I am using a library called SheetJS and I want to read an excel sheet that resides on the server without using nodejs, only pure javascript. Is this possible?
There is a message in the documentation that says "readFile is only available in server environments. Browsers have no API for reading arbitrary files given a path, so another strategy must be used"
With the above message, I assume the author is referring to a situation where the file is residing on the client side.
This is what I have done so far
var wb = XLSX.readFile("myFile.xlsx"); //my file is in same directory on server
I get error "xlsx.full.min.js:22 Uncaught TypeError: Cannot read property 'readFileSync' of undefined"
This worked for me
/* set up async GET request */
var req = new XMLHttpRequest();
req.open("GET", url, true);
req.responseType = "arraybuffer";
req.onload = function(e) {
var data = new Uint8Array(req.response);
var workbook = XLSX.read(data, {type:"array"});
/* DO SOMETHING WITH workbook HERE */
}
req.send();
I had many issues with reading the file server-side, with a number of errors including type error, charCodeAt. So this provides a client and server-side solution using a reader. The excel file comes from a file upload button, and uses node.js.
Client-side:
let excelInput = document.getElementById("fileToUpload");
let excelFile = excelInput.files[0];
let reader = new FileReader();
So you get the file using files[0] from that element and create a fileReader.
You can see Aymkdn's solution on Github. https://github.com/SheetJS/sheetjs/issues/532. It uses the Uint8Array to work.
reader.readAsArrayBuffer(excelFile);
reader.onload = function() {
excelArray = new Uint8Array(reader.result); //returns Uint8Array using the result of reader
let binary = "";
var length = excelArray.byteLength;
for (var i = 0; i < length; i++) {
binary += String.fromCharCode(excelArray[i]);
//uses a for loop to alter excelArray to binary
}
let formData = new FormData(); //create form data
formData.append("excel", binary); //append binary to it
fetch('/excel', {method: "POST", body: formData}) //post as normal
.then((data) => {
console.log('Success:', data);
})
.catch((error) => {
console.error('Error:', error);
});
}
Server-side:
app.post('/excel', function(req, res) {
let data = req.body;
var workbook = sheetJS.read(data, {type: 'buffer'});
console.log("workbook is", workbook);
res.send();
}
Related
I'm trying to zip varying amounts of files so that one zip folder can be served to the user instead of them having to click multiple anchor tags. I am using the System.IO.Compression namespace in asp.net core 3.1 to create the zip folder.
Here is the code I'm using to create the Zip folder.
public IActionResult DownloadPartFiles(string[] fileLocations, string[] fileNames)
{
List<InMemoryFile> files = new List<InMemoryFile>();
for (int i = 0; i < fileNames.Length; i++)
{
InMemoryFile inMemoryFile = GetInMemoryFile(fileLocations[i], fileNames[i]).Result;
files.Add(inMemoryFile);
}
byte[] archiveFile;
using (MemoryStream archiveStream = new MemoryStream())
{
using (ZipArchive archive = new ZipArchive(archiveStream, ZipArchiveMode.Create, true))
{
foreach (InMemoryFile file in files)
{
ZipArchiveEntry zipArchiveEntry = archive.CreateEntry(file.FileName, CompressionLevel.Fastest);
using (Stream zipStream = zipArchiveEntry.Open())
{
zipStream.Write(file.Content, 0, file.Content.Length);
zipStream.Close();
}
}
archiveStream.Position = 0;
}
archiveFile = archiveStream.ToArray();
}
return File(archiveFile, "application/octet-stream");
}
The files I am trying to zip are stored remotely so I grab them with this block of code. The InMemoryFile is a class to group the file name and file bytes together.
private async Task<InMemoryFile> GetInMemoryFile(string fileLocation, string fileName)
{
InMemoryFile file;
using (HttpClient client = new HttpClient())
using (HttpResponseMessage response = await client.GetAsync(fileLocation))
{
byte[] fileContent = await response.Content.ReadAsByteArrayAsync();
file = new InMemoryFile(fileName, fileContent);
}
return file;
}
The DownloadPartFiles method is called using Ajax. I grab the remote paths to the files and their respective names using javascript and pass them into the Ajax call.
