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refactor logger middleware

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This commit is contained in:
Nikolay Kim 2017-11-10 12:29:54 -08:00
parent 657efb8cce
commit 265628750c
11 changed files with 192 additions and 154 deletions
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2
README.md
View File

@ -134,7 +134,7 @@ fn main() {
HttpServer::new(
Application::default("/")
// enable logger
.middleware(middlewares::Logger::new(None))
.middleware(middlewares::Logger::default())
// websocket route
.resource("/ws/", |r| r.get::<MyWebSocket>())
.route_handler("/", StaticFiles::new("examples/static/", true)))

2
examples/basic.rs
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@ -49,7 +49,7 @@ fn main() {
HttpServer::new(
Application::default("/")
// enable logger
.middleware(middlewares::Logger::new(None))
.middleware(middlewares::Logger::default())
// register simple handle r, handle all methods
.handler("/index.html", index)
// with path parameters

2
examples/state.rs
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@ -74,7 +74,7 @@ fn main() {
HttpServer::new(
Application::builder("/", AppState{counter: Cell::new(0)})
// enable logger
.middleware(middlewares::Logger::new(None))
.middleware(middlewares::Logger::default())
// websocket route
.resource("/ws/", |r| r.get::<MyWebSocket>())
// register simple handler, handle all methods

2
examples/tls/src/main.rs
View File

@ -32,7 +32,7 @@ fn main() {
HttpServer::new(
Application::default("/")
// enable logger
.middleware(middlewares::Logger::new(None))
.middleware(middlewares::Logger::default())
// register simple handler, handle all methods
.handler("/index.html", index)
// with path parameters

2
examples/websocket.rs
View File

@ -73,7 +73,7 @@ fn main() {
HttpServer::new(
Application::default("/")
// enable logger
.middleware(middlewares::Logger::new(None))
.middleware(middlewares::Logger::default())
// websocket route
.resource("/ws/", |r| r.get::<MyWebSocket>())
.route_handler("/", StaticFiles::new("examples/static/", true)))

2
src/h1.rs
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@ -498,11 +498,9 @@ impl Reader {
let (len, method, path, version, headers_len) = {
let mut headers = [httparse::EMPTY_HEADER; MAX_HEADERS];
trace!("Request.parse([Header; {}], [u8; {}])", headers.len(), buf.len());
let mut req = httparse::Request::new(&mut headers);
match try!(req.parse(buf)) {
httparse::Status::Complete(len) => {
trace!("Request.parse Complete({})", len);
let method = Method::try_from(req.method.unwrap())
.map_err(|_| ParseError::Method)?;
let path = req.path.unwrap();

16
src/h1writer.rs
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@ -23,6 +23,8 @@ pub(crate) enum WriterState {
/// Send stream
pub(crate) trait Writer {
fn written(&self) -> u64;
fn start(&mut self, req: &mut HttpRequest, resp: &mut HttpResponse)
-> Result<WriterState, io::Error>;
@ -41,6 +43,8 @@ pub(crate) struct H1Writer<T: AsyncWrite> {
upgrade: bool,
keepalive: bool,
disconnected: bool,
written: u64,
headers_size: u64,
}
impl<T: AsyncWrite> H1Writer<T> {
@ -53,6 +57,8 @@ impl<T: AsyncWrite> H1Writer<T> {
upgrade: false,
keepalive: false,
disconnected: false,
written: 0,
headers_size: 0,
}
}
@ -80,6 +86,7 @@ impl<T: AsyncWrite> H1Writer<T> {
match stream.write(buffer.as_ref()) {
Ok(n) => {
buffer.split_to(n);
self.written += n as u64;
},
Err(ref e) if e.kind() == io::ErrorKind::WouldBlock => {
if buffer.len() > MAX_WRITE_BUFFER_SIZE {
@ -98,6 +105,14 @@ impl<T: AsyncWrite> H1Writer<T> {
impl<T: AsyncWrite> Writer for H1Writer<T> {
fn written(&self) -> u64 {
if self.written > self.headers_size {
self.written - self.headers_size
} else {
0
}
}
fn start(&mut self, req: &mut HttpRequest, msg: &mut HttpResponse)
-> Result<WriterState, io::Error>
{
@ -162,6 +177,7 @@ impl<T: AsyncWrite> Writer for H1Writer<T> {
// msg eof
buffer.extend(b"\r\n");
self.headers_size = buffer.len() as u64;
}
trace!("Response: {:?}", msg);

