Middleware: Middleware (Base Class)

In aisdk: Unified Interface for AI Model Providers

Middleware (Base Class)

Description

Defines a middleware that can intercept and modify model operations.

Public fields

name

A descriptive name for this middleware.

Methods

Public methods

• Middleware$transform_params()

• Middleware$wrap_generate()

• Middleware$wrap_stream()

• Middleware$clone()

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Method transform_params()

Transform parameters before calling the model.

Usage

Middleware$transform_params(params, type, model)

Arguments

params

The original call parameters.

type

Either "generate" or "stream".

model

The model being called.

Returns

The transformed parameters.

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Method wrap_generate()

Wrap the generate operation.

Usage

Middleware$wrap_generate(do_generate, params, model)

Arguments

do_generate

A function that calls the model's do_generate.

params

The (potentially transformed) parameters.

model

The model being called.

Returns

The result of the generation.

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Method wrap_stream()

Wrap the stream operation.

Usage

Middleware$wrap_stream(do_stream, params, model, callback)

Arguments

do_stream

A function that calls the model's do_stream.

params

The (potentially transformed) parameters.

model

The model being called.

callback

The streaming callback function.

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Method clone()

The objects of this class are cloneable with this method.

Usage

Middleware$clone(deep = FALSE)

Arguments

deep

Whether to make a deep clone.

aisdk documentation built on May 29, 2026, 9:07 a.m.