Upload a file to specific folderid using REST Api - google-api

Question

I've searched all documents in google drive api and I can't able to find how to upload a file to folderid using REST APi. Can anyone please help me on this?
public void UploadFiletoDrive()
{
var gmodel = GetAccessToken();
WebRequest request = WebRequest.Create("https://www.googleapis.com/upload/drive/v3/files/?uploadType=media");
request.Method = "POST";
request.Headers["Authorization"] = "Bearer " + gmodel.access_token;
request.ContentType = "image/jpeg";
Stream dataStream = request.GetRequestStream();
FileStream filestream = new FileStream(#"C:\Users\Developer\Downloads\unnamed (2).jpg", FileMode.Open, FileAccess.Read);
byte[] buffer = new byte[4096];
int bytesRead = 0;
while ((bytesRead = filestream.Read(buffer, 0, buffer.Length)) != 0)
{
dataStream.Write(buffer, 0, bytesRead);
}
filestream.Close();
dataStream.Close();
WebResponse response = request.GetResponse();
StreamReader reader = new StreamReader(response.GetResponseStream());
string responseFromServer = reader.ReadToEnd();
reader.Close();
response.Close();
}

Answer 1

It seems you've missed the Work with Folders docs.
Inserting a file in a folder using Java:
String folderId = "0BwwA4oUTeiV1TGRPeTVjaWRDY1E";
File fileMetadata = new File();
fileMetadata.setName("photo.jpg");
fileMetadata.setParents(Collections.singletonList(folderId));
java.io.File filePath = new java.io.File("files/photo.jpg");
FileContent mediaContent = new FileContent("image/jpeg", filePath);
File file = driveService.files().create(fileMetadata, mediaContent)
.setFields("id, parents")
.execute();
System.out.println("File ID: " + file.getId());
Implementation for other languages are also included like PHP, Python, NodeJS.
Also, check this SO thread for additional reference.
body.setParents(Arrays.asList(new ParentReference().setId(folderId)));

Answer 2

Your sample code is doing a media upload, ie. no metadata, You should be using a multipart upload so you can specify both metadata such as parent folder id and content.

Answer 3

Uploading a file to google drive using REST API has following steps.
Get parent folderID using list API
Create file with parent="folder ID" using create api and get "fileId" in response
upload file to "fileId
Following is javascript code to upload file using REST API
const url = 'https://www.googleapis.com/upload/drive/v3/files/' + fileId + '?uploadType=media';
if(self.fetch){
// console.log("Fetch found, Using fetch");
var setHeaders = new Headers();
setHeaders.append('Authorization', 'Bearer ' + authToken.access_token);
setHeaders.append('Content-Type', mime);
var setOptions = {
method: 'PATCH',
headers: setHeaders,
body: blob
};
fetch(url,setOptions)
.then(response => { if(response.ok){
// console.log("save to google using fetch");
}
else{
// console.log("Response wast not ok");
}
})
.catch(error => {
// console.log("There is an error " + error.message);
});
}