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chdb

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root commited on Jun 26, 2023

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5b065c1

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1 Parent(s): 68e997e

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Files changed (3) hide show

main.py +33 -0
public/play.html +1079 -0
requirements.txt +2 -0

main.py ADDED Viewed

	@@ -0,0 +1,33 @@

+from flask import Flask, request
+import chdb
+import os
+app = Flask(__name__, static_folder="public", static_url_path="")
+@app.route('/', methods=["GET"])
+def clickhouse():
+    query = request.args.get('query', default="", type=str)
+    format = request.args.get('default_format', default="CSV", type=str)
+    if not query:
+        return app.send_static_file('play.html')
+    res = chdb.query(query, format)
+    return res.get_memview().tobytes()
+@app.route('/', methods=["POST"])
+def play():
+    query = request.data
+    format = request.args.get('default_format', default="CSV", type=str)
+    if not query:
+        return app.send_static_file('play.html')
+    res = chdb.query(query, format)
+    return res.get_memview().tobytes()
+@app.errorhandler(404)
+def handle_404(e):
+    return app.send_static_file('play.html')
+host = os.getenv('HOST', '0.0.0.0')
+port = os.getenv('PORT', 7860)
+app.run(host=host, port=port)

public/play.html ADDED Viewed

	@@ -0,0 +1,1079 @@

+<!DOCTYPE html>
+<html>
+<head>
+    <meta charset="UTF-8">
+    <link rel="icon" href="data:image/png;base64,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">
+    <title>chDB</title>
+    <!-- Code Style:
+    Do not use any JavaScript or CSS frameworks or preprocessors.
+    This HTML page should not require any build systems (node.js, npm, gulp, etc.)
+    This HTML page should not be minified, instead it should be reasonably minimalistic by itself.
+    This HTML page should not load any external resources on load.
+    (CSS and JavaScript must be embedded directly to the page. No external fonts or images should be loaded).
+    This UI should look as lightweight, clean and fast as possible.
+    All UI elements must be aligned in pixel-perfect way.
+    There should not be any animations.
+    No unexpected changes in positions of elements while the page is loading.
+    Navigation by keyboard should work.
+    64-bit numbers must display correctly.
+    -->
+    <!-- Development Roadmap:
+    1. Support readonly servers.
+    Check if readonly = 1 (with SELECT FROM system.settings) to avoid sending settings. It can be done once on address/credentials change.
+    It can be done in background, e.g. wait 100 ms after address/credentials change and do the check.
+    Also it can provide visual indication that credentials are correct.
+    -->
+    <style>
+        :root {
+            --background-color: #DDF8FF; /* Or #FFFBEF; actually many pastel colors look great for light theme. */
+            --element-background-color: #FFF;
+            --bar-color: #F8F4F0; /* Light bar in background of table cells. */
+            --border-color: #EEE;
+            --shadow-color: rgba(0, 0, 0, 0.1);
+            --button-color: #FFAA00; /* Orange on light-cyan is especially good. */
+            --text-color: #000;
+            --button-active-color: #F00;
+            --button-active-text-color: #FFF;
+            --misc-text-color: #888;
+            --error-color: #FEE; /* Light-pink on light-cyan is so neat, I even want to trigger errors to see this cool combination of colors. */
+            --table-header-color: #F8F8F8;
+            --table-hover-color: #FFF8EF;
+            --null-color: #A88;
+            --link-color: #06D;
+            --logo-color: #CEE;
+            --logo-color-active: #BDD;
+        }
+        [data-theme="dark"] {
+            --background-color: #000;
+            --element-background-color: #102030;
+            --bar-color: #182838;
+            --border-color: #111;
+            --shadow-color: rgba(255, 255, 255, 0.1);
+            --text-color: #CCC;
+            --button-color: #FFAA00;
+            --button-text-color: #000;
+            --button-active-color: #F00;
+            --button-active-text-color: #FFF;
+            --misc-text-color: #888;
+            --error-color: #400;
+            --table-header-color: #102020;
+            --table-hover-color: #003333;
+            --null-color: #A88;
+            --link-color: #4BDAF7;
+            --logo-color: #222;
+            --logo-color-active: #333;
+        }
+        *
+        {
+            box-sizing: border-box;
+            /* For iPad */
+            margin: 0;
+            border-radius: 0;
+            tab-size: 4;
+        }
+        html, body
+        {
+            height: 100%;
+            margin: 0;
+            /* This enables position: sticky on controls */
+            overflow: auto;
+        }
+        html
+        {
+            /* The fonts that have full support for hinting. */
+            font-family: Liberation Sans, DejaVu Sans, sans-serif, Noto Color Emoji, Apple Color Emoji, Segoe UI Emoji;
+            background: var(--background-color);
+            color: var(--text-color);
+        }
+        body
+        {
+            /* This element will show scroll-bar on overflow, and the scroll-bar will be outside of the padding. */
+            padding: 0.5rem;
+        }
+        #controls
+        {
+            /* When a page will be scrolled horizontally due to large table size, keep controls in place. */
+            position: sticky;
+            left: 0;
+        }
+        /* Otherwise Webkit based browsers will display ugly border on focus. */
+        textarea, input, button
+        {
+            outline: none;
+            border: none;
+            color: var(--text-color);
+        }
+        .monospace
+        {
+            /* Prefer fonts that have full hinting info. This is important for non-retina displays.
