forked from egg-mode-rs/egg-mode
-
Notifications
You must be signed in to change notification settings - Fork 0
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
- Loading branch information
1 parent
8f94a42
commit 7bc8bbf
Showing
6 changed files
with
173 additions
and
9 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,154 @@ | ||
| // This Source Code Form is subject to the terms of the Mozilla Public | ||
| // License, v. 2.0. If a copy of the MPL was not distributed with this | ||
| // file, You can obtain one at http://mozilla.org/MPL/2.0/. | ||
|
|
||
| //! Access to the Streaming API. | ||
| use std::{self, io}; | ||
|
|
||
| use futures::{Future, Stream, Poll, Async}; | ||
| use hyper::Body; | ||
| use hyper::client::{Request, FutureResponse}; | ||
| use rustc_serialize::json; | ||
|
|
||
| use auth::{self, Token}; | ||
| use error; | ||
| use links; | ||
| use tweet::Tweet; | ||
|
|
||
| use common::*; | ||
|
|
||
| /// Represents the kinds of messages that can be sent over Twitter's Streaming API. | ||
| #[derive(Debug)] | ||
| pub enum StreamMessage { | ||
| /// A blank line, sent periodically to keep the connection alive. | ||
| Ping, | ||
| /// A new tweet. | ||
| /// | ||
| /// Note that the `entities` inside the `user` field will be empty for tweets received via the | ||
| /// Streaming API. | ||
| Tweet(Tweet), | ||
| /// An unhandled message payload. | ||
| /// | ||
| /// Twitter can add new streaming messages to the API, and egg-mode includes them here so that | ||
| /// they can be used before egg-mode has a chance to handle them. | ||
| Unknown(json::Json), | ||
| } | ||
|
|
||
| impl FromJson for StreamMessage { | ||
| fn from_json(input: &json::Json) -> Result<Self, error::Error> { | ||
| if let Some(_event) = input.find("event") { | ||
| } else { | ||
| if let Ok(tweet) = Tweet::from_json(input) { | ||
| return Ok(StreamMessage::Tweet(tweet)); | ||
| } | ||
| } | ||
| Ok(StreamMessage::Unknown(input.clone())) | ||
| } | ||
|
|
||
| fn from_str(input: &str) -> Result<Self, error::Error> { | ||
| if input.trim().is_empty() { | ||
| Ok(StreamMessage::Ping) | ||
| } else { | ||
| let json = try!(json::Json::from_str(input.trim())); | ||
|
|
||
| StreamMessage::from_json(&json) | ||
| } | ||
| } | ||
| } | ||
|
|
||
| /// A `Stream` that represents a connection to the Twitter Streaming API. | ||
| pub struct TwitterStream { | ||
| buf: Vec<u8>, | ||
| handle: Handle, | ||
| request: Option<Request>, | ||
| response: Option<FutureResponse>, | ||
| body: Option<Body>, | ||
| } | ||
|
|
||
| impl TwitterStream { | ||
| fn new(handle: &Handle, request: Request) -> TwitterStream { | ||
| TwitterStream { | ||
| buf: vec![], | ||
| handle: handle.clone(), | ||
| request: Some(request), | ||
| response: None, | ||
| body: None, | ||
| } | ||
| } | ||
| } | ||
|
|
||
| impl Stream for TwitterStream { | ||
| type Item = StreamMessage; | ||
| type Error = error::Error; | ||
|
|
||
| fn poll(&mut self) -> Poll<Option<Self::Item>, Self::Error> { | ||
| if let Some(req) = self.request.take() { | ||
| self.response = Some(try!(get_response(&self.handle, req))); | ||
| } | ||
|
|
||
| if let Some(mut resp) = self.response.take() { | ||
| match resp.poll() { | ||
| Err(e) => return Err(e.into()), | ||
| Ok(Async::NotReady) => { | ||
| self.response = Some(resp); | ||
| return Ok(Async::NotReady); | ||
| }, | ||
| Ok(Async::Ready(resp)) => { | ||
| let status = resp.status(); | ||
| if !status.is_success() { | ||
| //TODO: should i try to pull the response regardless? | ||
| return Err(error::Error::BadStatus(status)); | ||
| } | ||
|
|
||
| self.body = Some(resp.body()); | ||
| }, | ||
| } | ||
| } | ||
|
|
||
| if let Some(mut body) = self.body.take() { | ||
| loop { | ||
| match body.poll() { | ||
| Err(e) => { | ||
| self.body = Some(body); | ||
| return Err(e.into()); | ||
| }, | ||
| Ok(Async::NotReady) => { | ||
| self.body = Some(body); | ||
| return Ok(Async::NotReady); | ||
| }, | ||
| Ok(Async::Ready(None)) => { | ||
| //TODO: introduce a new error for this? | ||
| return Err(error::Error::FutureAlreadyCompleted); | ||
| }, | ||
| Ok(Async::Ready(Some(chunk))) => { | ||
| self.buf.extend(&*chunk); | ||
|
|
||
| if let Some(pos) = self.buf.windows(2).position(|w| w == b"\r\n") { | ||
| self.body = Some(body); | ||
| let pos = pos + 2; | ||
| let resp = if let Ok(msg_str) = std::str::from_utf8(&self.buf[..pos]) { | ||
| StreamMessage::from_str(msg_str) | ||
| } else { | ||
| Err(io::Error::new(io::ErrorKind::InvalidData, | ||
| "stream did not contain valid UTF-8").into()) | ||
| }; | ||
|
|
||
| self.buf.drain(..pos); | ||
| return Ok(Async::Ready(Some(try!(resp)))); | ||
| } | ||
| }, | ||
| } | ||
| } | ||
| } else { | ||
| Err(error::Error::FutureAlreadyCompleted) | ||
| } | ||
| } | ||
| } | ||
|
|
||
| /// Opens a `TwitterStream` to the authenticated user's home stream. | ||
| pub fn user(handle: &Handle, token: &Token) -> TwitterStream { | ||
| let req = auth::get(links::stream::USER, token, None); | ||
|
|
||
| TwitterStream::new(handle, req) | ||
| } |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters