Principle:Langchain ai Langchain Input Preparation For Streaming

Knowledge Sources	LangChain
Domains	NLP, Data_Preprocessing
Last Updated	2026-02-11 00:00 GMT

Overview

Normalization of user inputs into a unified message format as the first step of the streaming pipeline.

Description

The same input normalization used in non-streaming invocation applies to the streaming path. Both stream() and astream() call _convert_input() to normalize the input before configuring callbacks and initiating the streaming provider call. This ensures consistent input handling regardless of the execution path.

Usage

This is applied automatically within stream() and astream(). The developer does not interact with it directly.

Theoretical Basis

Same as the non-streaming Input_Preparation principle. The streaming path reuses the identical normalization logic.

Related Pages

Implemented By

• Implementation:Langchain_ai_Langchain_BaseChatModel_Convert_Input_For_Streaming