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import type {
AskResponse,
DocumentResult,
GenerationOptions,
Message,
ModelsResponse,
OllamaModelDefaults,
OllamaPullProgress,
SSEEvent,
StatusResponse,
} from "./types";
const DEFAULT_TIMEOUT_MS = 15_000;
const RETRY_COUNT = 2;
const RETRY_BACKOFF_MS = 500;
export class LilbeeClient {
constructor(private baseUrl: string) {}
private async assertOk(res: Response): Promise<Response> {
if (!res.ok) {
const text = await res.text().catch(() => "");
throw new Error(`Server responded ${res.status}: ${text}`);
}
return res;
}
/**
* Fetch with automatic retry on network errors and a default timeout.
* Does NOT retry on HTTP error responses (4xx/5xx) — only on fetch failures
* (e.g. connection refused, DNS failure, timeout).
* SSE streams should pass `stream: true` to skip the timeout.
*/
async fetchWithRetry(
url: string,
init?: RequestInit,
opts?: { stream?: boolean; signal?: AbortSignal },
): Promise<Response> {
const maxAttempts = RETRY_COUNT + 1;
let lastError: unknown;
for (let attempt = 0; attempt < maxAttempts; attempt++) {
if (attempt > 0) {
await new Promise((r) => setTimeout(r, RETRY_BACKOFF_MS * attempt));
}
try {
const fetchInit = { ...init };
let timer: ReturnType<typeof setTimeout> | undefined;
if (opts?.signal) {
fetchInit.signal = opts.signal;
} else if (!opts?.stream) {
const controller = new AbortController();
fetchInit.signal = controller.signal;
timer = setTimeout(() => controller.abort(), DEFAULT_TIMEOUT_MS);
}
try {
return await this.assertOk(await globalThis.fetch(url, fetchInit));
} finally {
if (timer !== undefined) clearTimeout(timer);
}
} catch (err) {
lastError = err;
if (err instanceof Error && err.message.startsWith("Server responded")) {
throw err;
}
if (err instanceof Error && err.name === "AbortError") {
throw err;
}
}
}
throw lastError;
}
async health(): Promise<{ status: string; version: string }> {
const res = await this.fetchWithRetry(`${this.baseUrl}/api/health`);
return res.json();
}
async status(): Promise<StatusResponse> {
const res = await this.fetchWithRetry(`${this.baseUrl}/api/status`);
return res.json();
}
async search(query: string, topK?: number): Promise<DocumentResult[]> {
const params = new URLSearchParams({ q: query });
if (topK !== undefined) params.set("top_k", String(topK));
const res = await this.fetchWithRetry(`${this.baseUrl}/api/search?${params}`);
return res.json();
}
async ask(question: string, topK?: number): Promise<AskResponse> {
const res = await this.fetchWithRetry(`${this.baseUrl}/api/ask`, {
method: "POST",
headers: JSON_HEADERS,
body: JSON.stringify({ question, top_k: topK ?? 0 }),
});
return res.json();
}
async *askStream(
question: string,
topK?: number,
signal?: AbortSignal,
options?: GenerationOptions,
): AsyncGenerator<SSEEvent> {
const body: Record<string, unknown> = { question, top_k: topK ?? 0 };
if (options && Object.keys(options).length > 0) body.options = options;
const res = await this.fetchWithRetry(
`${this.baseUrl}/api/ask/stream`,
{
method: "POST",
headers: JSON_HEADERS,
body: JSON.stringify(body),
},
{ stream: true, signal },
);
yield* this.parseSSE(res);
}
async chat(question: string, history: Message[], topK?: number): Promise<AskResponse> {
const res = await this.fetchWithRetry(`${this.baseUrl}/api/chat`, {
method: "POST",
headers: JSON_HEADERS,
body: JSON.stringify({ question, history, top_k: topK ?? 0 }),
});
return res.json();
}
async *chatStream(
question: string,
history: Message[],
topK?: number,
signal?: AbortSignal,
options?: GenerationOptions,
): AsyncGenerator<SSEEvent> {
const body: Record<string, unknown> = { question, history, top_k: topK ?? 0 };
if (options && Object.keys(options).length > 0) body.options = options;
const res = await this.fetchWithRetry(
`${this.baseUrl}/api/chat/stream`,
{
method: "POST",
headers: JSON_HEADERS,
body: JSON.stringify(body),
},
{ stream: true, signal },
);
yield* this.parseSSE(res);
}
async *addFiles(
paths: string[],
force = false,
visionModel?: string,
signal?: AbortSignal,
): AsyncGenerator<SSEEvent> {
const body: Record<string, unknown> = { paths, force };
if (visionModel) body.vision_model = visionModel;
const res = await this.fetchWithRetry(
`${this.baseUrl}/api/add`,
{
method: "POST",
headers: JSON_HEADERS,
body: JSON.stringify(body),
},
{ stream: true, signal },
);
yield* this.parseSSE(res);
}
async *syncStream(forceVision = false, signal?: AbortSignal): AsyncGenerator<SSEEvent> {
const res = await this.fetchWithRetry(
`${this.baseUrl}/api/sync`,
{
method: "POST",
headers: JSON_HEADERS,
body: JSON.stringify({ force_vision: forceVision }),
},
{ stream: true, signal },
);
yield* this.parseSSE(res);
