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|
package main
import (
"encoding/json"
"flag"
"fmt"
"io/ioutil"
"net"
"net/http"
"os"
"github.com/rs/cors"
"within.website/x/cmd/hlang/run"
)
var (
maxBytes = flag.Int64("max-playground-bytes", 75, "how many bytes of data should users be allowed to post to the playground?")
)
func doHTTP() error {
http.Handle("/", doTemplate(indexTemplate))
http.Handle("/docs", doTemplate(docsTemplate))
http.Handle("/faq", doTemplate(faqTemplate))
http.Handle("/play", doTemplate(playgroundTemplate))
http.HandleFunc("/api/playground", runPlayground)
srv := &http.Server{
Addr: ":" + *port,
Handler: cors.Default().Handler(http.DefaultServeMux),
}
if *sockpath != "" {
os.RemoveAll(*sockpath)
l, err := net.Listen("unix", *sockpath)
if err != nil {
return fmt.Errorf("can't listen on %s: %v", *sockpath, err)
}
defer l.Close()
return srv.Serve(l)
} else {
return srv.ListenAndServe()
}
}
func httpError(w http.ResponseWriter, err error, code int) {
w.Header().Set("Content-Type", "application/json")
w.WriteHeader(code)
json.NewEncoder(w).Encode(struct {
Error string `json:"err"`
}{
Error: err.Error(),
})
}
func runPlayground(w http.ResponseWriter, r *http.Request) {
if r.Method != http.MethodPost {
http.NotFound(w, r)
return
}
rc := http.MaxBytesReader(w, r.Body, *maxBytes)
defer rc.Close()
data, err := ioutil.ReadAll(rc)
if err != nil {
httpError(w, err, http.StatusBadGateway)
return
}
comp, err := compile(string(data))
if err != nil {
httpError(w, fmt.Errorf("compliation error: %v", err), http.StatusBadRequest)
return
}
er, err := run.Run(comp.Binary)
if err != nil {
httpError(w, fmt.Errorf("runtime error: %v", err), http.StatusInternalServerError)
return
}
w.Header().Set("Content-Type", "application/json")
json.NewEncoder(w).Encode(struct {
Program *CompiledProgram `json:"prog"`
Results *run.ExecResult `json:"res"`
}{
Program: comp,
Results: er,
})
}
func doTemplate(body string) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
w.Header().Set("Content-Type", "text/html")
fmt.Fprintln(w, body)
})
}
const indexTemplate = `<html>
<head>
<title>The h Programming Language</title>
<link rel="stylesheet" href="https://within.website/static/gruvbox.css">
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
</head>
<body>
<main>
<nav>
<a href="/">The h Programming Language</a> -
<a href="/docs">Docs</a> -
<a href="/play">Playground</a> -
<a href="/faq">FAQ</a>
</nav>
<h1>The h Programming Language</h1>
<p><big>A simple, fast, open-source, complete and safe language for developing modern software for the web</big></p>
<hr />
<h2>Example Program</h2>
<code><pre>h</pre></code>
<p>Outputs:</p>
<code><pre>h</pre></code>
<hr />
<h2>Fast Compilation</h2>
<p>h compiles hundreds of characters of source per second. I didn't really test how fast it is, but when I was testing it the speed was fast enough that I didn't care to profile it.</p>
<hr />
<h2>Safety</h2>
<p>h is completely memory safe with no garbage collector or heap allocations. It does not allow memory leaks to happen, nor do any programs in h have the possibility to allocate memory.</p>
<ul>
<li>No null</li>
<li>Completely deterministic behavior</li>
<li>No mutable state</li>
<li>No persistence</li>
<li>All functions are pure functions</li>
<li>No sandboxing required</li>
</ul>
<hr />
<h2>Zero* Dependencies</h2>
<p>h generates <a href="http://webassembly.org">WebAssembly</a>, so every binary produced by the compiler is completely dependency free save a single system call: <code>h.h</code>. This allows for modern, future-proof code that will work on all platforms.</p>
<hr />
<h2>Simple</h2>
<p>h has a <a href="https://tulpa.dev/cadey/hlang/src/branch/master/h/h.peg">simple grammar</a> that gzips to 117 bytes. Creating a runtime environment for h is so trivial just about anyone can do it.</p>
<hr />
<h2>Platform Support</h2>
<p>h supports the following platforms:</p>
<ul>
<li>Google Chrome</li>
<li>Electron</li>
<li>Chromium Embedded Framework</li>
<li>Microsoft Edge</li>
<li>Olin</li>
</ul>
<hr />
<h2>International Out of the Box</h2>
<p>h supports multiple written and spoken languages with true contextual awareness. It not only supports the Latin <code>h</code> as input, it also accepts the <a href="http://lojban.org">Lojbanic</a> <code>'</code> as well. This allows for full 100% internationalization into Lojban should your project needs require it.</p>
<hr />
<h2>Testimonials</h2>
<p>Not convinced? Take the word of people we probably didn't pay for their opinion.</p>
<ul>
<li>I don't see the point of this.</li>
<li>This solves all my problems. All of them. Just not in the way I expected it to.</li>
<li>Yes.</li>
<li>Perfect.</li>
<li>h is the backbone of my startup.</li>
</ul>
<hr />
<h2>Open-Source</h2>
<p>The h compiler and default runtime are <a href="https://tulpa.dev/cadey/hlang">open-source</a> free software sent out into the <a href="https://creativecommons.org/choose/zero/">Public Domain</a>. You can use h for any purpose at all with no limitations or restrictions.</p>
<hr />
<footer>
<center><p><i>From <a href="https://xeiaso.net">Within</a></i></p></center>
</footer>
</main>
</body>
</html>`
const docsTemplate = `<html>
<head>
<title>The h Programming Language - Docs</title>
