.. index:: single: http_process_transport
.. _http_process_transport/0:

.. rst-class:: right

**object**

``http_process_transport``
==========================

Process-backed HTTP transport predicates using the process library and helper processes.

| **Availability:** 
|    ``logtalk_load(http_process_transport(loader))``

| **Author:** Paulo Moura
| **Version:** 1:0:0
| **Date:** 2026-07-17

| **Compilation flags:**
|    ``static, context_switching_calls, threaded``


| **Implements:**
|    ``public`` :ref:`http_transport_protocol <http_transport_protocol/0>`
| **Imports:**
|    ``public`` :ref:`options <options/0>`
|    ``public`` :ref:`http_message_helpers <http_message_helpers/0>`
|    ``public`` :ref:`http_text_helpers <http_text_helpers/0>`
| **Uses:**
|    :ref:`http_client_core <http_client_core/0>`
|    :ref:`http_core <http_core/0>`
|    :ref:`http_server_core <http_server_core/0>`
|    :ref:`list <list/0>`
|    :ref:`logtalk <logtalk/0>`
|    :ref:`os <os/0>`
|    :ref:`process <process/0>`
|    :ref:`reader <reader/0>`
|    :ref:`socket <socket/0>`
|    :ref:`user <user/0>`

| **Remarks:**
|    (none)

| **Inherited public predicates:**
|     :ref:`options_protocol/0::check_option/1`  :ref:`options_protocol/0::check_options/1`  :ref:`http_transport_protocol/0::close_connection/1`  :ref:`http_transport_protocol/0::close_connection_pool/1`  :ref:`http_transport_protocol/0::close_listener/1`  :ref:`http_transport_protocol/0::connection_pool_stats/2`  :ref:`http_transport_protocol/0::connection_streams/3`  :ref:`options_protocol/0::default_option/1`  :ref:`options_protocol/0::default_options/1`  :ref:`http_transport_protocol/0::exchange/3`  :ref:`http_transport_protocol/0::exchange/4`  :ref:`http_transport_protocol/0::exchange/5`  :ref:`http_transport_protocol/0::exchange_sequence/3`  :ref:`http_transport_protocol/0::exchange_sequence/4`  :ref:`http_transport_protocol/0::open_connection/4`  :ref:`http_transport_protocol/0::open_connection_pool/4`  :ref:`http_transport_protocol/0::open_listener/4`  :ref:`options_protocol/0::option/2`  :ref:`options_protocol/0::option/3`  :ref:`http_transport_protocol/0::request_listener_shutdown/1`  :ref:`http_transport_protocol/0::request_shutdown/1`  :ref:`http_transport_protocol/0::serve_listener/4`  :ref:`http_transport_protocol/0::serve_listener/5`  :ref:`http_transport_protocol/0::serve_once/3`  :ref:`http_transport_protocol/0::serve_until_shutdown/4`  :ref:`http_transport_protocol/0::serve_until_shutdown/5`  :ref:`http_transport_protocol/0::serve_websocket_once/5`  :ref:`http_transport_protocol/0::supported_request_scheme/1`  :ref:`http_transport_protocol/0::supported_websocket_scheme/1`  :ref:`options_protocol/0::valid_option/1`  :ref:`options_protocol/0::valid_options/1`  

.. contents::
   :local:
   :backlinks: top

Public predicates
-----------------

.. index:: temporary_tls_credentials/3
.. _http_process_transport/0::temporary_tls_credentials/3:

``temporary_tls_credentials/3``
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

Creates or reuses temporary TLS certificate and key files under the system temporary directory using the given file name prefix.

| **Compilation flags:**
|    ``static``

| **Template:**
|    ``temporary_tls_credentials(Prefix,CertificateFile,KeyFile)``
| **Mode and number of proofs:**
|    ``temporary_tls_credentials(+atom,-atom,-atom)`` - ``one_or_error``

| **Exceptions:**
|    ``Prefix`` is a variable:
|        ``instantiation_error``
|    ``Prefix`` is not an atom:
|        ``type_error(atom,Prefix)``
|    Temporary TLS credentials cannot be created:
|        ``resource_error(http_process_transport_temporary_tls_credentials)``


