| 1 | //! HTTP client for DeepSeek's OpenAI-compatible Chat Completions API. |
| 2 | //! |
| 3 | //! DeepSeek documents `/chat/completions` as the primary endpoint, and this |
| 4 | //! client now routes all normal traffic through that surface. |
| 5 | |
| 6 | use std::collections::HashMap; |
| 7 | use std::sync::{Arc, Mutex as StdMutex, OnceLock}; |
| 8 | use std::time::{Duration, Instant}; |
| 9 | |
| 10 | use anyhow::{Context, Result}; |
| 11 | use reqwest::header::{AUTHORIZATION, CONTENT_TYPE, HeaderMap, HeaderName, HeaderValue}; |
| 12 | use serde::{Deserialize, Serialize}; |
| 13 | use serde_json::{Value, json}; |
| 14 | use tokio::sync::Mutex as AsyncMutex; |
| 15 | |
| 16 | use crate::config::{ApiProvider, Config, RetryPolicy}; |
| 17 | use crate::llm_client::{ |
| 18 | LlmClient, LlmError, RetryConfig as LlmRetryConfig, extract_retry_after, with_retry, |
| 19 | }; |
| 20 | use crate::logging; |
| 21 | use crate::models::{MessageRequest, MessageResponse, ServerToolUsage, SystemPrompt, Usage}; |
| 22 | |
| 23 | pub(super) fn to_api_tool_name(name: &str) -> String { |
| 24 | let mut out = String::new(); |
| 25 | for ch in name.chars() { |
| 26 | if ch.is_ascii_alphanumeric() || ch == '_' { |
| 27 | out.push(ch); |
| 28 | } else if ch == '-' { |
| 29 | out.push_str("--"); |
| 30 | } else { |
| 31 | out.push_str("-x"); |
| 32 | out.push_str(&format!("{:06X}", ch as u32)); |
| 33 | out.push('-'); |
| 34 | } |
| 35 | } |
| 36 | out |
| 37 | } |
| 38 | |
| 39 | pub(super) fn from_api_tool_name(name: &str) -> String { |
| 40 | let mut out = String::new(); |
| 41 | let mut iter = name.chars().peekable(); |
| 42 | while let Some(ch) = iter.next() { |
| 43 | if ch != '-' { |
| 44 | out.push(ch); |
| 45 | continue; |
| 46 | } |
| 47 | if let Some('-') = iter.peek().copied() { |
| 48 | iter.next(); |
| 49 | out.push('-'); |
| 50 | continue; |
| 51 | } |
| 52 | if iter.peek().copied() == Some('x') { |
| 53 | iter.next(); |
| 54 | let mut hex = String::new(); |
| 55 | for _ in 0..6 { |
| 56 | if let Some(h) = iter.next() { |
| 57 | hex.push(h); |
| 58 | } else { |
| 59 | break; |
| 60 | } |
| 61 | } |
| 62 | if let Ok(code) = u32::from_str_radix(&hex, 16) |
| 63 | && let Some(decoded) = std::char::from_u32(code) |
| 64 | { |
| 65 | if let Some('-') = iter.peek().copied() { |
| 66 | iter.next(); |
| 67 | } |
| 68 | out.push(decoded); |
| 69 | continue; |
| 70 | } |
| 71 | out.push('-'); |
| 72 | out.push('x'); |
| 73 | out.push_str(&hex); |
| 74 | continue; |
| 75 | } |
| 76 | out.push('-'); |
| 77 | } |
| 78 | |
| 79 | // Second pass: decode bare hex escapes (e.g. `x00002E`) that the model |
| 80 | // may produce when it mangles the `-x00002E-` delimiter form. Only |
| 81 | // decode when the resulting character is one that `to_api_tool_name` |
| 82 | // would have encoded (not alphanumeric, not `_`, not `-`). |
| 83 | decode_bare_hex_escapes(&out) |
| 84 | } |
| 85 | |
| 86 | /// Decode bare `x[0-9A-Fa-f]{6}` sequences (optionally followed by `-`) |
| 87 | /// that survive the standard delimiter-based pass. This handles cases |
| 88 | /// where the model strips or replaces the leading `-` of `-x00002E-`. |
| 89 | pub(super) fn decode_bare_hex_escapes(input: &str) -> String { |
| 90 | use regex::Regex; |
| 91 | use std::sync::OnceLock; |
| 92 | |
| 93 | static RE: OnceLock<Regex> = OnceLock::new(); |
| 94 | let re = RE.get_or_init(|| Regex::new(r"x([0-9A-Fa-f]{6})-?").unwrap()); |
| 95 | |
| 96 | let result = re.replace_all(input, |caps: ®ex::Captures| { |
| 97 | let hex = &caps[1]; |
| 98 | if let Ok(code) = u32::from_str_radix(hex, 16) |
| 99 | && let Some(decoded) = std::char::from_u32(code) |
| 100 | { |
| 101 | // Only decode characters that to_api_tool_name would have encoded |
| 102 | if !decoded.is_ascii_alphanumeric() && decoded != '_' && decoded != '-' { |
| 103 | return decoded.to_string(); |
| 104 | } |
| 105 | } |
| 106 | // Not a character we'd encode — leave as-is |
| 107 | caps[0].to_string() |
| 108 | }); |
| 109 | result.into_owned() |
| 110 | } |
| 111 | |
| 112 | // === Types === |
| 113 | |
| 114 | /// Model descriptor returned by the provider's `/v1/models` endpoint. |
| 115 | #[derive(Debug, Clone, Serialize, PartialEq, Eq)] |
| 116 | pub struct AvailableModel { |
| 117 | pub id: String, |
| 118 | pub owned_by: Option<String>, |
| 119 | pub created: Option<u64>, |
| 120 | } |
| 121 | |
| 122 | /// Client for DeepSeek's OpenAI-compatible APIs. |
| 123 | #[must_use] |
| 124 | pub struct DeepSeekClient { |
| 125 | pub(super) http_client: reqwest::Client, |
| 126 | api_key: String, |
| 127 | pub(super) base_url: String, |
| 128 | pub(super) api_provider: ApiProvider, |
| 129 | retry: RetryPolicy, |
| 130 | default_model: String, |
| 131 | connection_health: Arc<AsyncMutex<ConnectionHealth>>, |
| 132 | rate_limiter: Arc<AsyncMutex<TokenBucket>>, |
| 133 | } |
| 134 | |
| 135 | const CONNECTION_FAILURE_THRESHOLD: u32 = 2; |
| 136 | const RECOVERY_PROBE_COOLDOWN: Duration = Duration::from_secs(15); |
| 137 | |
| 138 | const DEFAULT_CLIENT_RATE_LIMIT_RPS: f64 = 8.0; |
| 139 | const DEFAULT_CLIENT_RATE_LIMIT_BURST: f64 = 16.0; |
| 140 | const ALLOW_INSECURE_HTTP_ENV: &str = "DEEPSEEK_ALLOW_INSECURE_HTTP"; |
| 141 | |
| 142 | pub(super) const SSE_BACKPRESSURE_HIGH_WATERMARK: usize = 8 * 1024 * 1024; // 8 MB |
| 143 | pub(super) const SSE_BACKPRESSURE_SLEEP_MS: u64 = 10; |
| 144 | pub(super) const SSE_MAX_LINES_PER_CHUNK: usize = 256; |
| 145 | |
| 146 | #[derive(Debug, Clone, Copy, PartialEq, Eq)] |
| 147 | enum ConnectionState { |
| 148 | Healthy, |
| 149 | Degraded, |
| 150 | Recovering, |
| 151 | } |
| 152 | |
| 153 | #[derive(Debug)] |
| 154 | struct ConnectionHealth { |
| 155 | state: ConnectionState, |
| 156 | consecutive_failures: u32, |
| 157 | last_failure: Option<Instant>, |
| 158 | last_success: Option<Instant>, |
| 159 | last_probe: Option<Instant>, |
| 160 | } |
| 161 | |
| 162 | impl Default for ConnectionHealth { |
| 163 | fn default() -> Self { |
| 164 | Self { |
| 165 | state: ConnectionState::Healthy, |
| 166 | consecutive_failures: 0, |
| 167 | last_failure: None, |
| 168 | last_success: None, |
| 169 | last_probe: None, |
| 170 | } |
| 171 | } |
| 172 | } |
| 173 | |
| 174 | #[derive(Debug)] |
| 175 | struct TokenBucket { |
| 176 | enabled: bool, |
| 177 | capacity: f64, |
| 178 | tokens: f64, |
| 179 | refill_per_sec: f64, |
| 180 | last_refill: Instant, |
| 181 | } |
| 182 | |
| 183 | impl TokenBucket { |
| 184 | fn from_env() -> Self { |
| 185 | let rps = std::env::var("DEEPSEEK_RATE_LIMIT_RPS") |
| 186 | .ok() |
| 187 | .and_then(|v| v.parse::<f64>().ok()) |
| 188 | .unwrap_or(DEFAULT_CLIENT_RATE_LIMIT_RPS) |
| 189 | .max(0.0); |
| 190 | let burst = std::env::var("DEEPSEEK_RATE_LIMIT_BURST") |
| 191 | .ok() |
| 192 | .and_then(|v| v.parse::<f64>().ok()) |
| 193 | .unwrap_or(DEFAULT_CLIENT_RATE_LIMIT_BURST) |
| 194 | .max(1.0); |
| 195 | let enabled = rps > 0.0; |
| 196 | Self { |
| 197 | enabled, |
| 198 | capacity: burst, |
| 199 | tokens: burst, |
| 200 | refill_per_sec: rps, |
| 201 | last_refill: Instant::now(), |
| 202 | } |
| 203 | } |
| 204 | |
| 205 | fn refill(&mut self, now: Instant) { |
| 206 | if !self.enabled { |
| 207 | return; |
| 208 | } |
| 209 | let elapsed = now.duration_since(self.last_refill).as_secs_f64(); |
| 210 | self.last_refill = now; |
| 211 | self.tokens = (self.tokens + elapsed * self.refill_per_sec).min(self.capacity); |
| 212 | } |
| 213 | |
| 214 | fn delay_until_available(&mut self, tokens: f64) -> Option<Duration> { |
| 215 | if !self.enabled { |
| 216 | return None; |
| 217 | } |
| 218 | let now = Instant::now(); |
| 219 | self.refill(now); |
| 220 | if self.tokens >= tokens { |
| 221 | self.tokens -= tokens; |
| 222 | return None; |
| 223 | } |
| 224 | let needed = tokens - self.tokens; |
| 225 | self.tokens = 0.0; |
| 226 | if self.refill_per_sec <= 0.0 { |
| 227 | return Some(Duration::from_secs(1)); |
| 228 | } |
| 229 | Some(Duration::from_secs_f64(needed / self.refill_per_sec)) |
| 230 | } |
| 231 | } |
| 232 | |
| 233 | fn apply_request_success(health: &mut ConnectionHealth, now: Instant) -> bool { |
| 234 | let recovered = health.state != ConnectionState::Healthy; |
| 235 | health.state = ConnectionState::Healthy; |
| 236 | health.consecutive_failures = 0; |
| 237 | health.last_success = Some(now); |
| 238 | recovered |
| 239 | } |
| 240 | |
| 241 | fn apply_request_failure(health: &mut ConnectionHealth, now: Instant) { |
| 242 | health.consecutive_failures = health.consecutive_failures.saturating_add(1); |
| 243 | health.last_failure = Some(now); |
| 244 | if health.consecutive_failures >= CONNECTION_FAILURE_THRESHOLD { |
| 245 | health.state = ConnectionState::Degraded; |
| 246 | } |
| 247 | } |
| 248 | |
| 249 | fn mark_recovery_probe_if_due(health: &mut ConnectionHealth, now: Instant) -> bool { |
| 250 | if health.state == ConnectionState::Healthy { |
| 251 | return false; |
| 252 | } |
| 253 | if health |
| 254 | .last_probe |
| 255 | .is_some_and(|last| now.duration_since(last) < RECOVERY_PROBE_COOLDOWN) |
| 256 | { |
