2019-08-20 03:41:01 +00:00
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use crate::api::methods::sync::SyncResponse;
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use reqwest::Client as reqwest_client;
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use reqwest::{
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header::{HeaderMap, HeaderValue, CONTENT_TYPE, USER_AGENT},
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StatusCode,
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};
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use std::{collections::HashMap, error::Error, fmt, time};
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use url::{ParseError, Url};
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const V2_API_PATH: &str = "/_matrix/client/r0";
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#[derive(Debug)]
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pub enum MatrixParseError {
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ParseError(ParseError),
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EmptyScheme,
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}
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pub enum PresenceState {
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Offline,
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Online,
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Unavailable,
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}
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impl From<ParseError> for MatrixParseError {
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fn from(parse_error: ParseError) -> Self {
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MatrixParseError::ParseError(parse_error)
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}
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}
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#[derive(Debug)]
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pub struct ResponseError {
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code: StatusCode,
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content: String,
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}
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impl fmt::Display for ResponseError {
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fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
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write!(formatter, "{}: {}", self.code, self.content)
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}
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}
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impl Error for ResponseError {}
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pub enum MatrixHTTPMethod {
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Get,
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Put,
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Delete,
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Post,
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}
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#[derive(Debug)]
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pub struct Client {
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homeserver_url: String,
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access_token: Option<String>,
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mxid: Option<String>,
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default_492_wait_ms: u64,
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reqwest_client: reqwest_client,
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}
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impl Client {
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pub fn new(
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homeserver_url: &str,
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access_token: Option<String>,
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mxid: Option<String>,
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default_492_wait_ms: Option<u64>,
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) -> Result<Self, MatrixParseError> {
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let url = Url::parse(homeserver_url)?;
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if url.scheme().is_empty() {
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return Err(MatrixParseError::EmptyScheme);
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}
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Ok(Client {
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homeserver_url: homeserver_url.to_string(),
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access_token,
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mxid,
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default_492_wait_ms: default_492_wait_ms.unwrap_or_else(|| 5000),
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reqwest_client: reqwest_client::new(),
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})
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}
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/// Sends an API request to the homeserver using the specified method and
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/// path, returning either an error or the response text.
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///
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/// The header will automatically be populated with a user agent and have
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/// the content type set to `application/json`. If a token was provided, it
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2019-08-21 00:04:13 +00:00
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/// will be used for the Authorization header.
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2019-08-20 03:41:01 +00:00
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///
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/// This is a blocking, synchronous send. If the response from the
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/// homeserver indicates that too many requests were sent, it will attempt
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/// to wait the specified duration (or a provided default) before retrying.
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fn send(
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&self,
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method: MatrixHTTPMethod,
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path: Option<&str>,
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content: Option<String>,
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query_params: Option<HashMap<String, String>>,
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headers: Option<HeaderMap>,
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) -> Result<String, Box<dyn std::error::Error>> {
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let mut query_params = query_params.unwrap_or_default();
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let mut headers = headers.unwrap_or_default();
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let endpoint = &format!(
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"{}{}",
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self.homeserver_url,
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path.unwrap_or_else(|| V2_API_PATH),
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);
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let mut request = match method {
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MatrixHTTPMethod::Get => self.reqwest_client.get(endpoint),
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MatrixHTTPMethod::Put => self.reqwest_client.put(endpoint),
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MatrixHTTPMethod::Delete => self.reqwest_client.delete(endpoint),
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MatrixHTTPMethod::Post => self.reqwest_client.post(endpoint),
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};
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if !headers.contains_key(&USER_AGENT) {
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let user_agent = &format!("libmatrix-client/{}", env!("CARGO_PKG_VERSION"));
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headers.insert(USER_AGENT, HeaderValue::from_str(user_agent)?);
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}
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if !headers.contains_key(&CONTENT_TYPE) {
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headers.insert(CONTENT_TYPE, HeaderValue::from_str("application/json")?);
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}
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if let Some(token) = &self.access_token {
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2019-08-21 00:04:13 +00:00
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request = request.bearer_auth(token);
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2019-08-20 03:41:01 +00:00
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}
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if let Some(id) = &self.mxid {
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query_params.insert("user_id".to_string(), id.to_string());
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}
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request = request.headers(headers).query(&query_params);
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if let Some(content) = content {
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request = request.body(content);
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}
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loop {
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let mut res = request
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.try_clone()
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.expect("Unable to clone request")
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.send()?;
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if res.status().is_success() {
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return Ok(res.text()?);
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} else if res.status() == StatusCode::TOO_MANY_REQUESTS {
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let mut body: HashMap<String, String> = res.json()?;
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if let Some(value) = body.get("error") {
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body = serde_json::from_str(value)?;
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}
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if let Some(value) = body.get("retry_after_ms") {
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std::thread::sleep(time::Duration::from_millis(value.parse::<u64>()?));
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} else {
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std::thread::sleep(time::Duration::from_millis(self.default_492_wait_ms));
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}
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} else {
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return Err(Box::from(ResponseError {
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code: res.status(),
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content: res.text()?,
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}));
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}
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}
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}
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2019-08-21 00:04:13 +00:00
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/// Helper method for sending query-based requests.
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2019-08-20 03:41:01 +00:00
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fn send_query(
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&self,
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method: MatrixHTTPMethod,
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path: &str,
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query_params: HashMap<String, String>,
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) -> Result<String, Box<dyn Error>> {
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self.send(method, Some(path), None, Some(query_params), None)
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}
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pub fn sync(
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&self,
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bookmark_token: Option<&str>,
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timeout_ms: Option<u64>,
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filter: Option<&str>,
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get_full_state: Option<bool>,
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set_presence: Option<PresenceState>,
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) -> Result<SyncResponse, Box<dyn Error>> {
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let mut params: HashMap<String, String> = HashMap::with_capacity(5);
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params.insert(
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"timeout".to_string(),
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timeout_ms.unwrap_or_else(|| 30000).to_string(),
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);
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if let Some(token) = bookmark_token {
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params.insert("since".to_string(), token.to_string());
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}
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if let Some(filter) = filter {
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params.insert("filter".to_string(), filter.to_string());
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}
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if let Some(true) = get_full_state {
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params.insert("full_state".to_string(), "true".to_string());
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}
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params.insert(
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"full_state".to_string(),
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match set_presence {
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Some(PresenceState::Online) => "online",
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Some(PresenceState::Unavailable) => "unavailable",
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None | Some(PresenceState::Offline) => "offline",
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}
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.to_string(),
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);
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Ok(serde_json::from_str(&self.send_query(
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MatrixHTTPMethod::Get,
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"/sync",
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params,
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)?)?)
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}
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}
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#[derive(Default)]
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pub struct ApiError {}
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impl fmt::Display for ApiError {
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fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
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write!(formatter, "an error occurred!")
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}
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}
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