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<article id="content">
<header>
<h1 class="title">Module <code>spin_sdk.http.poll_loop</code></h1>
</header>
<section id="section-intro">
<p>Defines a custom <code>asyncio</code> event loop backed by <code>wasi:io/poll#poll</code>.</p>
<p>This also includes helper classes and functions for working with <code>wasi:http</code>.</p>
<p>As of WASI Preview 2, there is not yet a standard for first-class, composable
asynchronous functions and streams.
We expect that little or none of this
boilerplate will be needed once those features arrive in Preview 3.</p>
<details class="source">
<summary>
<span>Expand source code</span>
</summary>
<pre><code class="python">"""Defines a custom `asyncio` event loop backed by `wasi:io/poll#poll`.
This also includes helper classes and functions for working with `wasi:http`.
As of WASI Preview 2, there is not yet a standard for first-class, composable
asynchronous functions and streams. We expect that little or none of this
boilerplate will be needed once those features arrive in Preview 3.
"""
import asyncio
import socket
import subprocess
from spin_sdk.wit.types import Ok, Err
from spin_sdk.wit.imports import types, streams, poll, outgoing_handler
from spin_sdk.wit.imports.types import IncomingBody, OutgoingBody, OutgoingRequest, IncomingResponse
from spin_sdk.wit.imports.streams import StreamErrorClosed, InputStream
from spin_sdk.wit.imports.poll import Pollable
from typing import Optional, cast
# Maximum number of bytes to read at a time
READ_SIZE: int = 16 * 1024
async def send(request: OutgoingRequest) -> IncomingResponse:
"""Send the specified request and wait asynchronously for the response."""
future = outgoing_handler.handle(request, None)
while True:
response = future.get()
if response is None:
await register(cast(PollLoop, asyncio.get_event_loop()), future.subscribe())
else:
future.__exit__()
if isinstance(response, Ok):
if isinstance(response.value, Ok):
return response.value.value
else:
raise response.value
else:
raise response
class Stream:
"""Reader abstraction over `wasi:http/types#incoming-body`."""
def __init__(self, body: IncomingBody):
self.body: Optional[IncomingBody] = body
self.stream: Optional[InputStream] = body.stream()
async def next(self) -> Optional[bytes]:
"""Wait for the next chunk of data to arrive on the stream.
This will return `None` when the end of the stream has been reached.
"""
while True:
try:
if self.stream is None:
return None
else:
buffer = self.stream.read(READ_SIZE)
if len(buffer) == 0:
await register(cast(PollLoop, asyncio.get_event_loop()), self.stream.subscribe())
else:
return buffer
except Err as e:
if isinstance(e.value, StreamErrorClosed):
if self.stream is not None:
self.stream.__exit__()
self.stream = None
if self.body is not None:
IncomingBody.finish(self.body)
self.body = None
else:
raise e
class Sink:
"""Writer abstraction over `wasi-http/types#outgoing-body`."""
def __init__(self, body: OutgoingBody):
self.body = body
self.stream = body.write()
async def send(self, chunk: bytes):
"""Write the specified bytes to the sink.
This may need to yield according to the backpressure requirements of the sink.
"""
offset = 0
flushing = False
while True:
count = self.stream.check_write()
if count == 0:
await register(cast(PollLoop, asyncio.get_event_loop()), self.stream.subscribe())
elif offset == len(chunk):
if flushing:
return
else:
self.stream.flush()
flushing = True
else:
count = min(count, len(chunk) - offset)
self.stream.write(chunk[offset:offset+count])
offset += count
def close(self):
"""Close the stream, indicating no further data will be written."""
self.stream.__exit__()
self.stream = None
OutgoingBody.finish(self.body, None)
self.body = None
class PollLoop(asyncio.AbstractEventLoop):
"""Custom `asyncio` event loop backed by `wasi:io/poll#poll`."""
