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Significantly improved performance when scanning for embedded files by implementing a fastcheck algorithm.

This commit is contained in:
n1474335 2019-01-02 17:50:47 +00:00
parent 4c285bce57
commit a56f92cdee
2 changed files with 131 additions and 84 deletions
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148
package-lock.json generated
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"resolved": "https://registry.npmjs.org/pify/-/pify-2.3.0.tgz", "resolved": "http://registry.npmjs.org/pify/-/pify-2.3.0.tgz",
"integrity": "sha1-7RQaasBDqEnqWISY59yosVMw6Qw=", "integrity": "sha1-7RQaasBDqEnqWISY59yosVMw6Qw=",
"dev": true "dev": true
} }
@ -8102,7 +8102,7 @@
}, },
"media-typer": { "media-typer": {
"version": "0.3.0", "version": "0.3.0",
"resolved": "https://registry.npmjs.org/media-typer/-/media-typer-0.3.0.tgz", "resolved": "http://registry.npmjs.org/media-typer/-/media-typer-0.3.0.tgz",
"integrity": "sha1-hxDXrwqmJvj/+hzgAWhUUmMlV0g=", "integrity": "sha1-hxDXrwqmJvj/+hzgAWhUUmMlV0g=",
"dev": true "dev": true
}, },
@ -8161,7 +8161,7 @@
}, },
"meow": { "meow": {
"version": "3.7.0", "version": "3.7.0",
"resolved": "https://registry.npmjs.org/meow/-/meow-3.7.0.tgz", "resolved": "http://registry.npmjs.org/meow/-/meow-3.7.0.tgz",
"integrity": "sha1-cstmi0JSKCkKu/qFaJJYcwioAfs=", "integrity": "sha1-cstmi0JSKCkKu/qFaJJYcwioAfs=",
"dev": true, "dev": true,
"requires": { "requires": {
@ -8346,7 +8346,7 @@
}, },
"mkdirp": { "mkdirp": {
"version": "0.5.1", "version": "0.5.1",
"resolved": "https://registry.npmjs.org/mkdirp/-/mkdirp-0.5.1.tgz", "resolved": "http://registry.npmjs.org/mkdirp/-/mkdirp-0.5.1.tgz",
"integrity": "sha1-MAV0OOrGz3+MR2fzhkjWaX11yQM=", "integrity": "sha1-MAV0OOrGz3+MR2fzhkjWaX11yQM=",
"requires": { "requires": {
"minimist": "0.0.8" "minimist": "0.0.8"
@ -8556,7 +8556,7 @@
}, },
"ncp": { "ncp": {
"version": "1.0.1", "version": "1.0.1",
"resolved": "https://registry.npmjs.org/ncp/-/ncp-1.0.1.tgz", "resolved": "http://registry.npmjs.org/ncp/-/ncp-1.0.1.tgz",
"integrity": "sha1-0VNn5cuHQyuhF9K/gP30Wuz7QkY=", "integrity": "sha1-0VNn5cuHQyuhF9K/gP30Wuz7QkY=",
"dev": true "dev": true
}, },
@ -8655,7 +8655,7 @@
"dependencies": { "dependencies": {
"semver": { "semver": {
"version": "5.3.0", "version": "5.3.0",
"resolved": "https://registry.npmjs.org/semver/-/semver-5.3.0.tgz", "resolved": "http://registry.npmjs.org/semver/-/semver-5.3.0.tgz",
"integrity": "sha1-myzl094C0XxgEq0yaqa00M9U+U8=", "integrity": "sha1-myzl094C0XxgEq0yaqa00M9U+U8=",
"dev": true "dev": true
} }
@ -8827,7 +8827,7 @@
"dependencies": { "dependencies": {
"colors": { "colors": {
"version": "0.5.1", "version": "0.5.1",
"resolved": "https://registry.npmjs.org/colors/-/colors-0.5.1.tgz", "resolved": "http://registry.npmjs.org/colors/-/colors-0.5.1.tgz",
"integrity": "sha1-fQAj6usVTo7p/Oddy5I9DtFmd3Q=" "integrity": "sha1-fQAj6usVTo7p/Oddy5I9DtFmd3Q="
}, },
"underscore": { "underscore": {
