67271d859e
Mirror the official opencode CLI fingerprint (User-Agent, x-opencode-session, x-opencode-request, x-opencode-project) on free-tier requests so the Console no longer classifies traffic as an unidentified client and rate-limits it with FreeUsageLimitError / HTTP 429. Session id resolves conversation-stable via resolveSessionId (client session to assistant-text hash to connection) to preserve prompt caching, normalized into opencode ses_ format with a generated fallback. When the downstream client is already opencode, its headers are forwarded as-is.
71 lines
2.3 KiB
JavaScript
71 lines
2.3 KiB
JavaScript
import crypto from "crypto";
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import { BaseExecutor } from "./base.js";
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import { PROVIDERS } from "../config/providers.js";
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import { injectReasoningContent } from "../utils/reasoningContentInjector.js";
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import { resolveSessionId } from "../utils/sessionManager.js";
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const OPENCODE_UA = "opencode";
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const MESSAGES_MODELS = new Set();
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function generateRequestId() {
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return `msg_${crypto.randomUUID().replace(/-/g, "")}`;
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}
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function generateSessionId() {
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return `ses_${crypto.randomUUID().replace(/-/g, "")}`;
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}
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// Normalize any resolved id into opencode's ses_ format (stable per-conversation)
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function toOpencodeSession(id) {
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const stripped = String(id || "").replace(/^ses_/, "").replace(/-/g, "");
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return stripped ? `ses_${stripped}` : null;
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}
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function resolveOpencodeSession(body, credentials) {
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return toOpencodeSession(resolveSessionId({
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headers: credentials?.rawHeaders,
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body,
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connectionId: credentials?.connectionId,
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scope: "opencode",
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}));
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}
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export class OpenCodeExecutor extends BaseExecutor {
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constructor() {
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super("opencode", PROVIDERS.opencode);
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this._currentSessionId = null;
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}
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transformRequest(model, body, stream, credentials) {
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this._currentSessionId = resolveOpencodeSession(body, credentials);
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return injectReasoningContent({ provider: this.provider, model, body });
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}
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buildUrl(model) {
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const base = this.config.baseUrl;
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return MESSAGES_MODELS.has(model)
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? `${base}/zen/v1/messages`
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: `${base}/zen/v1/chat/completions`;
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}
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buildHeaders(credentials, stream = true) {
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const raw = credentials?.rawHeaders || {};
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const lower = {};
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for (const [k, v] of Object.entries(raw)) lower[k.toLowerCase()] = v;
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const downstreamUa = lower["user-agent"] || "";
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const isOpencodeDownstream = downstreamUa.toLowerCase().includes("opencode");
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return {
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"Content-Type": "application/json",
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"Authorization": "Bearer public",
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"User-Agent": isOpencodeDownstream ? downstreamUa : OPENCODE_UA,
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"x-opencode-client": lower["x-opencode-client"] || "desktop",
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"x-opencode-session": lower["x-opencode-session"] || this._currentSessionId || generateSessionId(),
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"x-opencode-request": lower["x-opencode-request"] || generateRequestId(),
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"x-opencode-project": lower["x-opencode-project"] || "global",
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"Accept": stream ? "text/event-stream" : "*/*",
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};
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}
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}
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