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Package http-emitter
Short Description PSR-7 response emitter for Componenta
License MIT
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Informations about the package http-emitter
Componenta HTTP Emitter
PSR-7 response emitter for Componenta HTTP applications. It sends status, headers, and body content to PHP output.
Use this package at the outer HTTP entry point after the PSR-15 pipeline has produced a ResponseInterface.
Boundary
This package only emits an already built response. It does not build responses, create server requests, or run middleware. Use componenta/http-responder for response creation and componenta/app-http for the HTTP runtime pipeline.
Installation
Componenta\Http\EmitterConfigProvider is exposed through Composer metadata.
Public API
EmitterInterface::emit(ResponseInterface $response): void emits a response. Emitter is the default implementation.
Emitter accepts an optional chunk size:
EmitStrategy controls body emission:
| Case | Meaning |
|---|---|
Full |
Emit the full response body. |
Partial |
Emit a range response body. |
NoBody |
Emit headers without a body. |
EmitterException is thrown for emitter-level failures.
Runtime Behavior
Before emitting, Emitter checks that headers have not already been sent and clears active output buffers. Then it chooses a strategy from the response status and headers:
| Strategy | When it is used |
|---|---|
NoBody |
Informational statuses, 204, 205, or 304. |
Partial |
Status 206 with a Content-Range header. |
Full |
All other responses. |
For full responses, the emitter adds Content-Length when the stream is seekable, its size is known, and both Content-Length and Transfer-Encoding are absent. For non-seekable streams it sends the remaining body without inferring its length from the total stream size. For seekable streams with known size it also adds Accept-Ranges: bytes. Bodies are streamed in chunks and stop early if the client disconnects.
For partial responses, the emitter sends the body already prepared by the response producer and preserves Content-Range. Responses with status 416 retain their explanatory body. Responses with status 304 retain Content-Location while emitting no body.
Configuration
The config provider registers Emitter and aliases EmitterInterface to it. Applications normally receive the emitter from the container.
Tests
Run composer test. HTTP header tests use php-cgi beside the active PHP executable; set PHP_CGI_BINARY when it is installed elsewhere. These tests are skipped if CGI is unavailable, so install CGI in CI to verify response headers as well as bodies.
Related Packages
componenta/app-httpuses the emitter in the HTTP runtime.componenta/http-responderbuilds PSR-7 responses.