@ -9121,13 +9121,13 @@
}, },
"os-homedir": { "os-homedir": {
"version": "1.0.2", "version": "1.0.2",
"resolved": "https://registry.npmjs.org/os-homedir/-/os-homedir-1.0.2.tgz", "resolved": "http://registry.npmjs.org/os-homedir/-/os-homedir-1.0.2.tgz",
"integrity": "sha1-/7xJiDNuDoM94MFox+8VISGqf7M=", "integrity": "sha1-/7xJiDNuDoM94MFox+8VISGqf7M=",
"dev": true "dev": true
}, },
"os-locale": { "os-locale": {
"version": "1.4.0", "version": "1.4.0",
"resolved": "https://registry.npmjs.org/os-locale/-/os-locale-1.4.0.tgz", "resolved": "http://registry.npmjs.org/os-locale/-/os-locale-1.4.0.tgz",
"integrity": "sha1-IPnxeuKe00XoveWDsT0gCYA8FNk=", "integrity": "sha1-IPnxeuKe00XoveWDsT0gCYA8FNk=",
"dev": true, "dev": true,
"requires": { "requires": {
@ -9136,7 +9136,7 @@
}, },
"os-tmpdir": { "os-tmpdir": {
"version": "1.0.2", "version": "1.0.2",
"resolved": "https://registry.npmjs.org/os-tmpdir/-/os-tmpdir-1.0.2.tgz", "resolved": "http://registry.npmjs.org/os-tmpdir/-/os-tmpdir-1.0.2.tgz",
"integrity": "sha1-u+Z0BseaqFxc/sdm/lc0VV36EnQ=", "integrity": "sha1-u+Z0BseaqFxc/sdm/lc0VV36EnQ=",
"dev": true "dev": true
}, },
@ -9351,7 +9351,7 @@
}, },
"parse-asn1": { "parse-asn1": {
"version": "5.1.1", "version": "5.1.1",
"resolved": "https://registry.npmjs.org/parse-asn1/-/parse-asn1-5.1.1.tgz", "resolved": "http://registry.npmjs.org/parse-asn1/-/parse-asn1-5.1.1.tgz",
"integrity": "sha512-KPx7flKXg775zZpnp9SxJlz00gTd4BmJ2yJufSc44gMCRrRQ7NSzAcSJQfifuOLgW6bEi+ftrALtsgALeB2Adw==", "integrity": "sha512-KPx7flKXg775zZpnp9SxJlz00gTd4BmJ2yJufSc44gMCRrRQ7NSzAcSJQfifuOLgW6bEi+ftrALtsgALeB2Adw==",
"dev": true, "dev": true,
"requires": { "requires": {
@ -9437,7 +9437,7 @@
}, },
"path-is-absolute": { "path-is-absolute": {
"version": "1.0.1", "version": "1.0.1",
"resolved": "https://registry.npmjs.org/path-is-absolute/-/path-is-absolute-1.0.1.tgz", "resolved": "http://registry.npmjs.org/path-is-absolute/-/path-is-absolute-1.0.1.tgz",
"integrity": "sha1-F0uSaHNVNP+8es5r9TpanhtcX18=", "integrity": "sha1-F0uSaHNVNP+8es5r9TpanhtcX18=",
"dev": true "dev": true
}, },
@ -9478,7 +9478,7 @@
"dependencies": { "dependencies": {
"pify": { "pify": {
"version": "2.3.0", "version": "2.3.0",
"resolved": "https://registry.npmjs.org/pify/-/pify-2.3.0.tgz", "resolved": "http://registry.npmjs.org/pify/-/pify-2.3.0.tgz",
"integrity": "sha1-7RQaasBDqEnqWISY59yosVMw6Qw=", "integrity": "sha1-7RQaasBDqEnqWISY59yosVMw6Qw=",
"dev": true "dev": true
} }
@ -9661,7 +9661,7 @@
"dependencies": { "dependencies": {
"async": { "async": {
"version": "1.5.2", "version": "1.5.2",
"resolved": "https://registry.npmjs.org/async/-/async-1.5.2.tgz", "resolved": "http://registry.npmjs.org/async/-/async-1.5.2.tgz",
"integrity": "sha1-7GphrlZIDAw8skHJVhjiCJL5Zyo=", "integrity": "sha1-7GphrlZIDAw8skHJVhjiCJL5Zyo=",
"dev": true "dev": true
} }
@ -10073,7 +10073,7 @@
}, },
"progress": { "progress": {
"version": "1.1.8", "version": "1.1.8",
