Accessing Open Data Portal (India) using APIs

GOIDataInput.R

####Download the data from Government of India open data portal#####
w_dir = getwd()
source(file=file.path(w_dir,"Code/Core.R"))
checkAndDownload(c("XML","RCurl","RJSONIO","plyr"))

### Alternative - 1: Using APIs ###
#JSON#
getJSONDoc <- function(link, res_id, api_key, offset, no_elements){
  jsonURL = paste(link,
                  "resource_id=",res_id, 
                  "&api-key=",api_key,
                  "&offset=",offset,
                  "&limit=",no_elements,
                  sep="")
  print(jsonURL)
  doc = getURL(jsonURL)
  fromJSON(doc)
}
getFieldNames <- function(t){
#t: list
  names(t[[4]])
}
getCount <- function(t){
  #t: list
  t[[3]]
}
getFieldType<-function(t){
  t[[4]]
}  
getData <- function(t){
  t[[5]]
}
toDataFrame <- function(lst_elmnt){
  as.data.frame(t(unlist(lst_elmnt)), stringsAsFactors = FALSE)
}
acquire_x_data <- function(x,res_id,api_key){
  currentItr = 0
  returnCount = 1
  while(returnCount>0){
    JSONList = getJSONDoc(link="http://data.gov.in/api/datastore/resource.json?",
                           res_id=res_id,
                           api_key=api_key,
                           offset=currentItr,
                           no_elements=100)
    DataStage1 = ldply(getData(JSONList),toDataFrame)
    print(currentItr)
    print(is(DataStage1$id))
    returnCount = getCount(JSONList)
    if(currentItr == 0) {
      returnData = DataStage1
      returnFieldType = ldply(getFieldType(JSONList),toDataFrame)
    }
    else if(returnCount > 0) returnData = rbind(returnData, DataStage1)
    print(currentItr)
    print(is(returnData$id))
    currentItr = currentItr + 1  
  }
  list(returnData,returnFieldType)
}



#get the resource list file
#(it has resource names and resource ids used for the API call)
resourceList = read.table(
  file=file.path(w_dir,"Data/goi_api_resource_details.csv"),
  header=TRUE,
  sep=",",
  as.is=TRUE)

api_key = read.table(
  file=file.path(w_dir,"Data/goi_api_key_do_not_share.csv"),
  header=TRUE,
  sep=",",
  as.is=TRUE)
  
#make the API call  
res = subset(resourceList, resource_name == "pincode")
pincodeDetails = acquire_x_data(x = res[1], res_id = res[2], api_key = api_key)

save(pincodeDetails, file=file.path(w_dir,"Data/pincodeDetails.RData"))

Hi, I have been getting this error message:

Error in function (type, msg, asError = TRUE) :
Unknown SSL protocol error in connection to data.gov.in:443

I'm getting this error as I'm using: https://data.gov.in/api/datastore/resource.json?...
In case I use: http://data.gov.in/api/datastore/resource.json?... I'm getting Error in fromJSON(doc) : no data to parse

Can you provide me some idea how to tackle it, thanks

I am also getting same error.
Error in function (type, msg, asError = TRUE) :
Unknown SSL protocol error in connection to data.gov.in:443