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godot-docs-l10n/classes/zh_Hant/class_websocketpeer.rst

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.. _class_WebSocketPeer:
WebSocketPeer
=============
**繼承：** :ref:`PacketPeer<class_PacketPeer>` **<** :ref:`RefCounted<class_RefCounted>` **<** :ref:`Object<class_Object>`
WebSocket 連接。
.. rst-class:: classref-introduction-group
說明
----
這個類代表 WebSocket 連接，可以用作 WebSocket 使用者端（相容 RFC 6455），也可以用作 WebSocket 伺服器的遠端對等體。
發送 WebSocket 二進位影格請使用 :ref:`PacketPeer.put_packet()<class_PacketPeer_method_put_packet>`\ ，發送 WebSocket 文字影格請使用 :ref:`send()<class_WebSocketPeer_method_send>`\ （與基於文字的 API 互動時請優先選擇文字影格）。可以通過 :ref:`was_string_packet()<class_WebSocketPeer_method_was_string_packet>` 檢查最近一個封包的框架型別。
開啟 WebSocket 使用者端的方法是：首先呼叫 :ref:`connect_to_url()<class_WebSocketPeer_method_connect_to_url>`\ ，然後定期調用 :ref:`poll()<class_WebSocketPeer_method_poll>`\ （例如在 :ref:`Node<class_Node>` 的處理過程中）。查詢通訊端的狀態請使用 :ref:`get_ready_state()<class_WebSocketPeer_method_get_ready_state>`\ ，獲取掛起的封包數量請使用 :ref:`PacketPeer.get_available_packet_count()<class_PacketPeer_method_get_available_packet_count>`\ ，獲取掛起的封包請使用 :ref:`PacketPeer.get_packet()<class_PacketPeer_method_get_packet>`\ 。
.. tabs::
.. code-tab:: gdscript
extends Node
var socket = WebSocketPeer.new()
func _ready():
socket.connect_to_url("wss://example.com")
func _process(delta):
socket.poll()
var state = socket.get_ready_state()
if state == WebSocketPeer.STATE_OPEN:
while socket.get_available_packet_count():
print("資料包：", socket.get_packet())
elif state == WebSocketPeer.STATE_CLOSING:
# 繼續輪詢才能正確關閉。
pass
elif state == WebSocketPeer.STATE_CLOSED:
var code = socket.get_close_code()
var reason = socket.get_close_reason()
print("WebSocket 已關閉，程式碼：%d，原因 %s。乾淨得體：%s" % [code, reason, code != -1])
set_process(false) # 停止處理。
如果要作為 WebSocket 伺服器的對等體使用，請參考 :ref:`accept_stream()<class_WebSocketPeer_method_accept_stream>` 及線上教學。
.. rst-class:: classref-reftable-group
屬性
----
.. table::
:widths: auto
+---------------------------------------------------+--------------------------------------------------------------------------------+-------------------------+
| :ref:`PackedStringArray<class_PackedStringArray>` | :ref:`handshake_headers<class_WebSocketPeer_property_handshake_headers>` | ``PackedStringArray()`` |
+---------------------------------------------------+--------------------------------------------------------------------------------+-------------------------+
| :ref:`float<class_float>` | :ref:`heartbeat_interval<class_WebSocketPeer_property_heartbeat_interval>` | ``0.0`` |
+---------------------------------------------------+--------------------------------------------------------------------------------+-------------------------+
| :ref:`int<class_int>` | :ref:`inbound_buffer_size<class_WebSocketPeer_property_inbound_buffer_size>` | ``65535`` |
+---------------------------------------------------+--------------------------------------------------------------------------------+-------------------------+
| :ref:`int<class_int>` | :ref:`max_queued_packets<class_WebSocketPeer_property_max_queued_packets>` | ``4096`` |
+---------------------------------------------------+--------------------------------------------------------------------------------+-------------------------+
| :ref:`int<class_int>` | :ref:`outbound_buffer_size<class_WebSocketPeer_property_outbound_buffer_size>` | ``65535`` |
+---------------------------------------------------+--------------------------------------------------------------------------------+-------------------------+
