Function Development

Supported Runtimes

The Node.js, Java, Python, Go, C#, PHP, and custom runtimes are supported. Table 1 lists the supported runtimes.

You are advised to use the latest runtime version.

**Table 1** Runtime description
Runtime	Supported Version	SDK Download Link
Node.js	6.10, 8.10, 10.16, 12.13, 16.17, 18.15.	-
Python	2.7, 3.6, 3.10	-
Java	8, 11	Java SDK (software package verification file: fss-java-sdk_sha256) NOTE: The Java runtime has integrated with Object Storage Service (OBS) SDKs.
Go	1.x	Go 1.x SDK (software package verification file: Go SDK_sha256)
C#	.NET Core 2.1, .NET Core 3.1	C# SDK (software package verification file: fssCsharp_sha256)
PHP	7.3	-
Custom	-	-

Third-Party Components Integrated with the Node.js Runtime

**Table 2** Third-party components integrated with the Node.js runtime
Name	Usage	Version
q	Asynchronous method encapsulation	1.5.1
co	Asynchronous process control	4.6.0
lodash	Common tool and method library	4.17.10
esdk-obs-nodejs	OBS SDK	2.1.5
express	Simplified web-based application development framework	4.16.4
fgs-express	Uses the Node.js application framework to run serverless applications and REST APIs in FunctionGraph and API Gateway. This component provides an example of using the Express framework to build serverless web applications or services and RESTful APIs.	1.0.1
request	Simplifies HTTP invocation and supports HTTPS and redirection.	2.88.0

Non-standard Libraries Integrated with the Python Runtime

**Table 3** Non-standard libraries integrated with the Python Runtime
Library	Usage	Version
dateutil	Date and time processing	2.6.0
requests	HTTP library	2.7.0
httplib2	HTTP client	0.10.3
numpy	Mathematical computation	1.13.1
redis	Redis client	2.10.5
obsclient	OBS client	-
smnsdk	Simple Message Notification (SMN) access	1.0.1

Sample Project Packages

Table 4 provides the links for downloading the sample project packages mentioned in this document. You can download the project packages to a local path and upload them when creating functions.

**Table 4** Download links of the sample project packages
Function	Project Package	Software Package Verification File
Node.js function	fss_examples_nodejs.zip	fss_examples_nodejs.sha256
Python function	fss_examples_python2.7.zip	fss_examples_python2.7_sha256
Java function	fss_example_java8.jar	fss_example_java8_sha256
Go function	fss_examples_go1.8.zip	fss_examples_go1.8_sha256
C# function	fss_example_csharp2.0 and fss_example_csharp2.1	fss_example_csharp2.0_sha256 fss_example_csharp2.1_sha256
PHP function	fss_examples_php7.3.zip	fss_examples_php7.3_sha256