How is an OPTIONS request sent?-Object Storage Service(OSS)-阿里云帮助中心

Usage notes

Before a cross-origin request is sent, the browser sends a preflight (OPTIONS) request that includes a specific origin, HTTP method, and header information to Object Storage Service (OSS) to determine whether to send the cross-origin request. The browser automatically determines whether to send the preflight request based on whether the actual request is a cross-origin request.
The browser automatically determines whether to send the preflight request based on whether the actual request is a cross-origin request.

ossutil api option-object --bucket value --key value [flags]

Parameter	Type	Description
--access-control-request-headers	string	The custom headers to be sent in the actual cross-origin request.
--access-control-request-method	string	The method to be used in the actual cross-origin request.
--bucket	string	The name of the bucket.
--key	string	The full path of the object.
--origin	string	The origin of the request. It is used to identify a cross-origin request.

Note

For more information about supported global command-line options, see Global command-line options.
The option-object command corresponds to the Options operation. For more information about the parameters in the Options operation, see Options.

Run the following command to send an OPTIONS request to the example.txt object in the examplebucket bucket:
```
ossutil api option-object --bucket examplebucket --key example.txt
```
Run the following command to send an OPTIONS request whose origin is www.example.com to the example.txt object in the examplebucket bucket:
```
ossutil api option-object --bucket examplebucket --key example.txt --origin www.example.com
```
Run the following command to send an OPTIONS request which allows PUT requests to the example.txt object in the examplebucket bucket:
```
ossutil api option-object --bucket examplebucket --key example.txt --access-control-request-method PUT
```
Run the following command to send an OPTIONS request which contains the x-oss-test1 request header to the example.txt object in the examplebucket bucket:
```
ossutil api option-object --bucket examplebucket --key example.txt --access-control-request-headers x-oss-test1
```