+               Also I personally dislike "Ubuntu" font due to the similarity of 'r' and 'г' (it looks very ignorant). */
+            font-family: Liberation Mono, DejaVu Sans Mono, MonoLisa, Consolas, monospace;
+        }
+        .monospace-table
+        {
+            /* Liberation is worse than DejaVu for block drawing characters. */
+            font-family: DejaVu Sans Mono, Liberation Mono, MonoLisa, Consolas, monospace;
+        }
+        .shadow
+        {
+            box-shadow: 0 0 1rem var(--shadow-color);
+        }
+        input, textarea
+        {
+            border: 1px solid var(--border-color);
+            /* The font must be not too small (to be inclusive) and not too large (it's less practical and make general feel of insecurity) */
+            font-size: 11pt;
+            padding: 0.25rem;
+            background-color: var(--element-background-color);
+        }
+        #query
+        {
+            /* Make enough space for even big queries. */
+            height: 20vh;
+            /* Keeps query text-area's width full screen even when user adjusting the width of the query box. */
+            min-width: 100%;
+        }
+        #inputs
+        {
+            white-space: nowrap;
+        }
+        #url
+        {
+            width: 70%;
+        }
+        #user
+        {
+            width: 15%;
+        }
+        #password
+        {
+            width: 15%;
+        }
+        #run_div
+        {
+            margin-top: 1rem;
+        }
+        #run
+        {
+            color: var(--button-text-color);
+            background-color: var(--button-color);
+            padding: 0.25rem 1rem;
+            cursor: pointer;
+            font-weight: bold;
+            font-size: 100%; /* Otherwise button element will have lower font size. */
+        }
+        #run:hover, #run:focus
+        {
+            color: var(--button-active-text-color);
+            background-color: var(--button-active-color);
+        }
+        #stats
+        {
+            float: right;
+            color: var(--misc-text-color);
+        }
+        #toggle-light, #toggle-dark
+        {
+            float: right;
+            padding-right: 0.5rem;
+            cursor: pointer;
+        }
+        .hint
+        {
+            color: var(--misc-text-color);
+        }
+        #data_div
+        {
+            margin-top: 1rem;
+        }
+        #data-table
+        {
+            width: 100%;
+            border-collapse: collapse;
+            border-spacing: 0;
+        }
+        /* Will be displayed when user specified custom format. */
+        #data-unparsed
+        {
+            background-color: var(--element-background-color);
+            margin-top: 0rem;
+            padding: 0.25rem 0.5rem;
+            display: none;
+        }
+        td
+        {
+            background-color: var(--element-background-color);
+            /* For wide tables any individual column will be no more than 50% of page width. */
+            max-width: 50vw;
+            /* The content is cut unless you hover. */
+            overflow: hidden;
+            text-overflow: ellipsis;
+            padding: 0.25rem 0.5rem;
+            border: 1px solid var(--border-color);
+            white-space: pre;
+            vertical-align: top;
+        }
+        .right
+        {
+            text-align: right;
+        }
+        th
+        {
+            padding: 0.25rem 0.5rem;
+            text-align: center;
+            background-color: var(--table-header-color);
+            border: 1px solid var(--border-color);
+        }
+        /* The row under mouse pointer is highlight for better legibility. */
+        tr:hover, tr:hover td
+        {
+            background-color: var(--table-hover-color);
+        }
+        tr:hover
+        {
+            box-shadow: 0 0 1rem rgba(0, 0, 0, 0.1);
+        }
+        #error
+        {
+            background: var(--error-color);
+            white-space: pre-wrap;
+            padding: 0.5rem 1rem;
+            display: none;
+        }
+        /* When mouse pointer is over table cell, will display full text (with wrap) instead of cut.
+         * We also keep it for some time on mouseout for "hysteresis" effect.