}
async listModels(): Promise<ModelsResponse> {
const res = await this.fetchWithRetry(`${this.baseUrl}/api/models`);
return res.json();
}
async *pullModel(model: string): AsyncGenerator<SSEEvent> {
const res = await this.fetchWithRetry(
`${this.baseUrl}/api/models/pull`,
{
method: "POST",
headers: JSON_HEADERS,
body: JSON.stringify({ model }),
},
{ stream: true },
);
yield* this.parseSSE(res);
}
async setChatModel(model: string): Promise<{ model: string }> {
const res = await this.fetchWithRetry(`${this.baseUrl}/api/models/chat`, {
method: "PUT",
headers: JSON_HEADERS,
body: JSON.stringify({ model }),
});
return res.json();
}
async setVisionModel(model: string): Promise<{ model: string }> {
const res = await this.fetchWithRetry(`${this.baseUrl}/api/models/vision`, {
method: "PUT",
headers: JSON_HEADERS,
body: JSON.stringify({ model }),
});
return res.json();
}
private async *parseSSE(response: Response): AsyncGenerator<SSEEvent> {
if (!response.body) {
throw new Error("Response body is null");
}
const reader = response.body.getReader();
const decoder = new TextDecoder();
let buffer = "";
let currentEvent: string = SSE_EVENT.MESSAGE;
while (true) {
const { done, value } = await reader.read();
if (done) break;
buffer += decoder.decode(value, { stream: true });
const lines = buffer.split("\n");
// split() always returns at least one element, so pop() is never undefined
buffer = lines.pop()!;
for (const line of lines) {
if (line.startsWith("event:")) {
currentEvent = (line.startsWith("event: ") ? line.slice(7) : line.slice(6)).trim();
} else if (line.startsWith("data:")) {
const raw = line.startsWith("data: ") ? line.slice(6) : line.slice(5);
try {
yield { event: currentEvent, data: JSON.parse(raw) };
} catch {
yield { event: currentEvent, data: raw };
}
currentEvent = SSE_EVENT.MESSAGE;
}
}
}
}
}
const PARAM_KEY_MAP: Record<string, keyof OllamaModelDefaults> = {
temperature: "temperature",
top_p: "top_p",
top_k: "top_k",
repeat_penalty: "repeat_penalty",
num_ctx: "num_ctx",
seed: "seed",
};
export function parseModelParameters(
parameters: string,
modelInfo: Record<string, unknown>,
): OllamaModelDefaults {
const defaults: OllamaModelDefaults = {};
for (const line of parameters.split("\n")) {
const parts = line.trim().split(/\s+/);
if (parts.length < 2) continue;
const key = PARAM_KEY_MAP[parts[0]];
if (key) {
const num = Number(parts[1]);
if (!isNaN(num)) defaults[key] = num;
}
}
const ctxKey = Object.keys(modelInfo).find((k) => k.endsWith(".context_length"));
if (ctxKey && !defaults.num_ctx) {
const val = Number(modelInfo[ctxKey]);
if (!isNaN(val) && val > 0) defaults.num_ctx = val;
}
return defaults;
}
export class OllamaClient {
constructor(private baseUrl: string) {}
async *pull(model: string, signal?: AbortSignal): AsyncGenerator<OllamaPullProgress> {
const res = await globalThis.fetch(`${this.baseUrl}/api/pull`, {
method: "POST",
headers: JSON_HEADERS,
body: JSON.stringify({ name: model, stream: true }),
signal,
});
if (!res.ok) {
const text = await res.text().catch(() => "");
throw new Error(`Ollama responded ${res.status}: ${text}`);
}
yield* this.parseNDJSON(res);
}
async show(model: string): Promise<OllamaModelDefaults> {
const res = await globalThis.fetch(`${this.baseUrl}/api/show`, {
method: "POST",
headers: JSON_HEADERS,
body: JSON.stringify({ name: model }),
});
if (!res.ok) {
const text = await res.text().catch(() => "");
throw new Error(`Ollama responded ${res.status}: ${text}`);
}
const data = await res.json();
return parseModelParameters(data.parameters ?? "", data.model_info ?? {});
}
async delete(model: string): Promise<void> {
const res = await globalThis.fetch(`${this.baseUrl}/api/delete`, {
method: "DELETE",
headers: JSON_HEADERS,
body: JSON.stringify({ name: model }),
});
if (!res.ok) {
const text = await res.text().catch(() => "");
throw new Error(`Ollama responded ${res.status}: ${text}`);
}
}
private async *parseNDJSON(response: Response): AsyncGenerator<OllamaPullProgress> {
if (!response.body) {
throw new Error("Response body is null");
}
const reader = response.body.getReader();
const decoder = new TextDecoder();
let buffer = "";
while (true) {
const { done, value } = await reader.read();
if (done) break;
buffer += decoder.decode(value, { stream: true });
const lines = buffer.split("\n");
buffer = lines.pop()!;
for (const line of lines) {
const trimmed = line.trim();
if (!trimmed) continue;
try {
yield JSON.parse(trimmed) as OllamaPullProgress;
} catch {
// skip malformed lines
}
}
}
if (buffer.trim()) {
try {
yield JSON.parse(buffer.trim()) as OllamaPullProgress;
} catch {
// skip
}
}
}
}
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