def __init__(self):
self.wakers = []
self.running = False
self.handles = []
self.exception = None
def get_debug(self):
return False
def run_until_complete(self, future):
future = asyncio.ensure_future(future, loop=self)
self.running = True
asyncio.events._set_running_loop(self)
while self.running and not future.done():
handle = self.handles[0]
self.handles = self.handles[1:]
if not handle._cancelled:
handle._run()
if self.wakers:
[pollables, wakers] = list(map(list, zip(*self.wakers)))
new_wakers = []
ready = [False] * len(pollables)
for index in poll.poll(pollables):
ready[index] = True
for (ready, pollable), waker in zip(zip(ready, pollables), wakers):
if ready:
pollable.__exit__()
waker.set_result(None)
else:
new_wakers.append((pollable, waker))
self.wakers = new_wakers
if self.exception is not None:
raise self.exception
future.result()
def is_running(self):
return self.running
def is_closed(self):
return not self.running
def stop(self):
self.running = False
def close(self):
self.running = False
def shutdown_asyncgens(self):
pass
def call_exception_handler(self, context):
self.exception = context.get('exception', None)
def call_soon(self, callback, *args, context=None):
handle = asyncio.Handle(callback, args, self, context)
self.handles.append(handle)
return handle
def create_task(self, coroutine):
return asyncio.Task(coroutine, loop=self)
def create_future(self):
return asyncio.Future(loop=self)
# The remaining methods should be irrelevant for our purposes and thus unimplemented
def run_forever(self):
raise NotImplementedError
async def shutdown_default_executor(self):
raise NotImplementedError
def _timer_handle_cancelled(self, handle):
raise NotImplementedError
def call_later(self, delay, callback, *args, context=None):
raise NotImplementedError
def call_at(self, when, callback, *args, context=None):
raise NotImplementedError
def time(self):
raise NotImplementedError
def call_soon_threadsafe(self, callback, *args, context=None):
raise NotImplementedError
def run_in_executor(self, executor, func, *args):
raise NotImplementedError
def set_default_executor(self, executor):
raise NotImplementedError
async def getaddrinfo(self, host, port, *,
family=0, type=0, proto=0, flags=0):
raise NotImplementedError
async def getnameinfo(self, sockaddr, flags=0):
raise NotImplementedError
async def create_connection(
self, protocol_factory, host=None, port=None,
*, ssl=None, family=0, proto=0,
flags=0, sock=None, local_addr=None,
server_hostname=None,
ssl_handshake_timeout=None,
ssl_shutdown_timeout=None,
happy_eyeballs_delay=None, interleave=None):
raise NotImplementedError
async def create_server(
self, protocol_factory, host=None, port=None,
*, family=socket.AF_UNSPEC,
flags=socket.AI_PASSIVE, sock=None, backlog=100,
ssl=None, reuse_address=None, reuse_port=None,
ssl_handshake_timeout=None,
ssl_shutdown_timeout=None,
start_serving=True):
raise NotImplementedError
async def sendfile(self, transport, file, offset=0, count=None,
*, fallback=True):
raise NotImplementedError
async def start_tls(self, transport, protocol, sslcontext, *,
server_side=False,
server_hostname=None,
ssl_handshake_timeout=None,
ssl_shutdown_timeout=None):
raise NotImplementedError
async def create_unix_connection(
self, protocol_factory, path=None, *,
ssl=None, sock=None,
server_hostname=None,
ssl_handshake_timeout=None,
ssl_shutdown_timeout=None):
raise NotImplementedError
async def create_unix_server(
self, protocol_factory, path=None, *,
sock=None, backlog=100, ssl=None,
ssl_handshake_timeout=None,
ssl_shutdown_timeout=None,
start_serving=True):
raise NotImplementedError
async def connect_accepted_socket(
self, protocol_factory, sock,
*, ssl=None,
ssl_handshake_timeout=None,
ssl_shutdown_timeout=None):
raise NotImplementedError
async def create_datagram_endpoint(self, protocol_factory,
local_addr=None, remote_addr=None, *,