+         */
+        td.left:hover, .td-hover-hysteresis
+        {
+            white-space: pre-wrap;
+            max-width: none;
+        }
+        .td-selected
+        {
+            white-space: pre-wrap;
+            max-width: none;
+            background-color: var(--table-hover-color);
+            border: 2px solid var(--border-color);
+        }
+        td.transposed
+        {
+            max-width: none;
+            overflow: auto;
+            white-space: pre-wrap;
+        }
+        td.empty-result
+        {
+            text-align: center;
+            vertical-align: middle;
+        }
+        .row-number
+        {
+            width: 1%;
+            text-align: right;
+            background-color: var(--table-header-color);
+            color: var(--misc-text-color);
+        }
+        div.empty-result
+        {
+            opacity: 10%;
+            font-size: 7vw;
+            font-family: Liberation Sans, DejaVu Sans, sans-serif;
+        }
+        /* The style for SQL NULL */
+        .null
+        {
+            color: var(--null-color);
+        }
+        @keyframes hourglass-animation {
+            0% {
+                transform: rotate(-180deg);
+            }
+            50% {
+                transform: rotate(-180deg);
+            }
+            100% {
+                transform: none;
+            }
+        }
+        #hourglass
+        {
+            display: none;
+            margin-left: 1rem;
+            font-size: 110%;
+            color: #888;
+            animation: hourglass-animation 1s linear infinite;
+        }
+        #check-mark
+        {
+            display: none;
+            padding-left: 1rem;
+            font-size: 110%;
+            color: #080;
+        }
+        a, a:visited
+        {
+            color: var(--link-color);
+            text-decoration: none;
+        }
+        #graph
+        {
+            display: none;
+        }
+        /* This is for graph in svg */
+        text
+        {
+            font-size: 14px;
+            fill: var(--text-color);
+        }
+        .node rect
+        {
+            fill: var(--element-background-color);
+            filter: drop-shadow(.2rem .2rem .2rem var(--shadow-color));
+        }
+        .edgePath path
+        {
+            stroke: var(--text-color);
+        }
+        marker
+        {
+            fill: var(--text-color);
+        }
+        #logo
+        {
+            fill: var(--logo-color);
+        }
+        #logo:hover
+        {
+            fill: var(--logo-color-active);
+        }
+        #logo-container
+        {
+            text-align: center;
+            margin-top: 5em;
+        }
+        #chart
+        {
+            background-color: var(--element-background-color);
+            filter: drop-shadow(.2rem .2rem .2rem var(--shadow-color));
+            display: none;
+            height: 70vh;
+        }
+        /* This is for charts (uPlot), Copyright (c) 2022 Leon Sorokin, MIT License, https://github.com/leeoniya/uPlot/ */
+        .u-wrap {position: relative;user-select: none;}
+        .u-over, .u-under, .u-axis {position: absolute;}
+        .u-under {overflow: hidden;}
+        .uplot canvas {display: block;position: relative;width: 100%;height: 100%;}
+        .u-legend {margin: auto;text-align: center; margin-top: 1em; font-family: Liberation Mono, DejaVu Sans Mono, MonoLisa, Consolas, monospace;}
+        .u-inline {display: block;}
+        .u-inline * {display: inline-block;}
+        .u-inline tr {margin-right: 16px;}
+        .u-legend th {font-weight: 600;}
+        .u-legend th > * {vertical-align: middle;display: inline-block;}
+        .u-legend td { min-width: 13em; }
+        .u-legend .u-marker {width: 1em;height: 1em;margin-right: 4px;background-clip: padding-box !important;}
+        .u-inline.u-live th::after {content: ":";vertical-align: middle;}
+        .u-inline:not(.u-live) .u-value {display: none;}
+        .u-series > * {padding: 4px;}
+        .u-series th {cursor: pointer;}
+        .u-legend .u-off > * {opacity: 0.3;}
+        .u-select {background: rgba(0,0,0,0.07);position: absolute;pointer-events: none;}
+        .u-cursor-x, .u-cursor-y {position: absolute;left: 0;top: 0;pointer-events: none;will-change: transform;z-index: 100;}
+        .u-hz .u-cursor-x, .u-vt .u-cursor-y {height: 100%;border-right: 1px dashed #607D8B;}
+        .u-hz .u-cursor-y, .u-vt .u-cursor-x {width: 100%;border-bottom: 1px dashed #607D8B;}
+        .u-cursor-pt {position: absolute;top: 0;left: 0;border-radius: 50%;border: 0 solid;pointer-events: none;will-change: transform;z-index: 100;/*this has to be !important since we set inline "background" shorthand */background-clip: padding-box !important;}
