A fast and optimized middleware server with an absurdly small amount of code (300 lines) built on top of Deno's native HTTP APIs with no dependencies. It also has a collection of useful middlewares: log file, serve static, CORS, session, rate limit, token, body parsers, redirect, proxy and handle upload. In "README" there are examples of all the resources. Faster's ideology is: all you need is an optimized middleware manager, all other functionality is middleware.
The middleware is built on top of Deno's native HTTP APIs, see the benchmarks ('hello word' server):
Machine: 8 GiB, Intel® Core™ i5-10210U CPU @ 2.11GHz × 4
method: autocannon -c 100 -d 40 -p 10 localhost:80. Deno v1.19.3, Ubuntu
20.04 LTS.
| Framework | Version | Router? | Results |
|---|---|---|---|
| Express | 4.17.3 | ✓ | 167k requests in 40.11s, 29 MB read |
| Fastify | 3.27.4 | ✓ | 1105k requests in 40.07s ,193 MB read |
| Oak | 10.4.0 | ✓ | 260k requests in 40.09s, 45 MB read |
| Faster | 5.7 | ✓ | 1432k requests in 40.17s, 250 MB read |
Note that in addition to performance, Faster is a very complete framework considering its middleware collection.
Static (/foo, /foo/bar)
Parameter (/:title, /books/:title, /books/:genre/:title)
Parameter w/ Suffix (/movies/:title.mp4, /movies/:title.(mp4|mov))
Optional Parameters (/:title?, /books/:title?, /books/:genre/:title?)
Wildcards (*, /books/*, /books/:genre/*)
import { req, res, Server } from "https://deno.land/x/faster/mod.ts";
const server = new Server();
server.post(
"/example_json",
res("json"),
req("json"),
async (ctx: any, next: any) => {
console.log(ctx.body);
ctx.res.body = { msg: "json response example" };
await next();
},
);
await server.listen({ port: 80 });server.get(
"/example_html",
res("html"),
async (ctx: any, next: any) => {
ctx.res.body = `
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>title example</title>
</head>
</body>
HTML body example
<body>
</html>
`;
await next();
},
);server.get(
"/example_params/:ex1?foo=bar",
async (ctx: any, next: any) => {
console.log(ctx.params.ex1);
console.log(ctx.url.searchParams.get("foo")); //you can explore the URL (ctx.url) object
await next();
},
);import {
Cookie,
deleteCookie,
getCookies,
Server,
setCookie,
} from "https://deno.land/x/faster/mod.ts"; //alias to deno std
server.get(
"/cookies",
async (ctx: any, next: any) => {
setCookie(ctx.res.headers, { name: "user_name", value: "San" }); //explore interface 'Cookie' for more options
deleteCookie(ctx.res.headers, "last_order");
console.log(getCookies(ctx.req.headers));
await next();
},
);server.get(
"/redirect_example",
async (ctx: any, next: any) => {
ctx.redirect("/my_custom_url_or_path");
await next();
},
);This project has a standard set of middleware useful for most cases.
Example:
server.use(logger());You can pass custom log file:
logger("./my_dir/my_custom_log.txt");Example:
server.post(
"/example_parsers",
res("json"), //Response parser
req("json"), //Request parser
async (ctx: any, next: any) => {
console.log(ctx.body); //the original (no parser) body is in ctx.req.body
ctx.res.body = { msg: "json response example" };
await next();
},
);The current supported options for "req" are: "arrayBuffer", "blob", "formData", "json", "text".
The current supported options for "res" are: "json", "html", "javascript".
If there are no parsers for your data, don't worry, you can handle the data manually, Ex:
server.post(
"/upload",
async (ctx: any, next: any) => {
ctx.res.headers.set(
"Content-Type",
"application/json",
);
const data = await exCustomParseBody(ctx.req.body); //do what you want with ctx.req.body
ctx.res.body = JSON.stringify({ msg: "ok" }); // //ctx.res.body can also be other data types such as streams, bytes and etc.
