From 0a4c0413ef0154cde2e3485ec0415e6069596a23 Mon Sep 17 00:00:00 2001 From: sigoden Date: Wed, 24 Apr 2024 07:16:56 +0800 Subject: feat: serve all LLMs as OpenAI-compatible API (#431) --- src/cli.rs | 3 + src/client/reply_handler.rs | 4 +- src/config/mod.rs | 44 ++---- src/logger.rs | 40 +++++ src/main.rs | 61 +++++--- src/repl/mod.rs | 2 - src/serve.rs | 364 ++++++++++++++++++++++++++++++++++++++++++++ 7 files changed, 461 insertions(+), 57 deletions(-) create mode 100644 src/logger.rs create mode 100644 src/serve.rs (limited to 'src') diff --git a/src/cli.rs b/src/cli.rs index 7cfd09a..aff608a 100644 --- a/src/cli.rs +++ b/src/cli.rs @@ -15,6 +15,9 @@ pub struct Cli { /// Forces the session to be saved #[clap(long)] pub save_session: bool, + /// Serve all LLMs as OpenAI-compatible API + #[clap(long, value_name = "ADDRESS")] + pub serve: Option>, /// Execute commands in natural language #[clap(short = 'e', long)] pub execute: bool, diff --git a/src/client/reply_handler.rs b/src/client/reply_handler.rs index e11ea1d..e024685 100644 --- a/src/client/reply_handler.rs +++ b/src/client/reply_handler.rs @@ -19,7 +19,7 @@ impl ReplyHandler { } pub fn text(&mut self, text: &str) -> Result<()> { - debug!("ReplyText: {}", text); + // debug!("ReplyText: {}", text); if text.is_empty() { return Ok(()); } @@ -33,7 +33,7 @@ impl ReplyHandler { } pub fn done(&mut self) -> Result<()> { - debug!("ReplyDone"); + // debug!("ReplyDone"); let ret = self .sender .send(ReplyEvent::Done) diff --git a/src/config/mod.rs b/src/config/mod.rs index f86cda1..e1cec4d 100644 --- a/src/config/mod.rs +++ b/src/config/mod.rs @@ -79,9 +79,9 @@ pub struct Config { #[serde(skip)] pub model: Model, #[serde(skip)] - pub last_message: Option<(Input, String)>, + pub working_mode: WorkingMode, #[serde(skip)] - pub in_repl: bool, + pub last_message: Option<(Input, String)>, } impl Default for Config { @@ -110,8 +110,8 @@ impl Default for Config { role: None, session: None, model: Default::default(), + working_mode: WorkingMode::Command, last_message: None, - in_repl: false, } } } @@ -119,13 +119,13 @@ impl Default for Config { pub type GlobalConfig = Arc>; impl Config { - pub fn init(is_interactive: bool) -> Result { + pub fn init(working_mode: WorkingMode) -> Result { let config_path = Self::config_file()?; let api_key = env::var("OPENAI_API_KEY").ok(); let exist_config_path = config_path.exists(); - if is_interactive && api_key.is_none() && !exist_config_path { + if working_mode != WorkingMode::Command && api_key.is_none() && !exist_config_path { create_config_file(&config_path)?; } let mut config = if api_key.is_some() && !exist_config_path { @@ -143,14 +143,13 @@ impl Config { config.set_wrap(&wrap)?; } + config.working_mode = working_mode; config.load_roles()?; config.setup_model()?; config.setup_highlight(); config.setup_light_theme()?; - setup_logger()?; - Ok(config) } @@ -611,7 +610,7 @@ impl Config { let save_session = session.save_session(); if session.dirty && save_session != Some(false) { if save_session.is_none() || session.is_temp() { - if !self.in_repl { + if self.working_mode != WorkingMode::Repl { return Ok(()); } let ans = Confirm::new("Save session?").with_default(false).prompt()?; @@ -998,6 +997,13 @@ impl Keybindings { } } +#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)] +pub enum WorkingMode { + Command, + Repl, + Serve, +} + #[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)] pub enum State { Normal, @@ -1145,25 +1151,3 @@ fn complete_option_bool(value: Option) -> Vec { None => vec!