+        .u-axis.u-off, .u-select.u-off, .u-cursor-x.u-off, .u-cursor-y.u-off, .u-cursor-pt.u-off {display: none;}
+    </style>
+</head>
+<body>
+    <div id="controls">
+        <div id="inputs">
+            <input class="monospace shadow" id="url" type="text" value="http://localhost:8123/" placeholder="url" /><input class="monospace shadow" id="user" type="text" value="default" placeholder="user" /><input class="monospace shadow" id="password" type="password" placeholder="password" />
+        </div>
+        <div id="query_div">
+            <textarea autofocus spellcheck="false" class="monospace shadow" id="query"></textarea>
+        </div>
+        <div id="run_div">
+            <button class="shadow" id="run">Run</button>
+            <span class="hint">&nbsp;(Ctrl/Cmd+Enter)</span>
+            <span id="hourglass">⧗</span>
+            <span id="check-mark">✔</span>
+            <span id="stats"></span>
+            <span id="toggle-dark">🌑</span><span id="toggle-light">🌞</span>
+        </div>
+    </div>
+    <div id="data_div">
+        <table class="monospace-table shadow" id="data-table"></table>
+        <pre class="monospace-table shadow" id="data-unparsed"></pre>
+    </div>
+    <div id="chart"></div>
+    <svg id="graph" fill="none"></svg>
+    <p id="error" class="monospace shadow">
+    </p>
+    <p id="logo-container"></p>
+</body>
+<script type="text/javascript">
+    /// Incremental request number. When response is received,
+    /// if its request number does not equal to the current request number, response will be ignored.
+    /// This is to avoid race conditions.
+    let request_num = 0;
+    /// Save query in history only if it is different.
+    let previous_query = '';
+    const current_url = new URL(window.location);
+    const server_address = current_url.searchParams.get('url');
+    if (server_address) {
+        document.getElementById('url').value = server_address;
+    } else if (location.protocol != 'file:') {
+        /// Substitute the address of the server where the page is served.
+        document.getElementById('url').value = location.origin;
+    }
+    /// Substitute user name if it's specified in the query string
+    const user_from_url = current_url.searchParams.get('user');
+    if (user_from_url) {
+        document.getElementById('user').value = user_from_url;
+    }
+    function postImpl(posted_request_num, query)
+    {
+        const user = document.getElementById('user').value;
+        const password = document.getElementById('password').value;
+        const server_address = document.getElementById('url').value;
+        var url = server_address +
+            (server_address.indexOf('?') >= 0 ? '&' : '?') +
+            /// Ask server to allow cross-domain requests.
+            'add_http_cors_header=1' +
+            '&default_format=JSONCompact' +
+            /// Safety settings to prevent results that browser cannot display.
+            '&max_result_rows=1000&max_result_bytes=10000000&result_overflow_mode=break';
+        // If play.html is opened locally, append username and password to the URL parameter to avoid CORS issue.
+        if (document.location.href.startsWith("file://")) {
+            url += '&user=' + encodeURIComponent(user) +
+            '&password=' + encodeURIComponent(password)
+        }
+        const xhr = new XMLHttpRequest;
+        xhr.open('POST', url, true);
+        // If play.html is open normally, use Basic auth to prevent username and password being exposed in URL parameters
+        if (!document.location.href.startsWith("file://")) {
+            xhr.setRequestHeader("Authorization", "Basic " + btoa(user+":"+password));
+        }
+        xhr.onreadystatechange = function()
+        {
+            if (posted_request_num != request_num) {
+                return;
+            } else if (this.readyState === XMLHttpRequest.DONE) {
+                renderResponse(this.status, this.response);
+                /// The query is saved in browser history (in state JSON object)
+                /// as well as in URL fragment identifier.
+                if (query != previous_query) {
+                    const state = {
+                        query: query,
+                        status: this.status,
+                        response: this.response.length > 100000 ? null : this.response  /// Lower than the browser's limit.
+                    };
+                    const title = "Query: " + query;
+                    let history_url = window.location.pathname + '?user=' + encodeURIComponent(user);
+                    if (server_address != location.origin) {
+                        /// Save server's address in URL if it's not identical to the address of the play UI.