function downloadAllFiles() {
let partTable = document.getElementById("partTable");
let linkElements = partTable.getElementsByTagName('a');
let urls = [];
for (let i = 0; i < linkElements.length; i++) {
urls.push(linkElements[i].href);
}
if (urls.length != 0) {
var fileNames = [];
for (let i = 0; i < linkElements.length; i++) {
fileNames.push(linkElements[i].innerText);
}
$.ajax({
type: "POST",
url: "/WebOrder/DownloadPartFiles/",
data: { 'fileLocations': urls, 'fileNames': fileNames },
success: function (response) {
var blob = new Blob([response], { type: "application/zip" });
var link = document.createElement('a');
link.href = window.URL.createObjectURL(blob);
link.download = "PartFiles.zip";
link.click();
window.URL.revokeObjectURL(blob);
},
failure: function (response) {
alert(response.responseText);
},
error: function (response) {
alert(response.responseText);
}
});
}
}
Now the issue I keep running into is that I can't open the zip folder within Windows 10. Every time I try to open the zip folder using Windows or 7-zip I get an error message that the folder can't be opened or the folder is invalid. I've tried looking at various similar issues on stackoverflow, ie Invalid zip file after creating it with System.IO.Compression, but still can't figure out why this is.
Could it be the encoding? I found that Ajax expects its responses to be encoded UTF-8 and when I view the zip file using notepad++ with UTF-8 I see that there are � characters indicating corruption.
Any thoughts on this would be helpful. Let me know if more information is needed.
If one of the corrupt zip files is needed I can provide that as well.
Edit:
I have since changed my method of receiving the byte array in javascript. I am using a XMLHttpRequest to receive the byte array.
var parameters = {};
parameters.FileLocations = urls;
parameters.FileNames = fileNames;
var xmlhttp = new XMLHttpRequest();
xmlhttp.open("POST", "/WebOrder/DownloadPartFiles/", true);
xmlhttp.setRequestHeader("Content-Type", "application/json");
xmlhttp.responseType = "arraybuffer";
xmlhttp.onload = function (oEvent) {
var arrayBuffer = xmlhttp.response;
if (arrayBuffer) {
var byteArray = new Uint8Array(arrayBuffer);
var blob = new Blob([byteArray], { type: "application/zip" });
var link = document.createElement('a');
link.href = window.URL.createObjectURL(blob);
link.download = "PartFiles.zip";
link.click();
window.URL.revokeObjectURL(blob);
}
}
xmlhttp.send(JSON.stringify(parameters));
From what I read, Ajax is not the best for receiving byte arrays and binary data. With this method I was able to open one of the zip file with 7-zip, but not Windows, however, one of the files within the archive was showing as a size of 0KB and couldn't be opened. The other three files in the archive were fine. Other zip folders with different files could not be opened at all though.
After some time I found a post that was able to fix my issue, Create zip file from byte[]
From that post this is the revised method I'm using to create a zip folder with files in it.
public IActionResult DownloadPartFiles([FromBody] FileRequestParameters parameters)
{
List<InMemoryFile> files = new List<InMemoryFile>();
for (int i = 0; i < parameters.FileNames.Length; i++)
{
InMemoryFile inMemoryFile = GetInMemoryFile(parameters.FileLocations[i], parameters.FileNames[i]).Result;
files.Add(inMemoryFile);
}
byte[] archiveFile = null;
using (MemoryStream archiveStream = new MemoryStream())
{
using (ZipArchive archive = new ZipArchive(archiveStream, ZipArchiveMode.Create, true))
{
foreach (InMemoryFile file in files)
{
ZipArchiveEntry zipArchiveEntry = archive.CreateEntry(file.FileName, CompressionLevel.Optimal);
using (MemoryStream originalFileStream = new MemoryStream(file.Content))
using (Stream zipStream = zipArchiveEntry.Open())
{
originalFileStream.CopyTo(zipStream);
}
}
}
archiveFile = archiveStream.ToArray();
}
return File(archiveFile, "application/octet-stream");
}
I still don't know why the previous method was having issues so if anyone knows the answer to that in the future I'd love to know.
I know there are several threads about this topic, but I was not able to identify the problem in my case.
I have an application, where I upload an image to an endpoint-URL and after processing I'll receive a response. Works fine so far. The file is contained within a formdata object when using FileUploader-Control from SAPUI5.
