I use XMLHttpRequest to send POST data to nodejs (expressjs api). The size of file about 200mb. When I do, Chrome crashes, but the Firefox doesn't. Does Chrome have a limited file size?
And how can I upload the large file via JavaScript?
This is my code send xhr request:
// create http request API AI Engine
var xhr = new XMLHttpRequest();
xhr.open('POST', url, true);
xhr.responseType = 'arraybuffer';
xhr.timeout = 3600000;
xhr.onload = function() {
// reponse measage
if (this.status === 200) {
var errorArea = document.getElementById('error-area');
errorArea.style.display = 'none';
zip.files = {};
// unzip File
zip.loadAsync(this.response)
.then(function(zip) {
// will be called, even if content is corrupted
for (const file in zip.files) {
if (zip.files.hasOwnProperty(file)) {
const fileObject = zip.files[file];
fileObject.async('arraybuffer').then(function(fileData) {
var fileSave = new Blob([new Uint8Array(
fileData)]);
// Save file
saveAs(fileSave, fileObject.name);
})
}
}
}, function(e) {
var errorArea = document.getElementById('error-area');
errorArea.style.display = 'block';
errorArea.innerHTML =
'<strong>Error</strong> Cant not unzip file return.';
});
// get response stream data
} else {
var errorArea = document.getElementById('error-area');
errorArea.style.display = 'block';
errorArea.innerHTML =
'<strong>Error</strong> Cant not analyze file: ' + this.statusText;
}
};
// Handle when have error with xhr, show message
xhr.onerror = function(err) {
var errorArea = document.getElementById('error-area');
errorArea.style.display = 'block';
errorArea.innerHTML =
'<strong>Error</strong> Cant not analyze file: ' + this.statusText;
};
// Handle when have timeout with xhr, show message
xhr.ontimeout = function() {
var errorArea = document.getElementById('error-area');
errorArea.style.display = 'block';
errorArea.innerHTML =
'<strong>Error</strong> Cant not analyze file: Request time out';
};
// Add custom header
xhr.setRequestHeader('Content-type', 'application/octet-stream');
xhr.setRequestHeader('file-name', Date.now().toString() + '.zip');
xhr.setRequestHeader('file-length', data.byteLength);
// Send arraybuffer to server
xhr.send(data);
});
Related
I'm trying to connect by hand to Colyseus. I am trying now with node but I don't understand why I can't get past the first message.
Here is the code:
var WebSocket = require('ws');
var XMLHttpRequest = require('xhr2');
var xhr = new XMLHttpRequest()
var myurl = "http://localhost:2567/matchmake/joinOrCreate/my_room"
var res = '';
var socket = '';
let data = `{ "Id": 123}`;
xhr.open("POST", myurl);
xhr.setRequestHeader("Accept", "application/json");
xhr.setRequestHeader("Content-Type", "application/json");
xhr.onreadystatechange = function () {
if (xhr.readyState === 4) {
console.log(xhr.status);
console.log(xhr.responseText);
res = JSON.parse(xhr.responseText);
var processId = res['room']['processId'];
var roomId = res['room']['roomId'];
var sessionId = res['sessionId'];
var wsurl = "ws://localhost:2567/"+processId+"/"+roomId+"?sessionId="+sessionId;
socket = new WebSocket(wsurl);
socket.onmessage = (event) => {
console.log('Message from server ', event.data);
};
}
};
xhr.send(data);
I can see the first message, but when I "broadcast" a message by changing something on the server state, nothing appears. If I connect with the official library, I do see messages going back and forth.
Am I missing something?
Hello Developers,
I'm trying to download the list of files getting form XMLHttpRequest() request method and store it in the array of files. I wanted to zip all the files in an array using javascript without using any 3rd party library.
I have tried to achieve this by URL.createObjectURL(url) and URL.revokeObjectURL(url) method but the file I'm getting is corrupted.
I'm Sharing my code snippet please help me out
const URLS = [
'https://vr.josh.earth/assets/2dimages/saturnv.jpg',
'https://vr.josh.earth/assets/360images/hotel_small.jpg',
'https://vr.josh.earth/assets/360images/redwoods.jpg'
];
$(document).ready(function () {
debugger
$("#downloadAll").click(function () {
var blob = new Array();
var files = new Array();
URLS.forEach(function (url, i) {
getRawData(url, function (err, data) {
debugger
var mydata = data;
// mydata = btoa(encodeURIComponent(data));
// var blobData = b64toBlob(mydata , 'image/jpg');
var blobData = new Blob([mydata], { type: 'image/jpg' });
blob.push(blobData);
var filename = "testFiles" + i + ".jpg";
var file = blobToFile(blobData, filename);
files.push(file);
debugger
if (files.length == URLS.length) {
// saveData(blob, "fileName.zip");
var AllBlobData = new Blob([blob], { type: 'application/zip' });
saveData(AllBlobData, "Test.zip");
// saveFile("DownloadFiles.zip", "application/zip", files)
}
});
});
});
});
//Retriving record using XMLHttpRequest() method.
