Process output in a streaming manner.

This is the most general way of processing the response from the server - you receive the raw bytes as they come in, and you can do whatever you want with them.

write_stream(f)

Arguments

f

Callback function. It should have a single argument, a raw vector containing the bytes recieved from the server. This will usually be 16k or less. The return value of the function is ignored.

Examples

GET(
  "https://github.com/jeroen/data/raw/gh-pages/diamonds.json",
  write_stream(function(x) {
    print(length(x))
    length(x)
  })
)
#> [1] 32768
#> [1] 32768
#> [1] 32768
#> [1] 32768
#> [1] 8437
#> [1] 32768
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#> [1] 13422
#> [1] 32768
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#> [1] 8867
#> [1] 32768
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#> [1] 11874
#> [1] 32768
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#> [1] 23960
#> Response [https://raw.githubusercontent.com/jeroen/data/gh-pages/diamonds.json]
#>   Date: 2025-11-12 19:17
#>   Status: 200
#>   Content-Type: text/plain; charset=utf-8
#> <EMPTY BODY>