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Allow user to override fetchEndpoint and fetchFunction per instance #101

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Allow user to override fetchEndpoint and fetchFunction per instance #101

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19 changes: 11 additions & 8 deletions export/httpQuery.ts
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Original file line number Diff line number Diff line change
@@ -1,6 +1,7 @@
import { parse } from '../shims/url';
import { Socket } from '../shims/net';
import { types as defaultTypes } from '.';
import type { NeonConfigGlobalOnly } from './neonConfig';

// @ts-ignore -- this isn't officially exported by pg
import { prepareValue } from 'pg/lib/utils';
Expand Down Expand Up @@ -39,6 +40,8 @@ interface HTTPQueryOptions {
arrayMode?: boolean; // default false
fullResults?: boolean; // default false
fetchOptions?: Record<string, any>;
fetchEndpoint?: NeonConfigGlobalOnly['fetchEndpoint'];
fetchFunction?: NeonConfigGlobalOnly['fetchFunction'];
// these callback options are not currently exported:
types?: typeof defaultTypes;
queryCallback?: (query: ParameterizedQuery) => void;
Expand Down Expand Up @@ -95,17 +98,17 @@ const errorFields = [
'routine',
] as const;

/*
/*
Most config options can be set in 3 places:

* in a call to `neon`,
* in a call to `transaction`,
* in a call to `neon`,
* in a call to `transaction`,
* or in the call to `sql` (i.e. the function returned by `neon`).

The option variables corresponding these levels are prefixed
`neonOpt`, `txnOpt` and `sqlOpt` respectively.

As you would expect, options at lower levels override higher levels.
As you would expect, options at lower levels override higher levels.
That is:

* `sql` options override `transaction` ones,
Expand All @@ -124,10 +127,11 @@ export function neon(
deferrable: neonOptDeferrable,
queryCallback,
resultCallback,
fetchEndpoint,
fetchFunction,
}: HTTPTransactionOptions = {},
) {
// check the connection string

if (!connectionString)
throw new Error(
'No database connection string was provided to `neon()`. Perhaps an environment variable has not been set?',
Expand Down Expand Up @@ -214,8 +218,7 @@ export function neon(
allSqlOpts?: HTTPQueryOptions | HTTPQueryOptions[],
txnOpts?: HTTPTransactionOptions,
) {
const { fetchEndpoint, fetchFunction } = Socket;

fetchEndpoint ??= Socket.fetchEndpoint;
const url =
typeof fetchEndpoint === 'function'
? fetchEndpoint(hostname, port)
Expand Down Expand Up @@ -286,7 +289,7 @@ export function neon(

let response;
try {
response = await (fetchFunction ?? fetch)(url, {
response = await (fetchFunction ?? Socket.fetchFunction ?? fetch)(url, {
method: 'POST',
body: JSON.stringify(bodyData), // TODO: use json-custom-numbers to allow BigInts?
headers,
Expand Down