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node_modules/node-red-contrib-ui-upload/LICENSE.md
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node_modules/node-red-contrib-ui-upload/LICENSE.md
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||||
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54
node_modules/node-red-contrib-ui-upload/README.md
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54
node_modules/node-red-contrib-ui-upload/README.md
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||||
# node-red-contrib-ui-upload
|
||||
|
||||
[Node-RED Dashboard](https://github.com/node-red/node-red-dashboard) UI widget node for **uploading** a file content by WebSocket (Socket.io) streaming.
|
||||
|
||||
Supports: browse for file or drag & drop; pause & resume, replay; custom chunk size; backpressure.
|
||||
|
||||
Meant to be combined with [node-red-contrib-chunks-to-lines](https://github.com/alexandrainst/node-red-contrib-chunks-to-lines).
|
||||
|
||||
Screenshot in the Node-RED Dashboard:
|
||||
|
||||
|
||||
|
||||
In a Node-RED flow, this *Upload node* (using *text* transfer type) can advantageously be connected to some standard nodes such as:
|
||||
|
||||
* *Split node* using the option *Handle as a stream of messages*: to read one line at a time (works well, also for very large uploaded files)
|
||||
* *Join node* using the *automatic* mode: to reassemble the uploaded chunks into one single message / string (only for relatively small uploaded files, which can fit in memory)
|
||||
|
||||
Example: [flow.json](examples/flow.json)
|
||||
|
||||
|
||||
|
||||
But this node really shines when combined with the [node-red-contrib-chunks-to-lines](https://github.com/alexandrainst/node-red-contrib-chunks-to-lines) node, which can split in a more efficient way, e.g. safe for Unicode and with built-in backpressure for automatic buffering optimisation.
|
||||
|
||||
Example: [flow.json](https://github.com/alexandrainst/node-red-contrib-chunks-to-lines/blob/main/examples/flow.json)
|
||||
|
||||
|
||||
|
||||
See also a more advanced [example of upload of a large CSV file to an SQL database](https://flows.nodered.org/flow/687918dd5cb66a3bfc2a661e15ef4237).
|
||||
|
||||
## Transfer types
|
||||
|
||||
* When using *binary* transfer type, the data is uploaded as chunks of byte arrays. This mode can safely transmit any type of file, but requires a transformation before further use (which [node-red-contrib-chunks-to-lines](https://github.com/alexandrainst/node-red-contrib-chunks-to-lines) can handle).
|
||||
* When using *text* transfer type, the data is uploaded as chunks of ASCII (more precisely Windows-1252 encoding). This mode is **not able** to properly transmit non-ASCII data such as multibyte strings (e.g. Unicode / UTF-8) or binary files, but is convenient for basic ASCII text.
|
||||
|
||||
## Backpressure
|
||||
|
||||
This node supports *backpressure* / *flow control*:
|
||||
it can wait for a *tick* before uploading the next chunk of data,
|
||||
to make sure the rest of your Node-RED flow is ready to process more data, instead of risking an out-of-memory condition.
|
||||
|
||||
To make this behaviour potentially automatic (avoiding manual wires), this node declares its ability by exposing a truthy `node.tickConsumer` for downstream nodes to detect this feature.
|
||||
Using this approach, the backpressure is done automatically when using the [node-red-contrib-chunks-to-lines](https://github.com/alexandrainst/node-red-contrib-chunks-to-lines) node.
|
||||
|
||||
For a manual approach, just send `{ tick: true }` to the node for triggering the upload of the next chunk of data.
|
||||
|
||||
By default, in absence of wired input on this node, a tick will be automatically generated upon full reception of a chunk of data to trigger the upload of the next one.
|
||||
|
||||
This backpressure mechanism also gives time to other nodes communicating on the same shared WebSocket and avoids disconnections when uploading large files.
|
||||
|
||||
## Credits
|
||||
|
||||
License: [Apache 2.0](LICENSE.md), 2020-2022.
|
||||
|
||||
Originally made by [Alexandre Alapetite](https://alexandra.dk/alexandre.alapetite) at the [Alexandra Institute](https://alexandra.dk).
