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This index starts at zero :type num_parts: int :param num_parts: The total number of parts in the transfer :returns: The value to use for Range parameter on downloads or the CopySourceRange parameter for copies � r Nz bytes=%s-%s)�str)r' Z part_index� num_partsZ total_sizeZ start_rangeZ end_rangeZ range_paramr r r �calculate_range_parameterE s r, c C sD g }| j jjD ]0}d| }t||�r|�tjt||�| d�� q|S )a Retrieves callbacks from a subscriber :type transfer_future: s3transfer.futures.TransferFuture :param transfer_future: The transfer future the subscriber is associated to. :type callback_type: str :param callback_type: The type of callback to retrieve from the subscriber. Valid types include: * 'queued' * 'progress' * 'done' :returns: A list of callbacks for the type specified. All callbacks are preinjected with the transfer future. Zon_)�future)�metaZ call_argsZ subscribersr �append� functools�partial�getattr)Ztransfer_futureZ callback_type� callbacks� subscriberZ callback_namer r r � get_callbacksb s ��r5 c C s |r| D ]}||d� qdS )a� Calls all progress callbacks :param callbacks: A list of progress callbacks to invoke :param bytes_transferred: The number of bytes transferred. This is passed to the callbacks. If no bytes were transferred the callbacks will not be invoked because no progress was achieved. 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It cannot dip below zeror) N)rS rU rZ rV rT rL r r r � decrement� s �z CountCallbackInvoker.decrementc C sB | j �( d| _| jdkr | �� W d � n1 s40 Y dS )z�Finalize the counter Once finalized, the counter never be incremented and the callback can be invoked once the count reaches zero Tr N)rS rV rU rT rL r r r �finalize� s z CountCallbackInvoker.finalizeN) rC rD rE rO rB �propertyrY r[ r\ r] r r r r rP � s rP c @ sZ e Zd ZdZdd� Zdd� Zddd�Zd d � Zd d � Zd d� Z dd� Z dd� Z dd� Z dS )�OSUtils� c C s t j�|�S r )�os�path�getsize�r@ �filenamer r r � get_file_size� s zOSUtils.get_file_sizec C s t j||||dd�S )NF)�enable_callbacks)� ReadFileChunk� from_filename)r@ re � start_byter& r3 r r r �open_file_chunk_reader� s �z OSUtils.open_file_chunk_readerNc C s t ||||d|d�S )NF)r3 rg �close_callbacks)rh )r@ �fileobj� chunk_size�full_file_sizer3 rl r r r �#open_file_chunk_reader_from_fileobj� s �z+OSUtils.open_file_chunk_reader_from_fileobjc C s t ||�S r )�open)r@ re �moder r r rq s z OSUtils.openc C s& zt �|� W n ty Y n0 dS )z+Remove a file, noop if file does not exist.N)ra �remove�OSErrorrd r r r � remove_file s zOSUtils.remove_filec C s t ||� d S r r )r@ Zcurrent_filenameZ new_filenamer r r r s zOSUtils.rename_filec C sX t j�|�sdS t �|�j}t�|�r*dS t�|�r8dS t�|�rFdS t�|�rTdS dS )a Checks to see if a file is a special UNIX file. 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The file gets opened in the following methods: ``read()``, ``seek()``, and ``__enter__()`` :type filename: str :param filename: The name of the file to open :type start_byte: int :param start_byte: The byte to seek to when the file is opened. :type mode: str :param mode: The mode to use to open the file :type open_function: function :param open_function: The function to use to open the file N)� _filename�_fileobj� _start_byte�_mode�_open_function)r@ re rj rr Z open_functionr r r rB A s zDeferredOpenFile.