June 2010 - web-devel

An idea for Yesod, feedback requested
by Michael Snoyman 30 Jun '10

30 Jun '10

I'm adding some support right now to Yesod (for version 0.4.0) to support some operations at the beginning of each handler. In particular, the onRequest and isAuthorized functions will now both run inside the Handler monad for each request, giving them full access to all data available there. In addition, the defaultLayout and errorHandler functions both live in the Handler monad. I have an idea to add a per-request piece of data which would be application defined. As a motivating example, a common task would be to check if a user is logged in (by checking the user session), and if he/she is logged in, grab some extra data from the database, such as display name. My idea would use type families to store that kind of information inside the Handler. One benefit is encapsulating this database loading code in one location; however, that could easily be accomplished by just writing a function to do it for you, and calling that function from all your handlers. However, there's a much larger benefit: let's say that you want information on the display name in both the applyLayout function and your handler function; currently, you'd need to do two database lookups. Now, you'd just need one. There are two downsides I can see. The first is that this kind of loading code will be performed at each request, even if it's not used. I'm not as worried about that issue, since most of the time it's data that will be used in the applyLayout function, which is called on almost every request. The second issue is a code style issue: since there seems to be no way to declare default type synonym instances, I'd need to add to more required entries into the Yesod typeclass: the type synonym instances, and the loader function. Currently, the only required function in the Yesod typeclass is approot, and I'm particularly worried about adding some lines requiring the usage of type families, as many users are unfamiliar with them. A possible method for mitigating this issue is to include a scaffolding tool with Yesod that will string up a default site. That's probably something I'll end up doing anyway. Appreciate any user feedback! Michael

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Fwd: [web-devel] missing web component needed: server-side page control
by Alberto G. Corona 24 Jun '10

