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src: Add support for AI files (Adobe Illustrator) #323

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merged 6 commits into from
Feb 4, 2020
Merged

src: Add support for AI files (Adobe Illustrator) #323

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9af0e7d
src: Add support for `.ai` files
vladfrangu Feb 3, 2020
61e0d52
src: Increase buffer read space in case of long file names
vladfrangu Feb 3, 2020
10faad4
src: Revert changes that fixed tests locally
vladfrangu Feb 4, 2020
ce1029c
src: Fix errors in tests
vladfrangu Feb 4, 2020
a857783
src: Do first requested change
vladfrangu Feb 4, 2020
dc45850
src: Another requested change
vladfrangu Feb 4, 2020
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3 changes: 2 additions & 1 deletion core.d.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -127,7 +127,8 @@ declare namespace core {
| 'mp1'
| 'it'
| 's3m'
| 'xm';
| 'xm'
| 'ai';

type MimeType =
| 'image/jpeg'
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20 changes: 20 additions & 0 deletions core.js
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Original file line number Diff line number Diff line change
Expand Up @@ -56,6 +56,15 @@ function _check(buffer, headers, options) {
return true;
}

async function _checkSequence(sequence, tokenizer, ignoreBytes) {
const buffer = Buffer.alloc(minimumBytes);
await tokenizer.ignore(ignoreBytes);

await tokenizer.peekBuffer(buffer, {length: 512, mayBeLess: true});

return buffer.includes(Buffer.from(sequence));
}

async function fromTokenizer(tokenizer) {
try {
return _fromTokenizer(tokenizer);
Expand All @@ -71,6 +80,7 @@ async function _fromTokenizer(tokenizer) {
const bytesRead = 12;
const check = (header, options) => _check(buffer, header, options);
const checkString = (header, options) => check(stringToBytes(header), options);
const checkSequence = (sequence, ignoreBytes) => _checkSequence(sequence, tokenizer, ignoreBytes);

// Keep reading until EOF if the file size is unknown.
if (!tokenizer.fileInfo.size) {
Expand Down Expand Up @@ -548,6 +558,16 @@ async function _fromTokenizer(tokenizer) {
}

if (checkString('%PDF')) {
// Check if this is an Adobe Illustrator file
const isAiFile = await checkSequence('Adobe Illustrator', 1350);
if (isAiFile) {
return {
ext: 'ai',
mime: 'application/postscript'
};
}

// Assume this is just a normal PDF
return {
ext: 'pdf',
mime: 'application/pdf'
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