Use logging instead of println

The println!() macro just prints to stdout. The log macros may output to
any output.

Author: rnestler

src/server/handlers.rs

@@ -89,7 +89,7 @@ impl middleware::Handler for ReadHandler {
     /// Return the current status JSON.
     fn handle(&self, req: &mut Request) -> IronResult<Response> {
 
-        println!("{} /{} from {}", req.method, req.url.path[0], req.remote_addr);
+        info!("{} /{} from {}", req.method, req.url.path[0], req.remote_addr);
 
         // Get response body
         let body = self.build_response_json().to_string();
@@ -175,8 +175,8 @@ impl middleware::Handler for UpdateHandler {
     /// Update the sensor, return correct status code.
     fn handle(&self, req: &mut Request) -> IronResult<Response> {
 
-        // TODO: create macro for these println! invocations.
-        println!("{} /{} from {}", req.method, req.url.path[0], req.remote_addr);
+        // TODO: create macro for these info! invocations.
+        info!("{} /{} from {}", req.method, req.url.path[0], req.remote_addr);
 
         // Get sensor name
         let sensor_name;