|
||||
55
node_modules/node-red-contrib-ui-upload/package.json
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node_modules/node-red-contrib-ui-upload/package.json
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||||
{
|
||||
"name": "node-red-contrib-ui-upload",
|
||||
"version": "0.8.1",
|
||||
"description": "Node-RED Dashboard UI widget node for uploading a file content by Socket.io streaming",
|
||||
"keywords": [
|
||||
"upload",
|
||||
"backpressure",
|
||||
"websocket",
|
||||
"ui",
|
||||
"dashboard",
|
||||
"node-red",
|
||||
"node-red-contrib",
|
||||
"node-red-ui",
|
||||
"nodered"
|
||||
],
|
||||
"author": {
|
||||
"name": "Alexandre Alapetite",
|
||||
"url": "https://alexandra.dk/alexandre.alapetite"
|
||||
},
|
||||
"license": "Apache-2.0",
|
||||
"main": "ui_upload.js",
|
||||
"engines": {
|
||||
"node": ">=8"
|
||||
},
|
||||
"node-red": {
|
||||
"version": ">=0.20.0",
|
||||
"nodes": {
|
||||
"ui_upload": "ui_upload.js"
|
||||
}
|
||||
},
|
||||
"files": [
|
||||
"ui_upload.html",
|
||||
"ui_upload.js"
|
||||
],
|
||||
"repository": {
|
||||
"type": "git",
|
||||
"url": "https://github.com/alexandrainst/node-red-contrib-ui-upload"
|
||||
},
|
||||
"devDependencies": {
|
||||
"eslint": "^8.51.0",
|
||||
"eslint-config-standard": "^17.1.0",
|
||||
"eslint-plugin-html": "^7.1.0",
|
||||
"eslint-plugin-import": "^2.28.1",
|
||||
"eslint-plugin-n": "^16.2.0",
|
||||
"eslint-plugin-promise": "^6.1.1"
|
||||
},
|
||||
"scripts": {
|
||||
"start": "node ./index.js",
|
||||
"eslint": "eslint --ext .js,.html .",
|
||||
"eslint_fix": "eslint --fix --ext .js,.html .",
|
||||
"fix": "npm run eslint_fix",
|
||||
"pretest": "npm run-script eslint",
|
||||
"test": "npm -v"
|
||||
}
|
||||
}
|
||||
87
node_modules/node-red-contrib-ui-upload/ui_upload.html
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node_modules/node-red-contrib-ui-upload/ui_upload.html
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||||
<script type="text/x-red" data-template-name="ui_upload">
|
||||
<div class="form-row" id="template-row-group">
|
||||
<label for="node-input-group"><i class="fa fa-table"></i> Group</label>
|
||||
<input type="text" id="node-input-group" />
|
||||
</div>
|
||||
<div class="form-row" id="template-row-size">
|
||||
<label><i class="fa fa-object-group"></i> Size</label>
|
||||
<input type="hidden" id="node-input-width" />
|
||||
<input type="hidden" id="node-input-height" />
|
||||
<button class="editor-button" id="node-input-size"></button>
|
||||
</div>
|
||||
<div class="form-row">
|
||||
<label for="node-input-title"><i class="fa fa-i-cursor"></i> Title</label>
|
||||
<input type="text" id="node-input-title" />
|
||||
</div>
|
||||
<div class="form-row">
|
||||
<label for="node-input-name"><i class="fa fa-tag"></i> Name</label>
|
||||
<input type="text" id="node-input-name" />
|
||||
</div>
|
||||
<div class="form-row">
|
||||
<label for="node-input-accept"><i class="fa fa-filter"></i> Accept file types</label>
|
||||
<input type="text" id="node-input-accept" placeholder="text/*,.csv,.txt" />
|
||||
</div>
|
||||
<div class="form-row">
|
||||
<label for="node-input-chunk"><i class="fa fa-sign-in"></i> Chunk size (kB)</label>
|
||||
<input type="number" id="node-input-chunk" min="1" max="2048" />
|
||||
</div>
|
||||
<div class="form-row">
|
||||
<label for="node-input-transfer"><i class="fa fa-flag"></i> Transfer type</label>
|
||||
<select id="node-input-transfer">
|
||||
<option value="text">Text (Windows-1252 / ASCII / ANSI)</option>
|
||||
