Struct requiem_web::web::Query

pub struct Query<T>(pub T);

Extract typed information from the request's query.

Note: A query string consists of unordered key=value pairs, therefore it cannot be decoded into any type which depends upon data ordering e.g. tuples or tuple-structs. Attempts to do so will fail at runtime.

QueryConfig allows to configure extraction process.

Example

use requiem_web::{web, App};
use serde_derive::Deserialize;

#[derive(Debug, Deserialize)]
pub enum ResponseType {
   Token,
   Code
}

#[derive(Deserialize)]
pub struct AuthRequest {
   id: u64,
   response_type: ResponseType,
}

// Use `Query` extractor for query information (and destructure it within the signature).
// This handler gets called only if the request's query string contains a `username` field.
// The correct request for this handler would be `/index.html?id=64&response_type=Code"`.
async fn index(web::Query(info): web::Query<AuthRequest>) -> String {
    format!("Authorization request for client with id={} and type={:?}!", info.id, info.response_type)
}

fn main() {
    let app = App::new().service(
       web::resource("/index.html").route(web::get().to(index))); // <- use `Query` extractor
}

Methods

impl<T> Query<T>

pub fn into_inner(self) -> T

Deconstruct to a inner value

pub fn from_query(query_str: &str) -> Result<Self, QueryPayloadError> where
    T: DeserializeOwned, 

Get query parameters from the path

Trait Implementations

impl<T: Debug> Debug for Query<T>

fn fmt(&self, f: &mut Formatter) -> Result

Formats the value using the given formatter.

impl<T> Deref for Query<T>

type Target = T

The resulting type after dereferencing.

fn deref(&self) -> &T

Dereferences the value.

impl<T> DerefMut for Query<T>

fn deref_mut(&mut self) -> &mut T

Mutably dereferences the value.

impl<T: Display> Display for Query<T>

fn fmt(&self, f: &mut Formatter) -> Result

Formats the value using the given formatter.

impl<T: Eq> Eq for Query<T>

impl<T> FromRequest for Query<T> where
    T: DeserializeOwned, 

Extract typed information from the request's query.

Example

use requiem_web::{web, App};
use serde_derive::Deserialize;

#[derive(Debug, Deserialize)]
pub enum ResponseType {
   Token,
   Code
}

#[derive(Deserialize)]
pub struct AuthRequest {
   id: u64,
   response_type: ResponseType,
}

// Use `Query` extractor for query information.
// This handler get called only if request's query contains `username` field
// The correct request for this handler would be `/index.html?id=64&response_type=Code"`
async fn index(info: web::Query<AuthRequest>) -> String {
    format!("Authorization request for client with id={} and type={:?}!", info.id, info.response_type)
}

fn main() {
    let app = App::new().service(
       web::resource("/index.html")
           .route(web::get().to(index))); // <- use `Query` extractor
}

type Error = Error

The associated error which can be returned.

type Future = Ready<Result<Self, Error>>

Future that resolves to a Self

type Config = QueryConfig

Configuration for this extractor

fn from_request(req: &HttpRequest, _: &mut Payload) -> Self::Future

Convert request to a Self

fn extract(req: &HttpRequest) -> Self::Future

Convert request to a Self

fn configure<F>(f: F) -> Self::Config where
    F: FnOnce(Self::Config) -> Self::Config, 

Create and configure config instance.

impl<T: Ord> Ord for Query<T>

fn cmp(&self, other: &Query<T>) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

🔬 This is a nightly-only experimental API. (clamp)

Restrict a value to a certain interval.

impl<T: PartialEq> PartialEq<Query<T>> for Query<T>

fn eq(&self, other: &Query<T>) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Query<T>) -> bool

This method tests for !=.

impl<T: PartialOrd> PartialOrd<Query<T>> for Query<T>

fn partial_cmp(&self, other: &Query<T>) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

fn lt(&self, other: &Query<T>) -> bool

This method tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &Query<T>) -> bool

This method tests less than or equal to (for self and other) and is used by the <= operator.

fn gt(&self, other: &Query<T>) -> bool

This method tests greater than (for self and other) and is used by the > operator.

fn ge(&self, other: &Query<T>) -> bool

This method tests greater than or equal to (for self and other) and is used by the >= operator.

impl<T> StructuralEq for Query<T>

impl<T> StructuralPartialEq for Query<T>