U W¨+d¦ã@s‚ddlZddlZddlZddlmZdZdeZdZefdd„Zefdd „Z d d „Z dd d „Z dd„Z dd„Z Gdd„deƒZdS)éN)Úsixééé'cCsht}|t|kr`|dtdkr,td|ƒ‚|d}d}||krVt t|¡}|d7}q8t|ƒ}n|}|S)a"Calculate the minimum part size needed for a multipart upload. Glacier allows a maximum of 10,000 parts per upload. It also states that the maximum archive size is 10,000 * 4 GB, which means the part size can range from 1MB to 4GB (provided it is one 1MB multiplied by a power of 2). This function will compute what the minimum part size must be in order to upload a file of size ``size_in_bytes``. It will first check if ``default_part_size`` is sufficient for a part size given the ``size_in_bytes``. If this is not the case, then the smallest part size than can accomodate a file of size ``size_in_bytes`` will be returned. If the file size is greater than the maximum allowed archive size of 10,000 * 4GB, a ``ValueError`` will be raised. irzFile size too large: %séé)Ú _MEGABYTEÚMAXIMUM_NUMBER_OF_PARTSÚ ValueErrorÚmathÚldexpÚint)Z size_in_bytesZdefault_part_sizeZ part_sizeZ min_part_sizeÚpower©rú6/tmp/pip-unpacked-wheel-dlxw5sjy/boto/glacier/utils.pyÚminimum_part_size"s     rcCsttt t|ƒt|ƒ¡ƒ}g}t|ƒD]4}||}|d|}| t |||…¡  ¡¡q&|spt d¡  ¡gS|S)Nró) r r ÚceilÚlenÚfloatÚrangeÚappendÚhashlibÚsha256Údigest)Z bytestringÚ chunk_sizeZ chunk_countÚhashesÚiÚstartÚendrrrÚ chunk_hashesJs  r cCs’g}| |¡t|ƒdkrŠg}t|ƒdkrX| d¡}| d¡}| t ||¡ ¡¡qt|ƒdkr~| d¡}| |¡qq~q| |¡q|dS)z¤ Given a hash of each 1MB chunk (from chunk_hashes) this will hash together adjacent hashes until it ends up with one big one. So a tree of hashes. rr)ÚextendrÚpoprrrr)ÚforZ new_hashesÚfirstÚsecondÚonlyrrrÚ tree_hashVs         r'cCs®tjr"t|dƒr"d|jkr"tdƒ‚t ¡}g}| |¡}|r†t|t ƒs\|  t |ddƒpXd¡}|  |¡|  t |¡ ¡¡| |¡}q8|sšt d¡ ¡g}| ¡tt|ƒƒfS)aÎCompute the linear and tree hash from a fileobj. This function will compute the linear/tree hash of a fileobj in a single pass through the fileobj. :param fileobj: A file like object. :param chunk_size: The size of the chunks to use for the tree hash. This is also the buffer size used to read from `fileobj`. :rtype: tuple :return: A tuple of (linear_hash, tree_hash). Both hashes are returned in hex. ÚmodeÚbz/File-like object must be opened in binary mode!ÚencodingÚzutf-8r)rÚPY3Úhasattrr(r rrÚreadÚ isinstanceÚbytesÚencodeÚgetattrÚupdaterrÚ hexdigestÚ bytes_to_hexr')ÚfileobjrZ linear_hashÚchunksÚchunkrrrÚcompute_hashes_from_fileobjns    r9cCs t |¡S©N)ÚbinasciiÚhexlify©Z str_as_bytesrrrr5”sr5cCsttt|ƒƒƒS)z² :type str_as_bytes: str :param str_as_bytes: The string for which to compute the tree hash. :rtype: str :return: The computed tree hash, returned as hex. )r5r'r r=rrrÚtree_hash_from_str˜s r>c@seZdZdd„Zdd„ZdS)ÚResettingFileSendercCs||_| ¡|_dSr:)Ú_archiveÚtellÚ_starting_offset)ÚselfÚarchiverrrÚ__init__¦szResettingFileSender.__init__c Cs4z| |||j|¡| ¡W¢S|j |j¡XdSr:)r@ÚseekrBÚrequestÚ getresponse)rCÚ connectionÚmethodÚpathÚbodyÚheadersrrrÚ__call__ªs zResettingFileSender.__call__N)Ú__name__Ú __module__Ú __qualname__rErNrrrrr?¥sr?)r)rr r;Z boto.compatrrZDEFAULT_PART_SIZEr rr r'r9r5r>Úobjectr?rrrrÚs  (  &