To make a partial download in Delphi, you can use the TIdHTTP component from the Indy library. Here is an example of how to use it:
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uses IdHTTP; var HTTP: TIdHTTP; Stream: TMemoryStream; URL: string; StartPos, EndPos: Int64; begin HTTP := TIdHTTP.Create(nil); try Stream := TMemoryStream.Create; try URL := ‘http://www.example.com/file.zip’; StartPos := 0; EndPos := 1000; // download the first 1000 bytes of the file // Set the HTTP range header HTTP.Request.Range := Format(‘bytes=%d-%d’, [StartPos, EndPos]); // Send the HTTP GET request and save the response to the stream HTTP.Get(URL, Stream); // At this point, the stream contains the partial download of the file // You can now save it to a file, or process it in any other way you like finally Stream.Free; end; finally HTTP.Free; end; end; |
This code will send an HTTP GET request to the specified URL with a range header indicating the desired range of bytes to download. The server will then return only the requested range of the file in the response, which will be saved to the TMemoryStream object.
You can then use the TMemoryStream object to save the partial download to a file, or to process it in any other way you like.
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