family=0, proto=0, flags=0,
reuse_address=None, reuse_port=None,
allow_broadcast=None, sock=None):
raise NotImplementedError
async def connect_read_pipe(self, protocol_factory, pipe):
raise NotImplementedError
async def connect_write_pipe(self, protocol_factory, pipe):
raise NotImplementedError
async def subprocess_shell(self, protocol_factory, cmd, *,
stdin=subprocess.PIPE,
stdout=subprocess.PIPE,
stderr=subprocess.PIPE,
**kwargs):
raise NotImplementedError
async def subprocess_exec(self, protocol_factory, *args,
stdin=subprocess.PIPE,
stdout=subprocess.PIPE,
stderr=subprocess.PIPE,
**kwargs):
raise NotImplementedError
def add_reader(self, fd, callback, *args):
raise NotImplementedError
def remove_reader(self, fd):
raise NotImplementedError
def add_writer(self, fd, callback, *args):
raise NotImplementedError
def remove_writer(self, fd):
raise NotImplementedError
async def sock_recv(self, sock, nbytes):
raise NotImplementedError
async def sock_recv_into(self, sock, buf):
raise NotImplementedError
async def sock_recvfrom(self, sock, bufsize):
raise NotImplementedError
async def sock_recvfrom_into(self, sock, buf, nbytes=0):
raise NotImplementedError
async def sock_sendall(self, sock, data):
raise NotImplementedError
async def sock_sendto(self, sock, data, address):
raise NotImplementedError
async def sock_connect(self, sock, address):
raise NotImplementedError
async def sock_accept(self, sock):
raise NotImplementedError
async def sock_sendfile(self, sock, file, offset=0, count=None,
*, fallback=None):
raise NotImplementedError
def add_signal_handler(self, sig, callback, *args):
raise NotImplementedError
def remove_signal_handler(self, sig):
raise NotImplementedError
def set_task_factory(self, factory):
raise NotImplementedError
def get_task_factory(self):
raise NotImplementedError
def get_exception_handler(self):
raise NotImplementedError
def set_exception_handler(self, handler):
raise NotImplementedError
def default_exception_handler(self, context):
raise NotImplementedError
def set_debug(self, enabled):
raise NotImplementedError
async def register(loop: PollLoop, pollable: Pollable):
waker = loop.create_future()
loop.wakers.append((pollable, waker))
await waker</code></pre>
</details>
</section>
<section>
</section>
<section>
</section>
<section>
<h2 class="section-title" id="header-functions">Functions</h2>
<dl>
<dt id="spin_sdk.http.poll_loop.register"><code class="name flex">
<span>async def <span class="ident">register</span></span>(<span>loop: <a title="spin_sdk.http.poll_loop.PollLoop" href="#spin_sdk.http.poll_loop.PollLoop">PollLoop</a>, pollable: <a title="spin_sdk.wit.imports.poll.Pollable" href="../wit/imports/poll.html#spin_sdk.wit.imports.poll.Pollable">Pollable</a>)</span>
</code></dt>
<dd>
<div class="desc"></div>
<details class="source">
<summary>
<span>Expand source code</span>
</summary>
<pre><code class="python">async def register(loop: PollLoop, pollable: Pollable):
waker = loop.create_future()
loop.wakers.append((pollable, waker))
await waker</code></pre>
</details>
</dd>
<dt id="spin_sdk.http.poll_loop.send"><code class="name flex">
<span>async def <span class="ident">send</span></span>(<span>request: <a title="spin_sdk.wit.imports.types.OutgoingRequest" href="../wit/imports/types.html#spin_sdk.wit.imports.types.OutgoingRequest">OutgoingRequest</a>) ‑> <a title="spin_sdk.wit.imports.types.IncomingResponse" href="../wit/imports/types.html#spin_sdk.wit.imports.types.IncomingResponse">IncomingResponse</a></span>
</code></dt>
<dd>
<div class="desc"><p>Send the specified request and wait asynchronously for the response.</p></div>
<details class="source">
<summary>
<span>Expand source code</span>
</summary>
<pre><code class="python">async def send(request: OutgoingRequest) -> IncomingResponse:
"""Send the specified request and wait asynchronously for the response."""
