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11 changes: 10 additions & 1 deletion packages/common/http/src/request.ts
Original file line number Diff line number Diff line change
Expand Up @@ -68,6 +68,15 @@ function isFormData(value: any): value is FormData {
return typeof FormData !== 'undefined' && value instanceof FormData;
}

/**
* Safely assert whether the given value is a URLSearchParams instance.
*
* In some execution environments URLSearchParams is not defined.
*/
function isUrlSearchParams(value: any): value is URLSearchParams {
return typeof URLSearchParams !== 'undefined' && value instanceof URLSearchParams;
}

/**
* An outgoing HTTP request with an optional typed body.
*
Expand Down Expand Up @@ -273,7 +282,7 @@ export class HttpRequest<T> {
// Check whether the body is already in a serialized form. If so,
// it can just be returned directly.
if (isArrayBuffer(this.body) || isBlob(this.body) || isFormData(this.body) ||
typeof this.body === 'string') {
isUrlSearchParams(this.body) || typeof this.body === 'string') {
return this.body;
}
// Check whether the body is an instance of HttpUrlEncodedParams.
Expand Down
4 changes: 4 additions & 0 deletions packages/common/http/test/request_spec.ts
Original file line number Diff line number Diff line change
Expand Up @@ -143,6 +143,10 @@ const TEST_STRING = `I'm a body!`;
const body = new ArrayBuffer(4);
expect(baseReq.clone({body}).serializeBody()).toBe(body);
});
it('passes URLSearchParams through', () => {
const body = new URLSearchParams('foo=1&bar=2');
expect(baseReq.clone({body}).serializeBody()).toBe(body);
});
it('passes strings through', () => {
const body = 'hello world';
expect(baseReq.clone({body}).serializeBody()).toBe(body);
Expand Down