7
src/h2writer.rs
View File

@ -24,6 +24,7 @@ pub(crate) struct H2Writer {
encoder: PayloadEncoder,
disconnected: bool,
eof: bool,
written: u64,
}
impl H2Writer {
@ -36,6 +37,7 @@ impl H2Writer {
encoder: PayloadEncoder::default(),
disconnected: false,
eof: true,
written: 0,
}
}
@ -76,6 +78,7 @@ impl H2Writer {
let len = buffer.len();
let bytes = buffer.split_to(cmp::min(cap, len));
let eof = buffer.is_empty() && self.eof;
self.written += bytes.len() as u64;
if let Err(err) = stream.send_data(bytes.freeze(), eof) {
return Err(io::Error::new(io::ErrorKind::Other, err))
@ -98,6 +101,10 @@ impl H2Writer {
impl Writer for H2Writer {
fn written(&self) -> u64 {
self.written
}
fn start(&mut self, req: &mut HttpRequest, msg: &mut HttpResponse)
-> Result<WriterState, io::Error>
{

14
src/httpresponse.rs
View File

@ -34,6 +34,7 @@ pub struct HttpResponse {
encoding: ContentEncoding,
connection_type: Option<ConnectionType>,
error: Option<Box<Error>>,
response_size: u64,
}
impl HttpResponse {
@ -59,6 +60,7 @@ impl HttpResponse {
encoding: ContentEncoding::Auto,
connection_type: None,
error: None,
response_size: 0,
}
}
@ -75,6 +77,7 @@ impl HttpResponse {
encoding: ContentEncoding::Auto,
connection_type: None,
error: Some(Box::new(error)),
response_size: 0,
}
}
@ -196,6 +199,16 @@ impl HttpResponse {
pub fn replace_body<B: Into<Body>>(&mut self, body: B) -> Body {
mem::replace(&mut self.body, body.into())
}
/// Size of response in bytes, excluding HTTP headers
pub fn response_size(&self) -> u64 {
self.response_size
}
/// Set content encoding
pub(crate) fn set_response_size(&mut self, size: u64) {
self.response_size = size;
}
}
/// Helper conversion implementation
@ -433,6 +446,7 @@ impl HttpResponseBuilder {
encoding: parts.encoding,
connection_type: parts.connection_type,
error: None,
response_size: 0,
})
}