future = outgoing_handler.handle(request, None)
while True:
response = future.get()
if response is None:
await register(cast(PollLoop, asyncio.get_event_loop()), future.subscribe())
else:
future.__exit__()
if isinstance(response, Ok):
if isinstance(response.value, Ok):
return response.value.value
else:
raise response.value
else:
raise response</code></pre>
</details>
</dd>
</dl>
</section>
<section>
<h2 class="section-title" id="header-classes">Classes</h2>
<dl>
<dt id="spin_sdk.http.poll_loop.PollLoop"><code class="flex name class">
<span>class <span class="ident">PollLoop</span></span>
</code></dt>
<dd>
<div class="desc"><p>Custom <code>asyncio</code> event loop backed by <code>wasi:io/poll#poll</code>.</p></div>
<details class="source">
<summary>
<span>Expand source code</span>
</summary>
<pre><code class="python">class PollLoop(asyncio.AbstractEventLoop):
"""Custom `asyncio` event loop backed by `wasi:io/poll#poll`."""
def __init__(self):
self.wakers = []
self.running = False
self.handles = []
self.exception = None
def get_debug(self):
return False
def run_until_complete(self, future):
future = asyncio.ensure_future(future, loop=self)
self.running = True
asyncio.events._set_running_loop(self)
while self.running and not future.done():
handle = self.handles[0]
self.handles = self.handles[1:]
if not handle._cancelled:
handle._run()
if self.wakers:
[pollables, wakers] = list(map(list, zip(*self.wakers)))
new_wakers = []
ready = [False] * len(pollables)
for index in poll.poll(pollables):
ready[index] = True
for (ready, pollable), waker in zip(zip(ready, pollables), wakers):
if ready:
pollable.__exit__()
waker.set_result(None)
else:
new_wakers.append((pollable, waker))
self.wakers = new_wakers
if self.exception is not None:
raise self.exception
future.result()
def is_running(self):
return self.running
def is_closed(self):
return not self.running
def stop(self):
self.running = False
def close(self):
self.running = False
def shutdown_asyncgens(self):
pass
def call_exception_handler(self, context):
self.exception = context.get('exception', None)
def call_soon(self, callback, *args, context=None):
handle = asyncio.Handle(callback, args, self, context)
self.handles.append(handle)
return handle
def create_task(self, coroutine):
return asyncio.Task(coroutine, loop=self)
def create_future(self):
return asyncio.Future(loop=self)
# The remaining methods should be irrelevant for our purposes and thus unimplemented
def run_forever(self):
raise NotImplementedError
async def shutdown_default_executor(self):
raise NotImplementedError
def _timer_handle_cancelled(self, handle):
raise NotImplementedError
def call_later(self, delay, callback, *args, context=None):
raise NotImplementedError
def call_at(self, when, callback, *args, context=None):
raise NotImplementedError
def time(self):
raise NotImplementedError
def call_soon_threadsafe(self, callback, *args, context=None):
raise NotImplementedError
def run_in_executor(self, executor, func, *args):
raise NotImplementedError
def set_default_executor(self, executor):
raise NotImplementedError
async def getaddrinfo(self, host, port, *,
family=0, type=0, proto=0, flags=0):
raise NotImplementedError
async def getnameinfo(self, sockaddr, flags=0):
raise NotImplementedError
async def create_connection(
self, protocol_factory, host=None, port=None,
*, ssl=None, family=0, proto=0,
flags=0, sock=None, local_addr=None,
server_hostname=None,
ssl_handshake_timeout=None,
ssl_shutdown_timeout=None,
happy_eyeballs_delay=None, interleave=None):
raise NotImplementedError
async def create_server(
self, protocol_factory, host=None, port=None,
*, family=socket.AF_UNSPEC,
flags=socket.AI_PASSIVE, sock=None, backlog=100,
ssl=None, reuse_address=None, reuse_port=None,
ssl_handshake_timeout=None,
ssl_shutdown_timeout=None,
start_serving=True):
raise NotImplementedError
async def sendfile(self, transport, file, offset=0, count=None,
*, fallback=True):
raise NotImplementedError
async def start_tls(self, transport, protocol, sslcontext, *,
server_side=False,
server_hostname=None,
ssl_handshake_timeout=None,
ssl_shutdown_timeout=None):
raise NotImplementedError
async def create_unix_connection(
self, protocol_factory, path=None, *,
ssl=None, sock=None,
server_hostname=None,
ssl_handshake_timeout=None,
ssl_shutdown_timeout=None):
raise NotImplementedError
async def create_unix_server(
self, protocol_factory, path=None, *,
sock=None, backlog=100, ssl=None,
ssl_handshake_timeout=None,
ssl_shutdown_timeout=None,
start_serving=True):
raise NotImplementedError
async def connect_accepted_socket(
self, protocol_factory, sock,
*, ssl=None,
ssl_handshake_timeout=None,
ssl_shutdown_timeout=None):
raise NotImplementedError
async def create_datagram_endpoint(self, protocol_factory,
local_addr=None, remote_addr=None, *,
family=0, proto=0, flags=0,
reuse_address=None, reuse_port=None,
allow_broadcast=None, sock=None):
raise NotImplementedError
async def connect_read_pipe(self, protocol_factory, pipe):
raise NotImplementedError
async def connect_write_pipe(self, protocol_factory, pipe):
raise NotImplementedError
async def subprocess_shell(self, protocol_factory, cmd, *,
stdin=subprocess.PIPE,
stdout=subprocess.PIPE,
stderr=subprocess.PIPE,
**kwargs):
raise NotImplementedError
async def subprocess_exec(self, protocol_factory, *args,
stdin=subprocess.PIPE,
stdout=subprocess.PIPE,
stderr=subprocess.PIPE,
**kwargs):
raise NotImplementedError
def add_reader(self, fd, callback, *args):
raise NotImplementedError
def remove_reader(self, fd):
raise NotImplementedError
def add_writer(self, fd, callback, *args):
raise NotImplementedError
def remove_writer(self, fd):
raise NotImplementedError
async def sock_recv(self, sock, nbytes):
raise NotImplementedError
async def sock_recv_into(self, sock, buf):
raise NotImplementedError
async def sock_recvfrom(self, sock, bufsize):
raise NotImplementedError
async def sock_recvfrom_into(self, sock, buf, nbytes=0):
raise NotImplementedError
async def sock_sendall(self, sock, data):
raise NotImplementedError
async def sock_sendto(self, sock, data, address):
raise NotImplementedError
async def sock_connect(self, sock, address):
raise NotImplementedError
async def sock_accept(self, sock):
raise NotImplementedError
async def sock_sendfile(self, sock, file, offset=0, count=None,
*, fallback=None):
raise NotImplementedError
def add_signal_handler(self, sig, callback, *args):
raise NotImplementedError
def remove_signal_handler(self, sig):
raise NotImplementedError
def set_task_factory(self, factory):
raise NotImplementedError
def get_task_factory(self):
raise NotImplementedError
def get_exception_handler(self):
raise NotImplementedError
def set_exception_handler(self, handler):
raise NotImplementedError
def default_exception_handler(self, context):
raise NotImplementedError
def set_debug(self, enabled):
raise NotImplementedError</code></pre>
</details>
<h3>Ancestors</h3>
<ul class="hlist">
<li>asyncio.events.AbstractEventLoop</li>
</ul>
<h3>Methods</h3>
<dl>
<dt id="spin_sdk.http.poll_loop.PollLoop.add_reader"><code class="name flex">
<span>def <span class="ident">add_reader</span></span>(<span>self, fd, callback, *args)</span>
</code></dt>
<dd>
<div class="desc"></div>
<details class="source">
<summary>
<span>Expand source code</span>
</summary>
<pre><code class="python">def add_reader(self, fd, callback, *args):
raise NotImplementedError</code></pre>
</details>
