AWS S3：我应该使用 POST 还是 PUT 请求来上传文件？

Question

I would like to know the pros and cons of using POST or PUT request to upload a file to Amazon Web Services S3.

I've already read some SO question like this one , but I would like to know the specific differences when using the AWS API.

I managed to use both, but hardly see the difference. I am using both PUT and POST via AJAX and the XMLHTTPRequest object, to upload directly from the browser with a node.js backend generating the signature.

The difference I noticed is that I can't restrict content-type and length server-side with PUT when I generate the signature, but this could be because I am just learning it now.

Answer 1

TO upload an object to an Amazon S3 bucket from an application, you should use the AWS SDK in a given programming language. For example, if you are building an app using JavaScript, you can use the AWS SDK for JavaScript and use its client to upload an object.

Uploading photos to Amazon S3 from a browser

Likewise, if you are building a Spring BOOT app, then use the AWS SDK for Java V2 to upload an object. An example is shown here:

Creating an example AWS photo analyzer application using the AWS SDK for Java

Answer 2

Apart from the differences you noticed, when using POST, the response you get contains The object key name. This is useful if you upload multiple objects in parallel, to identify which upload succeeded or not in the callback.

Also for access control, you can use POST and PUT differently (eg Not allowing object modification, while only allowing creation)