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use std::mem; use std::fmt; use std::io::{self, Read}; use std::net::SocketAddr; use std::time::Duration; use futures::{Async, Poll, Stream}; use http; use serde::de::DeserializeOwned; use cookie; use client::KeepCoreThreadAlive; use hyper::header::HeaderMap; use {async_impl, StatusCode, Url, Version, wait}; /// A Response to a submitted `Request`. pub struct Response { inner: async_impl::Response, body: Option<async_impl::ReadableChunks<WaitBody>>, timeout: Option<Duration>, _thread_handle: KeepCoreThreadAlive, } impl fmt::Debug for Response { fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { fmt::Debug::fmt(&self.inner, f) } } impl Response { pub(crate) fn new(res: async_impl::Response, timeout: Option<Duration>, thread: KeepCoreThreadAlive) -> Response { Response { inner: res, body: None, timeout, _thread_handle: thread, } } /// Get the `StatusCode` of this `Response`. /// /// # Examples /// /// Checking for general status class: /// /// ```rust /// # fn run() -> Result<(), Box<::std::error::Error>> { /// let resp = reqwest::get("http://httpbin.org/get")?; /// if resp.status().is_success() { /// println!("success!"); /// } else if resp.status().is_server_error() { /// println!("server error!"); /// } else { /// println!("Something else happened. Status: {:?}", resp.status()); /// } /// # Ok(()) /// # } /// ``` /// /// Checking for specific status codes: /// /// ```rust /// use reqwest::Client; /// use reqwest::StatusCode; /// # fn run() -> Result<(), Box<::std::error::Error>> { /// let client = Client::new(); /// /// let resp = client.post("http://httpbin.org/post") /// .body("possibly too large") /// .send()?; /// /// match resp.status() { /// StatusCode::OK => println!("success!"), /// StatusCode::PAYLOAD_TOO_LARGE => { /// println!("Request payload is too large!"); /// } /// s => println!("Received response status: {:?}", s), /// }; /// # Ok(()) /// # } /// ``` #[inline] pub fn status(&self) -> StatusCode { self.inner.status() } /// Get the `Headers` of this `Response`. /// /// # Example /// /// Saving an etag when caching a file: /// /// ``` /// use reqwest::Client; /// use reqwest::header::ETAG; /// /// # fn run() -> Result<(), Box<::std::error::Error>> { /// let client = Client::new(); /// /// let mut resp = client.get("http://httpbin.org/cache").send()?; /// if resp.status().is_success() { /// if let Some(etag) = resp.headers().get(ETAG) { /// std::fs::write("etag", etag.as_bytes()); /// } /// let mut file = std::fs::File::create("file")?; /// resp.copy_to(&mut file)?; /// } /// # Ok(()) /// # } /// ``` #[inline] pub fn headers(&self) -> &HeaderMap { self.inner.headers() } /// Retrieve the cookies contained in the response. /// /// Note that invalid 'Set-Cookie' headers will be ignored. pub fn cookies<'a>(&'a self) -> impl Iterator< Item = cookie::Cookie<'a> > + 'a { cookie::extract_response_cookies(self.headers()) .filter_map(Result::ok) } /// Get the HTTP `Version` of this `Response`. #[inline] pub fn version(&self) -> Version { self.inner.version() } /// Get the final `Url` of this `Response`. /// /// # Example /// /// ```rust /// # fn run() -> Result<(), Box<::std::error::Error>> { /// let resp = reqwest::get("http://httpbin.org/redirect/1")?; /// assert_eq!(resp.url().as_str(), "http://httpbin.org/get"); /// # Ok(()) /// # } /// ``` #[inline] pub fn url(&self) -> &Url { self.inner.url() } /// Get the remote address used to get this `Response`. /// /// # Example /// /// ```rust /// # fn run() -> Result<(), Box<::std::error::Error>> { /// let resp = reqwest::get("http://httpbin.org/redirect/1")?; /// println!("httpbin.org address: {:?}", resp.remote_addr()); /// # Ok(()) /// # } /// ``` pub fn remote_addr(&self) -> Option<SocketAddr> { self.inner.remote_addr() } /// Get the content-length of the response, if it is known. /// /// Reasons it may not be known: /// /// - The server didn't send a `content-length` header. /// - The response is gzipped and automatically decoded (thus changing /// the actual decoded length). pub fn content_length(&self) -> Option<u64> { self.inner.content_length() } /// Try and deserialize the response body as JSON using `serde`. /// /// # Examples /// /// ```rust /// # extern crate reqwest; /// # extern crate serde; /// # /// # use reqwest::Error; /// # use serde::Deserialize; /// # /// #[derive(Deserialize)] /// struct Ip { /// origin: String, /// } /// /// # fn run() -> Result<(), Error> { /// let json: Ip = reqwest::get("http://httpbin.org/ip")?.json()?; /// # Ok(()) /// # } /// # /// # fn main() { } /// ``` /// /// # Errors /// /// This method fails whenever the response body is not in JSON format /// or it cannot be properly deserialized to target type `T`. For more /// details please see [`serde_json::from_reader`]. /// [`serde_json::from_reader`]: https://docs.serde.rs/serde_json/fn.from_reader.html #[inline] pub fn json<T: DeserializeOwned>(&mut self) -> ::Result<T> { wait::timeout(self.inner.json(), self.timeout).map_err(|e| { match e { wait::Waited::TimedOut => ::error::timedout(None), wait::Waited::Inner(e) => e, } }) } /// Get