1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146

use async_trait::async_trait;
pub use jsonwebtoken::errors::Error as JwtError;
pub use jsonwebtoken::{decode, Algorithm, DecodingKey, TokenData, Validation};
use serde::de::DeserializeOwned;
use std::marker::PhantomData;

use salvo_core::Depot;
use salvo_core::http::header::AUTHORIZATION;
use salvo_core::http::{Request, Response};
use salvo_core::http::errors::*;
use salvo_core::Handler;

pub struct JwtHandler<C>
where
    C: DeserializeOwned + Sync + Send + 'static,
{
    config: JwtConfig<C>,
}
pub struct JwtConfig<C>
where
    C: DeserializeOwned + Sync + Send + 'static,
{
    pub secret: String,
    pub context_token_key: Option<String>,
    pub context_data_key: Option<String>,
    pub context_state_key: Option<String>,
    pub response_error: bool,
    pub claims: PhantomData<C>,
    pub validation: Validation,
    pub extractors: Vec<Box<dyn JwtExtractor>>,
}
#[async_trait]
pub trait JwtExtractor: Send + Sync {
    async fn get_token(&self, req: &mut Request) -> Option<String>;
}

#[derive(Default)]
pub struct HeaderExtractor;
impl HeaderExtractor {
    pub fn new() -> Self {
        HeaderExtractor {}
    }
}
#[async_trait]
impl JwtExtractor for HeaderExtractor {
    async fn get_token(&self, req: &mut Request) -> Option<String> {
        if let Some(auth) = req.headers().get(AUTHORIZATION) {
            if let Ok(auth) = auth.to_str() {
                if auth.starts_with("Bearer") {
                    return auth.splitn(2, ' ').collect::<Vec<&str>>().pop().map(|s| s.to_owned());
                }
            }
        }
        None
    }
}

pub struct FormExtractor(String);
impl FormExtractor {
    pub fn new<T: Into<String>>(name: T) -> Self {
        FormExtractor(name.into())
    }
}
#[async_trait]
impl JwtExtractor for FormExtractor {
    async fn get_token(&self, req: &mut Request) -> Option<String> {
        req.get_form(&self.0).await
    }
}

pub struct QueryExtractor(String);
impl QueryExtractor {
    pub fn new<T: Into<String>>(name: T) -> Self {
        QueryExtractor(name.into())
    }
}

#[async_trait]
impl JwtExtractor for QueryExtractor {
    async fn get_token(&self, req: &mut Request) -> Option<String> {
        req.get_query(&self.0)
    }
}

pub struct CookieExtractor(String);
impl CookieExtractor {
    pub fn new<T: Into<String>>(name: T) -> Self {
        CookieExtractor(name.into())
    }
}
#[async_trait]
impl JwtExtractor for CookieExtractor {
    async fn get_token(&self, req: &mut Request) -> Option<String> {
        req.get_cookie(&self.0).map(|c| c.value().to_owned())
    }
}

impl<C> JwtHandler<C>
where
    C: DeserializeOwned + Sync + Send + 'static,
{
    pub fn new(config: JwtConfig<C>) -> JwtHandler<C> {
        JwtHandler { config }
    }
    pub fn decode(&self, token: &str) -> Result<TokenData<C>, JwtError> {
        decode::<C>(&token, &DecodingKey::from_secret(&*self.config.secret.as_ref()), &self.config.validation)
    }
}

#[async_trait]
impl<C> Handler for JwtHandler<C>
where
    C: DeserializeOwned + Sync + Send + 'static,
{
    async fn handle(&self, req: &mut Request, depot: &mut Depot, res: &mut Response) {
        for extractor in &self.config.extractors {
            if let Some(token) = extractor.get_token(req).await {
                if let Ok(data) = self.decode(&token) {
                    if let Some(key) = &self.config.context_data_key {
                        depot.insert(key.clone(), data);
                    }
                    if let Some(key) = &self.config.context_state_key {
                        depot.insert(key.clone(), "authorized");
                    }
                } else {
                    if let Some(key) = &self.config.context_state_key {
                        depot.insert(key.clone(), "forbidden");
                    }
                    if self.config.response_error {
                        res.set_http_error(Forbidden());
                    }
                }
                if let Some(key) = &self.config.context_token_key {
                    depot.insert(key.clone(), token);
                }
                return;
            }
        }
        if let Some(key) = &self.config.context_state_key {
            depot.insert(key.clone(), "unauthorized");
        }
        if self.config.response_error {
            res.set_http_error(Unauthorized());
        }
    }
}