| 257 | return false; |
| 258 | } |
| 259 | health.last_probe = Some(now); |
| 260 | health.state = ConnectionState::Recovering; |
| 261 | true |
| 262 | } |
| 263 | |
| 264 | fn buffer_pool() -> &'static StdMutex<Vec<Vec<u8>>> { |
| 265 | static POOL: OnceLock<StdMutex<Vec<Vec<u8>>>> = OnceLock::new(); |
| 266 | POOL.get_or_init(|| StdMutex::new(Vec::new())) |
| 267 | } |
| 268 | |
| 269 | fn acquire_stream_buffer() -> Vec<u8> { |
| 270 | if let Ok(mut pool) = buffer_pool().lock() { |
| 271 | pool.pop().unwrap_or_else(|| Vec::with_capacity(8192)) |
| 272 | } else { |
| 273 | Vec::with_capacity(8192) |
| 274 | } |
| 275 | } |
| 276 | |
| 277 | fn release_stream_buffer(mut buf: Vec<u8>) { |
| 278 | buf.clear(); |
| 279 | if buf.capacity() > 256 * 1024 { |
| 280 | buf.shrink_to(256 * 1024); |
| 281 | } |
| 282 | if let Ok(mut pool) = buffer_pool().lock() |
| 283 | && pool.len() < 8 |
| 284 | { |
| 285 | pool.push(buf); |
| 286 | } |
| 287 | } |
| 288 | |
| 289 | impl Clone for DeepSeekClient { |
| 290 | fn clone(&self) -> Self { |
| 291 | Self { |
| 292 | http_client: self.http_client.clone(), |
| 293 | api_key: self.api_key.clone(), |
| 294 | base_url: self.base_url.clone(), |
| 295 | api_provider: self.api_provider, |
| 296 | retry: self.retry.clone(), |
| 297 | default_model: self.default_model.clone(), |
| 298 | connection_health: self.connection_health.clone(), |
| 299 | rate_limiter: self.rate_limiter.clone(), |
| 300 | } |
| 301 | } |
| 302 | } |
| 303 | |
| 304 | // === Helpers === |
| 305 | |
| 306 | /// Maximum bytes to read from an error response body (64 KB). |
| 307 | pub(super) const ERROR_BODY_MAX_BYTES: usize = 64 * 1024; |
| 308 | |
| 309 | /// Read an error response body with a size limit to prevent unbounded allocation. |
| 310 | pub(super) async fn bounded_error_text(response: reqwest::Response, max_bytes: usize) -> String { |
| 311 | use futures_util::StreamExt; |
| 312 | let mut stream = response.bytes_stream(); |
| 313 | let mut buf = Vec::with_capacity(max_bytes.min(8192)); |
| 314 | while let Some(chunk) = stream.next().await { |
| 315 | let Ok(chunk) = chunk else { break }; |
| 316 | let remaining = max_bytes.saturating_sub(buf.len()); |
| 317 | if remaining == 0 { |
| 318 | break; |
| 319 | } |
| 320 | buf.extend_from_slice(&chunk[..chunk.len().min(remaining)]); |
| 321 | } |
| 322 | String::from_utf8_lossy(&buf).into_owned() |
| 323 | } |
| 324 | |
| 325 | fn validate_base_url_security(base_url: &str) -> Result<()> { |
| 326 | if base_url.starts_with("https://") |
| 327 | || base_url.starts_with("http://localhost") |
| 328 | || base_url.starts_with("http://127.0.0.1") |
| 329 | || base_url.starts_with("http://[::1]") |
| 330 | { |
| 331 | return Ok(()); |
| 332 | } |
| 333 | |
| 334 | if base_url.starts_with("http://") |
| 335 | && std::env::var(ALLOW_INSECURE_HTTP_ENV) |
| 336 | .ok() |
| 337 | .as_deref() |
| 338 | .is_some_and(|v| v == "1" || v.eq_ignore_ascii_case("true")) |
| 339 | { |
| 340 | logging::warn(format!( |
| 341 | "Using insecure HTTP base URL because {} is set", |
| 342 | ALLOW_INSECURE_HTTP_ENV |
| 343 | )); |
| 344 | return Ok(()); |
| 345 | } |
| 346 | |
| 347 | if base_url.starts_with("http://") { |
| 348 | anyhow::bail!( |
| 349 | "Refusing insecure base URL '{}'. Use HTTPS or set {}=1 to override for trusted environments.", |
| 350 | base_url, |
| 351 | ALLOW_INSECURE_HTTP_ENV |
| 352 | ); |
| 353 | } |
| 354 | |
| 355 | anyhow::bail!( |
| 356 | "Refusing base URL '{}': only HTTPS (or explicitly allowed HTTP) URLs are supported.", |
| 357 | base_url, |
| 358 | ) |
| 359 | } |
| 360 | |
| 361 | pub(super) fn versioned_base_url(base_url: &str) -> String { |
| 362 | let trimmed = base_url.trim_end_matches('/'); |
| 363 | if trimmed.ends_with("/v1") || trimmed.ends_with("/beta") { |
| 364 | trimmed.to_string() |
| 365 | } else { |
| 366 | format!("{trimmed}/v1") |
| 367 | } |
| 368 | } |
| 369 | |
| 370 | pub(super) fn api_url(base_url: &str, path: &str) -> String { |
| 371 | format!( |
| 372 | "{}/{}", |
| 373 | versioned_base_url(base_url).trim_end_matches('/'), |
| 374 | path.trim_start_matches('/') |
| 375 | ) |
| 376 | } |
| 377 | |
| 378 | // === DeepSeekClient === |
| 379 | |
| 380 | /// Returns true when DEEPSEEK_FORCE_HTTP1 is set to a truthy value |
| 381 | /// (`1`, `true`, `yes`, `on`, case-insensitive). Used by `build_http_client` |
| 382 | /// to opt out of HTTP/2 entirely when DeepSeek's edge mishandles long-lived H2 |
| 383 | /// streams (#103). Anything else (unset, `0`, `false`, ...) leaves HTTP/2 on. |
| 384 | fn force_http1_from_env() -> bool { |
| 385 | std::env::var("DEEPSEEK_FORCE_HTTP1") |
| 386 | .ok() |
| 387 | .map(|v| v.trim().to_ascii_lowercase()) |
| 388 | .is_some_and(|v| matches!(v.as_str(), "1" | "true" | "yes" | "on")) |
| 389 | } |
| 390 | |
| 391 | /// Read `SSL_CERT_FILE` and add its contents as extra root |
| 392 | /// certificates on the reqwest builder (#418). Tries the PEM-bundle |
| 393 | /// parser first (covers single-cert files too), then falls back to |
| 394 | /// DER. All failures log a warning and return the builder unchanged |
| 395 | /// so a malformed env var degrades gracefully. |
| 396 | fn add_extra_root_certs( |
| 397 | mut builder: reqwest::ClientBuilder, |
| 398 | cert_path: &str, |
| 399 | ) -> reqwest::ClientBuilder { |
| 400 | let bytes = match std::fs::read(cert_path) { |
| 401 | Ok(b) => b, |
| 402 | Err(err) => { |
| 403 | logging::warn(format!( |
| 404 | "SSL_CERT_FILE={cert_path} could not be read: {err}" |
| 405 | )); |
| 406 | return builder; |
| 407 | } |
| 408 | }; |
| 409 | |
| 410 | if let Ok(certs) = reqwest::Certificate::from_pem_bundle(&bytes) { |
| 411 | let added = certs.len(); |
| 412 | for cert in certs { |
| 413 | builder = builder.add_root_certificate(cert); |
| 414 | } |
| 415 | logging::info(format!( |
| 416 | "SSL_CERT_FILE={cert_path} loaded ({added} cert(s))" |
| 417 | )); |
| 418 | return builder; |
| 419 | } |
| 420 | |
| 421 | match reqwest::Certificate::from_der(&bytes) { |
| 422 | Ok(cert) => { |
| 423 | builder = builder.add_root_certificate(cert); |
| 424 | logging::info(format!("SSL_CERT_FILE={cert_path} loaded (1 DER cert)")); |
| 425 | } |
| 426 | Err(err) => { |
| 427 | logging::warn(format!( |
| 428 | "SSL_CERT_FILE={cert_path} could not be parsed as PEM bundle or DER: {err}" |
| 429 | )); |
| 430 | } |
| 431 | } |
| 432 | builder |
| 433 | } |
| 434 | |
| 435 | impl DeepSeekClient { |
| 436 | /// Create a DeepSeek client from CLI configuration. |
| 437 | pub fn new(config: &Config) -> Result<Self> { |
| 438 | let api_key = config.deepseek_api_key()?; |
| 439 | let base_url = config.deepseek_base_url(); |
| 440 | let api_provider = config.api_provider(); |
| 441 | validate_base_url_security(&base_url)?; |
| 442 | let retry = config.retry_policy(); |
| 443 | let default_model = config.default_model(); |
| 444 | let http_headers = config.http_headers(); |
| 445 | |
| 446 | logging::info(format!("API provider: {}", api_provider.as_str())); |
| 447 | logging::info(format!("API base URL: {base_url}")); |
| 448 | if !http_headers.is_empty() { |
| 449 | logging::info(format!( |
| 450 | "{} custom HTTP header(s) configured", |
| 451 | http_headers.len() |
| 452 | )); |
| 453 | } |
| 454 | logging::info(format!( |
| 455 | "Retry policy: enabled={}, max_retries={}, initial_delay={}s, max_delay={}s", |
| 456 | retry.enabled, retry.max_retries, retry.initial_delay, retry.max_delay |
| 457 | )); |
| 458 | |
| 459 | let http_client = Self::build_http_client(&api_key, &http_headers)?; |
| 460 | |
| 461 | Ok(Self { |
| 462 | http_client, |
| 463 | api_key, |
| 464 | base_url, |
| 465 | api_provider, |
| 466 | retry, |
| 467 | default_model, |
| 468 | connection_health: Arc::new(AsyncMutex::new(ConnectionHealth::default())), |
| 469 | rate_limiter: Arc::new(AsyncMutex::new(TokenBucket::from_env())), |
| 470 | }) |
| 471 | } |
| 472 | |
| 473 | fn build_http_client( |
| 474 | api_key: &str, |
| 475 | extra_headers: &HashMap<String, String>, |
| 476 | ) -> Result<reqwest::Client> { |
| 477 | let headers = build_default_headers(api_key, extra_headers)?; |
| 478 | let mut builder = reqwest::Client::builder() |
| 479 | .default_headers(headers) |
| 480 | .connect_timeout(Duration::from_secs(30)) |
| 481 | .tcp_keepalive(Some(Duration::from_secs(30))) |
| 482 | .http2_keep_alive_interval(Some(Duration::from_secs(15))) |
| 483 | .http2_keep_alive_timeout(Duration::from_secs(20)) |
| 484 | .min_tls_version(reqwest::tls::Version::TLS_1_2); |
| 485 | if force_http1_from_env() { |
| 486 | logging::info("DEEPSEEK_FORCE_HTTP1=1 — pinning HTTP client to HTTP/1.1"); |
| 487 | builder = builder.http1_only(); |
| 488 | } |
| 489 | if let Ok(cert_path) = std::env::var("SSL_CERT_FILE") |
| 490 | && !cert_path.is_empty() |
| 491 | { |
| 492 | builder = add_extra_root_certs(builder, &cert_path); |
| 493 | } |
| 494 | builder.build().map_err(Into::into) |
| 495 | } |
| 496 | |
| 497 | #[cfg(test)] |
| 498 | fn default_headers( |
| 499 | api_key: &str, |
| 500 | extra_headers: &HashMap<String, String>, |
