Read blob URL content

read_blob_url_content.js

// Read blob url like this one: 
// blob:http://localhost:8080/611963a8-1e5a-4de3-9fa2-3fa39a82a2a2
// This blob url come from URL.createObjectURL(File);

function turn_blob_to_file(blob_url) {
    var xhr = new XMLHttpRequest();
    xhr.responseType = "blob";
    
    xhr.onload = function() {
      var blob = xhr.response;
      var file = new File([blob], "a.ass", { type: "plain/text" });
      //
      // Done. write more code here. For example:
      //
      var reader = new FileReader();
      reader.onload = function() {
        var text = reader.result;
        console.log(text);
      };
      reader.readAsText(file, "UTF-8");
    };
    
    xhr.open("GET", blob_url);
    xhr.send();
},