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195 lines
4.5 KiB
TypeScript
Executable file
195 lines
4.5 KiB
TypeScript
Executable file
#!/usr/bin/env deno --allow-net
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// This program serves files in the current directory over HTTP.
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// TODO Stream responses instead of reading them into memory.
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// TODO Add tests like these:
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// https://github.com/indexzero/http-server/blob/master/test/http-server-test.js
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import { listenAndServe, ServerRequest, setContentLength } from "./http";
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import { cwd, readFile, DenoError, ErrorKind, args, stat, readDir } from "deno";
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const dirViewerTemplate = `
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<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="UTF-8">
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<meta http-equiv="X-UA-Compatible" content="ie=edge">
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<title>Deno File Server</title>
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<style>
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td {
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padding: 0 1rem;
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}
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td.mode {
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font-family: Courier;
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}
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</style>
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</head>
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<body>
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<h1>Index of <%DIRNAME%></h1>
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<table>
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<tr><th>Mode</th><th>Size</th><th>Name</th></tr>
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<%CONTENTS%>
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</table>
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</body>
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</html>
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`;
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let currentDir = cwd();
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const target = args[1];
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if (target) {
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currentDir = `${currentDir}/${target}`;
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}
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const addr = `0.0.0.0:${args[2] || 4500}`;
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const encoder = new TextEncoder();
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function modeToString(isDir: boolean, maybeMode: number | null) {
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const modeMap = ["---", "--x", "-w-", "-wx", "r--", "r-x", "rw-", "rwx"];
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if (maybeMode === null) {
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return "(unknown mode)";
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}
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const mode = maybeMode!.toString(8);
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if (mode.length < 3) {
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return "(unknown mode)";
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}
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let output = "";
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mode
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.split("")
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.reverse()
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.slice(0, 3)
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.forEach(v => {
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output = modeMap[+v] + output;
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});
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output = `(${isDir ? "d" : "-"}${output})`;
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return output;
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}
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function fileLenToString(len: number) {
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const multipler = 1024;
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let base = 1;
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const suffix = ["B", "K", "M", "G", "T"];
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let suffixIndex = 0;
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while (base * multipler < len) {
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if (suffixIndex >= suffix.length - 1) {
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break;
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}
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base *= multipler;
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suffixIndex++;
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}
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return `${(len / base).toFixed(2)}${suffix[suffixIndex]}`;
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}
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function createDirEntryDisplay(
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name: string,
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path: string,
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size: number | null,
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mode: number | null,
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isDir: boolean
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) {
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const sizeStr = size === null ? "" : "" + fileLenToString(size!);
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return `
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<tr><td class="mode">${modeToString(
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isDir,
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mode
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)}</td><td>${sizeStr}</td><td><a href="${path}">${name}${
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isDir ? "/" : ""
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}</a></td>
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</tr>
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`;
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}
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// TODO: simplify this after deno.stat and deno.readDir are fixed
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async function serveDir(req: ServerRequest, dirPath: string, dirName: string) {
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// dirname has no prefix
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const listEntry: string[] = [];
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const fileInfos = await readDir(dirPath);
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for (const info of fileInfos) {
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if (info.name === "index.html" && info.isFile()) {
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// in case index.html as dir...
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await serveFile(req, info.path);
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return;
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}
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// Yuck!
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let mode = null;
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try {
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mode = (await stat(info.path)).mode;
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} catch (e) {}
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listEntry.push(
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createDirEntryDisplay(
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info.name,
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dirName + "/" + info.name,
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info.isFile() ? info.len : null,
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mode,
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info.isDirectory()
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)
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);
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}
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const page = new TextEncoder().encode(
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dirViewerTemplate
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.replace("<%DIRNAME%>", dirName + "/")
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.replace("<%CONTENTS%>", listEntry.join(""))
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);
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const headers = new Headers();
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headers.set("content-type", "text/html");
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const res = {
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status: 200,
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body: page,
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headers
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};
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setContentLength(res);
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await req.respond(res);
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}
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async function serveFile(req: ServerRequest, filename: string) {
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let file = await readFile(filename);
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const headers = new Headers();
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headers.set("content-type", "octet-stream");
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const res = {
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status: 200,
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body: file,
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headers
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};
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await req.respond(res);
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}
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async function serveFallback(req: ServerRequest, e: Error) {
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if (
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e instanceof DenoError &&
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(e as DenoError<any>).kind === ErrorKind.NotFound
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) {
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await req.respond({ status: 404, body: encoder.encode("Not found") });
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} else {
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await req.respond({
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status: 500,
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body: encoder.encode("Internal server error")
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});
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}
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}
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listenAndServe(addr, async req => {
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const fileName = req.url.replace(/\/$/, "");
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const filePath = currentDir + fileName;
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try {
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const fileInfo = await stat(filePath);
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if (fileInfo.isDirectory()) {
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// Bug with deno.stat: name and path not populated
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// Yuck!
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await serveDir(req, filePath, fileName);
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} else {
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await serveFile(req, filePath);
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}
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} catch (e) {
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await serveFallback(req, e);
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return;
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}
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});
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console.log(`HTTP server listening on http://${addr}/`);
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