| 501 | ) -> Result<HeaderMap> { |
| 502 | build_default_headers(api_key, extra_headers) |
| 503 | } |
| 504 | } |
| 505 | |
| 506 | fn build_default_headers( |
| 507 | api_key: &str, |
| 508 | extra_headers: &HashMap<String, String>, |
| 509 | ) -> Result<HeaderMap> { |
| 510 | let mut headers = HeaderMap::new(); |
| 511 | headers.insert(CONTENT_TYPE, HeaderValue::from_static("application/json")); |
| 512 | if !api_key.trim().is_empty() { |
| 513 | headers.insert( |
| 514 | AUTHORIZATION, |
| 515 | HeaderValue::from_str(&format!("Bearer {api_key}"))?, |
| 516 | ); |
| 517 | } |
| 518 | for (name, value) in extra_headers { |
| 519 | let name = name.trim(); |
| 520 | let value = value.trim(); |
| 521 | if name.is_empty() || value.is_empty() { |
| 522 | continue; |
| 523 | } |
| 524 | let header_name = HeaderName::from_bytes(name.as_bytes())?; |
| 525 | if header_name == AUTHORIZATION || header_name == CONTENT_TYPE { |
| 526 | continue; |
| 527 | } |
| 528 | headers.insert(header_name, HeaderValue::from_str(value)?); |
| 529 | } |
| 530 | Ok(headers) |
| 531 | } |
| 532 | |
| 533 | impl DeepSeekClient { |
| 534 | /// List available models from the provider. |
| 535 | pub async fn list_models(&self) -> Result<Vec<AvailableModel>> { |
| 536 | let url = api_url(&self.base_url, "models"); |
| 537 | let response = self.send_with_retry(|| self.http_client.get(&url)).await?; |
| 538 | |
| 539 | let status = response.status(); |
| 540 | if !status.is_success() { |
| 541 | let error_text = bounded_error_text(response, ERROR_BODY_MAX_BYTES).await; |
| 542 | anyhow::bail!("Failed to list models: HTTP {status}: {error_text}"); |
| 543 | } |
| 544 | let response_text = response.text().await.unwrap_or_default(); |
| 545 | |
| 546 | parse_models_response(&response_text) |
| 547 | } |
| 548 | |
| 549 | async fn wait_for_rate_limit(&self) { |
| 550 | let maybe_delay = { |
| 551 | let mut limiter = self.rate_limiter.lock().await; |
| 552 | limiter.delay_until_available(1.0) |
| 553 | }; |
| 554 | if let Some(delay) = maybe_delay { |
| 555 | tokio::time::sleep(delay).await; |
| 556 | } |
| 557 | } |
| 558 | |
| 559 | async fn mark_request_success(&self) { |
| 560 | let mut health = self.connection_health.lock().await; |
| 561 | if apply_request_success(&mut health, Instant::now()) { |
| 562 | logging::info("Connection recovered"); |
| 563 | } |
| 564 | } |
| 565 | |
| 566 | async fn mark_request_failure(&self, reason: &str) { |
| 567 | let mut health = self.connection_health.lock().await; |
| 568 | apply_request_failure(&mut health, Instant::now()); |
| 569 | logging::warn(format!( |
| 570 | "Connection degraded (failures={}): {}", |
| 571 | health.consecutive_failures, reason |
| 572 | )); |
| 573 | } |
| 574 | |
| 575 | async fn maybe_probe_recovery(&self) { |
| 576 | let should_probe = { |
| 577 | let mut health = self.connection_health.lock().await; |
| 578 | mark_recovery_probe_if_due(&mut health, Instant::now()) |
| 579 | }; |
| 580 | if !should_probe { |
| 581 | return; |
| 582 | } |
| 583 | let health_url = api_url(&self.base_url, "models"); |
| 584 | let probe = self.http_client.get(health_url).send().await; |
| 585 | match probe { |
| 586 | Ok(resp) if resp.status().is_success() => { |
| 587 | self.mark_request_success().await; |
| 588 | logging::info("Recovery probe succeeded"); |
| 589 | } |
| 590 | Ok(resp) => { |
| 591 | self.mark_request_failure(&format!("probe status={}", resp.status())) |
| 592 | .await; |
| 593 | } |
| 594 | Err(err) => { |
| 595 | self.mark_request_failure(&format!("probe error={err}")) |
| 596 | .await; |
| 597 | } |
| 598 | } |
| 599 | } |
| 600 | |
| 601 | pub(super) async fn send_with_retry<F>(&self, mut build: F) -> Result<reqwest::Response> |
| 602 | where |
| 603 | F: FnMut() -> reqwest::RequestBuilder, |
| 604 | { |
| 605 | let retry_cfg: LlmRetryConfig = self.retry.clone().into(); |
| 606 | let request_result = with_retry( |
| 607 | &retry_cfg, |
| 608 | || { |
| 609 | let request = build(); |
| 610 | async move { |
| 611 | self.wait_for_rate_limit().await; |
| 612 | let response = request |
| 613 | .send() |
| 614 | .await |
| 615 | .map_err(|err| LlmError::from_reqwest(&err))?; |
| 616 | let status = response.status(); |
| 617 | if status.is_success() { |
| 618 | return Ok(response); |
| 619 | } |
| 620 | let retryable = status.as_u16() == 429 || status.is_server_error(); |
| 621 | if !retryable { |
| 622 | return Ok(response); |
| 623 | } |
| 624 | let retry_after = extract_retry_after(response.headers()); |
| 625 | let body = bounded_error_text(response, ERROR_BODY_MAX_BYTES).await; |
| 626 | Err(LlmError::from_http_response_with_retry_after( |
| 627 | status.as_u16(), |
| 628 | &body, |
| 629 | retry_after, |
| 630 | )) |
| 631 | } |
| 632 | }, |
| 633 | Some(Box::new(|err, attempt, delay| { |
| 634 | let (reason_label, human_reason) = retry_reason_label_and_human(err); |
| 635 | logging::warn(format!( |
| 636 | "HTTP retry reason={} attempt={} delay={:.2}s", |
| 637 | reason_label, |
| 638 | attempt + 1, |
| 639 | delay.as_secs_f64(), |
| 640 | )); |
| 641 | crate::retry_status::start(attempt + 1, delay, human_reason); |
| 642 | })), |
| 643 | ) |
| 644 | .await; |
| 645 | |
| 646 | match request_result { |
| 647 | Ok(response) => { |
| 648 | crate::retry_status::succeeded(); |
| 649 | self.mark_request_success().await; |
| 650 | Ok(response) |
| 651 | } |
| 652 | Err(err) => { |
| 653 | let last = err.last_error.to_string(); |
| 654 | if err.attempts > 1 { |
| 655 | crate::retry_status::failed(last.clone()); |
| 656 | } else { |
| 657 | crate::retry_status::clear(); |
| 658 | } |
| 659 | self.mark_request_failure(&last).await; |
| 660 | self.maybe_probe_recovery().await; |
| 661 | Err(anyhow::anyhow!(last)) |
| 662 | } |
| 663 | } |
| 664 | } |
| 665 | } |
| 666 | |
| 667 | /// Translate the structured `LlmError` into both a categorical label |
| 668 | /// (for structured logs / metrics) and a short human reason string |
| 669 | /// (for the retry banner). Returning both from one match avoids the |
| 670 | /// double-classification we had before. |
| 671 | fn retry_reason_label_and_human(err: &LlmError) -> (&'static str, String) { |
| 672 | match err { |
| 673 | LlmError::RateLimited { retry_after, .. } => { |
| 674 | let human = if let Some(after) = retry_after { |
| 675 | format!("rate limited (Retry-After {}s)", after.as_secs()) |
| 676 | } else { |
| 677 | "rate limited".to_string() |
| 678 | }; |
| 679 | ("rate_limited", human) |
| 680 | } |
| 681 | LlmError::ServerError { status, .. } => ("server_error", format!("upstream {status}")), |
| 682 | LlmError::NetworkError(_) => ("network_error", "network error".to_string()), |
| 683 | LlmError::Timeout(_) => ("timeout", "timeout".to_string()), |
| 684 | _ => ("other", "other".to_string()), |
| 685 | } |
| 686 | } |
| 687 | |
| 688 | impl LlmClient for DeepSeekClient { |
| 689 | fn provider_name(&self) -> &'static str { |
| 690 | self.api_provider.as_str() |
| 691 | } |
| 692 | |
| 693 | fn model(&self) -> &str { |
| 694 | &self.default_model |
| 695 | } |
| 696 | |
| 697 | async fn health_check(&self) -> Result<bool> { |
| 698 | let health_url = api_url(&self.base_url, "models"); |
| 699 | self.wait_for_rate_limit().await; |
| 700 | let response = self.http_client.get(health_url).send().await; |
| 701 | match response { |
| 702 | Ok(resp) if resp.status().is_success() => { |
| 703 | self.mark_request_success().await; |
| 704 | Ok(true) |
| 705 | } |
| 706 | Ok(resp) => { |
| 707 | self.mark_request_failure(&format!("health status={}", resp.status())) |
| 708 | .await; |
| 709 | Ok(false) |
| 710 | } |
| 711 | Err(err) => { |
| 712 | self.mark_request_failure(&format!("health error={err}")) |
| 713 | .await; |
| 714 | Ok(false) |
| 715 | } |
| 716 | } |
| 717 | } |
| 718 | |
| 719 | async fn create_message(&self, request: MessageRequest) -> Result<MessageResponse> { |
| 720 | self.create_message_chat(&request).await |
| 721 | } |
| 722 | |
| 723 | async fn create_message_stream( |
| 724 | &self, |
| 725 | request: MessageRequest, |
| 726 | ) -> Result<crate::llm_client::StreamEventBox> { |
| 727 | self.handle_chat_completion_stream(request).await |
| 728 | } |
| 729 | } |
| 730 | |
| 731 | #[derive(Debug, Deserialize)] |
| 732 | struct ModelsListResponse { |
| 733 | data: Vec<ModelListItem>, |
| 734 | } |
| 735 | |
| 736 | #[derive(Debug, Deserialize)] |
| 737 | struct ModelListItem { |
| 738 | id: String, |
| 739 | #[serde(default)] |
| 740 | owned_by: Option<String>, |
| 741 | #[serde(default)] |
| 742 | created: Option<u64>, |
| 743 | } |
| 744 | |
| 745 | pub(super) fn parse_models_response(payload: &str) -> Result<Vec<AvailableModel>> { |
| 746 | let parsed: ModelsListResponse = |
| 747 | serde_json::from_str(payload).context("Failed to parse model list JSON")?; |
| 748 | |
| 749 | let mut models = parsed |
| 750 | .data |
| 751 | .into_iter() |
| 752 | .map(|item| AvailableModel { |
| 753 | id: item.id, |
| 754 | owned_by: item.owned_by, |
| 755 | created: item.created, |
| 756 | }) |
| 757 | .collect::<Vec<_>>(); |