function getRawData(urlPath, callback, progress) {
var request = new XMLHttpRequest();
request.open("GET", urlPath, true);
request.setRequestHeader('Accept', '');
if ('responseType' in request)
request.responseType = "arraybuffer"
if (request.overrideMimeType)
request.overrideMimeType('text/plain; charset=x-user-defined');
request.send();
var file, err;
request.onreadystatechange = function () {
if (this.readyState === 4) {
request.onreadystatechange = null;
if (this.status === 200) {
try {
debugger
var file = request.response || request.responseText;
} catch (error) {
throw error;
}
callback(err, file);
} else {
debugger
callback(new Error("Ajax Error!!"))
}
} else {
debugger
}
}
}
//For Saving the file into zip
var saveData = (function () {
var a = document.createElement("a");
document.body.appendChild(a);
a.style = "display: none";
return function (data, fileName) {
// var AllBlobs = new Blob([data], { type: "" });//application/zip //octet/stream
// var url = window.URL.createObjectURL(AllBlobs);
var url = window.URL.createObjectURL(data);
a.href = url;
a.download = fileName;
a.click();
window.URL.revokeObjectURL(url);
};
}());
//Downloaded Zip File
enter image description here
I am writing an extension to download videos from a website. That web site has mp4 files and m3u8 files. I have already implemented the part to download direct mp4 files. I stuck at converting the m3u8 file to mp4. I tried lot of js packages but there are a lot of dependencies and failed even after using browserfy.
Current popup.js file
function loadvideoList(callback){
chrome.storage.sync.get(['courseID'], function(result) {
if(result.courseID != 'undefined'){
$.ajax({
type: 'GET',
url: "http://localhost:80/get_videos_list/"+result.courseID,
crossDomain: true,
success: function(response) {
document.getElementById("loading_icon").style.display='none';
document.getElementById("videos_list").style.display='block';
document.getElementById("videos_list").style.padding='10px';
for(var i = 0; i < response.video_list.length; i++){
if(response.video_list[i].type == 'mp4'){
handleDownloadButton(response.video_list[i]);
}else{
// ************ HERE ***************
handleDownloadButton-m3u8Tomp4(response.video_list[i].video_url)
}
}
},
error: function (err) {
alert("unexpected error occured: "+err.code);
console.log(err);
}
});
}else{
document.getElementById("videos_list").style.display='none';
document.getElementById("videos_list").style.padding='0';
}
});
}
function handleDownloadButton(json_vid){
var node = document.createElement("DIV");
// node.style.marginBottom = "5px"
var t = document.createElement('p');
t.textContent = json_vid.file_name;
t.style.width ="240px";
node.appendChild(t);
node.style.padding = "5px";
var downloadBtn = document.createElement("BUTTON");
downloadBtn.style.cssFloat = "right";
downloadBtn.className = "btn btn-primary btn-sm download_btn";
downloadBtn.innerHTML = "Download";
// downloadBtn.value = json_vid.video_url;
node.appendChild(downloadBtn);
downloadBtn.id = json_vid.video_id;
document.getElementById("videos_list").appendChild(node);
var progress_bar = document.createElement("DIV");
progress_bar.className = "progress_container";
node.appendChild(progress_bar);
var moving_bar = document.createElement("DIV");
moving_bar.className = "progress_bar";
progress_bar.appendChild(moving_bar);
moving_bar.id = json_vid.video_id+"bar";
$(function(){
$(`#${json_vid.video_id}`).click(function(){
$(`#${json_vid.video_id}`).attr("disabled", true);
// alert(json_vid.video_url);
var that = this;
var page_url = json_vid.video_url;
var req = new XMLHttpRequest();
req.open("GET", page_url, true);
// req.withCredentials = true;
req.addEventListener("progress", function (evt) {
if(evt.lengthComputable) {
var percentComplete = evt.loaded / evt.total;
// document.getElementById("download_stat").innerHTML = percentComplete;
// console.log(percentComplete);
document.getElementById(json_vid.video_id+"bar").style.width = `${percentComplete*100}%`;
document.getElementById(json_vid.video_id).textContent = `${(percentComplete*100).toFixed(2)}%`;
}
}, false);
req.responseType = "blob";
req.onreadystatechange = function () {
if (req.readyState === 4 && req.status === 200) {
var filename = $(that).data('filename');
if (typeof window.chrome !== 'undefined') {
// Chrome version
$(`#${json_vid.video_id}`).attr("disabled", false);
$(`#${json_vid.video_id}`).attr("onclick", "").unbind("click");
document.getElementById(json_vid.video_id).textContent = 'Save';
$(function(){
$(`#${json_vid.video_id}`).click(function(){
// alert("download is ready");
var link = document.createElement('a');
// link.text = "download is ready";
// document.getElementById("videos_list").appendChild(link);
link.href = window.URL.createObjectURL(req.response);
link.download = json_vid.file_name;
link.click();
});
});
} else if (typeof window.navigator.msSaveBlob !== 'undefined') {
// IE version
var blob = new Blob([req.response], { type: 'application/force-download' });
window.navigator.msSaveBlob(blob, filename);
} else {
// Firefox version
var file = new File([req.response], filename, { type: 'application/force-download' });
window.open(URL.createObjectURL(file));
}
}
};
req.send();
});
});
}
handleDownloadButton function create the button to download the direct mp4 files. I need to implement a similar function called handleDownloadButton-m3u8Tomp4(see the code sample) that should first convert the http://...file.m3u8 to a mp4 and make it also downloadable. I seek for a script in similar repos like https://github.com/puemos/hls-downloader-chrome-extension, but I was unable to do so. It would be great, If anyone could help me, Thanks in advance!
