Utilize Angular 2 to upload and access files directly on the client side

Question

Utilize Angular 2 to upload and access files directly on the client side

How can I obtain log file(s) from a user so that I can analyze them? Is there a way to create a drop area where the user can upload a file, and then I can read it using JavaScript?

I am currently using Angular2 rc5 and have node.js running on the backend, but I do not need the data processed there. I specifically need it to be accessible at the client side.

Is it feasible to read and parse file content solely using frontend technologies such as Angular2 and JavaScript, or must the file be uploaded to a server for analysis?

javascript angular typescript client-side

Answer 1

Answer №1

Yes, it is definitely possible!

This is the method I used to achieve this task. By reading all the files selected through the file dialog, I was able to manipulate them directly on the client side without the need to send them to node.js.

<input type='file' accept='text/plain' multiple (change)='openFile($event)'>

openFile(event) {
    let input = event.target;
    for (var index = 0; index < input.files.length; index++) {
        let reader = new FileReader();
        reader.onload = () => {
            // 'text' contains the content of the file
            var text = reader.result;
        }
        reader.readAsText(input.files[index]);
    };
}

This example showcases a simple way to accomplish the task.

Answer 2

Yes, it is definitely possible!

This is the method I used to achieve this task. By reading all the files selected through the file dialog, I was able to manipulate them directly on the client side without the need to send them to node.js.

<input type='file' accept='text/plain' multiple (change)='openFile($event)'>

openFile(event) {
    let input = event.target;
    for (var index = 0; index < input.files.length; index++) {
        let reader = new FileReader();
        reader.onload = () => {
            // 'text' contains the content of the file
            var text = reader.result;
        }
        reader.readAsText(input.files[index]);
    };
}

This example showcases a simple way to accomplish the task.

Utilize Angular 2 to upload and access files directly on the client side

Answer №1

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