| :ref:`PackedStringArray<class_PackedStringArray>` | :ref:`supported_protocols<class_WebSocketPeer_property_supported_protocols>` | ``PackedStringArray()`` |
+---------------------------------------------------+--------------------------------------------------------------------------------+-------------------------+
.. rst-class:: classref-reftable-group
方法
----
.. table::
:widths: auto
+----------------------------------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`Error<enum_@GlobalScope_Error>` | :ref:`accept_stream<class_WebSocketPeer_method_accept_stream>`\ (\ stream\: :ref:`StreamPeer<class_StreamPeer>`\ ) |
+----------------------------------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| |void| | :ref:`close<class_WebSocketPeer_method_close>`\ (\ code\: :ref:`int<class_int>` = 1000, reason\: :ref:`String<class_String>` = ""\ ) |
+----------------------------------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`Error<enum_@GlobalScope_Error>` | :ref:`connect_to_url<class_WebSocketPeer_method_connect_to_url>`\ (\ url\: :ref:`String<class_String>`, tls_client_options\: :ref:`TLSOptions<class_TLSOptions>` = null\ ) |
+----------------------------------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`int<class_int>` | :ref:`get_close_code<class_WebSocketPeer_method_get_close_code>`\ (\ ) |const| |
+----------------------------------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`String<class_String>` | :ref:`get_close_reason<class_WebSocketPeer_method_get_close_reason>`\ (\ ) |const| |
+----------------------------------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`String<class_String>` | :ref:`get_connected_host<class_WebSocketPeer_method_get_connected_host>`\ (\ ) |const| |
+----------------------------------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`int<class_int>` | :ref:`get_connected_port<class_WebSocketPeer_method_get_connected_port>`\ (\ ) |const| |
+----------------------------------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`int<class_int>` | :ref:`get_current_outbound_buffered_amount<class_WebSocketPeer_method_get_current_outbound_buffered_amount>`\ (\ ) |const| |
+----------------------------------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`State<enum_WebSocketPeer_State>` | :ref:`get_ready_state<class_WebSocketPeer_method_get_ready_state>`\ (\ ) |const| |
+----------------------------------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`String<class_String>` | :ref:`get_requested_url<class_WebSocketPeer_method_get_requested_url>`\ (\ ) |const| |
+----------------------------------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`String<class_String>` | :ref:`get_selected_protocol<class_WebSocketPeer_method_get_selected_protocol>`\ (\ ) |const| |
+----------------------------------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| |void| | :ref:`poll<class_WebSocketPeer_method_poll>`\ (\ ) |
+----------------------------------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`Error<enum_@GlobalScope_Error>` | :ref:`send<class_WebSocketPeer_method_send>`\ (\ message\: :ref:`PackedByteArray<class_PackedByteArray>`, write_mode\: :ref:`WriteMode<enum_WebSocketPeer_WriteMode>` = 1\ ) |
+----------------------------------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`Error<enum_@GlobalScope_Error>` | :ref:`send_text<class_WebSocketPeer_method_send_text>`\ (\ message\: :ref:`String<class_String>`\ ) |
+----------------------------------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| |void| | :ref:`set_no_delay<class_WebSocketPeer_method_set_no_delay>`\ (\ enabled\: :ref:`bool<class_bool>`\ ) |
+----------------------------------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`bool<class_bool>` | :ref:`was_string_packet<class_WebSocketPeer_method_was_string_packet>`\ (\ ) |const| |
+----------------------------------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
.. rst-class:: classref-section-separator
----
.. rst-class:: classref-descriptions-group
列舉
----
.. _enum_WebSocketPeer_WriteMode:
.. rst-class:: classref-enumeration
enum **WriteMode**: :ref:`🔗<enum_WebSocketPeer_WriteMode>`
.. _class_WebSocketPeer_constant_WRITE_MODE_TEXT:
.. rst-class:: classref-enumeration-constant
:ref:`WriteMode<enum_WebSocketPeer_WriteMode>` **WRITE_MODE_TEXT** = ``0``
指定 WebSockets 消息應作為文字有效載荷傳輸（只允許有效的 UTF-8）。
.. _class_WebSocketPeer_constant_WRITE_MODE_BINARY:
.. rst-class:: classref-enumeration-constant
:ref:`WriteMode<enum_WebSocketPeer_WriteMode>` **WRITE_MODE_BINARY** = ``1``
指定 WebSockets 消息應以二進位有效載荷的形式傳輸（允許任何位元組組合）。
.. rst-class:: classref-item-separator
----
.. _enum_WebSocketPeer_State:
.. rst-class:: classref-enumeration
enum **State**: :ref:`🔗<enum_WebSocketPeer_State>`
.. _class_WebSocketPeer_constant_STATE_CONNECTING:
.. rst-class:: classref-enumeration-constant
:ref:`State<enum_WebSocketPeer_State>` **STATE_CONNECTING** = ``0``
已建立通訊端。連接尚未打開。
.. _class_WebSocketPeer_constant_STATE_OPEN:
.. rst-class:: classref-enumeration-constant
:ref:`State<enum_WebSocketPeer_State>` **STATE_OPEN** = ``1``
連接已打開，通訊就緒。
.. _class_WebSocketPeer_constant_STATE_CLOSING:
.. rst-class:: classref-enumeration-constant
:ref:`State<enum_WebSocketPeer_State>` **STATE_CLOSING** = ``2``
連接正在關閉過程中。這意味著已經向遠端對等體發送了關閉請求，但還沒有收到確認。
.. _class_WebSocketPeer_constant_STATE_CLOSED:
.. rst-class:: classref-enumeration-constant
:ref:`State<enum_WebSocketPeer_State>` **STATE_CLOSED** = ``3``
連接已關閉或無法打開。
.. rst-class:: classref-section-separator
----
.. rst-class:: classref-descriptions-group
屬性說明
--------
.. _class_WebSocketPeer_property_handshake_headers:
.. rst-class:: classref-property
:ref:`PackedStringArray<class_PackedStringArray>` **handshake_headers** = ``PackedStringArray()`` :ref:`🔗<class_WebSocketPeer_property_handshake_headers>`
.. rst-class:: classref-property-setget
- |void| **set_handshake_headers**\ (\ value\: :ref:`PackedStringArray<class_PackedStringArray>`\ )
- :ref:`PackedStringArray<class_PackedStringArray>` **get_handshake_headers**\ (\ )
在 WebSocket 握手過程中要發送的額外 HTTP 標頭。
\ **注意：**\ 由於流覽器的限制，在 Web 匯出中不支援。
**Note:** The returned array is *copied* and any changes to it will not update the original property value. See :ref:`PackedStringArray<class_PackedStringArray>` for more details.
.. rst-class:: classref-item-separator
----
.. _class_WebSocketPeer_property_heartbeat_interval:
.. rst-class:: classref-property
:ref:`float<class_float>` **heartbeat_interval** = ``0.0`` :ref:`🔗<class_WebSocketPeer_property_heartbeat_interval>`
.. rst-class:: classref-property-setget
- |void| **set_heartbeat_interval**\ (\ value\: :ref:`float<class_float>`\ )
- :ref:`float<class_float>` **get_heartbeat_interval**\ (\ )
The interval (in seconds) at which the peer will automatically send WebSocket "ping" control frames. When set to ``0``, no "ping" control frames will be sent.
\ **Note:** Has no effect in Web exports due to browser restrictions.
