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ItsEthra 2023-12-01 21:40:34 +03:00
parent 66d444b760
commit a223399361
2 changed files with 269 additions and 269 deletions
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284
src/responders.rs
View file

@ -1,6 +1,6 @@
//! Axum responses for htmx response headers.
use std::convert::Infallible;
use std::{convert::Infallible, str::FromStr};
use axum_core::response::{IntoResponse, IntoResponseParts, ResponseParts};
use http::{header::InvalidHeaderValue, HeaderValue, StatusCode, Uri};
@ -32,15 +32,71 @@ const HX_SWAP_NONE: &str = "none";
///
/// See <https://htmx.org/headers/hx-location/> for more information.
#[derive(Debug, Clone)]
pub struct HxLocation(pub Uri);
pub struct HxLocation {
/// Uri of the new location.
pub uri: Uri,
/// Extra options.
#[cfg(feature = "serde")]
#[cfg_attr(feature = "unstable", doc(cfg(feature = "serde")))]
pub options: serde::LocationOptions,
}
impl HxLocation {
pub fn from_uri(uri: Uri) -> Self {
Self {
#[cfg(feature = "serde")]
options: serde::LocationOptions::default(),
uri,
}
}
#[cfg(feature = "serde")]
#[cfg_attr(feature = "unstable", doc(cfg(feature = "serde")))]
pub fn from_uri_with_options(uri: Uri, options: serde::LocationOptions) -> Self {
Self { uri, options }
}
#[cfg(feature = "serde")]
fn into_header_with_options(self) -> Result<String, HxError> {
if self.options.is_default() {
return Ok(self.uri.to_string());
}
#[derive(::serde::Serialize)]
struct LocWithOpts {
path: String,
#[serde(flatten)]
opts: serde::LocationOptions,
}
let loc_with_opts = LocWithOpts {
path: self.uri.to_string(),
opts: self.options,
};
Ok(serde_json::to_string(&loc_with_opts)?)
}
}
impl<'a> TryFrom<&'a str> for HxLocation {
type Error = <Uri as FromStr>::Err;
fn try_from(value: &'a str) -> Result<Self, Self::Error> {
Ok(Self::from_uri(Uri::from_str(value)?))
}
}
impl IntoResponseParts for HxLocation {
type Error = HxError;
fn into_response_parts(self, mut res: ResponseParts) -> Result<ResponseParts, Self::Error> {
#[cfg(feature = "serde")]
let header = self.into_header_with_options()?;
#[cfg(not(feature = "serde"))]
let header = self.uri.to_string();
res.headers_mut().insert(
headers::HX_LOCATION,
HeaderValue::from_maybe_shared(self.0.to_string())?,
HeaderValue::from_maybe_shared(header)?,
);
Ok(res)
@ -71,6 +127,14 @@ impl IntoResponseParts for HxPushUrl {
}
}
impl<'a> TryFrom<&'a str> for HxPushUrl {
type Error = <Uri as FromStr>::Err;
fn try_from(value: &'a str) -> Result<Self, Self::Error> {
Ok(Self(value.parse()?))
}
}
/// The `HX-Redirect` header.
///
/// Can be used to do a client-side redirect to a new location.
@ -93,6 +157,14 @@ impl IntoResponseParts for HxRedirect {
}
}
impl<'a> TryFrom<&'a str> for HxRedirect {
type Error = <Uri as FromStr>::Err;
fn try_from(value: &'a str) -> Result<Self, Self::Error> {
Ok(Self(value.parse()?))
}
}
/// The `HX-Refresh`header.
///
/// If set to `true` the client-side will do a full refresh of the page.
@ -142,6 +214,14 @@ impl IntoResponseParts for HxReplaceUrl {
}
}
impl<'a> TryFrom<&'a str> for HxReplaceUrl {
type Error = <Uri as FromStr>::Err;
fn try_from(value: &'a str) -> Result<Self, Self::Error> {
Ok(Self(value.parse()?))
