Google picker selected file callback

问题

i have integrated and try to use the google picker api google picker api but can i turn the callback into file ? so i can upload the file to my server

function pickerCallback(data) { 
  if (data.action == google.picker.Action.PICKED) {
    var fileId = data.docs[0].id; alert('The user selected: ' + fileId); 
  } 
} 

---

回答1:

Once you have the fileId, you can download the file as explained in the documentation for Download files with the Drive API

Unfortunately, there is no sample for Browser Javascript, but you use e.g. XML HttpRequests.

Sample:

//provided you already have the following line from previous steps:
oauthToken = authResult.access_token;

var doc = data[google.picker.Response.DOCUMENTS][0];
var mimeType = doc[google.picker.Document.MIME_TYPE];

var xhr = new XMLHttpRequest();
xhr.open("GET", "https://www.googleapis.com/drive/v3/files/"+fileId+'?alt=media', true);
xhr.setRequestHeader('Authorization','Bearer '+oauthToken);
xhr.responseType = 'arraybuffer'
xhr.onload = function(){
    var base64 = 'data:' + mimeType + ';base64,' + base64ArrayBuffer(xhr.response);
//now you have the file content as binary data (ArrayBuffer) - proceed as desired
}
xhr.send();

Note:

you can modify xhr.responseType to e.g. blob or another responseType depending on your situation.

Alternatively you could also perform a Fetch request to 'https://www.googleapis.com/drive/v3/files' to obtain the file blob.

来源：https://stackoverflow.com/questions/64043752/google-picker-selected-file-callback