mirror of
https://github.com/actix/actix-web.git
synced 2024-06-12 02:09:36 +00:00
817 lines
23 KiB
Rust
817 lines
23 KiB
Rust
//! HTTP responses.
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use std::{
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cell::{Ref, RefMut},
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fmt,
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future::Future,
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pin::Pin,
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str,
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task::{Context, Poll},
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};
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use bytes::{Bytes, BytesMut};
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use futures_core::Stream;
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use crate::{
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body::{Body, BodyStream, MessageBody, ResponseBody},
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error::Error,
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extensions::Extensions,
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header::{IntoHeaderPair, IntoHeaderValue},
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http::{header, Error as HttpError, HeaderMap, StatusCode},
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message::{BoxedResponseHead, ConnectionType, ResponseHead},
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};
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/// An HTTP Response
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pub struct Response<B> {
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head: BoxedResponseHead,
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body: ResponseBody<B>,
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error: Option<Error>,
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}
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impl Response<Body> {
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/// Constructs a response
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#[inline]
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pub fn new(status: StatusCode) -> Response<Body> {
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Response {
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head: BoxedResponseHead::new(status),
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body: ResponseBody::Body(Body::Empty),
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error: None,
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}
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}
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/// Create HTTP response builder with specific status.
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#[inline]
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pub fn build(status: StatusCode) -> ResponseBuilder {
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ResponseBuilder::new(status)
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}
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// just a couple frequently used shortcuts
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// this list should not grow larger than a few
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/// Creates a new response with status 200 OK.
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#[inline]
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pub fn ok() -> Response<Body> {
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Response::new(StatusCode::OK)
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}
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/// Creates a new response with status 400 Bad Request.
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#[inline]
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pub fn bad_request() -> Response<Body> {
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Response::new(StatusCode::BAD_REQUEST)
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}
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/// Creates a new response with status 404 Not Found.
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#[inline]
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pub fn not_found() -> Response<Body> {
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Response::new(StatusCode::NOT_FOUND)
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}
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/// Creates a new response with status 500 Internal Server Error.
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#[inline]
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pub fn internal_server_error() -> Response<Body> {
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Response::new(StatusCode::INTERNAL_SERVER_ERROR)
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}
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// end shortcuts
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/// Constructs an error response
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#[inline]
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pub fn from_error(error: Error) -> Response<Body> {
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let mut resp = error.as_response_error().error_response();
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if resp.head.status == StatusCode::INTERNAL_SERVER_ERROR {
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error!("Internal Server Error: {:?}", error);
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}
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resp.error = Some(error);
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resp
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}
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/// Convert response to response with body
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pub fn into_body<B>(self) -> Response<B> {
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let b = match self.body {
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ResponseBody::Body(b) => b,
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ResponseBody::Other(b) => b,
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};
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Response {
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head: self.head,
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error: self.error,
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body: ResponseBody::Other(b),
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}
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}
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}
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impl<B> Response<B> {
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/// Constructs a response with body
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#[inline]
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pub fn with_body(status: StatusCode, body: B) -> Response<B> {
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Response {
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head: BoxedResponseHead::new(status),
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body: ResponseBody::Body(body),
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error: None,
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}
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}
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#[inline]
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/// Http message part of the response
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pub fn head(&self) -> &ResponseHead {
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&*self.head
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}
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#[inline]
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/// Mutable reference to a HTTP message part of the response
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pub fn head_mut(&mut self) -> &mut ResponseHead {
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&mut *self.head
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}
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/// The source `error` for this response
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#[inline]
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pub fn error(&self) -> Option<&Error> {
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self.error.as_ref()
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}
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/// Get the response status code
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#[inline]
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pub fn status(&self) -> StatusCode {
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self.head.status
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}
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/// Set the `StatusCode` for this response
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#[inline]
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pub fn status_mut(&mut self) -> &mut StatusCode {
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&mut self.head.status
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}
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/// Get the headers from the response
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#[inline]
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pub fn headers(&self) -> &HeaderMap {
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&self.head.headers
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}
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/// Get a mutable reference to the headers
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#[inline]
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pub fn headers_mut(&mut self) -> &mut HeaderMap {
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&mut self.head.headers
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}
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/// Connection upgrade status
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#[inline]
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pub fn upgrade(&self) -> bool {
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self.head.upgrade()
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}
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/// Keep-alive status for this connection
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pub fn keep_alive(&self) -> bool {
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self.head.keep_alive()
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}
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/// Responses extensions
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#[inline]
