pub struct Json<T>(pub T);
Expand description
JSON extractor and responder.
Json
has two uses: JSON responses, and extracting typed data from JSON request payloads.
§Extractor
To extract typed data from a request body, the inner type T
must implement the
serde::Deserialize
trait.
Use JsonConfig
to configure extraction options.
use actix_web::{post, web, App};
use serde::Deserialize;
#[derive(Deserialize)]
struct Info {
username: String,
}
/// deserialize `Info` from request's body
#[post("/")]
async fn index(info: web::Json<Info>) -> String {
format!("Welcome {}!", info.username)
}
§Responder
The Json
type JSON formatted responses. A handler may return a value of type
Json<T>
where T
is the type of a structure to serialize into JSON. The type T
must
implement serde::Serialize
.
use actix_web::{post, web, HttpRequest};
use serde::Serialize;
#[derive(Serialize)]
struct Info {
name: String,
}
#[post("/{name}")]
async fn index(req: HttpRequest) -> web::Json<Info> {
web::Json(Info {
name: req.match_info().get("name").unwrap().to_owned(),
})
}
Tuple Fields§
§0: T
Implementations§
Source§impl<T> Json<T>
impl<T> Json<T>
Sourcepub fn into_inner(self) -> T
pub fn into_inner(self) -> T
Unwrap into inner T
value.
Trait Implementations§
Source§impl<T: DeserializeOwned> FromRequest for Json<T>
See here for example of usage as an extractor.
impl<T: DeserializeOwned> FromRequest for Json<T>
See here for example of usage as an extractor.
Source§fn from_request(req: &HttpRequest, payload: &mut Payload) -> Self::Future
fn from_request(req: &HttpRequest, payload: &mut Payload) -> Self::Future
Create a
Self
from request parts asynchronously.Source§impl<T: Serialize> Responder for Json<T>
Creates response with OK status code, correct content type header, and serialized JSON payload.
impl<T: Serialize> Responder for Json<T>
Creates response with OK status code, correct content type header, and serialized JSON payload.
If serialization failed
type Body = EitherBody<String>
Source§fn respond_to(self, _: &HttpRequest) -> HttpResponse<Self::Body>
fn respond_to(self, _: &HttpRequest) -> HttpResponse<Self::Body>
Convert self to
HttpResponse
.Auto Trait Implementations§
impl<T> Freeze for Json<T>where
T: Freeze,
impl<T> RefUnwindSafe for Json<T>where
T: RefUnwindSafe,
impl<T> Send for Json<T>where
T: Send,
impl<T> Sync for Json<T>where
T: Sync,
impl<T> Unpin for Json<T>where
T: Unpin,
impl<T> UnwindSafe for Json<T>where
T: UnwindSafe,
Blanket Implementations§
Source§impl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere
T: ?Sized,
Source§fn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more
Source§impl<T> Instrument for T
impl<T> Instrument for T
Source§fn instrument(self, span: Span) -> Instrumented<Self>
fn instrument(self, span: Span) -> Instrumented<Self>
Source§fn in_current_span(self) -> Instrumented<Self>
fn in_current_span(self) -> Instrumented<Self>
Source§impl<R> Rng for R
impl<R> Rng for R
Source§fn random<T>(&mut self) -> Twhere
StandardUniform: Distribution<T>,
fn random<T>(&mut self) -> Twhere
StandardUniform: Distribution<T>,
Return a random value via the
StandardUniform
distribution. Read moreSource§fn random_iter<T>(self) -> Iter<StandardUniform, Self, T>
fn random_iter<T>(self) -> Iter<StandardUniform, Self, T>
Source§fn random_range<T, R>(&mut self, range: R) -> Twhere
T: SampleUniform,
R: SampleRange<T>,
fn random_range<T, R>(&mut self, range: R) -> Twhere
T: SampleUniform,
R: SampleRange<T>,
Generate a random value in the given range. Read more
Source§fn random_bool(&mut self, p: f64) -> bool
fn random_bool(&mut self, p: f64) -> bool
Return a bool with a probability
p
of being true. Read moreSource§fn random_ratio(&mut self, numerator: u32, denominator: u32) -> bool
fn random_ratio(&mut self, numerator: u32, denominator: u32) -> bool
Return a bool with a probability of
numerator/denominator
of being
true. Read moreSource§fn sample<T, D>(&mut self, distr: D) -> Twhere
D: Distribution<T>,
fn sample<T, D>(&mut self, distr: D) -> Twhere
D: Distribution<T>,
Sample a new value, using the given distribution. Read more
Source§fn sample_iter<T, D>(self, distr: D) -> Iter<D, Self, T>where
D: Distribution<T>,
Self: Sized,
fn sample_iter<T, D>(self, distr: D) -> Iter<D, Self, T>where
D: Distribution<T>,
Self: Sized,
Create an iterator that generates values using the given distribution. Read more
Source§fn gen<T>(&mut self) -> Twhere
StandardUniform: Distribution<T>,
fn gen<T>(&mut self) -> Twhere
StandardUniform: Distribution<T>,
👎Deprecated since 0.9.0: Renamed to
random
to avoid conflict with the new gen
keyword in Rust 2024.Alias for
Rng::random
.Source§fn gen_range<T, R>(&mut self, range: R) -> Twhere
T: SampleUniform,
R: SampleRange<T>,
fn gen_range<T, R>(&mut self, range: R) -> Twhere
T: SampleUniform,
R: SampleRange<T>,
👎Deprecated since 0.9.0: Renamed to
random_range
Alias for
Rng::random_range
.Source§impl<R> TryRngCore for R
impl<R> TryRngCore for R
Source§type Error = Infallible
type Error = Infallible
The type returned in the event of a RNG error.
Source§fn try_next_u32(&mut self) -> Result<u32, <R as TryRngCore>::Error>
fn try_next_u32(&mut self) -> Result<u32, <R as TryRngCore>::Error>
Return the next random
u32
.Source§fn try_next_u64(&mut self) -> Result<u64, <R as TryRngCore>::Error>
fn try_next_u64(&mut self) -> Result<u64, <R as TryRngCore>::Error>
Return the next random
u64
.Source§fn try_fill_bytes(
&mut self,
dst: &mut [u8],
) -> Result<(), <R as TryRngCore>::Error>
fn try_fill_bytes( &mut self, dst: &mut [u8], ) -> Result<(), <R as TryRngCore>::Error>
Fill
dest
entirely with random data.Source§fn unwrap_mut(&mut self) -> UnwrapMut<'_, Self>
fn unwrap_mut(&mut self) -> UnwrapMut<'_, Self>
Wrap RNG with the
UnwrapMut
wrapper.Source§fn read_adapter(&mut self) -> RngReadAdapter<'_, Self>where
Self: Sized,
fn read_adapter(&mut self) -> RngReadAdapter<'_, Self>where
Self: Sized,
Available on crate feature
std
only.Convert an
RngCore
to a RngReadAdapter
.