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Refactored scanning for file types to be more than twice as fast.

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This commit is contained in:
n1474335 2019-01-01 15:12:01 +00:00
parent ede75530d0
commit 4c285bce57
3 changed files with 83 additions and 56 deletions
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26
src/core/operations/ExtractFiles.mjs
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@ -7,7 +7,7 @@
import Operation from "../Operation";
// import OperationError from "../errors/OperationError";
import Utils from "../Utils";
import {detectFileType, extractFile} from "../lib/FileType";
import {scanForFileTypes, extractFile} from "../lib/FileType";
/**
* Extract Files operation
@ -39,7 +39,7 @@ class ExtractFiles extends Operation {
const bytes = new Uint8Array(input);
// Scan for embedded files
const detectedFiles = scanForEmbeddedFiles(bytes);
const detectedFiles = scanForFileTypes(bytes);
// Extract each file that we support
const files = [];
@ -64,26 +64,4 @@ class ExtractFiles extends Operation {
}
/**
* TODO refactor
* @param data
*/
function scanForEmbeddedFiles(data) {
const detectedFiles = [];
for (let i = 0; i < data.length; i++) {
const fileDetails = detectFileType(data.slice(i));
if (fileDetails.length) {
fileDetails.forEach(match => {
detectedFiles.push({
offset: i,
fileDetails: match,
});
});
}
}
return detectedFiles;
}
export default ExtractFiles;