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actix-web/actix-http/src/response.rs
2021-04-09 18:07:10 +01:00

927 lines
26 KiB
Rust

//! HTTP responses.
use std::{
cell::{Ref, RefMut},
convert::TryInto,
fmt,
future::Future,
pin::Pin,
str,
task::{Context, Poll},
};
use bytes::{Bytes, BytesMut};
use futures_core::Stream;
use serde::Serialize;
use crate::{
body::{Body, BodyStream, MessageBody, ResponseBody},
error::Error,
extensions::Extensions,
header::{IntoHeaderPair, IntoHeaderValue},
http::{
header::{self, HeaderName},
Error as HttpError, HeaderMap, StatusCode,
},
message::{BoxedResponseHead, ConnectionType, ResponseHead},
};
/// An HTTP Response
pub struct Response<B = Body> {
head: BoxedResponseHead,
body: ResponseBody<B>,
error: Option<Error>,
}
impl Response<Body> {
/// Create HTTP response builder with specific status.
#[inline]
pub fn build(status: StatusCode) -> ResponseBuilder {
ResponseBuilder::new(status)
}
/// Create HTTP response builder
#[inline]
pub fn build_from<T: Into<ResponseBuilder>>(source: T) -> ResponseBuilder {
source.into()
}
/// Constructs a response
#[inline]
pub fn new(status: StatusCode) -> Response {
Response {
head: BoxedResponseHead::new(status),
body: ResponseBody::Body(Body::Empty),
error: None,
}
}
/// Constructs an error response
#[inline]
pub fn from_error(error: Error) -> Response {
let mut resp = error.as_response_error().error_response();
if resp.head.status == StatusCode::INTERNAL_SERVER_ERROR {
error!("Internal Server Error: {:?}", error);
}
resp.error = Some(error);
resp
}
/// Convert response to response with body
pub fn into_body<B>(self) -> Response<B> {
let b = match self.body {
ResponseBody::Body(b) => b,
ResponseBody::Other(b) => b,
};
Response {
head: self.head,
error: self.error,
body: ResponseBody::Other(b),
}
}
}
impl<B> Response<B> {
/// Constructs a response with body
#[inline]
pub fn with_body(status: StatusCode, body: B) -> Response<B> {
Response {
head: BoxedResponseHead::new(status),
body: ResponseBody::Body(body),
error: None,
}
}
#[inline]
/// Http message part of the response
pub fn head(&self) -> &ResponseHead {
&*self.head
}
#[inline]
/// Mutable reference to a HTTP message part of the response
pub fn head_mut(&mut self) -> &mut ResponseHead {
&mut *self.head
}
/// The source `error` for this response
#[inline]
pub fn error(&self) -> Option<&Error> {
self.error.as_ref()
}
/// Get the response status code
#[inline]
pub fn status(&self) -> StatusCode {
self.head.status
}
/// Set the `StatusCode` for this response
#[inline]
pub fn status_mut(&mut self) -> &mut StatusCode {
&mut self.head.status
}
/// Get the headers from the response
#[inline]
pub fn headers(&self) -> &HeaderMap {
&self.head.headers
}
/// Get a mutable reference to the headers
#[inline]
pub fn headers_mut(&mut self) -> &mut HeaderMap {
&mut self.head.headers
}
/// Connection upgrade status
#[inline]
pub fn upgrade(&self) -> bool {
self.head.upgrade()
}
/// Keep-alive status for this connection
pub fn keep_alive(&self) -> bool {
self.head.keep_alive()
}
/// Responses extensions
#[inline]
pub fn extensions(&self) -> Ref<'_, Extensions> {
self.head.extensions.borrow()
}
/// Mutable reference to a the response's extensions
#[inline]
pub fn extensions_mut(&mut self) -> RefMut<'_, Extensions> {
self.head.extensions.borrow_mut()
}
/// Get body of this response
#[inline]
pub fn body(&self) -> &ResponseBody<B> {
&self.body
}
/// Set a body
pub fn set_body<B2>(self, body: B2) -> Response<B2> {
Response {
head: self.head,
