how php downloader with resume capability in IDM or like this
thanks
Yes its possible to write a server side php script for downloading files that supports pause and resume functionality from a client side browser.
Usually in php people just do simple file downloading like this; get the flie contents, send some download headers, and dump out the file contents to the browser. Doing it this way does not support client side pause and resume functions.
What you need to do is replicate the way apache handles file downloads using php. You need to write some code that supports byte range requests, then the pause and resume client side features will work.
Actually its pretty simple. PHP doesn’t need to know which packets the client received successfully, only the client needs to know that. If the client detects a failure, it just asks for the byte range again.
@Immerse
The browser should support resumes.
Here is the case: If you download a file with FTP (filezilla), it downloads the entire file again, and it the connection breaks, you need to restart. Downloading from FTP requires a login and is not in public.
Meanwhile, if you download using Free Download Manager (freedownloadmanager.org), it downloads the same file with resume support.
Both the server and downloader should speak about which packet of the file they are to download.
no i will write a php source for downloader whit resume capability
No, there is no source to write, unless you write a plugin for the browser.
There was another thread on this topic not too long ago:
In short, not possible to have a server-side download manager. It’s all client-side.
I disagree. I would assume if the client (eg firefox) gets the same number of bytes it asked for, then it considers it a successful chunk of data, if not, it re-requests the same chunk. Other than that it doesn’t care. That’s why people provide md5 checksums so people can verify their downloads. It has been that way for years, if it was enough of a problem I think it would have been fixed by now.
I believe the original poster wanted to know simply how to make php send resume-able files, and that English may not be their first language, and as such their meaning wasn’t clear. I don’t think it had anything to do with client side scripting at all. Download managers and browsers handle byte requests stuff already, so why would he want to write a client side (which is not possible in php) download client. And even if he did, the server would still need to accept byte requests for pause and resume to work.
Yes I know how it works, I have written php code that accepts byte range request from browsers to download files that can be paused and resumed. I had to so that I could stream audio to my iPhone via a web server.
That’s not a solution. What you’re describing is exactly what the problem is. You need something from the client side back to the server side that the download (or byte range) has or hasn’t been successfully downloaded. Browsers, by themselves, cannot do that. Neither can the server.
Once the server dumps the data down to the client, that’s it–the server has no idea what happens after that. The data has been sent, and that’s all the server cares about. There’s no two-way conversation.
On another note, here’s a good explanation of how the built-in resume download in browsers works:
Basically, the browser requests the file (or a starting point in the requested file), then the server dumps it back to the browser.
I think the big problem is that the browser also has to support resuming. I’m pretty sure that modern browsers can do that, but what about IE? For IE you’d need some sort of plugin to send range headers.
Otherwise, why would Adobe et al spend millions of dollars building plugins to allow resuming of downloads?
Try these. First one downloads with resume support, while second one is bad url request.
http://software-files-l.cnet.com/s/software/11/43/47/62/vlc-1.1.0-win32.exe
Notes for other users: The links might have expired.
Can’t say I’ve noticed a stand-alone resume feature from them. Do you have an example?
It is not a simple task. When you don’t know in php that which packets did the client receive successfully.
It seems to be implemented at some big networks like download.com - the download links they give are resumable and shareable, but they expire after a time. Probably it needs heavy server side coding and close integration with server software.
thank you but it’s do’nt work
please write a source
thank you for secund