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Adobe Reader: Allow Fast Web View problem

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Adobe Reader: Allow Fast Web View problem - 20.Feb.2008 5:24:05 AM   
zaan

 

Posts: 10
Joined: 18.Nov.2006
Status: offline
Hello all,

I am expiring a problem.

Server State: ISA2006 as proxy-server (single nic)
Rule: HTTP Users from internal to external with content type:  applicatie/pdf , .pdf and several other types  for normal webbrowsing. Rule is open for everyone.

Client: Internet Explorer, Acrobat Reader 8
Acrobat reader Internet setting: "Display PDF in browser" and "Allow fast web view" are selected.

Problem: When a user opens a large (> 200 KB) pdf file in a webpage the first page is displayed in de browserwindow and a error message is display "A network error occured while accessing this document on the internet"

A workaround is to de-select the "Allow fast web view" in Acrobat reader.

Someone any idea?

Greet,
Izaan





Post #: 1
RE: Adobe Reader: Allow Fast Web View problem - 15.Aug.2008 5:13:53 PM   
zaan

 

Posts: 10
Joined: 18.Nov.2006
Status: offline
Workaround.

When I open a pdf document in my browser and acrobat reader is the viewer (fast webview enabled) my client send this request to the server:


GET http://www.autodata.nl/atsmax/nl/ATSMAXHandleiding.pdf HTTP/1.1
Accept: */*
UA-CPU: x86
Accept-Encoding: gzip, deflate
User-Agent: Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1) ; .NET CLR 1.1.4322; InfoPath.1; .NET CLR 2.0.50727; .NET CLR 3.0.04506.648; .NET CLR 3.5.21022)
Host: www.autodata.nl
Proxy-Connection: Keep-Alive
Pragma: no-cache

The server replies


HTTP/1.1 200 OK
Via: 1.1 NETBOXISA-3
Connection: Keep-Alive
Proxy-Connection: Keep-Alive
Content-Length: 1660925
Date: Fri, 15 Aug 2008 20:34:39 GMT
Content-Type: application/pdf
ETag: "98018a-1957fd-369938c0"
Server: Apache
Last-Modified: Mon, 14 Aug 2006 13:24:27 GMT
Accept-Ranges: bytes

Data is transmitted and the first part of the pdf is displayed (fast view).
Then my pdf client start downloading the rest of the pdf in the background. My client send this requests to the server for the remaining parts of the pdf.



GET http://www.autodata.nl/atsmax/nl/ATSMAXHandleiding.pdf HTTP/1.1
Accept: */*
Range: bytes=29277-32867, 7053-29276
UA-CPU: x86
Accept-Encoding: gzip, deflate
User-Agent: Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1) ; .NET CLR 1.1.4322; InfoPath.1; .NET CLR 2.0.50727; .NET CLR 3.0.04506.648; .NET CLR 3.5.21022)
Proxy-Connection: Keep-Alive
Pragma: no-cache

Notice the range field. The server replies with:


HTTP/1.1 206 Partial Content
Via: 1.1 NETBOXISA-3
Connection: Keep-Alive
Proxy-Connection: Keep-Alive
Content-Length: 26035
Date: Fri, 15 Aug 2008 20:34:39 GMT
Content-Type: multipart/byteranges; boundary=454858cf73c657097
ETag: "98018a-1957fd-369938c0"
Server: Apache
Last-Modified: Mon, 14 Aug 2006 13:24:27 GMT
Accept-Ranges: bytes

--454858cf73c657097
Content-type: application/pdf
Content-range: bytes 29277-32867/1660925


Notice the two content-type fields. The first with "multipart/byteranges" and the second with application/pdf. I assume that ISA server (2006+SP1) is only inspecting the first Content-type field in the header, this is the reason that the rule is not handling this connection and the default rule is denying the connection.

When I add the contenttype multipart/byteranges to the selected content types of the rule, the fast viewing feature of adobe reader is working.

For me,  this is an workaround. Who is to blame, Adobe of Microsoft?

Greet,
Izaan

< Message edited by zaan -- 15.Aug.2008 5:31:23 PM >

(in reply to zaan)
Post #: 2

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