this is demo to call clojure from R programming by rest api
This code entirely written using ring-clojure libray which handle http request mainly. It is not full http server
it doesn't provide router, and many things. It is kind a subset http server you can use this to build own web server,
web framework, internet based application. It's just like low-level http server. It provide few middleware to work
In this code I wrote my own middleware. Clojure is language with lisp syntax and great thing about lisp syntax(prefix notation only)
that it doesn't need associativity and precedence rules in syntax structure like other lang c,c++,python,java languages need
and this feature make code easier to understand code for programmer as well as cpu also.In clojure's Ist priority is given to Data > Function > Macros
We can use this code by REPL, war, jar, aot compilation, graalvm native code, docker...etc Most easiest way to use REPL
----------- DEMO IN WINDOWS MACHINE -----------------------
first go to clojure-restR folder then open terminal
C:\Users\ravi\clojure-restR > clj
C:\Users\ravi\clojure-restR > (require '[hello])
C:\Users\ravi\clojure-restR > (hello/run)
call in R
library(httr)
library(jsonlite)
url <- "http://localhost:3000"
d <- c(1,2,3)
j <- toJSON(d)
# post request
req <- POST(url, body = j, encode = "json")
# response
res <- content(req, type = "text", encoding = "UTF-8")
res <- fromJSON(res)
res