["true".to_string(), "false".to_string()], } } - -#[cfg(debug_assertions)] -fn setup_logger() -> Result<()> { - use simplelog::{LevelFilter, WriteLogger}; - let file = std::fs::File::create(Config::local_path("debug.log")?)?; - let log_filter = match std::env::var("AICHAT_LOG_FILTER") { - Ok(v) => v, - Err(_) => "aichat".into(), - }; - let config = simplelog::ConfigBuilder::new() - .add_filter_allow(log_filter) - .set_thread_level(LevelFilter::Off) - .set_time_level(LevelFilter::Off) - .build(); - WriteLogger::init(log::LevelFilter::Debug, config, file)?; - Ok(()) -} - -#[cfg(not(debug_assertions))] -fn setup_logger() -> Result<()> { - Ok(()) -} diff --git a/src/logger.rs b/src/logger.rs new file mode 100644 index 0000000..f7ef2f5 --- /dev/null +++ b/src/logger.rs @@ -0,0 +1,40 @@ +use crate::config::WorkingMode; + +use anyhow::Result; +use log::LevelFilter; +use simplelog::{format_description, Config as LogConfig, ConfigBuilder}; + +#[cfg(debug_assertions)] +pub fn setup_logger(working_mode: WorkingMode) -> Result<()> { + let config = build_config(); + if working_mode == WorkingMode::Serve { + simplelog::SimpleLogger::init(LevelFilter::Debug, config)?; + } else { + let file = std::fs::File::create(crate::config::Config::local_path("debug.log")?)?; + simplelog::WriteLogger::init(LevelFilter::Debug, config, file)?; + } + Ok(()) +} + +#[cfg(not(debug_assertions))] +pub fn setup_logger(working_mode: WorkingMode) -> Result<()> { + let config = build_config(); + if working_mode == WorkingMode::Serve { + simplelog::SimpleLogger::init(log::LevelFilter::Info, config)?; + } + Ok(()) +} + +fn build_config() -> LogConfig { + let log_filter = match std::env::var("AICHAT_LOG_FILTER") { + Ok(v) => v, + Err(_) => "aichat".into(), + }; + ConfigBuilder::new() + .add_filter_allow(log_filter) + .set_time_format_custom(format_description!( + "[year]-[month]-[day]T[hour]:[minute]:[second].[subsecond digits:3]Z" + )) + .set_thread_level(LevelFilter::Off) + .build() +} diff --git a/src/main.rs b/src/main.rs index bc6b8f1..b396917 100644 --- a/src/main.rs +++ b/src/main.rs @@ -1,17 +1,21 @@ mod cli; mod client; mod config; +mod logger; mod render; mod repl; +mod serve; +#[macro_use] +mod utils; #[macro_use] extern crate log; -#[macro_use] -mod utils; use crate::cli::Cli; use crate::client::{ensure_model_capabilities, init_client, list_models, send_stream}; -use crate::config::{Config, GlobalConfig, Input, CODE_ROLE, EXPLAIN_ROLE, SHELL_ROLE}; +use crate::config::{ + Config, GlobalConfig, Input, WorkingMode, CODE_ROLE, EXPLAIN_ROLE, SHELL_ROLE, +}; use crate::render::{render_error, MarkdownRender}; use crate::repl::Repl; use crate::utils::{ @@ -33,7 +37,21 @@ use tokio::sync::oneshot; async fn main() -> Result<()> { let cli = Cli::parse(); let text = cli.text(); - let config = Arc::new(RwLock::new(Config::init(text.is_none())?)); + let file = &cli.file; + let no_input = text.is_none() && file.is_empty(); + let working_mode = if cli.serve.is_some() { + WorkingMode::Serve + } else if no_input { + WorkingMode::Repl + } else { + WorkingMode::Command + }; + crate::logger::setup_logger(working_mode)?; + let config = Arc::new(RwLock::new(Config::init(working_mode)?)); + + if let Some(addr) = cli.serve { + return serve::run(config, addr).await; + } if cli.list_roles { config .read() @@ -89,20 +107,21 @@ async fn main() -> Result<()> { return Ok(()); } let text = aggregate_text(text)?; - let input = create_input(&config, text, &cli.file)?; if cli.execute { - match input { - Some(input) => { - execute(&config, input).await?; - return Ok(()); - } - None => bail!