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pub fn extensions(&self) -> Ref<'_, Extensions> {
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self.head.extensions.borrow()
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}
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/// Mutable reference to a the response's extensions
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#[inline]
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pub fn extensions_mut(&mut self) -> RefMut<'_, Extensions> {
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self.head.extensions.borrow_mut()
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}
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/// Get body of this response
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#[inline]
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pub fn body(&self) -> &ResponseBody<B> {
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&self.body
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}
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/// Set a body
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pub fn set_body<B2>(self, body: B2) -> Response<B2> {
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Response {
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head: self.head,
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body: ResponseBody::Body(body),
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error: None,
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}
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}
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/// Split response and body
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pub fn into_parts(self) -> (Response<()>, ResponseBody<B>) {
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(
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Response {
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head: self.head,
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body: ResponseBody::Body(()),
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error: self.error,
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},
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self.body,
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)
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}
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/// Drop request's body
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pub fn drop_body(self) -> Response<()> {
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Response {
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head: self.head,
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body: ResponseBody::Body(()),
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error: None,
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}
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}
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/// Set a body and return previous body value
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pub(crate) fn replace_body<B2>(self, body: B2) -> (Response<B2>, ResponseBody<B>) {
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(
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Response {
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head: self.head,
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body: ResponseBody::Body(body),
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error: self.error,
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},
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self.body,
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)
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}
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/// Set a body and return previous body value
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pub fn map_body<F, B2>(mut self, f: F) -> Response<B2>
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where
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F: FnOnce(&mut ResponseHead, ResponseBody<B>) -> ResponseBody<B2>,
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{
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let body = f(&mut self.head, self.body);
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Response {
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body,
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head: self.head,
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error: self.error,
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}
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}
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/// Extract response body
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pub fn take_body(&mut self) -> ResponseBody<B> {
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self.body.take_body()
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}
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}
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impl<B: MessageBody> fmt::Debug for Response<B> {
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fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
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let res = writeln!(
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f,
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"\nResponse {:?} {}{}",
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self.head.version,
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self.head.status,
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self.head.reason.unwrap_or(""),
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);
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let _ = writeln!(f, " headers:");
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for (key, val) in self.head.headers.iter() {
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let _ = writeln!(f, " {:?}: {:?}", key, val);
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}
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let _ = writeln!(f, " body: {:?}", self.body.size());
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res
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}
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}
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impl<B: Unpin> Future for Response<B> {
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type Output = Result<Response<B>, Error>;
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fn poll(mut self: Pin<&mut Self>, _: &mut Context<'_>) -> Poll<Self::Output> {
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Poll::Ready(Ok(Response {
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head: self.head.take(),
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body: self.body.take_body(),
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error: self.error.take(),
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}))
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}
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}
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/// An HTTP response builder.
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///
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/// This type can be used to construct an instance of `Response` through a builder-like pattern.
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pub struct ResponseBuilder {
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head: Option<BoxedResponseHead>,
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err: Option<HttpError>,
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}
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impl ResponseBuilder {
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#[inline]
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/// Create response builder
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pub fn new(status: StatusCode) -> Self {
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ResponseBuilder {
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head: Some(BoxedResponseHead::new(status)),
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err: None,
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}
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}
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/// Set HTTP status code of this response.
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#[inline]
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pub fn status(&mut self, status: StatusCode) -> &mut Self {
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if let Some(parts) = parts(&mut self.head, &self.err) {
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parts.status = status;
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}
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self
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}
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/// Insert a header, replacing any that were set with an equivalent field name.
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///
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/// ```
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/// # use actix_http::Response;
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/// use actix_http::http::{header, StatusCode};
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///
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/// Response::build(StatusCode::OK)
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/// .insert_header((header::CONTENT_TYPE, mime::APPLICATION_JSON))
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/// .insert_header(("X-TEST", "value"))
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/// .finish();
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/// ```
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pub fn insert_header<H>(&mut self, header: H) -> &mut Self
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where
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H: IntoHeaderPair,
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{
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if let Some(parts) = parts(&mut self.head, &self.err) {
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match header.try_into_header_pair() {
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Ok((key, value)) => {
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parts.headers.insert(key, value);
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}
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Err(e) => self.err = Some(e.into()),
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};
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}
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self
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}
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/// Append a header, keeping any that were set with an equivalent field name.
