actix-cloud 0.5.1

Actix Cloud is an all-in-one web framework based on Actix Web.
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

use core::time;
use std::sync::Arc;

use actix_web::cookie::time::Duration;
use serde_json::{Map, Value};

use super::{utils::generate_session_key, SessionKey};
use crate::{memorydb::MemoryDB, Result};

pub(crate) type SessionState = Map<String, Value>;

#[derive(Clone)]
pub struct SessionStore {
    configuration: CacheConfiguration,
    client: Arc<dyn MemoryDB>,
}

#[derive(Clone)]
struct CacheConfiguration {
    cache_keygen: Arc<dyn Fn(&str) -> String + Send + Sync>,
}

impl Default for CacheConfiguration {
    fn default() -> Self {
        Self {
            cache_keygen: Arc::new(str::to_owned),
        }
    }
}

impl SessionStore {
    pub fn new(client: Arc<dyn MemoryDB>) -> Self {
        Self {
            client,
            configuration: CacheConfiguration::default(),
        }
    }

    /// Set a custom cache key generation strategy, expecting a session key as input.
    pub fn cache_keygen<F>(&mut self, keygen: F)
    where
        F: Fn(&str) -> String + 'static + Send + Sync,
    {
        self.configuration.cache_keygen = Arc::new(keygen);
    }

    pub async fn load(&self, session_key: &SessionKey) -> Result<Option<SessionState>> {
        let cache_key = (self.configuration.cache_keygen)(session_key.as_ref());
        let value = self.client.get(&cache_key).await?;

        match value {
            None => Ok(None),
            Some(value) => Ok(serde_json::from_str(&value).ok()),
        }
    }

    pub async fn save(
        &self,
        session_state: SessionState,
        id: &Option<String>,
        ttl: &Duration,
    ) -> Result<SessionKey> {
        let body = serde_json::to_string(&session_state)?;
        let session_key = generate_session_key();
        let cache_key = (self.configuration.cache_keygen)(session_key.as_ref());

        self.client
            .set_ex(&cache_key, &body, &Self::parse_ttl(ttl))
            .await?;

        if let Some(id) = id {
            let key =
                (self.configuration.cache_keygen)(&format!("{}_{}", id, session_key.as_ref()));
            self.client.set_ex(&key, "1", &Self::parse_ttl(ttl)).await?;
        }

        Ok(session_key)
    }

    pub async fn update(
        &self,
        session_key: SessionKey,
        session_state: SessionState,
        id: &Option<String>,
        ttl: &Duration,
    ) -> Result<SessionKey> {
        let body = serde_json::to_string(&session_state)?;
        let cache_key = (self.configuration.cache_keygen)(session_key.as_ref());

        self.client
            .set_ex(&cache_key, &body, &Self::parse_ttl(ttl))
            .await?;

        if let Some(id) = id {
            let key =
                (self.configuration.cache_keygen)(&format!("{}_{}", id, session_key.as_ref()));
            self.client.set_ex(&key, "1", &Self::parse_ttl(ttl)).await?;
        }

        Ok(session_key)
    }

    pub async fn update_ttl(
        &self,
        session_key: &SessionKey,
        id: &Option<String>,
        ttl: &Duration,
    ) -> Result<()> {
        let cache_key = (self.configuration.cache_keygen)(session_key.as_ref());

        self.client.expire(&cache_key, ttl.whole_seconds()).await?;
        if let Some(id) = id {
            let key =
                (self.configuration.cache_keygen)(&format!("{}_{}", id, session_key.as_ref()));
            self.client.expire(&key, ttl.whole_seconds()).await?;
        }
        Ok(())
    }

    pub async fn delete(&self, session_key: &SessionKey, id: &Option<String>) -> Result<()> {
        let cache_key = (self.configuration.cache_keygen)(session_key.as_ref());

        self.client.del(&cache_key).await?;
        if let Some(id) = id {
            let key =
                (self.configuration.cache_keygen)(&format!("{}_{}", id, session_key.as_ref()));
            self.client.del(&key).await?;
        }
        Ok(())
    }

    fn parse_ttl(t: &Duration) -> time::Duration {
        let t = t.whole_seconds();
        let t = if t < 0 { 0 } else { t as u64 };
        time::Duration::from_secs(t)
    }
}