Writing data options

Examples

if (FALSE) {
# write to disk
(x <- HttpClient$new(url = "https://httpbin.org"))
f <- tempfile()
res <- x$get("get", disk = f)
res$content # when using write to disk, content is a path
readLines(res$content)
close(file(f))

# streaming response
(x <- HttpClient$new(url = "https://httpbin.org"))
res <- x$get('stream/50', stream = function(x) cat(rawToChar(x)))
res$content # when streaming, content is NULL


## Async
(cc <- Async$new(
  urls = c(
    'https://httpbin.org/get?a=5',
    'https://httpbin.org/get?foo=bar',
    'https://httpbin.org/get?b=4',
    'https://httpbin.org/get?stuff=things',
    'https://httpbin.org/get?b=4&g=7&u=9&z=1'
  )
))
files <- replicate(5, tempfile())
(res <- cc$get(disk = files, verbose = TRUE))
lapply(files, readLines)

## Async varied
### disk
f <- tempfile()
g <- tempfile()
req1 <- HttpRequest$new(url = "https://httpbin.org/get")$get(disk = f)
req2 <- HttpRequest$new(url = "https://httpbin.org/post")$post(disk = g)
req3 <- HttpRequest$new(url = "https://httpbin.org/get")$get()
(out <- AsyncVaried$new(req1, req2, req3))
out$request()
out$content()
readLines(f)
readLines(g)
out$parse()
close(file(f))
close(file(g))

### stream - to console
fun <- function(x) print(x)
req1 <- HttpRequest$new(url = "https://httpbin.org/get"
)$get(query = list(foo = "bar"), stream = fun)
req2 <- HttpRequest$new(url = "https://httpbin.org/get"
)$get(query = list(hello = "world"), stream = fun)
(out <- AsyncVaried$new(req1, req2))
out$request()
out$content()

### stream - to an R object
lst <- list()
fun <- function(x) lst <<- append(lst, list(x))
req1 <- HttpRequest$new(url = "https://httpbin.org/get"
)$get(query = list(foo = "bar"), stream = fun)
req2 <- HttpRequest$new(url = "https://httpbin.org/get"
)$get(query = list(hello = "world"), stream = fun)
(out <- AsyncVaried$new(req1, req2))
out$request()
lst
cat(vapply(lst, function(z) rawToChar(z$content), ""), sep = "\n")
}