Jeroen Houben wrote:
> Zed A. Shaw wrote:
>
>> On Mon, 12 Mar 2007 13:47:27 +0100
>> Jeroen Houben <[EMAIL PROTECTED]> wrote:
>>
>>
>>> Hi,
>>>
>>> I'm halfway developing a tiny plugin that allows people to scrub flash
>>> video files. I've got my plugin setup to monitor a directory /movies.
>>> Whenever a .flv file is requested within that directory, some stuff
>>> should happen, if not, the request should be processed as usual. I don't
>>> know how to do the latter..
>>>
>> Handlers are put in a chain and you can load them in front or back
>> (default is in back). In your case, you want your handler to either do
>> the processing and then set the response to finished (see HttpResponse
>> docs), or simply ignore the request and let it continue. Then, you'll
>> just register the handler on "/" but give the :in_front => true option.
>>
>> Let me know if you need more than that.
>>
>>
>
> Hi Zed, thanks for your reply.
>
> Okay I understand the theory, but how do I continue? I thought simply
> returning from my process() method would do the trick, but the code
> below doesn't work, it gives a 404 for files that do exists, but are not
> flv. I just want any file that is not .flv to be served normally.
>
> def process(request, response)
>
> # only stream flv files
> if File.extname(request.params['REQUEST_PATH']).downcase == '.flv'
> puts "not a flv, so returning to the next handler on the stack"
> return
> end
>
>
> Here's my config:
>
> uri "/movies",
> :handler => plugin("/handlers/streamert"),
> :in_front => true
>
>
> I'll post the whole init.rb below, just in case.
>
> require 'mongrel'
> require 'gem_plugin'
>
> class Streamert < GemPlugin::Plugin "/handlers"
> include Mongrel::HttpHandlerPlugin
>
> def initialize(options = {})
> @docroot = options[:cwd] + "/" + options[:docroot]
> end
>
> def process(request, response)
>
> # only stream flv files
> if File.extname(request.params['REQUEST_PATH']).downcase == '.flv'
> puts "not a flv, so returning to the next handler on the stack"
> return
> end
>
> filename = @docroot + request.params['REQUEST_PATH']
>
> # check if file exists
> unless File.exists?(filename) && File.readable?(filename)
> response.start(404, true) do |head,out|
> out.write "Could not open file #{request.params['REQUEST_PATH']}\n"
> end
> end
>
> # see if an offset was given
> offset =
> Mongrel::HttpRequest.query_parse(request.params['QUERY_STRING'])['offset'].to_i
> # check for sane offset
> offset = 0 unless (0...File.size(filename)).include? offset
>
> begin
> response.start(200, true) do |head,out|
>
> head['Content-Type'] = 'video/x-flv'
>
> # write flv marker bytes to response stream
> if pos != 0
> out.write "FLV"
> out.write [1].pack("C")
> out.write [1].pack("C")
> out.write [9].pack("N")
> out.write [9].pack("N")
> end
>
> # read and output flv file optionally starting at a given offset
> File.open(filename, "rb") do |f|
> f.seek(offset)
> while (!f.eof) do
> out.write f.read(8092)
> end
> end
> end
> rescue Exception => e
> response.start(500, true) do |head,out|
> out.write "error proceessing #{request.params['REQUEST_PATH']}\n"
> end
> end
>
> end
>
> end
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