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

pub struct JsonConfig { /* fields omitted */ }

Json extractor configuration

#[macro_use] extern crate serde_derive;
use actix_web::{error, web, App, FromRequest, HttpResponse};

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 Send for JsonConfig

impl Sync for JsonConfig

Blanket Implementations

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

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

impl<T> ToOwned for T where
    T: Clone

type Owned = T

The resulting type after obtaining ownership.

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<T> Erased for T

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