body: ResponseBody::Body(body),
error: None,
}
}
/// Split response and body
pub fn into_parts(self) -> (Response<()>, ResponseBody<B>) {
(
Response {
head: self.head,
body: ResponseBody::Body(()),
error: self.error,
},
self.body,
)
}
/// Drop request's body
pub fn drop_body(self) -> Response<()> {
Response {
head: self.head,
body: ResponseBody::Body(()),
error: None,
}
}
/// Set a body and return previous body value
pub(crate) fn replace_body<B2>(self, body: B2) -> (Response<B2>, ResponseBody<B>) {
(
Response {
head: self.head,
body: ResponseBody::Body(body),
error: self.error,
},
self.body,
)
}
/// Set a body and return previous body value
pub fn map_body<F, B2>(mut self, f: F) -> Response<B2>
where
F: FnOnce(&mut ResponseHead, ResponseBody<B>) -> ResponseBody<B2>,
{
let body = f(&mut self.head, self.body);
Response {
body,
head: self.head,
error: self.error,
}
}
/// Extract response body
pub fn take_body(&mut self) -> ResponseBody<B> {
self.body.take_body()
}
}
impl<B: MessageBody> fmt::Debug for Response<B> {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
let res = writeln!(
f,
"\nResponse {:?} {}{}",
self.head.version,
self.head.status,
self.head.reason.unwrap_or(""),
);
let _ = writeln!(f, " headers:");
for (key, val) in self.head.headers.iter() {
let _ = writeln!(f, " {:?}: {:?}", key, val);
}
let _ = writeln!(f, " body: {:?}", self.body.size());
res
}
}
impl Future for Response {
type Output = Result<Response, Error>;
fn poll(mut self: Pin<&mut Self>, _: &mut Context<'_>) -> Poll<Self::Output> {
Poll::Ready(Ok(Response {
head: self.head.take(),
body: self.body.take_body(),
error: self.error.take(),
}))
}
}
/// An HTTP response builder.
///
/// This type can be used to construct an instance of `Response` through a builder-like pattern.
pub struct ResponseBuilder {
head: Option<BoxedResponseHead>,
err: Option<HttpError>,
}
impl ResponseBuilder {
#[inline]
/// Create response builder
pub fn new(status: StatusCode) -> Self {
ResponseBuilder {
head: Some(BoxedResponseHead::new(status)),
err: None,
}
}
/// Set HTTP status code of this response.
#[inline]
pub fn status(&mut self, status: StatusCode) -> &mut Self {
if let Some(parts) = parts(&mut self.head, &self.err) {
parts.status = status;
}
self
}
/// Insert a header, replacing any that were set with an equivalent field name.
///
/// ```
/// # use actix_http::Response;
/// use actix_http::http::header;
///
/// Response::Ok()
/// .insert_header((header::CONTENT_TYPE, mime::APPLICATION_JSON))
/// .insert_header(("X-TEST", "value"))
/// .finish();
/// ```
pub fn insert_header<H>(&mut self, header: H) -> &mut Self
where
H: IntoHeaderPair,
{
if let Some(parts) = parts(&mut self.head, &self.err) {
match header.try_into_header_pair() {
Ok((key, value)) => {
parts.headers.insert(key, value);
}
Err(e) => self.err = Some(e.into()),
};
}
self
}
/// Append a header, keeping any that were set with an equivalent field name.
///
/// ```
/// # use actix_http::Response;
/// use actix_http::http::header;
///
/// Response::Ok()
/// .append_header((header::CONTENT_TYPE, mime::APPLICATION_JSON))
/// .append_header(("X-TEST", "value1"))
/// .append_header(("X-TEST", "value2"))
/// .finish();
/// ```
pub fn append_header<H>(&mut self, header: H) -> &mut Self
where
H: IntoHeaderPair,
{
if let Some(parts) = parts(&mut self.head, &self.err) {
match header.try_into_header_pair() {
Ok((key, value)) => parts.headers.append(key, value),
Err(e) => self.err = Some(e.into()),
};
}
self
}
/// Replaced with [`Self::insert_header()`].