}
}
/// The `HX-Reswap` header.
///
/// Allows you to specidy how the response will be swapped.
@ -206,6 +286,71 @@ impl IntoResponseParts for HxReselect {
}
}
/// Represents a client-side event carrying optional data.
#[derive(Debug, Clone, ::serde::Serialize)]
pub struct HxEvent {
pub name: String,
#[serde(skip_serializing_if = "Option::is_none")]
#[cfg(feature = "serde")]
#[cfg_attr(feature = "unstable", doc(cfg(feature = "serde")))]
pub data: Option<::serde_json::Value>,
}
impl HxEvent {
/// Creates new event with no associated data.
pub fn new(name: String) -> Self {
Self {
name: name.to_string(),
data: None,
}
}
/// Creates new event with event data.
#[cfg(feature = "serde")]
#[cfg_attr(feature = "unstable", doc(cfg(feature = "serde")))]
pub fn new_with_data<T: ::serde::Serialize>(
name: impl ToString,
data: T,
) -> Result<Self, serde_json::Error> {
let data = serde_json::to_value(data)?;
Ok(Self {
name: name.to_string(),
data: Some(data),
})
}
}
#[cfg(feature = "serde")]
fn events_to_header_value(events: Vec<HxEvent>) -> Result<HeaderValue, HxError> {
use std::collections::HashMap;
use serde_json::Value;
let with_data = events.iter().any(|e| e.data.is_some());
let header_value = if with_data {
// at least one event contains data so the header_value needs to be json
// encoded.
let header_value = events
.into_iter()
.map(|e| (e.name, e.data.unwrap_or_default()))
.collect::<HashMap<String, Value>>();
serde_json::to_string(&header_value)?
} else {
// no event contains data, the event names can be put in the header
// value separated by a comma.
events
.into_iter()
.map(|e| e.name)
.reduce(|acc, e| acc + ", " + &e)
.unwrap_or_default()
};
HeaderValue::from_maybe_shared(header_value).map_err(HxError::from)
}
/// The `HX-Trigger` header.
///
/// Allows you to trigger client-side events. If you intend to add data to your
@ -217,15 +362,15 @@ impl IntoResponseParts for HxReselect {
///
/// See <https://htmx.org/headers/hx-trigger/> for more information.
#[derive(Debug, Clone)]
pub struct HxResponseTrigger(pub Vec<String>);
pub struct HxResponseTrigger(pub Vec<HxEvent>);
impl<T> From<T> for HxResponseTrigger
where
T: IntoIterator,
T::Item: ToString,
T::Item: Into<HxEvent>,
{
fn from(value: T) -> Self {
Self(value.into_iter().map(|s| s.to_string()).collect())
Self(value.into_iter().map(Into::into).collect())
}
}
@ -233,15 +378,8 @@ impl IntoResponseParts for HxResponseTrigger {
type Error = HxError;
fn into_response_parts(self, mut res: ResponseParts) -> Result<ResponseParts, Self::Error> {
res.headers_mut().insert(
headers::HX_TRIGGER,
HeaderValue::from_maybe_shared(
self.0
.into_iter()
.reduce(|acc, e| acc + ", " + &e)
.unwrap_or_default(),
)?,
);
res.headers_mut()
.insert(headers::HX_TRIGGER, events_to_header_value(self.0)?);
Ok(res)
}
@ -259,15 +397,15 @@ impl IntoResponseParts for HxResponseTrigger {
///
/// See <https://htmx.org/headers/hx-trigger/> for more information.
