52 lines
2.1 KiB
TypeScript
52 lines
2.1 KiB
TypeScript
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/**
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* Anthropic-compatible gateways disagree on Base URL shape:
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* - Claude Code / official host: bare origin (…/host), paths are /v1/messages, /v1/models
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* - @ai-sdk/anthropic: base already includes /v1, then appends /messages, /models
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* - Custom proxies: complete SDK prefix that is not /v1 (e.g. …/anthropic → /anthropic/messages)
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*
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* Netcatty accepts Claude Code bare hosts and AI SDK /v1 bases at chat / probe
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* boundaries. Custom non-/v1 path prefixes are left unchanged so previously
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* working proxy bases keep working.
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*/
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/** Strip trailing slashes; empty input stays empty. */
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export function stripTrailingSlashes(url: string): string {
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return url.trim().replace(/\/+$/, "");
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}
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/** True when the URL path already ends with /v1 (AI SDK style). */
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export function anthropicBaseIncludesV1(baseURL: string): boolean {
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return /\/v1$/i.test(stripTrailingSlashes(baseURL));
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}
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/**
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* True when the Base URL is only a scheme + host (optional port), with no path.
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* Claude Code style ANTHROPIC_BASE_URL values are bare origins.
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*/
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export function isBareOriginBaseURL(baseURL: string): boolean {
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const trimmed = stripTrailingSlashes(baseURL);
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if (!trimmed) return false;
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try {
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const parsed = new URL(trimmed);
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return !parsed.pathname || parsed.pathname === "/";
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} catch {
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// Non-absolute strings: treat as bare only when there is no path segment.
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return !trimmed.includes("/") || /^[a-z][a-z0-9+.-]*:\/\/[^/]+$/i.test(trimmed);
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}
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}
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/**
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* Normalize a stored Anthropic-compat Base URL for @ai-sdk/anthropic.
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* - Bare hosts gain a /v1 suffix (Claude Code style → SDK style).
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* - Bases that already end in /v1 are left unchanged.
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* - Other path prefixes (custom proxies) are left unchanged so chat keeps
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* requesting `{prefix}/messages` rather than `{prefix}/v1/messages`.
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*/
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export function normalizeAnthropicSdkBaseURL(baseURL: string): string {
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const trimmed = stripTrailingSlashes(baseURL);
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if (!trimmed) return trimmed;
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if (anthropicBaseIncludesV1(trimmed)) return trimmed;
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if (!isBareOriginBaseURL(trimmed)) return trimmed;
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return `${trimmed}/v1`;
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}
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