refactor: migrate monolithic crate to Cargo Workspace with Clean Architecture
Transform the single binary crate into a 9-crate workspace monorepo: - Root Cargo.toml as [workspace] manager with resolver = "2" - zesdex-entities: Domain entity types (session, settings, store, message, etc.) - zesdex-utils: Pure utility functions (error, logger, pagination, slug, clipboard) - zesdex-dto: Data Transfer Objects for LLM provider API communication - zesdex-ipc: Unix-socket IPC layer (client/server/framing/protocol) - zesdex-iam: Identity & Access Management (Clean Architecture: domain/application/infrastructure) - zesdex-cms: Content Management (Clean Architecture: domain/application/infrastructure) - zesdex-middleware: HTTP middleware (Auth, CORS, Rate Limiting) - zesdex-libs: Composition root (AppContext, DB init, JWT, Argon2) - zesdex-backend: Main binary entry point + seed/migrate binaries - DevOps: Dockerfile, docker-compose, Nix (flake/shell/default), CI/CD updates - Remove dead root src/ and src-misc/ directories All crate re-exports maintain backward compatibility with original crate::model::*, crate::dto::*, crate::ipc::* module paths. Feature crates enforce strict layer separation: domain -> application -> infrastructure with generic trait-based dependency injection.
This commit is contained in:
asepharyana
@@ -0,0 +1,350 @@
|
||||
//! Blocking HTTP client for OpenAI/Anthropic-compatible chat completion APIs,
|
||||
//! supporting both non-streaming and SSE-streaming requests with automatic retry.
|
||||
use anyhow::Result;
|
||||
use std::time::Duration;
|
||||
|
||||
use crate::app::runtime::stream::turn::StreamedTurn;
|
||||
use crate::app::runtime::stream::{SseParser, StreamEvent};
|
||||
use crate::dto::chat::message::ChatMessage;
|
||||
use crate::dto::provider::request::{ChatRequest, StreamOptions, ToolDef};
|
||||
|
||||
pub(crate) const DEFAULT_BASE_URL: &str = "https://opencode.ai/zen/v1";
|
||||
const DEFAULT_MODEL: &str = "deepseek-v4-flash-free";
|
||||
pub const DEFAULT_API_KEY: &str = "";
|
||||
const CONNECT_TIMEOUT: Duration = Duration::from_secs(10);
|
||||
const REQUEST_TIMEOUT: Duration = Duration::from_mins(1);
|
||||
|
||||
/// Blocking HTTP client for a single LLM provider endpoint.
|
||||
///
|
||||
/// Holds the reqwest client, credentials, and model/base URL selection used
|
||||
/// by both the non-streaming and streaming chat completion calls.
|
||||
pub struct LlmClient {
|
||||
pub client: reqwest::blocking::Client,
|
||||
pub api_key: String,
|
||||
pub base_url: String,
|
||||
pub model: String,
|
||||
}
|
||||
|
||||
impl LlmClient {
|
||||
/// Construct a client, falling back to built-in defaults for empty inputs.
|
||||
///
|
||||
/// Flow: empty `api_key/model` → substitute defaults → build reqwest client
|
||||
/// with connect/request timeouts → if TLS config fails, retry with just
|
||||
/// request timeout (no connect timeout) → normalize `base_url`.
|
||||
///
|
||||
/// Why: empty strings are treated as "unset" rather than errors so callers
|
||||
/// can pass through unconfigured settings without special-casing them.
|
||||
/// Timeouts are always enforced — the pure-default-client fallback is only
|
||||
/// used as a last resort when even the no-connect-timeout build fails.
