Re: HttpWebResponse Transfer-Encoding chunked - how to read trailers?

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Hi Jacek,

thanks for you're note. I should be in the "Trailer" field of the
HttpResponseHeader. Did I mension that it's only .Net 2.0 ;)

Hope that helps,
Markus


"Jacek" <shield_infodate@xxxxxxxx> schrieb im Newsbeitrag
news:uVkYydt5FHA.3296@xxxxxxxxxxxxxxxxxxxxxxx
> But its not true since we are talking about internal chunked encoding
> trailer headers which are not part of standard HTTP 1.1 headers. They are
> embedded inside a chunk at its very end. Just check following link to get
> closer idea what I mean about trailer in chunk:
> http://www.w3.org/Protocols/rfc2616/rfc2616-sec3.html#sec3.6 and perhaps
> appendix 19.4.6 of RFC 2616 to see pseudo code for parsing this data.
>
> Simplest example of www pages served with chunked encoding are exotic eBay
> sites i.e. China or India. Unfortunately changing protocol version to HTTP
> 1.0 does not solve problem (chunked is not supported there) since almost
> all servers I work with despite dropping chunked encoding do not set
> Content-Length header anyway.
>
> Cheers
>
>
> U¿ytkownik "Markus Kling" <markus.kling@xxxxxxxxxxxxx> napisa³ w
> wiadomo¶ci news:%23yRNzXs5FHA.3544@xxxxxxxxxxxxxxxxxxxxxxx
>> The information should be contained in the Header object in the field
>> "Trailer". See
>> http://msdn.microsoft.com/library/default.asp?url=/library/en-us/act/htm/actml_ref_href.asp
>> for further details.
>>
>> Markus
>>
>>
>> "Jacek" <shield_infodate@xxxxxxxx> schrieb im Newsbeitrag
>> news:eiye67r5FHA.3432@xxxxxxxxxxxxxxxxxxxxxxx
>>> Hi!
>>>
>>> My app does quite a bit of work downloading large chunks of data from
>>> different web servers. One of problems I face is to provide approximate
>>> progress reports to users showing download progress. While task is
>>> trivial when web servers set Content-Length header in response its
>>> getting to be really hard when server uses chunked encoding. The only
>>> way according to HTTP 1.1 RFC 2616 to get info on total size of the
>>> chunked message is to read optional TRAILER containing entity header
>>> fields (my solution anyway would be optional).
>>>
>>> The problem is that I see no ways to access chunked header or TRAILER in
>>> .NET other than implementing my own HTTP classes on top of Net Sockets
>>> :(
>>>
>>> Any ideas how to get it done easy way ?
>>>
>>> cheers
>>>
>>
>>
>
>


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