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Utf16 bom support #4326

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Utf16 bom support #4326

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dc23e71
added UTF-16 BOM support
joeleonjr Jul 21, 2025
3e14971
removed BOM removal; doesn't make a difference
joeleonjr Jul 21, 2025
537b3d4
Merge branch 'main' into utf16-BOM
joeleonjr Aug 8, 2025
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12 changes: 12 additions & 0 deletions pkg/decoders/utf16_test.go
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Original file line number Diff line number Diff line change
Expand Up @@ -27,6 +27,18 @@ func TestUTF16Decoder(t *testing.T) {
expected: []byte("Hello World"),
expectNil: false,
},
{
name: "Valid UTF-16LE input with BOM (FF FE)",
input: []byte{255, 254, 72, 0, 101, 0, 108, 0, 108, 0, 111, 0, 32, 0, 87, 0, 111, 0, 114, 0, 108, 0, 100, 0},
expected: []byte("Hello World"),
expectNil: false,
},
{
name: "Valid UTF-16BE input with BOM (FE FF)",
input: []byte{254, 255, 0, 72, 0, 101, 0, 108, 0, 108, 0, 111, 0, 32, 0, 87, 0, 111, 0, 114, 0, 108, 0, 100},
expected: []byte("Hello World"),
expectNil: false,
},
{
name: "Invalid UTF-16 input (it's UTF-8)",
input: []byte("Hello World!"),
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4 changes: 3 additions & 1 deletion pkg/engine/engine.go
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Original file line number Diff line number Diff line change
Expand Up @@ -795,7 +795,9 @@ func (e *Engine) scannerWorker(ctx context.Context) {
sourceVerify := chunk.Verify
for _, decoder := range e.decoders {
decodeStart := time.Now()
decoded := decoder.FromChunk(chunk)
// This copy is needed to preserve the original chunk.Data across multiple decoders.
chunkCopy := *chunk
decoded := decoder.FromChunk(&chunkCopy)
decodeTime := time.Since(decodeStart).Microseconds()
decodeLatency.WithLabelValues(decoder.Type().String(), chunk.SourceName).Observe(float64(decodeTime))

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