[][src]Struct actix_web::web::JsonConfig

pub struct JsonConfig { /* fields omitted */ }

Json extractor configuration

use actix_web::{error, web, App, FromRequest, HttpResponse};
use serde_derive::Deserialize;

struct Info {
    username: String,

/// deserialize `Info` from request's body, max payload size is 4kb
fn index(info: web::Json<Info>) -> String {
    format!("Welcome {}!", info.username)

fn main() {
    let app = App::new().service(
            // change json extractor configuration
            web::Json::<Info>::configure(|cfg| {
                   .content_type(|mime| {  // <- accept text/plain content type
                        mime.type_() == mime::TEXT && mime.subtype() == mime::PLAIN
                   .error_handler(|err, req| {  // <- create custom error response
                            err, HttpResponse::Conflict().finish()).into()


impl JsonConfig[src]

pub fn limit(self, limit: usize) -> Self[src]

Change max size of payload. By default max size is 32Kb

pub fn error_handler<F>(self, f: F) -> Self where
    F: Fn(JsonPayloadError, &HttpRequest) -> Error + Send + Sync + 'static, 

Set custom error handler

pub fn content_type<F>(self, predicate: F) -> Self where
    F: Fn(Mime) -> bool + Send + Sync + 'static, 

Set predicate for allowed content types

Trait Implementations

impl Default for JsonConfig[src]

impl Clone for JsonConfig[src]

fn clone_from(&mut self, source: &Self)1.0.0[src]

Performs copy-assignment from source. Read more

Auto Trait Implementations

impl Unpin for JsonConfig

impl Sync for JsonConfig

impl Send for JsonConfig

impl !UnwindSafe for JsonConfig

impl !RefUnwindSafe for JsonConfig

Blanket Implementations

impl<T> From<T> for T[src]

impl<T> ToOwned for T where
    T: Clone

type Owned = T

The resulting type after obtaining ownership.

impl<T, U> Into<U> for T where
    U: From<T>, 

impl<T, U> TryFrom<U> for T where
    U: Into<T>, 

type Error = Infallible

The type returned in the event of a conversion error.

impl<T, U> TryInto<U> for T where
    U: TryFrom<T>, 

type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.

impl<T> BorrowMut<T> for T where
    T: ?Sized

impl<T> Borrow<T> for T where
    T: ?Sized

impl<T> Any for T where
    T: 'static + ?Sized

impl<V, T> VZip<V> for T where
    V: MultiLane<T>,