50 lines
1.2 KiB
Go
50 lines
1.2 KiB
Go
package server
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import (
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"fmt"
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"io"
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"strconv"
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"time"
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)
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func writeBencoded(w io.Writer, data interface{}) {
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switch v := data.(type) {
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case string:
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str := fmt.Sprintf("%s:%s", strconv.Itoa(len(v)), v)
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io.WriteString(w, str)
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case int:
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str := fmt.Sprintf("i%se", strconv.Itoa(v))
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io.WriteString(w, str)
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case uint:
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str := fmt.Sprintf("i%se", strconv.FormatUint(uint64(v), 10))
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io.WriteString(w, str)
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case int64:
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str := fmt.Sprintf("i%se", strconv.FormatInt(v, 10))
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io.WriteString(w, str)
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case uint64:
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str := fmt.Sprintf("i%se", strconv.FormatUint(v, 10))
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io.WriteString(w, str)
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case time.Duration: // Assume seconds
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str := fmt.Sprintf("i%se", strconv.FormatInt(int64(v/time.Second), 10))
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io.WriteString(w, str)
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case map[string]interface{}:
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io.WriteString(w, "d")
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for key, val := range v {
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str := fmt.Sprintf("%s:%s", strconv.Itoa(len(key)), key)
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io.WriteString(w, str)
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writeBencoded(w, val)
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}
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io.WriteString(w, "e")
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case []string:
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io.WriteString(w, "l")
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for _, val := range v {
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writeBencoded(w, val)
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}
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io.WriteString(w, "e")
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default:
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// Although not currently necessary,
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// should handle []interface{} manually; Go can't do it implicitly
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panic("Tried to bencode an unsupported type!")
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}
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}
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