.. rst-class:: classref-item-separator
----
.. _class_WebSocketPeer_property_inbound_buffer_size:
.. rst-class:: classref-property
:ref:`int<class_int>` **inbound_buffer_size** = ``65535`` :ref:`🔗<class_WebSocketPeer_property_inbound_buffer_size>`
.. rst-class:: classref-property-setget
- |void| **set_inbound_buffer_size**\ (\ value\: :ref:`int<class_int>`\ )
- :ref:`int<class_int>` **get_inbound_buffer_size**\ (\ )
輸入緩衝區的大小，單位為位元組（大致是將分配給入站封包的最大記憶體量）。
.. rst-class:: classref-item-separator
----
.. _class_WebSocketPeer_property_max_queued_packets:
.. rst-class:: classref-property
:ref:`int<class_int>` **max_queued_packets** = ``4096`` :ref:`🔗<class_WebSocketPeer_property_max_queued_packets>`
.. rst-class:: classref-property-setget
- |void| **set_max_queued_packets**\ (\ value\: :ref:`int<class_int>`\ )
- :ref:`int<class_int>` **get_max_queued_packets**\ (\ )
佇列中允許的最大封包數量（包括入站和出站）。
.. rst-class:: classref-item-separator
----
.. _class_WebSocketPeer_property_outbound_buffer_size:
.. rst-class:: classref-property
:ref:`int<class_int>` **outbound_buffer_size** = ``65535`` :ref:`🔗<class_WebSocketPeer_property_outbound_buffer_size>`
.. rst-class:: classref-property-setget
- |void| **set_outbound_buffer_size**\ (\ value\: :ref:`int<class_int>`\ )
- :ref:`int<class_int>` **get_outbound_buffer_size**\ (\ )
輸入緩衝區的大小，單位為位元組（大致是將分配給出站封包的最大記憶體量）。
.. rst-class:: classref-item-separator
----
.. _class_WebSocketPeer_property_supported_protocols:
.. rst-class:: classref-property
:ref:`PackedStringArray<class_PackedStringArray>` **supported_protocols** = ``PackedStringArray()`` :ref:`🔗<class_WebSocketPeer_property_supported_protocols>`
.. rst-class:: classref-property-setget
- |void| **set_supported_protocols**\ (\ value\: :ref:`PackedStringArray<class_PackedStringArray>`\ )
- :ref:`PackedStringArray<class_PackedStringArray>` **get_supported_protocols**\ (\ )
WebSocket 握手期間允許的 WebSocket 子協議。
**Note:** The returned array is *copied* and any changes to it will not update the original property value. See :ref:`PackedStringArray<class_PackedStringArray>` for more details.
.. rst-class:: classref-section-separator
----
.. rst-class:: classref-descriptions-group
方法說明
--------
.. _class_WebSocketPeer_method_accept_stream:
.. rst-class:: classref-method
:ref:`Error<enum_@GlobalScope_Error>` **accept_stream**\ (\ stream\: :ref:`StreamPeer<class_StreamPeer>`\ ) :ref:`🔗<class_WebSocketPeer_method_accept_stream>`
以 WebSocket 伺服器的名義，接受正在執行 HTTP 握手的對等體連接。\ ``stream`` 必須是從 :ref:`TCPServer.take_connection()<class_TCPServer_method_take_connection>` 獲取的有效 TCP 流，或者是從 :ref:`StreamPeerTLS.accept_stream()<class_StreamPeerTLS_method_accept_stream>` 接受的 TLS 流。
\ **注意：**\ 由於流覽器的限制，Web 匯出中不支援此方法。
.. rst-class:: classref-item-separator
----
.. _class_WebSocketPeer_method_close:
.. rst-class:: classref-method
|void| **close**\ (\ code\: :ref:`int<class_int>` = 1000, reason\: :ref:`String<class_String>` = ""\ ) :ref:`🔗<class_WebSocketPeer_method_close>`
關閉該 WebSocket 連接。\ ``code`` 是關閉的狀態碼（有效狀態碼的列表見 RFC 6455 第 7.4 節）。\ ``reason`` 是人類可讀的關閉連接原因（可以是任何小於 123 位元組的 UTF-8 字串）。如果 ``code`` 為負數，則連接會立即關閉，不通知遠程對等體。
\ **注意：**\ 為了實作乾淨得體的關閉，你需要在達到 :ref:`STATE_CLOSED<class_WebSocketPeer_constant_STATE_CLOSED>` 之前保持輪詢。
\ **注意：**\ Web 匯出可能不支援部分狀態碼。詳情請參考具體流覽器的文件。
.. rst-class:: classref-item-separator
----
.. _class_WebSocketPeer_method_connect_to_url:
.. rst-class:: classref-method
:ref:`Error<enum_@GlobalScope_Error>` **connect_to_url**\ (\ url\: :ref:`String<class_String>`, tls_client_options\: :ref:`TLSOptions<class_TLSOptions>` = null\ ) :ref:`🔗<class_WebSocketPeer_method_connect_to_url>`
Connects to the given URL. TLS certificates will be verified against the hostname when connecting using the ``wss://`` protocol. You can pass the optional ``tls_client_options`` parameter to customize the trusted certification authorities, or disable the common name verification. See :ref:`TLSOptions.client()<class_TLSOptions_method_client>` and :ref:`TLSOptions.client_unsafe()<class_TLSOptions_method_client_unsafe>`.