#[deprecated(
since = "4.0.0",
note = "Replaced with `insert_header((key, value))`. Will be removed in v5."
)]
pub fn set_header<K, V>(&mut self, key: K, value: V) -> &mut Self
where
K: TryInto<HeaderName>,
K::Error: Into<HttpError>,
V: IntoHeaderValue,
{
if self.err.is_some() {
return self;
}
match (key.try_into(), value.try_into_value()) {
(Ok(name), Ok(value)) => return self.insert_header((name, value)),
(Err(err), _) => self.err = Some(err.into()),
(_, Err(err)) => self.err = Some(err.into()),
}
self
}
/// Replaced with [`Self::append_header()`].
#[deprecated(
since = "4.0.0",
note = "Replaced with `append_header((key, value))`. Will be removed in v5."
)]
pub fn header<K, V>(&mut self, key: K, value: V) -> &mut Self
where
K: TryInto<HeaderName>,
K::Error: Into<HttpError>,
V: IntoHeaderValue,
{
if self.err.is_some() {
return self;
}
match (key.try_into(), value.try_into_value()) {
(Ok(name), Ok(value)) => return self.append_header((name, value)),
(Err(err), _) => self.err = Some(err.into()),
(_, Err(err)) => self.err = Some(err.into()),
}
self
}
/// Set the custom reason for the response.
#[inline]
pub fn reason(&mut self, reason: &'static str) -> &mut Self {
if let Some(parts) = parts(&mut self.head, &self.err) {
parts.reason = Some(reason);
}
self
}
/// Set connection type to KeepAlive
#[inline]
pub fn keep_alive(&mut self) -> &mut Self {
if let Some(parts) = parts(&mut self.head, &self.err) {
parts.set_connection_type(ConnectionType::KeepAlive);
}
self
}
/// Set connection type to Upgrade
#[inline]
pub fn upgrade<V>(&mut self, value: V) -> &mut Self
where
V: IntoHeaderValue,
{
if let Some(parts) = parts(&mut self.head, &self.err) {
parts.set_connection_type(ConnectionType::Upgrade);
}
if let Ok(value) = value.try_into_value() {
self.insert_header((header::UPGRADE, value));
}
self
}
/// Force close connection, even if it is marked as keep-alive
#[inline]
pub fn force_close(&mut self) -> &mut Self {
if let Some(parts) = parts(&mut self.head, &self.err) {
parts.set_connection_type(ConnectionType::Close);
}
self
}
/// Disable chunked transfer encoding for HTTP/1.1 streaming responses.
#[inline]
pub fn no_chunking(&mut self, len: u64) -> &mut Self {
let mut buf = itoa::Buffer::new();
self.insert_header((header::CONTENT_LENGTH, buf.format(len)));
if let Some(parts) = parts(&mut self.head, &self.err) {
parts.no_chunking(true);
}
self
}
/// Set response content type.
#[inline]
pub fn content_type<V>(&mut self, value: V) -> &mut Self
where
V: IntoHeaderValue,
{
if let Some(parts) = parts(&mut self.head, &self.err) {
match value.try_into_value() {
Ok(value) => {
parts.headers.insert(header::CONTENT_TYPE, value);
}
Err(e) => self.err = Some(e.into()),
};
}
self
}
/// This method calls provided closure with builder reference if value is `true`.
#[doc(hidden)]
#[deprecated = "Use an if statement."]
pub fn if_true<F>(&mut self, value: bool, f: F) -> &mut Self
where
F: FnOnce(&mut ResponseBuilder),
{
if value {
f(self);
}
self
}
/// This method calls provided closure with builder reference if value is `Some`.
