I am trying to use the XLSX library to read data from excelsheet but I am getting this:-
ERROR: _fs is undefined at xlsx.js (line 11388, col 59)
Here is my code :-
<html>
<head>
<title>Read Excel</title>
<meta meta http-equiv="Content-Type" content="text/html;" charset="UTF-8"/>
</head>
<body>
<script src="xlsx.js"></script>
<script>
function actionbegins(){
console.log("Inside the function action begins !!");
if(typeof XLSX === 'undefined' && typeof require !== 'undefined')
XLSX = require('xlsx');
var workbook = XLSX.readFile("Invoice.xlsx", {type: 'base64'});
var first_sheet_name = workbook.SheetNames[0];
var address_of_cell = 'A2';
var worksheet = workbook.Sheets[first_sheet_name];
var desired_cell = worksheet[address_of_cell];
var desired_value = desired_cell.v;
console.log("we got the value as --> "+desired_value);
}
</script>
<button id="btnDoIt" onclick="actionbegins()" name="btnDoIt" class="btn btn-primary">do It !!</button>
</body>
</html>
I tried searching the net for a suitable answer but could not find any. Please suggest.
It was not working because the file wasn't loaded completely and it started processing it.
Here is the code that is working absolutely fine :
<html>
<head>
<title>Read Excel</title>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<script lang="javascript" src="dist/xlsx.core.min.js"></script>
</head>
<body>
<script>
function letsdoit(){
var url = "Invoice.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("");
var workbook = XLSX.read(bstr, {type:"binary"});
var first_sheet_name = workbook.SheetNames[0];
var address_of_cell = 'A1';
var worksheet = workbook.Sheets[first_sheet_name];
var desired_cell = worksheet[address_of_cell];
var desired_value = desired_cell.v;
alert("value is -- "+desired_value);
}
oReq.send();
}
</script>
<input type="file" name="file" id="selectfile" onchange="letsdoit()" />
</body>
</html>
Related
My goal is to display a pdf from a blob Url. I want to add a tag to the html code <iframe src='${blobUrl}' type="application/pdf"></iframe> to display the pdf file. Here is the full code :
html
{% load static %}
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
</head>
<body>
{{ encodedstring | json_script:'mydata' }}
<div class="pdfdisplay"></div>
<script>
function b64toBlob(b64Data, contentType, sliceSize) {
contentType = contentType || '';
sliceSize = sliceSize || 512;
var byteCharacters = atob(b64Data);
var byteArrays = [];
for (var offset = 0; offset < byteCharacters.length; offset += sliceSize) {
var slice = byteCharacters.slice(offset, offset + sliceSize);
var byteNumbers = new Array(slice.length);
for (var i = 0; i < slice.length; i++) {
byteNumbers[i] = slice.charCodeAt(i);
}
var byteArray = new Uint8Array(byteNumbers);
byteArrays.push(byteArray);
}
var blob = new Blob(byteArrays, {type: contentType});
return blob;
}
var contentType = 'application/pdf';
var b64Data = JSON.parse(document.getElementById('mydata').textContent);
var blob = b64toBlob(b64Data, contentType);
var blobUrl = URL.createObjectURL(blob);
const target = document.querySelector('div.pdfdisplay');
target.innerHTML = <iframe src='${blobUrl}' type="application/pdf"></iframe>;
</script>
</body>
</html>
When I inspect the page generated, nothing is added to <div class="pdfdisplay"></div>
and the page is blank. I know that the error comes from ther queryselector but I do not see what is wrong.
Thanks
i've found this code on a website for uploading files using javascript, but it doesn't seems to work. Could somebody help me with that please?
Index.php :
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css">
<link href="style.css" rel="stylesheet" type="text/css"/>
</head>
<body>
<div class="container">
<div class="row">
<div id="uploads"></div>
<div class="dropzone" id="dropzone">
Drop files fere to upload
</div>
</div>
</div>
<script src="js_script.js" type="text/javascript"></script>
</body>
</html>
And js :
(function() {
var dropzone = document.getElementById('dropzone');
var displayUploads = function(data) {
var uploads = document.getElementById('uploads'),
anchor,
x;
for (x = 0; x < data.length; x = x + 1) {
anchor = document.createElement('a');
anchor.href = data[x].file;
anchor.innerText = data[x].name;
uploads.appendChild(anchor);
}
};
var upload = function(files) {
var formData = new FormData(),
xhr = new XMLHttpRequest(),
x;
for (x = 0; x < files.length; x = x + 1) {
formData.append('file[]', files[x]);
}
xhr.onload = function() {
var data = JSON.parse(this.responseText);
displayUploads(data);
};
xhr.open('post', 'upload.php');
xhr.send(formData);
};
dropzone.ondrop = function(e) {
e.preventDefault();
this.className = 'dropzone';
upload(e.dataTransfer.files);
};
dropzone.ondragover = function() {
this.className = 'dropzone dragover';
return false;
};
dropzone.ondragleave = function() {
this.className = 'dropzone';
return false;
};
}());
and upload.php :
<?php
header("Content-Type: application/json");
$uploaded = array();
if(!empty($_FILES['file']['name'][0])){
foreach($_FILES['file']['name'] as $position => $name){
if(move_uploaded_file($_FILES['file']['tmp_name'][$position], 'uploads/'.$name)){
$uploaded[] = array(
'name' => $name,
'file' => 'uploads/'.$name
);
}
}
}
echo json_encode($uploaded);
?>
And now this issue :
GET .../upload.php 404 (Not Found)
and related code to issue :
xhr.send(formData);
btw what is that "GET" showing in console??