<option value="binary">Binary</option>
|
||||
</select>
|
||||
</div>
|
||||
</script>
|
||||
|
||||
<script type="text/x-red" data-help-name="ui_upload">
|
||||
<p>UI widget node for uploading files content by Socket.io streaming</p>
|
||||
</script>
|
||||
|
||||
<script type="text/javascript">
|
||||
/* global RED:false, $:false */
|
||||
|
||||
function uiUploadConf(NAME) {
|
||||
const ICON = 'white-globe.svg';
|
||||
|
||||
return {
|
||||
category: 'dashboard',
|
||||
color: 'rgb(63, 173, 181)',
|
||||
defaults: {
|
||||
group: { type: 'ui_group', required: true },
|
||||
title: { value: 'upload' },
|
||||
accept: { value: '' },
|
||||
name: { value: '' },
|
||||
order: { value: 0 },
|
||||
width: {
|
||||
value: 0,
|
||||
validate: function (v) {
|
||||
const width = +v || 0;
|
||||
const currentGroup = $('#node-input-group').val() || this.group;
|
||||
const groupNode = RED.nodes.node(currentGroup);
|
||||
const valid = !groupNode || +width <= +groupNode.width;
|
||||
$('#node-input-size').toggleClass('input-error', !valid);
|
||||
return valid;
|
||||
},
|
||||
},
|
||||
height: { value: 5 },
|
||||
chunk: { value: 256 },
|
||||
transfer: { value: 'binary' },
|
||||
},
|
||||
inputs: 1,
|
||||
outputs: 1,
|
||||
icon: ICON,
|
||||
paletteLabel: NAME,
|
||||
label: function () { return this.name || NAME; },
|
||||
oneditprepare: function () {
|
||||
$('#node-input-size').elementSizer({
|
||||
width: '#node-input-width',
|
||||
height: '#node-input-height',
|
||||
group: '#node-input-group',
|
||||
});
|
||||
},
|
||||
};
|
||||
}
|
||||
|
||||
RED.nodes.registerType('ui_upload', uiUploadConf('upload'));
|
||||
</script>
|
||||
344
node_modules/node-red-contrib-ui-upload/ui_upload.js
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344
node_modules/node-red-contrib-ui-upload/ui_upload.js
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|
||||
'use strict';
|
||||
|
||||
function html(config) {
|
||||
const jsonConfig = JSON.stringify(config);
|
||||
return String.raw`
|
||||
<style>
|
||||
.ui_upload {
|
||||
height: 100%;
|
||||
display: flex;
|
||||
align-items: center;
|
||||
flex-wrap: wrap;
|
||||
justify-content: space-evenly;
|
||||
}
|
||||
.ui_upload p.title {
|
||||
background: transparent !important;
|
||||
font-size: 175%;
|
||||
text-align: center;
|
||||
width: 99%;
|
||||
}
|
||||
.ui_upload > progress {
|
||||
width: 90%;
|
||||
}
|
||||
.ui_upload.done > progress {
|
||||
display: none;
|
||||
}
|
||||
.ui_upload > p.result {
|
||||
font-size: 150%;
|
||||
}
|
||||
.ui_upload:not(.done) > p.result {
|
||||
display: none;
|
||||
}
|
||||
.ui_upload > button {
|
||||
background: transparent;
|
||||
border: 0;
|
||||
font-size: xx-large;
|
||||
margin: 0;
|
||||
padding: 0;
|
||||
}
|
||||
.ui_upload > button[disabled] {
|
||||
filter: grayscale(1) brightness(1.5);
|
||||
}
|
||||
</style>
|
||||
|
||||
<div id="ui_upload-{{unique}}" class="ui_upload"
|
||||
ng-init='init(` + jsonConfig + `)'
|
||||
style="width:{{width}}"
|
||||
ng-on-dragleave="ondragleave($event)" ng-on-dragenter="ondragenter($event)"
|
||||
ng-on-dragover="ondragover($event)" ng-on-drop="ondrop($event)">
|
||||
<p class="title">{{title}}</p>
|
||||
<progress value="0" max="100"></progress>
|
||||
<p class="result">✔️ <small>0s</small></p>
|
||||
<input type="file" ng-on-change="onchange($event)" name="ui_upload-filename" accept="{{accept}}" />
|
||||
<button class="play" ng-click="playClick($event)" disabled="disabled">▶️</button>
|
||||
