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Fix line endings

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This commit is contained in:
Tarrgon
2026-05-29 08:43:48 -04:00
parent 66d4bd4926
commit 6ad3ee5f23
98 changed files with 6528 additions and 6528 deletions
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src/utils/file-utils.ts
+70 -70
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@@ -1,71 +1,71 @@
import crypto from 'crypto';
const DISCORD_PNG_ADDITIONAL_BYTE_LENGTH = 26;
const END_PNG_BYTES = 12;
const DISCORD_JPG_START_OFFSET = 3;
const DISCORD_JPG_REMOVE_BYTE_LENGTH = 23;
const DISCORD_JPG_REINSERT = Buffer.from([0xE0, 0x00, 0x10, 0x4A, 0x46, 0x49, 0x46, 0x00, 0x01, 0x01, 0x00, 0x00, 0x01, 0x00, 0x01, 0x00, 0x00]);
const DISCORD_JPG_REINSERT_BYTE_LENGTH = DISCORD_JPG_REINSERT.byteLength;
export const ALLOWED_MIMETYPES = ['image/png', 'image/jpg', 'image/jpeg', 'image/gif', 'video/mp4', 'video/webm'];
export function calculateMD5(data: Buffer): string {
return crypto.createHash('md5').update(data).digest('hex');
}
// Downloads a file from discord's CDN and reverts the changes they do to the file.
// Returns both the corrected version at index 0, and the original version from discord at index 1.
export async function downloadFile(url: string): Promise<Buffer[] | null> {
try {
const res = await fetch(url);
const mimeType = res.headers.get('Content-Type')!;
if (!ALLOWED_MIMETYPES.includes(mimeType)) return null;
const data = await res.arrayBuffer();
let finalData: Buffer;
if (mimeType == 'image/png') {
const startOffset = data.byteLength - DISCORD_PNG_ADDITIONAL_BYTE_LENGTH - END_PNG_BYTES;
const correctedData = Buffer.alloc(data.byteLength - DISCORD_PNG_ADDITIONAL_BYTE_LENGTH);
const buff = Buffer.from(data);
buff.copy(correctedData, 0, 0, startOffset);
buff.copy(correctedData, startOffset, startOffset + DISCORD_PNG_ADDITIONAL_BYTE_LENGTH);
finalData = correctedData;
} else if (mimeType == 'image/jpg' || mimeType == 'image/jpeg') {
const correctedData = Buffer.alloc(data.byteLength - DISCORD_JPG_REMOVE_BYTE_LENGTH + DISCORD_JPG_REINSERT_BYTE_LENGTH);
const buff = Buffer.from(data);
buff.copy(correctedData, 0, 0, DISCORD_JPG_START_OFFSET);
DISCORD_JPG_REINSERT.copy(correctedData, DISCORD_JPG_START_OFFSET);
buff.copy(correctedData, DISCORD_JPG_REMOVE_BYTE_LENGTH - DISCORD_JPG_START_OFFSET, DISCORD_JPG_START_OFFSET + DISCORD_JPG_REMOVE_BYTE_LENGTH);
finalData = correctedData;
} else {
finalData = Buffer.from(data);
}
return [finalData, Buffer.from(data)];
} catch (e) {
console.error(e);
return null;
}
}
// This method is used with discord CDN URLs.
// Discord does slight modifications to the data, which will change the MD5, this method reverts those changes.
export async function calculateMD5FromURL(url: string): Promise<{ correctedFileMD5: string, originalFileMD5: string } | null> {
try {
const files = await downloadFile(url);
if (!files) return null;
return {
correctedFileMD5: calculateMD5(files[0]),
originalFileMD5: calculateMD5(files[1])
};
} catch (e) {
console.error(e);
return null;
}
import crypto from 'crypto';
const DISCORD_PNG_ADDITIONAL_BYTE_LENGTH = 26;
const END_PNG_BYTES = 12;
const DISCORD_JPG_START_OFFSET = 3;
const DISCORD_JPG_REMOVE_BYTE_LENGTH = 23;
const DISCORD_JPG_REINSERT = Buffer.from([0xE0, 0x00, 0x10, 0x4A, 0x46, 0x49, 0x46, 0x00, 0x01, 0x01, 0x00, 0x00, 0x01, 0x00, 0x01, 0x00, 0x00]);
const DISCORD_JPG_REINSERT_BYTE_LENGTH = DISCORD_JPG_REINSERT.byteLength;
export const ALLOWED_MIMETYPES = ['image/png', 'image/jpg', 'image/jpeg', 'image/gif', 'video/mp4', 'video/webm'];
export function calculateMD5(data: Buffer): string {
return crypto.createHash('md5').update(data).digest('hex');
}
// Downloads a file from discord's CDN and reverts the changes they do to the file.
// Returns both the corrected version at index 0, and the original version from discord at index 1.
export async function downloadFile(url: string): Promise<Buffer[] | null> {
try {
const res = await fetch(url);
const mimeType = res.headers.get('Content-Type')!;
if (!ALLOWED_MIMETYPES.includes(mimeType)) return null;
const data = await res.arrayBuffer();
let finalData: Buffer;
if (mimeType == 'image/png') {
const startOffset = data.byteLength - DISCORD_PNG_ADDITIONAL_BYTE_LENGTH - END_PNG_BYTES;
const correctedData = Buffer.alloc(data.byteLength - DISCORD_PNG_ADDITIONAL_BYTE_LENGTH);
const buff = Buffer.from(data);
buff.copy(correctedData, 0, 0, startOffset);
buff.copy(correctedData, startOffset, startOffset + DISCORD_PNG_ADDITIONAL_BYTE_LENGTH);
finalData = correctedData;
} else if (mimeType == 'image/jpg' || mimeType == 'image/jpeg') {
const correctedData = Buffer.alloc(data.byteLength - DISCORD_JPG_REMOVE_BYTE_LENGTH + DISCORD_JPG_REINSERT_BYTE_LENGTH);
const buff = Buffer.from(data);
buff.copy(correctedData, 0, 0, DISCORD_JPG_START_OFFSET);
DISCORD_JPG_REINSERT.copy(correctedData, DISCORD_JPG_START_OFFSET);
buff.copy(correctedData, DISCORD_JPG_REMOVE_BYTE_LENGTH - DISCORD_JPG_START_OFFSET, DISCORD_JPG_START_OFFSET + DISCORD_JPG_REMOVE_BYTE_LENGTH);
finalData = correctedData;
} else {
finalData = Buffer.from(data);
}
return [finalData, Buffer.from(data)];
} catch (e) {
console.error(e);
return null;
}
}
// This method is used with discord CDN URLs.
// Discord does slight modifications to the data, which will change the MD5, this method reverts those changes.
export async function calculateMD5FromURL(url: string): Promise<{ correctedFileMD5: string, originalFileMD5: string } | null> {
try {
const files = await downloadFile(url);
if (!files) return null;
return {
correctedFileMD5: calculateMD5(files[0]),
originalFileMD5: calculateMD5(files[1])
};
} catch (e) {
console.error(e);
return null;
}
}