294
src/middlewares/logger.rs
View File

@ -1,36 +1,74 @@
//! Request logging middleware
use std::env;
use std::fmt;
use std::str::Chars;
use std::iter::Peekable;
use std::fmt::{Display, Formatter};
use time;
use regex::Regex;
use httprequest::HttpRequest;
use httpresponse::HttpResponse;
use middlewares::{Middleware, Started, Finished};
/// `Middleware` for logging request and response info to the terminal.
///
/// ## Usage
///
/// Create `Logger` middlewares with the specified `format`.
/// Default `Logger` could be created with `default` method, it uses the default format:
///
/// ```ignore
/// %a %t "%r" %s %b "%{Referrer}i" "%{User-Agent}i %T"
/// ```
/// ```rust,ignore
///
/// let app = Application::default("/")
/// .middleware(Logger::default())
/// .middleware(Logger::new("%a %{User-Agent}i"))
/// .finish()
/// ```
///
/// ## Format
///
/// `%%` The percent sign
///
/// `%a` Remote IP-address (IP-address of proxy if using reverse proxy)
///
/// `%t` Time when the request was started to process
///
/// `%P` The process ID of the child that serviced the request
///
/// `%r` First line of request
///
/// `%s` Response status code
///
/// `%b` Size of response in bytes, including HTTP headers
///
/// `%T` Time taken to serve the request, in seconds with floating fraction in .06f format
///
/// `%D` Time taken to serve the request, in milliseconds
///
/// `%{FOO}i` request.headers['FOO']
///
/// `%{FOO}o` response.headers['FOO']
///
/// `%{FOO}e` os.environ['FOO']
///
pub struct Logger {
format: Format,
}
impl Logger {
/// Create `Logger` middlewares with the specified `format`.
/// If a `None` is passed in, uses the default format:
///
/// ```ignore
/// {method} {uri} -> {status} ({response-time} ms)
/// ```
///
/// ```rust,ignore
/// let app = Application::default("/")
/// .middleware(Logger::new(None))
/// .finish()
/// ```
pub fn new(format: Option<Format>) -> Logger {
let format = format.unwrap_or_default();
Logger { format: format.clone() }
/// Create `Logger` middleware with the specified `format`.
pub fn new(format: &str) -> Logger {
Logger { format: Format::new(format) }
}
}
impl Default for Logger {
/// Create default `Logger` middleware
fn default() -> Logger {
Logger { format: Format::default() }
}
}
@ -43,28 +81,58 @@ impl Logger {
let response_time = time::now() - entry_time;
let response_time_ms = (response_time.num_seconds() * 1000) as f64 +
(response_time.num_nanoseconds().unwrap_or(0) as f64) / 1000000000.0;
(response_time.num_nanoseconds().unwrap_or(0) as f64) / 1000000.0;
{
let render = |fmt: &mut Formatter, text: &FormatText| {
match *text {
FormatText::Str(ref string) => fmt.write_str(string),
FormatText::Method => req.method().fmt(fmt),
FormatText::URI => {
FormatText::Percent => "%".fmt(fmt),
FormatText::RequestLine => {
if req.query_string().is_empty() {
fmt.write_fmt(format_args!("{}", req.path()))
fmt.write_fmt(format_args!(
"{} {} {:?}",
req.method(), req.path(), req.version()))
} else {
fmt.write_fmt(format_args!("{}?{}", req.path(), req.query_string()))
fmt.write_fmt(format_args!(
"{} {}?{} {:?}",
req.method(), req.path(), req.query_string(), req.version()))
}
},
FormatText::Status => resp.status().fmt(fmt),
FormatText::ResponseTime =>
fmt.write_fmt(format_args!("{} sec", response_time_ms)),
FormatText::ResponseStatus => resp.status().as_u16().fmt(fmt),
FormatText::ResponseSize => resp.response_size().fmt(fmt),
FormatText::Time =>
fmt.write_fmt(format_args!("{:.6}", response_time_ms/1000.0)),
FormatText::TimeMillis =>
fmt.write_fmt(format_args!("{:.6}", response_time_ms)),
FormatText::RemoteAddr => Ok(()), //req.remote_addr.fmt(fmt),
FormatText::RequestTime => {
entry_time.strftime("%Y-%m-%dT%H:%M:%S.%fZ%z")
entry_time.strftime("[%d/%b/%Y:%H:%M:%S %z]")
.unwrap()
.fmt(fmt)
}
FormatText::RequestHeader(ref name) => {
let s = if let Some(val) = req.headers().get(name) {
if let Ok(s) = val.to_str() { s } else { "-" }
} else {
"-"
};
fmt.write_fmt(format_args!("{}", s))
}
FormatText::ResponseHeader(ref name) => {
let s = if let Some(val) = resp.headers().get(name) {
if let Ok(s) = val.to_str() { s } else { "-" }
} else {
"-"
};
fmt.write_fmt(format_args!("{}", s))
}
FormatText::EnvironHeader(ref name) => {
if let Ok(val) = env::var(name) {
fmt.write_fmt(format_args!("{}", val))
} else {
"-".fmt(fmt)
}
}
}
};
@ -87,46 +155,72 @@ impl Middleware for Logger {
}
use self::FormatText::{Method, URI, Status, ResponseTime, RemoteAddr, RequestTime};
/// A formatting style for the `Logger`, consisting of multiple
/// `FormatText`s concatenated into one line.
#[derive(Clone)]
#[doc(hidden)]
pub struct Format(Vec<FormatText>);
struct Format(Vec<FormatText>);
impl Default for Format {
/// Return the default formatting style for the `Logger`:
///
/// ```ignore
