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Let Parser_makeFilter return NullStream when an invalid stream is encountered (issue 3417)

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This commit is contained in:
Jonas Jenwald 2014-06-15 12:44:39 +02:00
parent 6f79aef03a
commit ab67e1c272
1 changed files with 54 additions and 49 deletions
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103
src/core/parser.js
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@ -344,58 +344,63 @@ var Parser = (function ParserClosure() {
if (stream.dict.get('Length') === 0) {
return new NullStream(stream);
}
var xrefStreamStats = this.xref.stats.streamTypes;
if (name == 'FlateDecode' || name == 'Fl') {
xrefStreamStats[StreamType.FLATE] = true;
if (params) {
return new PredictorStream(new FlateStream(stream, maybeLength),
maybeLength, params);
}
return new FlateStream(stream, maybeLength);
}
if (name == 'LZWDecode' || name == 'LZW') {
xrefStreamStats[StreamType.LZW] = true;
var earlyChange = 1;
if (params) {
if (params.has('EarlyChange')) {
earlyChange = params.get('EarlyChange');
try {
var xrefStreamStats = this.xref.stats.streamTypes;
if (name == 'FlateDecode' || name == 'Fl') {
xrefStreamStats[StreamType.FLATE] = true;
if (params) {
return new PredictorStream(new FlateStream(stream, maybeLength),
maybeLength, params);
}
return new PredictorStream(
new LZWStream(stream, maybeLength, earlyChange),
maybeLength, params);
return new FlateStream(stream, maybeLength);
}
return new LZWStream(stream, maybeLength, earlyChange);
if (name == 'LZWDecode' || name == 'LZW') {
xrefStreamStats[StreamType.LZW] = true;
var earlyChange = 1;
if (params) {
if (params.has('EarlyChange')) {
earlyChange = params.get('EarlyChange');
}
return new PredictorStream(
new LZWStream(stream, maybeLength, earlyChange),
maybeLength, params);
}
return new LZWStream(stream, maybeLength, earlyChange);
}
if (name == 'DCTDecode' || name == 'DCT') {
xrefStreamStats[StreamType.DCT] = true;
return new JpegStream(stream, maybeLength, stream.dict, this.xref);
}
if (name == 'JPXDecode' || name == 'JPX') {
xrefStreamStats[StreamType.JPX] = true;
return new JpxStream(stream, maybeLength, stream.dict);
}
if (name == 'ASCII85Decode' || name == 'A85') {
xrefStreamStats[StreamType.A85] = true;
return new Ascii85Stream(stream, maybeLength);
}
if (name == 'ASCIIHexDecode' || name == 'AHx') {
xrefStreamStats[StreamType.AHX] = true;
return new AsciiHexStream(stream, maybeLength);
}
if (name == 'CCITTFaxDecode' || name == 'CCF') {
xrefStreamStats[StreamType.CCF] = true;
return new CCITTFaxStream(stream, maybeLength, params);
}
if (name == 'RunLengthDecode' || name == 'RL') {
xrefStreamStats[StreamType.RL] = true;
return new RunLengthStream(stream, maybeLength);
}
if (name == 'JBIG2Decode') {
xrefStreamStats[StreamType.JBIG] = true;
return new Jbig2Stream(stream, maybeLength, stream.dict);
}
warn('filter "' + name + '" not supported yet');
return stream;
} catch (ex) {
warn('Invalid stream: \"' + ex + '\"');
return new NullStream(stream);
}
if (name == 'DCTDecode' || name == 'DCT') {
xrefStreamStats[StreamType.DCT] = true;
return new JpegStream(stream, maybeLength, stream.dict, this.xref);
}
if (name == 'JPXDecode' || name == 'JPX') {
xrefStreamStats[StreamType.JPX] = true;
return new JpxStream(stream, maybeLength, stream.dict);
}
if (name == 'ASCII85Decode' || name == 'A85') {
xrefStreamStats[StreamType.A85] = true;
return new Ascii85Stream(stream, maybeLength);
}
if (name == 'ASCIIHexDecode' || name == 'AHx') {
xrefStreamStats[StreamType.AHX] = true;
return new AsciiHexStream(stream, maybeLength);
}
if (name == 'CCITTFaxDecode' || name == 'CCF') {
xrefStreamStats[StreamType.CCF] = true;
return new CCITTFaxStream(stream, maybeLength, params);
}
if (name == 'RunLengthDecode' || name == 'RL') {
xrefStreamStats[StreamType.RL] = true;
return new RunLengthStream(stream, maybeLength);
}
if (name == 'JBIG2Decode') {
xrefStreamStats[StreamType.JBIG] = true;
return new Jbig2Stream(stream, maybeLength, stream.dict);
}
warn('filter "' + name + '" not supported yet');
return stream;
}
};