("No input text"), + if no_input { + bail!("No input"); } + let input = create_input(&config, text, file)?; + execute(&config, input).await?; + return Ok(()); } config.write().apply_prelude()?; - if let Err(err) = match input { - Some(input) => start_directive(&config, input, cli.no_stream, cli.code).await, - None => start_interactive(&config).await, + if let Err(err) = match no_input { + false => { + let input = create_input(&config, text, file)?; + start_directive(&config, input, cli.no_stream, cli.code).await + } + true => start_interactive(&config).await, } { let highlight = stderr().is_terminal() && config.read().highlight; render_error(err, highlight) @@ -232,19 +251,15 @@ fn aggregate_text(text: Option) -> Result> { Ok(text) } -fn create_input( - config: &GlobalConfig, - text: Option, - file: &[String], -) -> Result> { - if text.is_none() && file.is_empty() { - return Ok(None); - } +fn create_input(config: &GlobalConfig, text: Option, file: &[String]) -> Result { let input_context = config.read().input_context(); let input = if file.is_empty() { Input::from_str(&text.unwrap_or_default(), input_context) } else { Input::new(&text.unwrap_or_default(), file.to_vec(), input_context)? }; - Ok(Some(input)) + if input.is_empty() { + bail!("No input"); + } + Ok(input) } diff --git a/src/repl/mod.rs b/src/repl/mod.rs index 3c0b98b..dd1c735 100644 --- a/src/repl/mod.rs +++ b/src/repl/mod.rs @@ -77,8 +77,6 @@ pub struct Repl { impl Repl { pub fn init(config: &GlobalConfig) -> Result { - config.write().in_repl = true; - let editor = Self::create_editor(config)?; let prompt = ReplPrompt::new(config); diff --git a/src/serve.rs b/src/serve.rs new file mode 100644 index 0000000..2286b61 --- /dev/null +++ b/src/serve.rs @@ -0,0 +1,364 @@ +use crate::{ + client::{init_client, ClientConfig, Message, Model, ReplyEvent, ReplyHandler, SendData}, + config::{Config, GlobalConfig}, + utils::create_abort_signal, +}; + +use anyhow::{anyhow, bail, Result}; +use bytes::Bytes; +use chrono::{Timelike, Utc}; +use futures_util::StreamExt; +use http::{Method, Response, StatusCode}; +use http_body_util::{combinators::BoxBody, BodyExt, Full, StreamBody}; +use hyper::{ + body::{Frame, Incoming}, + service::service_fn, +}; +use hyper_util::rt::{TokioExecutor, TokioIo}; +use parking_lot::RwLock; +use serde::Deserialize; +use serde_json::{json, Value}; +use std::{convert::Infallible, sync::Arc}; +use tokio::{ + net::TcpListener, + sync::{ + mpsc::{unbounded_channel, UnboundedReceiver, UnboundedSender}, + oneshot, + }, +}; +use tokio_graceful::Shutdown; +use tokio_stream::wrappers::UnboundedReceiverStream; + +const DEFAULT_ADDRESS: &str = "0.0.0.0:8080"; + +type AppResponse = Response>; + +pub async fn run(config: GlobalConfig, addr: Option) -> Result<()> { + let addr = match addr { + Some(addr) => { + if let Ok(port) = addr.parse::() { + format!("0.0.0.0:{port}") + } else { + addr + } + } + None => DEFAULT_ADDRESS.to_string(), + }; + let clients = config.read().clients.clone(); + let model = config.read().model.clone(); + let listener = TcpListener::bind(&addr).await?; + let server = Arc::new(Server { clients, model }); + let stop_server = server.run(listener).await?; + println!