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submitscript.R
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submitscript.R
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checkPkgs <- function() {
pkg.inst <- installed.packages()
pkgs <- c("RCurl", "digest")
have.pkg <- pkgs %in% rownames(pkg.inst)
if(any(!have.pkg)) {
cat("Some packages need to be installed\n")
r <- readline("Install necessary packages [y/n]? ")
if(tolower(r) == "y") {
need <- pkgs[!have.pkg]
message("installing packages ",
paste(need, collapse = ", "))
install.packages(need)
}
}
}
checkPkgs()
CLASS <- "compdata-2012-001"
challenge.url <- paste("http://class.coursera.org", CLASS,
"assignment/challenge", sep = "/")
submit.url <- paste("http://class.coursera.org", CLASS,
"assignment/submit", sep = "/")
loginPrompt <- function() {
email <- readline("Submission login (email): ")
passwd <- readline("Submission password: ")
r <- list(email = email, passwd = passwd)
assign(".CourseraLogin", r, globalenv())
invisible(r)
}
submit <- function(manual = FALSE, resetLogin = FALSE) {
library(RCurl)
library(digest)
if(!manual) {
if(exists(".CourseraLogin") && !resetLogin)
cred <- get(".CourseraLogin")
else
cred <- loginPrompt()
if(!is.list(cred) || !(names(cred) %in% c("email", "passwd")))
stop("problem with login/password")
email <- cred$email
password <- cred$passwd
}
## Prompt Submission Part
sid <- partPrompt()
## Get output
output <- getOutput(sid)
if(!manual) {
## Get challenge
ch <- getChallenge(email)
## Attempt submission with challenge
ch.resp <- challengeResponse(password, ch$ch.key)
results <- submitSolution(email, ch.resp, sid, output, ch$state)
if(!length(results))
results <- "Incorrect!"
cat("Result: ", results, "\n")
}
else {
outfile <- paste(sid, "output.txt", sep = "-")
writeLines(output, outfile)
cat(sprintf("Please upload the file '%s' to Coursera\n",
outfile))
}
invisible()
}
checkResult <- function(r, name = c("best", "rankhospital", "rankall")) {
name <- match.arg(name)
if(name == "best" || name == "rankhospital") {
if(length(r) == 1L && is.na(r))
return(r)
if(!is.character(r))
stop(sprintf("'%s' did not return a character vector",
name))
if(!length(r))
stop(sprintf("'%s' returned character vector of length 0", name))
if(length(r) > 1)
stop(sprintf("'%s' returned a character vector of length > 1", name))
}
else if(name == "rankall") {
if(!is.data.frame(r))
stop(sprintf("'%s' did not return a data frame", name))
if(ncol(r) != 2L)
stop(sprintf("'%s' should return data frame with exactly 2 columns", name))
if(!all(names(r) %in% c("hospital", "state")))
stop("column names of data frame should be 'hospital' and 'state'")
}
r
}
getOutput <- function(sid) {
if(sid == "best-1") {
source("best.R", local = TRUE)
cat("Running test:\n")
cat("best(\"SC\", \"heart attack\")\n")
r <- best("SC", "heart attack")
checkResult(r, "best")
}
else if(sid == "best-2") {
source("best.R", local = TRUE)
cat("Running test:\n")
cat("best(\"NY\", \"pneumonia\")\n")
r <- best("NY", "pneumonia")
checkResult(r, "best")
}
else if(sid == "best-3") {
source("best.R", local = TRUE)
cat("Running test:\n")
cat("best(\"NN\", \"pneumonia\")\n")
r <- tryCatch(best("NN", "pneumonia"), error = function(e) e)
if(!inherits(r, "error"))
stop("'best' should throw an error via the 'stop' function in this case")
tolower(conditionMessage(r))
}
