Append to a file.

Append to a file.

adls_append(adls, file, path)

Arguments

adls	adls S3 object, generated using adls().
file	form_file S3 object, representing the "thing" to be uploaded. You can compose this using httr::upload_file() or curl::form_file().
path	character, remote path, defined with respect to root-path in adls$base_url. You may find file.path() to be useful to compose the path.

Value

A logical indicating success of the operation.

See also

WebHDFS documentation for "Append to a File"

Examples

not_run({
    # create token (assumes Azure native app)
    token <- AzureOAuth::oauth_token_azure(
      tenant_id = "aaaaaaaa-bbbb-cccc-dddd-eeeeeeeeeeee",
      application_id = "ffffffff-gggg-hhhh-iiii-jjjjjjjjjjjj",
      name = "foo"
    )

    # create adls object with base-URL and token
    adls_example <- adls(
      base_url = adls_url("bar"),
      token = token
    )

    # for this example, write a temporary file
    temp_file <- tempfile(fileext = ".csv")
    write.csv(iris, file = temp_file)

    # upload file
    adls_create(
      adls_example,
      file = httr::file_upload(temp_file),
      path = "iris.csv"
    )

    # append with another copy of iris.csv
    adls_append(
      adls_example,
      file = httr::file_upload(temp_file),
      path = "iris.csv"
    )
})