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use std::{io, mem, str};
use std::error::Error as Error;
use std::convert::Into;
use cookie::CookieJar;
use http::{StatusCode, Version, HeaderMap, HttpTryFrom, Error as HttpError};
use http::header::{self, HeaderName, HeaderValue};
use Cookie;
use body::Body;
#[derive(Copy, Clone, PartialEq, Debug)]
pub enum ConnectionType {
Close,
KeepAlive,
Upgrade,
}
#[derive(Debug)]
pub struct HttpResponse {
pub version: Option<Version>,
pub headers: HeaderMap,
pub status: StatusCode,
reason: Option<&'static str>,
body: Body,
chunked: bool,
connection_type: Option<ConnectionType>,
error: Option<Box<Error>>,
}
impl HttpResponse {
#[inline]
pub fn builder(status: StatusCode) -> HttpResponseBuilder {
HttpResponseBuilder {
parts: Some(Parts::new(status)),
err: None,
}
}
#[inline]
pub fn new(status: StatusCode, body: Body) -> HttpResponse {
HttpResponse {
version: None,
headers: Default::default(),
status: status,
reason: None,
body: body,
chunked: false,
connection_type: None,
error: None,
}
}
#[inline]
pub fn from_error<E: Error + 'static>(status: StatusCode, error: E) -> HttpResponse {
HttpResponse {
version: None,
headers: Default::default(),
status: status,
reason: None,
body: Body::from_slice(error.description().as_ref()),
chunked: false,
connection_type: None,
error: Some(Box::new(error)),
}
}
#[inline]
#[cfg_attr(feature="cargo-clippy", allow(borrowed_box))]
pub fn error(&self) -> Option<&Box<Error>> {
self.error.as_ref()
}
#[inline]
pub fn version(&self) -> Option<Version> {
self.version
}
#[inline]
pub fn headers(&self) -> &HeaderMap {
&self.headers
}
#[inline]
pub fn headers_mut(&mut self) -> &mut HeaderMap {
&mut self.headers
}
#[inline]
pub fn status(&self) -> StatusCode {
self.status
}
#[inline]
pub fn status_mut(&mut self) -> &mut StatusCode {
&mut self.status
}
#[inline]
pub fn reason(&self) -> &str {
if let Some(reason) = self.reason {
reason
} else {
""
}
}
#[inline]
pub fn set_reason(&mut self, reason: &'static str) -> &mut Self {
self.reason = Some(reason);
self
}
pub fn set_connection_type(&mut self, conn: ConnectionType) -> &mut Self {
self.connection_type = Some(conn);
self
}
pub fn upgrade(&self) -> bool {
self.connection_type == Some(ConnectionType::Upgrade)
}
pub fn keep_alive(&self) -> Option<bool> {
if let Some(ct) = self.connection_type {
match ct {
ConnectionType::KeepAlive => Some(true),
ConnectionType::Close | ConnectionType::Upgrade => Some(false),
}
} else {
None
}
}
pub fn chunked(&self) -> bool {
self.chunked
}
pub fn enable_chunked_encoding(&mut self) -> Result<(), io::Error> {
if self.headers.contains_key(header::CONTENT_LENGTH) {
Err(io::Error::new(io::ErrorKind::Other,
"You can't enable chunked encoding when a content length is set"))
} else {
self.chunked = true;
Ok(())
}
}
pub fn body(&self) -> &Body {
&self.body
}
pub fn set_body<B: Into<Body>>(&mut self, body: B) {
self.body = body.into();
}
pub fn replace_body<B: Into<Body>>(&mut self, body: B) -> Body {
mem::replace(&mut self.body, body.into())
}
}
impl<I: Into<HttpResponse>, E: Into<HttpResponse>> From<Result<I, E>> for HttpResponse {
fn from(res: Result<I, E>) -> Self {
match res {
Ok(val) => val.into(),
Err(err) => err.into(),
}
}
}
#[derive(Debug)]
struct Parts {
version: Option<Version>,
headers: HeaderMap,
status: StatusCode,
reason: Option<&'static str>,
chunked: bool,
connection_type: Option<ConnectionType>,
cookies: CookieJar,
}
impl Parts {
fn new(status: StatusCode) -> Self {
Parts {
version: None,
headers: HeaderMap::new(),
status: status,
reason: None,
chunked: false,
connection_type: None,
cookies: CookieJar::new(),
}
}
}
#[derive(Debug)]
pub struct HttpResponseBuilder {
parts: Option<Parts>,
err: Option<HttpError>,
}