<link rel="stylesheet" href="https://within.website/static/gruvbox.css">
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
</head>
<body>
<main>
<nav>
<a href="/">The h Programming Language</a> -
<a href="/docs">Docs</a> -
<a href="/play">Playground</a> -
<a href="/faq">FAQ</a>
</nav>
<h1>Documentation</h1>
<p><big id="comingsoon">Coming soon...</big></p>
<script>
Date.prototype.addDays = function(days) {
var date = new Date(this.valueOf());
date.setDate(date.getDate() + days);
return date;
}
let date = new Date();
date = date.addDays(1);
document.getElementById("comingsoon").innerHTML = "Coming " + date.toDateString();
</script>
<hr />
<footer>
<center><p><i>From <a href="https://xeiaso.net">Within</a></i></p></center>
</footer>
</main>
</body>
</html>`
const faqTemplate = `<html>
<head>
<title>The h Programming Language - FAQ</title>
<link rel="stylesheet" href="https://within.website/static/gruvbox.css">
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
</head>
<body>
<main>
<nav>
<a href="/">The h Programming Language</a> -
<a href="/docs">Docs</a> -
<a href="/play">Playground</a> -
<a href="/faq">FAQ</a>
</nav>
<h1>Frequently Asked Questions</h1>
<h2>What are the instructions of h?</h2>
<p>h supports the following instructions:</p>
<ul>
<li><code>h</code></li>
<li><code>'</code></li>
</ul>
<p>All valid h instructions must be separated by a space (<code>\0x20</code> or the spacebar on your computer). No other forms of whitespace are permitted. Any other characters will render your program <a href="http://jbovlaste.lojban.org/dict/gentoldra">gentoldra</a>.</p>
<h2>How do I install and use h?</h2>
<p>With any computer running <a href="https://golang.org">Go</a> 1.11 or higher:</p>
<code><pre>go get -u -v within.website/x/cmd/hlang</pre></code>
Usage is simple:
<code><pre>Usage of h:
-config string
configuration file, if set (see flagconfyg(4))
-koan
if true, print the h koan and then exit
-license
show software licenses?
-manpage
generate a manpage template?
-max-playground-bytes int
how many bytes of data should users be allowed to
post to the playground? (default 75)
-o string
if specified, write the webassembly binary created
by -p here
-p string
h program to compile/run
-port string
HTTP port to listen on
-v if true, print the version of h and then exit</pre></code>
<h2>What version is h?</h2>
<p>Version 1.0.1, this will hopefully be the only release.</p>
<h2>What is the h koan?</h2>
<p>And Jesus said unto the theologians, "Who do you say that I am?"</p>
<p>They replied: "You are the eschatological manifestation of the ground of our being, the kerygma of which we find the ultimate meaning in our interpersonal relationships."</p>
<p>And Jesus said "...What?"</p>
<p>Some time passed and one of them spoke "h".</p>
<p>Jesus was enlightened.</p>
<h2>Why?</h2>
<p>That's a good question. The following blogposts may help you understand this more:</p>
<ul>
<li><a href="https://xeiaso.net/blog/the-origin-of-h-2015-12-14">The Origin of h</a></li>
<li><a href="https://xeiaso.net/blog/formal-grammar-of-h-2019-05-19">A Formal Grammar of h</a></li>
</ul>
<h2>Who wrote h?</h2>
<p><a href="https://xeiaso.net">Within</a></p>
<hr />
<footer>
<center><p><i>From <a href="https://xeiaso.net">Within</a></i></p></center>
</footer>
</main>
</body>
</html>`
const playgroundTemplate = `<html>
<head>
<title>The h Programming Language - Playground</title>
<link rel="stylesheet" href="https://within.website/static/gruvbox.css">
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
</head>
<body>
<main>
<nav>
<a href="/">The h Programming Language</a> -
<a href="/docs">Docs</a> -
<a href="/play">Playground</a> -
<a href="/faq">FAQ</a>
</nav>
<h1>Playground</h1>
<p><small>Unfortunately, Javascript is required to use this page, sorry.</small></p>
<h2>Program</h2>
<input id="program" type="text" value="h" />
<input onClick="runProgram()" type="button" value="Run">
<p id="status"></p>
<h3>Output</h3>
<code><pre id="output"></pre></code>
<h4>AST</h4>
<code><pre id="ast_box"></pre></code>
<p>Gas used: <span id="gas_used"></span></p>
<p>Execution time (nanoseconds): <span id="exec_time"></span></p>
<script>
function runProgram() {
const programData = document.getElementById("program").value;
const output = document.getElementById("output");
const astBox = document.getElementById("ast_box");
const execTime = document.getElementById("exec_time");
const status = document.getElementById("status");
status.innerHTML = "submitting to the server...";
postData("/api/playground", programData)
.then(function(data) {
if (data.err != null) {
status.innerHTML = data.err;
return;
}
status.innerHTML = "success";
astBox.innerHTML = data.prog.ast;
output.innerHTML = data.res.out;
execTime.innerHTML = data.res.exec_duration;
})
.catch(function(error) {
console.log(error);
status.innerHTML = error + ". Please try again later?";
});
}
function postData(url = "", data = "h") {
return fetch(url, {
method: "POST",
mode: "cors",
cache: "no-cache",
headers: {
"Content-Type": "text/plain",
},
referrer: "no-referrer",
body: data,
}).then(response => response.json());
}
</script>
<hr />
<footer>
<center><p><i>From <a href="https://xeiaso.net">Within</a></i></p></center>
</footer>
</main>
</body>
</html>`
|