("Access the chat completion API at: http://{addr}/v1/chat/completions"); + shutdown_signal().await; + let _ = stop_server.send(()); + Ok(()) +} + +struct Server { + clients: Vec, + model: Model, +} + +impl Server { + async fn run(self: Arc, listener: TcpListener) -> Result> { + let (tx, rx) = oneshot::channel(); + tokio::spawn(async move { + let shutdown = Shutdown::new(async { rx.await.unwrap_or_default() }); + let guard = shutdown.guard_weak(); + + loop { + tokio::select! { + res = listener.accept() => { + let Ok((cnx, _)) = res else { + continue; + }; + + let stream = TokioIo::new(cnx); + let server = self.clone(); + shutdown.spawn_task(async move { + let hyper_service = service_fn(move |request: hyper::Request| { + server.clone().handle(request) + }); + let _ = hyper_util::server::conn::auto::Builder::new(TokioExecutor::new()) + .serve_connection_with_upgrades(stream, hyper_service) + .await; + }); + } + _ = guard.cancelled() => { + break; + } + } + } + }); + Ok(tx) + } + + async fn handle( + self: Arc, + req: hyper::Request, + ) -> std::result::Result { + let method = req.method().clone(); + let uri = req.uri().clone(); + let mut status = StatusCode::OK; + let res = if method == Method::POST && uri == "/v1/chat/completions" { + self.chat_completion(req).await + } else if method == Method::OPTIONS && uri == "/v1/chat/completions" { + status = StatusCode::NO_CONTENT; + Ok(Response::default()) + } else { + status = StatusCode::NOT_FOUND; + Err(anyhow!("The requested endpoint was not found.")) + }; + let mut res = match res { + Ok(res) => { + info!("{method} {uri} {}", status.as_u16()); + res + } + Err(err) => { + error!("{method} {uri} {} {err}", status.as_u16()); + ret_err(err) + } + }; + *res.status_mut() = status; + set_cors_header(&mut res); + Ok(res) + } + + async fn chat_completion(&self, req: hyper::Request) -> Result { + let req_body = req.collect().await?.to_bytes(); + let req_body: ChatCompletionReqBody = serde_json::from_slice(&req_body) + .map_err(|err| anyhow!("Invalid request body, {err}"))?; + + let ChatCompletionReqBody { + model, + messages, + temperature, + max_tokens, + stream, + } = req_body; + + let config = Config { + clients: self.clients.to_vec(), + model: self.model.clone(), + ..Default::default() + }; + let config = Arc::new(RwLock::new(config)); + if model != "default" && model != self.model.id() { + config.write().set_model(&model)?; + } + + let mut client = init_client(&config)?; + if max_tokens.is_some() { + client.set_model(client.model().clone().set_max_output_tokens(max_tokens)); + } + let abort = create_abort_signal(); + let http_client = client.build_client()?; + + let completion_id = generate_completion_id(); + let created = Utc::now().timestamp(); + + let send_data: SendData = SendData { + messages, + temperature, + stream, + }; + + if stream { + let (tx, mut rx) = unbounded_channel(); + tokio::spawn(async move { + let mut is_first = true; + let (tx2, rx2) = unbounded_channel(); + let mut handler = ReplyHandler::new(tx2, abort); + async fn map_event( + mut rx: UnboundedReceiver, + tx: &UnboundedSender, + is_first: &mut bool, + ) { + while let Some(reply_event) = rx.recv().await { + if *is_first { + let _ = tx.send(ResEvent::First(None)); + *is_first = false; + } + match reply_event { + ReplyEvent::Text(text) => { + let _ = tx.send(ResEvent::Text(text)); + } + ReplyEvent::Done => { + let _ = tx.send(ResEvent::Done); + } + } + } + } + tokio::select! { + _ = map_event(rx2, &tx, &mut is_first) => {} + ret = client.send_message_streaming_inner(&http_client, &mut handler, send_data) => { + if let Err(err) = ret { + send_first_event(&tx, Some(format!("{err:?}")), &mut is_first) + } + } + } + }); + + let first_event = rx.recv().await; + + if let Some(ResEvent::First(Some(err))) = first_event { + bail!