MicroPython-WebMain/WebFileManager.html at main · Metabolix/MicroPython-WebMain · GitHub

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<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>WebFileManager</title>
<style>
#ui {
    display: flex;
}
#filename {
    width: 25em;
}
ul {
    list-style: none;
    padding: 0;
}
#filetree {
    min-width: 16em;
}
#results {
    width: 16em;
}
#filetree li {
    margin-bottom: 0.5em;
}
#filetree li ul {
    margin-top: 0.5em;
    margin-left: 1em;
}
#results li {
    margin-bottom: 1em;
    max-height: 5em;
    opacity: 1;
    white-space: pre-line;
    overflow: hidden;
    transition: all .5s ease-out;
}
#results li.result-hidden {
    margin-bottom: 0;
    max-height: 0;
    opacity: 0;
}
</style>
</head>
<body>
<h1>WebFileManager</h1>
<p><button onclick="do_reset();">reset machine</button></p>
<div id="ui">
    <fieldset>
        <legend>Manage files</legend>
        <p><button id="refresh" onclick="do_filetree();">refresh list</button></p>
        <p><button id="mkdir" onclick="do_mkdir();">mkdir</button> <input id="mkdir-name"></p>
        <p><button id="rmdir" onclick="do_rmdir();">rmdir</button> <input id="rmdir-name"></p>
        <ul id="filetree"></ul>
    </fieldset>
    <fieldset>
        <legend>Edit file: <span id="filename-open">-</span></legend>
        <p>
        Filename: <input id="filename">
        <button id="read" onclick="do_read();">(Re)Open</button>
        <button id="write" onclick="do_write();">Save</button>
        <button id="unlink" onclick="do_unlink();">Delete</button>
        <button id="allow-edit" onclick="do_allow_edit();">Edit as text</button>
        </p>
        <p><textarea id="data" rows="20" cols="100"></textarea></p>
        <p><a id="download-link" href="#">Save to Computer</a></p>
        <p>Open from Computer: <input type="file" id="upload"></p>
    </fieldset>
    <fieldset>
        <legend>Results</legend>
        <ul id="results"></ul>
    </fieldset>
</div>

<script>
const $ = id => document.getElementById(id);
const $_ = tag => document.createElement(tag);
const show_result = msg => {
    let e = $("results").insertBefore($_("li"), $("results").firstChild);
    e.textContent = new Date().toLocaleString() + "\n" + msg;
    e.classList.add("result-hidden");
    setTimeout(() => e.classList.remove("result-hidden"), 100);
    setTimeout(() => e.classList.add("result-hidden"), 60_000);
    setTimeout(() => e.remove(), 62_000);
};
const fetch_ok = async (uri, params) => {
    let result = await fetch(uri, params);
    if (!result.ok) {
        show_result("HTTP error " + result.status);
        throw result.status;
    }
    return result;
};

const do_reset = async () => {
    fetch("?reset", {method: "POST"})
    .then(() => show_result("Reset initiated"))
    .catch(() => show_result("Failed to reset"))
};

const filetree = async function () {
    const ls = async name => (await fetch_ok("?ls=" + name)).json();
    let t = (await ls("/")).map(x => "/" + x);
    for (let i = 0; i < t.length; ++i) {
        if (t[i].substr(-1) == "/") {
            let tt = await ls(t[i]);
            if (tt) {
                t.splice(i + 1, 0, ...tt.map(x => t[i] + x));
            }
        }
    }
    return t;
};

const do_filetree = async () => {
    let files = await filetree();
    let ul = {"/": $("filetree")};
    ul["/"].innerHTML = "";
    files.map(f => {
        let dir = f.replace(/(.*\/).+/, "$1");
        let li = ul[dir].appendChild($_("li"));
        let a = li.appendChild($_("a"));
        a.textContent = f.substr(dir.length);
        if (f.substr(-1) == "/") {
            a.href = "?ls=" + f;
            a.addEventListener("click", e => {
                e.preventDefault();
                $("mkdir-name").value = f;
                $("rmdir-name").value = f;
            });
            ul[f] = li.appendChild($_("ul"));
        } else {
            a.href = "?read=" + f;
            a.addEventListener("click", e => {
                e.preventDefault();
                $("filename").value = f;
                do_read();
            });
        }
    });
};
const do_mkdir = async () => {
    let dir = $("mkdir-name").value.replace(/\/+$/, "");
    fetch_ok("?mkdir=" + dir, {method: "POST"})
    .then(() => show_result("Created dir " + dir))
    .catch(e => show_result("Failed to create dir " + dir))
    .finally(do_filetree);
};
const do_rmdir = async () => {
    let dir = $("rmdir-name").value.replace(/\/+$/, "");
    fetch_ok("?rmdir=" + dir, {method: "POST"})
    .then(() => show_result("Removed dir " + dir))
    .catch(e => show_result("Failed to remove dir " + dir))
    .finally(do_filetree);
};
const do_read = async () => {
    let name = $("filename").value;
    fetch_ok("?read=" + name)
    .then(async e => done_read(name, await e.blob()))
    .catch(e => show_result("Failed to open " + name))
};
let binary_data;
const done_read = async (name, blob) => {
    let buffer = await blob.arrayBuffer();
    binary_data = new Uint8Array(buffer);
    $("download-link").href = "#" + name;
    try {
        $("data").disabled = false;
        $("data").value = await blob.text();
        new TextDecoder('utf-8', { fatal: true }).decode(buffer);
    } catch (e) {
        $("data").disabled = true;
    }
    $("allow-edit").disabled = !$("data").disabled;
    $("filename").value = $("filename-open").textContent = name;
    show_result("Opened " + name);
};
const do_download = () => {
    $("download-link").click();
};
const do_allow_edit = () => {
    $("data").disabled = false;
    $("allow-edit").disabled = !$("data").disabled;
};
const do_write = async () => {
    let name = $("filename").value;
    const params = {
        method: "POST",
        headers: {"Content-Type": "application/octet-stream"},
        body: $("data").disabled ? binary_data : $("data").value
    };
    fetch("?write=" + name, params)
    .then(() => {
        show_result("Wrote file " + name);
        $("filename-open").textContent = name;
    })
    .catch(e => show_result("Failed to write file " + name))
    .finally(do_filetree);
};
const do_unlink = async () => {
    let name = $("filename").value;
    fetch_ok("?unlink=" + name, {method: "POST"})
    .then(() => show_result("Removed file " + name))
    .catch(e => show_result("Failed to remove file " + name))
    .finally(do_filetree);
};
window.addEventListener("unload", () => {});
window.addEventListener("load", () => {
    $("filename").value = "";
    $("data").value = "";
    $("upload").addEventListener("change", function() {
        for (const f of this.files) {
            done_read(f.name, f);
        }
    });
    $("download-link").addEventListener("click", function() {
        $("download-link").download = $("filename").value.replace(/.*\/(?=.)/, "") || "file.dat";
        if ($("data").disabled) {
            this.href = "data:application/octet-stream;base64," + btoa(String.fromCharCode(...binary_data));
        } else {
            this.href = "data:text/plain;charset=UTF-8," + encodeURIComponent($("data").value);
        }
    });
    do_filetree();
});
</script>
</body>
</html>