S3Connector

Accesses the Amazon Simple Storage Service (S3) file storage service to upload, download, or delete files and folders or list file/folder information from an S3 account.

Jump to Configuration

Typical Uses

Manage datasets on S3 by uploading, downloading, and deleting files and folders
Transfer a file's contents (such as XML or raster) into or out of an attribute in FME
Read downloaded S3 data using the FeatureReader, or upload data written by the FeatureWriter to S3
Retrieve file and folder names, paths, links and other information from S3 to use elsewhere in a workspace.

How does it work?

The S3Connector uses your Amazon S3 account credentials (either via a previously defined FME web connection, or by setting up a new FME web connection right from the transformer) to access the file storage service.

Depending on your choice of actions, it will upload or download files, folders, and attributes; list information from the service; or delete items from the service. On uploads, link attributes can be added to the output features. On List actions, file/folder information are added as attributes.

Usage Notes

This transformer cannot be used to directly move or copy files between different S3 locations. However, multiple S3Connectors can be used to move or copy files with an intermediate download.
The FeatureReader can access S3 directly, without using the S3Connector. In this case, a local copy of the dataset will not be created.

Configuration

Input Ports

Output Ports

Parameters

Authentication

Credential Source	The S3Connector can use credentials from different sources. Using a web connection integrates best with FME, but in some cases, you may wish to use one of the other sources. Anonymous - access public S3 buckets without authenticating Web Connection - use an Amazon Web Services web connection stored in the FME web connections database Embedded - embed an access key ID and secret access key as parameters in the transformer System - use credentials already configured on the system. This allows for using IAM role-based authentication. For more information about configuring AWS credentials system-wide, see https://docs.aws.amazon.com/cli/latest/userguide/cli-chap-getting-started.html#config-settings-and-precedence
Account	Available when the credential source is Web Connection. To create an S3 connection, click the 'Account' drop-down box and select 'Add Web Connection...'. The connection can then be managed via Tools -> FME Options... -> Web Connections.
Region	The AWS Region in which the specified Bucket resides. If the default value, US East, N. Virginia (us-east-1), is specified, and the specified Bucket does not reside there, the operation will still succeed. However, to optimize latency, it is best practice to specify the correct region.
Alternate Endpoint	If specified, use an alternate S3-compatible API. These are typically object storage services from providers other than AWS, or on-premises solutions.
Verify HTTPS Certificates	Yes (default): ensure that HTTPS certificates are signed by a trusted authority No: do not check the authenticity of HTTPS certificates. Note that the connection is still encrypted, but another party can more easily intercept the transmitted data. This is not recommended.
AWS CA Bundle	The AWS CA Bundle specifies the path to a certificate bundle to use for certificate validation. If set, this has precedence over the value of the AWS_CA_BUNDLE environment variable.
Requester Pays	Some public buckets require the requester to pay the cost of operations performed. Setting this parameter to Yes will allow AWS to charge the account associated with the provided credentials to be charged.
Access Key ID and Secret Access Key	Available when the credential source is Embedded. An access key ID and secret access key can be specified directly in the transformer instead of in a web connection.
Session Token	Optional. Available when the credential source is Embedded. If specified, use the temporary security credentials to connect to S3.

The remaining parameters available depend on the value of the Request > Action parameter. Parameters for each Action are detailed below.

Parameters - Download Action

Download Options

Bucket

The bucket the file or folder is in. If valid credentials have been provided as a web connection, you may browse for a bucket.

Path

The full path of a file or folder on S3 to download. If valid credentials have been provided as a web connection, you may browse for a location.

S3 Acceleration

If Yes, allows Amazon S3 Transfer Acceleration on the bucket, if enabled. To enable acceleration, see https://docs.aws.amazon.com/AmazonS3/latest/UG/enable-bucket-transfer-acceleration.html.

When allowing S3 Acceleration, keep in mind the following:

The specified Bucket name must be DNS-compliant.
Your Amazon account is charged for performing accelerated requests.

