Payload
A payload is the data, code, or other material carried by or attached to a message, token, system, or operation.
Secure APIs
A request payload is the data sent to an API server in the body of a request to create or update a resource.
- How it is used
- Uses request payloads to create or update API resources while framing them as an attack surface requiring validation.
- How deep it goes
- Defines payloads, demonstrates an unexpected-property vulnerability, and recommends constraints, allowlists, and continuous testing.
- Examples
- Uses a fintech payment endpoint where an extra payload property can manipulate payment state and bypass funds checks.
- What you can do after
- Diagnose/debug with it by identifying unexpected fields, constraining payload schemas, and testing resource-changing requests for bypasses.
Refactoring to Rust
An HTTP request body is the data payload carried in an HTTP request separately from its headers and request line.
- How it is used
- Supplies POST data to a Rust NGINX handler after NGINX reads the request body.
- How deep it goes
- Works through callback-based loading, pointer checks, buffer slicing, and UTF-8 validation; stops before writing an HTTP response.
- Examples
- Uses a curl POST carrying `3 4 * 2 -` and a handler that logs the extracted body.
- What you can do after
- Build it from scratch: read an NGINX request body into a checked Rust string slice for a handler.
Learn Go with Pocket-Sized Projects
A request body is the content-bearing part of an HTTP request that carries data submitted to a server.
- How it is used
- Carries submitted data for an HTTP API operation, such as a player's guess.
- How deep it goes
- Explains payload shape, Go decoding, JSON tags, and malformed-input handling, but does not detail validation beyond decoding.
- Examples
- Uses a Gordle guess payload, GuessRequest, PUT /games/{game_id}, and json.NewDecoder(request.Body).Decode.
- What you can do after
- Build request handlers that decode JSON payloads and return HTTP 400 for malformed request bodies.
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Acing the CCNA Exam: Volume 1 Fundamentals and Protocols
A payload is the data carried inside a protocol data unit, excluding that unit's protocol control information.
- How it is used
- Clarifies what each TCP/IP protocol data unit carries during encapsulation and de-encapsulation.
- How deep it goes
- Defines nested payloads and follows their wrapping and removal, but stops short of protocol-specific field analysis.
- Examples
- Uses application data, segments, packets, and frames to illustrate progressively nested protocol data units.
- What you can do after
- Evaluate a segment, packet, or frame by identifying which encapsulated contents form its payload.
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ASP.NET Core in Action, 3e
A JWT payload is the token section that contains its claims and other encoded data.
- How it is used
- Carries client-supplied data to HTTP endpoints, especially minimal API handlers receiving JSON requests.
- How deep it goes
- Explains request-body binding, automatic deserialization, and serializer options, while deferring detailed model binding.
- Examples
- Uses Product and Fruit records, JSON objects, POST requests, and minimal API handler parameters as concrete payload examples.
- What you can do after
- Apply it via ASP.NET Core minimal APIs by sending JSON and receiving the deserialized complex object in a handler.
Rust Servers, Services, and Apps
An HTTP message body is the optional content payload carried after an HTTP message's headers.
- How it is used
- Carries optional content in HTTP requests and responses.
- How deep it goes
- Shows request-body storage and response-body serialization, without detailing body-content processing.
- Examples
- Uses an order-shipping status string as a response body in construction and serialization tests.
- What you can do after
- Build and test Rust structures that store request bodies and serialize response bodies.
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The Art of Code
The application data carried by a network request or response apart from its communication metadata.
- How it is used
- Optimizes client–server communication by reducing transferred data and unnecessary network calls.
- How deep it goes
- Explains practical API, caching, and synchronization strategies but stops short of detailed payload-format or protocol implementation.
- Examples
- Uses a customer response containing contact details, orders, and preferences to expose oversized transferred data.
- What you can do after
- Apply it via API design and HTTP caching to reduce calls and transferred data.
Pro ASP.NET Core 7, Tenth Edition
A token payload is the data section of a security token that contains claims and other token properties.
- How it is used
- Uses claims in a JWT payload to identify users on subsequent authenticated HTTP requests.
- How deep it goes
- Explains payload contents, generation, protection, and request use, but does not detail claim validation beyond the username.
- Examples
- Shows unique_name, nbf, exp, and iat in a decoded payload, then places the token in a bearer Authorization header.
- What you can do after
- Build it from validated credentials by generating a JWT payload and send the resulting token with later authenticated requests.
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Related concepts
- contractpart of · An API contract is a specification of the operations, data, and behavioral expectations that govern interactions between software components.
- JSONuses · JSON is a standardized, language-independent text format for representing structured data using objects, arrays, strings, numbers, Boolean values, and null.
- api callpart of · An API call is a programmatic request or invocation through an application programming interface to access data or invoke an operation.
- request messageused by · An HTTP request is a message sent by a client to a server that specifies a method and target and may include headers and a body.
- HTTP GETcontrasts with · HTTP GET is a request method for retrieving a representation of a resource identified by the request target, without requesting a state change.
These guides are generated from the text of Manning books by Manning's knowledge graph and link to the sections they draw on. The full books are available on liveBook and at manning.com.