+                        history_url += '&url=' + encodeURIComponent(server_address);
+                    }
+                    history_url += '#' + window.btoa(query);
+                    if (previous_query == '') {
+                        history.replaceState(state, title, history_url);
+                    } else {
+                        history.pushState(state, title, history_url);
+                    }
+                    document.title = title;
+                    previous_query = query;
+                }
+            } else {
+                //console.log(this);
+            }
+        }
+        document.getElementById('check-mark').style.display = 'none';
+        document.getElementById('hourglass').style.display = 'inline-block';
+        xhr.send(query);
+    }
+    function renderResponse(status, response) {
+        document.getElementById('hourglass').style.display = 'none';
+        if (status === 200) {
+            let json;
+            try { json = JSON.parse(response); } catch (e) {}
+            if (json !== undefined && json.statistics !== undefined) {
+                renderResult(json);
+            } else if (Array.isArray(json) && json.length == 2 &&
+                Array.isArray(json[0]) && Array.isArray(json[1]) && json[0].length > 1 && json[0].length == json[1].length) {
+                /// If user requested FORMAT JSONCompactColumns, we will render it as a chart.
+                renderChart(json);
+            } else {
+                renderUnparsedResult(response);
+            }
+            document.getElementById('check-mark').style.display = 'inline';
+        } else {
+            /// TODO: Proper rendering of network errors.
+            renderError(response);
+        }
+    }
+    let query_area = document.getElementById('query');
+    window.onpopstate = function(event) {
+        if (!event.state) {
+            return;
+        }
+        query_area.value = event.state.query;
+        if (!event.state.response) {
+            clear();
+            return;
+        }
+        renderResponse(event.state.status, event.state.response);
+    };
+    if (window.location.hash) {
+        query_area.value = window.atob(window.location.hash.substr(1));
+    }
+    function post()
+    {
+        ++request_num;
+        let query = query_area.value;
+        postImpl(request_num, query);
+    }
+    document.getElementById('run').onclick = function()
+    {
+        post();
+    }
+    document.onkeydown = function(event)
+    {
+        /// Firefox has code 13 for Enter and Chromium has code 10.
+        if ((event.metaKey || event.ctrlKey) && (event.keyCode == 13 || event.keyCode == 10)) {
+            post();
+        }
+    }
+    /// Pressing Tab in textarea will increase indentation.
+    /// But for accessibility reasons, we will fall back to tab navigation if the user already used Tab for that.
+    let user_prefers_tab_navigation = false;
+    [...document.querySelectorAll('input')].map(elem => {
+        elem.onkeydown = (e) => {
+            if (e.key == 'Tab') { user_prefers_tab_navigation = true; }
+        };
+    });
+    query_area.onkeydown = (e) => {
+        if (e.key == 'Tab' && !event.shiftKey && !user_prefers_tab_navigation) {
+            let elem = e.target;
+            let selection_start = elem.selectionStart;
+            let selection_end = elem.selectionEnd;
+            elem.value = elem.value.substring(0, elem.selectionStart) + '    ' + elem.value.substring(elem.selectionEnd);
+            elem.selectionStart = selection_start + 4;
+            elem.selectionEnd = selection_start + 4;
+            e.preventDefault();
+            return false;
+        }
+    };
+    function clearElement(id)
+    {
+        let elem = document.getElementById(id);
+        while (elem.firstChild) {
+            elem.removeChild(elem.lastChild);
+        }
+        elem.style.display = 'none';
+    }
+    function clear()
+    {
+        clearElement('data-table');
+        clearElement('graph');
+        clearElement('chart');
+        clearElement('data-unparsed');
+        clearElement('error');
+        document.getElementById('check-mark').display = 'none';
+        document.getElementById('hourglass').display = 'none';
+        document.getElementById('stats').innerText = '';
+        document.getElementById('logo-container').style.display = 'block';
+    }
+    function formatReadable(number = 0, decimals = 2, units = []) {
+        const k = 1000;
+        const i = number ? Math.floor(Math.log(number) / Math.log(k)) : 0;
+        const unit = units[i];
+        const dm = unit ? decimals : 0;
+        return Number(number / Math.pow(k, i)).toFixed(dm) + unit;
+    }
+    function formatReadableBytes(bytes) {
+        const units = [' B', ' KB', ' MB', ' GB', ' TB', ' PB', ' EB', ' ZB', ' YB'];
+        return formatReadable(bytes, 2, units);
+    }
+    function formatReadableRows(rows) {
+        const units = ['', ' thousand', ' million', ' billion', ' trillion', ' quadrillion'];
+        return formatReadable(rows, 2, units);
+    }
+    function renderResult(response)
+    {
+        clear();
+        let stats = document.getElementById('stats');
+        const seconds = response.statistics.elapsed.toFixed(3);
+        const rows = response.statistics.rows_read;
+        const bytes = response.statistics.bytes_read;
+        const formatted_bytes = formatReadableBytes(bytes);
+        const formatted_rows = formatReadableRows(rows);
+        stats.innerText = `Elapsed: ${seconds} sec, read ${formatted_rows} rows, ${formatted_bytes}.`;
+        /// We can also render graphs if user performed EXPLAIN PIPELINE graph=1 or EXPLAIN AST graph = 1
+        if (response.data.length > 3 && query_area.value.match(/^\s*EXPLAIN/i) && typeof(response.data[0][0]) === "string" && response.data[0][0].startsWith("digraph")) {
+            renderGraph(response);
+        } else {
+            renderTable(response);
+        }
+    }
+    function renderCell(cell, col_idx, settings)
+    {
+        let td = document.createElement('td');
+        let is_null = (cell === null);
+        let is_link = false;
+        /// Test: SELECT number, toString(number) AS str, number % 2 ? number : NULL AS nullable, range(number) AS arr, CAST((['hello', 'world'], [number, number % 2]) AS Map(String, UInt64)) AS map FROM numbers(10)
+        let text;
+        if (is_null) {
+            text = 'ᴺᵁᴸᴸ';
+        } else if (typeof(cell) === 'object') {
+            text = JSON.stringify(cell);
+        } else {
+            text = cell;
+            /// If it looks like URL, create a link. This is for convenience.
