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a _�hqy � @ s d Z ddlZddlZddlZddlmZ ddlZddlZddl Z ddl m Z ddl m Z ddl Z ddlZddlmZmZmZmZmZmZ ddlmZ ddlmZ dd lmZ ddl Z dd l m Z m Z m Z m Z m!Z!m"Z"m#Z#m$Z$ e j%r�dd l m&Z&m'Z'm(Z(m)Z)m*Z* e �+d �Z,e de#e e# e$e e#f ej-jf Z.G d d� de/�Z0G dd� de/�Z1G dd� de/�Z2G dd� de/�Z3G dd� de/�Z4e e5df e d�dd�Z6ed�d d �Z7e d e d d �d!d"�Z8e e9d �d#d$�Z:G d%d� de/�Z;G d&d'� d'e<�Z=dCe e e. e$e e.f f d)d*d+�d,d-�Z>e>Z?dDe e e. e$e e.f f d)d*d+�d.d/�Z@e ed0�d1d2�ZAdEe eBejCf e.d)ed3�d4d5�ZDeBd6d7�d8d9�ZEG d:d;� d;e<�ZFe �GeeF� �ZHe �GeeF� �ZId<eI_ G d=d>� d>e<�ZJz ejKZLW n eM�y� eNed?�ZLY n0 e.ed@�dAdB�ZOe eO�ZOdS )Fa` ``tornado.gen`` implements generator-based coroutines. .. note:: The "decorator and generator" approach in this module is a precursor to native coroutines (using ``async def`` and ``await``) which were introduced in Python 3.5. Applications that do not require compatibility with older versions of Python should use native coroutines instead. Some parts of this module are still useful with native coroutines, notably `multi`, `sleep`, `WaitIterator`, and `with_timeout`. Some of these functions have counterparts in the `asyncio` module which may be used as well, although the two may not necessarily be 100% compatible. Coroutines provide an easier way to work in an asynchronous environment than chaining callbacks. Code using coroutines is technically asynchronous, but it is written as a single generator instead of a collection of separate functions. For example, here's a coroutine-based handler: .. testcode:: class GenAsyncHandler(RequestHandler): @gen.coroutine def get(self): http_client = AsyncHTTPClient() response = yield http_client.fetch("http://example.com") do_something_with_response(response) self.render("template.html") .. testoutput:: :hide: Asynchronous functions in Tornado return an ``Awaitable`` or `.Future`; yielding this object returns its result. You can also yield a list or dict of other yieldable objects, which will be started at the same time and run in parallel; a list or dict of results will be returned when they are all finished: .. testcode:: @gen.coroutine def get(self): http_client = AsyncHTTPClient() response1, response2 = yield [http_client.fetch(url1), http_client.fetch(url2)] response_dict = yield dict(response3=http_client.fetch(url3), response4=http_client.fetch(url4)) response3 = response_dict['response3'] response4 = response_dict['response4'] .. testoutput:: :hide: If ``tornado.platform.twisted`` is imported, it is also possible to yield Twisted's ``Deferred`` objects. See the `convert_yielded` function to extend this mechanism. .. versionchanged:: 3.2 Dict support added. .. versionchanged:: 4.1 Support added for yielding ``asyncio`` Futures and Twisted Deferreds via ``singledispatch``. � N)� Generator)�singledispatch)� isawaitable)�Future� is_future� chain_future�future_set_exc_info�future_add_done_callback�"future_set_result_unless_cancelled)�IOLoop)�app_log)� TimeoutError)�Union�Any�Callable�List�Type�Tuple� Awaitable�Dict)�Sequence�Deque�Optional�Set�Iterable�_Tc @ s e Zd ZdS )� KeyReuseErrorN��__name__� __module__� __qualname__� r! r! �{/root/rpmbuild/BUILDROOT/imh-python39-modules-3.9.7-92.el8.x86_64/opt/imh-python/lib/python3.9/site-packages/tornado/gen.pyr j s r c @ s e Zd ZdS )�UnknownKeyErrorNr r! r! r! r" r# n s r# c @ s e Zd ZdS )�LeakedCallbackErrorNr r! r! r! r" r$ r s r$ c @ s e Zd ZdS )� BadYieldErrorNr r! r! r! r" r% v s r% c @ s e Zd ZdS )�ReturnValueIgnoredErrorNr r! r! r! r" r& z s r& �Return)�e�returnc C sF z| j W S ty Y n0 z | jd W S ttfy@ Y d S 0 d S )Nr )�value�AttributeError�args� IndexError)r( r! r! r" �_value_from_stopiteration~ s r. �r) c C s: t � } t| dd�}|r6|d d }|tkr6|d= qq6q| S )NZ_source_tracebackr! ���r )r �getattr�__file__)�futureZsource_traceback�filenamer! r! r" �_create_future� s r5 ).zGenerator[Any, Any, _T]).� Future[_T])�funcr) c s& t �� �� fdd��}� |_d|_|S )a> Decorator for asynchronous generators. For compatibility with older versions of Python, coroutines may also "return" by raising the special exception `Return(value) <Return>`. Functions with this decorator return a `.Future`. .. warning:: When exceptions occur inside a coroutine, the exception information will be stored in the `.Future` object. You must examine the result of the `.Future` object, or the exception may go unnoticed by your code. This means yielding the function if called from another coroutine, using something like `.IOLoop.run_sync` for top-level calls, or passing the `.Future` to `.IOLoop.add_future`. .. versionchanged:: 6.0 The ``callback`` argument was removed. Use the returned awaitable object instead. c s. t � }z�| i |��}W nd ttfyH } zt|�}W Y d }~n�d }~0 ty| t|t�� � z|W d } Y S d }0 Y n�0 t|t ��r z t |�}W nT ttfy� } zt |t|�� W Y d }~nFd }~0 ty� t|t�� � Y n 0 t |||�� |� � fdd�� d }z |W d }S d }0 t ||� |S )Nc s � S �Nr! )�_��runnerr! r" �<lambda>� � z,coroutine.<locals>.wrapper.<locals>.<lambda>)r5 r' � StopIterationr. � Exceptionr �sys�exc_info� isinstancer �nextr �RunnerZadd_done_callback)r, �kwargsr3 �resultr( �yielded�r7 r: r" �wrapper� s> � � � zcoroutine.<locals>.wrapperT)� functools�wraps� __wrapped__�__tornado_coroutine__)r7 rI r! rH r" � coroutine� s :rN c C s t | dd�S )z�Return whether *func* is a coroutine function, i.e. a function wrapped with `~.gen.coroutine`. .. versionadded:: 4.5 rM F)r1 rH r! r! r" �is_coroutine_function� s rO c s* e Zd ZdZdedd�� fdd� Z� ZS )r' a� Special exception to return a value from a `coroutine`. If this exception is raised, its value argument is used as the result of the coroutine:: @gen.coroutine def fetch_json(url): response = yield AsyncHTTPClient().fetch(url) raise gen.Return(json_decode(response.body)) In Python 3.3, this exception is no longer necessary: the ``return`` statement can be used directly to return a value (previously ``yield`` and ``return`` with a value could not be combined in the same function). By analogy with the return statement, the value argument is optional, but it is never necessary to ``raise gen.Return()``. The ``return`` statement can be used with no arguments instead. N)r* r) c s t t| ��� || _|f| _d S r8 )�superr' �__init__r* r, )�selfr* �� __class__r! r" rQ s zReturn.__init__)N)r r r �__doc__r rQ � __classcell__r! r! rS r" r' s c @ s� e Zd ZdZi Zeedd�dd�Zed�dd�Zed�d d �Z edd �d d �Z edd �dd�Z e j d�dd�Zed�dd�ZdS )� WaitIteratora� Provides an iterator to yield the results of awaitables as they finish. Yielding a set of awaitables like this: ``results = yield [awaitable1, awaitable2]`` pauses the coroutine until both ``awaitable1`` and ``awaitable2`` return, and then restarts the coroutine with the results of both awaitables. If either awaitable raises an exception, the expression will raise that exception and all the results will be lost. If you need to get the result of each awaitable as soon as possible, or if you need the result of some awaitables even if others produce errors, you can use ``WaitIterator``:: wait_iterator = gen.WaitIterator(awaitable1, awaitable2) while not wait_iterator.done(): try: result = yield wait_iterator.next() except Exception as e: print("Error {} from {}".format(e, wait_iterator.current_future)) else: print("Result {} received from {} at {}".format( result, wait_iterator.current_future, wait_iterator.current_index)) Because results are returned as soon as they are available the output from the iterator *will not be in the same order as the input arguments*. If you need to know which future produced the current result, you can use the attributes ``WaitIterator.current_future``, or ``WaitIterator.current_index`` to get the index of the awaitable from the input list. (if keyword arguments were used in the construction of the `WaitIterator`, ``current_index`` will use the corresponding keyword). On Python 3.5, `WaitIterator` implements the async