You can try to use ffmpeg.wasm to convert the .m3u8 file to a .mp4 file. ffmpeg.wasm is a pure WebAssembly / JavaScript port of FFmpeg. They even have an example repository for a Chrome extension. I haven't tested it myself though.
There are other questions here on StackOverflow that deal with how to convert a m3u8 file with FFmpeg, like this one for example.
I'm trying to get a MediaStream object into a blob, but I have some problems.
This is the part of my script for the UserMedia component:
var mediastream = undefined;
var blob = undefined;
var video = document.getElementById('test');
This is my script where I'm trying my test:
var mediastream = undefined;
var blobUrl = undefined;
var video = document.getElementById('test');
function successCallback (stream) {
mediastream = stream;
blobUrl = URL.createObjectURL(mediastream);
var xhr = new XMLHttpRequest();
xhr.open('GET', blobUrl, true);
xhr.responseType = 'arraybuffer';
xhr.withCredentials = true;
xhr.onreadystatechange = function () {
console.log('xhr.readyState='+xhr.readyState);
if (xhr.readyState !== 4) {
return;
} else {
var myBlob = this.response;
}
function errorCallback (stream) {
console.log('error');
}
Setting the blobUrl to the video.src I don't have any problem:
video.src = blobUrl; <- WORKS
But if I call the urlBob url (like this one: blob:http%3A//localhost%3A8080/b1ffa5b7-c0cc-4acf-8890-f5d0f08de9cb ) I obtain HTTP status 404.
For sure there is something wrong on my implementation.
Any suggestions?
Thank you!
I have written the following code for download file from Google drive using JavaScript but I am not able to open file after completion of download its giving error like file format does not match my code as below,
function createPicker() {
var picker = new FilePicker({
apiKey: 'myapikey',
clientId: 'myclientID',
buttonEl: document.getElementById('ancggdgdgdd'),
onSelect: function (file) {
downloadFile(file);
}
});
}
and to read the content of file code as:
function downloadFile(doc) {
var myToken = gapi.auth.getToken();
var contentType = "text/plain;charset=utf-8";
var rawFile = new XMLHttpRequest();
rawFile.open("GET", doc.downloadUrl, false);
rawFile.setRequestHeader('Content-type', contentType)
rawFile.setRequestHeader('Authorization', 'Bearer ' + myToken.access_token);
rawFile.onreadystatechange = function () {
if (rawFile.readyState === 4) {
if (rawFile.status === 200 || rawFile.status == 0) {
sendFile(rawFile.responseText);//here I am sending httpcontext
}
}
}
//rawFile.responseType = "arraybuffer";
rawFile.send(null);
}
Try this function for downloading the files:
/**
* Download a file's content.
*
* #param {File} file Drive File instance.
* #param {Function} callback Function to call when the request is complete.
*/
function downloadFile(file, callback) {
if (file.downloadUrl) {
var accessToken = gapi.auth.getToken().access_token;
var xhr = new XMLHttpRequest();
xhr.open('GET', file.downloadUrl);
xhr.setRequestHeader('Authorization', 'Bearer ' + accessToken);
xhr.onload = function() {
callback(xhr.responseText);
};
xhr.onerror = function() {
callback(null);
};
xhr.send();
} else {
callback(null);
}
}
You can find more information in the following link: https://developers.google.com/drive/web/manage-downloads