24 Jun '10

I forgot to send this to the list. This answers also some questions about the idea of server page control. I don´t think in to eliminate the option of client code, not at all. but server control is neccesary to ease interactions that MUST use data in the server. In fact, as I suggest here, pottentially, HJScript can be extended to make it run in the server or in the client depending on the requirements, just modifying (i guess) the underlying monad, because it has many of the common functionalities needed. Hi michael, More or less to solve these concrete problems is a requirement. I think neither using comunications using algebraic data types, nor JSON neither HTML downloading of pierces. My idea is just to send javascript sentences from server to client, and then evaluate ( with javascript "eval") them in the client. Details below: 2010/6/22 Michael Snoyman <michael(a)snoyman.com> > I think it would be useful if we spoke in more concrete terms: in > particular, let's figure out some real world problems we want to solve, > instead of designing the perfect technology. I'll start with some simple > problems, feel free to add some of your own: > > 1) Form validation. Here's an example from a project I'm working on now: > disable field B if field A has one of a list of values. We clearly need to > ensure server-side that field B has no value set if the conditions for A are > fulfilled, but we'd like to "gray out" the field client side. > > because I have a copy of the HTML tree in the server( the way to maintain synchronization trough event forwarding to the server is not described here) I can check te value of the field A. If A meets the condition I just send to the browser the HTML DOM sentence "form.B.style.active=Disabled" (This is javascript pseudocode the real sentence look similar, but I don´t care now to check the documentation and look for the details) in the browser the execution of eval("form.B.style.active=Disabled" ) will disable the field. If we develop a XML DOM library that generate javascript strings, then the haskell code in the server would map 1:1 with the javascript code.For the javascript developer will be muchi like developing javascript in the client. In fact the code would share ,much ideas and code with HJScript because HJScript does also generate javascript strings. I think that we can extend HJSCript to make it run either in the server or the client, depending on the choices. HJScript uses HTML DOM. This case does a lot less sense if the control code does not make use of data in the server. For example, if the list of values of a combo box depends on the choice or values in another field in the form. > 2) Ajax loading of pieces of pages. We can obviously make this very simple > ("download some HTML from this URL and stick it in this div") or much more > complex ("serialize this Haskell data structure to JSON, transfer it, parse > it client side and build up the DOM tree"). > > Just forward and eval the string "divName.innerHTML=\"text of th HTML to include\"" 3) Perhaps not what you were thinking about, but easy integration with > Javascript widgets. Here's an example: a photo gallery that has forward-next > buttons. When Javascript is disabled, the server generates a new HTML page > for each request. With Javascript enabled, it uses something like > jquerytools. > > This requires the detection of this condition. At the beginning, if the jscript code deoes not respond, ttoug the Ajax channel, then use HTML navigation. > These are the kinds of problems I was hoping to tackle with widgets. Let me > know if this is not at all what you had in mind. > > Michael > > > On Tue, Jun 22, 2010 at 6:27 PM, Alberto G. Corona <agocorona(a)gmail.com>wrote: > >> I forgot to cc this to the list. sorry >> >> >> ---------- Forwarded message ---------- >> From: Alberto G. Corona <agocorona(a)gmail.com> >> Date: 2010/6/22 >> Subject: Re: [web-devel] missing web component needed: server-side page >> control >> To: Michael Snoyman <michael(a)snoyman.com> >> >> >> Hi Michael, >> Great to know that you are interested!. >> >> Good to know that you are working on widgets. I´m thinking about the same >> idea, but I ephasize the dynamic nature, that is , not only the widgets >> could be populated from haskell data structures, but will use the server >> side control to make them dynamic, so they can interact with haskell server >> code without refreshing the whole page. >> >> I tough on the need of an HTML DOM, because in my view, we need a 1:1 >> mapping between the browser and the server in XML manipulation >> primitives. Because Javascript uses HTML DOM. Much of HTML DOM methods are a >> single call to the corresponding XML DOM in HXT. But some other, like style >> manipulation are different. >> >> My idea is to have in the server a copy of the HTML tree. Any modification >> on the server will be forwarded to the client. For example, the innerHTML >> method should be executed in the server as such: >> >> setInnerHTML element text= >> modify the local XML element with XML DOM >> if does not exist, exception raised >> if success, add "element.innerHTML= text" to the Ajax queue (the >> javascript listener will eval(uate) it in the client >> >> having a local XML tree copy permits not only checking for errors in the >> server but also to query for document properties. referential transparency >> permits to share the unmodified XML branches for many client sessions. But I >> don´t went deep on thinking about it. neither I know the technology used in >> ASPX.NET of JavaServer Faces to do server control. It is really difficult >> to guess it doe to the confusing documentation. I can only guess from the >> functionalities. >> >> Maybe we have to do a research on the best way to communicating client and >> server for server control, the methods to be used etc... >> >> >> >> 2010/6/22 Michael Snoyman <michael(a)snoyman.com> >> >> Sounds interesting. I just released Yesod 0.3.0, and had in mind that >>> 0.4.0 will focus on a concept I was calling widgets. It sounds very similar >>> to what you're talking about here, so I would definitely be interested in >>> collaborating with you. >>> >>> I'm not sure if writing DOM manipulation code ourselves is necessarily >>> the right approach. It might make more sense to simply leverage an existing >>> Javascript library (my personal preference being jQuery). >>> >>> I have to get back to "real work" for the rest of the day, but I'd like >>> to hear any other thoughts you have on the subject. >>> >>> Michael >>> >>> On Tue, Jun 22, 2010 at 2:23 PM, Alberto G. Corona <agocorona(a)gmail.com >>> > wrote: >>> >>>> Hi web haskellers. >>>> A few days ago I mention the need to have server-side page control >>>> available in Haskell. ASP.NET and JavaServer Faces have it. >>>> I would like to collaborate with anyone of you interested. I have not >>>> much time now but this can change in the coming weeks so I want to >>>> know the interest on the subject in advance. I also want to receive >>>> comments to the development plan. >>>> >>>> The main advantages are: >>>> -No Javascript, no Ajax needed when developing dynamic HTML pages >>>> (All code becomes pure haskell in the server!!) >>>> >>>> -No errors in advanced dynamic HTML code: all is statically typed >>>> haskell (someone bets more?) >>>> >>>> -Clear separation of HTML presentation from page control code >>>> >>>> -Extensibility: makes possible to create custom controls, like HTML >>>> tables automatically generated from haskell containers etc >>>> >>>> All this will unleash the full power of haskell in the Web!!! >>>> >>>> It is compatible and orthogonal with page templating and all other web >>>> stuff. I think that it is a two month work. >>>> >>>> basically what we have to do is the following: >>>> >>>> 0 develop a Haskell HTML DOM library. Just 31 objects to manage HTML >>>> trees >>>> See the HTML DOM Objects Reference at >>>> http://www.w3schools.com/jsref/default.asp >>>> I suppose that this is not yet done >>>> Can make use of the XML structure defined in HXT >>>> http://hackage.haskell.org/package/hxt-8.5.2. HXT has namespace >>>> support. This is needed for defining custom attributes and tags (4 >>>> and 5). >>>> >>>> each HTML DOM method will do two basic things: >>>> a) update a copy of the HTML page tree in the SERVER >>>> >>>> b) send trough an Ajax channel the equivalent javascript >>>> method, that will be executed in the web browser >>>> >>>> 3 create a minimum javascript module that: >>>> read Ajax responses and execute them in the web browser, for >>>> the above functionality >>>> listen for events and forward them to the server trough Ajax. >>>> >>>> 4 define additional XML attributes to be interspersed in the HTML >>>> tree for >>>> specifying url' s in the server where the server events will be >>>> forwarded (for 3) >>>> <button server:onclick="http://server/path..."> >>>> >>>> 5 a mechanism for defining custom XML tags for extensibility: with >>>> the name, the parameters and the library code that handle it >>>> example of custom tag inserted in the HTML: <t:table >>>> t:source="#{hasjkelldata} param1=......> >>>> >>>> 6 some templating that read 5 and produces a HTML tree and Haskell >>>> code. >>>> >>>> >>>> So, people, feel free to question anything. This is just the starting >>>> point to put ideas in the table and discuss all of this >>>> _______________________________________________ >>>> web-devel mailing list >>>> web-devel(a)haskell.org >>>> http://www.haskell.org/mailman/listinfo/web-devel >>>> >>> >>> >> >> >> _______________________________________________ >> web-devel mailing list >> web-devel(a)haskell.org >> http://www.haskell.org/mailman/listinfo/web-devel >> >> >