iterator protocol, so it can be used with the ``async for`` statement (note that in this version the entire iteration is aborted if any value raises an exception, while the previous example can continue past individual errors):: async for result in gen.WaitIterator(future1, future2): print("Result {} received from {} at {}".format( result, wait_iterator.current_future, wait_iterator.current_index)) .. versionadded:: 4.1 .. versionchanged:: 4.3 Added ``async for`` support in Python 3.5. N)r, rE r) c O s� |r|rt d��|r:tdd� |�� D ��| _t|�� �}n tdd� t|�D ��| _|}t�� | _ d | _ d | _ d | _ |D ]}t || j� qvd S )Nz)You must provide args or kwargs, not bothc s s | ]\}}||fV qd S r8 r! )�.0�k�fr! r! r" � <genexpr>[ r= z(WaitIterator.__init__.<locals>.<genexpr>c s s | ]\}}||fV qd S r8 r! )rX �irZ r! r! r" r[ ^ r= )� ValueError�dict�items� _unfinished�list�values� enumerate� collections�deque� _finished� current_index�current_future�_running_futurer �_done_callback)rR r, rE �futuresr3 r! r! r" rQ V s zWaitIterator.__init__r/ c C s | j s | jrdS d | _| _dS )z2Returns True if this iterator has no more results.FNT)rf r` rg rh �rR r! r! r" �donei s zWaitIterator.donec C s$ t � | _| jr | �| j�� � | jS )z�Returns a `.Future` that will yield the next available result. Note that this `.Future` will not be the same object as any of the inputs. )r ri rf �_return_result�popleftrl r! r! r" rC q s zWaitIterator.next)rm r) c C s, | j r | j �� s | �|� n | j�|� d S r8 )ri rm rn rf �append�rR rm r! r! r" rj ~ s zWaitIterator._done_callbackc C s6 | j du rtd��t|| j � || _| j�|�| _dS )z�Called set the returned future's state that of the future we yielded, and set the current future for the iterator. Nzno future is running)ri r? r rh r` �poprg rq r! r! r" rn � s zWaitIterator._return_resultc C s | S r8 r! rl r! r! r" � __aiter__� s zWaitIterator.__aiter__c C s | � � rttd�� �| �� S )N�StopAsyncIteration)rm r1 �builtinsrC rl r! r! r" � __anext__� s zWaitIterator.__anext__)r r r rU r` r rQ �boolrm rC rj rn �typing� AsyncIteratorrs rv r! r! r! r" rW s 6 rW r! z3Union[Type[Exception], Tuple[Type[Exception], ...]]z!Union[Future[List], Future[Dict]])�children�quiet_exceptionsr) c C s t | |d�S )a Runs multiple asynchronous operations in parallel. ``children`` may either be a list or a dict whose values are yieldable objects. ``multi()`` returns a new yieldable object that resolves to a parallel structure containing their results. If ``children`` is a list, the result is a list of results in the same order; if it is a dict, the result is a dict with the same keys. That is, ``results = yield multi(list_of_futures)`` is equivalent to:: results = [] for future in list_of_futures: results.append(yield future) If any children raise exceptions, ``multi()`` will raise the first one. All others will be logged, unless they are of types contained in the ``quiet_exceptions`` argument. In a ``yield``-based coroutine, it is not normally necessary to call this function directly, since the coroutine runner will do it automatically when a list or dict is yielded. However, it is necessary in ``await``-based coroutines, or to pass the ``quiet_exceptions`` argument. This function is available under the names ``multi()`` and ``Multi()`` for historical reasons. Cancelling a `.Future` returned by ``multi()`` does not cancel its children. `asyncio.gather` is similar to ``multi()``, but it does cancel its children. .. versionchanged:: 4.2 If multiple yieldables fail, any exceptions after the first (which is raised) will be logged. Added the ``quiet_exceptions`` argument to suppress this logging for selected exception types. .. versionchanged:: 4.3 Replaced the class ``Multi`` and the function ``multi_future`` with a unified function ``multi``. Added support for yieldables other than ``YieldPoint`` and `.Future`. �r{ )� multi_future)rz r{ r! r! r" �multi� s 0r~ c s� t | t�r t| �� ��| �� }nd�| }ttt|��� tdd� � D ��sLJ �t� ��t � �� stt ��durni ng � t dd�� ����fdd� }t� }� D ] }||vr�|� |� t ||� q��S )a� Wait for multiple asynchronous futures in parallel. Since Tornado 6.0, this function is exactly the same as `multi`. .. versionadded:: 4.0 .. versionchanged:: 4.2 If multiple ``Futures`` fail, any exceptions after the first (which is raised) will be logged. Added the ``quiet_exceptions`` argument to suppress this logging for selected exception types. .. deprecated:: 4.3 Use `multi` instead. Nc s s | ]}t |�pt|t�V qd S r8 )r rB � _NullFuture)rX r\ r! r! r" r[ � r= z multi_future.