st)` is a critical part of each interceptor’s implementation. This simple-looking method is where all the HTTP work happens, producing a response to satisfy the request. If `chain.proceed(request)` is being called more than once previous response bodies must be closed.

Interceptors can be chained. Suppose you have both a compressing interceptor and a checksumming interceptor: you'll need to decide whether data is compressed and then checksummed, or checksummed and then compressed. OkHttp...

# Use of this source code is governed by a BSD-style
# license that can be found in the LICENSE file.

# This program reads a file containing function prototypes
# (like syscall_solaris.go) and generates system call bodies.
# The prototypes are marked by lines beginning with "//sys"
# and read like func declarations if //sys is replaced by func, but:
#	* The parameter lists must give a name for each argument.
#	  This includes return parameters.

A **request** body is data sent by the client to your API. A **response** body is the data your API sends to the client.

Your API almost always has to send a **response** body. But clients don't necessarily need to send **request** bodies all the time.

To declare a **request** body, you use <a href="https://docs.pydantic.dev/" class="external-link" target="_blank">Pydantic</a> models with all their power and benefits.

!!! info

* **Editor desteği**.
* **Tip kontrolü**.

...ve **FastAPI** aynı belirteçleri şunlar için de kullanıyor:

* **Gereksinimleri tanımlama**:  request path parameters, query parameters, headers, bodies, dependencies, ve benzeri gereksinimlerden
* **Verileri çevirme**: Gönderilen veri tipinden istenilen veri tipine çevirme.
* **Verileri doğrulama**: Her gönderilen verinin:

Since the cache key is only influenced by the ABI of dependencies (and not by their implementation details like private types and method bodies), task output caching can also reuse compiled classes if they were produced by the same sources and ABI-equivalent dependencies.

For example, take a project with two modules: an application depending on a library.

	jsCtxUnknown
)

// element identifies the HTML element when inside a start tag or special body.
// Certain HTML element (for example <script> and <style>) have bodies that are
// treated differently from stateText so the element type is necessary to
// transition into the correct context at the end of a tag and to identify the
// end delimiter for the body.
type element uint8

	// Backup the data so we write the relocations at the front.
	var tmp bytes.Buffer
	io.Copy(&tmp, &w.Data)

	// TODO(mdempsky): Consider writing these out separately so they're
	// easier to strip, along with function bodies, so that we can prune
	// down to just the data that's relevant to go/types.
	if w.encodingRelocHeader {
		panic("encodingRelocHeader already true; recursive flush?")
	}
	w.encodingRelocHeader = true

* **Soporte en el editor**.
* **Type checks**.

...y **FastAPI** usa las mismas declaraciones para:

* **Definir requerimientos**: desde request path parameters, query parameters, headers, bodies, dependencies, etc.
* **Convertir datos**: desde el request al tipo requerido.
* **Validar datos**: viniendo de cada request:
    * Generando **errores automáticos** devueltos al cliente cuando los datos son inválidos.

David Chase <******@****.***> 1699395635 -0500

Matthew Dempsky <******@****.***> 1653076097 -0700