When switching from file upload to "taking a picture with smartphone-camera", I dont have a file, I have an base64 dataurl (XString) image object.
var oImage = "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAABQAA…8ryQAbwUjsV5VUaAX/y+YSPJii2Z9GAAAAABJRU5ErkJggg=="} // some lines are missing > 1 million lines
I thought converting it to blob and appending it to FormData might be the solution, but it does not work at all.
var blob = this.toBlob(oImage)
console.log("Blob", blob); // --> Blob(857809) {size: 857809, type: "image/png"} size: 857809 type: "image/png" __proto__: Blob
var formData = new window.FormData();
formData.append("files", blob, "test.png");
console.log("FormData", formData); // seems empty --> FormData {}__proto__: FormData
Functions (works fine from my perspective)
toBlob: function dataURItoBlob(dataURI) {
var byteString = atob(dataURI.split(',')[1]);
var mimeString = dataURI.split(',')[0].split(':')[1].split(';')[0]
var ab = new ArrayBuffer(byteString.length);
var ia = new Uint8Array(ab);
for (var i = 0; i < byteString.length; i++) {
ia[i] = byteString.charCodeAt(i);
}
var bb = new Blob([ab], {
"type": mimeString
});
return bb;
},
This is my problem, FormData is empty and my POST-request throws an undefined error (Loading of data failed: TypeError: Cannot read property 'status' of undefined at constructor.eval (...m/resources/sap/ui/core/library-preload.js?eval:2183:566))
//Create JSON Model with URL
var oModel = new sap.ui.model.json.JSONModel();
var sHeaders = {
"content-type": "multipart/form-data; boundary=---011000010111000001101001",
"APIKey": "<<myKey>>"
};
var oData = {
formData
};
oModel.loadData("/my-destination/service", oData, true, "POST", null, false, sHeaders);
oModel.attachRequestCompleted(function (oEvent) {
var oData = oEvent.getSource().oData;
console.log("Final Response XHR: ", oData);
});
Thanks for any hint
The upload collection is a complex standard control that can be used for attachment management. On desktop it opens a file dialog, on mobile it opens the ios or android photo options, which means picking a photo from the camera roll, or taking a new photo.
Fairly basic example, including the upload URL's and other handlers you'll need. More options are available, adjust to suit your needs. In your XML:
<UploadCollection
uploadUrl="{path:'Key',formatter:'.headerUrl'}/Attachments"
items="{Attachments}"
change="onAttachUploadChange"
fileDeleted="onAttachDelete"
uploadEnabled="true"
uploadComplete="onAttachUploadComplete">
<UploadCollectionItem
documentId="{DocID}"
contributor="{CreatedBy}"
fileName="{ComponentName}"
fileSize="{path:'ComponentSize',formatter:'.formatter.parseFloat'}"
mimeType="{MIMEType}"
thumbnailUrl="{parts:[{path:'MIMEType'},{path:'DocID'}],formatter:'.thumbnailURL'}"
uploadedDate="{path:'CreatedAt', formatter:'.formatter.Date'}" url="{path:'DocID',formatter:'.attachmentURL'}" visibleEdit="false"
visibleDelete="true" />
</UploadCollection>
Here's the handlers. Especially the onAttachUploadChange is important. I should mention there's no explicit post. If the uploadUrl is set correctly a post is triggered anyway.
onAttachUploadChange: function(oEvent) {
var csrf = this.getModel().getSecurityToken();
var oUploader = oEvent.getSource();
var fileName = oEvent.getParameter('files')[0].name;
oUploader.removeAllHeaderParameters();
oUploader.insertHeaderParameter(new UploadCollectionParameter({
name: 'x-csrf-token',
value: csrf
}));
oUploader.insertHeaderParameter(new UploadCollectionParameter({
name: 'Slug',
value: fileName
}));
},
onAttachDelete: function(oEvent) {
var id = oEvent.getParameter('documentId');
var oModel = this.getModel();
//set busy indicator maybe?
oModel.remove(`/Attachments('${encodeURIComponent(id)}')`, {
success: (odata, response) => {
//successful removal
//oModel.refresh();
},
error: err => console.log(err)
});
},
onAttachUploadComplete: function(oEvent) {
var mParams = oEvent.getParameter('mParameters');
//handle errors an success in here. Check `mParams`.
}
as for the formatters to determine URLs, that depends on your setup. In the case below, the stream is set up on the current binding contect, in which case this is one way to do it. You'll need the whole uri so including the /sap/opu/... etc bits.
headerUrl: function() {
return this.getModel().sServiceUrl + this.getView().getBindingContext().getPath()
},
URL for attachments is similar, but generally points to an entity of the attachment service itself.
attachmentURL: function(docid) {
return this.getModel().sServiceUrl + "/Attachments('" + docid + "')/$value";
},
You could fancy it up to check if it's an image, in which case you could include the mime type to show a thumbnail.