__init__c C s8 | j d u r4| �| j| j�| _ | jdkr4| j �| j� d S �Nr )r� r� r� r� r� �seekrL r r r �_open_if_needed\ s z DeferredOpenFile._open_if_neededc C s | j S r )r� rL r r r r� b s zDeferredOpenFile.nameNc C s | � � | j�|�S r )r� r� �read)r@ �amountr r r r� f s zDeferredOpenFile.readc C s | � � | j�|� d S r )r� r� �write)r@ �datar r r r� j s zDeferredOpenFile.writec C s | � � | j�||� d S r )r� r� r� )r@ �where�whencer r r r� n s zDeferredOpenFile.seekc C s | j d u r| jS | j �� S r )r� r� �tellrL r r r r� r s zDeferredOpenFile.tellc C s | j r| j �� d S r )r� �closerL r r r r� w s zDeferredOpenFile.closec C s | � � | S r )r� rL r r r � __enter__{ s zDeferredOpenFile.__enter__c O s | � � d S r �r� �r@ rK r r r r �__exit__ s zDeferredOpenFile.__exit__)N)r )rC rD rE rq rB r� r^ r� r� r� r� r� r� r� r� r r r r r� @ s r� c @ s� e Zd Zd"dd�Zed#dd��Zdd� Zd$d d �Zd d � Zd d� Z dd� Z dd� Z d%dd�Z dd� Z dd� Zdd� Zd d � Zd d � Zd d!� ZdS )&rh NTc C sb || _ | j �� | _| j| j || j|d�| _d| _|| _|du rDg | _|| _|| _|du r^|| _dS )a� Given a file object shown below:: |___________________________________________________| 0 | | full_file_size |----chunk_size---| f.tell() :type fileobj: file :param fileobj: File like object :type chunk_size: int :param chunk_size: The max chunk size to read. Trying to read pass the end of the chunk size will behave like you've reached the end of the file. :type full_file_size: int :param full_file_size: The entire content length associated with ``fileobj``. :type callbacks: A list of function(amount_read) :param callbacks: Called whenever data is read from this object in the order provided. :type enable_callbacks: boolean :param enable_callbacks: True if to run callbacks. Otherwise, do not run callbacks :type close_callbacks: A list of function() :param close_callbacks: Called when close is called. The function should take no arguments. )�requested_sizerj �actual_file_sizer N) r� r� r� �_calculate_file_size�_size� _amount_read� _callbacks�_callbacks_enabled�_close_callbacks)r@ rm rn ro r3 rg rl r r r rB � s # �zReadFileChunk.__init__c C s4 t |d�}|�|� t�|�� �j}| |||||�S )a[ Convenience factory function to create from a filename. :type start_byte: int :param start_byte: The first byte from which to start reading. :type chunk_size: int :param chunk_size: The max chunk size to read. Trying to read pass the end of the chunk size will behave like you've reached the end of the file. :type full_file_size: int :param full_file_size: The entire content length associated with ``fileobj``. :type callbacks: function(amount_read) :param callbacks: Called whenever data is read from this object. :type enable_callbacks: bool :param enable_callbacks: Indicate whether to invoke callback during read() calls. :rtype: ``ReadFileChunk`` :return: A new instance of ``ReadFileChunk`` r� )rq r� ra �fstat�fileno�st_size)r} re rj rn r3 rg r� � file_sizer r r ri � s zReadFileChunk.from_filenamec C s || }t ||�S r )�min)r@ rm r� rj r� Zmax_chunk_sizer r r r� � s z"ReadFileChunk._calculate_file_sizec C sl t | j| j d�}|d u r |}n t||�}| j�|�}| jt|�7 _| jd urh| jrht | jt|�� |S r� ) �maxr� r� r� r� r� r� r� r� r9 )r@ r� Z amount_leftZamount_to_readr� r r r r� � s zReadFileChunk.readc C s" | � � t| jd�r | j�� d S )Nr! )�enable_callbackr