I just saved the file "Upload.php" with uppercase "U" which should be "upload.php".
i want try multiload xls files and view values in SheetJS but work only last in array url.
<!doctype html>
<html>
<head>
<title>Excel to JSON Demo</title>
<script src="https://cdnjs.cloudflare.com/ajax/libs/xlsx/0.10.7/xlsx.full.min.js"></script>
</head>
<body>
<script>
/* set up XMLHttpRequest */
var url = new Array();
url.push("2017_01_Zole.xls");
url.push("2017_03_TK.xls");
url.push("2017_05_Psy.xls");
for(var z = 0; z<url.length; z++){
var oReq = new XMLHttpRequest();
oReq.open("GET", url[z], 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];
// jsn = XLSX.utils.sheet_to_json(worksheet,{raw:true});
console.log(worksheet['F3'].v +' = '+ worksheet['J3'].v);
};
oReq.send();
}
</script>
</body>
</html>
After each loop I want to display the result in console.log. Unfortunately, it only shows me data from the last file.
Moved solution from question to answer:
EDIT:
Problem solved
var x = 0;
function xlsy(urls){
var oReq = new XMLHttpRequest();
oReq.open("GET", urls, true);
//.......
oReq.send();
x++;
if(x < url.length){
xlsy(url[x])
}
}
xlsy(url[0]);
I have read some of the previous questions on this topic but I really need to be 100% sure!
Is it possible to read from a .txt file on my local system and present it in my HTML-BODY?
I have tried several functions, here is one:
function readFile (path) {
var fso = new ActiveXObject('Scripting.FileSystemObject'),
iStream=fso.OpenTextFile(path, 1, false);
while(!iStream.AtEndOfStream) {
document.body.innerHTML += iStream.ReadLine() + '<br/>';
}
iStream.Close();
}
readFile("testing.txt");
The content of the file is simply around 100 words I want to read from the text file and display in my HTML-BODY.
Is this possible without having my own server?
You can use a FileReader object to read text file here is example code:
<div id="page-wrapper">
<h1>Text File Reader</h1>
<div>
Select a text file:
<input type="file" id="fileInput">
</div>
<pre id="fileDisplayArea"><pre>
</div>
<script>
window.onload = function() {
var fileInput = document.getElementById('fileInput');
var fileDisplayArea = document.getElementById('fileDisplayArea');
fileInput.addEventListener('change', function(e) {
var file = fileInput.files[0];
var textType = /text.*/;
if (file.type.match(textType)) {
var reader = new FileReader();
reader.onload = function(e) {
fileDisplayArea.innerText = reader.result;
}
reader.readAsText(file);
} else {
fileDisplayArea.innerText = "File not supported!"
}
});
}
</script>
Here is the codepen demo
If you have a fixed file to read every time your application load then you can use this code :
<script>
var fileDisplayArea = document.getElementById('fileDisplayArea');
function readTextFile(file)
{
var rawFile = new XMLHttpRequest();
rawFile.open("GET", file, false);
rawFile.onreadystatechange = function ()
{
if(rawFile.readyState === 4)
{
if(rawFile.status === 200 || rawFile.status == 0)
{
var allText = rawFile.responseText;
fileDisplayArea.innerText = allText
}
}
}
rawFile.send(null);
}
readTextFile("file:///C:/your/path/to/file.txt");
</script>
Please find below the code that generates automatically the content of the txt local file and display it html. Good luck!
<html>
<head>
<meta charset="utf-8">
<script type="text/javascript">
var x;
if(navigator.appName.search('Microsoft')>-1) { x = new ActiveXObject('MSXML2.XMLHTTP'); }
else { x = new XMLHttpRequest(); }
function getdata() {
x.open('get', 'data1.txt', true);
x.onreadystatechange= showdata;
x.send(null);
}
function showdata() {
if(x.readyState==4) {
var el = document.getElementById('content');
el.innerHTML = x.responseText;
}
}
</script>
</head>
<body onload="getdata();showdata();">
<div id="content"></div>
</body>
</html>
I have an HTML application to search Facebook pages using pure JavaScript, no other libraries and no back-end.Most of the APIs that deal with searching and reading "pages" do not require user authorization, and they support JSONP (through the "callback" parameter).
