Because of this compatibility requirement, color standards added a second signal to the basic monochrome signal, which carries the color information. The grafting of the color transmission standards onto existing monochrome systems permitted existing monochrome television receivers predating the changeover to color television to continue to be operated as monochrome television. Each country, faced with local political, technical, and economic issues, adopted a color television standard which was grafted onto an existing monochrome system such as CCIR System M, using gaps in the video spectrum (explained below) to allow color transmission information to fit in the existing channels allotted.

My host headers are ( Content-Disposition is optional, as said above): HTTP/1.1 200 OKĬontent-Disposition: attachment filename='foobar'įor the record, Android 6.x phone also behaves as expected (in addition to Firefox 53 on my Windows 10 x86_64 host), downloading from the URL without a hitch.Analog color television encoding standards by nationĮvery analog television system bar one began as a black-and-white system. This has been the case with a file called random which is filled with 1000 random bytes. I've since tried to add Content-Disposition: attachment and also Content-Disposition: attachment filename='foobar' for good measure, but it still refuses. Today, however, I tried to download on a Safari mobile browser running on iOS 9.3.5 on an iPhone 4S, and that thing just plain refused to download from a valid URL, alerting me with:ĭownload failed. When the service is requested a URL that maps to a file with an unknown extension (there is no MIME sniffing going on), it simply serves content using chunked transfer encoding with the header Content-Type: application/octet-stream, which has been working wonderfully as well - I occasionally host files of all kinds on the server and am able to download these without any interference from the user agent, as I'd expect from application/octet-stream handling. It's been working like a clock for me for serving all kinds of HTML, JavaScript, CSS, and asset content - making up the bulk of my web pages, naturally.

I have a Web server written on top of your standard http module in Node.js.

Iphone unable to download item