<button class="stop" ng-click="stopClick($event)" disabled="disabled">⏹️</button>
|
||||
</div>
|
||||
`;
|
||||
}
|
||||
|
||||
// NB: This function goes through a toString + eval by Node-RED Dashboard, so no scope
|
||||
function initController($scope, events) {
|
||||
$scope.init = function (config) {
|
||||
$scope.config = config;
|
||||
$scope.unique = $scope.$eval('$id');
|
||||
$scope.title = config.title || config.name || 'Upload';
|
||||
$scope.accept = '' + config.accept;
|
||||
$scope.chunkCallback = null;
|
||||
$scope.downstreamReady = false;
|
||||
// TODO: Find a cleaner approach for the width
|
||||
$scope.width = (Math.max(config.width || 12, 4) * 52.5) + 'px';
|
||||
};
|
||||
|
||||
$scope.$watch('msg', function (msg) {
|
||||
// Message received from back-end
|
||||
if (msg && msg.tick && !$scope.stop && !$scope.pause) {
|
||||
if ($scope.chunkCallback) {
|
||||
$scope.chunkCallback.f($scope.chunkCallback.e);
|
||||
} else {
|
||||
$scope.downstreamReady = true;
|
||||
}
|
||||
}
|
||||
});
|
||||
|
||||
function sendFile(file) {
|
||||
const div = document.getElementById('ui_upload-' + $scope.unique);
|
||||
div.classList.remove('done');
|
||||
const progress = div.querySelector('progress');
|
||||
$scope.stop = false;
|
||||
$scope.downstreamReady = true;
|
||||
|
||||
delete $scope.duration;
|
||||
const startTime = Date.now() - 1;
|
||||
const chunk = 1024 * Math.max($scope.config.chunk || 1024, 1);
|
||||
const count = Math.ceil(file.size / chunk);
|
||||
const partsId = file.name + ';' + file.size + ';' + Date.now();
|
||||
let partsIndex = -1;
|
||||
let loaded = 0;
|
||||
|
||||
let blob;
|
||||
const fileReader = new FileReader();
|
||||
fileReader.onload = function (e) {
|
||||
if ($scope.stop) {
|
||||
// Send special paquet to inform the rest of the pipeline
|
||||
$scope.send({
|
||||
file: {
|
||||
lastModified: file.lastModified,
|
||||
name: file.name,
|
||||
size: file.size,
|
||||
type: file.type,
|
||||
},
|
||||
parts: {
|
||||
id: partsId,
|
||||
type: 'string',
|
||||
ch: '',
|
||||
index: partsIndex + 1,
|
||||
count: partsIndex + 2,
|
||||
chunk: chunk,
|
||||
abort: true,
|
||||
},
|
||||
payload: '',
|
||||
});
|
||||
$scope.stopClick();
|
||||
return;
|
||||
} else if (!$scope.chunkCallback && ($scope.pause || !$scope.downstreamReady)) {
|
||||
$scope.chunkCallback = { f: fileReader.onload, e: e };
|
||||
return;
|
||||
}
|
||||
partsIndex++;
|
||||
$scope.chunkCallback = false;
|
||||
$scope.downstreamReady = false;
|
||||
$scope.send({
|
||||
file: {
|
||||
lastModified: file.lastModified,
|
||||
name: file.name,
|
||||
size: file.size,
|
||||
type: file.type,
|
||||
},
|
||||
parts: {
|
||||
id: partsId,
|
||||
type: 'string',
|
||||
ch: '',
|
||||
index: partsIndex,
|
||||
count: count,
|
||||
chunk: chunk,
|
||||
},
|
||||
payload: e.target.result,
|
||||
complete: partsIndex + 1 >= count ? true : undefined,
|
||||
});
|
||||
loaded += chunk;
|
||||
progress.value = 100 * loaded / file.size;
|
||||
if (loaded <= file.size) {
|
||||
blob = file.slice(loaded, loaded + chunk);
|
||||
if ($scope.config.transfer === 'text') {
|
||||
fileReader.readAsText(blob, 'Windows-1252');
|
||||
} else {
|
||||
fileReader.readAsArrayBuffer(blob);
|
||||
}
|
||||
} else {
|
||||
loaded = file.size;
|
||||
$scope.duration = Math.ceil((Date.now() - startTime) / 1000);
|
||||
$scope.stopClick();
|
||||
}
|
||||
};
|
||||
|
||||
blob = file.slice(0, chunk);
|
||||
if ($scope.config.transfer === 'text') {
|
||||
// NB: Can only be a single-byte encoding / ASCII, so no Unicode / UTF-8!