+            if (typeof(cell) == 'string' && cell.match(/^https?:\/\/\S+$/)) {
+                is_link = true;
+            }
+        }
+        let node = document.createTextNode(text);
+        if (is_link) {
+            let link = document.createElement('a');
+            link.appendChild(node);
+            link.href = text;
+            link.setAttribute('target', '_blank');
+            node = link;
+        }
+        if (settings.is_transposed) {
+            td.className = 'left transposed';
+        } else {
+            td.className = settings.column_is_number[col_idx] ? 'right' : 'left';
+        }
+        if (is_null) {
+            td.className += ' null';
+        }
+        /// If it's a number, render bar in background.
+        if (!settings.is_transposed && settings.column_need_render_bars[col_idx] && text > 0) {
+            const ratio = 100 * text / settings.column_maximums[col_idx];
+            let div = document.createElement('div');
+            div.style.width = '100%';
+            div.style.background = `linear-gradient(to right,
+                var(--bar-color) 0%, var(--bar-color) ${ratio}%,
+                transparent ${ratio}%, transparent 100%)`;
+            div.appendChild(node);
+            node = div;
+        }
+        td.appendChild(node);
+        return td;
+    }
+    function renderTableTransposed(response)
+    {
+        let tbody = document.createElement('tbody');
+        for (let col_idx in response.meta) {
+            let tr = document.createElement('tr');
+            {
+                let th = document.createElement('th');
+                th.className = 'right';
+                th.style.width = '0';
+                th.appendChild(document.createTextNode(response.meta[col_idx].name));
+                tr.appendChild(th);
+            }
+            for (let row_idx in response.data)
+            {
+                let cell = response.data[row_idx][col_idx];
+                const td = renderCell(cell, col_idx, {is_transposed: true});
+                tr.appendChild(td);
+            }
+            if (response.data.length == 0 && col_idx == 0)
+            {
+                /// If result is empty, show this fact with a style.
+                let td = document.createElement('td');
+                td.rowSpan = response.meta.length;
+                td.className = 'empty-result';
+                let div = document.createElement('div');
+                div.appendChild(document.createTextNode("empty result"));
+                div.className = 'empty-result';
+                td.appendChild(div);
+                tr.appendChild(td);
+            }
+            tbody.appendChild(tr);
+        }
+        let table = document.getElementById('data-table');
+        table.appendChild(tbody);
+        table.style.display = 'table';
+    }
+    function renderTable(response)
+    {
+        if (response.data.length <= 1 && response.meta.length >= 5) {
+            renderTableTransposed(response)
+            return;
+        }
+        const should_display_row_numbers = response.data.length > 3;
+        let thead = document.createElement('thead');
+        if (should_display_row_numbers) {
+            let th = document.createElement('th');
+            th.className = 'row-number';
+            th.appendChild(document.createTextNode('№'));
+            thead.appendChild(th);
+        }
+        for (let idx in response.meta) {
+            let th = document.createElement('th');
+            const name = document.createTextNode(response.meta[idx].name);
+            th.appendChild(name);
+            thead.appendChild(th);
+        }
+        /// To prevent hanging the browser, limit the number of cells in a table.
+        /// It's important to have the limit on number of cells, not just rows, because tables may be wide or narrow.
+        /// Also we permit rendering of more records but only if elapsed time is not large.