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missing web component needed: server-side page control
by Alberto G. Corona 23 Jun '10

23 Jun '10

Hi web haskellers. A few days ago I mention the need to have server-side page control available in Haskell. ASP.NET and JavaServer Faces have it. I would like to collaborate with anyone of you interested. I have not much time now but this can change in the coming weeks so I want to know the interest on the subject in advance. I also want to receive comments to the development plan. The main advantages are: -No Javascript, no Ajax needed when developing dynamic HTML pages (All code becomes pure haskell in the server!!) -No errors in advanced dynamic HTML code: all is statically typed haskell (someone bets more?) -Clear separation of HTML presentation from page control code -Extensibility: makes possible to create custom controls, like HTML tables automatically generated from haskell containers etc All this will unleash the full power of haskell in the Web!!! It is compatible and orthogonal with page templating and all other web stuff. I think that it is a two month work. basically what we have to do is the following: 0 develop a Haskell HTML DOM library. Just 31 objects to manage HTML trees See the HTML DOM Objects Reference at http://www.w3schools.com/jsref/default.asp I suppose that this is not yet done Can make use of the XML structure defined in HXT http://hackage.haskell.org/package/hxt-8.5.2. HXT has namespace support. This is needed for defining custom attributes and tags (4 and 5). each HTML DOM method will do two basic things: a) update a copy of the HTML page tree in the SERVER b) send trough an Ajax channel the equivalent javascript method, that will be executed in the web browser 3 create a minimum javascript module that: read Ajax responses and execute them in the web browser, for the above functionality listen for events and forward them to the server trough Ajax. 4 define additional XML attributes to be interspersed in the HTML tree for specifying url' s in the server where the server events will be forwarded (for 3) <button server:onclick="http://server/path..."> 5 a mechanism for defining custom XML tags for extensibility: with the name, the parameters and the library code that handle it example of custom tag inserted in the HTML: <t:table t:source="#{hasjkelldata} param1=......> 6 some templating that read 5 and produces a HTML tree and Haskell code. So, people, feel free to question anything. This is just the starting point to put ideas in the table and discuss all of this

