Allow to exclude certain endpoints from logging #211

CHANGES.md

@@ -8,6 +8,8 @@
 
 * Send `ErrorNotFound` instead of `ErrorBadRequest` when path extractor fails #214
 
+* Allow to exclude certain endpoints from logging #211
+
 ## 0.6.0 (2018-05-08)
 
 * Add route scopes #202

src/middleware/logger.rs

@@ -1,7 +1,7 @@
 //! Request logging middleware
+use std::collections::HashSet;
 use std::env;
-use std::fmt;
+use std::fmt::{self, Display, Formatter};
-use std::fmt::{Display, Formatter};
 
 use libc;
 use regex::Regex;
@@ -74,6 +74,7 @@ use middleware::{Finished, Middleware, Started};
 ///
 pub struct Logger {
     format: Format,
+    exclude: HashSet<String>,
 }
 
 impl Logger {
@@ -81,8 +82,15 @@ impl Logger {
     pub fn new(format: &str) -> Logger {
         Logger {
             format: Format::new(format),
+            exclude: HashSet::new(),
         }
     }
+
+    /// Ignore and do not log access info for specified path.
+    pub fn exclude<T: Into<String>>(mut self, path: T) -> Self {
+        self.exclude.insert(path.into());
+        self
+    }
 }
 
 impl Default for Logger {
@@ -94,6 +102,7 @@ impl Default for Logger {
     fn default() -> Logger {
         Logger {
             format: Format::default(),
+            exclude: HashSet::new(),
         }
     }
 }
@@ -102,21 +111,23 @@ struct StartTime(time::Tm);
 
 impl Logger {
     fn log<S>(&self, req: &mut HttpRequest<S>, resp: &HttpResponse) {
-        let entry_time = req.extensions().get::<StartTime>().unwrap().0;
+        if let Some(entry_time) = req.extensions().get::<StartTime>() {
-
             let render = |fmt: &mut Formatter| {
                 for unit in &self.format.0 {
-                unit.render(fmt, req, resp, entry_time)?;
+                    unit.render(fmt, req, resp, entry_time.0)?;
                 }
                 Ok(())
             };
             info!("{}", FormatDisplay(&render));
         }
     }
+}
 
 impl<S> Middleware<S> for Logger {
     fn start(&self, req: &mut HttpRequest<S>) -> Result<Started> {
+        if !self.exclude.contains(req.path()) {
             req.extensions_mut().insert(StartTime(time::now()));
+        }
         Ok(Started::Done)
     }