import * as DateTime from "effect/DateTime";import * as Effect from "effect/Effect";import * as FileSystem from "effect/FileSystem";import * as Option from "effect/Option";import * as Schema from "effect/Schema"; import { writeFileStringAtomically } from "./atomicWrite.ts";import type * as ServerConfig from "./config.ts";import { formatHostForUrl, isWildcardHost } from "./startupAccess.ts"; export const PersistedServerRuntimeState = Schema.Struct({ version: Schema.Literal(1), pid: Schema.Int, host: Schema.optional(Schema.String), port: Schema.Int, origin: Schema.String, // Present when the server fronts a dev web server (VITE_DEV_SERVER_URL). // Dev is single-origin: browsers must pair through this URL, not `origin`. devUrl: Schema.optional(Schema.String), startedAt: Schema.String,});export type PersistedServerRuntimeState = typeof PersistedServerRuntimeState.Type; export class ServerRuntimeStateError extends Schema.TaggedError<ServerRuntimeStateError>()( "ServerRuntimeStateError", { operation: Schema.Literals(["persist", "read", "decode", "clear"]), statePath: Schema.String, cause: Schema.Defect(), },) { override get message(): string { return `Failed to ${this.operation} server runtime state at ${this.statePath}.`; }} const decodePersistedServerRuntimeState = Schema.decodeUnknownEffect( Schema.fromJsonString(PersistedServerRuntimeState),); const runtimeOriginForConfig = ( config: Pick<ServerConfig.ServerConfig["Service"], "host">, port: number,): PersistedServerRuntimeState["origin"] => { const hostname = config.host && !isWildcardHost(config.host) ? formatHostForUrl(config.host) : "127.0.0.1"; return `http://${hostname}:${port}`;}; export const makePersistedServerRuntimeState = (input: { readonly config: Pick<ServerConfig.ServerConfig["Service"], "host" | "devUrl">; readonly port: number;}): Effect.Effect<PersistedServerRuntimeState> => Effect.map(DateTime.now, (now) => ({ version: 1, pid: process.pid, ...(input.config.host ? { host: input.config.host } : {}), port: input.port, origin: runtimeOriginForConfig(input.config, input.port), ...(input.config.devUrl ? { devUrl: input.config.devUrl.toString() } : {}), startedAt: DateTime.formatIso(now), })); export const persistServerRuntimeState = (input: { readonly path: string; readonly state: PersistedServerRuntimeState;}) => writeFileStringAtomically({ filePath: input.path, contents: `${JSON.stringify(input.state)}\n`, }).pipe( Effect.mapError( (cause) => new ServerRuntimeStateError({ operation: "persist", statePath: input.path, cause, }), ), ); export const clearPersistedServerRuntimeState = (path: string) => Effect.gen(function* () { const fs = yield* FileSystem.FileSystem; yield* fs.remove(path, { force: true }).pipe( Effect.mapError( (cause) => new ServerRuntimeStateError({ operation: "clear", statePath: path, cause, }), ), Effect.catchTags({ ServerRuntimeStateError: (error) => Effect.logWarning(error.message).pipe( Effect.annotateLogs({ operation: error.operation, statePath: error.statePath, cause: error, }), ), }), ); }); /** * Report whether the pid recorded in a persisted runtime state is still * running. Signal 0 delivers nothing; it only reports whether the pid exists. * EPERM means it exists but belongs to another user, which still counts as * alive. */export const isProcessAlive = (pid: number): boolean => { try { process.kill(pid, 0); return true; } catch (error) { return error instanceof Error && "code" in error && error.code === "EPERM"; }}; export const readPersistedServerRuntimeState = (path: string) => Effect.gen(function* () { const fs = yield* FileSystem.FileSystem; const raw = yield* fs.readFileString(path).pipe( Effect.matchEffect({ onFailure: (cause) => cause.reason._tag === "NotFound" ? Effect.succeed(Option.none<string>()) : Effect.fail( new ServerRuntimeStateError({ operation: "read", statePath: path, cause, }), ), onSuccess: (contents) => Effect.succeed(Option.some(contents)), }), ); if (Option.isNone(raw)) { return Option.none<PersistedServerRuntimeState>(); } const trimmed = raw.value.trim(); if (trimmed.length === 0) { return Option.none<PersistedServerRuntimeState>(); } return yield* decodePersistedServerRuntimeState(trimmed).pipe( Effect.map(Option.some), Effect.mapError( (cause) => new ServerRuntimeStateError({ operation: "decode", statePath: path, cause, }), ), ); }).pipe( Effect.catchTags({ ServerRuntimeStateError: (error) => Effect.logWarning(error.message).pipe( Effect.annotateLogs({ operation: error.operation, statePath: error.statePath, cause: error, }), Effect.as(Option.none<PersistedServerRuntimeState>()), ), }), );
import * as DateTime from "effect/DateTime";
import * as Effect from "effect/Effect";
import * as FileSystem from "effect/FileSystem";
import * as Option from "effect/Option";
import * as Schema from "effect/Schema";
import { writeFileStringAtomically } from "./atomicWrite.ts";
import type * as ServerConfig from "./config.ts";
import { formatHostForUrl, isWildcardHost } from "./startupAccess.ts";
export const PersistedServerRuntimeState = Schema.Struct({
version: Schema.Literal(1),
pid: Schema.Int,
host: Schema.optional(Schema.String),
port: Schema.Int,
origin: Schema.String,
// Present when the server fronts a dev web server (VITE_DEV_SERVER_URL).
