what is *hack*? - Haskell-Cafe - Haskell.org

what is hack?

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Günther Schmidt

13 Jan 2010 13 Jan '10

8:44 a.m.

Hi, References to a Hack. module came in the responses to my posts on HTML-GUIs. What is Hack then? Günther

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John Van Enk

13 Jan 13 Jan

8:46 a.m.

http://hackage.haskell.org/package/hack 2010/1/13 Günther Schmidt

Hi,

References to a Hack. module came in the responses to my posts on HTML-GUIs.

What is Hack then?

Günther

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Günther Schmidt

8:50 a.m.

Hi John, thanks, I should have mentioned that I had found it on hackage, I just don't understand what it *is* or what it's supposed to be for. Günther Am 13.01.10 14:46, schrieb John Van Enk:

http://hackage.haskell.org/package/hack

2010/1/13 Günther Schmidt mailto:gue.schmidt@web.de>

Hi,

References to a Hack. module came in the responses to my posts on HTML-GUIs.

What is Hack then?

Günther

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John Van Enk

8:54 a.m.

This may help more: http://wiki.github.com/nfjinjing/hack The Hack project is based off of a project known as "Rack" for ruby. I'm fairly sure the documentation you can find on Rack will help you understand what Hack does. 2010/1/13 Günther Schmidt

Hi John,

thanks, I should have mentioned that I had found it on hackage, I just don't understand what it *is* or what it's supposed to be for.

Günther

Am 13.01.10 14:46, schrieb John Van Enk:

http://hackage.haskell.org/package/hack

2010/1/13 Günther Schmidt

...
Hi,

References to a Hack. module came in the responses to my posts on HTML-GUIs.

What is Hack then?

Günther

_______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe

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Magnus Therning

9:24 a.m.

2010/1/13 John Van Enk :

This may help more: http://wiki.github.com/nfjinjing/hack

The Hack project is based off of a project known as "Rack" for ruby. I'm fairly sure the documentation you can find on Rack will help you understand what Hack does.

Not knowing what Rack is myself I found this, and assume that's the Ruby project you refer to: http://rack.rubyforge.org/ /M -- Magnus Therning (OpenPGP: 0xAB4DFBA4) magnus＠therning．org Jabber: magnus＠therning．org http://therning.org/magnus identi.ca|twitter: magthe

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Michael Snoyman

9:48 a.m.

Günther, Hack is a layer between a web application and a web server. It allows you to write a web application once and have it communicate with the server in different ways simply by swapping the handler. For example, I have applications that I test on my local system using hack-handler-simpleserver and then deploy onto an Apache server using either hack-handler-cgi or hack-handler-fastcgi. Michael 2010/1/13 Günther Schmidt

Hi John,

thanks, I should have mentioned that I had found it on hackage, I just don't understand what it *is* or what it's supposed to be for.

Günther

Am 13.01.10 14:46, schrieb John Van Enk:

http://hackage.haskell.org/package/hack

2010/1/13 Günther Schmidt

...
Hi,

References to a Hack. module came in the responses to my posts on HTML-GUIs.

What is Hack then?

Günther

_______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe

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Günther Schmidt

10:05 a.m.

Hi Michael, on first impression this seems like a good idea then. Günther Am 13.01.10 15:48, schrieb Michael Snoyman:

Günther,

Hack is a layer between a web application and a web server. It allows you to write a web application once and have it communicate with the server in different ways simply by swapping the handler. For example, I have applications that I test on my local system using hack-handler-simpleserver and then deploy onto an Apache server using either hack-handler-cgi or hack-handler-fastcgi.

Michael

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Pasqualino "Titto" Assini

3:33 p.m.

Hi Michael, what is your experience with hack? Do you have any problem moving your apps from one server/env to another? Regards, titto 2010/1/13 Günther Schmidt :

Hi Michael,

on first impression this seems like a good idea then.

Günther

Am 13.01.10 15:48, schrieb Michael Snoyman:

...
Günther,

Hack is a layer between a web application and a web server. It allows you to write a web application once and have it communicate with the server in different ways simply by swapping the handler. For example, I have applications that I test on my local system using hack-handler-simpleserver and then deploy onto an Apache server using either hack-handler-cgi or hack-handler-fastcgi.

Michael

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-- Pasqualino "Titto" Assini, Ph.D. http://quicquid.org/

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Alberto G. Corona

3:47 p.m.

rack (and hack) permits also to concatenate applications (request handlers) one in top of the other. with interesting combinations (filters, encriptation layers, applications as such). It seems that this is the reason for its name. At first sight it seems too little code to make something useful, but it´s fine. 2010/1/13 Pasqualino "Titto" Assini

Hi Michael,

what is your experience with hack? Do you have any problem moving your apps from one server/env to another?

Regards,

titto

2010/1/13 Günther Schmidt :

...
Hi Michael,

on first impression this seems like a good idea then.

Günther

Am 13.01.10 15:48, schrieb Michael Snoyman:

...
Günther,

Hack is a layer between a web application and a web server. It allows you to write a web application once and have it communicate with the server in different ways simply by swapping the handler. For example, I have applications that I test on my local system using hack-handler-simpleserver and then deploy onto an Apache server using either hack-handler-cgi or hack-handler-fastcgi.

Michael

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-- Pasqualino "Titto" Assini, Ph.D. http://quicquid.org/ _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe

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Michael Snoyman

3:56 p.m.

Titto, I've had no problems with hack. The only things to keep in mind are outside the scope of hack such as: * Persistence. Clearly you need to optimize your application different for CGI run (load up only what you need right now) versus long-running processes like FastCGI (load data only once). * URL schemes. A lot of people assume that your web app with be served from the root of the domain. When using my simpleserver testing, that *is* the case. However, I deploy apps in subdirectories of my domain ( http://www.snoyman.com/photos/, http://www.snoyman.com/wordify/, etc), so I need to keep this in mind. My only two quips about hack itself is: * Versioning scheme. I wish (and have requested) that Hack would follow the Package Versioning Policy so that I could easily check for breaking changes. As is, I simply have to declare the exact version number of Hack I want to work with to guarantee my apps aren't broken in the future. * More serious issue is that it returns the response as a lazy bytestring. It's not really fair to call this a quip, since I fully supported this approach; nonetheless, using an enumerator for this would probably be more efficient for certain use cases. I just a few hours ago sent off an e-mail about bringing into fruition the Web Application Interface for Haskell, which I would envision as Hack with these two quips addressed. Theoretically, it would also allow easy collaboration with Hack. Michael On Wed, Jan 13, 2010 at 10:33 PM, Pasqualino "Titto" Assini < tittoassini@gmail.com> wrote:

Hi Michael,

what is your experience with hack? Do you have any problem moving your apps from one server/env to another?

Regards,

titto

2010/1/13 Günther Schmidt :

...
Hi Michael,

on first impression this seems like a good idea then.

Günther

Am 13.01.10 15:48, schrieb Michael Snoyman:

...
Günther,

Hack is a layer between a web application and a web server. It allows you to write a web application once and have it communicate with the server in different ways simply by swapping the handler. For example, I have applications that I test on my local system using hack-handler-simpleserver and then deploy onto an Apache server using either hack-handler-cgi or hack-handler-fastcgi.

Michael

_______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe

-- Pasqualino "Titto" Assini, Ph.D. http://quicquid.org/ _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe

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participants (6)

Alberto G. Corona
Günther Schmidt
John Van Enk
Magnus Therning
Michael Snoyman
Pasqualino "Titto" Assini