So guys, how do I prevent users from downloading audio files on my web app (running springboot in backend) by accessing the s3 url !
I want to make it impossible to download the audio files in my website ! Any suggestions pls ?
I assume you mean that you want to make it impossible to download the audio files, but still allow streaming them for playback.
You can't.
If it can be played, it can be downloaded. Simple as that.
At best, you can sign your S3 URLs so that they expire after a short period of time. This gives you control over who accesses your audio files, and prevents them from showing up in searches, or linked to from other sites. You can also look into Encrypted Media Extensions, but it's not all that useful for audio since audio is trivially digitally captured on the output.
Related
I've searched a lot but couldn't find an example.
I want to use nanorframework as a webserver where I can upload and download e.g. a JSON file from the browser which holds all my settings. Is this possible?
Otherwise if I want to change some settings I have to rebuild the whole solution and uploat it.
Thanks in advance
You can use the Storage libraries to store that Json file. The actual storage can support by flash (using SPIFFs), SD card or USB mass storage device. This depends on the hardware platform that you are using. Check the Storage samples in our samples repo here.
Downloading a file is pretty straightforward you just need to serve the respective HTTP request. Check the HTTP samples in our samples repo here.
Uploading a file it's a matter of handling the POST request and grabbing the data being sent by the client browser.
My question is essentially how can I get around the storage quota limits enforced on a PWA? A little background...
I am hoping to create an offline-ready line-of-business progressive web app that would ideally push about 2GB of images and video resources onto my user's phones or tablets - well beyond the current storage quota for caches and Indexed DB. What I'd like to be able to do is have my users (we all work at the same company) do a 1 time download of a zip file or directory and have the user's store that on their phone/tablet's file system in a well known directory. As the online version of the app treats these files as URL's, the fetch api would seem ideal since I could serve from online if connected or the local serviceworker managed cache if not online. But the qouta limits have me stumped. None of the files are larger than 15MB, but there's no way to know which files are needed before a user goes offline. Can I use something like an HTML input type=file tag to load files into the cache at runtime and then treat them as URL's? Of course I would remove other files to make room. But since these files wouldn't be coming from "the origin" with its secure https address (a PWA requirement I think) , but rather a local file system, I'm not sure this will work. If it is workable, would my users be forced to browse to the files manually?
If its an option, you can have a native Android service to do the caching part to avoid space constraint and then serve the data from native code to PWA using websockets/secure web sockets.
No PWA solution possible for now. File API has limitation as its sand-boxed.
I want to do live webcast of some ceremonies. I can record .flv files using my webcam and ffmpeg software. Now, if I hire a red5 media server from some hosting company so that visitors can download from that website. Now my problem is how can I upload .flv files LIVE ( when video shooting is still in progress )
Please help how to achieve this
I assume by recording them you mean you are saving them to disk and are not streaming the video? If this is the case you simply need to use an upload form or have ftp / scp access to the hosted server. Pick one of the apps installed and place your flv files in the applications "streams" directory. Once the files are in-place you'll need a way to play them back, which will require a player (plenty of free ones out there like jwplayer). Hopefully this is what you were looking for.
Someone told me that some servers configure it that allow streaming of a file.
OR
Is it a file-encoding problem, not a server configuration problem?
Given a link of the video file, how do I check if that person allows streaming (or play only once downloaded) ? Headers?
In order for a file to be streamable, all of the information necessary to initialize the decode and playback engines must be at the beginning of the file. Not all file formats are designed in that way. (for instance, with AVI files usually the index is at the end).
But the server must also be configured to stream. Transferring a file over HTTP or FTP is a different protocol than streaming the file.
So it's both, for streaming to work everything has to be setup correctly, the server and the file must support it. If either one is not set up correctly, then transferring the file usually works. Transferring the file is the conservative or fallback solution.
As long as the encoding format is such that the information in the file is chronological with respect to the video frames, there is no theoretical possible way for a server to allow downloading but not playing. Think about it. If you have the data, and it's playable after downloading, that portion is playable before downloading is complete.
I'm a C programmer and a total newbie to Flash/video/web world. Don't know where/how to start, and so would greatly appreciate your initial help.
Question
If I need to host flash videos off of my website (instead of embedding YouTube links on my webpages),
AND
If I need to provide player API like YouTube's that can be used, say, for supporting chromeless player versions customizable via this custom API of mine...
THEN
What do I need to do essentially...?
Write a custom Flash video player?
If yes, how? I mean, using which Adobe products / tools / SDKs / language(s)?
Is there anything free/opensource available for doing this? Especially, for Linux platform?
Write a new browser (firefox) plugin for users visiting my site?
Not sure how my custom Flash video player will get to the user visiting my site for the first time?
Any books, resources that cover this problem well?
Does the Flash content need to hosted off of a Windows server only?
Currently lost. Thanks in advance,
/SD
Flash has video playback support built-in, so all you need to do is use the Flash authoring environment or Flex to compile a .SWF file that uses the video API, with some buttons to stop and start the stream, volume, seeking, anything else you want your player to do.
Many people have already done this for you, in a way you can easily use from simple HTML. See eg. OSFLV, Flowplayer, JW...
Write a new browser (firefox) plugin for users visiting my site? Does the Flash content need to hosted off of a Windows server only?
Lord no! Flash video would never have taken off if it was just another custom-server+custom-plugin piece of unpleasantness. Though special streaming servers are possible, for the most part it's just an FLV file sitting on a web server.
(FLV is the video format supported by the Flash video playing functions. There are many, many tools you can use to convert other formats to it; I use Avidemux.)
If you are planning to use a "Progressive Download" approach, then your FLV files can be hosted on a Windows or a Linux box. Be aware that:
it is no as efficient as true
streaming.
you may not use it for live events
nor only for stored video files.
it cannot automatically detect the
end user's connection speed.
it is not possible to jump ahead to
another part while it's downloaded.
the video file will be saved on the
end user's computer.
If you are planning to use a "Streaming" approach then you can either buy and use Adobe's solution (Flash Media Server, available on both Windows and Linux box) or sign up for a hosted solution. On this page you will find recommended providers by Adobe. I personally have been using Influxis's hosting with success for a couple of years already.
You can also write your own streaming server but that would be a lot of hard work. If you are interested in that, I would recommend you have a look a Red5 which is an open source Flash Server written in Java.