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
use std::collections::HashMap;
use actix::prelude::*;
use super::messages::*;
use super::Save;
use crate::errors::*;
#[derive(Clone, Default)]
pub struct HashCache(HashMap<String, u32>);
impl HashCache {
fn save(&mut self, config: Cache) -> CaptchaResult<()> {
self.0.insert(config.string, config.difficulty_factor);
Ok(())
}
fn retrive(&mut self, string: String) -> CaptchaResult<Option<u32>> {
if let Some(difficulty_factor) = self.remove(&string) {
Ok(Some(difficulty_factor.to_owned()))
} else {
Ok(None)
}
}
fn remove(&mut self, string: &str) -> Option<u32> {
self.0.remove(string)
}
}
impl Save for HashCache {}
impl Actor for HashCache {
type Context = Context<Self>;
}
impl Handler<Cache> for HashCache {
type Result = MessageResult<Cache>;
fn handle(&mut self, msg: Cache, ctx: &mut Self::Context) -> Self::Result {
use actix::clock::delay_for;
use std::time::Duration;
let addr = ctx.address();
let del_msg = DeleteString(msg.string.clone());
let duration: Duration = Duration::new(msg.duration.clone(), 0);
let wait_for = async move {
delay_for(duration).await;
addr.send(del_msg).await.unwrap().unwrap();
}
.into_actor(self);
ctx.spawn(wait_for);
MessageResult(self.save(msg))
}
}
impl Handler<DeleteString> for HashCache {
type Result = MessageResult<DeleteString>;
fn handle(&mut self, msg: DeleteString, _ctx: &mut Self::Context) -> Self::Result {
self.remove(&msg.0);
MessageResult(Ok(()))
}
}
impl Handler<Retrive> for HashCache {
type Result = MessageResult<Retrive>;
fn handle(&mut self, msg: Retrive, _ctx: &mut Self::Context) -> Self::Result {
MessageResult(self.retrive(msg.0))
}
}
#[cfg(test)]
mod tests {
use super::*;
use crate::mcaptcha::VisitorResult;
use crate::pow::PoWConfig;
async fn sleep(time: u64) {
use actix::clock::delay_for;
use std::time::Duration;
let duration: Duration = Duration::new(time, 0);
delay_for(duration).await;
}
#[actix_rt::test]
async fn hashcache_works() {
const DIFFICULTY_FACTOR: u32 = 54;
const DURATION: u64 = 5;
let addr = HashCache::default().start();
let pow: PoWConfig = PoWConfig::new(DIFFICULTY_FACTOR);
let visitor_result = VisitorResult {
difficulty_factor: DIFFICULTY_FACTOR,
duration: DURATION,
};
let string = pow.string.clone();
let msg = Cache::new(&pow, &visitor_result);
addr.send(msg).await.unwrap().unwrap();
let cache_difficulty_factor = addr.send(Retrive(string.clone())).await.unwrap().unwrap();
assert_eq!(DIFFICULTY_FACTOR, cache_difficulty_factor.unwrap());
sleep(DURATION + DURATION).await;
let expired_string = addr.send(Retrive(string)).await.unwrap().unwrap();
assert_eq!(None, expired_string);
}
}