|
||||
fileReader.readAsText(blob, 'Windows-1252');
|
||||
} else {
|
||||
fileReader.readAsArrayBuffer(blob);
|
||||
}
|
||||
}
|
||||
|
||||
let backgroundColor = '';
|
||||
|
||||
$scope.ondragleave = function (e) {
|
||||
e.preventDefault();
|
||||
e.stopPropagation();
|
||||
const div = e.currentTarget;
|
||||
div.style.background = backgroundColor;
|
||||
};
|
||||
|
||||
$scope.ondragenter = function (e) {
|
||||
e.preventDefault();
|
||||
e.stopPropagation();
|
||||
};
|
||||
|
||||
$scope.ondragover = function (e) {
|
||||
e.preventDefault();
|
||||
e.stopPropagation();
|
||||
const div = e.currentTarget;
|
||||
backgroundColor |= div.style.background;
|
||||
div.style.background = '#55E';
|
||||
};
|
||||
|
||||
$scope.ondrop = function (e) {
|
||||
const dataTransfer = e.dataTransfer || e.originalEvent.dataTransfer;
|
||||
if (dataTransfer && dataTransfer.files && dataTransfer.files.length > 0) {
|
||||
e.preventDefault();
|
||||
e.stopPropagation();
|
||||
$scope.stopClick(e);
|
||||
const div = e.currentTarget;
|
||||
div.style.background = '#5E5';
|
||||
setTimeout(function () { div.style.background = backgroundColor; }, 300);
|
||||
const input = div.querySelector('input');
|
||||
input.files = dataTransfer.files;
|
||||
div.querySelector('.play').innerHTML = '⏸️';
|
||||
div.querySelector('.play').disabled = false;
|
||||
div.querySelector('.stop').disabled = false;
|
||||
sendFile(dataTransfer.files[0]);
|
||||
}
|
||||
};
|
||||
|
||||
$scope.playClick = function (e) {
|
||||
const div = document.getElementById('ui_upload-' + $scope.unique);
|
||||
if ($scope.pause) {
|
||||
div.querySelector('.play').innerHTML = '⏸️';
|
||||
$scope.pause = false;
|
||||
$scope.chunkCallback.f($scope.chunkCallback.e);
|
||||
} else if (!$scope.stop) {
|
||||
$scope.pause = true;
|
||||
div.querySelector('.play').innerHTML = '▶️';
|
||||
} else {
|
||||
$scope.stopClick(e);
|
||||
const input = div.querySelector('input');
|
||||
if (input.files && input.files.length > 0) {
|
||||
div.querySelector('.play').innerHTML = '⏸️';
|
||||
div.querySelector('.play').disabled = false;
|
||||
div.querySelector('.stop').disabled = false;
|
||||
sendFile(input.files[0]);
|
||||
}
|
||||
}
|
||||
};
|
||||
|
||||
$scope.stopClick = function (e) {
|
||||
$scope.stop = true;
|
||||
$scope.pause = false;
|
||||
$scope.downstreamReady = false;
|
||||
$scope.chunkCallback = null;
|
||||
const div = document.getElementById('ui_upload-' + $scope.unique);
|
||||
div.querySelector('progress').value = 0;
|
||||
if ($scope.duration) {
|
||||
div.classList.add('done');
|
||||
div.querySelector('p.result > small').innerHTML = '' + $scope.duration + 's';
|
||||
}
|
||||
div.querySelector('.play').innerHTML = '▶️';
|
||||
div.querySelector('.play').disabled = false;
|
||||
div.querySelector('.stop').disabled = true;
|
||||
};
|
||||
|
||||
$scope.onchange = function (e) {
|
||||
$scope.stopClick(e);
|
||||
};
|
||||
}
|
||||
|
||||
/**
|
||||
* Return an incoming node ID if the node has any input wired to it, false otherwise.
