46 lines
1.1 KiB
Go
46 lines
1.1 KiB
Go
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package util
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import (
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"context"
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"encoding/binary"
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"math/rand"
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"net"
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"strconv"
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"strings"
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"time"
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)
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// GenerateSpanID define func of generate spanID
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func GenerateSpanID(addr string) string {
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strAddr := strings.Split(addr, ":")
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ip := strAddr[0]
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ipLong, _ := IP2Long(ip)
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times := uint64(time.Now().UnixNano())
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rand.NewSource(time.Now().UnixNano())
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spanID := ((times ^ uint64(ipLong)) << 32) | uint64(rand.Int31())
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return strconv.FormatUint(spanID, 16)
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}
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// IP2Long define func of convert ip to unit32 type
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func IP2Long(ip string) (uint32, error) {
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ipAddr, err := net.ResolveIPAddr("ip", ip)
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if err != nil {
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return 0, err
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}
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return binary.BigEndian.Uint32(ipAddr.IP.To4()), nil
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}
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// GetTraceInfoFromCtx define func of get trace info from context
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func GetTraceInfoFromCtx(ctx context.Context) (traceID, spanID, pSpanID string) {
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if ctx.Value("traceid") != nil {
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traceID = ctx.Value("traceid").(string)
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}
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if ctx.Value("spanid") != nil {
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spanID = ctx.Value("spanid").(string)
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}
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if ctx.Value("pspanid") != nil {
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pSpanID = ctx.Value("pspanid").(string)
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}
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return
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}
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