the response text. /// /// This method decodes the response body with BOM sniffing /// and with malformed sequences replaced with the REPLACEMENT CHARACTER. /// Encoding is determinated from the `charset` parameter of `Content-Type` header, /// and defaults to `utf-8` if not presented. /// /// # Example /// /// ```rust /// # extern crate reqwest; /// # fn run() -> Result<(), Box<::std::error::Error>> { /// let content = reqwest::get("http://httpbin.org/range/26")?.text()?; /// # Ok(()) /// # } /// ``` /// /// # Note /// /// This consumes the body. Trying to read more, or use of `response.json()` /// will return empty values. pub fn text(&mut self) -> ::Result<String> { self.text_with_charset("utf-8") } /// Get the response text given a specific encoding. /// /// This method decodes the response body with BOM sniffing /// and with malformed sequences replaced with the REPLACEMENT CHARACTER. /// You can provide a default encoding for decoding the raw message, while the /// `charset` parameter of `Content-Type` header is still prioritized. For more information /// about the possible encoding name, please go to /// https://docs.rs/encoding_rs/0.8.17/encoding_rs/#relationship-with-windows-code-pages /// /// # Example /// /// ```rust /// # extern crate reqwest; /// # fn run() -> Result<(), Box<::std::error::Error>> { /// let content = reqwest::get("http://httpbin.org/range/26")?.text_with_charset("utf-8")?; /// # Ok(()) /// # } /// ``` /// /// # Note /// /// This consumes the body. Trying to read more, or use of `response.json()` /// will return empty values. pub fn text_with_charset(&mut self, default_encoding: &str) -> ::Result<String> { wait::timeout(self.inner.text_with_charset(default_encoding), self.timeout).map_err(|e| { match e { wait::Waited::TimedOut => ::error::timedout(None), wait::Waited::Inner(e) => e, } }) } /// Copy the response body into a writer. /// /// This function internally uses [`std::io::copy`] and hence will continuously read data from /// the body and then write it into writer in a streaming fashion until EOF is met. /// /// On success, the total number of bytes that were copied to `writer` is returned. /// /// [`std::io::copy`]: https://doc.rust-lang.org/std/io/fn.copy.html /// /// # Example /// /// ```rust /// # fn run() -> Result<(), Box<::std::error::Error>> { /// let mut resp = reqwest::get("http://httpbin.org/range/5")?; /// let mut buf: Vec<u8> = vec![]; /// resp.copy_to(&mut buf)?; /// assert_eq!(b"abcde", buf.as_slice()); /// # Ok(()) /// # } /// ``` #[inline] pub fn copy_to<W: ?Sized>(&mut self, w: &mut W) -> ::Result<u64> where W: io::Write { io::copy(self, w).map_err(::error::from) } /// Turn a response into an error if the server returned an error. /// /// # Example /// /// ```rust,no_run /// # extern crate reqwest; /// # fn run() -> Result<(), Box<::std::error::Error>> { /// let res = reqwest::get("http://httpbin.org/status/400")? /// .error_for_status(); /// if let Err(err) = res { /// assert_eq!(err.status(), Some(reqwest::StatusCode::BAD_REQUEST)); /// } /// # Ok(()) /// # } /// # fn main() {} /// ``` #[inline] pub fn error_for_status(self) -> ::Result<Self> { let Response { body, inner, timeout, _thread_handle } = self; inner.error_for_status().map(move |inner| { Response { inner, body, timeout, _thread_handle, } }) } /// Turn a reference to a response into an error if the server returned an error. /// /// # Example /// /// ```rust,no_run /// # extern crate reqwest; /// # fn run() -> Result<(), Box<::std::error::Error>> { /// let res = reqwest::get("http://httpbin.org/status/400")?; /// let res = res.error_for_status_ref(); /// if let Err(err) = res { /// assert_eq!(err.status(), Some(reqwest::StatusCode::BAD_REQUEST)); /// } /// # Ok(()) /// # } /// # fn main() {} /// ``` #[inline] pub fn error_for_status_ref(&self) -> ::Result<&Self> { self.inner.error_for_status_ref().and_then(|_| Ok(self)) } } impl Read for Response { #[inline] fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> { if self.body.is_none() { let body = mem::replace(self.inner.body_mut(), async_impl::Decoder::empty()); let body = async_impl::ReadableChunks::new(WaitBody { inner: wait::stream(body, self.timeout) }); self.body = Some(body); } let mut body = self.body.take().unwrap(); let bytes = body.read(buf); self.body = Some(body); bytes } } struct WaitBody { inner: wait::WaitStream<async_impl::Decoder> } impl Stream for WaitBody { type Item = <async_impl::Decoder as Stream>::Item; type Error = <async_impl::Decoder as Stream>::Error; fn poll(&mut self) -> Poll<Option<Self::Item>, Self::Error> { match self.inner.next() { Some(Ok(chunk)) => Ok(Async::Ready(Some(chunk))), Some(Err(e)) => { let req_err = match e { wait::Waited::TimedOut => ::error::timedout(None), wait::Waited::Inner(e) => e, }; Err(req_err) }, None => Ok(Async::Ready(None)), } } } impl<T: Into<async_impl::body::Body>> From<http::Response<T>> for Response { fn from(r: http::Response<T>) -> Response { let response = async_impl::Response::from(r); Response::new(response, None, KeepCoreThreadAlive::empty()) } }