</dd>
<dt id="spin_sdk.http.poll_loop.PollLoop.add_signal_handler"><code class="name flex">
<span>def <span class="ident">add_signal_handler</span></span>(<span>self, sig, callback, *args)</span>
</code></dt>
<dd>
<div class="desc"></div>
<details class="source">
<summary>
<span>Expand source code</span>
</summary>
<pre><code class="python">def add_signal_handler(self, sig, callback, *args):
raise NotImplementedError</code></pre>
</details>
</dd>
<dt id="spin_sdk.http.poll_loop.PollLoop.add_writer"><code class="name flex">
<span>def <span class="ident">add_writer</span></span>(<span>self, fd, callback, *args)</span>
</code></dt>
<dd>
<div class="desc"></div>
<details class="source">
<summary>
<span>Expand source code</span>
</summary>
<pre><code class="python">def add_writer(self, fd, callback, *args):
raise NotImplementedError</code></pre>
</details>
</dd>
<dt id="spin_sdk.http.poll_loop.PollLoop.call_at"><code class="name flex">
<span>def <span class="ident">call_at</span></span>(<span>self, when, callback, *args, context=None)</span>
</code></dt>
<dd>
<div class="desc"></div>
<details class="source">
<summary>
<span>Expand source code</span>
</summary>
<pre><code class="python">def call_at(self, when, callback, *args, context=None):
raise NotImplementedError</code></pre>
</details>
</dd>
<dt id="spin_sdk.http.poll_loop.PollLoop.call_exception_handler"><code class="name flex">
<span>def <span class="ident">call_exception_handler</span></span>(<span>self, context)</span>
</code></dt>
<dd>
<div class="desc"></div>
<details class="source">
<summary>
<span>Expand source code</span>
</summary>
<pre><code class="python">def call_exception_handler(self, context):
self.exception = context.get('exception', None)</code></pre>
</details>
</dd>
<dt id="spin_sdk.http.poll_loop.PollLoop.call_later"><code class="name flex">
<span>def <span class="ident">call_later</span></span>(<span>self, delay, callback, *args, context=None)</span>
</code></dt>
<dd>
<div class="desc"></div>
<details class="source">
<summary>
<span>Expand source code</span>
</summary>
<pre><code class="python">def call_later(self, delay, callback, *args, context=None):
raise NotImplementedError</code></pre>
</details>
</dd>
<dt id="spin_sdk.http.poll_loop.PollLoop.call_soon"><code class="name flex">
<span>def <span class="ident">call_soon</span></span>(<span>self, callback, *args, context=None)</span>
</code></dt>
<dd>
<div class="desc"></div>
<details class="source">
<summary>
<span>Expand source code</span>
</summary>
<pre><code class="python">def call_soon(self, callback, *args, context=None):
handle = asyncio.Handle(callback, args, self, context)
self.handles.append(handle)
return handle</code></pre>
</details>
</dd>
<dt id="spin_sdk.http.poll_loop.PollLoop.call_soon_threadsafe"><code class="name flex">
<span>def <span class="ident">call_soon_threadsafe</span></span>(<span>self, callback, *args, context=None)</span>
</code></dt>
<dd>
<div class="desc"></div>
<details class="source">
<summary>
<span>Expand source code</span>
</summary>
<pre><code class="python">def call_soon_threadsafe(self, callback, *args, context=None):
raise NotImplementedError</code></pre>
</details>
</dd>
<dt id="spin_sdk.http.poll_loop.PollLoop.close"><code class="name flex">
<span>def <span class="ident">close</span></span>(<span>self)</span>
</code></dt>
<dd>
<div class="desc"><p>Close the loop.</p>
<p>The loop should not be running.</p>
<p>This is idempotent and irreversible.</p>
<p>No other methods should be called after this one.</p></div>
<details class="source">
<summary>
<span>Expand source code</span>
</summary>
<pre><code class="python">def close(self):
self.running = False</code></pre>
