PatchAsync Method

Sends a non-blocking HTTP/3 PATCH request; the reply arrives on OnResponse.

Syntax

procedure PatchAsync(const aURL: string; const aData: string;

  const aContentType: string = 'application/json');

Parameters

Name	Type	Description
`aURL`	`const string`	Absolute URL of the target resource.
`aData`	`const string`	Request body. It is encoded as UTF-8 before being sent.
`aContentType`	`const string`	Value of the `content-type` request header. Defaults to `application/json`.

Return Value

None. The response is delivered on OnResponse.

Remarks

The request runs on a background thread and the method returns immediately. The reply is delivered on OnResponse, and a failure is reported on OnError.

PATCH applies a partial modification to the target resource.

The synchronous counterpart is Patch, which blocks and returns the body directly.

The events fire on the background worker thread that carried out the request, not on the main thread. Synchronise before touching VCL or FMX controls from the handler.

Example



oClient.OnResponse := OnResponseEvent;

oClient.PatchAsync('https://api.example.com/v1/items', '{}');

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