There might be better ways of doing this, but I've found this fairly flexible...
I need to modify existing frontend (angular) code that involves uploading files to a server. Now the files need to be encrypted before being uploaded.
The current approach uses FormData to append a number of files and send them in a single request as shown below:
function uploadFiles(wrappers){
var data = new FormData();
// Add each file
for(var i = 0; i < wrappers.length; i++){
var wrapper = wrappers[i];
var file = wrapper.file;
data.append('file_' + i, file);
}
$http.post(uri, data, requestCfg).then(
/*...*
I have been using Forge in other projects, but never in this sort of context and don't really see how to encrypt files on the fly and still append them as FormData contents.
Forge provides an easy API:
var key = forge.random.getBytesSync(16);
var iv = forge.random.getBytesSync(8);
// encrypt some bytes
var cipher = forge.rc2.createEncryptionCipher(key);
cipher.start(iv);
cipher.update(forge.util.createBuffer(someBytes));
cipher.finish();
var encrypted = cipher.output;
The backend recieves files using Formidable and all the file hanlding is already wired. I would thus like to stick to using the existing front-end logic but simply insert the encryption logic. In that, it's not the entire formdata that must be encrypted... I haven't found a good lead yet to approach this.
Suggestions are very welcome!
Ok, found a solution and added the decrypt code as well. This adds a layer of async code.
function appendFile(aFile, idx){
// Encrypt if a key was provided for this protocol test
if(!key){
data.append('dicomfile_' + idx, file);
appendedCount++;
onFileAppended();
}
else{
var reader = new FileReader();
reader.onload = function(){
// 1. Read bytes
var arrayBuffer = reader.result;
var bytes = new Uint8Array(arrayBuffer); // byte array aka uint8
// 2. Encrypt
var cipher = forge.cipher.createCipher('AES-CBC', key);
cipher.start({iv: iv});
cipher.update(forge.util.createBuffer(bytes));
cipher.finish();
// 3. To blob (file extends blob)
var encryptedByteCharacters = cipher.output.getBytes(); // encryptedByteCharacters is similar to an ATOB(b64) output
// var asB64 = forge.util.encode64(encryptedBytes);
// var encryptedByteCharacters = atob(asB64);
// Convert to Blob object
var blob = byteCharsToBlob(encryptedByteCharacters, "application/octet-stream", 512);
// 4. Append blob
data.append('dicomfile_' + idx, blob, file.name);
// Decrypt for the sake of testing
if(true){
var fileReader = new FileReader();
fileReader.onload = function() {
arrayBuffer = this.result;
var bytez = new Uint8Array(arrayBuffer);
var decipher = forge.cipher.createDecipher('AES-CBC', key);
decipher.start({iv: iv});
decipher.update(forge.util.createBuffer(bytez));
decipher.finish();
var decryptedByteCharacters = decipher.output.getBytes();
var truz = bytes === decryptedByteCharacters;
var blob = byteCharsToBlob(decryptedByteCharacters, "application/octet-stream", 512);
data.append('decrypted_' + idx, blob, file.name + '.decrypted');
appendedCount++;
onFileAppended();
};
fileReader.readAsArrayBuffer(blob);
}
else{
// z. Resume processing
appendedCount++;
onFileAppended();
}
}
// Read file
reader.readAsArrayBuffer(aFile);
}
}
function onFileAppended(){
// Only proceed when all files were appended and optionally encrypted (async)
if(appendedCount !== wrappers.length) return;
/* resume processing, upload or do whathever */
I am using a plugin jsPDF which generates PDF and saves it to local file system. Now in jsPDF.js, there is some piece of code which generates pdf data in blob format as:-
var blob = new Blob([array], {type: "application/pdf"});
and further saves the blob data to local file system. Now instead of saving I need to print the PDF using plugin node-printer.
Here is some sample code to do so
var fs = require('fs'),
var dataToPrinter;
fs.readFile('/home/ubuntu/test.pdf', function(err, data){
dataToPrinter = data;
}
var printer = require("../lib");
printer.printDirect({
data: dataToPrinter,
printer:'Deskjet_3540',
type: 'PDF',
success: function(id) {
console.log('printed with id ' + id);
},
error: function(err) {
console.error('error on printing: ' + err);
}
})
The fs.readFile() reads the PDF file and generates data in raw buffer format.
Now what I want is to convert the 'Blob' data into 'raw buffer' so that I can print the PDF.