| 758 | models.sort_by(|a, b| a.id.cmp(&b.id)); |
| 759 | models.dedup_by(|a, b| a.id == b.id); |
| 760 | Ok(models) |
| 761 | } |
| 762 | |
| 763 | pub(super) fn system_to_instructions(system: Option<SystemPrompt>) -> Option<String> { |
| 764 | match system { |
| 765 | Some(SystemPrompt::Text(text)) => Some(text), |
| 766 | Some(SystemPrompt::Blocks(blocks)) => { |
| 767 | let joined = blocks |
| 768 | .into_iter() |
| 769 | .map(|b| b.text) |
| 770 | .collect::<Vec<_>>() |
| 771 | .join("\n\n---\n\n"); |
| 772 | if joined.trim().is_empty() { |
| 773 | None |
| 774 | } else { |
| 775 | Some(joined) |
| 776 | } |
| 777 | } |
| 778 | None => None, |
| 779 | } |
| 780 | } |
| 781 | |
| 782 | pub(super) fn apply_reasoning_effort( |
| 783 | body: &mut Value, |
| 784 | effort: Option<&str>, |
| 785 | provider: ApiProvider, |
| 786 | ) { |
| 787 | let Some(effort) = effort else { |
| 788 | return; |
| 789 | }; |
| 790 | let normalized = effort.trim().to_ascii_lowercase(); |
| 791 | match normalized.as_str() { |
| 792 | "off" | "disabled" | "none" | "false" => match provider { |
| 793 | ApiProvider::Deepseek |
| 794 | | ApiProvider::DeepseekCN |
| 795 | | ApiProvider::Openrouter |
| 796 | | ApiProvider::Novita |
| 797 | | ApiProvider::Fireworks |
| 798 | | ApiProvider::Sglang |
| 799 | | ApiProvider::Vllm => { |
| 800 | body["thinking"] = json!({ "type": "disabled" }); |
| 801 | } |
| 802 | ApiProvider::NvidiaNim => { |
| 803 | body["chat_template_kwargs"] = json!({ |
| 804 | "thinking": false, |
| 805 | }); |
| 806 | } |
| 807 | }, |
| 808 | "low" | "minimal" | "medium" | "mid" | "high" | "" => match provider { |
| 809 | ApiProvider::Deepseek |
| 810 | | ApiProvider::DeepseekCN |
| 811 | | ApiProvider::Openrouter |
| 812 | | ApiProvider::Novita |
| 813 | | ApiProvider::Fireworks |
| 814 | | ApiProvider::Sglang |
| 815 | | ApiProvider::Vllm => { |
| 816 | body["reasoning_effort"] = json!("high"); |
| 817 | body["thinking"] = json!({ "type": "enabled" }); |
| 818 | } |
| 819 | ApiProvider::NvidiaNim => { |
| 820 | body["chat_template_kwargs"] = json!({ |
| 821 | "thinking": true, |
| 822 | "reasoning_effort": "high", |
| 823 | }); |
| 824 | } |
| 825 | }, |
| 826 | "xhigh" | "max" | "highest" => match provider { |
| 827 | ApiProvider::Deepseek |
| 828 | | ApiProvider::DeepseekCN |
| 829 | | ApiProvider::Openrouter |
| 830 | | ApiProvider::Novita |
| 831 | | ApiProvider::Fireworks |
| 832 | | ApiProvider::Sglang |
| 833 | | ApiProvider::Vllm => { |
| 834 | body["reasoning_effort"] = json!("max"); |
| 835 | body["thinking"] = json!({ "type": "enabled" }); |
| 836 | } |
| 837 | ApiProvider::NvidiaNim => { |
| 838 | body["chat_template_kwargs"] = json!({ |
| 839 | "thinking": true, |
| 840 | "reasoning_effort": "max", |
| 841 | }); |
| 842 | } |
| 843 | }, |
| 844 | _ => {} |
| 845 | } |
| 846 | } |
| 847 | |
| 848 | pub(super) fn parse_usage(usage: Option<&Value>) -> Usage { |
| 849 | let input_tokens = usage |
| 850 | .and_then(|u| u.get("input_tokens").or_else(|| u.get("prompt_tokens"))) |
| 851 | .and_then(Value::as_u64) |
| 852 | .unwrap_or(0); |
| 853 | let mut output_tokens = usage |
| 854 | .and_then(|u| { |
| 855 | u.get("output_tokens") |
| 856 | .or_else(|| u.get("completion_tokens")) |
| 857 | }) |
| 858 | .and_then(Value::as_u64) |
| 859 | .unwrap_or(0); |
| 860 | let reasoning_tokens_raw = usage |
| 861 | .and_then(|u| u.get("completion_tokens_details")) |
| 862 | .and_then(|details| details.get("reasoning_tokens")) |
| 863 | .and_then(Value::as_u64); |
| 864 | if output_tokens == 0 |
| 865 | && let Some(reasoning_tokens) = reasoning_tokens_raw |
| 866 | { |
| 867 | output_tokens = reasoning_tokens; |
| 868 | } |
| 869 | let cached_tokens = usage |
| 870 | .and_then(|u| u.get("prompt_tokens_details")) |
| 871 | .and_then(|details| details.get("cached_tokens")) |
| 872 | .and_then(Value::as_u64); |
| 873 | let prompt_cache_hit_tokens = usage |
| 874 | .and_then(|u| u.get("prompt_cache_hit_tokens")) |
| 875 | .and_then(Value::as_u64) |
| 876 | .or(cached_tokens) |
| 877 | .map(|v| v as u32); |
| 878 | let prompt_cache_miss_tokens = usage |
| 879 | .and_then(|u| u.get("prompt_cache_miss_tokens")) |
| 880 | .and_then(Value::as_u64) |
| 881 | .or_else(|| cached_tokens.map(|cached| input_tokens.saturating_sub(cached))) |
| 882 | .map(|v| v as u32); |
| 883 | let reasoning_tokens = reasoning_tokens_raw.map(|v| v as u32); |
| 884 | |
| 885 | let server_tool_use = usage.and_then(|u| u.get("server_tool_use")).map(|server| { |
| 886 | let code_execution_requests = server |
| 887 | .get("code_execution_requests") |
| 888 | .and_then(Value::as_u64) |
| 889 | .map(|v| v as u32); |
| 890 | let tool_search_requests = server |
| 891 | .get("tool_search_requests") |
| 892 | .and_then(Value::as_u64) |
| 893 | .map(|v| v as u32); |
| 894 | ServerToolUsage { |
| 895 | code_execution_requests, |
| 896 | tool_search_requests, |
| 897 | } |
| 898 | }); |
| 899 | |
| 900 | Usage { |
| 901 | input_tokens: input_tokens as u32, |
| 902 | output_tokens: output_tokens as u32, |
| 903 | prompt_cache_hit_tokens, |
| 904 | prompt_cache_miss_tokens, |
| 905 | reasoning_tokens, |
| 906 | reasoning_replay_tokens: None, |
| 907 | server_tool_use, |
| 908 | } |
| 909 | } |
| 910 | |
| 911 | impl DeepSeekClient { |
| 912 | /// Call the DeepSeek `/beta/completions` FIM endpoint. |
| 913 | pub async fn fim_completion( |
| 914 | &self, |
| 915 | model: &str, |
| 916 | prompt: &str, |
| 917 | suffix: &str, |
| 918 | max_tokens: u32, |
| 919 | ) -> anyhow::Result<String> { |
| 920 | let url = api_url(&self.base_url, "beta/completions"); |
| 921 | let body = json!({ |
| 922 | "model": model, |
| 923 | "prompt": prompt, |
| 924 | "suffix": suffix, |
| 925 | "max_tokens": max_tokens, |
| 926 | }); |
| 927 | let response = self |
| 928 | .send_with_retry(|| self.http_client.post(&url).json(&body)) |
| 929 | .await?; |
| 930 | let status = response.status(); |
| 931 | if !status.is_success() { |
| 932 | let error_text = bounded_error_text(response, ERROR_BODY_MAX_BYTES).await; |
| 933 | anyhow::bail!("FIM API error: HTTP {status}: {error_text}"); |
| 934 | } |
| 935 | let response_text = response.text().await.unwrap_or_default(); |
| 936 | let value: serde_json::Value = |
| 937 | serde_json::from_str(&response_text).context("Failed to parse FIM API response")?; |
| 938 | let text = value |
| 939 | .pointer("/choices/0/text") |
| 940 | .and_then(serde_json::Value::as_str) |
| 941 | .ok_or_else(|| anyhow::anyhow!("FIM response missing choices[0].text"))?; |
| 942 | Ok(text.to_string()) |
| 943 | } |
| 944 | } |
| 945 | |
| 946 | mod chat; |
| 947 | |
| 948 | #[cfg(test)] |
| 949 | mod tests { |
| 950 | use super::*; |
| 951 | use crate::client::chat::{ |
| 952 | build_chat_messages, build_chat_messages_for_request, count_reasoning_replay_chars, |
| 953 | parse_chat_message, parse_sse_chunk, sanitize_thinking_mode_messages, tool_to_chat, |
| 954 | }; |
| 955 | use crate::models::{ |
| 956 | ContentBlock, ContentBlockStart, Delta, Message, MessageRequest, StreamEvent, Tool, |
| 957 | }; |
| 958 | use serde_json::json; |
| 959 | |
| 960 | #[test] |
| 961 | fn tool_name_roundtrip_dot() { |
| 962 | let original = "multi_tool_use.parallel"; |
| 963 | let encoded = to_api_tool_name(original); |
| 964 | assert_eq!(encoded, "multi_tool_use-x00002E-parallel"); |
| 965 | let decoded = from_api_tool_name(&encoded); |
| 966 | assert_eq!(decoded, original); |
| 967 | } |
| 968 | |
| 969 | #[test] |
| 970 | fn tool_name_decode_mangled_dot_prefix() { |
| 971 | let mangled = "multi_tool_use.x00002E-parallel"; |
| 972 | let decoded = from_api_tool_name(mangled); |
| 973 | assert_eq!(decoded, "multi_tool_use..parallel"); |
| 974 | } |
| 975 | |
| 976 | #[test] |
| 977 | fn tool_name_decode_bare_hex_no_trailing_dash() { |
| 978 | let mangled = "foo_x00002Ebar"; |
| 979 | let decoded = from_api_tool_name(mangled); |
| 980 | assert_eq!(decoded, "foo_.bar"); |
| 981 | } |
| 982 | |
| 983 | #[test] |
| 984 | fn tool_name_bare_hex_preserves_alnum() { |
| 985 | let input = "foox000041bar"; |
| 986 | let decoded = from_api_tool_name(input); |
| 987 | assert_eq!(decoded, input); |
| 988 | } |
| 989 | |
| 990 | #[test] |
| 991 | fn tool_name_bare_hex_preserves_underscore() { |
| 992 | let input = "foox00005Fbar"; |
| 993 | let decoded = from_api_tool_name(input); |
| 994 | assert_eq!(decoded, input); |
| 995 | } |
| 996 | |
| 997 | #[test] |
| 998 | fn tool_name_roundtrip_colon() { |
| 999 | let original = "mcp__server:tool_name"; |
| 1000 | let encoded = to_api_tool_name(original); |
| 1001 | let decoded = from_api_tool_name(&encoded); |
| 1002 | assert_eq!(decoded, original); |
| 1003 | } |
| 1004 | |
| 1005 | #[test] |
| 1006 | fn api_url_handles_default_v1_and_beta_base_urls() { |
| 1007 | assert_eq!( |
| 1008 | api_url("https://api.deepseek.com", "chat/completions"), |
| 1009 | "https://api.deepseek.com/v1/chat/completions" |
| 1010 | ); |
| 1011 | assert_eq!( |
| 1012 | api_url("https://api.deepseek.com/v1", "chat/completions"), |
| 1013 | "https://api.deepseek.com/v1/chat/completions" |
