# presign ## Description Generate a pre-signed URL for an Amazon S3 object. This allows anyone who receives the pre-signed URL to retrieve the S3 object with an HTTP GET request. All presigned URL’s now use sigv4 so the region needs to be configured explicitly. ## Synopsis ``` presign [--expires-in ] [--debug] [--endpoint-url ] [--no-verify-ssl] [--no-paginate] [--output ] [--query ] [--profile ] [--region ] [--version ] [--color ] [--no-sign-request] [--ca-bundle ] [--cli-read-timeout ] [--cli-connect-timeout ] [--cli-binary-format ] [--no-cli-pager] [--cli-auto-prompt] [--no-cli-auto-prompt] [--cli-error-format ] ``` ## Options `path` (string) `--expires-in` (integer) Number of seconds until the pre-signed URL expires. Default is 3600 seconds. Maximum is 604800 seconds. ## Global Options `--debug` (boolean) Turn on debug logging. `--endpoint-url` (string) Override command’s default URL with the given URL. `--no-verify-ssl` (boolean) By default, the AWS CLI uses SSL when communicating with AWS services. For each SSL connection, the AWS CLI will verify SSL certificates. This option overrides the default behavior of verifying SSL certificates. `--no-paginate` (boolean) Disable automatic pagination. If automatic pagination is disabled, the AWS CLI will only make one call, for the first page of results. `--output` (string) The formatting style for command output. * json * text * table * yaml * yaml-stream * off `--query` (string) A JMESPath query to use in filtering the response data. `--profile` (string) Use a specific profile from your credential file. `--region` (string) The region to use. Overrides config/env settings. `--version` (string) Display the version of this tool. `--color` (string) Turn on/off color output. * on * off * auto `--no-sign-request` (boolean) Do not sign requests. Credentials will not be loaded if this argument is provided. `--ca-bundle` (string) The CA certificate bundle to use when verifying SSL certificates. Overrides config/env settings. `--cli-read-timeout` (int) The maximum socket read time in seconds. If the value is set to 0, the socket read will be blocking and not timeout. The default value is 60 seconds. `--cli-connect-timeout` (int) The maximum socket connect time in seconds. If the value is set to 0, the socket connect will be blocking and not timeout. The default value is 60 seconds. `--cli-binary-format` (string) The formatting style to be used for binary blobs. The default format is base64. The base64 format expects binary blobs to be provided as a base64 encoded string. The raw-in-base64-out format preserves compatibility with AWS CLI V1 behavior and binary values must be passed literally. When providing contents from a file that map to a binary blob `fileb://` will always be treated as binary and use the file contents directly regardless of the `cli-binary-format` setting. When using `file://` the file contents will need to properly formatted for the configured `cli-binary-format`. * base64 * raw-in-base64-out `--no-cli-pager` (boolean) Disable cli pager for output. `--cli-auto-prompt` (boolean) Automatically prompt for CLI input parameters. `--no-cli-auto-prompt` (boolean) Disable automatically prompt for CLI input parameters. `--cli-error-format` (string) The formatting style for error output. By default, errors are displayed in enhanced format. * legacy * json * yaml * text * table * enhanced ## Examples #### NOTE To use the following examples, you must have the AWS CLI installed and configured. See the [Getting started guide](https://docs.aws.amazon.com/cli/latest/userguide/cli-chap-getting-started.html) in the *AWS CLI User Guide* for more information. Unless otherwise stated, all examples have unix-like quotation rules. These examples will need to be adapted to your terminal’s quoting rules. See [Using quotation marks with strings](https://docs.aws.amazon.com/cli/latest/userguide/cli-usage-parameters-quoting-strings.html) in the *AWS CLI User Guide* . **Example 1: To create a pre-signed URL with the default one hour lifetime that links to an object in an S3 bucket** The following `presign` example generates a pre-signed URL for a specified bucket and key that is valid for one hour. ```bash aws s3 presign s3://amzn-s3-demo-bucket/test2.txt ``` Output: ``` https://amzn-s3-demo-bucket.s3.us-west-2.amazonaws.com/key?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=AKIAEXAMPLE123456789%2F20210621%2Fus-west-2%2Fs3%2Faws4_request&X-Amz-Date=20210621T041609Z&X-Amz-Expires=3600&X-Amz-SignedHeaders=host&X-Amz-Signature=EXAMPLE1234494d5fba3fed607f98018e1dfc62e2529ae96d844123456 ``` **Example 2: To create a pre-signed URL with a custom lifetime that links to an object in an S3 bucket** The following `presign` example generates a pre-signed URL for a specified bucket and key that is valid for one week. ```bash aws s3 presign s3://amzn-s3-demo-bucket/test2.txt \ --expires-in 604800 ``` Output: ``` https://amzn-s3-demo-bucket.s3.us-west-2.amazonaws.com/key?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=AKIAEXAMPLE123456789%2F20210621%2Fus-west-2%2Fs3%2Faws4_request&X-Amz-Date=20210621T041609Z&X-Amz-Expires=604800&X-Amz-SignedHeaders=host&X-Amz-Signature=EXAMPLE1234494d5fba3fed607f98018e1dfc62e2529ae96d844123456 ``` For more information, see [Share an Object with Others](https://docs.aws.amazon.com/AmazonS3/latest/dev/ShareObjectPreSignedURL.html) in the *Amazon S3 Developer Guide*.