#[derive(Debug, Clone)]
pub struct HxResponseTriggerAfterSettle(pub Vec<String>);
pub struct HxResponseTriggerAfterSettle(pub Vec<HxEvent>);
impl<T> From<T> for HxResponseTriggerAfterSettle
where
T: IntoIterator,
T::Item: ToString,
T::Item: Into<HxEvent>,
{
fn from(value: T) -> Self {
Self(value.into_iter().map(|s| s.to_string()).collect())
Self(value.into_iter().map(Into::into).collect())
}
}
@ -275,15 +413,8 @@ impl IntoResponseParts for HxResponseTriggerAfterSettle {
type Error = HxError;
fn into_response_parts(self, mut res: ResponseParts) -> Result<ResponseParts, Self::Error> {
res.headers_mut().insert(
headers::HX_TRIGGER_AFTER_SETTLE,
HeaderValue::from_maybe_shared(
self.0
.into_iter()
.reduce(|acc, e| acc + ", " + &e)
.unwrap_or_default(),
)?,
);
res.headers_mut()
.insert(headers::HX_TRIGGER, events_to_header_value(self.0)?);
Ok(res)
}
@ -300,15 +431,15 @@ impl IntoResponseParts for HxResponseTriggerAfterSettle {
///
/// See <https://htmx.org/headers/hx-trigger/> for more information.
#[derive(Debug, Clone)]
pub struct HxResponseTriggerAfterSwap(pub Vec<String>);
pub struct HxResponseTriggerAfterSwap(pub Vec<HxEvent>);
impl<T> From<T> for HxResponseTriggerAfterSwap
where
T: IntoIterator,
T::Item: ToString,
T::Item: Into<HxEvent>,
{
fn from(value: T) -> Self {
Self(value.into_iter().map(|s| s.to_string()).collect())
Self(value.into_iter().map(Into::into).collect())
}
}
@ -316,15 +447,8 @@ impl IntoResponseParts for HxResponseTriggerAfterSwap {
type Error = HxError;
fn into_response_parts(self, mut res: ResponseParts) -> Result<ResponseParts, Self::Error> {
res.headers_mut().insert(
headers::HX_TRIGGER_AFTER_SWAP,
HeaderValue::from_maybe_shared(
self.0
.into_iter()
.reduce(|acc, e| acc + ", " + &e)
.unwrap_or_default(),
)?,
);
res.headers_mut()
.insert(headers::HX_TRIGGER, events_to_header_value(self.0)?);
Ok(res)
}
@ -353,6 +477,32 @@ pub enum SwapOption {
None,
}
// can be removed and automatically derived when
// https://github.com/serde-rs/serde/issues/2485 is implemented
#[cfg(feature = "serde")]
impl ::serde::Serialize for SwapOption {
fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
where
S: ::serde::Serializer,
{
const UNIT_NAME: &str = "SwapOption";
match self {
Self::InnerHtml => serializer.serialize_unit_variant(UNIT_NAME, 0, HX_SWAP_INNER_HTML),
Self::OuterHtml => serializer.serialize_unit_variant(UNIT_NAME, 1, HX_SWAP_OUTER_HTML),
Self::BeforeBegin => {
serializer.serialize_unit_variant(UNIT_NAME, 2, HX_SWAP_BEFORE_BEGIN)
}
Self::AfterBegin => {
serializer.serialize_unit_variant(UNIT_NAME, 3, HX_SWAP_AFTER_BEGIN)
}
Self::BeforeEnd => serializer.serialize_unit_variant(UNIT_NAME, 4, HX_SWAP_BEFORE_END),
Self::AfterEnd => serializer.serialize_unit_variant(UNIT_NAME, 5, HX_SWAP_AFTER_END),
Self::Delete => serializer.serialize_unit_variant(UNIT_NAME, 6, HX_SWAP_DELETE),
Self::None => serializer.serialize_unit_variant(UNIT_NAME, 7, HX_SWAP_NONE),
}
}
}
impl From<SwapOption> for HeaderValue {
fn from(value: SwapOption) -> Self {
match value {
@ -373,7 +523,8 @@ pub enum HxError {
InvalidHeaderValue(InvalidHeaderValue),
#[cfg(feature = "serde")]
Serialization(serde_json::Error),
#[cfg_attr(feature = "unstable", doc(cfg(feature = "serde")))]
Json(serde_json::Error),
}
impl From<InvalidHeaderValue> for HxError {
@ -383,9 +534,10 @@ impl From<InvalidHeaderValue> for HxError {