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Re: [web-devel] Wiki web programming page(s)
by Michael Snoyman 23 Jun '10

23 Jun '10

OK, I've started working on the new structure, and put it on the "Web" page on the wiki[1]. I've added so far the section on interfaces (Hack and WAI), so there's clearly more to go, but I wanted to see if people like/hate the format before investing a lot of time in it. Michael [1] http://haskell.org/haskellwiki/Web On Mon, Jun 21, 2010 at 6:09 PM, Thomas Hartman < thomashartman1(a)googlemail.com> wrote: > I meant full fledged demo car keys-included, when they are available :) > > Otherwise yes sample code. Something to give the flavor of what is to > come, and also to help the total newbie sense how much community / > momentum there is going (and maybe enchant them a bit). > > Whether on the main page or somewhere quick to pop up, fine, just > wanted to emphasize that this is something I look for first. > > > On Mon, Jun 21, 2010 at 7:53 AM, Michael Snoyman <michael(a)snoyman.com> > wrote: > > Do you mean sample code, or sample full-fledged apps? Either way, I don't > > think it make sense to have it on the main page, but trying to have a > link > > to sample code for each library seems like a very good idea. > > > > On Mon, Jun 21, 2010 at 5:49 PM, Thomas Hartman > > <thomashartman1(a)googlemail.com> wrote: > >> > >> Personally the first thing I look for is a sample app(s), so I would > >> include this prominently in the thinking somehow. > >> > >> On Mon, Jun 21, 2010 at 7:15 AM, Michael Snoyman <michael(a)snoyman.com> > >> wrote: > >> > Inspiration for this e-mail comes from a post on reddit[1]. > >> > I think it's time as a web development community we work together on > the > >> > overall Haskell web brand. We need a well thought out approach to > >> > organizing > >> > the information we have on the Wiki, and some people to be responsible > >> > for > >> > keeping it up to date. At the moment, the main web programming page[2] > >> > is > >> > (in my opinion) horribly disorganized, and presents the wrong > >> > information > >> > first. We also have a number of smaller pages floating around > [3][4][5] > >> > that > >> > in theory could be subsumed into a more general framework. > >> > > >> > The first step I believe is to create a single page that categorizes > all > >> > of > >> > the web projects, gives a brief description, and links to more > >> > information. > >> > One thing this main page should *not* do is give information like how > to > >> > create a static binary[6]. > >> > So here's a start at the categories I think we should put in: > >> > Servers, eg happstack, snap > >> > Interfaces, eg Hack, WAI. Perhaps it should be included in servers? > >> > Templating: HStringTemplate, Hamlet, HSP > >> > HTML combinators: blaze, html, xhtml. Perhaps included in templating? > >> > Storage: HDBC, macid > >> > Controllers: web-routes, UrlDisp > >> > Frameworks: yesod, kibro, turbinado, happstack, snap > >> > Misc: authenticate, openid, clientsession > >> > Let's try to get a single page that contains as much of a high-level > >> > overview as possible. Just imagine if people new to Haskell could go > to > >> > one > >> > page, get up-to-date information and make informed decisions about > their > >> > choice in tools. > >> > Michael > >> > > >> > [1] > http://www.reddit.com/r/haskell/comments/ch4me/first_impressions_serving_st… > >> > > >> > [2] > http://www.haskell.org/haskellwiki/Practical_web_programming_in_Haskell > >> > [3] http://www.haskell.org/haskellwiki/Web > >> > > >> > [4] > http://www.haskell.org/haskellwiki/Applications_and_libraries/Web_programmi… > >> > [5] http://www.haskell.org/haskellwiki/Blog_articles/Web > >> > [6] > >> > _______________________________________________ > >> > web-devel mailing list > >> > web-devel(a)haskell.org > >> > http://www.haskell.org/mailman/listinfo/web-devel > >> > > >> > > >> > >> > >> > >> -- > >> Need somewhere to put your code? http://patch-tag.com > >> Want to build a webapp? http://happstack.com > > > > > > _______________________________________________ > > web-devel mailing list > > web-devel(a)haskell.org > > http://www.haskell.org/mailman/listinfo/web-devel > > > > > > > > -- > Need somewhere to put your code? http://patch-tag.com > Want to build a webapp? http://happstack.com >