await next();
},
);Example:
server.use(rateLimit());OPTIONS (with default values):
rateLimit({
attempts: 30,
interval: 10,
maxTableSize: 100000,
id: (ctx: Context) => JSON.stringify(ctx.conn.remoteAddr),
});Example (must end with "/*"):
server.get(
"/pub/*",
serveStatic("./pub"),
);Example:
server.options("/example_cors", setCORS()); //enable pre-fligh request
server.get(
"/example_cors",
setCORS(),
async (ctx, next) => {
await next();
},
);You can pass valid hosts to cors function:
setCORS("http://my.custom.url:8080");This middleware is encapsulated in an entire static class. It uses Bearer Token and default options with the "HS256" algorithm, and generates a random secret when starting the application (you can also set a secret manually). Ex:
server.get(
"/example_verify_token", //send token to server in Header => Authorization: Bearer TOKEN
Token.middleware,
async (ctx, next) => {
console.log(ctx.extra.tokenPayload);
console.log(ctx.extra.token);
await next();
},
);Generate Token ex:
await Token.generate({ user_id: "172746" }, null); //null to never expire, this parameter defaults to "1h"Set secret ex:
Token.setSecret("a3d2r366wgb3dh6yrwzw99kzx2"); //Do this at the beginning of your applicationGet token payload out of middleware:
await Token.getPayload("YOUR_TOKEN_STRING"); //Ex: use for get token data from token string in URL parameter.You can also use the static method Token.setConfigs.
Ex:
server.get(
"/my_url_1",
redirect("/my_url_2"), //or the full url
);Ex:
server.use(session());
//in routes:
server.get(
"/session_example",
async (ctx, next) => {
console.log(ctx.extra.session); //get session data
ctx.extra.session.foo = "bar"; //set session data
await next();
},
);OPTIONS (with default values):
session(engine: SessionStorageEngine = new SQLiteStorageEngine(60)) //60 is 60 minutes to expire session
Ex:
server.use(proxy({ url: "https://my-url-example.com" }));In routes:
server.get(
"/proxy_example",
async (ctx, next) => {
console.log(ctx.req); //req has changed as it now points to the proxy
console.log(ctx.res); //res has changed because now it has the proxy answer
//OR if replaceReqAndRes = false
console.log(ctx.extra.proxyReq);
console.log(ctx.extra.proxyRes);
await next();
},
);Or proxy in specific route:
server.get(
"/proxy_example",
proxy({
url: "https://my-url-example.com/proxy_ex2",
replaceProxyPath: false, //specific proxy route for the route "/proxy_example"
}),
async (ctx, next) => {
console.log(ctx.req); //req has changed as it now points to the proxy
console.log(ctx.res); //res has changed because now it has the proxy answer
await next();
},
);Conditional proxy:
server.get(
"/proxy_example",
proxy({
url: "https://my-url-example.com/proxy_ex3",
condition: (ctx) => {
if (ctx.url.searchParams.get("foo")) {
return true;
} else {
return false;
}
},
}),
async (ctx, next) => {
console.log(ctx.extra.proxied); //will be true if proxy condition is true
console.log(ctx.req); //req has changed as it now points to the proxy
console.log(ctx.res); //res has changed because now it has the proxy answer
await next();
},
);OPTIONS (with default values):
proxy(url: string, replaceReqAndRes: true, replaceProxyPath: true, condition: : (ctx: Context) => true )
Do not use "res body parsers" with 'replaceReqAndRes: true' (default) !!!
If you don't use Request body information before the proxy or in your condition, don't use "req body parsers" as this will increase the processing cost !!!
This middleware automatically organizes uploads to avoid file system problems and create dirs if not exists, perform validations and optimizes ram usage when uploading large files using Deno standard libraries!
Ex:
.post("/upload", upload(), async (ctx: any, next: any) => { ...Ex (with custom options):
.post("/upload", upload({ path: 'uploads_custom_dir' , extensions: ['jpg', 'png'], maxSizeBytes: 20000000, maxFileSizeBytes: 10000000, saveFile: true, readFile: false, useCurrentDir: true }), async (ctx: any, next: any) => { ...Request must contains a body with form type "multipart/form-data", and inputs with type="file".
Ex (pre validation):
.post("/pre_upload", preUploadValidate(["jpg", "png"], 20000000, 10000000), async (ctx: any, next: any) => { ...Pre validation options:
preUploadValidate(
extensions: Array<string> = [],
maxSizeBytes: number = Number.MAX_SAFE_INTEGER,
maxFileSizeBytes: number = Number.MAX_SAFE_INTEGER,
)
Below an frontend example to work with AJAX, also accepting type="file" multiple:
var files = document.querySelector("#yourFormId input[type=file]").files;
var name = document.querySelector("#yourFormId input[type=file]").getAttribute(
"name",
);
var form = new FormData();
for (var i = 0; i < files.length; i++) {
form.append(`${name}_${i}`, files[i]);
}
var res = await fetch("/upload", { //Fetch API automatically puts the form in the format "multipart/form-data".