If you are not using NodeJS then you should know that the browser does not have a Buffer class implementation and you are probably compiling your code to browser-specific environment on something like browserify. In that case you need this library that converts your blob into a Buffer class that is supposed to be as perfectly equal to a NodeJS Buffer object as possible (the implementation is at feross/buffer).
If you are using node-fetch (not OP's case) then you probably got a blob from a response object:
const fetch = require("node-fetch");
const response = await fetch("http://www.stackoverflow.com/");
const blob = await response.blob();
This blob is an internal implementation and exists only inside node-fetch or fetch-blob libraries, to convert it to a native NodeJS Buffer object you need to transform it to an arrayBuffer first:
const arrayBuffer = await blob.arrayBuffer();
const buffer = Buffer.from(arrayBuffer);
This buffer object can then be used on things such as file writes and server responses.
For me, it worked with the following:
const buffer=Buffer.from(blob,'binary');
So, this buffer can be stored in Google Cloud Storage and local disk with fs node package.
I used blob file, to send data from client to server through ddp protocol (Meteor), so, when this file arrives to server I convert it to buffer in order to store it.
var blob = new Blob([array], {type: "application/pdf"});
var arrayBuffer, uint8Array;
var fileReader = new FileReader();
fileReader.onload = function() {
arrayBuffer = this.result;
uint8Array = new Uint8Array(arrayBuffer);
var printer = require("./js/controller/lib");
printer.printDirect({
data: uint8Array,
printer:'Deskjet_3540',
type: 'PDF',
success: function(id) {
console.log('printed with id ' + id);
},
error: function(err) {
console.error('error on printing: ' + err);
}
})
};
fileReader.readAsArrayBuffer(blob);
This is the final code which worked for me. The printer accepts uint8Array encoding format.
Try:
var blob = new Blob([array], {type: "application/pdf"});
var buffer = new Buffer(blob, "binary");
I want to convert excel sheet data to json. It has to be dynamic, so there is an upload button where user uploads the excel sheet and the data is then converted into json. Could you please provide me the javascript code? I tried SheetJS but couldn't figure out. I would prefer something straight forward :)
I really appreciate your help!
NOTE: Not 100% Cross Browser
Check browser compatibility # http://caniuse.com/#search=FileReader
as you will see people have had issues with the not so common browsers, But this could come down to the version of the browser.. I always recommend using something like caniuse to see what generation of browser is supported... This is only a working answer for the user, not a final copy and paste code for people to just use..
The Fiddle: http://jsfiddle.net/d2atnbrt/3/
THE HTML CODE:
<input type="file" id="my_file_input" />
<div id='my_file_output'></div>
THE JS CODE:
var oFileIn;
$(function() {
oFileIn = document.getElementById('my_file_input');
if(oFileIn.addEventListener) {
oFileIn.addEventListener('change', filePicked, false);
}
});
function filePicked(oEvent) {
// Get The File From The Input
var oFile = oEvent.target.files[0];
var sFilename = oFile.name;
// Create A File Reader HTML5
var reader = new FileReader();
// Ready The Event For When A File Gets Selected
reader.onload = function(e) {
var data = e.target.result;
var cfb = XLS.CFB.read(data, {type: 'binary'});
var wb = XLS.parse_xlscfb(cfb);
// Loop Over Each Sheet
wb.SheetNames.forEach(function(sheetName) {
// Obtain The Current Row As CSV
var sCSV = XLS.utils.make_csv(wb.Sheets[sheetName]);
var oJS = XLS.utils.sheet_to_row_object_array(wb.Sheets[sheetName]);
$("#my_file_output").html(sCSV);
console.log(oJS)
});
};
// Tell JS To Start Reading The File.. You could delay this if desired
reader.readAsBinaryString(oFile);
}
This also requires https://cdnjs.cloudflare.com/ajax/libs/xls/0.7.4-a/xls.js to convert to a readable format, i've also used jquery only for changing the div contents and for the dom ready event.. so jquery is not needed
This is as basic as i could get it,
EDIT - Generating A Table
The Fiddle: http://jsfiddle.net/d2atnbrt/5/
This second fiddle shows an example of generating your own table, the key here is using sheet_to_json to get the data in the correct format for JS use..
One or two comments in the second fiddle might be incorrect as modified version of the first fiddle.. the CSV comment is at least
Test XLS File: http://www.whitehouse.gov/sites/default/files/omb/budget/fy2014/assets/receipts.xls
This does not cover XLSX files thought, it should be fairly easy to adjust for them using their examples.
js-xlsx library makes it easy to convert Excel/CSV files into JSON objects.
