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Simplify magic bytes lookup slightly.

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git-svn-id: https://www.unprompted.com/svn/projects/tildefriends/trunk@4296 ed5197a5-7fde-0310-b194-c3ffbd925b24
This commit is contained in:
Cory McWilliams 2023-05-14 18:47:19 +00:00
parent 09c396d5a3
commit cc92d0e316
1 changed files with 32 additions and 37 deletions
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65
core/core.js
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@ -7,6 +7,29 @@ let gProcessIndex = 0;
let gProcesses = {};
let gStatsTimer = false;
const k_mime_types = {
'json': 'text/json',
'js': 'text/javascript',
'html': 'text/html',
'css': 'text/css',
'map': 'application/json',
};
const k_magic_bytes = [
{bytes: [0xff, 0xd8, 0xff, 0xdb], type: 'image/jpeg'},
{bytes: [0xff, 0xd8, 0xff, 0xe0, 0x00, 0x10, 0x4a, 0x46, 0x49, 0x46, 0x00, 0x01], type: 'image/jpeg'},
{bytes: [0xff, 0xd8, 0xff, 0xee], type: 'image/jpeg'},
{bytes: [0xff, 0xd8, 0xff, 0xe1, null, null, 0x45, 0x78, 0x69, 0x66, 0x00, 0x00], type: 'image/jpeg'},
{bytes: [0x89, 0x50, 0x4e, 0x47, 0x0d, 0x0a, 0x1a, 0x0a], type: 'image/png'},
{bytes: [0x47, 0x49, 0x46, 0x38, 0x37, 0x61], type: 'image/gif'},
{bytes: [0x47, 0x49, 0x46, 0x38, 0x39, 0x61], type: 'image/gif'},
{bytes: [0x52, 0x49, 0x46, 0x46, null, null, null, null, 0x57, 0x45, 0x42, 0x50], type: 'image/webp'},
{bytes: [0x3c, 0x73, 0x76, 0x67], type: 'image/svg+xml'},
{bytes: [null, null, null, null, 0x66, 0x74, 0x79, 0x70, 0x6d, 0x70, 0x34, 0x32], type: 'audio/mpeg'},
{bytes: [null, null, null, null, 0x66, 0x74, 0x79, 0x70, 0x69, 0x73, 0x6f, 0x6d], type: 'video/mp4'},
{bytes: [null, null, null, null, 0x66, 0x74, 0x79, 0x70, 0x6d, 0x70, 0x34, 0x32], type: 'video/mp4'},
];
const k_global_settings = {
index: {
type: 'string',
@ -488,14 +511,6 @@ async function staticFileHandler(request, response, blobId, uri) {
response.end("File not found");
}
const k_mime_types = {
'json': 'text/json',
'js': 'text/javascript',
'html': 'text/html',
'css': 'text/css',
'map': 'application/json',
};
async function staticDirectoryHandler(request, response, directory, uri) {
let filename = uri || 'index.html';
if (filename.indexOf('..') != -1) {
@ -539,36 +554,16 @@ async function wellKnownHandler(request, response, path) {
function sendData(response, data, type, headers) {
if (data) {
if (startsWithBytes(data, [0xff, 0xd8, 0xff, 0xdb]) ||
startsWithBytes(data, [0xff, 0xd8, 0xff, 0xe0, 0x00, 0x10, 0x4a, 0x46, 0x49, 0x46, 0x00, 0x01]) ||
startsWithBytes(data, [0xff, 0xd8, 0xff, 0xee]) ||
startsWithBytes(data, [0xff, 0xd8, 0xff, 0xe1, null, null, 0x45, 0x78, 0x69, 0x66, 0x00, 0x00])) {
response.writeHead(200, Object.assign({"Content-Type": "image/jpeg", "Content-Length": data.byteLength}, headers || {}));
for (let magic of k_magic_bytes) {
if (startsWithBytes(data, magic.bytes)) {
response.writeHead(200, Object.assign({"Content-Type": magic.content_type, "Content-Length": data.byteLength}, headers || {}));
response.end(data);
} else if (startsWithBytes(data, [0x89, 0x50, 0x4e, 0x47, 0x0d, 0x0a, 0x1a, 0x0a])) {
response.writeHead(200, Object.assign({"Content-Type": "image/png", "Content-Length": data.byteLength}, headers || {}));
response.end(data);
} else if (startsWithBytes(data, [0x47, 0x49, 0x46, 0x38, 0x37, 0x61]) ||
startsWithBytes(data, [0x47, 0x49, 0x46, 0x38, 0x39, 0x61])) {
response.writeHead(200, Object.assign({"Content-Type": "image/gif", "Content-Length": data.byteLength}, headers || {}));
response.end(data);
} else if (startsWithBytes(data, [0x52, 0x49, 0x46, 0x46, null, null, null, null, 0x57, 0x45, 0x42, 0x50])) {
response.writeHead(200, Object.assign({"Content-Type": "image/webp", "Content-Length": data.byteLength}, headers || {}));
response.end(data);
} else if (startsWithBytes(data, [0x3c, 0x73, 0x76, 0x67])) {
response.writeHead(200, Object.assign({"Content-Type": "image/svg+xml", "Content-Length": data.byteLength}, headers || {}));
response.end(data);
} else if (startsWithBytes(data, [null, null, null, null, 0x66, 0x74, 0x79, 0x70, 0x6d, 0x70, 0x34, 0x32])) {
response.writeHead(200, Object.assign({"Content-Type": "audio/mpeg", "Content-Length": data.byteLength}, headers || {}));
response.end(data);
} else if (startsWithBytes(data, [null, null, null, null, 0x66, 0x74, 0x79, 0x70, 0x69, 0x73, 0x6f, 0x6d]) ||
startsWithBytes(data, [null, null, null, null, 0x66, 0x74, 0x79, 0x70, 0x6d, 0x70, 0x34, 0x32])) {
response.writeHead(200, Object.assign({"Content-Type": "video/mp4", "Content-Length": data.byteLength}, headers || {}));
response.end(data);
} else {
return;
}
}
response.writeHead(200, Object.assign({"Content-Type": type || "application/binary", "Content-Length": data.byteLength}, headers || {}));
response.end(data);
}
} else {
response.writeHead(404, Object.assign({"Content-Type": "text/plain; charset=utf-8", "Content-Length": "File not found".length}, headers || {}));
response.end("File not found");