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I'm trying to upload a file with the Google Drive api, and I have the metadata correct, and I want to ensure that the actual file contents make it there. I have a simple page setup that looks like this:

<div id="upload"> <h6>File Upload Operations</h6> <input type="file" placeholder='file' name='fileToUpload'> <button id='uploadFile'>Upload File</button> </div>

and I have a the javascript setup where the user is prompted to sign in first, and then they can upload a file. Here's the code: (currently only uploads the file metadata....)

let uploadButton = document.getElementById('uploadFile'); uploadButton.onclick = uploadFile; const uploadFile = () => { let ftu = document.getElementsByName('fileToUpload')[0].files[0]; console.dir(ftu); gapi.client.drive.files.create({ 'content-type': 'application/json;charset=utf-8', uploadType: 'multipart', name: ftu.name, mimeType: ftu.type, fields: 'id, name, kind' }).then(response => { console.dir(response); console.log(`File: ${ftu.name} with MimeType of: ${ftu.type}`); //Need code to upload the file contents...... }); };

First, I'm more familiar with the back end, so getting the file in bits from the <input type='file'> tag is a bit nebulous for me. On the bright side, the metadata is there. How can I get the file contents up to the api?

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3 Answers 3

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5

So According to some resources I've found in my three day search to get this going, the file simply cannot be uploaded via the gapi client. It must be uploaded through a true REST HTTP call. So let's use fetch!

const uploadFile = () => { //initialize file data from the dom let ftu = document.getElementsByName('fileToUpload')[0].files[0]; let file = new Blob([ftu]); //this is to ensure the file is in a format that can be understood by the API gapi.client.drive.files.create({ 'content-type': 'application/json', uploadType: 'multipart', name: ftu.name, mimeType: ftu.type, fields: 'id, name, kind, size' }).then(apiResponse => { fetch(`https://www.googleapis.com/upload/drive/v3/files/${response.result.id}`, { method: 'PATCH', headers: new Headers({ 'Authorization': `Bearer ${gapi.client.getToken().access_token}`, 'Content-Type': ftu.type }), body: file }).then(res => console.log(res)); }

The Authorization Header is assigned from calling the gapi.client.getToken().access_token function, and basically this takes the empty object from the response on the gapi call and calls the fetch api to upload the actual bits of the file!

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1 Comment

I tried and "size" is not returned... does it return filesize for you?
2

In your situation, when you upload a file using gapi.client.drive.files.create(), the empty file which has the uploaded metadata is created. If my understanding is correct, how about this workaround? I have experienced the same situation with you. At that time, I used this workaround.

Modification points:

  • Retrieve access token using gapi.
  • File is uploaded using XMLHttpRequest.

Modified script:

Please modify the script in uploadFile().

let ftu = document.getElementsByName('fileToUpload')[0].files[0]; var metadata = { 'name': ftu.name, 'mimeType': ftu.type, }; var accessToken = gapi.auth.getToken().access_token; // Here gapi is used for retrieving the access token. var form = new FormData(); form.append('metadata', new Blob([JSON.stringify(metadata)], {type: 'application/json'})); form.append('file', ftu); var xhr = new XMLHttpRequest(); xhr.open('post', 'https://www.googleapis.com/upload/drive/v3/files?uploadType=multipart&fields=id,name,kind'); xhr.setRequestHeader('Authorization', 'Bearer ' + accessToken); xhr.responseType = 'json'; xhr.onload = () => { console.log(xhr.response); }; xhr.send(form);

Note:

  • In this modified script, it supposes that Drive API is enabled at API console and the access token can be used for uploading file.
  • About fields, you are using id,name,kind. So this sample also uses them.

Reference:

If I misunderstand your question or this workaround was not useful for your situation, I'm sorry.

Edit:

When you want to use fetch, how about this sample script?

let ftu = document.getElementsByName('fileToUpload')[0].files[0]; var metadata = { 'name': ftu.name, 'mimeType': ftu.type, }; var accessToken = gapi.auth.getToken().access_token; // Here gapi is used for retrieving the access token. var form = new FormData(); form.append('metadata', new Blob([JSON.stringify(metadata)], {type: 'application/json'})); form.append('file', ftu); fetch('https://www.googleapis.com/upload/drive/v3/files?uploadType=multipart&fields=id,name,kind', { method: 'POST', headers: new Headers({'Authorization': 'Bearer ' + accessToken}), body: form }).then((res) => { return res.json(); }).then(function(val) { console.log(val); });
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5 Comments

Thanks, I settled on something similar. I'll post as an answer.
@Chris Rutherford Thank you for replying. If my answer was not useful for your situation, I apologize.
it's not that it isn't useful, I just feel like using fetch might be a better option going forward. XHR is old, and prone to errors if not used properly. Fetch is the new standard. that's all. Thanks @tanaike
@Chris Rutherford Thank you for replying. I could understand it. I'm sorry for my poor skill.
@Chris Rutherford I added a sample script using fetch. Could you please confirm it? In your script, Drive API is used 2 times when a file is uploaded. This script can upload file by one API call. If this was helpful for your situation, I'm glad.
0

With https://www.npmjs.com/package/@types/gapi.client.drive

const makeUploadUrl = (fileId: string, params: Record<string, boolean>) => { const uploadUrl = new URL( `https://www.googleapis.com/upload/drive/v3/files/${fileId}` ) Object.entries({ ...params, uploadType: 'media', }).map(([key, value]) => uploadUrl.searchParams.append(key, `${value}`)) return uploadUrl } const uploadDriveFile = async ({ file }: { file: File }) => { const params = { enforceSingleParent: true, supportsAllDrives: true, } // create file handle const { result } = await gapi.client.drive.files.create(params, { // CAN'T have the upload type here! name: file.name, mimeType: file.type, // any resource params you need... driveId: process.env.DRIVE_ID, parents: [process.env.FOLDER_ID], }) // post the file data await fetch(makeUploadUrl(result.id!, params), { method: 'PATCH', headers: new Headers({ Authorization: `Bearer ${gapi.client.getToken().access_token}`, 'Content-Type': file.type, }), body: file, }) return result }) }
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