</details>
</dd>
<dt id="spin_sdk.http.poll_loop.PollLoop.connect_accepted_socket"><code class="name flex">
<span>async def <span class="ident">connect_accepted_socket</span></span>(<span>self, protocol_factory, sock, *, ssl=None, ssl_handshake_timeout=None, ssl_shutdown_timeout=None)</span>
</code></dt>
<dd>
<div class="desc"><p>Handle an accepted connection.</p>
<p>This is used by servers that accept connections outside of
asyncio, but use asyncio to handle connections.</p>
<p>This method is a coroutine.
When completed, the coroutine
returns a (transport, protocol) pair.</p></div>
<details class="source">
<summary>
<span>Expand source code</span>
</summary>
<pre><code class="python">async def connect_accepted_socket(
self, protocol_factory, sock,
*, ssl=None,
ssl_handshake_timeout=None,
ssl_shutdown_timeout=None):
raise NotImplementedError</code></pre>
</details>
</dd>
<dt id="spin_sdk.http.poll_loop.PollLoop.connect_read_pipe"><code class="name flex">
<span>async def <span class="ident">connect_read_pipe</span></span>(<span>self, protocol_factory, pipe)</span>
</code></dt>
<dd>
<div class="desc"><p>Register read pipe in event loop. Set the pipe to non-blocking mode.</p>
<p>protocol_factory should instantiate object with Protocol interface.
pipe is a file-like object.
Return pair (transport, protocol), where transport supports the
ReadTransport interface.</p></div>
<details class="source">
<summary>
<span>Expand source code</span>
</summary>
<pre><code class="python">async def connect_read_pipe(self, protocol_factory, pipe):
raise NotImplementedError</code></pre>
</details>
</dd>
<dt id="spin_sdk.http.poll_loop.PollLoop.connect_write_pipe"><code class="name flex">
<span>async def <span class="ident">connect_write_pipe</span></span>(<span>self, protocol_factory, pipe)</span>
</code></dt>
<dd>
<div class="desc"><p>Register write pipe in event loop.</p>
<p>protocol_factory should instantiate object with BaseProtocol interface.
Pipe is file-like object already switched to nonblocking.
Return pair (transport, protocol), where transport support
WriteTransport interface.</p></div>
<details class="source">
<summary>
<span>Expand source code</span>
</summary>
<pre><code class="python">async def connect_write_pipe(self, protocol_factory, pipe):
raise NotImplementedError</code></pre>
</details>
</dd>
<dt id="spin_sdk.http.poll_loop.PollLoop.create_connection"><code class="name flex">
<span>async def <span class="ident">create_connection</span></span>(<span>self, protocol_factory, host=None, port=None, *, ssl=None, family=0, proto=0, flags=0, sock=None, local_addr=None, server_hostname=None, ssl_handshake_timeout=None, ssl_shutdown_timeout=None, happy_eyeballs_delay=None, interleave=None)</span>
</code></dt>
<dd>
<div class="desc"></div>
<details class="source">
<summary>
<span>Expand source code</span>
</summary>
<pre><code class="python">async def create_connection(
self, protocol_factory, host=None, port=None,
*, ssl=None, family=0, proto=0,
flags=0, sock=None, local_addr=None,
server_hostname=None,
ssl_handshake_timeout=None,
ssl_shutdown_timeout=None,
happy_eyeballs_delay=None, interleave=None):
raise NotImplementedError</code></pre>
</details>
</dd>
<dt id="spin_sdk.http.poll_loop.PollLoop.create_datagram_endpoint"><code class="name flex">
<span>async def <span class="ident">create_datagram_endpoint</span></span>(<span>self, protocol_factory, local_addr=None, remote_addr=None, *, family=0, proto=0, flags=0, reuse_address=None, reuse_port=None, allow_broadcast=None, sock=None)</span>
</code></dt>
<dd>
<div class="desc"><p>A coroutine which creates a datagram endpoint.</p>
<p>This method will try to establish the endpoint in the background.