"resolved": "https://registry.npmjs.org/progress/-/progress-1.1.8.tgz", "resolved": "http://registry.npmjs.org/progress/-/progress-1.1.8.tgz",
"integrity": "sha1-4mDHj2Fhzdmw5WzD4Khd4Xx6V74=" "integrity": "sha1-4mDHj2Fhzdmw5WzD4Khd4Xx6V74="
}, },
"promise-inflight": { "promise-inflight": {
@ -10098,13 +10098,13 @@
"dependencies": { "dependencies": {
"async": { "async": {
"version": "1.0.0", "version": "1.0.0",
"resolved": "https://registry.npmjs.org/async/-/async-1.0.0.tgz", "resolved": "http://registry.npmjs.org/async/-/async-1.0.0.tgz",
"integrity": "sha1-+PwEyjoTeErenhZBr5hXjPvWR6k=", "integrity": "sha1-+PwEyjoTeErenhZBr5hXjPvWR6k=",
"dev": true "dev": true
}, },
"winston": { "winston": {
"version": "2.1.1", "version": "2.1.1",
"resolved": "https://registry.npmjs.org/winston/-/winston-2.1.1.tgz", "resolved": "http://registry.npmjs.org/winston/-/winston-2.1.1.tgz",
"integrity": "sha1-PJNJ0ZYgf9G9/51LxD73JRDjoS4=", "integrity": "sha1-PJNJ0ZYgf9G9/51LxD73JRDjoS4=",
"dev": true, "dev": true,
"requires": { "requires": {
@ -10119,7 +10119,7 @@
"dependencies": { "dependencies": {
"colors": { "colors": {
"version": "1.0.3", "version": "1.0.3",
"resolved": "https://registry.npmjs.org/colors/-/colors-1.0.3.tgz", "resolved": "http://registry.npmjs.org/colors/-/colors-1.0.3.tgz",
"integrity": "sha1-BDP0TYCWgP3rYO0mDxsMJi6CpAs=", "integrity": "sha1-BDP0TYCWgP3rYO0mDxsMJi6CpAs=",
"dev": true "dev": true
}, },
@ -10342,7 +10342,7 @@
"dependencies": { "dependencies": {
"pify": { "pify": {
"version": "2.3.0", "version": "2.3.0",
"resolved": "https://registry.npmjs.org/pify/-/pify-2.3.0.tgz", "resolved": "http://registry.npmjs.org/pify/-/pify-2.3.0.tgz",
"integrity": "sha1-7RQaasBDqEnqWISY59yosVMw6Qw=", "integrity": "sha1-7RQaasBDqEnqWISY59yosVMw6Qw=",
"dev": true "dev": true
} }
@ -10531,7 +10531,7 @@
"dependencies": { "dependencies": {
"jsesc": { "jsesc": {
"version": "0.5.0", "version": "0.5.0",
"resolved": "https://registry.npmjs.org/jsesc/-/jsesc-0.5.0.tgz", "resolved": "http://registry.npmjs.org/jsesc/-/jsesc-0.5.0.tgz",
"integrity": "sha1-597mbjXW/Bb3EP6R1c9p9w8IkR0=", "integrity": "sha1-597mbjXW/Bb3EP6R1c9p9w8IkR0=",
"dev": true "dev": true
} }
@ -10582,7 +10582,7 @@
}, },
"htmlparser2": { "htmlparser2": {
"version": "3.3.0", "version": "3.3.0",
"resolved": "https://registry.npmjs.org/htmlparser2/-/htmlparser2-3.3.0.tgz", "resolved": "http://registry.npmjs.org/htmlparser2/-/htmlparser2-3.3.0.tgz",
"integrity": "sha1-zHDQWln2VC5D8OaFyYLhTJJKnv4=", "integrity": "sha1-zHDQWln2VC5D8OaFyYLhTJJKnv4=",
"dev": true, "dev": true,
"requires": { "requires": {
@ -10594,7 +10594,7 @@
}, },
"readable-stream": { "readable-stream": {
"version": "1.0.34", "version": "1.0.34",
"resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-1.0.34.tgz", "resolved": "http://registry.npmjs.org/readable-stream/-/readable-stream-1.0.34.tgz",
"integrity": "sha1-Elgg40vIQtLyqq+v5MKRbuMsFXw=", "integrity": "sha1-Elgg40vIQtLyqq+v5MKRbuMsFXw=",
"dev": true, "dev": true,
"requires": { "requires": {