("{err}"); + } + + let shared: Arc<(String, i64)> = Arc::new((completion_id, created)); + let stream = UnboundedReceiverStream::new(rx); + let stream = stream.filter_map(move |res_event| { + let shared = shared.clone(); + async move { + match res_event { + ResEvent::Text(text) => { + Some(Ok(create_frame(&shared.0, shared.1, &text, false))) + } + ResEvent::Done => Some(Ok(create_frame(&shared.0, shared.1, "", true))), + _ => None, + } + } + }); + let res = Response::builder() + .status(StatusCode::OK) + .header("Content-Type", "text/event-stream") + .header("Cache-Control", "no-cache") + .header("Connection", "keep-alive") + .body(BodyExt::boxed(StreamBody::new(stream)))?; + Ok(res) + } else { + let content = client.send_message_inner(&http_client, send_data).await?; + let res = Response::builder() + .header("Content-Type", "application/json") + .body(Full::new(ret_non_stream(&completion_id, created, &content)).boxed())?; + Ok(res) + } + } +} + +#[derive(Debug, Deserialize)] +struct ChatCompletionReqBody { + model: String, + messages: Vec, + temperature: Option, + max_tokens: Option, + #[serde(default)] + stream: bool, +} + +#[derive(Debug)] +enum ResEvent { + First(Option), + Text(String), + Done, +} + +fn send_first_event(tx: &UnboundedSender, data: Option, is_first: &mut bool) { + if *is_first { + let _ = tx.send(ResEvent::First(data)); + *is_first = false; + } +} + +async fn shutdown_signal() { + tokio::signal::ctrl_c() + .await + .expect("Failed to install CTRL+C signal handler") +} + +fn generate_completion_id() -> String { + let random_id = chrono::Utc::now().nanosecond(); + format!("chatcmpl-{}", random_id) +} + +fn set_cors_header(res: &mut AppResponse) { + res.headers_mut().insert( + hyper::header::ACCESS_CONTROL_ALLOW_ORIGIN, + hyper::header::HeaderValue::from_static("*"), + ); + res.headers_mut().insert( + hyper::header::ACCESS_CONTROL_ALLOW_METHODS, + hyper::header::HeaderValue::from_static("GET,POST,PUT,PATCH,DELETE"), + ); + res.headers_mut().insert( + hyper::header::ACCESS_CONTROL_ALLOW_HEADERS, + hyper::header::HeaderValue::from_static("Content-Type,Authorization"), + ); +} + +fn create_frame(id: &str, created: i64, content: &str, done: bool) -> Frame { + let (delta, finish_reason) = if done { + (json!({}), "stop".into()) + } else { + let delta = if content.is_empty() { + json!({ "role": "assistant", "content": content }) + } else { + json!({ "content": content }) + }; + (delta, Value::Null) + }; + let mut value = json!({ + "id": id, + "object": "chat.completion.chunk", + "created": created, + "model": "gpt-3.5-turbo", + "choices": [ + { + "index": 0, + "delta": delta, + "finish_reason": finish_reason, + }, + ], + }); + let output = if done { + value["usage"] = json!({ + "prompt_tokens": 0, + "completion_tokens": 0, + "total_tokens": 0, + }); + format!("data: {value}\n\ndata: [DONE]\n\n") + } else { + format!("data: {value}\n\n") + }; + Frame::data(Bytes::from(output)) +} + +fn ret_non_stream(id: &str, created: i64, content: &str) -> Bytes { + let res_body = json!({ + "id": id, + "object": "chat.completion", + "created": created, + "model": "gpt-3.5-turbo", + "choices": [ + { + "index": 0, + "message": { + "role": "assistant", + "content": content, + }, + "finish_reason": "stop", + }, + ], + "usage": { + "prompt_tokens": 0, + "completion_tokens": 0, + "total_tokens": 0, + }, + }); + Bytes::from(res_body.to_string()) +} + +fn ret_err(err: T) -> AppResponse { + let data = json!({ + "error": { + "message": err.to_string(), + "type": "invalid_request_error", + }, + }); + Response::builder() + .status(StatusCode::OK) + .header("Content-Type", "application/json") + .body(Full::new(Bytes::from(data.to_string())).boxed()) + .unwrap() +} -- cgit v1.2.3