+        const max_rows = 10000 / response.meta.length;
+        const max_render_ms = 200;
+        let row_num = 0;
+        const column_is_number = response.meta.map(elem => !!elem.type.match(/^(Nullable\()?(U?Int|Decimal|Float)/));
+        const column_maximums = column_is_number.map((elem, idx) => elem ? Math.max(...response.data.map(row => row[idx])) : 0);
+        const column_minimums = column_is_number.map((elem, idx) => elem ? Math.min(...response.data.map(row => Math.max(0, row[idx]))) : 0);
+        const column_need_render_bars = column_is_number.map((elem, idx) => column_maximums[idx] > 0 && column_maximums[idx] > column_minimums[idx]);
+        const settings = {
+            is_transposed: false,
+            column_is_number: column_is_number,
+            column_maximums: column_maximums,
+            column_minimums: column_minimums,
+            column_need_render_bars: column_need_render_bars,
+        };
+        const start_time = performance.now();
+        let tbody = document.createElement('tbody');
+        for (let row_idx in response.data) {
+            let tr = document.createElement('tr');
+            if (should_display_row_numbers) {
+                let td = document.createElement('td');
+                td.className = 'row-number';
+                td.appendChild(document.createTextNode(1 + +row_idx));
+                tr.appendChild(td);
+            }
+            for (let col_idx in response.data[row_idx]) {
+                let cell = response.data[row_idx][col_idx];
+                const td = renderCell(cell, col_idx, settings);
+                td.onclick = () => { td.classList.add('td-selected') };
+                td.onmouseenter = () => {
+                    td.classList.add('td-hover-hysteresis');
+                    td.onmouseleave = () => {
+                        setTimeout(() => { td && td.classList.remove('td-hover-hysteresis') }, 1000);
+                    };
+                };
+                tr.appendChild(td);
+            }
+            tbody.appendChild(tr);
+            ++row_num;
+            if (row_num >= max_rows && performance.now() - start_time >= max_render_ms) {
+                break;
+            }
+        }
+        let table = document.getElementById('data-table');
+        table.appendChild(thead);
+        table.appendChild(tbody);
+        table.style.display = 'table';
+    }
+    /// A function to render raw data when non-default format is specified.
+    function renderUnparsedResult(response)
+    {
+        clear();
+        let data = document.getElementById('data-unparsed')
+        if (response === '') {
+            /// TODO: Fade or remove previous result when new request will be performed.
+            response = 'Ok.';
+        }
+        data.innerText = response;
+        /// inline-block make width adjust to the size of content.
+        data.style.display = 'inline-block';
+    }
+    function renderError(response)
+    {
+        clear();
+        document.getElementById('error').innerText = response ? response : "No response.";
+        document.getElementById('error').style.display = 'block';
+        document.getElementById('logo-container').style.display = 'none';
+    }
+    /// Huge JS libraries should be loaded only if needed.
+    function loadJS(src, integrity) {
+        return new Promise((resolve, reject) => {
+            const script = document.createElement('script');
+            script.src = src;
+            if (integrity) {
+                script.crossOrigin = 'anonymous';
+                script.integrity = integrity;
+            } else {
+                console.warn('no integrity for', src)
+            }
+            script.addEventListener('load', function() { resolve(true); });
+            document.head.appendChild(script);
+        });
+    }
+    let load_dagre_promise;
+    function loadDagre() {
+        if (load_dagre_promise) { return load_dagre_promise; }
+        load_dagre_promise = Promise.all([
+            loadJS('https://dagrejs.github.io/project/dagre/v0.8.5/dagre.min.js',
+                   'sha384-2IH3T69EIKYC4c+RXZifZRvaH5SRUdacJW7j6HtE5rQbvLhKKdawxq6vpIzJ7j9M'),
+            loadJS('https://dagrejs.github.io/project/graphlib-dot/v0.6.4/graphlib-dot.min.js',
+                   'sha384-Q7oatU+b+y0oTkSoiRH9wTLH6sROySROCILZso/AbMMm9uKeq++r8ujD4l4f+CWj'),
+            loadJS('https://dagrejs.github.io/project/dagre-d3/v0.6.4/dagre-d3.min.js',
+                   'sha384-9N1ty7Yz7VKL3aJbOk+8ParYNW8G5W+MvxEfFL9G7CRYPmkHI9gJqyAfSI/8190W'),