------------

.. index:: temporary_tls_credentials_files/3
.. _http_process_transport/0::temporary_tls_credentials_files/3:

``temporary_tls_credentials_files/3``
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

Computes the temporary TLS certificate and key file paths used for a given file name prefix without creating the files.

| **Compilation flags:**
|    ``static``

| **Template:**
|    ``temporary_tls_credentials_files(Prefix,CertificateFile,KeyFile)``
| **Mode and number of proofs:**
|    ``temporary_tls_credentials_files(+atom,-atom,-atom)`` - ``one_or_error``

| **Exceptions:**
|    ``Prefix`` is a variable:
|        ``instantiation_error``
|    ``Prefix`` is not an atom:
|        ``type_error(atom,Prefix)``


------------

Protected predicates
--------------------

(no local declarations; see entity ancestors if any)

Private predicates
------------------

.. index:: process_connection_state_/3
.. _http_process_transport/0::process_connection_state_/3:

``process_connection_state_/3``
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

Registered helper-process state for open reusable client connections.

| **Compilation flags:**
|    ``dynamic``

| **Template:**
|    ``process_connection_state_(Connection,Process,Error)``
| **Mode and number of proofs:**
|    ``process_connection_state_(?compound,?ground,?stream)`` - ``zero_or_more``


------------

.. index:: connection_pool_seed_/1
.. _http_process_transport/0::connection_pool_seed_/1:

``connection_pool_seed_/1``
^^^^^^^^^^^^^^^^^^^^^^^^^^^

Last allocated connection pool identifier.

| **Compilation flags:**
|    ``dynamic``

| **Template:**
|    ``connection_pool_seed_(PoolId)``
| **Mode and number of proofs:**
|    ``connection_pool_seed_(?positive_integer)`` - ``zero_or_one``


------------

.. index:: connection_pool_config_/6
.. _http_process_transport/0::connection_pool_config_/6:

``connection_pool_config_/6``
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

Stored connection pool configuration indexed by pool identifier.

| **Compilation flags:**
|    ``dynamic``

| **Template:**
|    ``connection_pool_config_(PoolId,Host,Port,MinSize,MaxSize,ConnectionOptions)``
| **Mode and number of proofs:**
|    ``connection_pool_config_(?positive_integer,?atom,?integer,?non_negative_integer,?positive_integer,?list)`` - ``zero_or_more``


------------

.. index:: connection_pool_available_/2
.. _http_process_transport/0::connection_pool_available_/2:

``connection_pool_available_/2``
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

Reusable idle client connections indexed by pool identifier.

| **Compilation flags:**
|    ``dynamic``

| **Template:**
|    ``connection_pool_available_(PoolId,Connection)``
| **Mode and number of proofs:**
|    ``connection_pool_available_(?positive_integer,?compound)`` - ``zero_or_more``


------------

.. index:: connection_pool_in_use_/2
.. _http_process_transport/0::connection_pool_in_use_/2:

``connection_pool_in_use_/2``
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

Checked-out client connections indexed by pool identifier.

| **Compilation flags:**
|    ``dynamic``

| **Template:**
|    ``connection_pool_in_use_(PoolId,Connection)``
| **Mode and number of proofs:**
|    ``connection_pool_in_use_(?positive_integer,?compound)`` - ``zero_or_more``


------------

.. index:: listener_seed_/1
.. _http_process_transport/0::listener_seed_/1:

``listener_seed_/1``
^^^^^^^^^^^^^^^^^^^^

Last allocated listener identifier.

| **Compilation flags:**
|    ``dynamic``

| **Template:**
|    ``listener_seed_(ListenerId)``
| **Mode and number of proofs:**
|    ``listener_seed_(?positive_integer)`` - ``zero_or_one``


------------

.. index:: process_listener_state_/5
.. _http_process_transport/0::process_listener_state_/5:

``process_listener_state_/5``
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

Registered process state for open listeners.

| **Compilation flags:**
|    ``dynamic``

| **Template:**
|    ``process_listener_state_(ListenerId,Executable,Process,RelayListener,Error)``
| **Mode and number of proofs:**
|    ``process_listener_state_(?positive_integer,?atom,?ground,?compound,?stream)`` - ``zero_or_more``


