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Trigger Management
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Last updated: 2024-12-02 20:07:18
Trigger Management
Last updated: 2024-12-02 20:07:18
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Currently, HTTP-triggered functions only support API Gateway triggers. You can bind API Gateway triggers in the SCF console or bind backend functions in the API Gateway console.

Trigger Type Description

For HTTP-triggered functions, triggers support two creation methods: default creation and custom creation. You can choose an appropriate method according to the actual situation:
Function
Default Creation (Basic API Gateway)
Custom Creation (Standard API Gateway)
Default domain name
Supported
Supported
Binding to custom domain name
Manual binding
Management in API Gateway console
Request method configuration
Supported
Supported
Release environment configuration
Supported
Supported
Authentication method configuration
Supported
Supported
Visibility in API Gateway console
Invisible
Visible
Advanced API Gateway capabilities (such as plugin and dedicated instance)
Not supported
Supported
Billing method
Gateway calls are not billed.
It is billed by standard API Gateway billable items.
Type conversion
The gateway can be upgraded to a standard API Gateway instance. After upgrade, you can use all gateway capabilities and billed by standard API Gateway billable items.
The gateway edition cannot be changed. A standard API Gateway instance cannot be rolled back to a basic API Gateway instance in default creation.

Trigger Overview

Characteristics of HTTP API Gateway triggers:
Passthrough HTTP request After API Gateway receives an HTTP request, if the API Gateway backend is connected with an SCF function, the function will be triggered. At this time, API Gateway will directly pass through the HTTP request, without performing event type format conversion. HTTP request information includes the specific service that receives the request, API rule, actual request path, method, and path, header, and query of the request.
Sync invocation API Gateway invokes the function synchronously, and it will wait for the function to return before the timeout period configured in it elapses. For more information on invocation types, see Invocation Types.

Trigger Configuration

Basic gateways can only be bound in the default creation method in the SCF console.
API Gateway triggers can be configured in the SCF console or the API Gateway console. For more information on trigger configuration, see Overview.

Trigger Binding Limits

In API Gateway, one API rule can be bound to only one function, but one function can be bound to multiple API rules as the backend. You can create an API with different paths in the API Gateway console and point the backend to the same function. APIs with the same path, same request method, and different release environments are regarded as the same API and cannot be bound repeatedly.

Request and Response

Request method is the method to process request sent from API Gateway to SCF, and response method is the method to process the returned value sent from SCF to API Gateway. For HTTP-triggered functions, API Gateway will add the information required for function triggering in the header and directly pass through the original request to trigger the backend function.
Note:
The following parameters don't support custom configuration:
connection field
Custom fields starting with X-SCF-
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