| 1014 | ); |
| 1015 | assert_eq!( |
| 1016 | api_url("https://api.deepseek.com/beta", "chat/completions"), |
| 1017 | "https://api.deepseek.com/beta/chat/completions" |
| 1018 | ); |
| 1019 | } |
| 1020 | |
| 1021 | #[test] |
| 1022 | fn default_headers_include_custom_headers_when_configured() { |
| 1023 | let mut extra = HashMap::new(); |
| 1024 | extra.insert("X-Model-Provider-Id".to_string(), "tongyi".to_string()); |
| 1025 | let headers = DeepSeekClient::default_headers("sk-test", &extra).expect("headers"); |
| 1026 | assert_eq!( |
| 1027 | headers |
| 1028 | .get("x-model-provider-id") |
| 1029 | .and_then(|value| value.to_str().ok()), |
| 1030 | Some("tongyi") |
| 1031 | ); |
| 1032 | } |
| 1033 | |
| 1034 | #[test] |
| 1035 | fn default_headers_ignore_blank_custom_headers() { |
| 1036 | let mut extra = HashMap::new(); |
| 1037 | extra.insert("X-Blank".to_string(), " ".to_string()); |
| 1038 | let headers = DeepSeekClient::default_headers("sk-test", &extra).expect("headers"); |
| 1039 | assert!(headers.get("x-blank").is_none()); |
| 1040 | } |
| 1041 | |
| 1042 | #[test] |
| 1043 | fn chat_messages_keep_reasoning_content_on_all_assistant_messages() { |
| 1044 | let message = Message { |
| 1045 | role: "assistant".to_string(), |
| 1046 | content: vec![ |
| 1047 | ContentBlock::Thinking { |
| 1048 | thinking: "plan".to_string(), |
| 1049 | }, |
| 1050 | ContentBlock::Text { |
| 1051 | text: "done".to_string(), |
| 1052 | cache_control: None, |
| 1053 | }, |
| 1054 | ], |
| 1055 | }; |
| 1056 | let out = build_chat_messages(None, &[message], "deepseek-v4-pro"); |
| 1057 | let assistant = out |
| 1058 | .iter() |
| 1059 | .find(|value| value.get("role").and_then(Value::as_str) == Some("assistant")) |
| 1060 | .expect("assistant message"); |
| 1061 | assert_eq!( |
| 1062 | assistant.get("content").and_then(Value::as_str), |
| 1063 | Some("done") |
| 1064 | ); |
| 1065 | assert_eq!( |
| 1066 | assistant.get("reasoning_content").and_then(Value::as_str), |
| 1067 | Some("plan"), |
| 1068 | "thinking-mode models must keep reasoning_content on all assistant messages" |
| 1069 | ); |
| 1070 | } |
| 1071 | |
| 1072 | #[test] |
| 1073 | fn chat_messages_replay_prior_tool_round_reasoning_after_new_user_turn() { |
| 1074 | let messages = vec![ |
| 1075 | Message { |
| 1076 | role: "user".to_string(), |
| 1077 | content: vec![ContentBlock::Text { |
| 1078 | text: "Need the date".to_string(), |
| 1079 | cache_control: None, |
| 1080 | }], |
| 1081 | }, |
| 1082 | Message { |
| 1083 | role: "assistant".to_string(), |
| 1084 | content: vec![ |
| 1085 | ContentBlock::Thinking { |
| 1086 | thinking: "Need to call a tool".to_string(), |
| 1087 | }, |
| 1088 | ContentBlock::ToolUse { |
| 1089 | id: "tool-1".to_string(), |
| 1090 | name: "get_date".to_string(), |
| 1091 | input: json!({}), |
| 1092 | caller: None, |
| 1093 | }, |
| 1094 | ], |
| 1095 | }, |
| 1096 | Message { |
| 1097 | role: "user".to_string(), |
| 1098 | content: vec![ContentBlock::ToolResult { |
| 1099 | tool_use_id: "tool-1".to_string(), |
| 1100 | content: "2026-04-23".to_string(), |
| 1101 | is_error: None, |
| 1102 | content_blocks: None, |
| 1103 | }], |
| 1104 | }, |
| 1105 | Message { |
| 1106 | role: "assistant".to_string(), |
| 1107 | content: vec![ContentBlock::Text { |
| 1108 | text: "It is 2026-04-23.".to_string(), |
| 1109 | cache_control: None, |
| 1110 | }], |
| 1111 | }, |
| 1112 | Message { |
| 1113 | role: "user".to_string(), |
| 1114 | content: vec![ContentBlock::Text { |
| 1115 | text: "Thanks. Next question.".to_string(), |
| 1116 | cache_control: None, |
| 1117 | }], |
| 1118 | }, |
| 1119 | ]; |
| 1120 | let out = build_chat_messages(None, &messages, "deepseek-v4-pro"); |
| 1121 | let tool_assistant = out |
| 1122 | .iter() |
| 1123 | .find(|value| { |
| 1124 | value.get("role").and_then(Value::as_str) == Some("assistant") |
| 1125 | && value.get("tool_calls").is_some() |
| 1126 | }) |
| 1127 | .expect("tool-call assistant message"); |
| 1128 | assert_eq!( |
| 1129 | tool_assistant |
| 1130 | .get("reasoning_content") |
| 1131 | .and_then(Value::as_str), |
| 1132 | Some("Need to call a tool"), |
| 1133 | "thinking-mode tool rounds must replay reasoning_content on later requests" |
| 1134 | ); |
| 1135 | } |
| 1136 | |
| 1137 | #[test] |
| 1138 | fn chat_messages_allow_tool_round_without_reasoning_when_thinking_disabled() { |
| 1139 | let request = MessageRequest { |
| 1140 | model: "deepseek-v4-pro".to_string(), |
| 1141 | messages: vec![ |
| 1142 | Message { |
| 1143 | role: "assistant".to_string(), |
| 1144 | content: vec![ContentBlock::ToolUse { |
| 1145 | id: "call-no-thinking".to_string(), |
| 1146 | name: "read_file".to_string(), |
| 1147 | input: json!({"path": "Cargo.toml"}), |
| 1148 | caller: None, |
| 1149 | }], |
| 1150 | }, |
| 1151 | Message { |
| 1152 | role: "user".to_string(), |
| 1153 | content: vec![ContentBlock::ToolResult { |
| 1154 | tool_use_id: "call-no-thinking".to_string(), |
| 1155 | content: "workspace manifest".to_string(), |
| 1156 | is_error: None, |
| 1157 | content_blocks: None, |
| 1158 | }], |
| 1159 | }, |
| 1160 | ], |
| 1161 | max_tokens: 1024, |
| 1162 | system: None, |
| 1163 | tools: None, |
| 1164 | tool_choice: None, |
| 1165 | metadata: None, |
| 1166 | thinking: None, |
| 1167 | reasoning_effort: Some("off".to_string()), |
| 1168 | stream: None, |
| 1169 | temperature: None, |
| 1170 | top_p: None, |
| 1171 | }; |
| 1172 | |
| 1173 | let out = build_chat_messages_for_request(&request); |
| 1174 | assert!( |
| 1175 | out.iter().any( |
| 1176 | |value| value.get("role").and_then(Value::as_str) == Some("assistant") |
| 1177 | && value.get("tool_calls").is_some() |
| 1178 | ), |
| 1179 | "tool calls remain valid when thinking mode is disabled" |
| 1180 | ); |
| 1181 | assert!( |
| 1182 | out.iter() |
| 1183 | .any(|value| value.get("role").and_then(Value::as_str) == Some("tool")), |
| 1184 | "matching tool result should remain" |
| 1185 | ); |
| 1186 | } |
| 1187 | |
| 1188 | #[test] |
| 1189 | fn reasoning_effort_uses_deepseek_top_level_thinking_parameter() { |
| 1190 | let mut body = json!({}); |
| 1191 | apply_reasoning_effort(&mut body, Some("max"), ApiProvider::Deepseek); |
| 1192 | |
| 1193 | assert_eq!( |
| 1194 | body.get("reasoning_effort").and_then(Value::as_str), |
| 1195 | Some("max") |
| 1196 | ); |
| 1197 | assert_eq!( |
| 1198 | body.pointer("/thinking/type").and_then(Value::as_str), |
| 1199 | Some("enabled") |
| 1200 | ); |
| 1201 | assert!(body.get("extra_body").is_none()); |
| 1202 | } |
| 1203 | |
| 1204 | #[test] |
| 1205 | fn reasoning_effort_off_disables_top_level_thinking() { |
| 1206 | let mut body = json!({}); |
| 1207 | apply_reasoning_effort(&mut body, Some("off"), ApiProvider::Deepseek); |
| 1208 | |
| 1209 | assert_eq!( |
| 1210 | body.pointer("/thinking/type").and_then(Value::as_str), |
| 1211 | Some("disabled") |
| 1212 | ); |
| 1213 | assert!(body.get("reasoning_effort").is_none()); |
| 1214 | assert!(body.get("extra_body").is_none()); |
| 1215 | } |
| 1216 | |
| 1217 | #[test] |
| 1218 | fn reasoning_effort_uses_nvidia_nim_chat_template_kwargs() { |
| 1219 | let mut body = json!({}); |
| 1220 | apply_reasoning_effort(&mut body, Some("max"), ApiProvider::NvidiaNim); |
| 1221 | |
| 1222 | assert_eq!( |
| 1223 | body.pointer("/chat_template_kwargs/thinking") |
| 1224 | .and_then(Value::as_bool), |
| 1225 | Some(true) |
| 1226 | ); |
| 1227 | assert_eq!( |
| 1228 | body.pointer("/chat_template_kwargs/reasoning_effort") |
| 1229 | .and_then(Value::as_str), |
| 1230 | Some("max") |
| 1231 | ); |
| 1232 | assert!(body.get("thinking").is_none()); |
| 1233 | assert!(body.get("reasoning_effort").is_none()); |
| 1234 | } |
| 1235 | |
| 1236 | #[test] |
| 1237 | fn reasoning_effort_off_disables_nvidia_nim_thinking() { |
| 1238 | let mut body = json!({}); |
| 1239 | apply_reasoning_effort(&mut body, Some("off"), ApiProvider::NvidiaNim); |
| 1240 | |
| 1241 | assert_eq!( |
| 1242 | body.pointer("/chat_template_kwargs/thinking") |
| 1243 | .and_then(Value::as_bool), |
| 1244 | Some(false) |
| 1245 | ); |
| 1246 | assert!( |
| 1247 | body.pointer("/chat_template_kwargs/reasoning_effort") |
| 1248 | .is_none() |
| 1249 | ); |
| 1250 | } |
| 1251 | |
| 1252 | #[test] |
| 1253 | fn chat_parser_accepts_nvidia_nim_reasoning_field() -> Result<()> { |
| 1254 | let response = parse_chat_message(&json!({ |
| 1255 | "id": "chatcmpl-test", |
| 1256 | "model": "deepseek-ai/deepseek-v4-pro", |
| 1257 | "choices": [{ |
| 1258 | "message": { |
| 1259 | "role": "assistant", |
| 1260 | "reasoning": "thinking via NIM", |
| 1261 | "content": "final answer" |
| 1262 | }, |
| 1263 | "finish_reason": "stop" |
| 1264 | }], |
| 1265 | "usage": { |
| 1266 | "prompt_tokens": 10, |
| 1267 | "completion_tokens": 3 |
| 1268 | } |
| 1269 | }))?; |
| 1270 | |
| 1271 | assert!(matches!( |
| 1272 | response.content.first(), |
| 1273 | Some(ContentBlock::Thinking { thinking }) if thinking == "thinking via NIM" |
| 1274 | )); |
| 1275 | assert!(matches!( |
| 1276 | response.content.get(1), |
