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package main
/*
In this file we implement config file and command line arguments parsing.
Task lifecycle management are implemented in recording package.
*/
import (
"context"
"fmt"
"github.com/akamensky/argparse"
"github.com/keuin/slbr/api"
"github.com/keuin/slbr/logging"
"github.com/keuin/slbr/recording"
"github.com/keuin/slbr/types"
"github.com/mitchellh/mapstructure"
"github.com/samber/mo"
"github.com/spf13/viper"
"log"
"os"
"os/signal"
"reflect"
"sync"
"syscall"
)
const defaultDiskBufSize = uint64(1024 * 1024) // 1MiB
var globalConfig *GlobalConfig
func getTasks() (tasks []recording.TaskConfig) {
var err error
parser := argparse.NewParser(
"slbr",
"Record bilibili live streams",
)
defer func() {
if err != nil {
fmt.Printf("ERROR: %v.\n", err)
fmt.Print(parser.Usage(""))
os.Exit(0)
}
}()
configFilePtr := parser.String(
"c", "config",
&argparse.Options{
Required: false,
Help: "Specify which configuration file to use. JSON, TOML and YAML are all supported",
},
)
rooms := parser.IntList(
"s", "room",
&argparse.Options{
Required: false,
Help: "Specify which room to record. " +
"The ID is included in bilibili live webpage url. " +
"Set this to run without config file",
},
)
saveToPtr := parser.String(
"o", "save-to",
&argparse.Options{
Required: false,
Help: "Specify the directory where to save records. " +
"If not set, process working directory is used",
},
)
diskBufSizePtr := parser.Int(
"b", "disk-write-buffer",
&argparse.Options{
Required: false,
Help: "Specify disk write buffer size (bytes). " +
"The real minimum buffer size is determined by OS. " +
"Setting this to a large value may make stopping take a long time",
Default: 4194304,
},
)
err = parser.Parse(os.Args)
if err != nil {
return
}
fromCli := len(*rooms) > 0
fromFile := *configFilePtr != ""
if fromCli && fromFile {
err = fmt.Errorf("cannot specify room id argument and config file at the same time")
return
}
if !fromCli && !fromFile {
err = fmt.Errorf("no task specified")
return
}
if fromFile {
configFile := *configFilePtr
fmt.Printf("Config file: %v\n", configFile)
viper.SetConfigFile(configFile)
err = viper.ReadInConfig()
if err != nil {
err = fmt.Errorf("cannot open config file \"%v\": %w", configFile, err)
return
}
if err != nil {
err = fmt.Errorf("cannot read config file \"%v\": %w", configFile, err)
return
}
var gc GlobalConfig
netType := reflect.TypeOf(types.IP64)
err = viper.Unmarshal(&gc, func(conf *mapstructure.DecoderConfig) {
conf.DecodeHook = func(from reflect.Value, to reflect.Value) (interface{}, error) {
if to.Type() == netType &&
types.IpNetType(from.String()).GetDialNetString() == "" {
return nil, fmt.Errorf("invalid IpNetType: %v", from.String())
}
return from.Interface(), nil
}
})
if err != nil {
err = fmt.Errorf("cannot parse config file \"%v\": %w", configFile, err)
return
}
globalConfig = &gc
return globalConfig.Tasks
}
// generate task list from cli
taskCount := len(*rooms)
tasks = make([]recording.TaskConfig, taskCount)
saveTo := mo.EmptyableToOption(*saveToPtr).OrElse(".")
diskBufSize := uint64(*diskBufSizePtr)
if *diskBufSizePtr <= 0 {
diskBufSize = defaultDiskBufSize
}
for i := 0; i < taskCount; i++ {
tasks[i] = recording.TaskConfig{
RoomId: types.RoomId((*rooms)[i]),
Transport: recording.DefaultTransportConfig(),
Download: recording.DownloadConfig{
DiskWriteBufferBytes: int64(diskBufSize),
SaveDirectory: saveTo,
},
}
}
return
}
func main() {
logger := log.Default()
taskConfigs := getTasks()
tasks := make([]*recording.RunningTask, len(taskConfigs))
wg := sync.WaitGroup{}
ctxTasks, cancelTasks := context.WithCancel(context.Background())
fmt.Println("Record tasks:")
for i, task := range taskConfigs {
tasks[i] = recording.NewRunningTask(
taskConfigs[i],
ctxTasks,
func() {},
func() { wg.Done() },
logging.NewWrappedLogger(logger, fmt.Sprintf("room %v", task.RoomId)),
)
fmt.Printf("[%2d] %s\n", i+1, task)
}
fmt.Println("")
apiAddr := os.Getenv("BIND_ADDR")
if apiAddr == "" {
apiAddr = ":8080"
}
apiAgent := &agentImpl{
tasks: &tasks,
}
go func() {
logger.Println("Starting API server...")
err := api.StartServer(apiAddr, apiAgent)
if err != nil {
logger.Fatalf("Failed to start API server: %v", err)
}
}()
logger.Printf("Starting tasks...")
for i := range tasks {
wg.Add(1)
err := tasks[i].StartTask()
if err != nil {
logger.Printf("Cannot start task %v (room %v): %v. Skip.", i, tasks[i].RoomId, err)
wg.Done()
}
}
// listen on stop signals
chSigStop := make(chan os.Signal)
signal.Notify(chSigStop,
syscall.SIGHUP,
syscall.SIGINT,
syscall.SIGTERM)
chSigQuit := make(chan os.Signal)
signal.Notify(chSigQuit, syscall.SIGQUIT)
go func() {
select {
case <-chSigStop:
logger.Println("Stopping all tasks...")
cancelTasks()
case <-chSigQuit:
logger.Println("Aborted.")
os.Exit(0)
}
}()
// block main goroutine on task goroutines
defer func() {
wg.Wait()
logger.Println("YABR is stopped.")
}()
}
|
