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73 lines
1.8 KiB
Go
73 lines
1.8 KiB
Go
package main
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import (
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"fmt"
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"github.com/golang/protobuf/proto"
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"github.com/golang/snappy"
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"github.com/jordanorelli/hyperstone/bit"
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"github.com/jordanorelli/hyperstone/dota"
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)
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// datagram represents the top-level envelope in the dota replay format. All
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// data in the replay file is packed into datagram frames of at most 65kb.
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type dataGram struct {
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cmd dota.EDemoCommands
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tick int64
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compressed bool
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body []byte
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}
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func (g dataGram) String() string {
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if len(g.body) > 30 {
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return fmt.Sprintf("{dataGram cmd: %v tick: %v compressed: %t size: %d body: %q...}", g.cmd, g.tick, g.compressed, len(g.body), g.body[:27])
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}
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return fmt.Sprintf("{dataGram cmd: %v tick: %v compressed: %t size: %d body: %q}", g.cmd, g.tick, g.compressed, len(g.body), g.body)
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}
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func (g *dataGram) check(dump bool) error {
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if g.cmd != dota.EDemoCommands_DEM_Packet {
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return fmt.Errorf("wrong command type in openPacket: %v", g.cmd)
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}
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if g.compressed {
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buf, err := snappy.Decode(nil, g.body)
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if err != nil {
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return wrap(err, "open packet error: could not decode body")
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}
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g.body = buf
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g.compressed = false
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}
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packet := new(dota.CDemoPacket)
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if err := proto.Unmarshal(g.body, packet); err != nil {
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return wrap(err, "onPacket unable to unmarshal message body")
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}
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if dump {
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br := bit.NewBytesReader(packet.GetData())
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for {
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t := br.ReadUBitVar()
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s := br.ReadVarInt()
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b := make([]byte, s)
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br.Read(b)
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if br.Err() != nil {
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break
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}
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fmt.Printf("\t%v\n", entity{t: uint32(t), size: uint32(s), body: b})
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e := entFactory.BuildMessage(int(t))
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if e == nil {
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fmt.Printf("\tno known entity for type id %d\n", int(t))
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continue
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}
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err := proto.Unmarshal(b, e)
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if err != nil {
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fmt.Printf("entity unmarshal error: %v\n", err)
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} else {
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fmt.Printf("\t\t%v\n", e)
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}
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}
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}
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return nil
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}
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