| 1277 | Some(ContentBlock::Text { text, .. }) if text == "final answer" |
| 1278 | )); |
| 1279 | Ok(()) |
| 1280 | } |
| 1281 | |
| 1282 | #[test] |
| 1283 | fn sse_parser_accepts_nvidia_nim_reasoning_delta() { |
| 1284 | let mut content_index = 0; |
| 1285 | let mut text_started = false; |
| 1286 | let mut thinking_started = false; |
| 1287 | let mut tool_indices = std::collections::HashMap::new(); |
| 1288 | let events = parse_sse_chunk( |
| 1289 | &json!({ |
| 1290 | "choices": [{ |
| 1291 | "delta": { |
| 1292 | "reasoning": "nim thought" |
| 1293 | } |
| 1294 | }] |
| 1295 | }), |
| 1296 | &mut content_index, |
| 1297 | &mut text_started, |
| 1298 | &mut thinking_started, |
| 1299 | &mut tool_indices, |
| 1300 | true, |
| 1301 | ); |
| 1302 | |
| 1303 | assert!(events.iter().any(|event| matches!( |
| 1304 | event, |
| 1305 | StreamEvent::ContentBlockDelta { |
| 1306 | delta: Delta::ThinkingDelta { thinking }, |
| 1307 | .. |
| 1308 | } if thinking == "nim thought" |
| 1309 | ))); |
| 1310 | } |
| 1311 | |
| 1312 | #[test] |
| 1313 | fn chat_tool_strict_flag_is_nested_under_function() { |
| 1314 | let tool = Tool { |
| 1315 | tool_type: Some("function".to_string()), |
| 1316 | name: "emit_json".to_string(), |
| 1317 | description: "Emit JSON".to_string(), |
| 1318 | input_schema: json!({"type": "object", "properties": {}}), |
| 1319 | allowed_callers: None, |
| 1320 | defer_loading: None, |
| 1321 | input_examples: None, |
| 1322 | strict: Some(true), |
| 1323 | cache_control: None, |
| 1324 | }; |
| 1325 | let encoded = tool_to_chat(&tool); |
| 1326 | assert_eq!( |
| 1327 | encoded |
| 1328 | .get("function") |
| 1329 | .and_then(|function| function.get("strict")) |
| 1330 | .and_then(Value::as_bool), |
| 1331 | Some(true) |
| 1332 | ); |
| 1333 | assert!(encoded.get("strict").is_none()); |
| 1334 | } |
| 1335 | |
| 1336 | #[test] |
| 1337 | fn chat_messages_drop_thinking_only_assistant_for_non_reasoning_model() { |
| 1338 | let message = Message { |
| 1339 | role: "assistant".to_string(), |
| 1340 | content: vec![ContentBlock::Thinking { |
| 1341 | thinking: "plan".to_string(), |
| 1342 | }], |
| 1343 | }; |
| 1344 | let out = build_chat_messages(None, &[message], "some-non-deepseek-model"); |
| 1345 | assert!( |
| 1346 | !out.iter() |
| 1347 | .any(|value| value.get("role").and_then(Value::as_str) == Some("assistant")), |
| 1348 | "non-reasoning model should drop thinking-only assistant" |
| 1349 | ); |
| 1350 | } |
| 1351 | |
| 1352 | #[test] |
| 1353 | fn parse_sse_chunk_closes_each_tool_block_with_matching_index() { |
| 1354 | let chunk = json!({ |
| 1355 | "choices": [{ |
| 1356 | "delta": { |
| 1357 | "tool_calls": [ |
| 1358 | { |
| 1359 | "index": 0, |
| 1360 | "id": "call_0", |
| 1361 | "function": {"name": "read_file", "arguments": "{\"path\":\"a\"}"} |
| 1362 | }, |
| 1363 | { |
| 1364 | "index": 1, |
| 1365 | "id": "call_1", |
| 1366 | "function": {"name": "read_file", "arguments": "{\"path\":\"b\"}"} |
| 1367 | } |
| 1368 | ] |
| 1369 | }, |
| 1370 | "finish_reason": "tool_calls" |
| 1371 | }] |
| 1372 | }); |
| 1373 | |
| 1374 | let mut content_index = 0; |
| 1375 | let mut text_started = false; |
| 1376 | let mut thinking_started = false; |
| 1377 | let mut tool_indices: std::collections::HashMap<u32, u32> = |
| 1378 | std::collections::HashMap::new(); |
| 1379 | let events = parse_sse_chunk( |
| 1380 | &chunk, |
| 1381 | &mut content_index, |
| 1382 | &mut text_started, |
| 1383 | &mut thinking_started, |
| 1384 | &mut tool_indices, |
| 1385 | false, |
| 1386 | ); |
| 1387 | |
| 1388 | let starts: Vec<u32> = events |
| 1389 | .iter() |
| 1390 | .filter_map(|event| match event { |
| 1391 | StreamEvent::ContentBlockStart { |
| 1392 | index, |
| 1393 | content_block: ContentBlockStart::ToolUse { .. }, |
| 1394 | } => Some(*index), |
| 1395 | _ => None, |
| 1396 | }) |
| 1397 | .collect(); |
| 1398 | let stops: Vec<u32> = events |
| 1399 | .iter() |
| 1400 | .filter_map(|event| match event { |
| 1401 | StreamEvent::ContentBlockStop { index } => Some(*index), |
| 1402 | _ => None, |
| 1403 | }) |
| 1404 | .collect(); |
| 1405 | let deltas: Vec<u32> = events |
| 1406 | .iter() |
| 1407 | .filter_map(|event| match event { |
| 1408 | StreamEvent::ContentBlockDelta { |
| 1409 | index, |
| 1410 | delta: Delta::InputJsonDelta { .. }, |
| 1411 | } => Some(*index), |
| 1412 | _ => None, |
| 1413 | }) |
| 1414 | .collect(); |
| 1415 | |
| 1416 | assert_eq!(starts, vec![0, 1]); |
| 1417 | assert_eq!(stops, vec![0, 1]); |
| 1418 | assert_eq!(deltas, vec![0, 1]); |
| 1419 | } |
| 1420 | |
| 1421 | #[test] |
| 1422 | fn parse_sse_chunk_handles_empty_choices_usage_chunk() { |
| 1423 | let chunk = json!({ |
| 1424 | "choices": [], |
| 1425 | "usage": { |
| 1426 | "prompt_tokens": 100, |
| 1427 | "completion_tokens": 20, |
| 1428 | "prompt_cache_hit_tokens": 70, |
| 1429 | "prompt_cache_miss_tokens": 30 |
| 1430 | } |
| 1431 | }); |
| 1432 | |
| 1433 | let mut content_index = 0; |
| 1434 | let mut text_started = false; |
| 1435 | let mut thinking_started = false; |
| 1436 | let mut tool_indices: std::collections::HashMap<u32, u32> = |
| 1437 | std::collections::HashMap::new(); |
| 1438 | let events = parse_sse_chunk( |
| 1439 | &chunk, |
| 1440 | &mut content_index, |
| 1441 | &mut text_started, |
| 1442 | &mut thinking_started, |
| 1443 | &mut tool_indices, |
| 1444 | false, |
| 1445 | ); |
| 1446 | |
| 1447 | let StreamEvent::MessageDelta { |
| 1448 | usage: Some(usage), .. |
| 1449 | } = &events[0] |
| 1450 | else { |
| 1451 | panic!("expected usage delta"); |
| 1452 | }; |
| 1453 | assert_eq!(usage.input_tokens, 100); |
| 1454 | assert_eq!(usage.prompt_cache_hit_tokens, Some(70)); |
| 1455 | assert_eq!(usage.prompt_cache_miss_tokens, Some(30)); |
| 1456 | } |
| 1457 | |
| 1458 | #[test] |
| 1459 | fn chat_messages_drop_orphan_tool_results() { |
| 1460 | let messages = vec![Message { |
| 1461 | role: "user".to_string(), |
| 1462 | content: vec![ContentBlock::ToolResult { |
| 1463 | tool_use_id: "tool-1".to_string(), |
| 1464 | content: "ok".to_string(), |
| 1465 | is_error: None, |
| 1466 | content_blocks: None, |
| 1467 | }], |
| 1468 | }]; |
| 1469 | |
| 1470 | let out = build_chat_messages(None, &messages, "deepseek-v4-flash"); |
| 1471 | assert!( |
| 1472 | !out.iter() |
| 1473 | .any(|value| { value.get("role").and_then(Value::as_str) == Some("tool") }) |
| 1474 | ); |
| 1475 | } |
| 1476 | |
| 1477 | #[test] |
| 1478 | fn chat_messages_include_tool_results_when_call_present() { |
| 1479 | let messages = vec![ |
| 1480 | Message { |
| 1481 | role: "assistant".to_string(), |
| 1482 | content: vec![ |
| 1483 | ContentBlock::Thinking { |
| 1484 | thinking: "Need to inspect the directory".to_string(), |
| 1485 | }, |
| 1486 | ContentBlock::ToolUse { |
| 1487 | id: "tool-1".to_string(), |
| 1488 | name: "list_dir".to_string(), |
| 1489 | input: json!({}), |
| 1490 | caller: None, |
| 1491 | }, |
| 1492 | ], |
| 1493 | }, |
| 1494 | Message { |
| 1495 | role: "user".to_string(), |
| 1496 | content: vec![ContentBlock::ToolResult { |
| 1497 | tool_use_id: "tool-1".to_string(), |
| 1498 | content: "ok".to_string(), |
| 1499 | is_error: None, |
| 1500 | content_blocks: None, |
| 1501 | }], |
| 1502 | }, |
| 1503 | ]; |
| 1504 | |
| 1505 | let out = build_chat_messages(None, &messages, "deepseek-v4-flash"); |
| 1506 | assert!( |
| 1507 | out.iter() |
| 1508 | .any(|value| { value.get("role").and_then(Value::as_str) == Some("tool") }) |
| 1509 | ); |
| 1510 | let assistant = out |
| 1511 | .iter() |
| 1512 | .find(|value| value.get("role").and_then(Value::as_str) == Some("assistant")) |
| 1513 | .expect("assistant message"); |
| 1514 | assert!(assistant.get("tool_calls").is_some()); |
| 1515 | } |
| 1516 | |
| 1517 | #[test] |
| 1518 | fn chat_messages_encode_tool_call_names() { |
| 1519 | let messages = vec![ |
| 1520 | Message { |
| 1521 | role: "assistant".to_string(), |
| 1522 | content: vec![ |
| 1523 | ContentBlock::Thinking { |
| 1524 | thinking: "Need to search".to_string(), |
| 1525 | }, |
| 1526 | ContentBlock::ToolUse { |
| 1527 | id: "tool-1".to_string(), |
| 1528 | name: "web.run".to_string(), |
| 1529 | input: json!({}), |
| 1530 | caller: None, |
| 1531 | }, |
| 1532 | ], |
| 1533 | }, |
| 1534 | Message { |
| 1535 | role: "user".to_string(), |
| 1536 | content: vec![ContentBlock::ToolResult { |
| 1537 | tool_use_id: "tool-1".to_string(), |
| 1538 | content: "ok".to_string(), |
| 1539 | is_error: None, |
| 1540 | content_blocks: None, |
| 1541 | }], |
| 1542 | }, |
| 1543 | ]; |
| 1544 | |
| 1545 | let out = build_chat_messages(None, &messages, "deepseek-v4-flash"); |
| 1546 | let assistant = out |
| 1547 | .iter() |
| 1548 | .find(|value| value.get("role").and_then(Value::as_str) == Some("assistant")) |
| 1549 | .expect("assistant message"); |
| 1550 | let tool_calls = assistant |
| 1551 | .get("tool_calls") |
| 1552 | .and_then(Value::as_array) |
| 1553 | .expect("tool_calls array"); |
| 1554 | let function_name = tool_calls |
| 1555 | .first() |
| 1556 | .and_then(|call| call.get("function")) |
