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Commit f0aee0671e84b627f90883c0f1fca8f0d4dbc9da

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Parents : 5f5fadb

Author : Chad Attermann <attermann@gmail.com>

Date : 2026-06-24T11:22:27-06:00

Fixed heatshrink decoding issue

Changes

1 files changed, 11 insertions(+), 2 deletions(-)

M webconsole/index.html +11 -2

Diff

diff --git a/webconsole/index.html b/webconsole/index.html

index 598b0e2..f9d81f3 100644

--- a/webconsole/index.html

+++ b/webconsole/index.html

@@ -1345,9 +1345,18 @@ function heatshrinkDecode(input){

// ranges 1..(2^lookahead_bits - 1) → real_length 2..(2^lb).

const offset = offRaw + 1;

const length = lenRaw + 1;

+ // The C encoder/decoder both pre-zero a (1<<HS_WINDOW_BITS) byte

+ // sliding window (memset in heatshrink_{en,de}coder.c::reset), and

+ // the encoder is allowed to emit backrefs that point into that

+ // zero region — i.e., "before" any byte has actually been emitted.

+ // Treat negative indices as that virtual zero source rather than

+ // bailing; bailing silently truncates every stream that compresses

+ // an early zero run (common for msgpack float64 metrics).

const start = out.length - offset;

- if (start < 0) break; // malformed input — bail rather than wrap

- for (let i = 0; i < length; i++) out.push(out[start + i]);

+ for (let i = 0; i < length; i++) {

+ const idx = start + i;

+ out.push(idx < 0 ? 0 : out[idx]);

+ }

}

return new Uint8Array(out);