@ -10704,7 +10704,7 @@
}, },
"require-uncached": { "require-uncached": {
"version": "1.0.3", "version": "1.0.3",
"resolved": "https://registry.npmjs.org/require-uncached/-/require-uncached-1.0.3.tgz", "resolved": "http://registry.npmjs.org/require-uncached/-/require-uncached-1.0.3.tgz",
"integrity": "sha1-Tg1W1slmL9MeQwEcS5WqSZVUIdM=", "integrity": "sha1-Tg1W1slmL9MeQwEcS5WqSZVUIdM=",
"dev": true, "dev": true,
"requires": { "requires": {
@ -10871,7 +10871,7 @@
}, },
"safe-regex": { "safe-regex": {
"version": "1.1.0", "version": "1.1.0",
"resolved": "https://registry.npmjs.org/safe-regex/-/safe-regex-1.1.0.tgz", "resolved": "http://registry.npmjs.org/safe-regex/-/safe-regex-1.1.0.tgz",
"integrity": "sha1-QKNmnzsHfR6UPURinhV91IAjvy4=", "integrity": "sha1-QKNmnzsHfR6UPURinhV91IAjvy4=",
"dev": true, "dev": true,
"requires": { "requires": {
@ -11191,7 +11191,7 @@
}, },
"sha.js": { "sha.js": {
"version": "2.4.11", "version": "2.4.11",
"resolved": "https://registry.npmjs.org/sha.js/-/sha.js-2.4.11.tgz", "resolved": "http://registry.npmjs.org/sha.js/-/sha.js-2.4.11.tgz",
"integrity": "sha512-QMEp5B7cftE7APOjk5Y6xgrbWu+WkLVQwk8JNjZ8nKRciZaByEW6MubieAiToS7+dwvrjGhH8jRXz3MVd0AYqQ==", "integrity": "sha512-QMEp5B7cftE7APOjk5Y6xgrbWu+WkLVQwk8JNjZ8nKRciZaByEW6MubieAiToS7+dwvrjGhH8jRXz3MVd0AYqQ==",
"dev": true, "dev": true,
"requires": { "requires": {
@ -11235,7 +11235,7 @@
}, },
"shelljs": { "shelljs": {
"version": "0.3.0", "version": "0.3.0",
"resolved": "https://registry.npmjs.org/shelljs/-/shelljs-0.3.0.tgz", "resolved": "http://registry.npmjs.org/shelljs/-/shelljs-0.3.0.tgz",
"integrity": "sha1-NZbmMHp4FUT1kfN9phg2DzHbV7E=", "integrity": "sha1-NZbmMHp4FUT1kfN9phg2DzHbV7E=",
"dev": true "dev": true
}, },
@ -11913,7 +11913,7 @@
}, },
"strip-ansi": { "strip-ansi": {
"version": "3.0.1", "version": "3.0.1",
"resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-3.0.1.tgz", "resolved": "http://registry.npmjs.org/strip-ansi/-/strip-ansi-3.0.1.tgz",
"integrity": "sha1-ajhfuIU9lS1f8F0Oiq+UJ43GPc8=", "integrity": "sha1-ajhfuIU9lS1f8F0Oiq+UJ43GPc8=",
"requires": { "requires": {
"ansi-regex": "^2.0.0" "ansi-regex": "^2.0.0"
@ -11930,7 +11930,7 @@
}, },
"strip-eof": { "strip-eof": {
"version": "1.0.0", "version": "1.0.0",
"resolved": "https://registry.npmjs.org/strip-eof/-/strip-eof-1.0.0.tgz", "resolved": "http://registry.npmjs.org/strip-eof/-/strip-eof-1.0.0.tgz",
"integrity": "sha1-u0P/VZim6wXYm1n80SnJgzE2Br8=", "integrity": "sha1-u0P/VZim6wXYm1n80SnJgzE2Br8=",
"dev": true "dev": true
}, },
@ -12009,7 +12009,7 @@
}, },
"tar": { "tar": {
"version": "2.2.1", "version": "2.2.1",
"resolved": "https://registry.npmjs.org/tar/-/tar-2.2.1.tgz", "resolved": "http://registry.npmjs.org/tar/-/tar-2.2.1.tgz",
"integrity": "sha1-jk0qJWwOIYXGsYrWlK7JaLg8sdE=", "integrity": "sha1-jk0qJWwOIYXGsYrWlK7JaLg8sdE=",
"dev": true, "dev": true,
"requires": { "requires": {
@ -12064,7 +12064,7 @@
}, },
"through": { "through": {
