Created
March 9, 2019 17:42
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supervisor code
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def process({:get_thumbs, folder_path, json_path}) do | |
# lets start a supervisor here | |
Task.Supervisor.start_link(name: CLI.Supervisor, strategy: :one_for_one, max_timeout: 35) | |
download_thumbs(json_object, 1, folder_fn) | |
# download_thumbs unpacks a list of links inside of json object | |
# and calls donwload_thumbs_files with it | |
end | |
def download_thumbs_files(links, result, path) do | |
# I know I should have used Task.Supervisor.async_nolink | |
# but I could not get it to work. So i used stream and Enum.into as a kind of await | |
# | |
Task.Supervisor.async_stream_nolink(CLI.Supervisor, four, fn url -> | |
file_name = String.split(url, ")") | |
|> Enum.reverse | |
|> hd | |
file_name = Path.join path, file_name | |
Logger.info "Downloading #{url} into #{file_name}" | |
case HTTPoison.get(url, [], [recv_timeout: 20000]) do | |
{:ok, %HTTPoison.Response{status_code: 200, body: body}} -> | |
case File.write(file_name, body) do | |
:ok -> Logger.info "finished writing to #{file_name}" | |
{:error, reason} -> Logger.error "Could not write #{file_name}: #{reason}" | |
end | |
{:ok, %HTTPoison.Response{status_code: 404}} -> | |
Logger.error "404: Not found #{url}" | |
{:error, %HTTPoison.Error{reason: reason}} -> | |
Logger.error "Downloading #{url} failed: #{reason}" | |
end | |
end, [timeout: 21000]) | |
|> Enum.into([]) | |
# recursive call | |
download_thumbs_files(rest, result, path) | |
end |
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