Use a POST object request to:

- [Initiate a resumable upload](https://docs.cloud.google.com/storage/docs/xml-api/post-object-resumable.md.txt)
- [Initiate a multipart upload](https://docs.cloud.google.com/storage/docs/xml-api/post-object-multipart.md.txt)
- [Complete a multipart upload](https://docs.cloud.google.com/storage/docs/xml-api/post-object-complete.md.txt)
- [Upload an object using an HTML form](https://docs.cloud.google.com/storage/docs/xml-api/post-object-forms.md.txt)

For simple uploads with the XML API, you make a [`PUT` Object](https://docs.cloud.google.com/storage/docs/xml-api/put-object.md.txt) request
instead of using `POST` Object.