My HTML code, index.html
<!doctype html>
<head>
<title>FaceBook Page Search API</title>
<script type="text/javascript" src='js/app.js'></script>
<link rel="stylesheet" type="text/css" href="css/bootstrap.css">
<link rel="stylesheet" type="text/css" href="css/style.css">
</head>
<body>
<div class="container">
<div class="form-search">
<h3>Search FaceBook Pages</h3>
<p class="form-search-row"><input id="searchPages" type="text" placeholder="Enter name">
<button class="btn btn-medium btn-success" onclick="getData()" type="submit">Search</button>
</p>
</div>
</div>
<div class="offset1 pull-center page-results">
</div>
</body>
</html>
and app.js,
var getData = function(){
var my_JSON_object = {};
var http_request = new XMLHttpRequest();
var str, queryInput = document.getElementById("searchPages");
var searchFormRow = document.getElementsByClassName('form-search-row')[0];
var image=document.createElement('img');
if(!queryInput.value){
return;
}
str = encodeURIComponent(queryInput.value);
image.setAttribute('src', 'img/ajax-loader.gif');
image.setAttribute('width', '30px');
searchFormRow.appendChild(image);
var url = "https://graph.facebook.com/search?type=page&q="+ str;
http_request.open("GET", url, true);
http_request.onreadystatechange = function () {
var done = 4, ok = 200;
if (http_request.readyState == done && http_request.status == ok) {
my_JSON_object = JSON.parse(http_request.responseText);
displayResults(my_JSON_object);
image.parentNode.removeChild(image);
}
};
http_request.send(null);
};
var displayResults = function(pages){
var resultDiv = document.getElementsByClassName('page-results')[0];
if(pages.data.length){
resultDiv.innerHTML = "";
}
else{
resultDiv.innerHTML = "No results found";
}
for(var i=0; i<pages.data.length; i++)
{
var name = pages.data[i].name, category = pages.data[i].category, id= pages.data[i].id;
var page = document.createElement("div");
var pname = document.createElement("p");
var findmore = document.createElement("a");
var pcategory = document.createElement("p");
pname.innerHTML = name;
findmore.innerHTML = " find out more";
findmore.href= "detail.html?id="+id;
findmore.target = "_blank";
pname.appendChild(findmore);
pcategory.innerHTML = "Category: " + category;
pcategory.setAttribute('class',"small-font");
page.setAttribute('class','span2 pageDiv');
page.appendChild(pname);
page.appendChild(pcategory);
resultDiv.appendChild(page);
console.log(pages.data[i].name);
}
};
var getPageDeatil = function(){
var query = window.location.search.substring(1);
var vars = query.split("=");
getDetailsAjax(vars[1]);
};
var getDetailsAjax = function(pageId){
var my_JSON_object = {};
var http_request = new XMLHttpRequest();
var str = encodeURIComponent(pageId);
var url = "https://graph.facebook.com/"+ str;
http_request.open("GET", url, true);
http_request.onreadystatechange = function () {
var done = 4, ok = 200;
if (http_request.readyState == done && http_request.status == ok) {
my_JSON_object = JSON.parse(http_request.responseText);
displayDetailsResult(my_JSON_object);
}
};
http_request.send(null);
};
var displayDetailsResult = function(detail){
var resultDiv = document.getElementById('details');
var displayImage;
for (key in detail) {
if (detail.hasOwnProperty(key)) {
if(key=="cover"){
displayImage =true;
}
else{
var li = document.createElement("li");
li.setAttribute('class',"removeDecor");
li.innerHTML = key+ " : " + detail[key];
resultDiv.appendChild(li);
}
}
}
if(displayImage){
var heading = document.getElementById('header');
var image = document.createElement('img');
image.setAttribute('src', detail.cover.source);
heading.insertBefore(image);
}
};
Finally, the detail.html
<!doctype html>
<head>
<title>FaceBook Page Search API - Detail Page</title>
<script type="text/javascript" src='js/app.js'></script>
<link rel="stylesheet" type="text/css" href="css/bootstrap.css">
<link rel="stylesheet" type="text/css" href="css/style.css">
</head>
<body onload="getPageDeatil()">
<div class="container">
<h3 id="header">More about Page</h3>
<div class="well">
<ul id="details">
</ul>
</div>
</div>
</body>
</html>
But it gives the following error in console.
{
"error": {
"message": "(#200) Must have a valid access_token to access this endpoint",
"type": "OAuthException",
"code": 200
}
}
Page search API do not require authorization right ? Then how can I solve this ?
Thanks for all, finally solved my problem by referring Facebook Developer Documentation.
First, got details about access_token here, https://developers.facebook.com/docs/reference/api/search/#access_tokens
Searches across page and place objects requires an app access token.
Each application should be registered in https://developers.facebook.com/apps to get an app_id and secret_id.
After getting this details,
Generate access_token using this URL https://graph.facebook.com/oauth/access_token?client_id=app_id&client_secret=secret_id&grant_type=client_credentials
The app_id and secret_id should be changed with generated one.
And changed my request URL in app.js file like this,
var access_token = ""; // my access token here
var url = "https://graph.facebook.com/search?type=page&q="+ str +"&access_token="+access_token;