Destination

Download as	Select whether to store the downloaded data in a File, Folder or Attribute. File: The downloaded object will be stored in the specified folder. Folder: The downloaded folder object will be stored in the specified folder. Attribute: The downloaded object will be stored in the specified attribute.
Download to Attribute	Specify the attribute that will store the contents of the downloaded file. Valid for Download as Attribute only.
Response Body Encoding	For Download as Attribute, you can specify a character set encoding to ensure the output is in a human-readable form. If Auto Detect from HTTP Header is specified but there is no encoding in the Content-Type metadata associated with the data, the output will be returned as raw bytes.
Download to Folder	Specify the path to the folder that will store the downloaded file. Valid for Download as File or Folder.
If File Exists	Specify what to do if the file already exists locally. Valid for Download as File or Folder. Reject - If downloading a file, the input feature will be rejected. If downloading a folder, a rejected feature will be output for each rejected file. Overwrite - any existing local files or folders will be overwritten with the copy from S3.
Include Subfolders	Choose whether to download subfolders of the S3 Source or not. Valid for Download as Folder only. Default: No.

Output Attributes

Attributes to Add

The selected attributes will be added to the output feature.

_download_path

Path of the downloaded object on the local file system. This attribute will not be added for Download as Attribute.

Parameters - List Action

List Options

Bucket

The bucket the folder is in. If valid credentials have been provided as a web connection, you may browse for a bucket.

Path

The full path to the folder on S3 to list. If valid credentials have been provided as a web connection, you may browse for a location.

Include Subfolders

If set to Yes, then subfolders are recursively traversed, and their contents are included in the result.

Default: No.

Output Attributes

Attributes to Add

The selected attributes will be added to the output feature.

_name	Name of an object on S3.
_full_path	Full path to an object on S3
_url	URL of an object on S3.
_bucket_name	ID of an object on S3.
_file_or_folder	Type (file or folder) of an object on S3.
_file_size	Size of a file object on S3.
_file_last_modified	Last modified date of an object on S3.
_relative_path	Relative path to an object on S3.

Parameters - Upload Action

Data Source

Upload	The type of data to be uploaded. File: The specified file will be uploaded. Folder: The specified folder and its contents will be uploaded. Attribute: The contents of the specified attribute will be uploaded. When working with large objects, File is a better choice than Attribute as the data will be streamed directly from disk and not require that the object be stored entirely in memory on a feature. S3 treats file uploads of the same name, in a specific folder, as duplicates, but does not allow multiple instances in a specific folder. You must upload the file to a different folder than the existing one or the original will be overwritten. When wanting to upload content from a folder, it is better to upload as a folder instead of setting a fixed path and sending multiple features into the connector to upload as a file.
File to Upload	The file to be uploaded to S3 if Upload is set to File.
Folder to Upload	The folder to be uploaded to S3 if Upload is set to Folder.
Include Subfolders	Choose whether or not to upload subfolders of the Folder to Upload.
Contents Only	Yes: Upload only the contents of the folder to the remote destination. No: Upload the folder to the remote destination.
Attribute to Upload as File	The data to be uploaded, supplied from an attribute if Upload is set to Attribute.

Upload Options

Bucket	The bucket the folder is in. If valid credentials have been provided as a web connection, you may browse for a bucket.
Path	The full path to the folder on S3 to upload to. If valid credentials have been provided as a web connection, you may browse for a location.
Upload with File Name	The name of the file created from the data supplied in Attribute to Upload as File. The name must include a filename extension (for example, .txt, .jpg, .doc).
If File Exists	Specify what to do if the file already exists on S3. Reject - If uploading a file, the input feature will be rejected. If uploading a folder, rejected files will be listed in the Rejected Files attribute. Overwrite - any existing files or folders on S3 will be overwritten with the local copy.
S3 Acceleration	If Yes, allows Amazon S3 Transfer Acceleration on the bucket, if enabled. To enable acceleration, see https://docs.aws.amazon.com/AmazonS3/latest/UG/enable-bucket-transfer-acceleration.html. When allowing S3 Acceleration, keep in mind the following: The specified Bucket name must be DNS-compliant. Your Amazon account is charged for performing accelerated requests.
Encryption	Server-Side Encryption (AES-256): Instructs Amazon S3 to encrypt the data after it is uploaded using the 256-bit Advanced Encryption Standard (AES). For more information, see this AWS Blog post. None: Data is not encrypted after upload.
Canned ACL	The predefined set of grantees and permissions to store with each uploaded object. For more information, see https://docs.aws.amazon.com/AmazonS3/latest/dev/ACLOverview.html#canned-acl.
Generate Presigned URL	If enabled, a presigned URL is generated for the uploaded file, and stored in the _presigned_url attribute. This allows access to the file without credentials for the bucket. For more information, see https://docs.aws.amazon.com/AmazonS3/latest/dev/ShareObjectPreSignedURL.html.
Expiry	When generating a presigned URL, optionally specify a number of seconds for which the link will remain valid.
Metadata	You can specify header fields in the HTTP upload request. Under Name, specify a header field. You can select from a drop-down list of predefined fields that include metadata and ACL permissions parameters. Alternatively, enter fields manually. Under Value, specify a field value. Custom metadata fields will automatically be prefixed with ‘x-amz-meta-’ by AWS.