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Fwd: [web-devel] missing web component needed: server-side page control
by Alberto G. Corona 22 Jun '10

22 Jun '10

I forgot to cc this to the list. sorry ---------- Forwarded message ---------- From: Alberto G. Corona <agocorona(a)gmail.com> Date: 2010/6/22 Subject: Re: [web-devel] missing web component needed: server-side page control To: Michael Snoyman <michael(a)snoyman.com> Hi Michael, Great to know that you are interested!. Good to know that you are working on widgets. I´m thinking about the same idea, but I ephasize the dynamic nature, that is , not only the widgets could be populated from haskell data structures, but will use the server side control to make them dynamic, so they can interact with haskell server code without refreshing the whole page. I tough on the need of an HTML DOM, because in my view, we need a 1:1 mapping between the browser and the server in XML manipulation primitives. Because Javascript uses HTML DOM. Much of HTML DOM methods are a single call to the corresponding XML DOM in HXT. But some other, like style manipulation are different. My idea is to have in the server a copy of the HTML tree. Any modification on the server will be forwarded to the client. For example, the innerHTML method should be executed in the server as such: setInnerHTML element text= modify the local XML element with XML DOM if does not exist, exception raised if success, add "element.innerHTML= text" to the Ajax queue (the javascript listener will eval(uate) it in the client having a local XML tree copy permits not only checking for errors in the server but also to query for document properties. referential transparency permits to share the unmodified XML branches for many client sessions. But I don´t went deep on thinking about it. neither I know the technology used in ASPX.NET of JavaServer Faces to do server control. It is really difficult to guess it doe to the confusing documentation. I can only guess from the functionalities. Maybe we have to do a research on the best way to communicating client and server for server control, the methods to be used etc... 2010/6/22 Michael Snoyman <michael(a)snoyman.com> Sounds interesting. I just released Yesod 0.3.0, and had in mind that 0.4.0 > will focus on a concept I was calling widgets. It sounds very similar to > what you're talking about here, so I would definitely be interested in > collaborating with you. > > I'm not sure if writing DOM manipulation code ourselves is necessarily the > right approach. It might make more sense to simply leverage an existing > Javascript library (my personal preference being jQuery). > > I have to get back to "real work" for the rest of the day, but I'd like to > hear any other thoughts you have on the subject. > > Michael > > On Tue, Jun 22, 2010 at 2:23 PM, Alberto G. Corona <agocorona(a)gmail.com>wrote: > >> Hi web haskellers. >> A few days ago I mention the need to have server-side page control >> available in Haskell. ASP.NET and JavaServer Faces have it. >> I would like to collaborate with anyone of you interested. I have not >> much time now but this can change in the coming weeks so I want to >> know the interest on the subject in advance. I also want to receive >> comments to the development plan. >> >> The main advantages are: >> -No Javascript, no Ajax needed when developing dynamic HTML pages >> (All code becomes pure haskell in the server!!) >> >> -No errors in advanced dynamic HTML code: all is statically typed >> haskell (someone bets more?) >> >> -Clear separation of HTML presentation from page control code >> >> -Extensibility: makes possible to create custom controls, like HTML >> tables automatically generated from haskell containers etc >> >> All this will unleash the full power of haskell in the Web!!! >> >> It is compatible and orthogonal with page templating and all other web >> stuff. I think that it is a two month work. >> >> basically what we have to do is the following: >> >> 0 develop a Haskell HTML DOM library. Just 31 objects to manage HTML >> trees >> See the HTML DOM Objects Reference at >> http://www.w3schools.com/jsref/default.asp >> I suppose that this is not yet done >> Can make use of the XML structure defined in HXT >> http://hackage.haskell.org/package/hxt-8.5.2. HXT has namespace >> support. This is needed for defining custom attributes and tags (4 >> and 5). >> >> each HTML DOM method will do two basic things: >> a) update a copy of the HTML page tree in the SERVER >> >> b) send trough an Ajax channel the equivalent javascript >> method, that will be executed in the web browser >> >> 3 create a minimum javascript module that: >> read Ajax responses and execute them in the web browser, for >> the above functionality >> listen for events and forward them to the server trough Ajax. >> >> 4 define additional XML attributes to be interspersed in the HTML tree >> for >> specifying url' s in the server where the server events will be >> forwarded (for 3) >> <button server:onclick="http://server/path..."> >> >> 5 a mechanism for defining custom XML tags for extensibility: with >> the name, the parameters and the library code that handle it >> example of custom tag inserted in the HTML: <t:table >> t:source="#{hasjkelldata} param1=......> >> >> 6 some templating that read 5 and produces a HTML tree and Haskell code. >> >> >> So, people, feel free to question anything. This is just the starting >> point to put ideas in the table and discuss all of this >> _______________________________________________ >> web-devel mailing list >> web-devel(a)haskell.org >> http://www.haskell.org/mailman/listinfo/web-devel >> > >

