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harden: use safe deserialization in stream.go #918

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harden: use safe deserialization in stream.go #918

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10 changes: 4 additions & 6 deletions types/stream/stream.go
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Original file line number Diff line number Diff line change
Expand Up @@ -235,20 +235,18 @@ func (es *EventStream[T]) Next() bool {
}
encoding, _ = et.GetEventEncoding(ev)
} else {
var a interface{}
if err := json.Unmarshal([]byte(data), &a); err != nil {
if !json.Valid([]byte(data)) {
encoding = "string"
}
}

// "auto" means the data field is a mixed union (JSON + plain-text variants).
// Probe the actual data to decide.
if encoding == "auto" {
var a interface{}
if err := json.Unmarshal([]byte(data), &a); err != nil {
encoding = "string"
} else {
if json.Valid([]byte(data)) {
encoding = "application/json"
} else {
encoding = "string"
}
}

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