#[doc(hidden)]
#[deprecated = "Use an if-let construction."]
pub fn if_some<T, F>(&mut self, value: Option<T>, f: F) -> &mut Self
where
F: FnOnce(T, &mut ResponseBuilder),
{
if let Some(val) = value {
f(val, self);
}
self
}
/// Responses extensions
#[inline]
pub fn extensions(&self) -> Ref<'_, Extensions> {
let head = self.head.as_ref().expect("cannot reuse response builder");
head.extensions.borrow()
}
/// Mutable reference to a the response's extensions
#[inline]
pub fn extensions_mut(&mut self) -> RefMut<'_, Extensions> {
let head = self.head.as_ref().expect("cannot reuse response builder");
head.extensions.borrow_mut()
}
#[inline]
/// Set a body and generate `Response`.
///
/// `ResponseBuilder` can not be used after this call.
pub fn body<B: Into<Body>>(&mut self, body: B) -> Response {
self.message_body(body.into())
}
/// Set a body and generate `Response`.
///
/// `ResponseBuilder` can not be used after this call.
pub fn message_body<B>(&mut self, body: B) -> Response<B> {
if let Some(e) = self.err.take() {
return Response::from(Error::from(e)).into_body();
}
let response = self.head.take().expect("cannot reuse response builder");
Response {
head: response,
body: ResponseBody::Body(body),
error: None,
}
}
#[inline]
/// Set a streaming body and generate `Response`.
///
/// `ResponseBuilder` can not be used after this call.
pub fn streaming<S, E>(&mut self, stream: S) -> Response
where
S: Stream<Item = Result<Bytes, E>> + Unpin + 'static,
E: Into<Error> + 'static,
{
self.body(Body::from_message(BodyStream::new(stream)))
}
/// Set a json body and generate `Response`
///
/// `ResponseBuilder` can not be used after this call.
pub fn json(&mut self, value: impl Serialize) -> Response {
match serde_json::to_string(&value) {
Ok(body) => {
let contains = if let Some(parts) = parts(&mut self.head, &self.err) {
parts.headers.contains_key(header::CONTENT_TYPE)
} else {
true
};
if !contains {
self.insert_header((header::CONTENT_TYPE, mime::APPLICATION_JSON));
}
self.body(Body::from(body))
}
Err(e) => Error::from(e).into(),
}
}
#[inline]
/// Set an empty body and generate `Response`
///
/// `ResponseBuilder` can not be used after this call.
pub fn finish(&mut self) -> Response {
self.body(Body::Empty)
}
/// This method construct new `ResponseBuilder`
pub fn take(&mut self) -> ResponseBuilder {
ResponseBuilder {
head: self.head.take(),
err: self.err.take(),
}
}
}
#[inline]
fn parts<'a>(
parts: &'a mut Option<BoxedResponseHead>,
err: &Option<HttpError>,
) -> Option<&'a mut ResponseHead> {
if err.is_some() {
return None;
}
parts.as_mut().map(|r| &mut **r)
}
/// Convert `Response` to a `ResponseBuilder`. Body get dropped.
