Struct Response 

pub struct Response {
    pub http_version: String,
    pub status_code: i16,
    pub reason_phrase: String,
    pub headers: Vec<Header>,
    pub content_range_list: Vec<ContentRange>,
    pub stream_file: Option<String>,
    pub stream_pipe: Option<Box<dyn Read + Send>>,
    pub trailers: Option<Trailers>,
}

An HTTP response. Build one inside [Controller::process] and return it.

Set status_code and reason_phrase from STATUS_CODE_REASON_PHRASE, push body content via Range::get_content_range into content_range_list, and add any extra headers to headers.

For large files, set stream_file to the absolute file path instead of loading the body into content_range_list. The server will stream it with Transfer-Encoding: chunked so memory usage stays constant regardless of file size.

For proxy passthrough (SSE, AI token streams, large downloads), set stream_pipe to a boxed Read source instead. The server streams its output with Transfer-Encoding: chunked immediately after sending the response headers.

Fields

http_version: String

HTTP version string, e.g. "HTTP/1.1".

status_code: i16

Numeric status code, e.g. 200. Set from STATUS_CODE_REASON_PHRASE.

reason_phrase: String

Reason phrase, e.g. "OK". Set from STATUS_CODE_REASON_PHRASE.

headers: Vec<Header>

Response headers. Pre-populated with standard headers by Header::get_header_list.

content_range_list: Vec<ContentRange>

Response body as a list of content ranges (supports multipart and range responses).

stream_file: Option<String>

If set, the server streams this file with Transfer-Encoding: chunked instead of using content_range_list. Use for files larger than ~8 MB.

stream_pipe: Option<Box<dyn Read + Send>>

If set, the server pipes bytes from this reader with Transfer-Encoding: chunked immediately after sending the response headers. Takes precedence over content_range_list and stream_file. The reader is consumed and not cloned.

trailers: Option<Trailers>

Header fields sent after the body (HTTP/2 and HTTP/3; HTTP/1.1 drops them) — gRPC’s grpc-status and grpc-message. A streamed body’s producer fills the slot before it ends the stream. Since 18.3.0.

Implementations

impl Response

pub const _ERROR_UNABLE_TO_PARSE_HTTP_VERSION_STATUS_CODE: &'static str = "Unable to parse status code"

pub const _HTTP_VERSION_AND_STATUS_CODE_AND_REASON_PHRASE_REGEX: &'static str = "(?P<http_version>\\w+/\\w+.\\w)\\s(?P<status_code>\\w+)\\s(?P<reason_phrase>.+)"

pub fn with_status(status: &StatusCodeReasonPhrase) -> Response

A response with status, no headers and no body; set fields or push headers and body parts after.

use rust_web_server::response::{Response, STATUS_CODE_REASON_PHRASE};

let mut response = Response::with_status(STATUS_CODE_REASON_PHRASE.n204_no_content);
response.headers.push(rust_web_server::header::Header::new("X-Done", "yes"));
assert_eq!(response.status_code, 204);

pub fn build( status: StatusCodeReasonPhrase, header_list: Vec<Header>, body: Vec<ContentRange>, ) -> Response

pub fn status_code_reason_phrase_list() -> Vec<&'static StatusCodeReasonPhrase>

pub fn _get_header(&self, name: String) -> Option<&Header>

pub fn status_has_no_content(status_code: i16) -> bool

true for a status that never has content: 1xx, 204, 304 (RFC 9110 §6.4.1, §15.3.5, §15.4.5).

pub fn drop_content_for_status(&mut self)

For a status without content (Response::status_has_no_content), drop the body — buffered, file or pipe — and any Content-Length or Transfer-Encoding, which those responses must not carry (#54). Every connection writer calls it before framing the response.

pub fn generate_body(content_range_list: Vec<ContentRange>) -> Vec<u8>

pub fn generate_response(response: Response, request: Request) -> Vec<u8>

The serialized response: status line + headers, then the body.

pub fn generate_response_parts( response: Response, request: Request, ) -> (Vec<u8>, Vec<u8>)

Like generate_response, but returns the head (status line + headers + blank line) and the body separately, so a connection writer can send them back to back without first copying a large body into one combined buffer. The body is empty for HEAD and for a status without content.

pub fn _parse_response(response_vec_u8: &[u8]) -> Response

pub fn _parse_http_version_status_code_reason_phrase_string( http_version_status_code_reason_phrase: &str, ) -> Result<(String, i16, String), String>

pub fn _parse_http_response_header_string(header_string: &str) -> Header

pub fn _parse_raw_response_via_cursor( cursor: &mut Cursor<&[u8]>, iteration_number: usize, response: &mut Response, content_length: usize, )

pub fn _is_multipart_byteranges_content_type(content_type: &Header) -> bool

pub fn get_response( status_code_reason_phrase: &StatusCodeReasonPhrase, boxed_header_list: Option<Vec<Header>>, boxed_content_range_list: Option<Vec<ContentRange>>, ) -> Response

pub fn json( status_code_reason_phrase: &StatusCodeReasonPhrase, body: Vec<u8>, ) -> Response

Build a Content-Type: application/json response from already-serialized bytes.

Takes raw bytes rather than a Serialize value so it carries no dependency on the serde feature — pair it with serde_json::to_vec (or hand-rolled JSON) to build body. For a one-line serialize-and-respond helper on a typed value, see [crate::json::Json] (serde feature).

use rust_web_server::response::{Response, STATUS_CODE_REASON_PHRASE};

let response = Response::json(STATUS_CODE_REASON_PHRASE.n200_ok, br#"{"ok":true}"#.to_vec());

pub fn text( status_code_reason_phrase: &StatusCodeReasonPhrase, body: &str, ) -> Response

Build a Content-Type: text/plain response from a body string.

use rust_web_server::response::{Response, STATUS_CODE_REASON_PHRASE};

let response = Response::text(STATUS_CODE_REASON_PHRASE.n400_bad_request, "invalid input");

pub fn generate(&mut self) -> Vec<u8>

pub fn get_header(&self, name: String) -> Option<&Header>

pub fn header(&self, name: &str) -> Option<&Header>

The first header named name (case-insensitive), without allocating.

pub fn parse(response_vec_u8: &[u8]) -> Result<Response, String>

pub fn parse_raw_response_via_cursor( cursor: &mut Cursor<&[u8]>, iteration_number: usize, response: &mut Response, _content_length: usize, total_bytes: i32, bytes_read: i32, ) -> Result<(), String>

pub fn parse_http_response_header_string( header_string: &str, ) -> Result<Header, String>

Trait Implementations

impl Clone for Response

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Response

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for Response

fn default() -> Self

The same as Response::new(): HTTP/1.1, no headers, no body, status 501 Not Implemented until you set one.

impl Eq for Response

impl IntoResponse for Response

fn into_response(self) -> Response

impl New for Response

fn new() -> Self

impl PartialEq for Response

fn eq(&self, other: &Self) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.