This topic shows you how to perform operations by using SDK for Node.js to call the required API operations with efficiency. For example, you can create and invoke functions.

Prerequisites

Make sure that the following operations are completed:

Node.js SDK example

'use strict';

const FCClient = require('@alicloud/fc2');
const fs = require("fs");

/*
The AccessKey pair of an Alibaba Cloud account can be used to access all API operations. Using these credentials to perform operations in Function Compute is a high-risk operation. We recommend that you use a RAM user to call API operations or perform routine O&M. 
We recommend that you do not save the AccessKey ID and AccessKey secret to your project code. Otherwise, the AccessKey pair may be leaked and the security of all resources in your account may be compromised. 
In this example, the AccessKey pair is saved to the environment variables for authentication. 
Configure the ALIBABA_CLOUD_ACCESS_KEY_ID and ALIBABA_CLOUD_ACCESS_KEY_SECRET environment variables in your local environment before you run the sample code. 
In the runtime environments of Function Compute, the ALIBABA_CLOUD_ACCESS_KEY_ID and ALIBABA_CLOUD_ACCESS_KEY_SECRET environment variables are automatically configured after you configure the execution permissions. 
*/
var client = new FCClient('<account id>', {
  accessKeyID: process.env['ALIBABA_CLOUD_ACCESS_KEY_ID'],
  accessKeySecret: process.env['ALIBABA_CLOUD_ACCESS_KEY_SECRET'],
  region: 'cn-shanghai',
});

var serviceName = '<service name>';
var funcName = '<function name>';

async function test () {
  try {
    var resp = await client.createService(serviceName);
    console.log('create service: %j', resp);

    resp = await client.createFunction(serviceName, {
      functionName: funcName,
      handler: 'counter.handler',
      memorySize: 128,
      runtime: 'nodejs14',
      initializer: 'counter.initializer',
      code: {
        zipFile: fs.readFileSync('/tmp/counter.zip', 'base64'),
      },
    });
    console.log('create function: %j', resp);

    // By default, responses are decoded in UTF-8. 
    resp = await client.invokeFunction(serviceName, funcName, null);
    console.log('invoke function: %j', resp);

    // If the rawBuf parameter is set to true in options, respWithBuf is returned as the buffer. 
    var respWithBuf = await client.invokeFunction(serviceName, funcName, null, {}, 'LATEST', {rawBuf:true});

    var uResp = await client.updateFunction(serviceName, funcName, {
      description: 'updated function desc',
      initializationTimeout: 60,
    });
    console.log('update function: %j', resp);
  } catch (err) {
    console.error(err);
  }
}
test().then();

Sample code of SDK for Node.js used for asynchronous invocation

Note
  • Asynchronous invocation is supported in Node.js 7.6 and later.
  • For more information about the request headers for asynchronous invocation, see PutFunctionAsyncInvokeConfig. 
'use strict';

const FCClient = require('@alicloud/fc2');
const fs = require("fs");
/*
The AccessKey pair of an Alibaba Cloud account can be used to access all API operations. Using these credentials to perform operations in Function Compute is a high-risk operation. We recommend that you use a RAM user to call API operations or perform routine O&M. 
We recommend that you do not save the AccessKey ID and AccessKey secret to your project code. Otherwise, the AccessKey pair may be leaked and the security of all resources in your account may be compromised. 
In this example, the AccessKey pair is saved to the environment variables for authentication. 
Configure the ALIBABA_CLOUD_ACCESS_KEY_ID and ALIBABA_CLOUD_ACCESS_KEY_SECRET environment variables in your local environment before you run the sample code. 
In the runtime environments of Function Compute, the ALIBABA_CLOUD_ACCESS_KEY_ID and ALIBABA_CLOUD_ACCESS_KEY_SECRET environment variables are automatically configured after you configure the execution permissions. 
*/
var client = new FCClient('<account id>', {
  accessKeyID: process.env['ALIBABA_CLOUD_ACCESS_KEY_ID'],
  accessKeySecret: process.env['ALIBABA_CLOUD_ACCESS_KEY_SECRET'],
  region: 'cn-shanghai',
});

var serviceName = '<service name>';
var funcName = '<function name>';

async function test () {
  try {
    var resp = await client.createService(serviceName);
    console.log('create service: %j', resp);

    resp = await client.createFunction(serviceName, {
      functionName: funcName,
      handler: 'counter.handler',
      memorySize: 128,
      runtime: 'nodejs14',
      initializer: 'counter.initializer',
      code: {
        zipFile: fs.readFileSync('/tmp/counter.zip', 'base64'),
      },
    });
    console.log('create function: %j', resp);

    // By default, responses are decoded in UTF-8. 
    resp = await client.invokeFunction(serviceName, funcName, null);
    console.log('invoke function: %j', resp);

    // If the rawBuf parameter is set to true in options, respWithBuf is returned as the buffer. 
    var respWithBuf = await client.invokeFunction(serviceName, funcName, null, {}, 'LATEST', {rawBuf:true});

    var uResp = await client.updateFunction(serviceName, funcName, {
      description: 'updated function desc',
      initializationTimeout: 60,
    });
    console.log('update function: %j', resp);
  } catch (err) {
    console.error(err);
  }
}
test().then();