r� r! rL r r r r! � s z!ReadFileChunk.signal_transferringc C s" | � � t| jd�r | j�� d S )Nr )�disable_callbackr r� r rL r r r r � s z%ReadFileChunk.signal_not_transferringc C s d| _ d S )NT�r� rL r r r r� � s z ReadFileChunk.enable_callbackc C s d| _ d S )NFr� rL r r r r� � s z ReadFileChunk.disable_callbackr c C s� |dvrt d| ��|| j7 }|dkr2|| j7 }n|dkrD|| j7 }| j�t|| j�� | jd ur�| jr�tt || j | j�d�}t | j| j�}|| }t | j|d� t|| j d�| _d S )N)r r) � z(invalid whence (%s, should be 0, 1 or 2)r) r� r r6 ) � ValueErrorr� r� r� r� r� r� r� r� r� r9 )r@ r� r� Z bounded_whereZbounded_amount_readr� r r r r� � s$ � �zReadFileChunk.seekc C s0 | j d ur"| jr"| j D ] }|� q| j�� d S r )r� r� r� r� rW r r r r� s zReadFileChunk.closec C s | j S r )r� rL r r r r� s zReadFileChunk.tellc C s | j S r )r� rL r r r �__len__ s zReadFileChunk.__len__c C s | S r r rL r r r r� " s zReadFileChunk.__enter__c O s | � � d S r r� r� r r r r� % s zReadFileChunk.__exit__c C s t g �S r )�iterrL r r r �__iter__( s zReadFileChunk.__iter__)NTN)NT)N)r )rC rD rE rB � classmethodri r� r� r! r r� r� r� r� r� r� r� r� r� r r r r rh � s& � 3 � rh c @ s" e Zd ZdZddd�Zdd� ZdS )�StreamReaderProgressz<Wrapper for a read only stream that adds progress callbacks.Nc C s || _ || _|d u rg | _d S r )�_streamr� )r@ �streamr3 r r r rB 3 s z StreamReaderProgress.__init__c O s& | j j|i |��}t| jt|�� |S r )r� r� r9 r� r� )r@ rK r r< r r r r� 9 s zStreamReaderProgress.read)N)rC rD rE rO rB r� r r r r r� 1 s r� c @ s e Zd ZdS )�NoResourcesAvailableN)rC rD rE r r r r r� ? s r� c @ s& e Zd Zdd� Zd dd�Zdd� ZdS ) � TaskSemaphorec C s t �|�| _dS )zqA semaphore for the purpose of limiting the number of tasks :param count: The size of semaphore N)rQ � Semaphore� _semaphore�r@ �countr r r rB D s zTaskSemaphore.__init__Tc C s( t �d|� | j�|�s$td| ��dS )a� Acquire the semaphore :param tag: A tag identifying what is acquiring the semaphore. Note that this is not really needed to directly use this class but is needed for API compatibility with the SlidingWindowSemaphore implementation. :param block: If True, block until it can be acquired. If False, do not block and raise an exception if cannot be aquired. :returns: A token (can be None) to use when releasing the semaphore � Acquiring %s�Cannot acquire tag '%s'N)�logger�debugr� �acquirer� )r@ �tag�blockingr r r r� K s zTaskSemaphore.acquirec C s t �d||f � | j�� dS )at Release the semaphore :param tag: A tag identifying what is releasing the semaphore :param acquire_token: The token returned from when the semaphore was acquired. Note that this is not really needed to directly use this class but is needed for API compatibility with the SlidingWindowSemaphore implementation. �Releasing acquire %s/%sN)r� r� r� �release)r@ r� � acquire_tokenr r r r� [ s zTaskSemaphore.releaseN)T)rC rD rE rB r� r� r r r r r� C s r� c @ s2 e Zd ZdZdd� Zdd� Zd dd�Zd d � Zd S ) �SlidingWindowSemaphorea� A semaphore used to coordinate sequential resource access. This class is similar to the stdlib BoundedSemaphore: * It's initialized with a count. * Each call to ``acquire()`` decrements the counter. * If the count is at zero, then ``acquire()`` will either block until the count increases, or if ``blocking=False``, then it will raise a NoResourcesAvailable exception indicating that it