[racket-dev] form:binding / request utilities
I'm doing a web-server/insta example in class, and one of my students (Arlo White, cc:'ed) pointed out that the existing framework for extracting bindings seems to be missing a bunch of useful functions. In particular, he volunteered to implement a few of the functions from the Spring framework, most notably a function that accepts a request and a name and returns the string associated with that name in the request's bindings. Like hash-ref, it would allow you to specify your own failure behavior. I've run into this myself, and it's always a pain to operate on the request structures. Would you be open to adding a few functions like this to the web-server (if we provide them, along with docs and tests)? Looking at the documentation, it appears that there's some cleanup that just never made it to the top of someone's list. John smime.p7s Description: S/MIME cryptographic signature _ For list-related administrative tasks: http://lists.racket-lang.org/listinfo/dev
Re: [racket-dev] form:binding / request utilities
That sounds reasonable. Here are a few things: 1) I almost exclusively use formlets, where these issues are basically taken care of. I suggest checking them out. 2) Would it be good for the request struct to be a prop:dict where the dictionary is the bindings? Would that be confusing because it is also plausible to dictionary on the headers? 3) Part of what you want is just request-bindings, but request-bindings has lots of subtle bugs. For example, HTTP does not mandate UTF-8, so naive conversion to Racket strings can crash. HTTP differentiates between form bindings and file bindings---for files you definitely want the bytes and you should also be able to get the filename. 4) The docs are in web-server/scribblings/http.scrbl; The tests are in tests/web-server/private/request-test.rkt and tests/web-server/servlet/bindings-test.rkt Jay 2011/3/4 John Clements cleme...@brinckerhoff.org: I'm doing a web-server/insta example in class, and one of my students (Arlo White, cc:'ed) pointed out that the existing framework for extracting bindings seems to be missing a bunch of useful functions. In particular, he volunteered to implement a few of the functions from the Spring framework, most notably a function that accepts a request and a name and returns the string associated with that name in the request's bindings. Like hash-ref, it would allow you to specify your own failure behavior. I've run into this myself, and it's always a pain to operate on the request structures. Would you be open to adding a few functions like this to the web-server (if we provide them, along with docs and tests)? Looking at the documentation, it appears that there's some cleanup that just never made it to the top of someone's list. John -- Jay McCarthy j...@cs.byu.edu Assistant Professor / Brigham Young University http://faculty.cs.byu.edu/~jay The glory of God is Intelligence - DC 93 _ For list-related administrative tasks: http://lists.racket-lang.org/listinfo/dev
Re: [racket-dev] overwrite
On 27.02.11 23:33, Eli Barzilay wrote: Two hours ago, John Clements wrote: Add'l data point: I tried messing up the clock manually, by turning off NTP, but I was unable to duplicate the bug this way. NTP is unlikely to be the problem, since the times are saved on the filesystem, independently of the system time (or clock). And since Robby says that DrR compares only the time value regardless of being in the future, then there shouldn't be any problem with that. If NTP or clock drift was the reason then makefiles would not work and vim would also complain a lot (an this is not the case, at least for me). I do not use network mounts or git and I too get this message almost all the time on OS X. I will try to track it down using the patches posted in this thread. -- regards, Jakub Piotr Cłapa _ For list-related administrative tasks: http://lists.racket-lang.org/listinfo/dev