}
#[cfg(feature = "serde")]
#[cfg_attr(feature = "unstable", doc(cfg(feature = "serde")))]
impl From<serde_json::Error> for HxError {
fn from(value: serde_json::Error) -> Self {
Self::Serialization(value)
Self::Json(value)
}
}
@ -397,7 +549,7 @@ impl IntoResponse for HxError {
}
#[cfg(feature = "serde")]
Self::Serialization(_) => (
Self::Json(_) => (
StatusCode::INTERNAL_SERVER_ERROR,
"failed to serialize event",
)
@ -405,3 +557,51 @@ impl IntoResponse for HxError {
}
}
}
#[cfg(test)]
mod tests {
use http::HeaderValue;
use serde_json::json;
use crate::{responders::events_to_header_value, HxEvent};
#[test]
#[cfg(feature = "serde")]
fn test_serialize_location() {
use crate::{serde::LocationOptions, HxLocation, SwapOption::InnerHtml};
let loc = HxLocation::try_from("/foo").unwrap();
assert_eq!(loc.into_header_with_options().unwrap(), "/foo");
let loc = HxLocation::from_uri_with_options(
"/foo".parse().unwrap(),
LocationOptions {
event: Some("click".into()),
swap: Some(InnerHtml),
..Default::default()
},
);
assert_eq!(
loc.into_header_with_options().unwrap(),
r#"{"path":"/foo","event":"click","swap":"innerHTML"}"#
);
}
#[test]
fn valid_event_to_header_encoding() {
let evt = HxEvent::new_with_data(
"my-event",
json!({"level": "info", "message": {
"body": "This is a test message.",
"title": "Hello, world!",
}}),
)
.unwrap();
let header_value = events_to_header_value(vec![evt]).unwrap();
let expected_value = r#"{"my-event":{"level":"info","message":{"body":"This is a test message.","title":"Hello, world!"}}}"#;
assert_eq!(header_value, HeaderValue::from_static(expected_value));
}
}

254
src/responders/serde.rs
View file

@ -1,54 +1,47 @@
use std::collections::HashMap;
use axum_core::response::{IntoResponseParts, ResponseParts};
use http::{HeaderValue, Uri};
use serde::Serialize;
use serde_json::Value;
use crate::{
headers,
responders::{
HX_SWAP_AFTER_BEGIN, HX_SWAP_AFTER_END, HX_SWAP_BEFORE_BEGIN, HX_SWAP_BEFORE_END,
HX_SWAP_DELETE, HX_SWAP_INNER_HTML, HX_SWAP_NONE, HX_SWAP_OUTER_HTML,
},
HxError, SwapOption,
};
use crate::SwapOption;
/// The `HX-Location` header.
/// More options for `HX-Location` header.
///
/// This response header can be used to trigger a client side redirection
/// without reloading the whole page. If you only intend to redirect to the
/// `document.body`, as opposed to a specific target, you can use
/// `axum_htmx::HxResponseLocation` instead.
///
/// Will fail if the supplied data contains or produces characters that are not
/// visible ASCII (32-127) when serializing to JSON.
///
/// See <https://htmx.org/headers/hx-location/> for more information.
#[derive(Debug, Clone, Serialize)]
pub struct HxLocation {
/// Url to load the response from.
pub path: String,
/// - `source` - the source element of the request
/// - `event` - an event that “triggered” the request
/// - `handler` - a callback that will handle the response HTML
/// - `target` - the target to swap the response into
/// - `swap` - how the response will be swapped in relative to the target
/// - `values` - values to submit with the request
/// - `headers` - headers to submit with the request
/// - `select` - allows you to select the content you want swapped from a response
#[derive(Debug, Clone, Serialize, Default)]
#[non_exhaustive]
pub struct LocationOptions {
/// The source element of the request.
