Hi (apologies for the xpost, but im not sure where this fits in),
I have recently had a site demostrated to me (a newsgroup binaries archive
site) that allows a user to select multiple files, then download the
selected files combined as one zip. At first i thought this was nothing
special, until it was pointed out that the download commenced immediately,
and some of the many selected files were almost a GB in size. The only
conclusions I can draw from this is that either a) they have a super-fast
zip service working in the background (which i think is unlikely), or b) you
can somehow 'stream' a zip file as it is created - which i think is the more
likely option. I've noticed that none of the zips are compressed and was
wondering if its possible to somehow add a zip header to the response,
followed by binarywrites of the selected files?
If anybody can shed any light (point me in the direction of
articles/components/examples) on how to do this using c#/asp.net I would
really appreciate it.
tia.
Mark Kelly
6  1262 
Try looking at the #ziplib from #develop. It has a "xxxOutputStrea m"s (like
ZipOutputStream ) that will write to a base stream instead of a file. This
way, you can start sending the stream immediately and still add files (or
even parts of files) as the client recieves it. http://www.icsharpcode.net/OpenSourc...b/Default.aspx
"Mark Kelly" <mark.no$pam.ke lly@f$nm.remove meandchange$tos .co.uk> wrote in
message news:uH******** ******@TK2MSFTN GP12.phx.gbl... Hi (apologies for the xpost, but im not sure where this fits in),
I have recently had a site demostrated to me (a newsgroup binaries archive
site) that allows a user to select multiple files, then download the
selected files combined as one zip. At first i thought this was nothing
special, until it was pointed out that the download commenced immediately,
and some of the many selected files were almost a GB in size. The only
conclusions I can draw from this is that either a) they have a super-fast
zip service working in the background (which i think is unlikely), or b)
you can somehow 'stream' a zip file as it is created - which i think is the
more likely option. I've noticed that none of the zips are compressed and was
wondering if its possible to somehow add a zip header to the response,
followed by binarywrites of the selected files?
If anybody can shed any light (point me in the direction of
articles/components/examples) on how to do this using c#/asp.net I would
really appreciate it.
tia.
Mark Kelly
Yes it is possible to create zip files on the fly, the actual implementation
will depend on which zip library you use, since .Net framework doesn't come
with one.
Jerry
"Mark Kelly" <mark.no$pam.ke lly@f$nm.remove meandchange$tos .co.uk> wrote in
message news:uH******** ******@TK2MSFTN GP12.phx.gbl... Hi (apologies for the xpost, but im not sure where this fits in),
I have recently had a site demostrated to me (a newsgroup binaries archive
site) that allows a user to select multiple files, then download the
selected files combined as one zip. At first i thought this was nothing
special, until it was pointed out that the download commenced immediately,
and some of the many selected files were almost a GB in size. The only
conclusions I can draw from this is that either a) they have a super-fast
zip service working in the background (which i think is unlikely), or b)
you can somehow 'stream' a zip file as it is created - which i think is the
more likely option. I've noticed that none of the zips are compressed and was
wondering if its possible to somehow add a zip header to the response,
followed by binarywrites of the selected files?
If anybody can shed any light (point me in the direction of
articles/components/examples) on how to do this using c#/asp.net I would
really appreciate it.
tia.
Mark Kelly
Hi Jerry
I understand that its possible to create zip files on the fly, I'm wondering
how you start sending the zip to the client, before you've finished creating
it!
"Jerry Pisk" <je******@hotma il.com> wrote in message
news:%2******** ********@TK2MSF TNGP11.phx.gbl. .. Yes it is possible to create zip files on the fly, the actual
implementation will depend on which zip library you use, since .Net framework doesn't
come with one.
Jerry
"Mark Kelly" <mark.no$pam.ke lly@f$nm.remove meandchange$tos .co.uk> wrote in
message news:uH******** ******@TK2MSFTN GP12.phx.gbl... Hi (apologies for the xpost, but im not sure where this fits in),
I have recently had a site demostrated to me (a newsgroup binaries
archive site) that allows a user to select multiple files, then download the
selected files combined as one zip. At first i thought this was nothing
special, until it was pointed out that the download commenced
immediately, and some of the many selected files were almost a GB in size. The only
conclusions I can draw from this is that either a) they have a
super-fast zip service working in the background (which i think is unlikely), or b)
you can somehow 'stream' a zip file as it is created - which i think is the
more likely option. I've noticed that none of the zips are compressed and was
wondering if its possible to somehow add a zip header to the response,
followed by binarywrites of the selected files?
If anybody can shed any light (point me in the direction of
articles/components/examples) on how to do this using c#/asp.net I would
really appreciate it.
tia.
Mark Kelly
Mark Kelly wrote: Hi Jerry
I understand that its possible to create zip files on the fly, I'm wondering
how you start sending the zip to the client, before you've finished creating
it!
If you use the SharpZipLib library, you create a ZipOutputStream which
you wrap around an exisiting stream and then write to it using standard
StreamWriter classes.
As you write data to the ZipOutputStream , it's compressed on the fly and
sent to its eventual destination. In this way, you don't even have to
create a local file before sending it to the remote client!
