74 lines
1.8 KiB
Rust
74 lines
1.8 KiB
Rust
use crate::error::{AppError, ErrorCode};
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use crate::state::AppState;
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use chrono::{Duration, Utc};
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use std::net::IpAddr;
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pub async fn consume_anonymous_units(
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state: &AppState,
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session_id: &str,
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ip: IpAddr,
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units: u32,
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) -> Result<(), AppError> {
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if units == 0 {
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return Ok(());
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}
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let date = utc8_date();
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let session_key = format!("anon_quota:{session_id}:{date}");
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let ip_key = format!("anon_quota_ip:{ip}:{date}");
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let mut conn = state.redis.clone();
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let limit = state.config.anon_daily_units as i64;
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let ttl_seconds = 48 * 60 * 60;
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let inc = units as i64;
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let script = redis::Script::new(
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r#"
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local limit = tonumber(ARGV[1])
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local ttl = tonumber(ARGV[2])
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local inc = tonumber(ARGV[3])
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local v1 = tonumber(redis.call('GET', KEYS[1]) or '0')
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local v2 = tonumber(redis.call('GET', KEYS[2]) or '0')
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if v1 + inc > limit or v2 + inc > limit then
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return -1
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end
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v1 = redis.call('INCRBY', KEYS[1], inc)
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v2 = redis.call('INCRBY', KEYS[2], inc)
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if v1 == inc then redis.call('EXPIRE', KEYS[1], ttl) end
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if v2 == inc then redis.call('EXPIRE', KEYS[2], ttl) end
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return v1
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"#,
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);
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let new_value: i64 = script
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.key(session_key)
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.key(ip_key)
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.arg(limit)
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.arg(ttl_seconds)
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.arg(inc)
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.invoke_async(&mut conn)
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.await
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.map_err(|err| AppError::new(ErrorCode::Internal, "匿名配额检查失败").with_source(err))?;
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if new_value < 0 {
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return Err(AppError::new(
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ErrorCode::QuotaExceeded,
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"匿名试用次数已用完（每日 10 次）",
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));
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}
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Ok(())
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}
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fn utc8_date() -> String {
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let now = Utc::now() + Duration::hours(8);
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now.format("%Y-%m-%d").to_string()
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}
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