impl HttpResponseBuilder {
#[inline]
pub fn version(&mut self, version: Version) -> &mut Self {
if let Some(parts) = parts(&mut self.parts, &self.err) {
parts.version = Some(version);
}
self
}
#[inline]
pub fn status(&mut self, status: StatusCode) -> &mut Self {
if let Some(parts) = parts(&mut self.parts, &self.err) {
parts.status = status;
}
self
}
#[inline]
pub fn header<K, V>(&mut self, key: K, value: V) -> &mut Self
where HeaderName: HttpTryFrom<K>,
HeaderValue: HttpTryFrom<V>
{
if let Some(parts) = parts(&mut self.parts, &self.err) {
match HeaderName::try_from(key) {
Ok(key) => {
match HeaderValue::try_from(value) {
Ok(value) => { parts.headers.append(key, value); }
Err(e) => self.err = Some(e.into()),
}
},
Err(e) => self.err = Some(e.into()),
};
}
self
}
#[inline]
pub fn reason(&mut self, reason: &'static str) -> &mut Self {
if let Some(parts) = parts(&mut self.parts, &self.err) {
parts.reason = Some(reason);
}
self
}
pub fn connection_type(&mut self, conn: ConnectionType) -> &mut Self {
if let Some(parts) = parts(&mut self.parts, &self.err) {
parts.connection_type = Some(conn);
}
self
}
pub fn upgrade(&mut self) -> &mut Self {
self.connection_type(ConnectionType::Upgrade)
}
pub fn force_close(&mut self) -> &mut Self {
self.connection_type(ConnectionType::Close)
}
pub fn enable_chunked(&mut self) -> &mut Self {
if let Some(parts) = parts(&mut self.parts, &self.err) {
parts.chunked = true;
}
self
}
pub fn content_type<V>(&mut self, value: V) -> &mut Self
where HeaderValue: HttpTryFrom<V>
{
if let Some(parts) = parts(&mut self.parts, &self.err) {
match HeaderValue::try_from(value) {
Ok(value) => { parts.headers.insert(header::CONTENT_TYPE, value); },
Err(e) => self.err = Some(e.into()),
};
}
self
}
pub fn cookie<'c>(&mut self, cookie: Cookie<'c>) -> &mut Self {
if let Some(parts) = parts(&mut self.parts, &self.err) {
parts.cookies.add(cookie.into_owned());
}
self
}
pub fn del_cookie<'a>(&mut self, cookie: &Cookie<'a>) -> &mut Self {
if let Some(parts) = parts(&mut self.parts, &self.err) {
let cookie = cookie.clone().into_owned();
parts.cookies.add_original(cookie.clone());
parts.cookies.remove(cookie);
}
self
}
pub fn if_true<F>(&mut self, value: bool, f: F) -> &mut Self
where F: Fn(&mut HttpResponseBuilder) + 'static
{
if value {
f(self);
}
self
}
pub fn body<B: Into<Body>>(&mut self, body: B) -> Result<HttpResponse, HttpError> {
let mut parts = self.parts.take().expect("cannot reuse response builder");
if let Some(e) = self.err.take() {
return Err(e)
}
for cookie in parts.cookies.delta() {
parts.headers.append(
header::SET_COOKIE,
HeaderValue::from_str(&cookie.to_string())?);
}
Ok(HttpResponse {
version: parts.version,
headers: parts.headers,
status: parts.status,
reason: parts.reason,
body: body.into(),
chunked: parts.chunked,
connection_type: parts.connection_type,
error: None,
})
}
pub fn finish(&mut self) -> Result<HttpResponse, HttpError> {
self.body(Body::Empty)
}
}
fn parts<'a>(parts: &'a mut Option<Parts>, err: &Option<HttpError>) -> Option<&'a mut Parts>
{
if err.is_some() {
return None
}
parts.as_mut()
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn test_body() {
assert!(Body::Length(10).has_body());
assert!(Body::Streaming.has_body());
}
#[test]
fn test_upgrade() {
let resp = HttpResponse::builder(StatusCode::OK)
.upgrade().body(Body::Empty).unwrap();
assert!(resp.upgrade())
}
#[test]
fn test_force_close() {
let resp = HttpResponse::builder(StatusCode::OK)
.force_close().body(Body::Empty).unwrap();
assert!(!resp.keep_alive().unwrap())
}
#[test]
fn test_content_type() {
let resp = HttpResponse::builder(StatusCode::OK)
.content_type("text/plain").body(Body::Empty).unwrap();
assert_eq!(resp.headers().get(header::CONTENT_TYPE).unwrap(), "text/plain")
}
}