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///
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/// ```
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/// # use actix_http::Response;
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/// use actix_http::http::{header, StatusCode};
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///
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/// Response::build(StatusCode::OK)
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/// .append_header((header::CONTENT_TYPE, mime::APPLICATION_JSON))
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/// .append_header(("X-TEST", "value1"))
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/// .append_header(("X-TEST", "value2"))
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/// .finish();
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/// ```
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pub fn append_header<H>(&mut self, header: H) -> &mut Self
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where
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H: IntoHeaderPair,
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{
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if let Some(parts) = parts(&mut self.head, &self.err) {
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match header.try_into_header_pair() {
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Ok((key, value)) => parts.headers.append(key, value),
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Err(e) => self.err = Some(e.into()),
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};
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}
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self
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}
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/// Set the custom reason for the response.
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#[inline]
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pub fn reason(&mut self, reason: &'static str) -> &mut Self {
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if let Some(parts) = parts(&mut self.head, &self.err) {
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parts.reason = Some(reason);
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}
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self
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}
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/// Set connection type to KeepAlive
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#[inline]
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pub fn keep_alive(&mut self) -> &mut Self {
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if let Some(parts) = parts(&mut self.head, &self.err) {
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parts.set_connection_type(ConnectionType::KeepAlive);
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}
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self
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}
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/// Set connection type to Upgrade
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#[inline]
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pub fn upgrade<V>(&mut self, value: V) -> &mut Self
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where
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V: IntoHeaderValue,
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{
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if let Some(parts) = parts(&mut self.head, &self.err) {
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parts.set_connection_type(ConnectionType::Upgrade);
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}
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if let Ok(value) = value.try_into_value() {
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self.insert_header((header::UPGRADE, value));
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}
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self
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}
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/// Force close connection, even if it is marked as keep-alive
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#[inline]
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pub fn force_close(&mut self) -> &mut Self {
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if let Some(parts) = parts(&mut self.head, &self.err) {
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parts.set_connection_type(ConnectionType::Close);
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}
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self
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}
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/// Disable chunked transfer encoding for HTTP/1.1 streaming responses.
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#[inline]
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pub fn no_chunking(&mut self, len: u64) -> &mut Self {
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let mut buf = itoa::Buffer::new();
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self.insert_header((header::CONTENT_LENGTH, buf.format(len)));
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if let Some(parts) = parts(&mut self.head, &self.err) {
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parts.no_chunking(true);
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}
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self
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}
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/// Set response content type.
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#[inline]
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pub fn content_type<V>(&mut self, value: V) -> &mut Self
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where
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V: IntoHeaderValue,
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{
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if let Some(parts) = parts(&mut self.head, &self.err) {
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match value.try_into_value() {
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Ok(value) => {
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parts.headers.insert(header::CONTENT_TYPE, value);
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}
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Err(e) => self.err = Some(e.into()),
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};
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}
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self
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}
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/// Responses extensions
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#[inline]
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pub fn extensions(&self) -> Ref<'_, Extensions> {
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let head = self.head.as_ref().expect("cannot reuse response builder");
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head.extensions.borrow()
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}
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/// Mutable reference to a the response's extensions
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#[inline]
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pub fn extensions_mut(&mut self) -> RefMut<'_, Extensions> {
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let head = self.head.as_ref().expect("cannot reuse response builder");
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head.extensions.borrow_mut()
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}
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/// Set a body and generate `Response`.
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///
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/// `ResponseBuilder` can not be used after this call.
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#[inline]
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pub fn body<B: Into<Body>>(&mut self, body: B) -> Response<Body> {
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self.message_body(body.into())
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}
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/// Set a body and generate `Response`.
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///
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/// `ResponseBuilder` can not be used after this call.
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pub fn message_body<B>(&mut self, body: B) -> Response<B> {
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if let Some(e) = self.err.take() {
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return Response::from(Error::from(e)).into_body();
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}
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let response = self.head.take().expect("cannot reuse response builder");
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Response {
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head: response,
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body: ResponseBody::Body(body),
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error: None,
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}
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}
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/// Set a streaming body and generate `Response`.
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///
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/// `ResponseBuilder` can not be used after this call.
