XMLHttpRequest post image to S3

postImgToS3.js

  
      const url = "https://2r5x7bfm7h.execute-api.us-west-2.amazonaws.com/v1/upload";
      const xhr = new XMLHttpRequest();

      if ("withCredentials" in xhr){
          xhr.open("POST", url, true);
      } else if (typeof XDomainRequest != "undefined"){
          xhr = new XDomainRequest();
          xhr.open("POST", url);
      } else {
          xhr = null;
      }
      let self = this;
      // xhr.setRequestHeader('Content-type', "application/x-amz-json-1.1");
      xhr.setRequestHeader('Content-type', 'application/json');
      xhr.onreadystatechange = function() {
        // In local files, status is 0 upon success in Mozilla Firefox
        if(xhr.readyState === XMLHttpRequest.DONE) {
          var status = xhr.status;
          if (status === 0 || (status >= 200 && status < 400)) {
            // The request has been completed successfully
            console.log("Upload done. " + xhr.responseText);

            self.setState({
              s3ImageUrl: xhr.responseText
            });
            { self.state.s3ImageUrl !== '' ? self.classifyImage() : '' };

          } else {
            console.log("Upload photo error.");
          }
        }
      };
      xhr.send(JSON.stringify({
        "Image": this.state.base64String,
        "name": "testImage.jpg"
      }));