failed to acquire the semaphore. The main difference is that this semaphore is used to limit access to a resource that requires sequential access. For example, if I want to access resource R that has 20 subresources R_0 - R_19, this semaphore can also enforce that you only have a max range of 10 at any given point in time. You must also specify a tag name when you acquire the semaphore. The sliding window semantics apply on a per tag basis. The internal count will only be incremented when the minimum sequence number for a tag is released. c C s8 || _ tt�| _i | _t�� | _t�| j�| _ i | _ d S r ) rU r r" �_tag_sequences�_lowest_sequencerQ rR rS � Condition� _condition�_pending_releaser� r r r rB ~ s z SlidingWindowSemaphore.__init__c C s0 | j � | jW d � S 1 s"0 Y d S r rX rL r r r rY � s z$SlidingWindowSemaphore.current_countTc C s� t �d|� | j�� z~| jdkrJ|s4td| ��n| jdkrJ| j�� q4| j| }|dkrf|| j|< | j| d7 < | jd8 _|W | j� � S | j� � 0 d S )Nr� r r� r) ) r� r� r� r� rU r� �waitr� r� r� )r@ r� r� �sequence_numberr r r r� � s" �z SlidingWindowSemaphore.acquirec C sB |}t �d||� | j�� �z|| jvr6td| ��| j| }| j| |kr�| j| d7 < | jd7 _| j�� | j � |g �}|r�| j| |d kr�|� � | j| d7 < | jd7 _q�q�q�nX| j| | k r�|k �rn n(| j � |g �� |� | j | jdd� ntd||f ��W | j�� n | j�� 0 d S )Nr� z$Attempted to release unknown tag: %sr) ���T)�reversez;Attempted to release unknown sequence number %s for tag: %s)r� r� r� r� r� r� r� rU �notifyr� �get�pop� setdefaultr/ �sortr� )r@ r� r� r� Z max_sequenceZqueuedr r r r� � s> ����z SlidingWindowSemaphore.releaseN)T)rC rD rE rO rB rY r� r� r r r r r� h s r� c @ s6 e Zd Zeeefdd�Zd dd�Zdd� Zdd � Z dS ) �ChunksizeAdjusterc C s || _ || _|| _d S r )�max_size�min_size� max_parts)r@ r� r� r� r r r rB � s zChunksizeAdjuster.__init__Nc C s" |}|dur| � ||�}| �|�S )a� Get a chunksize close to current that fits within all S3 limits. :type current_chunksize: int :param current_chunksize: The currently configured chunksize. :type file_size: int or None :param file_size: The size of the file to upload. This might be None if the object being transferred has an unknown size. :returns: A valid chunksize that fits within configured limits. N)�_adjust_for_max_parts� _adjust_for_chunksize_limits)r@ �current_chunksizer� � chunksizer r r �adjust_chunksize� s z"ChunksizeAdjuster.adjust_chunksizec C sP || j kr$t�d| j |f � | j S || jk rHt�d| j|f � | jS |S d S )Nz@Chunksize greater than maximum chunksize. Setting to %s from %s.z=Chunksize less than minimum chunksize. Setting to %s from %s.)r� r� r� r� )r@ r� r r r r� � s �� ��z.ChunksizeAdjuster._adjust_for_chunksize_limitsc C sb |}t t�|t|� ��}|| jkrD|d9 }t t�|t|� ��}q||kr^t�d||f � |S )Nr� z[Chunksize would result in the number of parts exceeding the maximum. Setting to %s from %s.)r" r# r$ r% r� r� r� )r@ r� r� r� r+ r r r r� � s ��z'ChunksizeAdjuster._adjust_for_max_parts)N) rC rD rE �MAX_SINGLE_UPLOAD_SIZE�MIN_UPLOAD_CHUNKSIZE� MAX_PARTSrB r� r� r� r r r r r� � s � r� )r )N)2r �timer0 r# ra �socketrw r �loggingrQ �io� collectionsr Zbotocore.exceptionsr r Zs3transfer.compatr r r r r� r� r� � getLoggerrC r� �timeoutZ S3_RETRYABLE_DOWNLOAD_ERRORSr r r! r( r, r5 r9 r= �objectr> rF rP r_ r� rh r� � Exceptionr� r� r� r� r r r r �<module> sX � � 0OC /%_
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