\ **Note:** This method is non-blocking, and will return :ref:`@GlobalScope.OK<class_@GlobalScope_constant_OK>` before the connection is established as long as the provided parameters are valid and the peer is not in an invalid state (e.g. already connected). Regularly call :ref:`poll()<class_WebSocketPeer_method_poll>` (e.g. during :ref:`Node<class_Node>` process) and check the result of :ref:`get_ready_state()<class_WebSocketPeer_method_get_ready_state>` to know whether the connection succeeds or fails.
\ **Note:** To avoid mixed content warnings or errors in Web, you may have to use a ``url`` that starts with ``wss://`` (secure) instead of ``ws://``. When doing so, make sure to use the fully qualified domain name that matches the one defined in the server's TLS certificate. Do not connect directly via the IP address for ``wss://`` connections, as it won't match with the TLS certificate.
.. rst-class:: classref-item-separator
----
.. _class_WebSocketPeer_method_get_close_code:
.. rst-class:: classref-method
:ref:`int<class_int>` **get_close_code**\ (\ ) |const| :ref:`🔗<class_WebSocketPeer_method_get_close_code>`
返回收到的 WebSocket 關閉影格狀態碼，如果連接沒有乾淨地關閉則返回 ``-1``\ 。\ :ref:`get_ready_state()<class_WebSocketPeer_method_get_ready_state>` 返回 :ref:`STATE_CLOSED<class_WebSocketPeer_constant_STATE_CLOSED>` 才能呼叫這個方法。
.. rst-class:: classref-item-separator
----
.. _class_WebSocketPeer_method_get_close_reason:
.. rst-class:: classref-method
:ref:`String<class_String>` **get_close_reason**\ (\ ) |const| :ref:`🔗<class_WebSocketPeer_method_get_close_reason>`
返回收到的 WebSocket 關閉影格狀態原因字串。\ :ref:`get_ready_state()<class_WebSocketPeer_method_get_ready_state>` 返回 :ref:`STATE_CLOSED<class_WebSocketPeer_constant_STATE_CLOSED>` 才能呼叫這個方法。
.. rst-class:: classref-item-separator
----
.. _class_WebSocketPeer_method_get_connected_host:
.. rst-class:: classref-method
:ref:`String<class_String>` **get_connected_host**\ (\ ) |const| :ref:`🔗<class_WebSocketPeer_method_get_connected_host>`
返回已連接對等體的 IP 位址。
\ **注意：**\ 在 Web 匯出中不可用。
.. rst-class:: classref-item-separator
----
.. _class_WebSocketPeer_method_get_connected_port:
.. rst-class:: classref-method
:ref:`int<class_int>` **get_connected_port**\ (\ ) |const| :ref:`🔗<class_WebSocketPeer_method_get_connected_port>`
返回已連接對等體的遠端埠。
\ **注意：**\ 在 Web 匯出中不可用。
.. rst-class:: classref-item-separator
----
.. _class_WebSocketPeer_method_get_current_outbound_buffered_amount:
.. rst-class:: classref-method
:ref:`int<class_int>` **get_current_outbound_buffered_amount**\ (\ ) |const| :ref:`🔗<class_WebSocketPeer_method_get_current_outbound_buffered_amount>`
返回 websocket 輸出緩衝區中的目前資料量。\ **注意：**\ Web 匯出使用 WebSocket.bufferedAmount，而其他平臺使用內部緩衝區。
.. rst-class:: classref-item-separator
----
.. _class_WebSocketPeer_method_get_ready_state:
.. rst-class:: classref-method
:ref:`State<enum_WebSocketPeer_State>` **get_ready_state**\ (\ ) |const| :ref:`🔗<class_WebSocketPeer_method_get_ready_state>`
Returns the ready state of the connection.
