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import type { IncomingRequestCfProperties } from '@cloudflare/workers-types/experimental';
export async function getCFObject(
runtimeMode: string
): Promise<IncomingRequestCfProperties | void> {
const CF_ENDPOINT = 'https://workers.cloudflare.com/cf.json';
const CF_FALLBACK: IncomingRequestCfProperties = {
asOrganization: '',
asn: 395747,
colo: 'DFW',
city: 'Austin',
region: 'Texas',
regionCode: 'TX',
metroCode: '635',
postalCode: '78701',
country: 'US',
continent: 'NA',
timezone: 'America/Chicago',
latitude: '30.27130',
longitude: '-97.74260',
clientTcpRtt: 0,
httpProtocol: 'HTTP/1.1',
requestPriority: 'weight=192;exclusive=0',
tlsCipher: 'AEAD-AES128-GCM-SHA256',
tlsVersion: 'TLSv1.3',
tlsClientAuth: {
certPresented: '0',
certVerified: 'NONE',
certRevoked: '0',
certIssuerDN: '',
certSubjectDN: '',
certIssuerDNRFC2253: '',
certSubjectDNRFC2253: '',
certIssuerDNLegacy: '',
certSubjectDNLegacy: '',
certSerial: '',
certIssuerSerial: '',
certSKI: '',
certIssuerSKI: '',
certFingerprintSHA1: '',
certFingerprintSHA256: '',
certNotBefore: '',
certNotAfter: '',
},
edgeRequestKeepAliveStatus: 0,
hostMetadata: undefined,
clientTrustScore: 99,
botManagement: {
corporateProxy: false,
verifiedBot: false,
ja3Hash: '25b4882c2bcb50cd6b469ff28c596742',
staticResource: false,
detectionIds: [],
score: 99,
},
};
if (runtimeMode === 'local') {
return CF_FALLBACK;
} else if (runtimeMode === 'remote') {
try {
const res = await fetch(CF_ENDPOINT);
const cfText = await res.text();
const storedCf = JSON.parse(cfText);
return storedCf;
} catch (e: any) {
return CF_FALLBACK;
}
}
}
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