<locals>.<genexpr>)�futr) c s� �� | � �s�g }� D ]l}z|�|�� � W q ty� } z<��� r^t|��sltjddd� nt�t � � � W Y d }~qd }~0 0 q��� s��d ur�t �t t �|��� n t �|� d S )Nz!Multiple exceptions in yield listT�rA )�removerp rF r? rm rB r �errorr r@ rA r r^ �zip)r� Z result_listrZ r( �Z children_futsr3 �keysr{ Zunfinished_childrenr! r" �callback� s& �&�z multi_future.<locals>.callback)rB r^ ra r� rb �map�convert_yielded�all�setr5 r r �addr )rz r{ Z children_seqr� Z listeningrZ r! r� r" r} � s$ r} )�xr) c C s$ t | �r | S t� }|�| � |S dS )a Converts ``x`` into a `.Future`. If ``x`` is already a `.Future`, it is simply returned; otherwise it is wrapped in a new `.Future`. This is suitable for use as ``result = yield gen.maybe_future(f())`` when you don't know whether ``f()`` returns a `.Future` or not. .. deprecated:: 4.3 This function only handles ``Futures``, not other yieldable objects. Instead of `maybe_future`, check for the non-future result types you expect (often just ``None``), and ``yield`` anything unknown. N)r r5 Z set_result)r� r� r! r! r" � maybe_future s r� )�timeoutr3 r{ r) c s� t |��t� �t��� t�� �tdd��fdd� � dd�� ��fdd� }��| |��t�t�rvt���fdd �� n�� ���fd d �� �S ) ae Wraps a `.Future` (or other yieldable object) in a timeout. Raises `tornado.util.TimeoutError` if the input future does not complete before ``timeout``, which may be specified in any form allowed by `.IOLoop.add_timeout` (i.e. a `datetime.timedelta` or an absolute time relative to `.IOLoop.time`) If the wrapped `.Future` fails after it has timed out, the exception will be logged unless it is either of a type contained in ``quiet_exceptions`` (which may be an exception type or a sequence of types), or an ``asyncio.CancelledError``. The wrapped `.Future` is not canceled when the timeout expires, permitting it to be reused. `asyncio.wait_for` is similar to this function but it does cancel the wrapped `.Future` on timeout. .. versionadded:: 4.0 .. versionchanged:: 4.1 Added the ``quiet_exceptions`` argument and the logging of unhandled exceptions. .. versionchanged:: 4.4 Added support for yieldable objects other than `.Future`. .. versionchanged:: 6.0.3 ``asyncio.CancelledError`` is now always considered "quiet". N)r3 r) c sb z | � � W nP tjy Y n> ty\ } z&t|� �sHtjd| dd� W Y d }~n d }~0 0 d S )Nz$Exception in Future %r after timeoutTr� )rF �asyncioZCancelledErrorr? rB r r� )r3 r( r| r! r" �error_callbackO s �z$with_timeout.<locals>.error_callbackr/ c s$ �� � s��td�� t�� � d S )N�Timeout)rm Z set_exceptionr r r! )r� �future_convertedrF r! r" �timeout_callbackZ s z&with_timeout.<locals>.timeout_callbackc s � � ��S r8 �Zremove_timeout�r3 ��io_loop�timeout_handler! r" r< f r= z with_timeout.<locals>.<lambda>c s � � ��S r8 r� r� r� r! r" r< l r= ) r� r5 r r �currentr Z add_timeoutrB r � add_future)r� r3 r{ r� r! )r� r� r� r{ rF r� r" � with_timeout# s ' ��r� z Future[None])�durationr) c s" t � � t�� �| � fdd�� � S )a� Return a `.Future` that resolves after the given number of seconds. When used with ``yield`` in a coroutine, this is a non-blocking analogue to `time.sleep` (which should not be used in coroutines because it is blocking):: yield gen.sleep(0.5) Note that calling this function on its own does nothing; you must wait on the `.Future` it returns (usually by yielding it). .. versionadded:: 4.1 c s t � d �S r8 )r r! �rZ r! r" r< � r= zsleep.<locals>.