Download the xlsx.full.min.js file from here.
Write below code on your HTML page
Edit the referenced js file link (xlsx.full.min.js) and link of Excel file
<!doctype html>
<html>
<head>
<title>Excel to JSON Demo</title>
<script src="xlsx.full.min.js"></script>
</head>
<body>
<script>
/* set up XMLHttpRequest */
var url = "http://myclassbook.org/wp-content/uploads/2017/12/Test.xlsx";
var oReq = new XMLHttpRequest();
oReq.open("GET", url, true);
oReq.responseType = "arraybuffer";
oReq.onload = function(e) {
var arraybuffer = oReq.response;
/* convert data to binary string */
var data = new Uint8Array(arraybuffer);
var arr = new Array();
for (var i = 0; i != data.length; ++i) arr[i] = String.fromCharCode(data[i]);
var bstr = arr.join("");
/* Call XLSX */
var workbook = XLSX.read(bstr, {
type: "binary"
});
/* DO SOMETHING WITH workbook HERE */
var first_sheet_name = workbook.SheetNames[0];
/* Get worksheet */
var worksheet = workbook.Sheets[first_sheet_name];
console.log(XLSX.utils.sheet_to_json(worksheet, {
raw: true
}));
}
oReq.send();
</script>
</body>
</html>
Input:
Output:
The answers are working fine with xls format but, in my case, it didn't work for xlsx format. Thus I added some code here. it works both xls and xlsx format.
I took the sample from the official sample link.
Hope it may help !
function fileReader(oEvent) {
var oFile = oEvent.target.files[0];
var sFilename = oFile.name;
var reader = new FileReader();
var result = {};
reader.onload = function (e) {
var data = e.target.result;
data = new Uint8Array(data);
var workbook = XLSX.read(data, {type: 'array'});
console.log(workbook);
var result = {};
workbook.SheetNames.forEach(function (sheetName) {
var roa = XLSX.utils.sheet_to_json(workbook.Sheets[sheetName], {header: 1});
if (roa.length) result[sheetName] = roa;
});
// see the result, caution: it works after reader event is done.
console.log(result);
};
reader.readAsArrayBuffer(oFile);
}
// Add your id of "File Input"
$('#fileUpload').change(function(ev) {
// Do something
fileReader(ev);
}
#Kwang-Chun Kang Thanks Kang a lot! I found the solution is working and very helpful, it really save my day.
For me I am trying to create a React.js component that convert *.xlsx to json object when user upload the excel file to a html input tag.
First I need to install XLSX package with:
npm install xlsx --save
Then in my component code, import with:
import XLSX from 'xlsx'
The component UI should look like this:
<input
accept=".xlsx"
type="file"
onChange={this.fileReader}
/>
It calls a function fileReader(), which is exactly same as the solution provided.
To learn more about fileReader API, I found this blog to be helpful:
https://blog.teamtreehouse.com/reading-files-using-the-html5-filereader-api
This is my expansion on https://stackoverflow.com/a/52237535/5079799
While it was working/great example, I'm not using an input form, but fetching from a URL and I have other things to do after fething workbook so I needed to wrap the onload into a promise.
See --> adjust onload function to be used with async/await
Here is what I ended up w/
async function Outside_Test(){
var reso = await Get_JSON()
console.log('reso_out')
console.log(reso)
}
async function Get_JSON() {
var url = "http://MyworkbookURL"
var workbook = await Get_XLSX_As_Workbook_From_URL(url)
/* DO SOMETHING WITH workbook HERE */
var first_sheet_name = workbook.SheetNames[0];
/* Get worksheet */
var worksheet = workbook.Sheets[first_sheet_name];
var reso = (XLSX.utils.sheet_to_json(worksheet, {
raw: true
}));
return reso
}
async function Get_XLSX_As_Workbook_From_URL(url) {
const arrayBuffer = await new Promise((resolve, reject) => {
var oReq = new XMLHttpRequest();
oReq.open("GET", url, true);
oReq.responseType = "arraybuffer";
oReq.onload = () => resolve(oReq.response);
oReq.onerror = reject;
oReq.send();
});
var data = new Uint8Array(arrayBuffer);
var arr = new Array();
for (var i = 0; i != data.length; ++i) arr[i] = String.fromCharCode(data[i]);
var bstr = arr.join("");
var workbook = XLSX.read(bstr, {
type: "binary"
});
return workbook
}