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#[inline]
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pub fn streaming<S, E>(&mut self, stream: S) -> Response<Body>
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where
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S: Stream<Item = Result<Bytes, E>> + Unpin + 'static,
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E: Into<Error> + 'static,
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{
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self.body(Body::from_message(BodyStream::new(stream)))
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}
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/// Set an empty body and generate `Response`
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///
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/// `ResponseBuilder` can not be used after this call.
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#[inline]
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pub fn finish(&mut self) -> Response<Body> {
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self.body(Body::Empty)
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}
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/// This method construct new `ResponseBuilder`
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pub fn take(&mut self) -> ResponseBuilder {
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ResponseBuilder {
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head: self.head.take(),
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err: self.err.take(),
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}
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}
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}
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#[inline]
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fn parts<'a>(
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parts: &'a mut Option<BoxedResponseHead>,
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err: &Option<HttpError>,
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) -> Option<&'a mut ResponseHead> {
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if err.is_some() {
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return None;
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}
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parts.as_mut().map(|r| &mut **r)
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}
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/// Convert `Response` to a `ResponseBuilder`. Body get dropped.
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impl<B> From<Response<B>> for ResponseBuilder {
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fn from(res: Response<B>) -> ResponseBuilder {
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ResponseBuilder {
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head: Some(res.head),
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err: None,
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}
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}
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}
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/// Convert `ResponseHead` to a `ResponseBuilder`
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impl<'a> From<&'a ResponseHead> for ResponseBuilder {
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fn from(head: &'a ResponseHead) -> ResponseBuilder {
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let mut msg = BoxedResponseHead::new(head.status);
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msg.version = head.version;
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msg.reason = head.reason;
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for (k, v) in head.headers.iter() {
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msg.headers.append(k.clone(), v.clone());
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}
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msg.no_chunking(!head.chunked());
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ResponseBuilder {
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head: Some(msg),
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err: None,
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}
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}
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}
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impl Future for ResponseBuilder {
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type Output = Result<Response<Body>, Error>;
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fn poll(mut self: Pin<&mut Self>, _: &mut Context<'_>) -> Poll<Self::Output> {
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Poll::Ready(Ok(self.finish()))