else if(sid == "rankhospital-1") {
source("rankhospital.R", local = TRUE)
cat("Running test:\n")
cat("rankhospital(\"NC\", \"heart attack\", \"worst\")\n")
r <- rankhospital("NC", "heart attack", "worst")
checkResult(r, "rankhospital")
}
else if(sid == "rankhospital-2") {
source("rankhospital.R", local = TRUE)
cat("Running test:\n")
cat("rankhospital(\"WA\", \"heart attack\", 7)\n")
r <- rankhospital("WA", "heart attack", 7)
checkResult(r, "rankhospital")
}
else if(sid == "rankhospital-3") {
source("rankhospital.R", local = TRUE)
cat("Running test:\n")
cat("rankhospital(\"WA\", \"pneumonia\", 1000)\n")
rankhospital("WA", "pneumonia", 1000)
}
else if(sid == "rankhospital-4") {
source("rankhospital.R", local = TRUE)
cat("Running test:\n")
cat("rankhospital(\"NY\", \"heart attak\", 7)\n")
r <- tryCatch({
rankhospital("NY", "heart attak", 7)
}, error = function(e) {
e
})
if(!inherits(r, "error"))
stop("'rankhospital' should throw an error via 'stop' in this case")
tolower(conditionMessage(r))
}
else if(sid == "rankall-1") {
source("rankall.R", local = TRUE)
cat("Running test:\n")
cat("rankall(\"heart attack\", 4)\n")
r <- rankall("heart attack", 4)
r <- checkResult(r, "rankall")
as.character(subset(r, state == "HI")$hospital)
}
else if(sid == "rankall-2") {
source("rankall.R", local = TRUE)
cat("Running test:\n")
cat("rankall(\"pneumonia\", \"worst\")\n")
r <- rankall("pneumonia", "worst")
r <- checkResult(r, "rankall")
as.character(subset(r, state == "NJ")$hospital)
}
else if(sid == "rankall-3") {
source("rankall.R", local = TRUE)
cat("Running test:\n")
cat("rankall(\"heart failure\", 10)\n")
r <- rankall("heart failure", 10)
r <- checkResult(r, "rankall")
as.character(subset(r, state == "NV")$hospital)
}
else {
stop("invalid part number")
}
}
partPrompt <- function() {
sid <- c("best-1",
"best-2",
"best-3",
"rankhospital-1",
"rankhospital-2",
"rankhospital-3",
"rankhospital-4",
"rankall-1",
"rankall-2",
"rankall-3"
)
## Just for testing
## sid <- paste(sid, "dev", sep = "-")
sidname <- c("'best' part 1",
"'best' part 2",
"'best' part 3",
"'rankhospital' part 1",
"'rankhospital' part 2",
"'rankhospital' part 3",
"'rankhospital' part 4",
"'rankall' part 1",
"'rankall' part 2",
"'rankall' part 3"
)
numparts <- length(sid)
cat(paste(paste("[", seq_len(numparts), "]", sep = ""), sidname),
sep = "\n")
partnum <- readline(sprintf("Which part are you submitting [1-%d]? ",
numparts))
partnum <- as.integer(partnum)
if(partnum > numparts)
stop("invalid part number")
sid[partnum]
}
getChallenge <- function(email) {
params <- list(email_address = email, response_encoding = "delim")
result <- getForm(challenge.url, .params = params)
s <- strsplit(result, "|", fixed = TRUE)[[1]]
list(ch.key = s[5], state = s[7])
}
challengeResponse <- function(password, ch.key) {
x <- paste(ch.key, password, sep = "")
digest(x, algo = "sha1", serialize = FALSE)
}
submitSolution <- function(email, ch.resp, sid, output, signature, src = "",
http.version = NULL) {
print(output)
output <- as.character(base64(output))
src <- as.character(base64(src))
params <- list(assignment_part_sid = sid,
email_address = email,
submission = output,
submission_aux = src,
challenge_response = ch.resp,
state = signature)
params <- lapply(params, URLencode)
result <- postForm(submit.url, .params = params)
print(result)
s <- strsplit(result, "\\r\\n")[[1]]
tail(s, 1)
}