sugarcrm fileDownload error after upgrade

Question

I received this error after I upgraded sugar7.8, Which calling my filedownload.

{"error":"need_login","error_message":"No valid authentication for user."}

After some Investigation found tht sugar upgraded the API calls for OAuth. Following is my CODE:

 api.fileDownload(api.buildURL("Quotes/" + model.get("id") + "/pdf/download?OAuth-Token=" + api.getOAuthToken()), {        success: function() {            app.alert.show("pdf_download_api_success", {                level: "success",                messages: SUGAR.language.get('Quotes', 'LBL_QUOTE_PDF_GENERATED'),                autoClose: true            });        },});

I checked the detials in the Following url: But I could not able to add headder to the HTTPS request can some one help?

https://developer.sugarcrm.com/2016/11/15/security-changes-coming-in-sugar-7-8/

Aravind Kumar · Accepted Answer

After so much research, I came up with a solution for this issue.

Note: There is no supporting document for `api.fileDownload(` to use `OAuth-token`.

So i tried using `XMLHttpRequest` and it worked fine.

**SOLUTION**

var request = new XMLHttpRequest();
request.open('GET', api.buildURL("YOURMODULE/" + model.get("id") + "/pdf/download"), true);
request.setRequestHeader('OAuth-Token', api.getOAuthToken()); // UR TOKEN
request.responseType = "blob";
request.onload = function (e) {
if (this.status === 200) {
      // `blob` response
      // create `objectURL` of `this.response` : `.pdf` as `Blob`
      var file = window.URL.createObjectURL(this.response);
      var a = document.createElement("a");
      a.href = file;
      /*request.onreadystatechange = function() {
            if(this.readyState == this.HEADERS_RECEIVED) {
                  console.log(request.getResponseHeader("Content-Type"));
            }
      }*/

      a.download = request.getResponseHeader("FileName");
      document.body.appendChild(a);
      a.click();
      document.body.removeChild(a);
   };
};
request.send();