impl<B> From<Response<B>> for ResponseBuilder {
fn from(res: Response<B>) -> ResponseBuilder {
ResponseBuilder {
head: Some(res.head),
err: None,
}
}
}
/// Convert `ResponseHead` to a `ResponseBuilder`
impl<'a> From<&'a ResponseHead> for ResponseBuilder {
fn from(head: &'a ResponseHead) -> ResponseBuilder {
let mut msg = BoxedResponseHead::new(head.status);
msg.version = head.version;
msg.reason = head.reason;
for (k, v) in head.headers.iter() {
msg.headers.append(k.clone(), v.clone());
}
msg.no_chunking(!head.chunked());
ResponseBuilder {
head: Some(msg),
err: None,
}
}
}
impl Future for ResponseBuilder {
type Output = Result<Response, Error>;
fn poll(mut self: Pin<&mut Self>, _: &mut Context<'_>) -> Poll<Self::Output> {
Poll::Ready(Ok(self.finish()))
}
}
impl fmt::Debug for ResponseBuilder {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
let head = self.head.as_ref().unwrap();
let res = writeln!(
f,
"\nResponseBuilder {:?} {}{}",
head.version,
head.status,
head.reason.unwrap_or(""),
);
let _ = writeln!(f, " headers:");
for (key, val) in head.headers.iter() {
let _ = writeln!(f, " {:?}: {:?}", key, val);
}
res
}
}
/// Helper converters
impl<I: Into<Response>, E: Into<Error>> From<Result<I, E>> for Response {
fn from(res: Result<I, E>) -> Self {
match res {
Ok(val) => val.into(),
Err(err) => err.into().into(),
}
}
}
impl From<ResponseBuilder> for Response {
fn from(mut builder: ResponseBuilder) -> Self {
builder.finish()
}
}
impl From<&'static str> for Response {
fn from(val: &'static str) -> Self {
Response::Ok()
.content_type(mime::TEXT_PLAIN_UTF_8)
.body(val)
}
}
impl From<&'static [u8]> for Response {
fn from(val: &'static [u8]) -> Self {
Response::Ok()
.content_type(mime::APPLICATION_OCTET_STREAM)
.body(val)
}
}
impl From<String> for Response {
fn from(val: String) -> Self {
Response::Ok()
.content_type(mime::TEXT_PLAIN_UTF_8)
.body(val)
}
}
impl<'a> From<&'a String> for Response {
fn from(val: &'a String) -> Self {
Response::Ok()
.content_type(mime::TEXT_PLAIN_UTF_8)
.body(val)
}
}
impl From<Bytes> for Response {
fn from(val: Bytes) -> Self {
Response::Ok()
.content_type(mime::APPLICATION_OCTET_STREAM)
.body(val)
}
}
impl From<BytesMut> for Response {
fn from(val: BytesMut) -> Self {
Response::Ok()
.content_type(mime::APPLICATION_OCTET_STREAM)
.body(val)
}
}
#[cfg(test)]
mod tests {
use serde_json::json;
use super::*;
use crate::body::Body;
use crate::http::header::{HeaderValue, CONTENT_TYPE, COOKIE};
#[test]
fn test_debug() {
let resp = Response::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::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_json() {
let resp = Response::Ok().json(vec!["v1", "v2", "v3"]);
let ct = resp.headers().get(CONTENT_TYPE).unwrap();
assert_eq!(ct, HeaderValue::from_static("application/json"));
assert_eq!(resp.body().get_ref(), b"[\"v1\",\"v2\",\"v3\"]");
let resp = Response::Ok().json(&["v1", "v2", "v3"]);
let ct = resp.headers().get(CONTENT_TYPE).unwrap();
assert_eq!(ct, HeaderValue::from_static("application/json"));
assert_eq!(resp.body().get_ref(), b"[\"v1\",\"v2\",\"v3\"]");
}
#[test]
fn test_json_ct() {
let resp = Response::build(StatusCode::OK)
.insert_header((CONTENT_TYPE, "text/json"))
.json(&vec!["v1", "v2", "v3"]);
let ct = resp.headers().get(CONTENT_TYPE).unwrap();
assert_eq!(ct, HeaderValue::from_static("text/json"));
assert_eq!(resp.body().get_ref(), b"[\"v1\",\"v2\",\"v3\"]");
}
#[test]
fn test_serde_json_in_body() {
use serde_json::json;
let resp =
Response::build(StatusCode::OK).body(json!({"test-key":"test-value"}));
assert_eq!(resp.body().get_ref(), br#"{"test-key":"test-value"}"#);
}
#[test]
fn test_into_response() {
let resp: Response = "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 = 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 = "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 = (&"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 = 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 = 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 = 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 = "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::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::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::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::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")));
}
}