------------

.. index:: listener_temporary_tls_credentials_/3
.. _http_process_transport/0::listener_temporary_tls_credentials_/3:

``listener_temporary_tls_credentials_/3``
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

Tracked temporary TLS credential files owned by open listeners.

| **Compilation flags:**
|    ``dynamic``

| **Template:**
|    ``listener_temporary_tls_credentials_(ListenerId,CertificateFile,KeyFile)``
| **Mode and number of proofs:**
|    ``listener_temporary_tls_credentials_(?positive_integer,?atom,?atom)`` - ``zero_or_one``


------------

.. index:: listener_handle_alias_/2
.. _http_process_transport/0::listener_handle_alias_/2:

``listener_handle_alias_/2``
^^^^^^^^^^^^^^^^^^^^^^^^^^^^

Maps public listener handles to registered process listener identifiers.

| **Compilation flags:**
|    ``dynamic``

| **Template:**
|    ``listener_handle_alias_(Listener,ListenerId)``
| **Mode and number of proofs:**
|    ``listener_handle_alias_(?term,?positive_integer)`` - ``zero_or_more``


------------

.. index:: listener_event_/2
.. _http_process_transport/0::listener_event_/2:

``listener_event_/2``
^^^^^^^^^^^^^^^^^^^^^

Queued listener events parsed from the listener helper diagnostics stream.

| **Compilation flags:**
|    ``dynamic``

| **Template:**
|    ``listener_event_(ListenerId,Event)``
| **Mode and number of proofs:**
|    ``listener_event_(?positive_integer,?compound)`` - ``zero_or_more``


------------

.. index:: process_listener_shutdown_requested_/1
.. _http_process_transport/0::process_listener_shutdown_requested_/1:

``process_listener_shutdown_requested_/1``
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

Flag recording that a synthetic listener shutdown wakeup is pending.

| **Compilation flags:**
|    ``dynamic``

| **Template:**
|    ``process_listener_shutdown_requested_(ListenerId)``
| **Mode and number of proofs:**
|    ``process_listener_shutdown_requested_(?positive_integer)`` - ``zero_or_one``


------------

.. index:: listener_shutdown_seed_/1
.. _http_process_transport/0::listener_shutdown_seed_/1:

``listener_shutdown_seed_/1``
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

Last allocated shutdown-run identifier.

| **Compilation flags:**
|    ``dynamic``

| **Template:**
|    ``listener_shutdown_seed_(RunId)``
| **Mode and number of proofs:**
|    ``listener_shutdown_seed_(?positive_integer)`` - ``zero_or_one``


------------

.. index:: listener_shutdown_control_/3
.. _http_process_transport/0::listener_shutdown_control_/3:

``listener_shutdown_control_/3``
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

Maps public shutdown control terms to listeners and active serving runs.

| **Compilation flags:**
|    ``dynamic``

| **Template:**
|    ``listener_shutdown_control_(Control,Listener,RunId)``
| **Mode and number of proofs:**
|    ``listener_shutdown_control_(?nonvar,?compound,?positive_integer)`` - ``zero_or_more``


------------

.. index:: listener_shutdown_requested_/2
.. _http_process_transport/0::listener_shutdown_requested_/2:

``listener_shutdown_requested_/2``
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

Recorded shutdown requests for serve_until_shutdown/4 runs.

| **Compilation flags:**
|    ``dynamic``

| **Template:**
|    ``listener_shutdown_requested_(Control,RunId)``
| **Mode and number of proofs:**
|    ``listener_shutdown_requested_(?nonvar,?positive_integer)`` - ``zero_or_one``


------------

.. index:: listener_active_worker_/3
.. _http_process_transport/0::listener_active_worker_/3:

``listener_active_worker_/3``
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

Tracked active connection workers for a serve_until_shutdown/4 run.

| **Compilation flags:**
|    ``dynamic``

| **Template:**
|    ``listener_active_worker_(Control,RunId,Worker)``
| **Mode and number of proofs:**
|    ``listener_active_worker_(?nonvar,?positive_integer,?compound)`` - ``zero_or_more``


------------

Operators
---------

(none)

