How to implement HTTP's beforeSend option

dsiebes · December 8, 2015, 5:48pm

I’m using HTTP.call to download large files on for the client on occasion, and I’d like to show the progress to the user. I’ve implemented beforeSend, however, it simply does not execute the function. I’ve tried to more or less follow the structure used in Meteor’s test file short of not finding examples elsewhere:

github.com

meteor/meteor/blob/f0fbe353d74eca696e5d0f941572ec1c2197e1f3/packages/http/httpcall_tests.js#L457


    expect(function (error, result) {
      test.isFalse(error);
      test.isTrue(result);
      test.equal(result.statusCode, 200);
      test.instanceOf(result.content, Buffer);
    })
  );
}
]);


Meteor.isClient && testAsyncMulti("httpcall - beforeSend", [
function (test, expect) {
  var fired = false;
  var bSend = function(xhr){
    test.isFalse(fired);
    fired = true;
    test.isTrue(xhr instanceof XMLHttpRequest);
  };


  HTTP.get(url_prefix() + "/", {beforeSend: bSend}, expect(function () {
    test.isTrue(fired);

Here is my implementation that does not work:

httpProgress = function(xhr) {
    console.log('I never see this');
    xhr.onprogress = function() {
        if (e.lengthComputable) {
            setProgress((e.loaded / e.total) * 100, 'downloading...', true);
        }
        else{
            setProgress(-1, 'downloading...', true);
        }
    };
};
HTTP.call('GET',url, {
        beforeSend: httpProgress,
        headers: {
            'Accept': '*/*'
        },
        responseType: 'arraybuffer' //using aldeed:http here
    }, function(error, result) { 
      ...
    }
);

The http.call is executed fine, but my beforeSend function never runs. I’m stumped, any ideas? Thank you everyone.

dsiebes · December 9, 2015, 4:16pm

In case anybody visits this with the same issue, as of this time aldeed:http does not support beforeSend. I’ve filed an issue on the package’s respective github repository.