-
Notifications
You must be signed in to change notification settings - Fork 573
/
adapter.ex
75 lines (62 loc) · 2.45 KB
/
adapter.ex
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
defmodule Plug.Conn.Adapter do
@moduledoc """
Specification of the connection adapter API implemented by webservers
"""
alias Plug.Conn
@typep payload :: term
@doc """
Sends the given status, headers and body as a response
back to the client.
If the request has method `"HEAD"`, the adapter should
not send the response to the client.
Webservers are advised to return `nil` as the sent_body,
as the body can no longer be manipulated. However, the
test implementation returns the actual body so it can
be used during testing.
"""
@callback send_resp(payload, Conn.status, Conn.headers, Conn.body) ::
{:ok, sent_body :: binary | nil, payload}
@doc """
Sends the given status, headers and file as a response
back to the client.
If the request has method `"HEAD"`, the adapter should
not send the response to the client.
Webservers are advised to return `nil` as the sent_body,
as the body can no longer be manipulated. However, the
test implementation returns the actual body so it can
be used during testing.
"""
@callback send_file(payload, Conn.status, Conn.headers, file :: binary,
offset :: integer, length :: integer | :all) ::
{:ok, sent_body :: binary | nil, payload}
@doc """
Sends the given status, headers as the beginning of
a chunked response to the client.
Webservers are advised to return `nil` as the sent_body,
as the body can no longer be manipulated. However, the
test implementation returns the actual body so it can
be used during testing.
"""
@callback send_chunked(payload, Conn.status, Conn.headers) ::
{:ok, sent_body :: binary | nil, payload}
@doc """
Sends a chunk in the chunked response.
If the request has method `"HEAD"`, the adapter should
not send the response to the client.
Webservers are advised to return `:ok` and not modify
any further state for each chunk. However, the test
implementation returns the actual body and payload so
it can be used during testing.
"""
@callback chunk(payload, Conn.status) ::
:ok | {:ok, sent_body :: binary, payload} | {:error, term}
@doc """
Reads the request body.
Read the docs in `Plug.Conn.read_body/2` for the supported
options and expected behaviour.
"""
@callback read_req_body(payload, options :: Keyword.t) ::
{:ok, data :: binary, payload} |
{:more, data :: binary, payload} |
{:error, term}
end