Output Attributes

Attributes to Add

The selected attributes will be added to the output feature.

_name	Name of the uploaded file or folder. For example, the attribute could contain ‘CityParks.gml’.
_full_path	Full path of the uploaded file or folder. For example, the attribute could contain ‘city_data/GML/CityParks.gml’.
_bucket_name	Name of the bucket to which the file or folder was uploaded .
_url	URL of the file or folder on S3.

Editing Transformer Parameters

Transformer parameters can be set by directly entering values, using expressions, or referencing other elements in the workspace such as attribute values or user parameters. Various editors and context menus are available to assist. To see what is available, click beside the applicable parameter.

How to Set Parameter Values

Defining Values

There are several ways to define a value for use in a Transformer. The simplest is to simply type in a value or string, which can include functions of various types such as attribute references, math and string functions, and workspace parameters.

Using the Text Editor

The Text Editor provides a convenient way to construct text strings (including regular expressions) from various data sources, such as attributes, parameters, and constants, where the result is used directly inside a parameter.

Text Editor

Using the Arithmetic Editor

The Arithmetic Editor provides a convenient way to construct math expressions from various data sources, such as attributes, parameters, and feature functions, where the result is used directly inside a parameter.

Arithmetic Editor

Conditional Values

Set values depending on one or more test conditions that either pass or fail.

Parameter Condition Definition Dialog

Content

Expressions and strings can include a number of functions, characters, parameters, and more.

When setting values - whether entered directly in a parameter or constructed using one of the editors - strings and expressions containing String, Math, Date/Time or FME Feature Functions will have those functions evaluated. Therefore, the names of these functions (in the form @<function_name>) should not be used as literal string values.

Content Types

String Functions	These functions manipulate and format strings.
Special Characters	A set of control characters is available in the Text Editor.
Math Functions	Math functions are available in both editors.
Date/Time Functions	Date and time functions are available in the Text Editor.
Math Operators	These operators are available in the Arithmetic Editor.
FME Feature Functions	These return primarily feature-specific values.
FME Parameters	FME and workspace-specific parameters may be used.
Creating and Modifying User Parameters	Create your own editable parameters.

Dialog Options - Tables

Table Tools

Transformers with table-style parameters have additional tools for populating and manipulating values.

Row Reordering

Enabled once you have clicked on a row item. Choices include:

Add a row
Remove a row
Move current row up one
Move current row down one
Move current row to top
Move current row to bottom

Cut, Copy, and Paste

Enabled once you have clicked on a row item. Choices include:

Cut a row - delete and copy to clipboard
Copy a row to the clipboard
Paste a row from the clipboard

Cut, copy, and paste may be used within a transformer, or between transformers.

Filter

Start typing a string, and the matrix will only display rows matching those characters. Searches all columns. This only affects the display of attributes within the transformer - it does not alter which attributes are output.

Import

Import populates the table with a set of new attributes read from a dataset. Specific application varies between transformers.

Reset/Refresh

Generally resets the table to its initial state, and may provide additional options to remove invalid entries. Behavior varies between transformers.

Note: Not all tools are available in all transformers.

For more information, see Transformer Parameter Menu Options.

Reference

Processing Behavior	Feature-Based
Feature Holding	No
Dependencies	S3 account
Aliases	S3Deleter, S3Downloader, S3ObjectLister, S3Uploader
History	Released FME 2019.0

FME Community

The FME Community is the place for demos, how-tos, articles, FAQs, and more. Get answers to your questions, learn from other users, and suggest, vote, and comment on new features.

Search for all results about the S3Connector on the FME Community.

Examples may contain information licensed under the Open Government Licence – Vancouver, Open Government Licence - British Columbia, and/or Open Government Licence – Canada.

S3Connector

Typical Uses

How does it work?

Usage Notes

Configuration

Input Ports

Output Ports

Parameters

Delete Options

Download Options

Destination

Output Attributes

List Options

Output Attributes

Data Source

Upload Options

Output Attributes

Editing Transformer Parameters

Defining Values

Using the Text Editor

Using the Arithmetic Editor

Conditional Values

Content

Table Tools

Reference

FME Community