|
||||
pub fn new(mut api_key: String, model: String, base_url: Option<String>) -> Self {
|
||||
if api_key.is_empty() {
|
||||
api_key = DEFAULT_API_KEY.to_string();
|
||||
}
|
||||
let model = if model.is_empty() {
|
||||
DEFAULT_MODEL.to_string()
|
||||
} else {
|
||||
model
|
||||
};
|
||||
let client = match reqwest::blocking::Client::builder()
|
||||
.timeout(REQUEST_TIMEOUT)
|
||||
.connect_timeout(CONNECT_TIMEOUT)
|
||||
.build()
|
||||
{
|
||||
Ok(c) => c,
|
||||
Err(e) => {
|
||||
tracing::warn!(
|
||||
"failed to build reqwest client with connect timeout: {}. \
|
||||
retrying without connect timeout",
|
||||
e,
|
||||
);
|
||||
match reqwest::blocking::Client::builder()
|
||||
.timeout(REQUEST_TIMEOUT)
|
||||
.build()
|
||||
{
|
||||
Ok(c) => c,
|
||||
Err(e2) => {
|
||||
tracing::warn!(
|
||||
"also failed: {}. using default client (no configured timeouts)",
|
||||
e2,
|
||||
);
|
||||
reqwest::blocking::Client::new()
|
||||
}
|
||||
}
|
||||
}
|
||||
};
|
||||
LlmClient {
|
||||
client,
|
||||
api_key,
|
||||
base_url: base_url
|
||||
.filter(|s| !s.is_empty())
|
||||
.unwrap_or_else(|| DEFAULT_BASE_URL.to_string()),
|
||||
model,
|
||||
}
|
||||
}
|
||||
|
||||
/// Send a non-streaming chat completion request and return the assistant's reply.
|
||||
///
|
||||
/// Flow: build request → POST with retry loop (up to 10 attempts, 2s backoff)
|
||||
/// → parse JSON response → extract first choice's message and token usage.
|
||||
///
|
||||
/// Why: retries transient failures but aborts immediately on 401/403, since
|
||||
/// those indicate a bad API key that retrying won't fix.
|
||||
///
|
||||
/// Return: `Err` if all retries are exhausted, an auth error occurs, or the
|
||||
/// response has no choices.
|
||||
pub fn chat_with_tools_non_streaming(
|
||||
&self,
|
||||
messages: &[ChatMessage],
|
||||
tools: Option<Vec<ToolDef>>,
|
||||
) -> Result<(ChatMessage, Option<(u64, u64)>)> {
|
||||
let req = ChatRequest {
|
||||
model: self.model.clone(),
|
||||
messages: messages.to_vec(),
|
||||
max_tokens: Some(4096),
|
||||
temperature: Some(0.7),
|
||||
tools,
|
||||
stream: Some(false),
|
||||
stop: None,
|
||||
stream_options: None,
|
||||
tool_choice: None,
|
||||
};
|
||||
|
||||
let url = format!("{}/chat/completions", self.base_url);
|
||||
let max_retries = 10;
|
||||
let mut attempt = 0;
|
||||
|
||||
loop {
|
||||
attempt += 1;
|
||||
|
||||
let mut http_req = self
|
||||
.client
|
||||
.post(&url)
|
||||
.header("Content-Type", "application/json");
|
||||
|
||||
if !self.api_key.is_empty() {
|
||||
http_req = http_req.header("Authorization", format!("Bearer {}", self.api_key));
|
||||
}
|
||||
|
||||
let result = (|| -> Result<(ChatMessage, Option<(u64, u64)>)> {
|
||||
let resp = http_req.json(&req).send().map_err(|e| {
|
||||
if e.is_timeout() {
|
||||
anyhow::anyhow!("API request timed out after {REQUEST_TIMEOUT:?}. Check your network or try again.")
