@uwdata/mosaic-core/dist/src/connectors/rest.js

Scalable and extensible linked data views.

import { decodeIPC } from '../util/decode-ipc.js';
/**
 * Connect to a DuckDB server over an HTTP REST interface.
 * @param options Connector options.
 * @param options.uri The URI for the DuckDB REST server.
 * @param options.ipc Arrow IPC extraction options.
 * @returns A connector instance.
 */
export function restConnector(options) {
    return new RestConnector(options);
}
export class RestConnector {
    _uri;
    _ipc;
    constructor({ uri = 'http://localhost:3000/', ipc = undefined } = {}) {
        this._uri = uri;
        this._ipc = ipc;
    }
    async query(query) {
        const req = fetch(this._uri, {
            method: 'POST',
            mode: 'cors',
            cache: 'no-cache',
            credentials: 'omit',
            headers: { 'Content-Type': 'application/json' },
            body: JSON.stringify(query)
        });
        const res = await req;
        if (!res.ok) {
            throw new Error(`Query failed with HTTP status ${res.status}: ${await res.text()}`);
        }
        return query.type === 'exec' ? req
            : query.type === 'arrow' ? decodeIPC(await res.arrayBuffer(), this._ipc)
                : res.json();
    }
}
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