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Re: [web-devel] Wiki web programming page(s)
by Michael Snoyman 21 Jun '10

21 Jun '10

Do you mean sample code, or sample full-fledged apps? Either way, I don't think it make sense to have it on the main page, but trying to have a link to sample code for each library seems like a very good idea. On Mon, Jun 21, 2010 at 5:49 PM, Thomas Hartman < thomashartman1(a)googlemail.com> wrote: > Personally the first thing I look for is a sample app(s), so I would > include this prominently in the thinking somehow. > > On Mon, Jun 21, 2010 at 7:15 AM, Michael Snoyman <michael(a)snoyman.com> > wrote: > > Inspiration for this e-mail comes from a post on reddit[1]. > > I think it's time as a web development community we work together on the > > overall Haskell web brand. We need a well thought out approach to > organizing > > the information we have on the Wiki, and some people to be responsible > for > > keeping it up to date. At the moment, the main web programming page[2] is > > (in my opinion) horribly disorganized, and presents the wrong information > > first. We also have a number of smaller pages floating around [3][4][5] > that > > in theory could be subsumed into a more general framework. > > > > The first step I believe is to create a single page that categorizes all > of > > the web projects, gives a brief description, and links to more > information. > > One thing this main page should *not* do is give information like how to > > create a static binary[6]. > > So here's a start at the categories I think we should put in: > > Servers, eg happstack, snap > > Interfaces, eg Hack, WAI. Perhaps it should be included in servers? > > Templating: HStringTemplate, Hamlet, HSP > > HTML combinators: blaze, html, xhtml. Perhaps included in templating? > > Storage: HDBC, macid > > Controllers: web-routes, UrlDisp > > Frameworks: yesod, kibro, turbinado, happstack, snap > > Misc: authenticate, openid, clientsession > > Let's try to get a single page that contains as much of a high-level > > overview as possible. Just imagine if people new to Haskell could go to > one > > page, get up-to-date information and make informed decisions about their > > choice in tools. > > Michael > > [1] > http://www.reddit.com/r/haskell/comments/ch4me/first_impressions_serving_st… > > [2] > http://www.haskell.org/haskellwiki/Practical_web_programming_in_Haskell > > [3] http://www.haskell.org/haskellwiki/Web > > [4] > http://www.haskell.org/haskellwiki/Applications_and_libraries/Web_programmi… > > [5] http://www.haskell.org/haskellwiki/Blog_articles/Web > > [6] > > _______________________________________________ > > web-devel mailing list > > web-devel(a)haskell.org > > http://www.haskell.org/mailman/listinfo/web-devel > > > > > > > > -- > Need somewhere to put your code? http://patch-tag.com > Want to build a webapp? http://happstack.com >

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Wiki web programming page(s)
by Michael Snoyman 21 Jun '10