#[serde(skip_serializing_if = "Option::is_none")]
pub source: Option<String>,
/// An event that "triggered" the request.
#[serde(skip_serializing_if = "Option::is_none")]
pub event: Option<String>,
/// A callback that will handle the response HTML.
#[serde(skip_serializing_if = "Option::is_none")]
pub handler: Option<String>,
/// The target to swap the response into.
#[serde(skip_serializing_if = "Option::is_none")]
pub target: Option<String>,
/// How the response will be swapped in relative to the target.
#[serde(skip_serializing_if = "Option::is_none")]
pub swap: Option<SwapOption>,
/// Values to submit with the request.
#[serde(skip_serializing_if = "Option::is_none")]
pub values: Option<Value>,
/// Headers to submit with the request.
#[serde(skip_serializing_if = "Option::is_none")]
pub headers: Option<Value>,
}
impl HxLocation {
pub fn from_uri(uri: &Uri) -> Self {
Self {
path: uri.to_string(),
impl LocationOptions {
pub(super) fn is_default(&self) -> bool {
let Self {
source: None,
event: None,
handler: None,
@ -56,204 +49,11 @@ impl HxLocation {
swap: None,
values: None,
headers: None,
}
}
}
impl IntoResponseParts for HxLocation {
type Error = HxError;
fn into_response_parts(self, mut res: ResponseParts) -> Result<ResponseParts, Self::Error> {
let header_value = if self.source.is_none()
&& self.event.is_none()
&& self.handler.is_none()
&& self.target.is_none()
&& self.swap.is_none()
&& self.values.is_none()
&& self.headers.is_none()
{
HeaderValue::from_str(&self.path)?
} else {
HeaderValue::from_maybe_shared(serde_json::to_string(&self)?)?
} = self
else {
return false;
};
res.headers_mut().insert(headers::HX_LOCATION, header_value);
Ok(res)
}
}
/// The `HX-Trigger` header.
///
/// Allows you to trigger client-side events. If you only need to send bare
/// events, you can use `axum_htmx::HxResponseTrigger` instead.
///
/// Will fail if the supplied events contain or produce characters that are not
/// visible ASCII (32-127) when serializing to JSON.
///
/// See <https://htmx.org/headers/hx-trigger/> for more information.
#[derive(Debug, Clone)]
pub struct HxResponseTrigger(pub Vec<HxEvent>);
impl IntoResponseParts for HxResponseTrigger {
type Error = HxError;
fn into_response_parts(self, mut res: ResponseParts) -> Result<ResponseParts, Self::Error> {
res.headers_mut()
.insert(headers::HX_TRIGGER, events_to_header_value(self.0)?);
Ok(res)
}
}
/// The `HX-Trigger-After-Settle` header.
///
/// Allows you to trigger client-side events after the settle step. If you only
/// intend to send bare events, you can use
/// `axum_htmx::HxResponseTriggerAfterSettle` instead.
///
/// Will fail if the supplied events contain or produce characters that are not
/// visible ASCII (32-127) when serializing to JSON.
///
/// See <https://htmx.org/headers/hx-trigger/> for more information.
#[derive(Debug, Clone)]
pub struct HxResponseTriggerAfterSettle(pub Vec<HxEvent>);
impl IntoResponseParts for HxResponseTriggerAfterSettle {
type Error = HxError;
fn into_response_parts(self, mut res: ResponseParts) -> Result<ResponseParts, Self::Error> {
res.headers_mut().insert(
headers::HX_TRIGGER_AFTER_SETTLE,
events_to_header_value(self.0)?,
);
Ok(res)
}
}
/// The `HX-Trigger-After-Swap` header.
///
/// Allows you to trigger client-side events after the swap step. If you only
/// need to send bare events, you can use
/// `axum_htmx::HxResponseTriggerAfterSwao` instead.