.. rst-class:: classref-item-separator
----
.. _class_WebSocketPeer_method_get_requested_url:
.. rst-class:: classref-method
:ref:`String<class_String>` **get_requested_url**\ (\ ) |const| :ref:`🔗<class_WebSocketPeer_method_get_requested_url>`
返回該對等體請求的 URL。該 URL 由傳給 :ref:`connect_to_url()<class_WebSocketPeer_method_connect_to_url>` 的 ``url`` 得出，作為伺服器時則從 HTTP 標頭獲取（即使用 :ref:`accept_stream()<class_WebSocketPeer_method_accept_stream>` 時）。
.. rst-class:: classref-item-separator
----
.. _class_WebSocketPeer_method_get_selected_protocol:
.. rst-class:: classref-method
:ref:`String<class_String>` **get_selected_protocol**\ (\ ) |const| :ref:`🔗<class_WebSocketPeer_method_get_selected_protocol>`
返回這個連接所選用的 WebSocket 子協議，如果未選擇子協定則返回空字串。
.. rst-class:: classref-item-separator
----
.. _class_WebSocketPeer_method_poll:
.. rst-class:: classref-method
|void| **poll**\ (\ ) :ref:`🔗<class_WebSocketPeer_method_poll>`
更新連接狀態並接收傳入的封包。請定期呼叫此函式，保持其清潔狀態。
.. rst-class:: classref-item-separator
----
.. _class_WebSocketPeer_method_send:
.. rst-class:: classref-method
:ref:`Error<enum_@GlobalScope_Error>` **send**\ (\ message\: :ref:`PackedByteArray<class_PackedByteArray>`, write_mode\: :ref:`WriteMode<enum_WebSocketPeer_WriteMode>` = 1\ ) :ref:`🔗<class_WebSocketPeer_method_send>`
使用期望的 ``write_mode`` 發送給定的 ``message``\ 。發送 :ref:`String<class_String>` 時，請優先使用 :ref:`send_text()<class_WebSocketPeer_method_send_text>`\ 。
.. rst-class:: classref-item-separator
----
.. _class_WebSocketPeer_method_send_text:
.. rst-class:: classref-method
:ref:`Error<enum_@GlobalScope_Error>` **send_text**\ (\ message\: :ref:`String<class_String>`\ ) :ref:`🔗<class_WebSocketPeer_method_send_text>`
使用 WebSocket 文字模式發送給定的 ``message``\ 。與協力廠商文字 API 互動時請優先使用這個方法而不是 :ref:`PacketPeer.put_packet()<class_PacketPeer_method_put_packet>`\ （例如使用 :ref:`JSON<class_JSON>` 格式的消息時）。
.. rst-class:: classref-item-separator
----
.. _class_WebSocketPeer_method_set_no_delay:
.. rst-class:: classref-method
|void| **set_no_delay**\ (\ enabled\: :ref:`bool<class_bool>`\ ) :ref:`🔗<class_WebSocketPeer_method_set_no_delay>`
Disable Nagle's algorithm on the underlying TCP socket (default). See :ref:`StreamPeerTCP.set_no_delay()<class_StreamPeerTCP_method_set_no_delay>` for more information.
\ **Note:** Not available in the Web export.
.. rst-class:: classref-item-separator
----
.. _class_WebSocketPeer_method_was_string_packet:
.. rst-class:: classref-method
:ref:`bool<class_bool>` **was_string_packet**\ (\ ) |const| :ref:`🔗<class_WebSocketPeer_method_was_string_packet>`
如果最後收到的封包是作為文字有效載荷發送的，返回 ``true``\ 。見 :ref:`WriteMode<enum_WebSocketPeer_WriteMode>`\ 。
.. |virtual| replace:: :abbr:`virtual (本方法通常需要使用者覆寫才能生效。)`
.. |required| replace:: :abbr:`required (This method is required to be overridden when extending its base class.)`
.. |const| replace:: :abbr:`const (本方法沒有副作用。不會修改該實例的任何成員變數。)`
.. |vararg| replace:: :abbr:`vararg (本方法除了這裡描述的參數外，還可以接受任意數量的參數。)`
.. |constructor| replace:: :abbr:`constructor (本方法用於建構一個型別。)`
.. |static| replace:: :abbr:`static (本方法無需實例即可呼叫，因此可以直接使用類別名稱呼叫。)`
.. |operator| replace:: :abbr:`operator (本方法描述將本型別作為左運算元時可用的有效運算子。)`
.. |bitfield| replace:: :abbr:`BitField (此值是由下列旗標組成的位元遮罩整數。)`
.. |void| replace:: :abbr:`void (無回傳值。)`
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