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Function Version


Function Versions are specific versions of JavaScript Node.js code that execute at a particular domain.

The steps to create Functions are as follows:

  1. Create a Function
  2. Create a Function Version (this resource) by making a POST request to https://serverless-upload.twilio.com

You will need the Function Version SID that the create request returns to include this Function in a Build.


Function Version properties

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Resource properties
sidtype: SID<ZN>Not PII

The unique string that we created to identify the Function Version resource.


service_sidtype: SID<ZS>Not PII

The SID of the Service that the Function Version resource is associated with.


function_sidtype: SID<ZH>Not PII

The SID of the Function resource that is the parent of the Function Version resource.


pathtype: stringPII MTL: 7 days

The URL-friendly string by which the Function Version resource can be referenced. It can be a maximum of 255 characters. All paths begin with a forward slash ('/'). If a Function Version creation request is submitted with a path not containing a leading slash, the path will automatically be prepended with one.


visibilitytype: enum<STRING>Not PII

The access control that determines how the Function Version resource can be accessed. Can be: public, protected, or private.

Possible values:
publicprivateprotected

date_createdtype: string<DATE TIME>Not PII

The date and time in GMT when the Function Version resource was created specified in ISO 8601(link takes you to an external page) format.


urltype: string<URI>Not PII

The absolute URL of the Function Version resource.


linkstype: object<URI MAP>Not PII

Create a Function Version resource

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A Function Version resource is created by making a POST request to the following, dedicated URL:

https://serverless-upload.twilio.com/v1/Services/{ServiceSid}/Functions/{FunctionSid}/Versions

The following example creates a Function Version resource using the language of your choice (or curl) and an external file, firstfunc.js, which contains the function body.

Upload Function body

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Node.js
Python
Java
PHP
Ruby
curl

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const fs = require('fs');
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// Before running this code, install "form-data" and "axios" using `npm install form-data axios`
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const FormData = require('form-data');
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const axios = require('axios');
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// Provision API Keys at twilio.com/console/runtime/api-keys
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// and set the environment variables. See http://twil.io/secure
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const apiKey = process.env.TWILIO_API_KEY;
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const apiSecret = process.env.TWILIO_API_SECRET;
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const serviceSid = 'ZSXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX';
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const functionSid = 'ZHXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX';
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const serviceUrl = `https://serverless-upload.twilio.com/v1/Services/${serviceSid}`;
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const uploadUrl = `${serviceUrl}/Functions/${functionSid}/Versions`;
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const form = new FormData();
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form.append('Path', '/thanos');
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form.append('Visibility', 'public');
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form.append('Content', fs.createReadStream('firstfunc.js'), {
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contentType: 'application/javascript',
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});
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// Create a new Function Version
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axios
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.post(uploadUrl, form, {
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auth: {
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username: apiKey,
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password: apiSecret,
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},
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headers: form.getHeaders(),
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})
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.then((response) => {
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const newVersionSid = response.data.sid;
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console.log(newVersionSid);
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});

(warning)

Warning

Note that the Serverless upload endpoint is on a different subdomain from the rest of the Serverless API (serverless-upload.twilio.com instead of serverless.twilio.com), and is not supported by the Twilio Helper Libraries at this time.

The create action accepts these parameters:

ParameterDescription
ContentThe Function code to upload as a JavaScript file.
FunctionSidThe SID of the Function resource to upload this code to.
PathThe path to assign the Function. Must be URL Friendly, without fragments, and the characters ;,?:@+&$()' " are disallowed.
ServiceSidThe SID of the Function's Service.
VisibilityThe visibility of the Function. Can be public, protected, or private.

Fetch a FunctionVersion resource

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GET https://serverless.twilio.com/v1/Services/{ServiceSid}/Functions/{FunctionSid}/Versions/{Sid}

URI parameters
ServiceSidtype: stringNot PII
Path Parameter

The SID of the Service to fetch the Function Version resource from.


