@modelcontextprotocol/sdk
Version:
Model Context Protocol implementation for TypeScript
43 lines • 1.64 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.normalizeHeaders = normalizeHeaders;
exports.createFetchWithInit = createFetchWithInit;
/**
* Normalizes HeadersInit to a plain Record<string, string> for manipulation.
* Handles Headers objects, arrays of tuples, and plain objects.
*/
function normalizeHeaders(headers) {
if (!headers)
return {};
if (headers instanceof Headers) {
return Object.fromEntries(headers.entries());
}
if (Array.isArray(headers)) {
return Object.fromEntries(headers);
}
return { ...headers };
}
/**
* Creates a fetch function that includes base RequestInit options.
* This ensures requests inherit settings like credentials, mode, headers, etc. from the base init.
*
* @param baseFetch - The base fetch function to wrap (defaults to global fetch)
* @param baseInit - The base RequestInit to merge with each request
* @returns A wrapped fetch function that merges base options with call-specific options
*/
function createFetchWithInit(baseFetch = fetch, baseInit) {
if (!baseInit) {
return baseFetch;
}
// Return a wrapped fetch that merges base RequestInit with call-specific init
return async (url, init) => {
const mergedInit = {
...baseInit,
...init,
// Headers need special handling - merge instead of replace
headers: init?.headers ? { ...normalizeHeaders(baseInit.headers), ...normalizeHeaders(init.headers) } : baseInit.headers
};
return baseFetch(url, mergedInit);
};
}
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