Http.ResponseWriter
http.ResponseWriter is the Go interface through which an HTTP handler constructs a response by writing its headers, status, and body.
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http.ResponseWriter is a Go interface through which an HTTP handler constructs a response, including its headers, status, and body.
- How it is used
- Builds the headers, status, and body returned by Go HTTP handlers.
- How deep it goes
- Explains write ordering and defaults through handlers and tests, without implementing the interface itself.
- Examples
- Uses a POST /games JSON response, a plain-text or HTML page, and a controlled test-server response.
- What you can do after
- Build it from scratch: write handler responses with the intended headers and status, then test them with httptest.NewRecorder().
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Go by Example
http.ResponseWriter is the Go HTTP interface through which a handler constructs an HTTP response and accesses connection-related response behavior.
- How it is used
- Constructs HTTP responses inside handlers and supplies a test seam for observing them.
- How deep it goes
- Defines core response methods, ordering, default status behavior, testing, optional interfaces, and wrapper unwrapping.
- Examples
- Uses an OK health endpoint, a ResponseRecorder test, conditional flushing, and oversized-request connection closure.
- What you can do after
- Apply it via the net/http package to send, test, flush, and unwrap handler responses.
Related concepts
- httptest.ResponseRecorderincludes · httptest.ResponseRecorder is a Go testing type that records an HTTP handler’s status, headers, and body for inspection.
- handlerused by · A handler is a callable or software component that processes an event, request, message, or other input and performs associated processing.
- aspectimplemented by · An aspect is a modular unit of cross-cutting behavior applied around selected program operations or method invocations.
- struct embeddingused by · Struct embedding is a Go language feature that includes an anonymous field of one type in a struct and promotes the embedded type’s fields and methods.
- io.Writerkind of · io.Writer is a Go interface whose Write method accepts a byte sequence and returns the number of bytes written and any error.
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