FunctionSidtype: SID<ZH>Not PII
Path Parameter

The SID of the function that is the parent of the Function Version resource to fetch.


Sidtype: SID<ZN>Not PII
Path Parameter

The SID of the Function Version resource to fetch.

Fetch a Function Version resource

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Node.js
Python
C#
Java
Go
PHP
Ruby
twilio-cli
curl

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// Download the helper library from https://www.twilio.com/docs/node/install
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// Find your Account SID and Auth Token at twilio.com/console
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// and set the environment variables. See http://twil.io/secure
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const accountSid = process.env.TWILIO_ACCOUNT_SID;
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const authToken = process.env.TWILIO_AUTH_TOKEN;
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const client = require('twilio')(accountSid, authToken);
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client.serverless.v1.services('ZSXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX')
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.functions('ZHXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX')
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.functionVersions('ZNXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX')
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.fetch()
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.then(function_version => console.log(function_version.sid));

Output

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{
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"sid": "ZNXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX",
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"account_sid": "ACXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX",
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"service_sid": "ZSXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX",
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"function_sid": "ZHXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX",
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"path": "/test-path",
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"visibility": "public",
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"date_created": "2018-11-10T20:00:00Z",
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"url": "https://serverless.twilio.com/v1/Services/ZSXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX/Functions/ZH00000000000000000000000000000000/Versions/ZN00000000000000000000000000000000",
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"links": {
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"function_version_content": "https://serverless.twilio.com/v1/Services/ZSXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX/Functions/ZH00000000000000000000000000000000/Versions/ZN00000000000000000000000000000000/Content"
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}
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}


Read multiple FunctionVersion resources

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GET https://serverless.twilio.com/v1/Services/{ServiceSid}/Functions/{FunctionSid}/Versions

URI parameters
ServiceSidtype: stringNot PII
Path Parameter

The SID of the Service to read the Function Version resources from.


FunctionSidtype: SID<ZH>Not PII
Path Parameter

The SID of the function that is the parent of the Function Version resources to read.


PageSizetype: integerNot PII
Query Parameter

How many resources to return in each list page. The default is 50, and the maximum is 1000.


Pagetype: integerNot PII
Query Parameter

The page index. This value is simply for client state.


PageTokentype: stringNot PII
Query Parameter

The page token. This is provided by the API.

Read multiple Function Version resources

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Node.js
Python
C#
Java
Go
PHP
Ruby
twilio-cli
curl

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// Download the helper library from https://www.twilio.com/docs/node/install
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// Find your Account SID and Auth Token at twilio.com/console
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// and set the environment variables. See http://twil.io/secure
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const accountSid = process.env.TWILIO_ACCOUNT_SID;
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const authToken = process.env.TWILIO_AUTH_TOKEN;
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const client = require('twilio')(accountSid, authToken);
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client.serverless.v1.services('ZSXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX')
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.functions('ZHXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX')
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.functionVersions
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.list({limit: 20})
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.then(functionVersions => functionVersions.forEach(f => console.log(f.sid)));

Output

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{
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"function_versions": [],
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"meta": {
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"first_page_url": "https://serverless.twilio.com/v1/Services/ZSXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX/Functions/ZH00000000000000000000000000000000/Versions?PageSize=50&Page=0",
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"key": "function_versions",
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"next_page_url": "https://serverless.twilio.com/v1/Services/ZSXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX/Functions/ZH00000000000000000000000000000000/Versions?PageSize=50&Page=1",
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"page": 0,
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"page_size": 50,
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"previous_page_url": "https://serverless.twilio.com/v1/Services/ZSXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX/Functions/ZH00000000000000000000000000000000/Versions?PageSize=50&Page=0",
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"url": "https://serverless.twilio.com/v1/Services/ZSXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX/Functions/ZH00000000000000000000000000000000/Versions?PageSize=50&Page=0"
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}
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}

(information)

Info

There is no API endpoint for deleting a Function Version, only Functions. Function Versions are automatically purged if they are not used by a Build for 30 days. See our retention policy to learn more.


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