|
||||
} else if e.is_connect() {
|
||||
anyhow::anyhow!("Could not connect to {}. Is the URL correct and is the service reachable?", self.base_url)
|
||||
} else {
|
||||
anyhow::anyhow!("API request failed: {e}")
|
||||
}
|
||||
})?;
|
||||
|
||||
if !resp.status().is_success() {
|
||||
let status = resp.status();
|
||||
let body = resp.text().unwrap_or_default();
|
||||
anyhow::bail!("API error {} from {}: {}", status, self.base_url, body);
|
||||
}
|
||||
|
||||
let data: crate::dto::provider::response::ChatResponse = resp.json()?;
|
||||
let usage = data.usage.map(|u| {
|
||||
(
|
||||
u64::from(u.prompt_tokens),
|
||||
u64::from(u.completion_tokens),
|
||||
)
|
||||
});
|
||||
let message = data
|
||||
.choices
|
||||
.into_iter()
|
||||
.next()
|
||||
.and_then(|c| c.message)
|
||||
.ok_or_else(|| anyhow::anyhow!("API response had no choices"))?;
|
||||
Ok((message, usage))
|
||||
})();
|
||||
|
||||
match result {
|
||||
Ok((msg, usage)) => return Ok((msg, usage)),
|
||||
Err(e) => {
|
||||
let err_str = e.to_string();
|
||||
let err_lower = err_str.to_lowercase();
|
||||
let is_auth_error = err_str.contains("401")
|
||||
|| err_str.contains("403")
|
||||
|| err_lower.contains("unauthorized")
|
||||
|| err_lower.contains("forbidden")
|
||||
|| err_lower.contains("authentication failed");
|
||||
if attempt >= max_retries || is_auth_error {
|
||||
return Err(e);
|
||||
}
|
||||
tracing::warn!("Warning: {}. Retrying {}/{}...", e, attempt, max_retries);
|
||||
std::thread::sleep(Duration::from_secs(2));
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/// Streaming variant of `chat_with_tools`. Feeds SSE chunks into an `SseParser` /
|
||||
/// `StreamedTurn` and invokes `on_event` for every parsed `StreamEvent` as it arrives,
|
||||
/// so the caller can push incremental UI updates in real time. Returns the fully
|
||||
/// assembled assistant message plus token usage (prompt, completion) if the server
|
||||
/// reported it. Retries the whole request only if no event has been observed yet
|
||||
/// (once tokens start arriving, a partial turn cannot be safely replayed).
|
||||
pub fn chat_with_tools_streaming(
|
||||
&self,
|
||||
messages: &[ChatMessage],
|
||||
tools: Option<Vec<ToolDef>>,
|
||||
temperature: Option<f32>,
|
||||
max_tokens: Option<u32>,
|
||||
mut on_event: impl FnMut(&StreamEvent) -> bool,
|
||||
) -> Result<(ChatMessage, Option<(u64, u64)>)> {
|
||||
let req = ChatRequest {
|
||||
model: self.model.clone(),
|
||||
messages: messages.to_vec(),
|
||||
max_tokens: Some(max_tokens.unwrap_or(4096)),
|
||||
temperature: Some(temperature.unwrap_or(0.7)),
|
||||
tools,
|
||||
stream: Some(true),
|
||||
stop: None,
|
||||
stream_options: Some(StreamOptions {
|
||||
include_usage: true,
|
||||
}),
|
||||
tool_choice: None,
|
||||
};
|
||||
|
||||
let url = format!("{}/chat/completions", self.base_url);
|
||||
// Fewer retries on streaming because `run_agent_turn` has a
|
||||
// non-streaming fallback that also retries. Combined total is
|
||||
// capped implicitly by the per-turn timeout and step limits.
|
||||
let max_retries = 3;
|
||||
let mut attempt = 0;
|
||||
let mut started = false;
|
||||
|
||||
loop {
|
||||
attempt += 1;
|
||||
let mut wrapped = |event: &StreamEvent| -> bool {
|
||||
started = true;
|
||||
on_event(event)
|
||||
};
|
||||
match self.try_stream_once(&req, &url, &mut wrapped) {
|
||||
Ok(result) => return Ok(result),
|
||||
Err(e) => {
|
||||
let err_str = e.to_string();
|
||||
let err_lower = err_str.to_lowercase();
|
||||
let is_auth_error = err_str.contains("401")
|
||||
|| err_str.contains("403")
|
||||
|| err_lower.contains("unauthorized")
|
||||
|| err_lower.contains("forbidden")
|
||||
|| err_lower.contains("authentication failed");
|
||||
if started || attempt >= max_retries || is_auth_error {
|
||||
return Err(e);
|
||||
}
|
||||
tracing::warn!("Warning: {}. Retrying {}/{}...", e, attempt, max_retries);
|
||||
std::thread::sleep(Duration::from_secs(2));
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/// Perform one streaming chat completion request, parsing SSE events until completion.
|
||||
///
|
||||
/// Flow: POST → read body in chunks → advance past valid UTF-8 boundary →
|
||||
/// feed into `SseParser` → dispatch each `StreamEvent` to `on_event` and
|
||||
/// accumulate in `StreamedTurn` → return assembled assistant message on `Done`.
|
||||
///
|
||||
/// Why: chunk-by-chunk UTF-8-aware reads avoid splitting multi-byte sequences;
|
||||
/// returns `aborted` error if `on_event` returns false so the caller can cancel.
