byteserving vs. Adobe plugin (was Re: [Zope] kludge around byteserving problem (2.4))

[Kyler B. Laird]

It took awhile, but I finally discovered that Zope
handles multiple byte ranges with a shortcut that
Adobe's plugin does not seem to like.

If I ask for
	Range: bytes=1-2, 2-3
from Apache, I'll get
	206
	Date: Tue, 24 Jul 2001 23:34:17 GMT
	Server: Apache/1.3.9 (Unix) PHP/3.0.12 FrontPage/4.0.4.3 secured_by_Raven/1.4.1 Last-Modified: Tue, 24 Jul 2001 23:27:06 GMT
	ETag: "57acf-26dfc6-3b5e044a"
	Accept-Ranges: bytes
	Content-Length: 185
	Connection: close
	Content-Type: multipart/byteranges; boundary=3b5e05f9e

	--3b5e05f9e
	Content-type: application/pdf
	Content-range: bytes 1-2/2547654
	 
	PD
	--3b5e05f9e
	Content-type: application/pdf
	Content-range: bytes 2-3/2547654
	  
	DF
	--3b5e05f9e--

If I ask for the same thing from Zope, I get
	206
	Server: Zope/(Zope 2.4.0 (source release, python 2.1, linux2), python 2.1.1, linux2) ZServer/1.1b1
	Date: Tue, 24 Jul 2001 23:39:01 GMT
	Content-Type: application/pdf
	Accept-Ranges: bytes
	Connection: close
	Content-Range: bytes 1-3/2547654
	Last-Modified: Thu, 19 Jul 2001 14:39:42 GMT
	Content-Length: 3

	PDF


Looking over the HTTP/1.1 spec., it's not clear to
me that this is illegal, but it sure does suck to
have it break the PDF plug in.  I'm not sure I can
call this a bug.  Any advice?

I've included my test program below.

--kyler

============================
#!/usr/bin/env python

import httplib
import time
import random

def http_get_range(host, path, range=None):
	h = httplib.HTTP(host)
	h.putrequest('GET', path)
	if range:
		h.putheader('Range', range)
	
	h.endheaders()
	
	(errcode, errmsg, headers) = h.getreply()
	
	print errcode
	print headers
	
	f = h.getfile()
	content = f.read()
	f.close()

	return content

if (1):
	range = 'bytes=2546630-2547653, 2342854-2372853, 2372854-2402853'
	range = 'bytes=2546630-2547653, 2342854-2372853'
	range = 'bytes=1-2, 2-3'

	print '===== Apache ====='
	apache = http_get_range(host='lairds.com', path='/Kyler/tmp/WRRC.pdf', range=range)
	print apache

	print '===== Zope ====='
	zope = http_get_range(host='maverick.ecn.purdue.edu:8080', path='/test/WRRC.pdf', range=range)

	print zope