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}
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}
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impl fmt::Debug for ResponseBuilder {
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fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
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let head = self.head.as_ref().unwrap();
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|
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let res = writeln!(
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f,
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"\nResponseBuilder {:?} {}{}",
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head.version,
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head.status,
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head.reason.unwrap_or(""),
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);
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let _ = writeln!(f, " headers:");
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for (key, val) in head.headers.iter() {
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let _ = writeln!(f, " {:?}: {:?}", key, val);
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}
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res
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}
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}
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/// Helper converters
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impl<I: Into<Response<Body>>, E: Into<Error>> From<Result<I, E>> for Response<Body> {
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fn from(res: Result<I, E>) -> Self {
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match res {
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Ok(val) => val.into(),
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Err(err) => err.into().into(),
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}
|
|
}
|
|
}
|
|
|
|
impl From<ResponseBuilder> for Response<Body> {
|
|
fn from(mut builder: ResponseBuilder) -> Self {
|
|
builder.finish()
|
|
}
|
|
}
|
|
|
|
impl From<&'static str> for Response<Body> {
|
|
fn from(val: &'static str) -> Self {
|
|
Response::build(StatusCode::OK)
|
|
.content_type(mime::TEXT_PLAIN_UTF_8)
|
|
.body(val)
|
|
}
|
|
}
|
|
|
|
impl From<&'static [u8]> for Response<Body> {
|
|
fn from(val: &'static [u8]) -> Self {
|
|
Response::build(StatusCode::OK)
|
|
.content_type(mime::APPLICATION_OCTET_STREAM)
|
|
.body(val)
|
|
}
|
|
}
|
|
|
|
impl From<String> for Response<Body> {
|
|
fn from(val: String) -> Self {
|
|
Response::build(StatusCode::OK)
|
|
.content_type(mime::TEXT_PLAIN_UTF_8)
|
|
.body(val)
|
|
}
|
|
}
|
|
|
|
impl<'a> From<&'a String> for Response<Body> {
|
|
fn from(val: &'a String) -> Self {
|
|
Response::build(StatusCode::OK)
|
|
.content_type(mime::TEXT_PLAIN_UTF_8)
|
|
.body(val)
|
|
}
|
|
}
|
|
|
|
impl From<Bytes> for Response<Body> {
|
|
fn from(val: Bytes) -> Self {
|
|
Response::build(StatusCode::OK)
|
|
.content_type(mime::APPLICATION_OCTET_STREAM)
|
|
.body(val)
|
|
}
|
|
}
|
|
|
|
impl From<BytesMut> for Response<Body> {
|
|
fn from(val: BytesMut) -> Self {
|
|
Response::build(StatusCode::OK)
|
|
.content_type(mime::APPLICATION_OCTET_STREAM)
|
|
.body(val)
|
|
}
|
|
}
|
|
|
|
#[cfg(test)]
|
|
mod tests {
|
|
use super::*;
|
|
use crate::body::Body;
|
|
use crate::http::header::{HeaderName, HeaderValue, CONTENT_TYPE, COOKIE};
|
|
|
|
#[test]
|
|
fn test_debug() {
|
|
let resp = Response::build(StatusCode::OK)
|
|
.append_header((COOKIE, HeaderValue::from_static("cookie1=value1; ")))
|
|
.append_header((COOKIE, HeaderValue::from_static("cookie2=value2; ")))
|
|
.finish();
|
|
let dbg = format!("{:?}", resp);
|
|
assert!(dbg.contains("Response"));
|
|
}
|
|
|
|
#[test]
|
|
fn test_basic_builder() {
|
|
let resp = Response::build(StatusCode::OK)
|
|
.insert_header(("X-TEST", "value"))
|
|
.finish();
|
|
assert_eq!(resp.status(), StatusCode::OK);
|
|
}
|
|
|
|
#[test]
|
|
fn test_upgrade() {
|
|
let resp = Response::build(StatusCode::OK)
|
|
.upgrade("websocket")
|
|
.finish();
|
|
assert!(resp.upgrade());
|
|
assert_eq!(
|
|
resp.headers().get(header::UPGRADE).unwrap(),
|
|
HeaderValue::from_static("websocket")
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn test_force_close() {
|
|
let resp = Response::build(StatusCode::OK).force_close().finish();
|
|
assert!(!resp.keep_alive())
|
|
}
|
|
|
|
#[test]
|
|
fn test_content_type() {
|
|
let resp = Response::build(StatusCode::OK)
|
|
.content_type("text/plain")
|
|
.body(Body::Empty);
|
|
assert_eq!(resp.headers().get(CONTENT_TYPE).unwrap(), "text/plain")
|
|
}
|
|
|
|
#[test]
|
|
fn test_into_response() {
|
|
