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Runtime error
Runtime error
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cd8bd0a | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 | import {
AUTHZ_HEADER_AUTH_ID,
AUTHZ_HEADER_AUTH_KIND,
AUTHZ_HEADER_AUTH_LABEL,
AUTHZ_HEADER_AUTH_SCOPES,
AUTHZ_HEADER_ROUTE_CLASS,
} from "./headers";
import type { AuthSubject, RouteClass } from "./types";
export class AuthzAssertionError extends Error {
readonly status: number;
readonly code: string;
constructor(code: string, message: string, status = 500) {
super(message);
this.name = "AuthzAssertionError";
this.code = code;
this.status = status;
}
}
type HeaderSource = Headers | { get(name: string): string | null };
function readHeader(source: HeaderSource, name: string): string | null {
return source.get(name) ?? null;
}
function isHeaderSource(value: unknown): value is HeaderSource {
if (value instanceof Headers) return true;
if (typeof value !== "object" || value === null) return false;
return typeof (value as { get?: unknown }).get === "function";
}
export function readSubjectFromHeaders(headers: HeaderSource): AuthSubject {
const kind = (readHeader(headers, AUTHZ_HEADER_AUTH_KIND) ?? "anonymous") as AuthSubject["kind"];
const id = readHeader(headers, AUTHZ_HEADER_AUTH_ID) ?? "anonymous";
const label = readHeader(headers, AUTHZ_HEADER_AUTH_LABEL) ?? undefined;
const rawScopes = readHeader(headers, AUTHZ_HEADER_AUTH_SCOPES);
const scopes = rawScopes
? rawScopes
.split(",")
.map((s) => s.trim())
.filter(Boolean)
: [];
return { kind, id, label, scopes };
}
export function readRouteClassFromHeaders(headers: HeaderSource): RouteClass | null {
const raw = readHeader(headers, AUTHZ_HEADER_ROUTE_CLASS);
if (raw === "PUBLIC" || raw === "CLIENT_API" || raw === "MANAGEMENT") return raw;
return null;
}
export function assertAuth(
request: Request | { headers: HeaderSource },
expected: RouteClass
): AuthSubject {
const headers = request.headers;
if (!isHeaderSource(headers)) {
throw new AuthzAssertionError("AUTHZ_INVALID_REQUEST", "Request headers are unavailable", 500);
}
const actualClass = readRouteClassFromHeaders(headers);
if (!actualClass) {
throw new AuthzAssertionError(
"AUTHZ_NOT_INITIALIZED",
"Request did not pass through the authz middleware",
500
);
}
if (actualClass !== expected) {
throw new AuthzAssertionError(
"AUTHZ_ROUTE_CLASS_MISMATCH",
`Expected ${expected} but got ${actualClass}`,
500
);
}
const subject = readSubjectFromHeaders(headers);
if (expected !== "PUBLIC" && subject.kind === "anonymous") {
throw new AuthzAssertionError("AUTHZ_UNAUTHENTICATED", "Authentication required", 401);
}
return subject;
}
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