A JSON extractor is an Actix Web request extractor that deserializes an HTTP request body into a typed Rust value.
A JSON extractor is an Actix Web request extractor that deserializes an HTTP POST or PUT body into a typed Rust value such as CreateCourse or UpdateCourse. section 6.2.2
Creating a course
A handler accepts web::Json<CreateCourse>, converts it with new_course.into()?, passes the resulting value to database access code, and returns the created course as JSON. section 6.2.2
How Rust Servers, Services, and Apps covers it
How deep it goes
Shows extractor signatures and conversion into domain values, but defers deserializer internals.
Examples
Uses CreateCourse for POST requests and UpdateCourse for PUT requests in course handlers.
What it assumes
Assumes Rust structs, asynchronous handlers, and Actix Web routing while demonstrating typed body extraction in context.
What you can do after
Apply it via Actix Web by declaring web::Json<T> handler parameters and converting them into application values.
How it connects
Connects HTTP request bodies, deserialization, From conversion, asynchronous handlers, and database access.
serdeuses · Serde is a Rust framework for serializing and deserializing data structures across external data formats.
BSONcontrasts with · BSON is a binary-encoded serialization format for JSON-like documents and values, with support for additional data types such as dates and binary data.
This explainer was generated by Manning's knowledge graph from the text of Rust Servers, Services, and Apps. The section links point to the parts of the book it draws on.