let resp: Response<Body> = "test".into();
|
|
assert_eq!(resp.status(), StatusCode::OK);
|
|
assert_eq!(
|
|
resp.headers().get(CONTENT_TYPE).unwrap(),
|
|
HeaderValue::from_static("text/plain; charset=utf-8")
|
|
);
|
|
assert_eq!(resp.status(), StatusCode::OK);
|
|
assert_eq!(resp.body().get_ref(), b"test");
|
|
|
|
let resp: Response<Body> = b"test".as_ref().into();
|
|
assert_eq!(resp.status(), StatusCode::OK);
|
|
assert_eq!(
|
|
resp.headers().get(CONTENT_TYPE).unwrap(),
|
|
HeaderValue::from_static("application/octet-stream")
|
|
);
|
|
assert_eq!(resp.status(), StatusCode::OK);
|
|
assert_eq!(resp.body().get_ref(), b"test");
|
|
|
|
let resp: Response<Body> = "test".to_owned().into();
|
|
assert_eq!(resp.status(), StatusCode::OK);
|
|
assert_eq!(
|
|
resp.headers().get(CONTENT_TYPE).unwrap(),
|
|
HeaderValue::from_static("text/plain; charset=utf-8")
|
|
);
|
|
assert_eq!(resp.status(), StatusCode::OK);
|
|
assert_eq!(resp.body().get_ref(), b"test");
|
|
|
|
let resp: Response<Body> = (&"test".to_owned()).into();
|
|
assert_eq!(resp.status(), StatusCode::OK);
|
|
assert_eq!(
|
|
resp.headers().get(CONTENT_TYPE).unwrap(),
|
|
HeaderValue::from_static("text/plain; charset=utf-8")
|
|
);
|
|
assert_eq!(resp.status(), StatusCode::OK);
|
|
assert_eq!(resp.body().get_ref(), b"test");
|
|
|
|
let b = Bytes::from_static(b"test");
|
|
let resp: Response<Body> = b.into();
|
|
assert_eq!(resp.status(), StatusCode::OK);
|
|
assert_eq!(
|
|
resp.headers().get(CONTENT_TYPE).unwrap(),
|
|
HeaderValue::from_static("application/octet-stream")
|
|
);
|
|
assert_eq!(resp.status(), StatusCode::OK);
|
|
assert_eq!(resp.body().get_ref(), b"test");
|
|
|
|
let b = Bytes::from_static(b"test");
|
|
let resp: Response<Body> = b.into();
|
|
assert_eq!(resp.status(), StatusCode::OK);
|
|
assert_eq!(
|
|
resp.headers().get(CONTENT_TYPE).unwrap(),
|
|
HeaderValue::from_static("application/octet-stream")
|
|
);
|
|
assert_eq!(resp.status(), StatusCode::OK);
|
|
assert_eq!(resp.body().get_ref(), b"test");
|
|
|
|
let b = BytesMut::from("test");
|
|
let resp: Response<Body> = b.into();
|
|
assert_eq!(resp.status(), StatusCode::OK);
|
|
assert_eq!(
|
|
resp.headers().get(CONTENT_TYPE).unwrap(),
|
|
HeaderValue::from_static("application/octet-stream")
|
|
);
|
|
|
|
assert_eq!(resp.status(), StatusCode::OK);
|
|
assert_eq!(resp.body().get_ref(), b"test");
|
|
}
|
|
|
|
#[test]
|
|
fn test_into_builder() {
|
|
let mut resp: Response<Body> = "test".into();
|
|
assert_eq!(resp.status(), StatusCode::OK);
|
|
|
|
resp.headers_mut().insert(
|
|
HeaderName::from_static("cookie"),
|
|
HeaderValue::from_static("cookie1=val100"),
|
|
);
|
|
|
|
let mut builder: ResponseBuilder = resp.into();
|
|
let resp = builder.status(StatusCode::BAD_REQUEST).finish();
|
|
assert_eq!(resp.status(), StatusCode::BAD_REQUEST);
|
|
|
|
let cookie = resp.headers().get_all("Cookie").next().unwrap();
|
|
assert_eq!(cookie.to_str().unwrap(), "cookie1=val100");
|
|
}
|
|
|
|
#[test]
|
|
fn response_builder_header_insert_kv() {
|
|
let mut res = Response::build(StatusCode::OK);
|
|
res.insert_header(("Content-Type", "application/octet-stream"));
|
|
let res = res.finish();
|
|
|
|
assert_eq!(
|
|
res.headers().get("Content-Type"),
|
|
Some(&HeaderValue::from_static("application/octet-stream"))
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn response_builder_header_insert_typed() {
|
|
let mut res = Response::build(StatusCode::OK);
|
|
res.insert_header((header::CONTENT_TYPE, mime::APPLICATION_OCTET_STREAM));
|
|
let res = res.finish();
|
|
|
|
assert_eq!(
|
|
res.headers().get("Content-Type"),
|
|
Some(&HeaderValue::from_static("application/octet-stream"))
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn response_builder_header_append_kv() {
|
|
let mut res = Response::build(StatusCode::OK);
|
|
res.append_header(("Content-Type", "application/octet-stream"));
|
|
res.append_header(("Content-Type", "application/json"));
|
|
let res = res.finish();
|
|
|
|
let headers: Vec<_> = res.headers().get_all("Content-Type").cloned().collect();
|
|
assert_eq!(headers.len(), 2);
|
|
assert!(headers.contains(&HeaderValue::from_static("application/octet-stream")));
|
|
assert!(headers.contains(&HeaderValue::from_static("application/json")));
|
|
}
|
|
|
|
#[test]
|
|
fn response_builder_header_append_typed() {
|
|
let mut res = Response::build(StatusCode::OK);
|
|
res.append_header((header::CONTENT_TYPE, mime::APPLICATION_OCTET_STREAM));
|
|
res.append_header((header::CONTENT_TYPE, mime::APPLICATION_JSON));
|
|
let res = res.finish();
|
|
|
|
let headers: Vec<_> = res.headers().get_all("Content-Type").cloned().collect();
|
|
assert_eq!(headers.len(), 2);
|
|
assert!(headers.contains(&HeaderValue::from_static("application/octet-stream")));
|
|
assert!(headers.contains(&HeaderValue::from_static("application/json")));
|
|
}
|
|
}
|