FileServer(http.Dir("public")))) // ROM list http.HandleFunc("/", lineageOSROMListHandler) log.Print("Service listening on :8080") log.Fatal(http.ListenAndServe(":8080", nil)) } // Reads the ROM files on the filesystem and populates a slice of linageOSROMs func getLineageOSROMs(romDirectory string) ([]LineageOSROM, error) { if _, err := os.Stat(romDirectory); os.IsNotExist(err) { return nil, fmt.Errorf("romDirectory '%s' does not exist", romDirectory) } // Get all the zip files and populate romFileNames slice var lineageOSROMs []LineageOSROM err := filepath.WalkDir(romDirectory, func(s string, d fs.DirEntry, err error) error { if err != nil { return fmt.Errorf("walk error occured during file '%s': %v", d.Name(), err) } if filepath.Ext(d.Name()) != ".zip" { return nil } fInfo, err := d.Info() if err != nil { return fmt.Errorf("failed to get file info '%s': %v", d.Name(), err) } // Get information about file and populate rom splitName := strings.Split(d.Name(), "-") if len(splitName) != 5 { log.Printf("ignoring zip file '%d', name is not formatted correctly ") } lineageOSROM := LineageOSROM{ Datetime: int(fInfo.ModTime().Unix()), Filename: d.Name(), ID: "TBD", Romtype: "nightly", Size: int(fInfo.Size()), URL: fmt.Sprintf("https://lineageos-updater.deadbeef.codes/public/%s", d.Name()), Version: "TBD", } lineageOSROMs = append(lineageOSROMs, lineageOSROM) return nil }) if err != nil { return nil, fmt.Errorf("failed to walk romDirectory '%s': %v", romDirectory, err) } return lineageOSROMs, nil } // http - GET / // Writes JSON response for the updater app to know what versions are available to download func lineageOSROMListHandler(w http.ResponseWriter, r *http.Request) { lineageOSROMs, err := getLineageOSROMs("public") if err != nil { w.WriteHeader(http.StatusInternalServerError) log.Printf("failed to get lineageOSROMs: %v", err) return } httpResponseJSON := &HttpResponseJSON{Response: lineageOSROMs} b, err := json.Marshal(httpResponseJSON) if err != nil { w.WriteHeader(http.StatusInternalServerError) log.Printf("failed to marshal lineageOSROMs to json: %v", err) return } w.Write(b) }