Mint.HTTP1 (Mint v1.2.1) View Source

Processless HTTP client with support for HTTP/1 and HTTP/1.1.

This module provides a data structure that represents an HTTP/1 or HTTP/1.1 connection to a given server. The connection is represented as an opaque struct %Mint.HTTP1{}. The connection is a data structure and is not backed by a process, and all the connection handling happens in the process that creates the struct.

This module and data structure work exactly like the ones described in the Mint module, with the exception that Mint.HTTP1 specifically deals with HTTP/1 and HTTP/1.1 while Mint deals seamlessly with HTTP/1, HTTP/1.1, and HTTP/2. For more information on how to use the data structure and client architecture, see Mint.

Link to this section Summary

Types

error_reason()

An HTTP/1-specific error reason.

t()

Functions

close(conn)

See Mint.HTTP.close/1.

connect(scheme, address, port, opts \\ [])

Same as Mint.HTTP.connect/4, but forces an HTTP/1 or HTTP/1.1 connection.

controlling_process(conn, new_pid)

See Mint.HTTP.controlling_process/2.

delete_private(conn, key)

See Mint.HTTP.delete_private/2.

get_private(conn, key, default \\ nil)

See Mint.HTTP.get_private/3.

open?(conn, type \\ :read_write)

See Mint.HTTP.open?/1.

open_request_count(conn)

See Mint.HTTP.open_request_count/1.

put_private(conn, key, value)

See Mint.HTTP.put_private/3.

recv(conn, byte_count, timeout)

See Mint.HTTP.recv/3.

request(conn, method, path, headers, body)

See Mint.HTTP.request/5.

set_mode(conn, mode)

See Mint.HTTP.set_mode/2.

stream(conn, message)

See Mint.HTTP.stream/2.

stream_request_body(conn, ref, body)

See Mint.HTTP.stream_request_body/3.

Link to this section Types

error_reason()

Specs

error_reason() :: term()

An HTTP/1-specific error reason.

The values can be:

:closed - when you try to make a request or stream a body chunk but the connection is closed.
:request_body_is_streaming - when you call request/5 to send a new request but another request is already streaming.
{:unexpected_data, data} - when unexpected data is received from the server.
:invalid_status_line - when the HTTP/1 status line is invalid.
{:invalid_request_target, target} - when the request target is invalid.
:invalid_header - when headers can't be parsed correctly.
{:invalid_header_name, name} - when a header name is invalid.
{:invalid_header_value, name, value} - when a header value is invalid. name is the name of the header and value is the invalid value.
:invalid_chunk_size - when the chunk size is invalid.
:missing_crlf_after_chunk - when the CRLF after a chunk is missing.
:invalid_trailer_header - when trailer headers can't be parsed.
:more_than_one_content_length_header - when more than one content-length headers are in the response.
:transfer_encoding_and_content_length - when both the content-length as well as the transfer-encoding headers are in the response.
{:invalid_content_length_header, value} - when the value of the content-length header is invalid, that is, is not an non-negative integer.
:empty_token_list - when a header that is supposed to contain a list of tokens (such as the connection header) doesn't contain any.
{:invalid_token_list, string} - when a header that is supposed to contain a list of tokens (such as the connection header) contains a malformed list of tokens.
:trailing_headers_but_not_chunked_encoding - when you try to send trailing headers through stream_request_body/3 but the transfer encoding of the request was not chunked.

t()

(opaque)

Specs

t()

Link to this section Functions

close(conn)

Specs

close(t()) :: {:ok, t()}

See Mint.HTTP.close/1.

connect(scheme, address, port, opts \\ [])

Specs

connect(
  Mint.Types.scheme(),
  Mint.Types.address(),
  :inet.port_number(),
  keyword()
) :: {:ok, t()} | {:error, Mint.Types.error()}

Same as Mint.HTTP.connect/4, but forces an HTTP/1 or HTTP/1.1 connection.

This function doesn't support proxying.

controlling_process(conn, new_pid)

(since 0.3.0)

Specs

controlling_process(t(), pid()) :: {:ok, t()} | {:error, Mint.Types.error()}

See Mint.HTTP.controlling_process/2.

delete_private(conn, key)

Specs

delete_private(t(), atom()) :: t()

See Mint.HTTP.delete_private/2.

get_private(conn, key, default \\ nil)

Specs

get_private(t(), atom(), term()) :: term()

See Mint.HTTP.get_private/3.

open?(conn, type \\ :read_write)

Specs

open?(t(), :read | :write | :read_write) :: boolean()

See Mint.HTTP.open?/1.

open_request_count(conn)

Specs

open_request_count(t()) :: non_neg_integer()

See Mint.HTTP.open_request_count/1.

In HTTP/1, the number of open requests is the number of pipelined requests.

put_private(conn, key, value)

Specs

put_private(t(), atom(), term()) :: t()

See Mint.HTTP.put_private/3.

recv(conn, byte_count, timeout)

(since 0.3.0)

Specs

recv(t(), non_neg_integer(), timeout()) ::
  {:ok, t(), [Mint.Types.response()]}
  | {:error, t(), Mint.Types.error(), [Mint.Types.response()]}

See Mint.HTTP.recv/3.

request(conn, method, path, headers, body)

Specs

request(
  t(),
  method :: String.t(),
  path :: String.t(),
  Mint.Types.headers(),
  body :: iodata() | nil | :stream
) :: {:ok, t(), Mint.Types.request_ref()} | {:error, t(), Mint.Types.error()}

See Mint.HTTP.request/5.

In HTTP/1 and HTTP/1.1, you can't open a new request if you're streaming the body of another request. If you try, an error will be returned.

set_mode(conn, mode)

(since 0.3.0)

Specs

set_mode(t(), :active | :passive) :: {:ok, t()} | {:error, Mint.Types.error()}

See Mint.HTTP.set_mode/2.

stream(conn, message)

Specs

stream(t(), term()) ::
  {:ok, t(), [Mint.Types.response()]}
  | {:error, t(), Mint.Types.error(), [Mint.Types.response()]}
  | :unknown

See Mint.HTTP.stream/2.

stream_request_body(conn, ref, body)

Specs

stream_request_body(
  t(),
  Mint.Types.request_ref(),
  iodata() | :eof | {:eof, trailing_headers :: Mint.Types.headers()}
) :: {:ok, t()} | {:error, t(), Mint.Types.error()}

See Mint.HTTP.stream_request_body/3.

In HTTP/1, sending an empty chunk is a no-op.

Transfer encoding and content length

When streaming the request body, Mint cannot send a precalculated content-length request header because it doesn't know the body that you'll stream. However, Mint will transparently handle the presence of a content-length header using this logic:

if you specifically set a content-length header, then transfer encoding and making sure the content length is correct for what you'll stream is up to you.
if you specifically set the transfer encoding (transfer-encoding header) to chunked, then it's up to you to properly encode chunks.
if you don't set the transfer encoding to chunked and don't provide a content-length header, Mint will do implicit chunked transfer encoding (setting the transfer-encoding header appropriately) and will take care of properly encoding the chunks.