21 Jun '10

Inspiration for this e-mail comes from a post on reddit[1]. I think it's time as a web development community we work together on the overall Haskell web brand. We need a well thought out approach to organizing the information we have on the Wiki, and some people to be responsible for keeping it up to date. At the moment, the main web programming page[2] is (in my opinion) horribly disorganized, and presents the wrong information first. We also have a number of smaller pages floating around [3][4][5] that in theory could be subsumed into a more general framework. The first step I believe is to create a single page that categorizes all of the web projects, gives a brief description, and links to more information. One thing this main page should *not* do is give information like how to create a static binary[6]. So here's a start at the categories I think we should put in: Servers, eg happstack, snap Interfaces, eg Hack, WAI. Perhaps it should be included in servers? Templating: HStringTemplate, Hamlet, HSP HTML combinators: blaze, html, xhtml. Perhaps included in templating? Storage: HDBC, macid Controllers: web-routes, UrlDisp Frameworks: yesod, kibro, turbinado, happstack, snap Misc: authenticate, openid, clientsession Let's try to get a single page that contains as much of a high-level overview as possible. Just imagine if people new to Haskell could go to one page, get up-to-date information and make informed decisions about their choice in tools. Michael [1] http://www.reddit.com/r/haskell/comments/ch4me/first_impressions_serving_st… [2] http://www.haskell.org/haskellwiki/Practical_web_programming_in_Haskell [3] http://www.haskell.org/haskellwiki/Web [4] http://www.haskell.org/haskellwiki/Applications_and_libraries/Web_programmi… [5] http://www.haskell.org/haskellwiki/Blog_articles/Web [6]

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Google Summer of Code: BlazeHTML RFC
by Jasper Van der Jeugt 03 Jun '10

03 Jun '10

Dear all, BlazeHtml started out on ZuriHac 2010. Now, Jasper Van der Jeugt is working on it as a student to Google Summer of Code for haskell.org. His mentors are Simon Meier and Johan Tibell. The goal is to create a high-performance HTML generation library. In the past few weeks, we have been exploring the performance and design of different drafts of this library. Now, the time has come to ask some questions to the Haskell community — more specifically the future users of BlazeHtml as well as current users of other HTML generation libraries. We have written an RFC to gather feedback from the community: HTML version: http://jaspervdj.be/posts/2010-05-27-blazehtml-rfc.html Plain version: http://github.com/jaspervdj/BlazeHtml/raw/develop/doc/RFC.lhs The easiest way of sending us feedback, comments or criticism is replying to the haskell-cafe thread here. Alternatively, drop a comment at the bottom of the HTML version or at reddit. Looking forward to your feedback, Kind regards, Simon Meier Jasper Van der Jeugt

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Re: Can someone post/point to some simple examples of using hjscript, ideally with happstack?
by Jeremy Shaw 01 Jun '10

01 Jun '10

Hello, HJScript is a royal pain to use, IMO. Though I still use it because I haven't found anything better. There is a little bit of HJScript in this demo starting at line 549: http://src.seereason.com/examples/happstack-imageboard/Web.hs not sure that is going to clear much up though. To pop up an alert box do; window # alert (string "an freaking alert box.") - jeremy On Tue, Jun 1, 2010 at 2:14 PM, Thomas Hartman < thomashartman1(a)googlemail.com> wrote: > Hey, I am starting to integrate some javascript, specifically I am > generating google finance type charts using > > > http://code.google.com/apis/visualization/documentation/gallery/annotatedti… > > from the google charts api. > > This seems like a perfect place to wrap javascript in some typesafe > goodness, but I find the documentation somewhat impenetrable. > > > http://hackage.haskell.org/packages/archive/HJScript/0.5.0/doc/html/HJScrip… > > Could someone that's familiar with hjscript post a synopsis with a > simple use case like popping up a hello world message box or > something? > > Suggestions on other javascript dsls are also welcome. > > Thanks in advance! > > thomas. > > -- > Need somewhere to put your code? http://patch-tag.com > Want to build a webapp? http://happstack.com > > -- > You received this message because you are subscribed to the Google Groups > "Haskell Server Pages" group. > To post to this group, send email to haskell-server-pages(a)googlegroups.com > . > To unsubscribe from this group, send email to > haskell-server-pages+unsubscribe(a)googlegroups.com<haskell-server-pages%2Bunsubscribe(a)googlegroups.com> > . > For more options, visit this group at > http://groups.google.com/group/haskell-server-pages?hl=en. > >

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