"Jerry Pisk" <je******@hotma il.com> wrote in message
news:%2******** ********@TK2MSF TNGP11.phx.gbl. ..
Yes it is possible to create zip files on the fly, the actual
implementation
will depend on which zip library you use, since .Net framework doesn't
come
with one.
Jerry
"Mark Kelly" <mark.no$pam.ke lly@f$nm.remove meandchange$tos .co.uk> wrote in
message news:uH******** ******@TK2MSFTN GP12.phx.gbl...
Hi (apologies for the xpost, but im not sure where this fits in),
I have recently had a site demostrated to me (a newsgroup binaries
archive
site) that allows a user to select multiple files, then download the
selected files combined as one zip. At first i thought this was nothing
special, until it was pointed out that the download commenced
immediately,
and some of the many selected files were almost a GB in size. The only
conclusion s I can draw from this is that either a) they have a
super-fast
zip service working in the background (which i think is unlikely), or b)
you
can somehow 'stream' a zip file as it is created - which i think is the
more
likely option. I've noticed that none of the zips are compressed and was
wondering if its possible to somehow add a zip header to the response,
followed by binarywrites of the selected files?
If anybody can shed any light (point me in the direction of
articles/components/examples) on how to do this using c#/asp.net I would
really appreciate it.
tia.
Mark Kelly
--
Ed Courtenay
[MCP, MCSD] http://www.edcourtenay.co.uk
Cheers Ed - this is exactly what i was looking for.
"Ed Courtenay" <re************ *************** **@edcourtenay. co.uk> wrote in
message news:uD******** ********@TK2MSF TNGP12.phx.gbl. .. Mark Kelly wrote:
Hi Jerry
I understand that its possible to create zip files on the fly, I'm
wondering how you start sending the zip to the client, before you've finished
creating it!
If you use the SharpZipLib library, you create a ZipOutputStream which
you wrap around an exisiting stream and then write to it using standard
StreamWriter classes.
As you write data to the ZipOutputStream , it's compressed on the fly and
sent to its eventual destination. In this way, you don't even have to
create a local file before sending it to the remote client!
"Jerry Pisk" <je******@hotma il.com> wrote in message
news:%2******** ********@TK2MSF TNGP11.phx.gbl. ..
Yes it is possible to create zip files on the fly, the actual
implementation
will depend on which zip library you use, since .Net framework doesn't
come
with one.
Jerry
"Mark Kelly" <mark.no$pam.ke lly@f$nm.remove meandchange$tos .co.uk> wrote
inmessage news:uH******** ******@TK2MSFTN GP12.phx.gbl...
Hi (apologies for the xpost, but im not sure where this fits in),
I have recently had a site demostrated to me (a newsgroup binaries
archive
site) that allows a user to select multiple files, then download the
selected files combined as one zip. At first i thought this was nothing
special, until it was pointed out that the download commenced
immediately,
and some of the many selected files were almost a GB in size. The only
conclusion s I can draw from this is that either a) they have a
super-fast
zip service working in the background (which i think is unlikely), or
b)
you
can somehow 'stream' a zip file as it is created - which i think is the
more
likely option. I've noticed that none of the zips are compressed and
waswondering if its possible to somehow add a zip header to the response,
followed by binarywrites of the selected files?
If anybody can shed any light (point me in the direction of
articles/components/examples) on how to do this using c#/asp.net I
wouldreally appreciate it.
tia.
Mark Kelly
--
Ed Courtenay
[MCP, MCSD]
http://www.edcourtenay.co.uk
Cheers Philip - This is exactly what i was looking for.
"Philip Rieck" <st***@mckraken .com> wrote in message
news:%2******** ********@TK2MSF TNGP11.phx.gbl. .. Try looking at the #ziplib from #develop. It has a "xxxOutputStrea m"s
(like ZipOutputStream ) that will write to a base stream instead of a file. This
way, you can start sending the stream immediately and still add files (or
even parts of files) as the client recieves it.
http://www.icsharpcode.net/OpenSourc...b/Default.aspx
"Mark Kelly" <mark.no$pam.ke lly@f$nm.remove meandchange$tos .co.uk> wrote in
message news:uH******** ******@TK2MSFTN GP12.phx.gbl... Hi (apologies for the xpost, but im not sure where this fits in),
I have recently had a site demostrated to me (a newsgroup binaries
archive site) that allows a user to select multiple files, then download the
selected files combined as one zip. At first i thought this was nothing
special, until it was pointed out that the download commenced
immediately, and some of the many selected files were almost a GB in size. The only
conclusions I can draw from this is that either a) they have a
super-fast zip service working in the background (which i think is unlikely), or b)
you can somehow 'stream' a zip file as it is created - which i think is the
more likely option. I've noticed that none of the zips are compressed and was
wondering if its possible to somehow add a zip header to the response,
followed by binarywrites of the selected files?
If anybody can shed any light (point me in the direction of
articles/components/examples) on how to do this using c#/asp.net I would
really appreciate it.
tia.
Mark Kelly
This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics | |
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I have recently had a site demostrated to me (a newsgroup binaries archive
site) that allows a user to select multiple files, then download the
selected files combined as one zip. At first i thought this was nothing
special, until it was pointed out that the download commenced immediately,
and some of the many selected files were almost a GB in size. The only
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