|
||||
* If filter callback is not null, then this function filters incoming nodes.
|
||||
*/
|
||||
function findInputNodeId(toNode, filter = null) {
|
||||
if (toNode && toNode._flow && toNode._flow.global) {
|
||||
const allNodes = toNode._flow.global.allNodes;
|
||||
for (const fromNodeId of Object.keys(allNodes)) {
|
||||
const fromNode = allNodes[fromNodeId];
|
||||
if (fromNode && fromNode.wires) {
|
||||
for (const wireId of Object.keys(fromNode.wires)) {
|
||||
const wire = fromNode.wires[wireId];
|
||||
for (const toNodeId of wire) {
|
||||
if (toNode.id === toNodeId && (!filter || filter(fromNode))) {
|
||||
return fromNode.id;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
return false;
|
||||
}
|
||||
|
||||
module.exports = function (RED) {
|
||||
let ui;
|
||||
|
||||
function uiUpload(config) {
|
||||
const node = this; // jshint ignore:line
|
||||
|
||||
// Declare the ability of this node to consume ticks from downstream for back-pressure
|
||||
node.tickConsumer = true;
|
||||
let tickDownstreamId;
|
||||
|
||||
try {
|
||||
if (!ui) {
|
||||
// load Dashboard API
|
||||
ui = RED.require('node-red-dashboard')(RED);
|
||||
}
|
||||
|
||||
RED.nodes.createNode(node, config);
|
||||
if (!config || !config.group) {
|
||||
return;
|
||||
}
|
||||
|
||||
// Defined in https://github.com/node-red/node-red-dashboard/blob/39b095586bdbd517ffbce1efff35227283edda4c/index.js
|
||||
const done = ui.addWidget({
|
||||
node: node,
|
||||
format: html(config),
|
||||
templateScope: 'local',
|
||||
group: config.group,
|
||||
order: config.order,
|
||||
height: Math.max(config.height || 5, 3),
|
||||
emitOnlyNewValues: false,
|
||||
forwardInputMessages: false,
|
||||
storeFrontEndInputAsState: false,
|
||||
persistantFrontEndValue: false,
|
||||
|
||||
// callback to prepare the message that is emitted to the front-end
|
||||
beforeEmit: function (msg, value) {
|
||||
return { msg };
|
||||
},
|
||||
|
||||
// callback to prepare the message that is sent to the output
|
||||
beforeSend: function (msg, orig) {
|
||||
if (tickDownstreamId === undefined) {
|
||||
// Search for any output node handling ticks for back-pressure,
|
||||
// or any input node (which must take this responsability)
|
||||
tickDownstreamId = findInputNodeId(node, (n) => n && n.tickConsumer) || findInputNodeId(node);
|
||||
}
|
||||
if (!tickDownstreamId) {
|
||||
// If there is no tick provider downstream, send default tick for back-pressure
|
||||
node.receive({ tick: true });
|
||||
}
|
||||
if (orig) {
|
||||
return orig.msg;
|
||||
}
|
||||
},
|
||||
|
||||
// callback to initialize in controller
|
||||
initController: initController,
|
||||
});
|
||||
node.on('close', done);
|
||||
} catch (ex) {
|
||||
console.error(ex);
|
||||
}
|
||||
}
|
||||
|
||||
RED.nodes.registerType('ui_upload', uiUpload);
|
||||
};
|
||||
Reference in New Issue
Block a user