use std::error;
use http_api_client_endpoint::{Body, Endpoint, Request, Response};
use oauth2_core::{
access_token_request::{
Body as REQ_Body, BodyWithAuthorizationCodeGrant, CONTENT_TYPE as REQ_CONTENT_TYPE,
METHOD as REQ_METHOD,
},
access_token_response::{CONTENT_TYPE as RES_CONTENT_TYPE, GENERAL_ERROR_BODY_KEY_ERROR},
authorization_code_grant::access_token_response::{
ErrorBody as RES_ErrorBody, SuccessfulBody as RES_SuccessfulBody,
},
http::{
header::{ACCEPT, CONTENT_TYPE},
Error as HttpError,
},
serde::{de::DeserializeOwned, Serialize},
types::{Code, CodeVerifier, Scope},
};
use serde_json::{Error as SerdeJsonError, Map, Value};
use serde_urlencoded::ser::Error as SerdeUrlencodedSerError;
use crate::ProviderExtAuthorizationCodeGrant;
#[derive(Clone)]
pub struct AccessTokenEndpoint<'a, SCOPE>
where
SCOPE: Scope,
{
provider: &'a (dyn ProviderExtAuthorizationCodeGrant<Scope = SCOPE> + Send + Sync),
code: Code,
pub code_verifier: Option<CodeVerifier>,
}
impl<'a, SCOPE> AccessTokenEndpoint<'a, SCOPE>
where
SCOPE: Scope,
{
pub fn new(
provider: &'a (dyn ProviderExtAuthorizationCodeGrant<Scope = SCOPE> + Send + Sync),
code: Code,
) -> Self {
Self {
provider,
code,
code_verifier: None,
}
}
pub fn configure<F>(mut self, mut f: F) -> Self
where
F: FnMut(&mut Self),
{
f(&mut self);
self
}
pub fn set_code_verifier(&mut self, code_verifier: CodeVerifier) {
self.code_verifier = Some(code_verifier);
}
}
impl<'a, SCOPE> Endpoint for AccessTokenEndpoint<'a, SCOPE>
where
SCOPE: Scope + Serialize + DeserializeOwned,
{
type RenderRequestError = AccessTokenEndpointError;
type ParseResponseOutput = Result<RES_SuccessfulBody<SCOPE>, RES_ErrorBody>;
type ParseResponseError = AccessTokenEndpointError;
fn render_request(&self) -> Result<Request<Body>, Self::RenderRequestError> {
let mut body = BodyWithAuthorizationCodeGrant::new(
self.code.to_owned(),
self.provider.redirect_uri().map(|x| x.to_string()),
self.provider.client_id().cloned(),
self.provider.client_secret().cloned(),
);
if let Some(code_verifier) = &self.code_verifier {
body.code_verifier = Some(code_verifier.to_owned());
}
if let Some(extra) = self.provider.access_token_request_body_extra(&body) {
body.set_extra(extra);
}
if let Some(request_ret) = self.provider.access_token_request_rendering(&body) {
let request = request_ret
.map_err(|err| AccessTokenEndpointError::CustomRenderingRequestFailed(err))?;
return Ok(request);
}
let body = REQ_Body::<SCOPE>::AuthorizationCodeGrant(body);
let body_str = serde_urlencoded::to_string(body)
.map_err(AccessTokenEndpointError::SerRequestBodyFailed)?;
let request = Request::builder()
.method(REQ_METHOD)
.uri(self.provider.token_endpoint_url().as_str())
.header(CONTENT_TYPE, REQ_CONTENT_TYPE.to_string())
.header(ACCEPT, RES_CONTENT_TYPE.to_string())
.body(body_str.as_bytes().to_vec())
.map_err(AccessTokenEndpointError::MakeRequestFailed)?;
Ok(request)
}
fn parse_response(
&self,
response: Response<Body>,
) -> Result<Self::ParseResponseOutput, Self::ParseResponseError> {
if let Some(body_ret_ret) = self.provider.access_token_response_parsing(&response) {
let body_ret = body_ret_ret
.map_err(|err| AccessTokenEndpointError::CustomParsingResponseFailed(err))?;
return Ok(body_ret);
}
if response.status().is_success() {
let map = serde_json::from_slice::<Map<String, Value>>(response.body())
.map_err(AccessTokenEndpointError::DeResponseBodyFailed)?;
if !map.contains_key(GENERAL_ERROR_BODY_KEY_ERROR) {
let body = serde_json::from_slice::<RES_SuccessfulBody<SCOPE>>(response.body())
.map_err(AccessTokenEndpointError::DeResponseBodyFailed)?;
return Ok(Ok(body));
}
}
let body = serde_json::from_slice::<RES_ErrorBody>(response.body())
.map_err(AccessTokenEndpointError::DeResponseBodyFailed)?;
Ok(Err(body))
}
}
#[derive(thiserror::Error, Debug)]
pub enum AccessTokenEndpointError {
#[error("CustomRenderingRequestFailed {0}")]
CustomRenderingRequestFailed(Box<dyn error::Error + Send + Sync>),
#[error("SerRequestBodyFailed {0}")]
SerRequestBodyFailed(SerdeUrlencodedSerError),
#[error("MakeRequestFailed {0}")]
MakeRequestFailed(HttpError),
#[error("CustomParsingResponseFailed {0}")]
CustomParsingResponseFailed(Box<dyn error::Error + Send + Sync>),
#[error("DeResponseBodyFailed {0}")]
DeResponseBodyFailed(SerdeJsonError),
}