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class="string">"session"</span>)] </span><span class="kw">use </span>actix_session::SessionExt <span class="kw">as _</span>; <span class="kw">use </span>actix_web::dev::ServiceRequest; <span class="kw">use </span>redis::Client; <span class="kw">use crate</span>::{errors::Error, GetArcBoxKeyFn, Limiter}; <span class="doccomment">/// Rate limiter builder. </span><span class="attr">#[derive(Debug)] </span><span class="kw">pub struct </span>Builder { <span class="kw">pub</span>(<span class="kw">crate</span>) redis_url: String, <span class="kw">pub</span>(<span class="kw">crate</span>) limit: usize, <span class="kw">pub</span>(<span class="kw">crate</span>) period: Duration, <span class="kw">pub</span>(<span class="kw">crate</span>) get_key_fn: <span class="prelude-ty">Option</span><GetArcBoxKeyFn>, <span class="kw">pub</span>(<span class="kw">crate</span>) cookie_name: Cow<<span class="lifetime">'static</span>, str>, <span class="attr">#[cfg(feature = <span class="string">"session"</span>)] </span><span class="kw">pub</span>(<span class="kw">crate</span>) session_key: Cow<<span class="lifetime">'static</span>, str>, } <span class="kw">impl </span>Builder { <span class="doccomment">/// Set upper limit. </span><span class="kw">pub fn </span>limit(<span class="kw-2">&mut </span><span class="self">self</span>, limit: usize) -> <span class="kw-2">&mut </span><span class="self">Self </span>{ <span class="self">self</span>.limit = limit; <span class="self">self </span>} <span class="doccomment">/// Set limit window/period. </span><span class="kw">pub fn </span>period(<span class="kw-2">&mut </span><span class="self">self</span>, period: Duration) -> <span class="kw-2">&mut </span><span class="self">Self </span>{ <span class="self">self</span>.period = period; <span class="self">self </span>} <span class="doccomment">/// Sets rate limit key derivation function. /// /// Should not be used in combination with `cookie_name` or `session_key` as they conflict. </span><span class="kw">pub fn </span>key_by<F>(<span class="kw-2">&mut </span><span class="self">self</span>, resolver: F) -> <span class="kw-2">&mut </span><span class="self">Self </span><span class="kw">where </span>F: Fn(<span class="kw-2">&</span>ServiceRequest) -> <span class="prelude-ty">Option</span><String> + Send + Sync + <span class="lifetime">'static</span>, { <span class="self">self</span>.get_key_fn = <span class="prelude-val">Some</span>(Arc::new(resolver)); <span class="self">self </span>} <span class="doccomment">/// Sets name of cookie to be sent. /// /// This method should not be used in combination of `key_by` as they conflict. </span><span class="attr">#[deprecated = <span class="string">"Prefer `key_by`."</span>] </span><span class="kw">pub fn </span>cookie_name(<span class="kw-2">&mut </span><span class="self">self</span>, cookie_name: <span class="kw">impl </span>Into<Cow<<span class="lifetime">'static</span>, str>>) -> <span class="kw-2">&mut </span><span class="self">Self </span>{ <span class="kw">if </span><span class="self">self</span>.get_key_fn.is_some() { <span class="macro">panic!</span>(<span class="string">"This method should not be used in combination of get_key as they overwrite each other"</span>) } <span class="self">self</span>.cookie_name = cookie_name.into(); <span class="self">self </span>} <span class="doccomment">/// Sets session key to be used in backend. /// /// This method should not be used in combination of `key_by` as they conflict. </span><span class="attr">#[deprecated = <span class="string">"Prefer `key_by`."</span>] #[cfg(feature = <span class="string">"session"</span>)] </span><span class="kw">pub fn </span>session_key(<span class="kw-2">&mut </span><span class="self">self</span>, session_key: <span class="kw">impl </span>Into<Cow<<span class="lifetime">'static</span>, str>>) -> <span class="kw-2">&mut </span><span class="self">Self </span>{ <span class="kw">if </span><span class="self">self</span>.get_key_fn.is_some() { <span class="macro">panic!</span>(<span class="string">"This method should not be used in combination of get_key as they overwrite each other"</span>) } <span class="self">self</span>.session_key = session_key.into(); <span class="self">self </span>} <span class="doccomment">/// Finalizes and returns a `Limiter`. /// /// Note that this method will connect to the Redis server to test its connection which is a /// **synchronous** operation. </span><span class="kw">pub fn </span>build(<span class="kw-2">&mut </span><span class="self">self</span>) -> <span class="prelude-ty">Result</span><Limiter, Error> { <span class="kw">let </span>get_key = <span class="kw">if let </span><span class="prelude-val">Some</span>(resolver) = <span