// Copyright The OpenTelemetry Authors
// SPDX-License-Identifier: Apache-2.0
import Document, { DocumentContext, Html, Head, Main, NextScript } from 'next/document';
import { ServerStyleSheet } from 'styled-components';
import {context, propagation} from "@opentelemetry/api";
const { ENV_PLATFORM, WEB_OTEL_SERVICE_NAME, PUBLIC_OTEL_EXPORTER_OTLP_TRACES_ENDPOINT, OTEL_COLLECTOR_HOST} = process.env;
export default class MyDocument extends Document<{ envString: string }> {
static async getInitialProps(ctx: DocumentContext) {
const sheet = new ServerStyleSheet();
const originalRenderPage = ctx.renderPage;
try {
ctx.renderPage = () =>
originalRenderPage({
enhanceApp: App => props => sheet.collectStyles(),
});
const initialProps = await Document.getInitialProps(ctx);
const baggage = propagation.getBaggage(context.active());
const isSyntheticRequest = baggage?.getEntry('synthetic_request')?.value === 'true';
const otlpTracesEndpoint = isSyntheticRequest
? `http://${OTEL_COLLECTOR_HOST}:4318/v1/traces`
: PUBLIC_OTEL_EXPORTER_OTLP_TRACES_ENDPOINT;
const envString = `
window.ENV = {
NEXT_PUBLIC_PLATFORM: '${ENV_PLATFORM}',
NEXT_PUBLIC_OTEL_SERVICE_NAME: '${WEB_OTEL_SERVICE_NAME}',
NEXT_PUBLIC_OTEL_EXPORTER_OTLP_TRACES_ENDPOINT: '${otlpTracesEndpoint}',
IS_SYNTHETIC_REQUEST: '${isSyntheticRequest}',
};`;
return {
...initialProps,
styles: [initialProps.styles, sheet.getStyleElement()],
envString,
};
} finally {
sheet.seal();
}
}
render() {
return (
);
}
}