method: "POST",
body: form,
}).then((response) => response.json());
console.log(res);
//VALIDATIONS --------------
var validationData = {};
for (var i = 0; i < files.length; i++) {
var newObj = { //newObj is needed, JSON.stringify(files[i]) not work
"name": files[i].name,
"size": files[i].size,
};
validationData[`${name}_${i}`] = newObj;
}
var validations = await fetch("/pre_upload", {
method: "POST",
headers: { "Content-Type": "application/json" },
body: JSON.stringify(validationData),
}).then((response) => response.json());
console.log(validations);In Deno (backend):
import {
preUploadValidate,
res,
Server,
upload,
} from "https://deno.land/x/faster/mod.ts";
const server = new Server();
server.post(
"/upload",
res("json"),
upload({
path: "my_uploads",
extensions: ["jpg", "png"],
maxSizeBytes: 20000000,
maxFileSizeBytes: 10000000,
}),
async (ctx: any, next: any) => {
ctx.res.body = ctx.extra.uploadedFiles;
await next();
},
);
server.post(
"/pre_upload",
res("json"),
preUploadValidate(["jpg", "png"], 20000000, 10000000),
async (ctx: any, next: any) => {
ctx.res.body = { msg: "Passed upload validations." };
await next();
},
);
server.get("/", res("html"), async (ctx: any, next: any) => {
ctx.res.body = `
<form id="yourFormId" enctype="multipart/form-data" action="/upload" method="post">
<input type="file" name="file1" multiple><br>
<input type="submit" value="Submit">
</form>
`;
await next();
});
await server.listen({ port: 80 });import {
Context,
ContextResponse, //type
Cookie, //type, alias to deno std
deleteCookie, //alias to deno std
getCookies, //alias to deno std
logger,
NextFunc, //type
Params, //type
parse,
preUploadValidate,
ProcessorFunc, //type
proxy,
rateLimit,
redirect,
req,
res,
Route, //type
RouteFn, //type
Server,
serveStatic,
Session, //type
session,
SessionStorageEngine,
setCookie, //alias to deno std
setCORS,
SQLiteStorageEngine,
Token,
upload,
} from "https://deno.land/x/faster/mod.ts";Example of depoly application "my-deno-app" in ubuntu environment. Change the "my-deno-app" and the directories to yours.
Create run script ("run-server.sh") in your application folder with the content:
#!/bin/bash
/home/ubuntu/.deno/bin/deno run --allow-net --allow-read --allow-write /home/ubuntu/my-deno-app/app.ts
Give permission to the script:
chmod +x run-server.shCreate service files:
sudo touch /etc/systemd/system/my-deno-app.service
sudo nano /etc/systemd/system/my-deno-app.serviceIn "my-deno-app".service (change the "Description", "WorkingDirectory" and "ExecStart" to yours):
[Unit]
Description=My Deno App
[Service]
WorkingDirectory=/home/ubuntu/my-deno-app
ExecStart=/home/ubuntu/my-deno-app/run-server.sh
TimeoutSec=30
Restart=always
RestartSec=1
[Install]
WantedBy=multi-user.target
If your application needs to wait for another service to start, such as the mongodb database, you can use the ´[Unit]´ section like this:
[Unit]
Description=My Deno App
After=mongod.service
Enable the "my-deno-app" service:
sudo systemctl enable my-deno-app.serviceTo start and stop the "my-deno-app" service:
sudo service my-deno-app stop
sudo service my-deno-app startSee log:
journalctl -u my-deno-app.service --since=today -eInstall certbot:
sudo apt install certbotGenerate certificates:
sudo certbot certonly --manualIn your application, to verify the domain you will need something like:
import { Server, serveStatic } from "https://deno.land/x/faster/mod.ts";
const server = new Server();
server.get( //verify http://<YOUR_DOMAIN>/.well-known/acme-challenge/<TOKEN>
"/.well-known/*",
serveStatic("./.well-known"), // ex: create .well-known folder in yor app folder
);
await server.listen({ port: 80 });To run your application on https (Change "yourdomain.link" to your domain):
await server.listen({
port: 443,
certFile: "/etc/letsencrypt/live/yourdomain.link/fullchain.pem",
keyFile: "/etc/letsencrypt/live/yourdomain.link/privkey.pem",
});The certificate is valid for a short period. Set crontab to update automatically. The command 'sudo crontab' opens roots crontab, all commands are executed as sudo. Do like this:
sudo crontab -eAdd to the end of the file (to check and renew if necessary every 12 hours):
0 */12 * * * certbot -q renew --standalone --preferred-challenges=http
Or also to check every 7 days:
0 0 * * 0 certbot -q renew --standalone --preferred-challenges=http
Author: Henrique Emanoel Viana, a Brazilian computer scientist, enthusiast of web technologies, cel: +55 (41) 99999-4664. URL: https://sites.google.com/site/henriqueemanoelviana
Improvements and suggestions are welcome!
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