class="self">self</span>.get_key_fn.clone() { resolver } <span class="kw">else </span>{ <span class="kw">let </span>cookie_name = <span class="self">self</span>.cookie_name.clone(); <span class="attr">#[cfg(feature = <span class="string">"session"</span>)] </span><span class="kw">let </span>session_key = <span class="self">self</span>.session_key.clone(); <span class="kw">let </span>closure: GetArcBoxKeyFn = Arc::new(Box::new(<span class="kw">move </span>|req: <span class="kw-2">&</span>ServiceRequest| { <span class="attr">#[cfg(feature = <span class="string">"session"</span>)] </span><span class="kw">let </span>res = req .get_session() .get(<span class="kw-2">&</span>session_key) .unwrap_or_else(|<span class="kw">_</span>| req.cookie(<span class="kw-2">&</span>cookie_name).map(|c| c.to_string())); <span class="attr">#[cfg(not(feature = <span class="string">"session"</span>))] </span><span class="kw">let </span>res = req.cookie(<span class="kw-2">&</span>cookie_name).map(|c| c.to_string()); res })); closure }; <span class="prelude-val">Ok</span>(Limiter { client: Client::open(<span class="self">self</span>.redis_url.as_str())<span class="question-mark">?</span>, limit: <span class="self">self</span>.limit, period: <span class="self">self</span>.period, get_key_fn: get_key, }) } } <span class="attr">#[cfg(test)] </span><span class="kw">mod </span>tests { <span class="kw">use super</span>::<span class="kw-2">*</span>; <span class="attr">#[test] </span><span class="kw">fn </span>test_create_builder() { <span class="kw">let </span>redis_url = <span class="string">"redis://127.0.0.1"</span>; <span class="kw">let </span>period = Duration::from_secs(<span class="number">10</span>); <span class="kw">let </span>builder = Builder { redis_url: redis_url.to_owned(), limit: <span class="number">100</span>, period, get_key_fn: <span class="prelude-val">Some</span>(Arc::new(|<span class="kw">_</span>| <span class="prelude-val">None</span>)), cookie_name: Cow::Owned(<span class="string">"session"</span>.to_string()), <span class="attr">#[cfg(feature = <span class="string">"session"</span>)] </span>session_key: Cow::Owned(<span class="string">"rate-api"</span>.to_string()), }; <span class="macro">assert_eq!</span>(builder.redis_url, redis_url); <span class="macro">assert_eq!</span>(builder.limit, <span class="number">100</span>); <span class="macro">assert_eq!</span>(builder.period, period); <span class="attr">#[cfg(feature = <span class="string">"session"</span>)] </span><span class="macro">assert_eq!</span>(builder.session_key, <span class="string">"rate-api"</span>); <span class="macro">assert_eq!</span>(builder.cookie_name, <span class="string">"session"</span>); } <span class="attr">#[test] </span><span class="kw">fn </span>test_create_limiter() { <span class="kw">let </span>redis_url = <span class="string">"redis://127.0.0.1"</span>; <span class="kw">let </span>period = Duration::from_secs(<span class="number">20</span>); <span class="kw">let </span><span class="kw-2">mut </span>builder = Builder { redis_url: redis_url.to_owned(), limit: <span class="number">100</span>, period: Duration::from_secs(<span class="number">10</span>), get_key_fn: <span class="prelude-val">Some</span>(Arc::new(|<span class="kw">_</span>| <span class="prelude-val">None</span>)), cookie_name: Cow::Borrowed(<span class="string">"sid"</span>), <span class="attr">#[cfg(feature = <span class="string">"session"</span>)] </span>session_key: Cow::Borrowed(<span class="string">"key"</span>), }; <span class="kw">let </span>limiter = builder.limit(<span class="number">200</span>).period(period).build().unwrap(); <span class="macro">assert_eq!</span>(limiter.limit, <span class="number">200</span>); <span class="macro">assert_eq!</span>(limiter.period, period); } <span class="attr">#[test] #[should_panic = <span class="string">"Redis URL did not parse"</span>] </span><span class="kw">fn </span>test_create_limiter_error() { <span class="kw">let </span>redis_url = <span class="string">"127.0.0.1"</span>; <span class="kw">let </span>period = Duration::from_secs(<span class="number">20</span>); <span class="kw">let </span><span class="kw-2">mut </span>builder = Builder { redis_url: redis_url.to_owned(), limit: <span class="number">100</span>, period: Duration::from_secs(<span class="number">10</span>), get_key_fn: <span class="prelude-val">Some</span>(Arc::new(|<span class="kw">_</span>| <span class="prelude-val">None</span>)), cookie_name: Cow::Borrowed(<span class="string">"sid"</span>), <span class="attr">#[cfg(feature = <span class="string">"session"</span>)] </span>session_key: Cow::Borrowed(<span class="string">"key"</span>), }; builder.limit(<span class="number">200</span>).period(period).build().unwrap(); } } </code></pre></div></section></main></body></html>