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diff --git a/lib/tesla/middleware/logger.ex b/lib/tesla/middleware/logger.ex
index 4709e1d..99ee26a 100644
--- a/lib/tesla/middleware/logger.ex
+++ b/lib/tesla/middleware/logger.ex
@@ -1,192 +1,192 @@
defmodule Tesla.Middleware.Logger do
@behaviour Tesla.Middleware
@moduledoc """
Log requests as single line.
Logs request method, url, response status and time taken in milliseconds.
### Example usage
```
defmodule MyClient do
use Tesla
plug Tesla.Middleware.Logger
end
```
### Logger output
```
2017-09-30 13:39:06.663 [info] GET http://example.com -> 200 (736.988 ms)
```
See `Tesla.Middleware.DebugLogger` to log request/response body
"""
require Logger
def call(env, next, _opts) do
{time, env} = :timer.tc(Tesla, :run, [env, next])
_ = log(env, time)
env
rescue
ex in Tesla.Error ->
stacktrace = System.stacktrace()
_ = log(env, ex)
reraise ex, stacktrace
end
defp log(env, %Tesla.Error{message: message}) do
Logger.error("#{normalize_method(env)} #{env.url} -> #{message}")
end
defp log(env, time) do
ms = :io_lib.format("~.3f", [time / 1000])
message = "#{normalize_method(env)} #{env.url} -> #{env.status} (#{ms} ms)"
cond do
env.status >= 400 -> Logger.error(message)
env.status >= 300 -> Logger.warn(message)
true -> Logger.info(message)
end
end
defp normalize_method(env) do
env.method |> to_string() |> String.upcase()
end
end
defmodule Tesla.Middleware.DebugLogger do
@behaviour Tesla.Middleware
@moduledoc """
- Log full reqeust/response content
+ Log full request/response content
### Example usage
```
defmodule MyClient do
use Tesla
plug Tesla.Middleware.DebugLogger
end
```
### Logger output
```
2017-09-30 13:41:56.281 [debug] > POST https://httpbin.org/post
2017-09-30 13:41:56.281 [debug]
2017-09-30 13:41:56.281 [debug] > a=3
2017-09-30 13:41:56.432 [debug]
2017-09-30 13:41:56.432 [debug] < HTTP/1.1 200
2017-09-30 13:41:56.432 [debug] < access-control-allow-credentials: true
2017-09-30 13:41:56.432 [debug] < access-control-allow-origin: *
2017-09-30 13:41:56.432 [debug] < connection: keep-alive
2017-09-30 13:41:56.432 [debug] < content-length: 280
2017-09-30 13:41:56.432 [debug] < content-type: application/json
2017-09-30 13:41:56.432 [debug] < date: Sat, 30 Sep 2017 11:41:55 GMT
2017-09-30 13:41:56.432 [debug] < server: meinheld/0.6.1
2017-09-30 13:41:56.432 [debug] < via: 1.1 vegur
2017-09-30 13:41:56.432 [debug] < x-powered-by: Flask
2017-09-30 13:41:56.432 [debug] < x-processed-time: 0.0011260509491
2017-09-30 13:41:56.432 [debug]
2017-09-30 13:41:56.432 [debug] > {
"args": {},
"data": "a=3",
"files": {},
"form": {},
"headers": {
"Connection": "close",
"Content-Length": "3",
"Content-Type": "",
"Host": "httpbin.org"
},
"json": null,
"origin": "0.0.0.0",
"url": "https://httpbin.org/post"
}
```
"""
require Logger
def call(env, next, _opts) do
env
|> log_request
|> log_headers("> ")
|> log_params("> ")
|> log_body("> ")
|> Tesla.run(next)
|> log_response
|> log_headers("< ")
|> log_body("< ")
rescue
ex in Tesla.Error ->
stacktrace = System.stacktrace()
_ = log_exception(ex, "< ")
reraise ex, stacktrace
end
defp log_request(env) do
_ = Logger.debug("> #{env.method |> to_string |> String.upcase()} #{env.url}")
env
end
defp log_response(env) do
_ = Logger.debug("")
_ = Logger.debug("< HTTP/1.1 #{env.status}")
env
end
defp log_headers(env, prefix) do
for {k, v} <- env.headers do
_ = Logger.debug("#{prefix}#{k}: #{v}")
end
env
end
defp log_params(env, prefix) do
encoded_query = Enum.flat_map(env.query, &Tesla.encode_pair/1)
for {k, v} <- encoded_query do
_ = Logger.debug("#{prefix} Query Param '#{k}': '#{v}'")
end
env
end
defp log_body(%Tesla.Env{} = env, _prefix) do
Map.update!(env, :body, &log_body(&1, "> "))
end
defp log_body(nil, _), do: nil
defp log_body([], _), do: nil
defp log_body(%Stream{} = stream, prefix), do: log_body_stream(stream, prefix)
defp log_body(stream, prefix) when is_function(stream), do: log_body_stream(stream, prefix)
defp log_body(%Tesla.Multipart{} = mp, prefix), do: log_multipart_body(mp, prefix)
defp log_body(data, prefix) when is_binary(data) or is_list(data) do
_ = Logger.debug("")
_ = Logger.debug(prefix <> to_string(data))
data
end
defp log_body_stream(stream, prefix) do
_ = Logger.debug("")
Stream.each(stream, fn line -> Logger.debug(prefix <> line) end)
end
defp log_multipart_body(%Tesla.Multipart{} = mp, prefix) do
_ = Logger.debug("")
_ = Logger.debug(prefix <> "boundary: " <> mp.boundary)
_ = Logger.debug(prefix <> "content_type_params: " <> inspect(mp.content_type_params))
Enum.each(mp.parts, &Logger.debug(prefix <> inspect(&1)))
mp
end
defp log_exception(%Tesla.Error{message: message, reason: reason}, prefix) do
_ = Logger.debug(prefix <> message <> " (#{inspect(reason)})")
end
end

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