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Improved file extraction error handling

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n1474335 2019-03-02 16:12:21 +00:00
parent 24a47445f6
commit 9fa7edffbf
2 changed files with 20 additions and 8 deletions
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6
src/core/lib/FileSignatures.mjs
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@ -1057,7 +1057,7 @@ export function extractJPEG(bytes, offset) {
while (stream.hasMore()) {
const marker = stream.getBytes(2);
if (marker[0] !== 0xff) throw new Error("Invalid JPEG marker: " + marker);
if (marker[0] !== 0xff) throw new Error(`Invalid marker while parsing JPEG at pos ${stream.position}: ${marker}`);
let segmentSize = 0;
switch (marker[1]) {
@ -1609,7 +1609,7 @@ function parseDEFLATE(stream) {
parseHuffmanBlock(stream, dynamicLiteralTable, dynamicDistanceTable);
} else {
throw new Error("Invalid block type");
throw new Error(`Invalid block type while parsing DEFLATE stream at pos ${stream.position}`);
}
}
@ -1712,7 +1712,7 @@ function readHuffmanCode(stream, table) {
const codeLength = codeWithLength >>> 16;
if (codeLength > maxCodeLength) {
throw new Error("Invalid code length: " + codeLength);
throw new Error(`Invalid Huffman Code length while parsing DEFLATE block at pos ${stream.position}: ${codeLength}`);
}
stream.moveBackwardsByBits(maxCodeLength - codeLength);