<lambda>)r5 r r� Z call_later)r� r! r� r" �sleepq s �r� c @ s, e Zd ZdZdd�dd�Zed�dd�ZdS )r a� _NullFuture resembles a Future that finished with a result of None. It's not actually a `Future` to avoid depending on a particular event loop. Handled as a special case in the coroutine runner. We lie and tell the type checker that a _NullFuture is a Future so we don't have to leak _NullFuture into lots of public APIs. But this means that the type checker can't warn us when we're passing a _NullFuture into a code path that doesn't understand what to do with it. Nr/ c C s d S r8 r! rl r! r! r" rF � s z_NullFuture.resultc C s dS )NTr! rl r! r! r" rm � s z_NullFuture.done)r r r rU rF rw rm r! r! r! r" r � s r a� A special object which may be yielded to allow the IOLoop to run for one iteration. This is not needed in normal use but it can be helpful in long-running coroutines that are likely to yield Futures that are ready instantly. Usage: ``yield gen.moment`` In native coroutines, the equivalent of ``yield gen.moment`` is ``await asyncio.sleep(0)``. .. versionadded:: 4.0 .. deprecated:: 4.5 ``yield None`` (or ``yield`` with no argument) is now equivalent to ``yield gen.moment``. c @ s\ e Zd ZdZddedd�dd�Zdd�d d �Zeed �d d �Ze e e e j ed�dd�Z dS )rD z�Internal implementation of `tornado.gen.coroutine`. Maintains information about pending callbacks and their results. The results of the generator are stored in ``result_future`` (a `.Future`) z Generator[_Yieldable, Any, _T]r6 N)�gen� result_future� first_yieldedr) c C sJ || _ || _t| _d| _d| _t�� | _| � |�rFd } }}| � � d S )NF) r� r� � _null_futurer3 �running�finishedr r� r� � handle_yield�run)rR r� r� r� r! r! r" rQ � s zRunner.__init__r/ c C sz | j s | jrdS �zZd| _ | j}|du r0td��|�� sDW d| _ dS d| _zfd}z |�� }W n tyv t�� }Y n0 d}|dur�z| jj |� }W d}q�d}0 n | j� |�}W n� t t f�y } z8d| _t | _t| jt|�� d| _W Y d}~W d| _ dS d}~0 t�yD d| _t | _t| jt�� � d| _Y W d| _ dS 0 | �|��s^W d| _ dS d}qW d| _ nd| _ 0 dS )zkStarts or resumes the generator, running until it reaches a yield point that is not ready. NTzNo pending futureF)r� r� r3 r? rm rF r@ rA r� �throw�sendr> r' r� r r� r. r r� )rR r3 rA r* rG r( r! r! r" r� � s` '� � � � �z Runner.run�rG r) c s� zt |�� _W n* ty8 t� � _t� jt�� � Y n0 � jtu rV� j� � j � dS � jd u rjt d��n2� j� � s�t d d�� fdd� }� j�� j|� dS dS )NFzno pending future)rZ r) c s d } � � � d S r8 )r� r� rl r! r" �inner s z"Runner.handle_yield.<locals>.innerT)r� r3 r% r r r@ rA �momentr� Z add_callbackr� r? rm r r� )rR rG r� r! rl r" r� s zRunner.handle_yield)�typr* �tbr) c C s: | j s2| js2t� | _t| j|||f� | �� dS dS d S )NTF)r� r� r r3 r r� )rR r� r* r� r! r! r" �handle_exception s zRunner.handle_exception)r r r rU � _YieldablerQ r� rw r� r r? �types� TracebackTyper� r! r! r! r" rD � s � 6 �rD �asyncr� c C sl | du s| t u rt S | tu r tS t| ttf�r6t| �S t| �rJt�t | �S t | �rZt | �S t d| f ��dS )a? Convert a yielded object into a `.Future`. The default implementation accepts lists, dictionaries, and Futures. This has the side effect of starting any coroutines that did not start themselves, similar to `asyncio.ensure_future`. If the `~functools.singledispatch` library is available, this function may be extended to support additional types. For example:: @convert_yielded.register(asyncio.Future) def _(asyncio_future): return tornado.platform.asyncio.to_tornado_future(asyncio_future) .. versionadded:: 4.1 Nzyielded unknown object %r) r� r� rB ra r^ r~ r rx �castr r �_wrap_awaitabler% )rG r! r! r" r� . s r� )r! )r! )r! )PrU r� ru rd �collections.abcr �concurrent.futuresZ concurrent�datetimerJ r �inspectr r@ r� Ztornado.concurrentr r r r r r Ztornado.ioloopr Z tornado.logr Z tornado.utilr rx r r r r r r r r � TYPE_CHECKINGr r r r r �TypeVarr rk r� r? r r# r$ r% r& r> r. r5 rN rw rO r' �objectrW r~ ZMultir} r� �float� timedeltar� r� r r� r� r� rD Z ensure_futurer� r+ r1 r� r! r! r! r" �<module> s� D ( �� \ ~ �� 3 �� ? � � Ns
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