Axios onUploadProgress only fires once on my machine

问题

If I use this fiddle https://jsfiddle.net/v70kou59/1/ everything works as expected

(function () {
    var output = document.getElementById('output');
    document.getElementById('upload').onclick = function () {
      var data = new FormData();
      data.append('foo', 'bar');
      data.append('file', document.getElementById('file').files[0]);
      var config = {
        onUploadProgress: function(progressEvent) {
          var percentCompleted = Math.round( (progressEvent.loaded * 100) / progressEvent.total );
          console.log(percentCompleted)
        }
      };
      axios.put('/upload/server', data, config)
        .then(function (res) {
          output.className = 'container';
          output.innerHTML = res.data;
        })
        .catch(function (err) {
          output.className = 'container text-danger';
          output.innerHTML = err.message;
        });
    };
  })();

But if I download the axios examples repo and install the necessary dependencies the callback function, onUploadProgress no longer works as expected. It only fires onUploadProgress once with "100". https://github.com/axios/axios/tree/master/examples

Could this be my version of node? It seems like it must be my machine.

回答1:

Because the new version changed.

So you have to call progress instead of onUploadProgress

 static uploadImageFile(authId, userinfo, file, callback) {
        let url = AppConfig.domain + '/api/CoreUploads/uploadImg';
        let formData = new FormData();
        formData.append('realm', userinfo.realm);
        formData.append('fileurl', `users/${userinfo.id}/`);
        formData.append('cropData', "");
        formData.append('autoid', true);
        formData.append('image', file);

        return axios.post(url, formData, {
            timeout: 1000000,
            withCredentials: true,
            headers: {
                'Authorization': authId,
                'Content-type': 'multipart/form-data'
            },
            progress: function (progressEvent) {
                let percentCompleted = Math.round((progressEvent.loaded * 100) / progressEvent.total);
                callback(percentCompleted);
            }
        }).catch(e => {
            console.log(e);

        });
    }

来源：https://stackoverflow.com/questions/46780129/axios-onuploadprogress-only-fires-once-on-my-machine