/// {method} {uri} -> {status} ({response-time})
/// // This will be written as: {method} {uri} -> {status} ({response-time})
/// %a %t "%r" %s %b "%{Referrer}i" "%{User-Agent}i %T"
/// ```
fn default() -> Format {
Format::new("{method} {uri} {status} ({response-time})").unwrap()
Format::new(r#"%a %t "%r" %s %b "%{Referrer}i" "%{User-Agent}i" %T"#)
}
}
impl Format {
/// Create a `Format` from a format string, which can contain the fields
/// `{method}`, `{uri}`, `{status}`, `{response-time}`, `{ip-addr}` and
/// `{request-time}`.
/// Create a `Format` from a format string.
///
/// Returns `None` if the format string syntax is incorrect.
pub fn new(s: &str) -> Option<Format> {
let parser = FormatParser::new(s.chars().peekable());
pub fn new(s: &str) -> Format {
trace!("Access log format: {}", s);
let fmt = Regex::new(r"%(\{([A-Za-z0-9\-_]+)\}([ioe])|[atPrsbTD]?)").unwrap();
let mut idx = 0;
let mut results = Vec::new();
for cap in fmt.captures_iter(s) {
let m = cap.get(0).unwrap();
let pos = m.start();
if idx != pos {
results.push(FormatText::Str(s[idx..pos].to_owned()));
}
idx = m.end();
for unit in parser {
match unit {
Some(unit) => results.push(unit),
None => return None
if let Some(key) = cap.get(2) {
results.push(
match cap.get(3).unwrap().as_str() {
"i" => FormatText::RequestHeader(key.as_str().to_owned()),
"o" => FormatText::ResponseHeader(key.as_str().to_owned()),
"e" => FormatText::EnvironHeader(key.as_str().to_owned()),
_ => unreachable!(),
})
} else {
let m = cap.get(1).unwrap();
results.push(
match m.as_str() {
"%" => FormatText::Percent,
"a" => FormatText::RemoteAddr,
"t" => FormatText::RequestTime,
"P" => FormatText::Percent,
"r" => FormatText::RequestLine,
"s" => FormatText::ResponseStatus,
"b" => FormatText::ResponseSize,
"T" => FormatText::Time,
"D" => FormatText::TimeMillis,
_ => FormatText::Str(m.as_str().to_owned()),
}
);
}
}
if idx != s.len() {
results.push(FormatText::Str(s[idx..].to_owned()));
}
Some(Format(results))
Format(results)
}
}
@ -151,117 +245,25 @@ impl<'a> ContextDisplay<'a> for Format {
}
}
struct FormatParser<'a> {
// The characters of the format string.
chars: Peekable<Chars<'a>>,
// A reusable buffer for parsing style attributes.
object_buffer: String,
finished: bool
}
impl<'a> FormatParser<'a> {
fn new(chars: Peekable<Chars>) -> FormatParser {
FormatParser {
chars: chars,
// No attributes are longer than 14 characters, so we can avoid reallocating.
object_buffer: String::with_capacity(14),
finished: false
}
}
}
// Some(None) means there was a parse error and this FormatParser should be abandoned.
impl<'a> Iterator for FormatParser<'a> {
type Item = Option<FormatText>;
fn next(&mut self) -> Option<Option<FormatText>> {
// If the parser has been cancelled or errored for some reason.
if self.finished { return None }
// Try to parse a new FormatText.
match self.chars.next() {
// Parse a recognized object.
//
// The allowed forms are:
// - {method}
// - {uri}
// - {status}
// - {response-time}
// - {ip-addr}
// - {request-time}
Some('{') => {
self.object_buffer.clear();
let mut chr = self.chars.next();
while chr != None {
match chr.unwrap() {
// Finished parsing, parse buffer.
'}' => break,
c => self.object_buffer.push(c)
}
chr = self.chars.next();
}
let text = match self.object_buffer.as_ref() {
"method" => Method,
"uri" => URI,
"status" => Status,
"response-time" => ResponseTime,
"request-time" => RequestTime,
"ip-addr" => RemoteAddr,
_ => {
// Error, so mark as finished.
self.finished = true;
return Some(None);
}
};
Some(Some(text))
}
// Parse a regular string part of the format string.
Some(c) => {
let mut buffer = String::new();
buffer.push(c);
loop {
match self.chars.peek() {
// Done parsing.
Some(&'{') | None => return Some(Some(FormatText::Str(buffer))),
Some(_) => {
buffer.push(self.chars.next().unwrap())
}
}
}
},
// Reached end of the format string.
None => None
}
}
}
/// A string of text to be logged. This is either one of the data
/// fields supported by the `Logger`, or a custom `String`.
#[derive(Clone)]
#[doc(hidden)]
#[derive(Debug, Clone)]
pub enum FormatText {
Str(String),
Method,
URI,
Status,
ResponseTime,
Percent,
RequestLine,
RequestTime,
ResponseStatus,
ResponseSize,
Time,
TimeMillis,
RemoteAddr,
RequestTime
RequestHeader(String),
ResponseHeader(String),
EnvironHeader(String),
}
pub(crate) struct FormatDisplay<'a> {
format: &'a Format,
render: &'a Fn(&mut Formatter, &FormatText) -> Result<(), fmt::Error>,

3
src/task.rs
View File

@ -277,7 +277,8 @@ impl Task {
// response is completed
if self.iostate.is_done() {
// finish middlewares
if let Some(ref resp) = self.prepared {
if let Some(ref mut resp) = self.prepared {
resp.set_response_size(io.written());
match self.middlewares.finishing(req, resp) {
Ok(Async::NotReady) => return Ok(Async::NotReady),
_ => (),