|
||||
///
|
||||
/// Return: assembled message + optional usage on success, `Err` on read
|
||||
/// failure, non-2xx status, or callback-initiated abort.
|
||||
fn try_stream_once(
|
||||
&self,
|
||||
req: &ChatRequest,
|
||||
url: &str,
|
||||
on_event: &mut dyn FnMut(&StreamEvent) -> bool,
|
||||
) -> Result<(ChatMessage, Option<(u64, u64)>)> {
|
||||
use std::io::Read;
|
||||
|
||||
let mut http_req = self
|
||||
.client
|
||||
.post(url)
|
||||
.header("Content-Type", "application/json");
|
||||
if !self.api_key.is_empty() {
|
||||
http_req = http_req.header("Authorization", format!("Bearer {}", self.api_key));
|
||||
}
|
||||
|
||||
let resp = http_req.json(req).send().map_err(|e| {
|
||||
if e.is_timeout() {
|
||||
anyhow::anyhow!("API request timed out after {REQUEST_TIMEOUT:?}. Check your network or try again.")
|
||||
} else if e.is_connect() {
|
||||
anyhow::anyhow!("Could not connect to {}. Is the URL correct and is the service reachable?", self.base_url)
|
||||
} else {
|
||||
anyhow::anyhow!("API request failed: {e}")
|
||||
}
|
||||
})?;
|
||||
|
||||
if !resp.status().is_success() {
|
||||
let status = resp.status();
|
||||
let body = resp.text().unwrap_or_default();
|
||||
anyhow::bail!("API error {} from {}: {}", status, self.base_url, body);
|
||||
}
|
||||
|
||||
let mut turn = StreamedTurn::new();
|
||||
let mut usage: Option<(u64, u64)> = None;
|
||||
let mut parser = SseParser::new();
|
||||
let mut reader = resp;
|
||||
let mut byte_buf: Vec<u8> = Vec::new();
|
||||
let mut chunk_buf = [0u8; 4096];
|
||||
|
||||
loop {
|
||||
let n = reader
|
||||
.read(&mut chunk_buf)
|
||||
.map_err(|e| anyhow::anyhow!("stream read error: {e}"))?;
|
||||
if n == 0 {
|
||||
break;
|
||||
}
|
||||
byte_buf.extend_from_slice(&chunk_buf[..n]);
|
||||
let valid_len = match std::str::from_utf8(&byte_buf) {
|
||||
Ok(s) => s.len(),
|
||||
Err(e) => e.valid_up_to(),
|
||||
};
|
||||
if valid_len == 0 {
|
||||
continue;
|
||||
}
|
||||
let text = String::from_utf8_lossy(&byte_buf[..valid_len]).into_owned();
|
||||
byte_buf.drain(..valid_len);
|
||||
|
||||
for event in parser.feed(&text) {
|
||||
if !on_event(&event) {
|
||||
anyhow::bail!("aborted");
|
||||
}
|
||||
match &event {
|
||||
StreamEvent::Usage {
|
||||
prompt_tokens,
|
||||
completion_tokens,
|
||||
..
|
||||
} => {
|
||||
usage = Some((*prompt_tokens, *completion_tokens));
|
||||
}
|
||||
StreamEvent::Error(msg) => {
|
||||
anyhow::bail!("stream error: {msg}");
|
||||
}
|
||||
StreamEvent::Done => {
|
||||
turn.apply_event(&event);
|
||||
turn.done_received = true;
|
||||
return Ok((turn.build_assistant_message(), usage));
|
||||
}
|
||||
_ => turn.apply_event(&event),
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// The connection closed without an explicit `[DONE]` event. Some
|
||||
// providers legitimately omit it, so EOF alone isn't an error —
|
||||
// but if it leaves a tool call's arguments as unparsable JSON, the
|
||||
// response was truncated mid-generation, not finished. Report that
|
||||
// honestly instead of silently double-stringifying the fragment
|
||||
// into a tool call that will misbehave (e.g. a `write` call with a
|
||||
// half-written file body).
|
||||
if let Some((name, err)) = turn.incomplete_tool_call() {
|
||||
anyhow::bail!("stream ended before tool call '{name}' arguments were complete: {err}");
|
||||
}
|
||||
|
||||
turn.is_complete = true;
|
||||
Ok((turn.build_assistant_message(), usage))
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user