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#![deny(missing_docs, warnings)]
#[macro_use]
extern crate slog;
extern crate chrono;
extern crate iron;
mod format;
pub use format::{LogContext, LogFormatter, DefaultLogFormatter};
use std::fmt;
use iron::{Request, Response, IronResult, Handler};
use slog::Logger;
struct Format<'req, 'res, 'a: 'req, 'b: 'a, 's, 'e, 'f, F: ?Sized + LogFormatter> {
context: LogContext<'req, 'res, 'a, 'b, 's, 'e>,
formatter: &'f F,
}
impl<'req, 'res, 'a: 'req, 'b: 'a, 's, 'e, 'f, F: ?Sized + LogFormatter> fmt::Display
for Format<'req, 'res, 'a, 'b, 's, 'e, 'f, F> {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
self.formatter.format(f, &self.context)
}
}
pub struct LoggerMiddleware<H: Handler, F: LogFormatter> {
formatter: F,
handler: H,
logger: Logger,
}
impl<H: Handler, F: LogFormatter> LoggerMiddleware<H, F> {
pub fn new(handler: H, logger: Logger, formatter: F) -> Self {
LoggerMiddleware {
handler,
logger,
formatter,
}
}
}
impl<H: Handler, F: LogFormatter> Handler for LoggerMiddleware<H, F> {
fn handle(&self, req: &mut Request) -> IronResult<Response> {
let start_time = chrono::Local::now();
let result = self.handler.handle(req);
let end_time = chrono::Local::now();
match result {
Ok(res) => {
info!(self.logger,
"{}",
Format {
context: LogContext {
req,
res: &res,
start_time: &start_time,
end_time: &end_time,
},
formatter: &self.formatter,
});
Ok(res)
}
Err(err) => {
error!(self.logger,
"{}",
Format {
context: LogContext {
req,
res: &err.response,
start_time: &start_time,
end_time: &end_time,
},
formatter: &self.formatter,
});
Err(err)
}
}
}
}