add new youtubedl dependency

downloader/vendor/github.com/kkdai/youtube/v2/utils.go

@@ -0,0 +1,97 @@
+package youtube
+
+import (
+	"encoding/base64"
+
+	sjson "github.com/bitly/go-simplejson"
+)
+
+type chunk struct {
+	start int64
+	end   int64
+	data  chan []byte
+}
+
+func getChunks(totalSize, chunkSize int64) []chunk {
+	var chunks []chunk
+
+	for start := int64(0); start < totalSize; start += chunkSize {
+		end := chunkSize + start - 1
+		if end > totalSize-1 {
+			end = totalSize - 1
+		}
+
+		chunks = append(chunks, chunk{start, end, make(chan []byte, 1)})
+	}
+
+	return chunks
+}
+
+func getFirstKeyJSON(j *sjson.Json) *sjson.Json {
+	m, err := j.Map()
+	if err != nil {
+		return j
+	}
+
+	for key := range m {
+		return j.Get(key)
+	}
+
+	return j
+}
+
+func isValidJSON(j *sjson.Json) bool {
+	b, err := j.MarshalJSON()
+	if err != nil {
+		return false
+	}
+
+	if len(b) <= 4 {
+		return false
+	}
+
+	return true
+}
+
+func sjsonGetText(j *sjson.Json, paths ...string) string {
+	for _, path := range paths {
+		if isValidJSON(j.Get(path)) {
+			j = j.Get(path)
+		}
+	}
+
+	if text, err := j.String(); err == nil {
+		return text
+	}
+
+	if isValidJSON(j.Get("text")) {
+		return j.Get("text").MustString()
+	}
+
+	if p := j.Get("runs"); isValidJSON(p) {
+		var text string
+
+		for i := 0; i < len(p.MustArray()); i++ {
+			if textNode := p.GetIndex(i).Get("text"); isValidJSON(textNode) {
+				text += textNode.MustString()
+			}
+		}
+
+		return text
+	}
+
+	return ""
+}
+
+func getContinuation(j *sjson.Json) string {
+	return j.GetPath("continuations").
+		GetIndex(0).GetPath("nextContinuationData", "continuation").MustString()
+}
+
+func base64PadEnc(str string) string {
+	return base64.StdEncoding.EncodeToString([]byte(str))
+}
+
+func base64Enc(str string) string {
+	return base64.RawStdEncoding.EncodeToString([]byte(str))
+}