| 1557 | .and_then(|func| func.get("name")) |
| 1558 | .and_then(Value::as_str) |
| 1559 | .expect("tool call function name"); |
| 1560 | |
| 1561 | assert_eq!(function_name, to_api_tool_name("web.run")); |
| 1562 | } |
| 1563 | |
| 1564 | #[test] |
| 1565 | fn chat_messages_strips_orphaned_tool_calls_after_compaction() { |
| 1566 | // Simulates post-compaction state: assistant has tool_calls but the |
| 1567 | // tool result messages were summarized away. |
| 1568 | let messages = vec![ |
| 1569 | Message { |
| 1570 | role: "assistant".to_string(), |
| 1571 | content: vec![ContentBlock::ToolUse { |
| 1572 | id: "tool-orphan".to_string(), |
| 1573 | name: "read_file".to_string(), |
| 1574 | input: json!({"path": "src/main.rs"}), |
| 1575 | caller: None, |
| 1576 | }], |
| 1577 | }, |
| 1578 | // No tool result follows — it was removed by compaction. |
| 1579 | Message { |
| 1580 | role: "user".to_string(), |
| 1581 | content: vec![ContentBlock::Text { |
| 1582 | text: "continue".to_string(), |
| 1583 | cache_control: None, |
| 1584 | }], |
| 1585 | }, |
| 1586 | ]; |
| 1587 | |
| 1588 | let out = build_chat_messages(None, &messages, "deepseek-v4-flash"); |
| 1589 | let assistant = out |
| 1590 | .iter() |
| 1591 | .find(|value| value.get("role").and_then(Value::as_str) == Some("assistant")); |
| 1592 | // The safety net may drop the assistant message entirely if it only |
| 1593 | // contained orphaned tool_calls and no text content. |
| 1594 | assert!( |
| 1595 | assistant.is_none(), |
| 1596 | "assistant without content/tool_calls should be removed" |
| 1597 | ); |
| 1598 | assert!( |
| 1599 | !out.iter() |
| 1600 | .any(|v| v.get("role").and_then(Value::as_str) == Some("tool")), |
| 1601 | "orphaned tool results should also be removed" |
| 1602 | ); |
| 1603 | } |
| 1604 | |
| 1605 | #[test] |
| 1606 | fn chat_messages_keeps_valid_tool_calls_intact() { |
| 1607 | // Complete call+result pair should NOT be stripped. |
| 1608 | let messages = vec![ |
| 1609 | Message { |
| 1610 | role: "assistant".to_string(), |
| 1611 | content: vec![ |
| 1612 | ContentBlock::Thinking { |
| 1613 | thinking: "Need to list files".to_string(), |
| 1614 | }, |
| 1615 | ContentBlock::ToolUse { |
| 1616 | id: "tool-ok".to_string(), |
| 1617 | name: "list_dir".to_string(), |
| 1618 | input: json!({}), |
| 1619 | caller: None, |
| 1620 | }, |
| 1621 | ], |
| 1622 | }, |
| 1623 | Message { |
| 1624 | role: "user".to_string(), |
| 1625 | content: vec![ContentBlock::ToolResult { |
| 1626 | tool_use_id: "tool-ok".to_string(), |
| 1627 | content: "files".to_string(), |
| 1628 | is_error: None, |
| 1629 | content_blocks: None, |
| 1630 | }], |
| 1631 | }, |
| 1632 | ]; |
| 1633 | |
| 1634 | let out = build_chat_messages(None, &messages, "deepseek-v4-flash"); |
| 1635 | let assistant = out |
| 1636 | .iter() |
| 1637 | .find(|value| value.get("role").and_then(Value::as_str) == Some("assistant")) |
| 1638 | .expect("assistant message"); |
| 1639 | assert!( |
| 1640 | assistant.get("tool_calls").is_some(), |
| 1641 | "valid tool_calls should remain intact" |
| 1642 | ); |
| 1643 | assert!( |
| 1644 | out.iter() |
| 1645 | .any(|value| value.get("role").and_then(Value::as_str) == Some("tool")), |
| 1646 | "tool result should remain" |
| 1647 | ); |
| 1648 | } |
| 1649 | |
| 1650 | #[test] |
| 1651 | fn chat_messages_strips_partial_tool_results() { |
| 1652 | let messages = vec![ |
| 1653 | Message { |
| 1654 | role: "assistant".to_string(), |
| 1655 | content: vec![ |
| 1656 | ContentBlock::ToolUse { |
| 1657 | id: "t1".to_string(), |
| 1658 | name: "read_file".to_string(), |
| 1659 | input: json!({"path": "a.rs"}), |
| 1660 | caller: None, |
| 1661 | }, |
| 1662 | ContentBlock::ToolUse { |
| 1663 | id: "t2".to_string(), |
| 1664 | name: "read_file".to_string(), |
| 1665 | input: json!({"path": "b.rs"}), |
| 1666 | caller: None, |
| 1667 | }, |
| 1668 | ContentBlock::ToolUse { |
| 1669 | id: "t3".to_string(), |
| 1670 | name: "shell".to_string(), |
| 1671 | input: json!({"cmd": "ls"}), |
| 1672 | caller: None, |
| 1673 | }, |
| 1674 | ], |
| 1675 | }, |
| 1676 | Message { |
| 1677 | role: "user".to_string(), |
| 1678 | content: vec![ContentBlock::ToolResult { |
| 1679 | tool_use_id: "t1".to_string(), |
| 1680 | content: "content a".to_string(), |
| 1681 | is_error: None, |
| 1682 | content_blocks: None, |
| 1683 | }], |
| 1684 | }, |
| 1685 | Message { |
| 1686 | role: "user".to_string(), |
| 1687 | content: vec![ContentBlock::ToolResult { |
| 1688 | tool_use_id: "t2".to_string(), |
| 1689 | content: "content b".to_string(), |
| 1690 | is_error: None, |
| 1691 | content_blocks: None, |
| 1692 | }], |
| 1693 | }, |
| 1694 | // No result for t3 |
| 1695 | Message { |
| 1696 | role: "user".to_string(), |
| 1697 | content: vec![ContentBlock::Text { |
| 1698 | text: "continue".to_string(), |
| 1699 | cache_control: None, |
| 1700 | }], |
| 1701 | }, |
| 1702 | ]; |
| 1703 | |
| 1704 | let out = build_chat_messages(None, &messages, "deepseek-v4-flash"); |
| 1705 | let assistant = out |
| 1706 | .iter() |
| 1707 | .find(|v| v.get("role").and_then(Value::as_str) == Some("assistant")); |
| 1708 | assert!( |
| 1709 | assistant.is_none(), |
| 1710 | "assistant with only partial tool_calls should be removed" |
| 1711 | ); |
| 1712 | assert!( |
| 1713 | !out.iter() |
| 1714 | .any(|v| v.get("role").and_then(Value::as_str) == Some("tool")), |
| 1715 | "all orphaned tool results should be removed" |
| 1716 | ); |
| 1717 | } |
| 1718 | |
| 1719 | #[test] |
| 1720 | fn parse_models_response_parses_and_deduplicates() { |
| 1721 | let payload = r#"{ |
| 1722 | "object": "list", |
| 1723 | "data": [ |
| 1724 | {"id": "deepseek-v4-pro", "object": "model", "owned_by": "deepseek", "created": 1}, |
| 1725 | {"id": "deepseek-v4-flash", "object": "model"}, |
| 1726 | {"id": "deepseek-v4-pro", "object": "model", "owned_by": "deepseek", "created": 1} |
| 1727 | ] |
| 1728 | }"#; |
| 1729 | |
| 1730 | let models = parse_models_response(payload).expect("parse models"); |
| 1731 | assert_eq!( |
| 1732 | models, |
| 1733 | vec![ |
| 1734 | AvailableModel { |
| 1735 | id: "deepseek-v4-flash".to_string(), |
| 1736 | owned_by: None, |
| 1737 | created: None |
| 1738 | }, |
| 1739 | AvailableModel { |
| 1740 | id: "deepseek-v4-pro".to_string(), |
| 1741 | owned_by: Some("deepseek".to_string()), |
| 1742 | created: Some(1) |
| 1743 | } |
| 1744 | ] |
| 1745 | ); |
| 1746 | } |
| 1747 | |
| 1748 | #[test] |
| 1749 | fn parse_usage_reads_deepseek_cache_and_reasoning_tokens() { |
| 1750 | let usage = parse_usage(Some(&json!({ |
| 1751 | "prompt_tokens": 100, |
| 1752 | "completion_tokens": 20, |
| 1753 | "prompt_cache_hit_tokens": 70, |
| 1754 | "prompt_cache_miss_tokens": 30, |
| 1755 | "completion_tokens_details": { |
| 1756 | "reasoning_tokens": 12 |
| 1757 | } |
| 1758 | }))); |
| 1759 | |
| 1760 | assert_eq!(usage.input_tokens, 100); |
| 1761 | assert_eq!(usage.output_tokens, 20); |
| 1762 | assert_eq!(usage.prompt_cache_hit_tokens, Some(70)); |
| 1763 | assert_eq!(usage.prompt_cache_miss_tokens, Some(30)); |
| 1764 | assert_eq!(usage.reasoning_tokens, Some(12)); |
| 1765 | } |
| 1766 | |
| 1767 | #[test] |
| 1768 | fn parse_usage_counts_reasoning_tokens_when_completion_tokens_are_zero() { |
| 1769 | let usage = parse_usage(Some(&json!({ |
| 1770 | "prompt_tokens": 100, |
| 1771 | "completion_tokens": 0, |
| 1772 | "completion_tokens_details": { |
| 1773 | "reasoning_tokens": 12 |
| 1774 | } |
| 1775 | }))); |
| 1776 | |
| 1777 | assert_eq!(usage.input_tokens, 100); |
| 1778 | assert_eq!(usage.output_tokens, 12); |
| 1779 | assert_eq!(usage.reasoning_tokens, Some(12)); |
| 1780 | assert!( |
| 1781 | crate::pricing::calculate_turn_cost_from_usage("deepseek-v4-pro", &usage) |
| 1782 | .expect("DeepSeek V4 Pro pricing should apply") |
| 1783 | > 0.0 |
| 1784 | ); |
| 1785 | } |
| 1786 | |
| 1787 | #[test] |
| 1788 | fn parse_usage_reads_v4_prompt_tokens_details_cached_tokens() { |
| 1789 | let usage = parse_usage(Some(&json!({ |
| 1790 | "prompt_tokens": 4000, |
| 1791 | "completion_tokens": 20, |
| 1792 | "prompt_tokens_details": { |
| 1793 | "cached_tokens": 3000 |
| 1794 | } |
| 1795 | }))); |
| 1796 | |
| 1797 | assert_eq!(usage.input_tokens, 4000); |
| 1798 | assert_eq!(usage.output_tokens, 20); |
| 1799 | assert_eq!(usage.prompt_cache_hit_tokens, Some(3000)); |
| 1800 | assert_eq!(usage.prompt_cache_miss_tokens, Some(1000)); |
| 1801 | } |
| 1802 | |
| 1803 | #[test] |
| 1804 | fn sanitize_thinking_mode_counts_reasoning_replay_across_assistant_turns() { |
| 1805 | // Multi-turn body that mimics two prior tool-calling rounds: each |
| 1806 | // assistant message carries its `reasoning_content`. The sanitizer |
| 1807 | // should keep all of them and the count helper should tally bytes |
| 1808 | // across every assistant message. |
| 1809 | let mut body = json!({ |
| 1810 | "model": "deepseek-v4-pro", |
| 1811 | "messages": [ |
| 1812 | { "role": "system", "content": "you are helpful" }, |
| 1813 | { "role": "user", "content": "step 1" }, |
| 1814 | { |
| 1815 | "role": "assistant", |
