To download Google Docs, Sheets, and Slides use files.export instead. It provides features like easy script installation, automatic update I will show you, how to read CSV file data from an uploaded CSV file. ; user, password login and password for basic HTTP auth (if required). For example, if an extension contains a JSON configuration file called config.json, in a config_resources folder, the extension can retrieve the file's contents like this: var xhr = new XMLHttpRequest (); XMLHttpRequest.send() HTTP XMLHttpRequest.send() GET HEAD null Covering popular subjects like HTML, CSS, JavaScript, Python, SQL, Java, and many, many more. I will show you, how to read CSV file data from an uploaded CSV file. Examples of both common and more obscure use cases for XMLHttpRequest are included.. To send an HTTP request, create an XMLHttpRequest object, open a URL, and send the request. XMLHttpRequest Fetch ; PHPPython Node Refer to the input element documentation for information on available values.. when uploading Files and Blobs to the server), do not explicitly set the Content-Type header on the request. Please note, this example is using a GET request, which besides getting the headers (all you need to check weather the file exists) gets the whole file. The XMLHttpRequest object can be used to exchange data with a server behind the scenes. XMLHttpRequest send ArrayBufferBlob File POST Tampermonkey is a free browser extension and the most popular userscript manager. Using the input element, you can select your file. As many people mentioned before, this doesn't work using an AJAX call. Latest version: 1.8.0, last published: 7 years ago. After the transaction completes, the object will For example, if an extension contains a JSON configuration file called config.json, in a config_resources folder, the extension can retrieve the file's contents like this: var xhr = new XMLHttpRequest (); Please note, this example is using a GET request, which besides getting the headers (all you need to check weather the file exists) gets the whole file. I tried this solution. If the file is big enough this method can take a while to complete. Doing so will prevent the browser from being able to set the Content-Type header with the boundary expression it will use to delimit Your particular case is showing how it is implemented for XMLHttpRequest (and you'll get identical results if you were to use fetch), but it also applies to other things (such as images loaded onto a