+            loadJS('https://cdn.jsdelivr.net/npm/d3@7.0.0',
+                   'sha384-S+Kf0r6YzKIhKA8d1k2/xtYv+j0xYUU3E7+5YLrcPVab6hBh/r1J6cq90OXhw80u'),
+        ]);
+        return load_dagre_promise;
+    }
+    async function renderGraph(response)
+    {
+        await loadDagre();
+        /// https://github.com/dagrejs/dagre-d3/issues/131
+        const dot = response.data.reduce((acc, row) => acc + '\n' + row[0].replace(/shape\s*=\s*box/g, 'shape=rect'));
+        let graph = graphlibDot.read(dot);
+        graph.graph().rankdir = 'TB';
+        let render = new dagreD3.render();
+        let svg = document.getElementById('graph');
+        svg.style.display = 'block';
+        render(d3.select("#graph"), graph);
+        svg.style.width = graph.graph().width;
+        svg.style.height = graph.graph().height;
+    }
+    let load_uplot_promise;
+    function loadUplot() {
+        if (load_uplot_promise) { return load_uplot_promise; }
+        load_uplot_promise = loadJS('https://cdn.jsdelivr.net/npm/uplot@1.6.21/dist/uPlot.iife.min.js',
+            'sha384-TwdJPnTsKP6pnvFZZKda0WJCXpjcHCa7MYHmjrYDu6rsEsb/UnFdoL0phS5ODqTA');
+        return load_uplot_promise;
+    }
+    let uplot;
+    async function renderChart(json)
+    {
+        await loadUplot();
+        clear();
+        let chart = document.getElementById('chart');
+        chart.style.display = 'block';
+        let paths = uPlot.paths.stepped({align:  1});
+        const [line_color, fill_color, grid_color, axes_color] = theme == 'light'
+            ? ["#F80", "#FED", "#c7d0d9", "#2c3235"]
+            : ["#888", "#045", "#2c3235", "#c7d0d9"];
+        const opts = {
+            width: chart.clientWidth,
+            height: chart.clientHeight,
+            scales: { x: { time: json[0][0] > 1000000000 && json[0][0] < 2000000000 } },
+            axes: [ { stroke: axes_color,
+                      grid: { width: 1 / devicePixelRatio, stroke: grid_color },
+					  ticks: { width: 1 / devicePixelRatio, stroke: grid_color } },
+					{ stroke: axes_color,
+					  grid: { width: 1 / devicePixelRatio, stroke: grid_color },
+					  ticks: { width: 1 / devicePixelRatio, stroke: grid_color } } ],
+            series: [ { label: "x" },
+                      { label: "y", stroke: line_color, fill: fill_color,
+                        drawStyle: 0, lineInterpolation: 1, paths } ],
+            padding: [ null, null, null, (Math.ceil(Math.log10(Math.max(...json[1]))) + Math.floor(Math.log10(Math.max(...json[1])) / 3)) * 6 ],
+        };
+        uplot = new uPlot(opts, json, chart);
+    }
+    function resizeChart() {
+        if (uplot) {
+            let chart = document.getElementById('chart');
+            uplot.setSize({ width: chart.clientWidth, height: chart.clientHeight });
+        }
+    }
+    function redrawChart() {
+        if (uplot && document.getElementById('chart').style.display == 'block') {
+            renderChart(uplot.data);
+        }
+    }
+    new ResizeObserver(resizeChart).observe(document.getElementById('chart'));
+    /// First we check if theme is set via the 'theme' GET parameter, if not, we check localStorage, otherwise we check OS preference.
+    let theme = current_url.searchParams.get('theme');
+    if (['dark', 'light'].indexOf(theme) === -1) {
+        theme = window.localStorage.getItem('theme');
+    }
+    if (!theme) {
+        theme = 'light';
+    }
+    function setColorTheme(new_theme, update_preference) {
+        theme = new_theme;
+        if (update_preference) {
+            window.localStorage.setItem('theme', theme);
+        }
+        document.documentElement.setAttribute('data-theme', theme);
+        redrawChart();
+    }
+    if (theme) {
+        document.documentElement.setAttribute('data-theme', theme);
+    } else {
+        /// Obtain system-level user preference
+        const media_query_list = window.matchMedia('(prefers-color-scheme: dark)');
+        if (media_query_list.matches) {
+            setColorTheme('dark');
+        }
+        /// There is a rumor that on some computers, the theme is changing automatically on day/night.
+        media_query_list.addEventListener('change', function(e) {
+            setColorTheme(e.matches ? 'dark' : 'light');
+        });
+    }
+    document.getElementById('toggle-light').onclick = function() {
+        setColorTheme('light', true);
+    }
+    document.getElementById('toggle-dark').onclick = function() {
+        setColorTheme('dark', true);
+    }
+</script>
+</html>

requirements.txt ADDED Viewed

	@@ -0,0 +1,2 @@


1	+ Flask
2	+ chdb