@fiberplane/hono-otel/dist/utils/attributes/response.js

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

import { SEMATTRS_HTTP_RESPONSE_CONTENT_LENGTH, SEMATTRS_HTTP_SCHEME, } from "@opentelemetry/semantic-conventions";
import { getFpResolvedConfig, getShouldTraceEverything, } from "../../config/index.js";
import { EXTRA_SEMATTRS_HTTP_RESPONSE_STATUS_CODE, FPX_RESPONSE_BODY, } from "../../constants.js";
import { getLogger } from "../../logger.js";
import { tryGetResponseBodyAsText } from "./body.js";
import { getSafeHeaderValue, headersToObject } from "./headers.js";
export async function getResponseAttributes(response, config) {
    const resolvedConfig = config ?? getFpResolvedConfig();
    const shouldTraceEverything = getShouldTraceEverything(resolvedConfig);
    const logger = getLogger(resolvedConfig?.logLevel ?? "debug");
    if (!resolvedConfig) {
        logger.debug("[getResponseAttributes] No config found in otel context, using default values");
    }
    const attributes = {
        [EXTRA_SEMATTRS_HTTP_RESPONSE_STATUS_CODE]: String(response.status),
        [SEMATTRS_HTTP_SCHEME]: response.url.split(":")[0],
    };
    if (shouldTraceEverything) {
        const responseText = await tryGetResponseBodyAsText(response);
        if (responseText) {
            attributes[FPX_RESPONSE_BODY] = responseText;
        }
    }
    const contentLength = response.headers.get("content-length");
    if (contentLength) {
        attributes[SEMATTRS_HTTP_RESPONSE_CONTENT_LENGTH] = contentLength;
    }
    const headers = response.headers;
    const responseHeaders = headersToObject(headers);
    for (const [key, value] of Object.entries(responseHeaders)) {
        attributes[`http.response.header.${key}`] = getSafeHeaderValue(key, value, resolvedConfig);
    }
    return attributes;
}