///
/// Will fail if the supplied events contain or produce characters that are not
/// visible ASCII (32-127) when serializing to JSON.
///
/// See <https://htmx.org/headers/hx-trigger/> for more information.
#[derive(Debug, Clone)]
pub struct HxResponseTriggerAfterSwap(pub Vec<HxEvent>);
impl IntoResponseParts for HxResponseTriggerAfterSwap {
type Error = HxError;
fn into_response_parts(self, mut res: ResponseParts) -> Result<ResponseParts, Self::Error> {
res.headers_mut().insert(
headers::HX_TRIGGER_AFTER_SWAP,
events_to_header_value(self.0)?,
);
Ok(res)
}
}
/// Represents a client-side event carrying optional data.
#[derive(Debug, Clone, Serialize)]
pub struct HxEvent {
pub name: String,
pub data: Option<Value>,
}
impl HxEvent {
pub fn new<T: Serialize>(name: String) -> Self {
Self {
name: name.to_string(),
data: None,
}
}
pub fn new_with_data<T: Serialize>(name: &str, data: T) -> Result<Self, serde_json::Error> {
let data = serde_json::to_value(data)?;
Ok(Self {
name: name.to_string(),
data: Some(data),
})
}
}
pub(crate) fn events_to_header_value(events: Vec<HxEvent>) -> Result<HeaderValue, HxError> {
let with_data = events.iter().any(|e| e.data.is_some());
let header_value = if with_data {
// at least one event contains data so the header_value needs to be json
// encoded.
let header_value = events
.into_iter()
.map(|e| (e.name, e.data.unwrap_or_default()))
.collect::<HashMap<String, Value>>();
serde_json::to_string(&header_value)?
} else {
// no event contains data, the event names can be put in the header
// value separated by a comma.
events
.into_iter()
.map(|e| e.name)
.reduce(|acc, e| acc + ", " + &e)
.unwrap_or_default()
};
HeaderValue::from_maybe_shared(header_value).map_err(HxError::from)
}
// can be removed and automatically derived when
// https://github.com/serde-rs/serde/issues/2485 is implemented
impl serde::Serialize for SwapOption {
fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
where
S: serde::Serializer,
{
const UNIT_NAME: &str = "SwapOption";
match self {
Self::InnerHtml => serializer.serialize_unit_variant(UNIT_NAME, 0, HX_SWAP_INNER_HTML),
Self::OuterHtml => serializer.serialize_unit_variant(UNIT_NAME, 1, HX_SWAP_OUTER_HTML),
Self::BeforeBegin => {
serializer.serialize_unit_variant(UNIT_NAME, 2, HX_SWAP_BEFORE_BEGIN)
}
Self::AfterBegin => {
serializer.serialize_unit_variant(UNIT_NAME, 3, HX_SWAP_AFTER_BEGIN)
}
Self::BeforeEnd => serializer.serialize_unit_variant(UNIT_NAME, 4, HX_SWAP_BEFORE_END),
Self::AfterEnd => serializer.serialize_unit_variant(UNIT_NAME, 5, HX_SWAP_AFTER_END),
Self::Delete => serializer.serialize_unit_variant(UNIT_NAME, 6, HX_SWAP_DELETE),
Self::None => serializer.serialize_unit_variant(UNIT_NAME, 7, HX_SWAP_NONE),
}
}
}
#[cfg(test)]
mod tests {
use serde_json::json;
use super::*;
#[test]
fn valid_event_to_header_encoding() {
let evt = HxEvent::new_with_data(
"my-event",
json!({"level": "info", "message": {
"body": "This is a test message.",
"title": "Hello, world!",
}}),
)
.unwrap();
let header_value = events_to_header_value(vec![evt]).unwrap();
let expected_value = r#"{"my-event":{"level":"info","message":{"body":"This is a test message.","title":"Hello, world!"}}}"#;
assert_eq!(header_value, HeaderValue::from_static(expected_value));
true
}
}