Module: ServerSide::StaticFiles

Included in:
HTTP::Request
Defined in:
lib/serverside/static.rb

Overview

This module provides functionality for serving files and directory listings over HTTP.

Defined Under Namespace

Modules: Const

Constant Summary collapse

@@mime_types = 
Hash.new {|h, k| ServerSide::StaticFiles::Const::TextPlain}
@@static_files = 
{}

Instance Method Summary collapse

Instance Method Details

#serve_dir(dir) ⇒ Object

Serves a directory listing over HTTP in the form of an HTML page.



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# File 'lib/serverside/static.rb', line 80

def serve_dir(dir)
  html = (Const::DirListingStart % [@path, @path]) +
    Dir.entries(dir).inject('') {|m, fn|
      (fn == '.') ? m : m << Const::DirListing % [@path/fn, fn]
    } + Const::DirListingStop
  send_response(200, 'text/html', html)
end

#serve_file(fn) ⇒ Object

Serves a file over HTTP. The file is cached in memory for later retrieval. If the If-None-Match header is included with an ETag, it is checked against the file’s current ETag. If there’s a match, a 304 response is rendered.



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# File 'lib/serverside/static.rb', line 47

def serve_file(fn)
  stat = File.stat(fn)
  etag = (Const::ETagFormat % [stat.mtime.to_i, stat.size, stat.ino]).freeze
  date = stat.mtime.httpdate
  
  etag_match = @headers[Const::IfNoneMatch]
  last_date = @headers[Const::IfModifiedSince]
  
  modified = (!etag_match && !last_date) || 
    (etag_match && (etag != etag_match)) || (last_date && (last_date != date))
  
  if modified
    if @@static_files[fn] && (@@static_files[fn][0] == etag)
      content = @@static_files[fn][1]
    else
      content = IO.read(fn).freeze
      @@static_files[fn] = [etag.freeze, content]
    end
    
    send_response(200, @@mime_types[File.extname(fn)], content, stat.size, {
      Const::ETag => etag, 
      Const::LastModified => date, 
      Const::CacheControl => Const::MaxAge
    })
  else
    @socket << ((@persistent ? Const::NotModifiedPersist : 
      Const::NotModifiedClose) % [Time.now.httpdate, date, etag, stat.size])
  end
rescue => e
  send_response(404, Const::TextPlain, 'Error reading file.')
end

#serve_static(path) ⇒ Object

Serves static files and directory listings.



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# File 'lib/serverside/static.rb', line 95

def serve_static(path)
  if File.file?(path)
    serve_file(path)
  elsif serve_template(path)
    return
  elsif File.directory?(path)
    serve_dir(path)
  else
    send_response(404, 'text', Const::FileNotFound)
  end
rescue => e
  send_response(500, 'text', e.message)
end

#serve_template(fn, b = nil) ⇒ Object 



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# File 'lib/serverside/static.rb', line 88

def serve_template(fn, b = nil)
  if (fn =~ Const::RHTML) || (File.file?(fn = fn + '.rhtml'))
    send_response(200, Const::TextHTML, Template.render(fn, b || binding))
  end
end