"version": "2.3.8", "version": "2.3.8",
"resolved": "https://registry.npmjs.org/through/-/through-2.3.8.tgz", "resolved": "http://registry.npmjs.org/through/-/through-2.3.8.tgz",
"integrity": "sha1-DdTJ/6q8NXlgsbckEV1+Doai4fU=", "integrity": "sha1-DdTJ/6q8NXlgsbckEV1+Doai4fU=",
"dev": true "dev": true
}, },
@ -12758,7 +12758,7 @@
"dependencies": { "dependencies": {
"async": { "async": {
"version": "0.9.2", "version": "0.9.2",
"resolved": "https://registry.npmjs.org/async/-/async-0.9.2.tgz", "resolved": "http://registry.npmjs.org/async/-/async-0.9.2.tgz",
"integrity": "sha1-rqdNXmHB+JlhO/ZL2mbUx48v0X0=", "integrity": "sha1-rqdNXmHB+JlhO/ZL2mbUx48v0X0=",
"dev": true "dev": true
}, },
@ -12784,7 +12784,7 @@
}, },
"valid-data-url": { "valid-data-url": {
"version": "0.1.6", "version": "0.1.6",
"resolved": "https://registry.npmjs.org/valid-data-url/-/valid-data-url-0.1.6.tgz", "resolved": "http://registry.npmjs.org/valid-data-url/-/valid-data-url-0.1.6.tgz",
"integrity": "sha512-FXg2qXMzfAhZc0y2HzELNfUeiOjPr+52hU1DNBWiJJ2luXD+dD1R9NA48Ug5aj0ibbxroeGDc/RJv6ThiGgkDw==", "integrity": "sha512-FXg2qXMzfAhZc0y2HzELNfUeiOjPr+52hU1DNBWiJJ2luXD+dD1R9NA48Ug5aj0ibbxroeGDc/RJv6ThiGgkDw==",
"dev": true "dev": true
}, },
@ -12800,7 +12800,7 @@
}, },
"validator": { "validator": {
"version": "9.4.1", "version": "9.4.1",
"resolved": "https://registry.npmjs.org/validator/-/validator-9.4.1.tgz", "resolved": "http://registry.npmjs.org/validator/-/validator-9.4.1.tgz",
"integrity": "sha512-YV5KjzvRmSyJ1ee/Dm5UED0G+1L4GZnLN3w6/T+zZm8scVua4sOhYKWTUrKa0H/tMiJyO9QLHMPN+9mB/aMunA==", "integrity": "sha512-YV5KjzvRmSyJ1ee/Dm5UED0G+1L4GZnLN3w6/T+zZm8scVua4sOhYKWTUrKa0H/tMiJyO9QLHMPN+9mB/aMunA==",
"dev": true "dev": true
}, },
@ -13296,7 +13296,7 @@
}, },
"webpack-node-externals": { "webpack-node-externals": {
"version": "1.7.2", "version": "1.7.2",
"resolved": "https://registry.npmjs.org/webpack-node-externals/-/webpack-node-externals-1.7.2.tgz", "resolved": "http://registry.npmjs.org/webpack-node-externals/-/webpack-node-externals-1.7.2.tgz",
"integrity": "sha512-ajerHZ+BJKeCLviLUUmnyd5B4RavLF76uv3cs6KNuO8W+HuQaEs0y0L7o40NQxdPy5w0pcv8Ew7yPUAQG0UdCg==", "integrity": "sha512-ajerHZ+BJKeCLviLUUmnyd5B4RavLF76uv3cs6KNuO8W+HuQaEs0y0L7o40NQxdPy5w0pcv8Ew7yPUAQG0UdCg==",
"dev": true "dev": true
}, },
@ -13450,14 +13450,14 @@
"dependencies": { "dependencies": {
"async": { "async": {
"version": "1.0.0", "version": "1.0.0",
"resolved": "https://registry.npmjs.org/async/-/async-1.0.0.tgz", "resolved": "http://registry.npmjs.org/async/-/async-1.0.0.tgz",
"integrity": "sha1-+PwEyjoTeErenhZBr5hXjPvWR6k=", "integrity": "sha1-+PwEyjoTeErenhZBr5hXjPvWR6k=",
"dev": true, "dev": true,
"optional": true "optional": true
}, },
"colors": { "colors": {
"version": "1.0.3", "version": "1.0.3",
"resolved": "https://registry.npmjs.org/colors/-/colors-1.0.3.tgz", "resolved": "http://registry.npmjs.org/colors/-/colors-1.0.3.tgz",
"integrity": "sha1-BDP0TYCWgP3rYO0mDxsMJi6CpAs=", "integrity": "sha1-BDP0TYCWgP3rYO0mDxsMJi6CpAs=",
