# File webrick/httpservlet/filehandler.rb, line 27
def do_GET(req, res)
st = File::stat(@local_path)
mtime = st.mtime
res['etag'] = sprintf("%x-%x-%x", st.ino, st.size, st.mtime.to_i)
if not_modified?(req, res, mtime, res['etag'])
res.body = ''
raise HTTPStatus::NotModified
elsif req['range']
make_partial_content(req, res, @local_path, st.size)
raise HTTPStatus::PartialContent
else
mtype = HTTPUtils::mime_type(@local_path, @config[:MimeTypes])
res['content-type'] = mtype
res['content-length'] = st.size
res['last-modified'] = mtime.httpdate
res.body = open(@local_path, "rb")
end
end
# File webrick/httpservlet/filehandler.rb, line 72
def make_partial_content(req, res, filename, filesize)
mtype = HTTPUtils::mime_type(filename, @config[:MimeTypes])
unless ranges = HTTPUtils::parse_range_header(req['range'])
raise HTTPStatus::BadRequest,
"Unrecognized range-spec: \"#{req['range']}\""
end
open(filename, "rb"){|io|
if ranges.size > 1
time = Time.now
boundary = "#{time.sec}_#{time.usec}_#{Process::pid}"
body = ''
ranges.each{|range|
first, last = prepare_range(range, filesize)
next if first < 0
io.pos = first
content = io.read(last-first+1)
body << "--" << boundary << CRLF
body << "Content-Type: #{mtype}" << CRLF
body << "Content-Range: bytes #{first}-#{last}/#{filesize}" << CRLF
body << CRLF
body << content
body << CRLF
}
raise HTTPStatus::RequestRangeNotSatisfiable if body.empty?
body << "--" << boundary << "--" << CRLF
res["content-type"] = "multipart/byteranges; boundary=#{boundary}"
res.body = body
elsif range = ranges[0]
first, last = prepare_range(range, filesize)
raise HTTPStatus::RequestRangeNotSatisfiable if first < 0
if last == filesize - 1
content = io.dup
content.pos = first
else
io.pos = first
content = io.read(last-first+1)
end
res['content-type'] = mtype
res['content-range'] = "bytes #{first}-#{last}/#{filesize}"
res['content-length'] = last - first + 1
res.body = content
else
raise HTTPStatus::BadRequest
end
}
end
# File webrick/httpservlet/filehandler.rb, line 47
def not_modified?(req, res, mtime, etag)
if ir = req['if-range']
begin
if Time.httpdate(ir) >= mtime
return true
end
rescue
if HTTPUtils::split_header_value(ir).member?(res['etag'])
return true
end
end
end
if (ims = req['if-modified-since']) && Time.parse(ims) >= mtime
return true
end
if (inm = req['if-none-match']) &&
HTTPUtils::split_header_value(inm).member?(res['etag'])
return true
end
return false
end
# File webrick/httpservlet/filehandler.rb, line 119
def prepare_range(range, filesize)
first = range.first < 0 ? filesize + range.first : range.first
return -1, -1 if first < 0 || first >= filesize
last = range.last < 0 ? filesize + range.last : range.last
last = filesize - 1 if last >= filesize
return first, last
end