The page I am working on has a javascript function executed to print parts of the page. For some reason, printing in Safari, causes the window to somehow update. I say somehow, because it does not really refresh as in reload the page, but rather it starts the "rendering" of the page from start, i.e. scroll to top, flash animations start from 0, and so forth. The effect is reproduced by this fiddle: http://jsfiddle.net/fYmnB/ Clicking the print button and finishing or cancelling a print in Safari causes the screen to "go white" for a sec, which in my real website manifests itself as something "like" a reload. While running print button with, let's say, Firefox, just opens and closes the print dialogue without affecting the fiddle page in any way. Is there something with my way of calling the browsers print method that causes this, or how can it be explained - and preferably, avoided? P.S.: On my real site the same occurs with Chrome. In the ex
You have to use Range header while requesting.
ReplyDeleteSending Range: bytes=500-999 will download the bytes form 500 to 999;
Note: PHP is not a multi-threaded language. So even you download by multi-part it'll be sequential. Unless you fork multiple process. Though using third-party extensions like curl you can do this through curl_multi_exec
This will be dependent on the server that you are downloading from supporting Range Requests. Read up on Range Requests, and combine this with a multi-threaded cURL, and you'll be able to have more than one download stream working at a time.
ReplyDelete