"dev": true, "dev": true,
"optional": true "optional": true
@ -13490,7 +13490,7 @@
}, },
"wrap-ansi": { "wrap-ansi": {
"version": "2.1.0", "version": "2.1.0",
"resolved": "https://registry.npmjs.org/wrap-ansi/-/wrap-ansi-2.1.0.tgz", "resolved": "http://registry.npmjs.org/wrap-ansi/-/wrap-ansi-2.1.0.tgz",
"integrity": "sha1-2Pw9KE3QV5T+hJc8rs3Rz4JP3YU=", "integrity": "sha1-2Pw9KE3QV5T+hJc8rs3Rz4JP3YU=",
"dev": true, "dev": true,
"requires": { "requires": {

67
src/core/lib/FileType.mjs
View File

@ -128,17 +128,58 @@ export function scanForFileTypes(buf) {
for (let i = 0; i < category.length; i++) { for (let i = 0; i < category.length; i++) {
const filetype = category[i]; const filetype = category[i];
for (let pos = 0; pos < buf.length; pos++) { const sigs = filetype.signature.length ? filetype.signature : [filetype.signature];
if (signatureMatches(filetype.signature, buf, pos)) {
foundFiles.push({ sigs.forEach(sig => {
offset: pos, let pos = 0;
fileDetails: filetype while ((pos = locatePotentialSig(buf, sig, pos)) >= 0) {
}); if (signatureMatches(sig, buf, pos)) {
foundFiles.push({
offset: pos,
fileDetails: filetype
});
}
pos++;
} }
} });
} }
} }
return foundFiles;
// Return found files in order of increasing offset
return foundFiles.sort((a, b) => {
return a.offset - b.offset;
});
}
/**
* Fastcheck function to quickly scan the buffer for the first byte in a signature.
*
* @param {Uint8Array} buf - The buffer to search
* @param {Object} sig - A single signature object (Not an array of signatures)
* @param {number} offset - Where to start search from
* @returs {number} The position of the match or -1 if one cannot be found.
*/
function locatePotentialSig(buf, sig, offset) {
// Find values for first key and value in sig
const k = parseInt(Object.keys(sig)[0], 10);
const v = Object.values(sig)[0];
switch (typeof v) {
case "number":
return buf.indexOf(v, offset + k) - k;
case "object":
for (let i = offset + k; i < buf.length; i++) {
if (v.indexOf(buf[i]) >= 0) return i - k;
}
return -1;
case "function":
for (let i = offset + k; i < buf.length; i++) {
if (v(buf[i])) return i - k;
}
return -1;
default:
throw new Error("Unrecognised signature type");
}
} }
@ -155,9 +196,15 @@ export function isType(type, buf) {
if (!(types && types.length)) return false; if (!(types && types.length)) return false;
if (typeof type === "string") { if (typeof type === "string") {
return types[0].mime.startsWith(type) ? types[0].mime : false; return types.reduce((acc, t) => {
const mime = t.mime.startsWith(type) ? t.mime : false;
return acc || mime;
}, false);
} else if (type instanceof RegExp) { } else if (type instanceof RegExp) {
return type.test(types[0].mime) ? types[0].mime : false; return types.reduce((acc, t) => {
const mime = type.test(t.mime) ? t.mime : false;
return acc || mime;
}, false);
} else { } else {
throw new Error("Invalid type input."); throw new Error("Invalid type input.");
} }