| 1816 | "content": "", |
| 1817 | "reasoning_content": "I need to call tool A first.", |
| 1818 | "tool_calls": [{ "id": "1", "type": "function" }] |
| 1819 | }, |
| 1820 | { "role": "tool", "tool_call_id": "1", "content": "ok" }, |
| 1821 | { |
| 1822 | "role": "assistant", |
| 1823 | "content": "", |
| 1824 | "reasoning_content": "Now I call tool B.", |
| 1825 | "tool_calls": [{ "id": "2", "type": "function" }] |
| 1826 | }, |
| 1827 | { "role": "tool", "tool_call_id": "2", "content": "ok" }, |
| 1828 | { "role": "user", "content": "step 2" } |
| 1829 | ] |
| 1830 | }); |
| 1831 | |
| 1832 | let approx_tokens = |
| 1833 | sanitize_thinking_mode_messages(&mut body, "deepseek-v4-pro", Some("max")) |
| 1834 | .expect("multi-turn thinking-mode conversation should report replay tokens"); |
| 1835 | // ~4 chars/token; 46 bytes of reasoning -> 11 tokens. |
| 1836 | assert_eq!(approx_tokens, 11); |
| 1837 | |
| 1838 | let chars = count_reasoning_replay_chars(&body); |
| 1839 | // "I need to call tool A first." (28) + "Now I call tool B." (18) = 46 |
| 1840 | assert_eq!(chars, 46); |
| 1841 | |
| 1842 | // No assistant messages should have lost or had their reasoning_content blanked. |
| 1843 | let messages = body["messages"].as_array().unwrap(); |
| 1844 | let assistant_with_reasoning: usize = messages |
| 1845 | .iter() |
| 1846 | .filter(|m| m["role"] == "assistant") |
| 1847 | .filter(|m| { |
| 1848 | m["reasoning_content"] |
| 1849 | .as_str() |
| 1850 | .is_some_and(|s| !s.is_empty()) |
| 1851 | }) |
| 1852 | .count(); |
| 1853 | assert_eq!(assistant_with_reasoning, 2); |
| 1854 | } |
| 1855 | |
| 1856 | /// Issue #30: when no thinking-mode replay applies (non-thinking model or |
| 1857 | /// empty conversation), the sanitizer returns `None` so the footer chip |
| 1858 | /// stays hidden. |
| 1859 | #[test] |
| 1860 | fn sanitize_thinking_mode_returns_none_for_non_thinking_model() { |
| 1861 | let mut body = json!({ |
| 1862 | "model": "deepseek-v4-flash", |
| 1863 | "messages": [ |
| 1864 | { "role": "user", "content": "hi" } |
| 1865 | ] |
| 1866 | }); |
| 1867 | let result = sanitize_thinking_mode_messages(&mut body, "deepseek-v4-flash", None); |
| 1868 | // reasoning_effort is None → no thinking injection, result is None |
| 1869 | assert!(result.is_none()); |
| 1870 | } |
| 1871 | |
| 1872 | #[test] |
| 1873 | fn sanitize_thinking_mode_counts_substituted_placeholder() { |
| 1874 | // An assistant tool-call message is missing reasoning_content; the |
| 1875 | // sanitizer must inject the placeholder, and the count helper must |
| 1876 | // include the placeholder in the total (since it's in the wire |
| 1877 | // payload that ships to DeepSeek). |
| 1878 | let mut body = json!({ |
| 1879 | "model": "deepseek-v4-pro", |
| 1880 | "messages": [ |
| 1881 | { "role": "user", "content": "hi" }, |
| 1882 | { |
| 1883 | "role": "assistant", |
| 1884 | "content": "", |
| 1885 | "tool_calls": [{ "id": "1", "type": "function" }] |
| 1886 | } |
| 1887 | ] |
| 1888 | }); |
| 1889 | |
| 1890 | sanitize_thinking_mode_messages(&mut body, "deepseek-v4-pro", Some("max")); |
| 1891 | |
| 1892 | let chars = count_reasoning_replay_chars(&body); |
| 1893 | // "(reasoning omitted)" is 19 bytes. |
| 1894 | assert_eq!(chars, 19); |
| 1895 | } |
| 1896 | |
| 1897 | #[test] |
| 1898 | fn token_bucket_enforces_delay_when_empty() { |
| 1899 | let now = Instant::now(); |
| 1900 | let mut bucket = TokenBucket { |
| 1901 | enabled: true, |
| 1902 | capacity: 1.0, |
| 1903 | tokens: 1.0, |
| 1904 | refill_per_sec: 2.0, |
| 1905 | last_refill: now, |
| 1906 | }; |
| 1907 | |
| 1908 | assert!(bucket.delay_until_available(1.0).is_none()); |
| 1909 | let delay = bucket |
| 1910 | .delay_until_available(1.0) |
| 1911 | .expect("bucket should require refill delay"); |
| 1912 | assert!( |
| 1913 | delay >= Duration::from_millis(400) && delay <= Duration::from_millis(600), |
| 1914 | "unexpected refill delay: {delay:?}" |
| 1915 | ); |
| 1916 | } |
| 1917 | |
| 1918 | #[test] |
| 1919 | fn stream_buffer_pool_reuses_released_buffers() { |
| 1920 | let mut first = acquire_stream_buffer(); |
| 1921 | first.extend_from_slice(b"hello"); |
| 1922 | let released_capacity = first.capacity(); |
| 1923 | release_stream_buffer(first); |
| 1924 | |
| 1925 | let second = acquire_stream_buffer(); |
| 1926 | assert!(second.is_empty()); |
| 1927 | assert!( |
| 1928 | second.capacity() >= released_capacity, |
| 1929 | "pooled buffer capacity should be reused" |
| 1930 | ); |
| 1931 | } |
| 1932 | |
| 1933 | #[test] |
| 1934 | fn base_url_security_rejects_insecure_non_local_http() { |
| 1935 | let err = validate_base_url_security("http://api.deepseek.com") |
| 1936 | .expect_err("non-local insecure HTTP should be rejected"); |
| 1937 | assert!(err.to_string().contains("Refusing insecure base URL")); |
| 1938 | } |
| 1939 | |
| 1940 | #[test] |
| 1941 | fn base_url_security_allows_localhost_http() { |
| 1942 | assert!(validate_base_url_security("http://localhost:8080").is_ok()); |
| 1943 | assert!(validate_base_url_security("http://127.0.0.1:8080").is_ok()); |
| 1944 | } |
| 1945 | |
| 1946 | #[test] |
| 1947 | fn connection_health_degrades_and_recovers() { |
| 1948 | let now = Instant::now(); |
| 1949 | let mut health = ConnectionHealth::default(); |
| 1950 | assert_eq!(health.state, ConnectionState::Healthy); |
| 1951 | |
| 1952 | apply_request_failure(&mut health, now); |
| 1953 | assert_eq!(health.state, ConnectionState::Healthy); |
| 1954 | |
| 1955 | apply_request_failure(&mut health, now + Duration::from_millis(1)); |
| 1956 | assert_eq!(health.state, ConnectionState::Degraded); |
| 1957 | assert_eq!(health.consecutive_failures, 2); |
| 1958 | |
| 1959 | let recovered = apply_request_success(&mut health, now + Duration::from_secs(1)); |
| 1960 | assert!(recovered); |
| 1961 | assert_eq!(health.state, ConnectionState::Healthy); |
| 1962 | assert_eq!(health.consecutive_failures, 0); |
| 1963 | } |
| 1964 | |
| 1965 | #[test] |
| 1966 | fn recovery_probe_respects_cooldown() { |
| 1967 | let now = Instant::now(); |
| 1968 | let mut health = ConnectionHealth { |
| 1969 | state: ConnectionState::Degraded, |
| 1970 | ..ConnectionHealth::default() |
| 1971 | }; |
| 1972 | |
| 1973 | assert!(mark_recovery_probe_if_due(&mut health, now)); |
| 1974 | assert_eq!(health.state, ConnectionState::Recovering); |
| 1975 | assert!(!mark_recovery_probe_if_due( |
| 1976 | &mut health, |
| 1977 | now + Duration::from_secs(1) |
| 1978 | )); |
| 1979 | assert!(mark_recovery_probe_if_due( |
| 1980 | &mut health, |
| 1981 | now + RECOVERY_PROBE_COOLDOWN + Duration::from_millis(1) |
| 1982 | )); |
| 1983 | } |
| 1984 | |
| 1985 | // === #103 Phase 2: HTTP/1 escape hatch =================================== |
| 1986 | |
| 1987 | /// Serialize tests that mutate `DEEPSEEK_FORCE_HTTP1` so they don't race |
| 1988 | /// against each other — env vars are process-global. |
| 1989 | static FORCE_HTTP1_ENV_LOCK: std::sync::Mutex<()> = std::sync::Mutex::new(()); |
| 1990 | |
| 1991 | struct ForceHttp1EnvGuard { |
| 1992 | prior: Option<std::ffi::OsString>, |
| 1993 | } |
| 1994 | impl ForceHttp1EnvGuard { |
| 1995 | fn capture() -> Self { |
| 1996 | Self { |
| 1997 | prior: std::env::var_os("DEEPSEEK_FORCE_HTTP1"), |
| 1998 | } |
| 1999 | } |
| 2000 | } |
| 2001 | impl Drop for ForceHttp1EnvGuard { |
| 2002 | fn drop(&mut self) { |
| 2003 | // Safety: scoped to test process; reverts to the captured value. |
| 2004 | match &self.prior { |
| 2005 | Some(v) => unsafe { std::env::set_var("DEEPSEEK_FORCE_HTTP1", v) }, |
| 2006 | None => unsafe { std::env::remove_var("DEEPSEEK_FORCE_HTTP1") }, |
| 2007 | } |
| 2008 | } |
| 2009 | } |
| 2010 | |
| 2011 | #[test] |
| 2012 | fn force_http1_unset_is_false() { |
| 2013 | let _lock = FORCE_HTTP1_ENV_LOCK.lock().unwrap(); |
| 2014 | let _guard = ForceHttp1EnvGuard::capture(); |
| 2015 | unsafe { std::env::remove_var("DEEPSEEK_FORCE_HTTP1") }; |
| 2016 | assert!(!force_http1_from_env()); |
| 2017 | } |
| 2018 | |
| 2019 | #[test] |
| 2020 | fn force_http1_truthy_values() { |
| 2021 | let _lock = FORCE_HTTP1_ENV_LOCK.lock().unwrap(); |
| 2022 | let _guard = ForceHttp1EnvGuard::capture(); |
| 2023 | for value in ["1", "true", "True", "YES", "on", " 1 "] { |
| 2024 | // Safety: serialized by FORCE_HTTP1_ENV_LOCK; reverted by guard. |
| 2025 | unsafe { std::env::set_var("DEEPSEEK_FORCE_HTTP1", value) }; |
| 2026 | assert!( |
| 2027 | force_http1_from_env(), |
| 2028 | "{value:?} should be parsed as truthy", |
| 2029 | ); |
| 2030 | } |
| 2031 | } |
| 2032 | |
| 2033 | #[test] |
| 2034 | fn force_http1_falsy_values() { |
| 2035 | let _lock = FORCE_HTTP1_ENV_LOCK.lock().unwrap(); |
| 2036 | let _guard = ForceHttp1EnvGuard::capture(); |
| 2037 | for value in ["0", "false", "no", "off", "", "garbage", "2"] { |
| 2038 | unsafe { std::env::set_var("DEEPSEEK_FORCE_HTTP1", value) }; |
| 2039 | assert!( |
| 2040 | !force_http1_from_env(), |
| 2041 | "{value:?} should NOT be parsed as truthy", |
| 2042 | ); |
| 2043 | } |
| 2044 | } |
| 2045 | } |
| 2046 |