.. 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)