@fiberplane/hono-otel/dist/config/resolvers.js

Hono middleware to forward OpenTelemetry traces to a local instance of @fiberplane/studio

import { ENV_FIBERPLANE_OTEL_ENDPOINT, ENV_FIBERPLANE_OTEL_LOG_LEVEL, ENV_FIBERPLANE_OTEL_TOKEN, ENV_FIBERPLANE_SERVICE_NAME, ENV_FPX_AUTH_TOKEN, ENV_FPX_ENDPOINT, ENV_FPX_LOG_LEVEL, ENV_FPX_SERVICE_NAME, } from "../constants.js";
import { getFromEnv } from "../utils/index.js";
import { isInLocalMode } from "./local-mode.js";
/**
 * Determines the "mode" of the application based on the provided configuration and environment variables.
 * Precendence is given to the user-provided config, then the env vars.
 * The default value is "local" if the otelEndpoint includes "localhost",
 * otherwise it is "production".
 */
export function getMode(otelEndpoint, userConfig, env) {
    if (userConfig?.mode === "local" || userConfig?.mode === "production") {
        return userConfig.mode;
    }
    const isLocalFallback = isLocalEndpoint(otelEndpoint);
    const isLocal = isInLocalMode(env, isLocalFallback);
    return isLocal ? "local" : "production";
}
/**
 * Determines if the provided otel endpoint is a local endpoint
 *
 * @returns `true` if the endpoint is local, `false` otherwise
 */
function isLocalEndpoint(otelEndpoint) {
    if (!otelEndpoint) {
        return false;
    }
    try {
        const url = new URL(otelEndpoint);
        const host = url.hostname.toLowerCase();
        return (host === "localhost" ||
            host === "127.0.0.1" ||
            host === "::1" ||
            host.endsWith(".localhost"));
    }
    catch {
        // If URL parsing fails, fall back to simple string check
        const lowercaseEndpoint = otelEndpoint.toLowerCase();
        return (lowercaseEndpoint.includes("localhost") ||
            lowercaseEndpoint.includes("127.0.0.1") ||
            lowercaseEndpoint.includes("::1"));
    }
}
/**
 * Get the OTLP endpoint from the environment variables.
 */
export function getOtelEndpoint(env) {
    return getFromEnv(env, [
        // FIBERPLANE_OTEL_ENDPOINT takes precedence over FPX_ENDPOINT
        ENV_FIBERPLANE_OTEL_ENDPOINT,
        // FPX_ENDPOINT is the fallback, here for backwards compatibility
        ENV_FPX_ENDPOINT,
    ]);
}
/**
 * Get the bearer token for the OTLP endpoint from the environment variables.
 */
export function getOtelToken(env) {
    return getFromEnv(env, [
        // FIBERPLANE_OTEL_TOKEN takes precedence over FPX_AUTH_TOKEN
        ENV_FIBERPLANE_OTEL_TOKEN,
        // FPX_AUTH_TOKEN is the fallback, here for backwards compatibility
        ENV_FPX_AUTH_TOKEN,
    ]);
}
/**
 * Get the library's log level from the environment variables.
 */
export function getLogLevel(config, env) {
    if ("libraryDebugMode" in config && config.libraryDebugMode) {
        return "debug";
    }
    return getFromEnv(env, [
        // FIBERPLANE_OTEL_LOG_LEVEL takes precedence over FPX_LOG_LEVEL
        ENV_FIBERPLANE_OTEL_LOG_LEVEL,
        // FPX_LOG_LEVEL is the fallback, here for backwards compatibility
        ENV_FPX_LOG_LEVEL,
    ]);
}
export function getServiceName(env, fallback) {
    const serviceName = getFromEnv(env, [
        ENV_FIBERPLANE_SERVICE_NAME,
        ENV_FPX_SERVICE_NAME,
    ]);
    return serviceName ?? fallback;
}