// Dev is single-origin: browsers must pair through this URL, not `origin`.
devUrl: Schema.optional(Schema.String),
startedAt: Schema.String,
});
export type PersistedServerRuntimeState = typeof PersistedServerRuntimeState.Type;
export class ServerRuntimeStateError extends Schema.TaggedError<ServerRuntimeStateError>()(
"ServerRuntimeStateError",
{
operation: Schema.Literals(["persist", "read", "decode", "clear"]),
statePath: Schema.String,
cause: Schema.Defect(),
},
) {
override get message(): string {
return `Failed to ${this.operation} server runtime state at ${this.statePath}.`;
}
}
const decodePersistedServerRuntimeState = Schema.decodeUnknownEffect(
Schema.fromJsonString(PersistedServerRuntimeState),
);
const runtimeOriginForConfig = (
config: Pick<ServerConfig.ServerConfig["Service"], "host">,
port: number,
): PersistedServerRuntimeState["origin"] => {
const hostname =
config.host && !isWildcardHost(config.host) ? formatHostForUrl(config.host) : "127.0.0.1";
return `http://${hostname}:${port}`;
};
export const makePersistedServerRuntimeState = (input: {
readonly config: Pick<ServerConfig.ServerConfig["Service"], "host" | "devUrl">;
readonly port: number;
}): Effect.Effect<PersistedServerRuntimeState> =>
Effect.map(DateTime.now, (now) => ({
version: 1,
pid: process.pid,
...(input.config.host ? { host: input.config.host } : {}),
port: input.port,
origin: runtimeOriginForConfig(input.config, input.port),
...(input.config.devUrl ? { devUrl: input.config.devUrl.toString() } : {}),
startedAt: DateTime.formatIso(now),
}));
export const persistServerRuntimeState = (input: {
readonly path: string;
readonly state: PersistedServerRuntimeState;
}) =>
writeFileStringAtomically({
filePath: input.path,
contents: `${JSON.stringify(input.state)}\n`,
}).pipe(
Effect.mapError(
(cause) =>
new ServerRuntimeStateError({
operation: "persist",
statePath: input.path,
cause,
}),
),
);
export const clearPersistedServerRuntimeState = (path: string) =>
Effect.gen(function* () {
const fs = yield* FileSystem.FileSystem;
yield* fs.remove(path, { force: true }).pipe(
Effect.mapError(
(cause) =>
new ServerRuntimeStateError({
operation: "clear",
statePath: path,
cause,
}),
),
Effect.catchTags({
ServerRuntimeStateError: (error) =>
Effect.logWarning(error.message).pipe(
Effect.annotateLogs({
operation: error.operation,
statePath: error.statePath,
cause: error,
}),
),
}),
);
});
/**
* Report whether the pid recorded in a persisted runtime state is still
* running. Signal 0 delivers nothing; it only reports whether the pid exists.
* EPERM means it exists but belongs to another user, which still counts as
* alive.
*/
export const isProcessAlive = (pid: number): boolean => {
try {
process.kill(pid, 0);
return true;
} catch (error) {
return error instanceof Error && "code" in error && error.code === "EPERM";
}
};
export const readPersistedServerRuntimeState = (path: string) =>
Effect.gen(function* () {
const fs = yield* FileSystem.FileSystem;
const raw = yield* fs.readFileString(path).pipe(
Effect.matchEffect({
onFailure: (cause) =>
cause.reason._tag === "NotFound"
? Effect.succeed(Option.none<string>())
: Effect.fail(
new ServerRuntimeStateError({
operation: "read",
statePath: path,
cause,
}),
),
onSuccess: (contents) => Effect.succeed(Option.some(contents)),
}),
);
if (Option.isNone(raw)) {
return Option.none<PersistedServerRuntimeState>();
}
const trimmed = raw.value.trim();
if (trimmed.length === 0) {
return Option.none<PersistedServerRuntimeState>();
}
return yield* decodePersistedServerRuntimeState(trimmed).pipe(
Effect.map(Option.some),
Effect.mapError(
(cause) =>
new ServerRuntimeStateError({
operation: "decode",
statePath: path,
cause,
}),
),
);
}).pipe(
Effect.catchTags({
ServerRuntimeStateError: (error) =>
Effect.logWarning(error.message).pipe(
Effect.annotateLogs({
operation: error.operation,
statePath: error.statePath,
cause: error,
}),
Effect.as(Option.none<PersistedServerRuntimeState>()),
),
}),
);