When successful, the coroutine returns a (transport, protocol) pair.</p>
<p>protocol_factory must be a callable returning a protocol instance.</p>
<p>socket family AF_INET, socket.AF_INET6 or socket.AF_UNIX depending on
host (or family if specified), socket type SOCK_DGRAM.</p>
<p>reuse_address tells the kernel to reuse a local socket in
TIME_WAIT state, without waiting for its natural timeout to
expire. If not specified it will automatically be set to True on
UNIX.</p>
<p>reuse_port tells the kernel to allow this endpoint to be bound to
the same port as other existing endpoints are bound to, so long as
they all set this flag when being created. This option is not
supported on Windows and some UNIX's. If the
:py:data:<code>~socket.SO_REUSEPORT</code> constant is not defined then this
capability is unsupported.</p>
<p>allow_broadcast tells the kernel to allow this endpoint to send
messages to the broadcast address.</p>
<p>sock can optionally be specified in order to use a preexisting
socket object.</p></div>
<details class="source">
<summary>
<span>Expand source code</span>
</summary>
<pre><code class="python">async def create_datagram_endpoint(self, protocol_factory,
local_addr=None, remote_addr=None, *,
family=0, proto=0, flags=0,
reuse_address=None, reuse_port=None,
allow_broadcast=None, sock=None):
raise NotImplementedError</code></pre>
</details>
</dd>
<dt id="spin_sdk.http.poll_loop.PollLoop.create_future"><code class="name flex">
<span>def <span class="ident">create_future</span></span>(<span>self)</span>
</code></dt>
<dd>
<div class="desc"></div>
<details class="source">
<summary>
<span>Expand source code</span>
</summary>
<pre><code class="python">def create_future(self):
return asyncio.Future(loop=self)</code></pre>
</details>
</dd>
<dt id="spin_sdk.http.poll_loop.PollLoop.create_server"><code class="name flex">
<span>async def <span class="ident">create_server</span></span>(<span>self, protocol_factory, host=None, port=None, *, family=0, flags=1, sock=None, backlog=100, ssl=None, reuse_address=None, reuse_port=None, ssl_handshake_timeout=None, ssl_shutdown_timeout=None, start_serving=True)</span>
</code></dt>
<dd>
<div class="desc"><p>A coroutine which creates a TCP server bound to host and port.</p>
<p>The return value is a Server object which can be used to stop
the service.</p>
<p>If host is an empty string or None all interfaces are assumed
and a list of multiple sockets will be returned (most likely
one for IPv4 and another one for IPv6). The host parameter can also be
a sequence (e.g. list) of hosts to bind to.</p>
<p>family can be set to either AF_INET or AF_INET6 to force the
socket to use IPv4 or IPv6. If not set it will be determined
from host (defaults to AF_UNSPEC).</p>
<p>flags is a bitmask for getaddrinfo().</p>
<p>sock can optionally be specified in order to use a preexisting
socket object.</p>
<p>backlog is the maximum number of queued connections passed to
listen() (defaults to 100).</p>
<p>ssl can be set to an SSLContext to enable SSL over the