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Questions tagged [xmlhttprequest-level2]

XMLHttpRequest Level 2 defines various new methods over XMLHttRequest level 1, such as the FormData object and new response types.

XMLHttpRequest level 2 adds new functionality over level 1, including:

See also

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Why does my http://localhost CORS origin not work?

I am stuck with this CORS problem, even though I set the server (nginx/node.js) with the appropriate headers. I can see in Chrome Network pane -> Response Headers: Access-Control-Allow-Origin:http://localhost which should do the trick. Here's the…
whadar
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ArrayBuffer vs Blob and XHR2

XHR2 differences states The ability to transfer ArrayBuffer, Blob, File and FormData objects. What are the differences between ArrayBuffer and Blob ? Why should I care about being able to send them over XHR2 ? (I can understand value of File and…
Raynos
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Chrome extension: how to pass ArrayBuffer or Blob from content script to the background without losing its type?

I have this content script that downloads some binary data using XHR, which is sent later to the background script: var self = this; var xhr = new XMLHttpRequest(); xhr.open('GET', url); xhr.responseType = 'arraybuffer'; xhr.onload = function(e) { …
Michael Spector
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CORS request is preflighted, but it seems like it should not be

The following cross-origin POST request, with a content-type of multipart/form-data and only simple headers is preflighted. According to the W3C spec, unless I am reading it wrong, it should not be preflighted. I've confirmed this happens in…
Ray Nicholus
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Uploading a file with XMLHttprequest - Missing boundary in multipart/form-data

I'm uploading a file with XMLHttprequest. Here is the JS function, that uploads a file: var upload = function(file) { // Create form data var formData = new FormData(); formData.append('file', file); var xhr = new…
Tamás Pap
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Is it possible to set accept-charset for new FormData (XHR2) object or workaround

Here is example code (http://jsfiddle.net/epsSZ/1/): HTML:
Dfr
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xhr.upload.onprogress doesn't work

Everything in the following code will work, except it will never fire the xhr.upload.onprogress event. $(function(){ var xhr; $("#submit").click(function(){ var formData = new FormData(); formData.append("myFile",…
user1534664
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XMLHttpRequest.addEventListener vs XMLHttpRequest.upload.addEventListener

What is the difference between the this code block: var xhr = new XMLHttpRequest(); xhr.upload.addEventListener("progress", uploadProgress, false); xhr.addEventListener("load", uploadComplete, false); xhr.addEventListener("error", uploadFailed,…
DMac the Destroyer
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Unable to post to a new action method via .Ajax right after a successful XMLHttpRequest in IE 10

I am adding a new feature in my app which lets users to complete a process in steps. Step1 select dropdown value hit next button and step 2 (ajax request loads and renders a partial view, rendering a tree view) hit next button step 3 (upload a file…
tam tam
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iOS 6 (iPhone/iPad) Image Upload "Request Body Stream Exhausted" with NTLM/Windows Authentication

I am working on trying to get iOS 6 to use XMLHttpRequest POSTs to upload images. This works on desktop and Android web browsers, but with iOS 6 I am getting an error on the page being posted to: "Request Body Stream Exhausted". (Using iOS…
John Chapman
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XMLHttpRequest 2 download progress event only firing once

I'm trying to get the progress of an ajax request via the following code: var xhr = new XMLHttpRequest(); xhr.addEventListener('progress', function(event) { console.log(event.loaded / event.total); }, false); xhr.addEventListener('load',…
DADU
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JS ProgressEvent is only fired when finished

I am having some problems getting my upload progress bar to work properly. According to the XMLHttpRequest Level 2 specs, I attached event listeners for loadstart and progress like this: var xhr =…
Leo Selig
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No XMLHttpRequest 2 progress in Android stock browser

I have a working file upload form that uses XMLHttpRequest 2 to upload files to Transloadit (a file processing service). The progress events get fired correctly in Firefox and Chrome, both for Desktop and for Android. But the Android (4.0) stock…
Hernan S.
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How can I cap the download speed of XHR2 in javascript

I have implemented a "downloader" using XMLHTTPRequest, which I use to download files and parts of files using javascript. For testing and maybe also for real-world scenarios, I would like to limit the bandwidth this downloader takes. One option I…
whadar
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How to compare two blobs in JavaScript?

I load two blob files in JavaScript using the code below. I want to compare them to see if they are precisely the same. (blob1 === blob2) is returning false, even though the reported size of each blob is 574 bytes. What am I doing wrong? …
Duke Dougal
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