o .jV@sbdZddlmZddlmZmZmZddlmZm Z ddl m Z m Z m Z mZdZGdd d Zd S) zy h2/frame_buffer ~~~~~~~~~~~~~~~ A data structure that provides a way to iterate over a byte buffer in terms of frames. ) annotations)FrameDataMissingErrorFrameTooLargeError ProtocolError)InvalidDataErrorInvalidFrameError)ContinuationFrameFrame HeadersFramePushPromiseFrame@c@sBeZdZdZdddZddZddZd d Zd d Zd dZ dS) FrameBufferz This is a data structure that expects to act as a buffer for HTTP/2 data that allows iteraton in terms of H2 frames. FcCs2t|_d|_|r dnd|_t|j|_g|_dS)NrsPRI * HTTP/2.0 SM ) bytearray_datamax_frame_size _preamblelen _preamble_len_headers_buffer)selfserverrE/home/thesage/.local/lib/python3.10/site-packages/jh2/frame_buffer.py__init__ s   zFrameBuffer.__init__cCsx|jr3t|}t|j|}|jd||d|krtd||d}|j|8_|j|d|_|j|7_dS)zs Add more data to the frame buffer. :param data: A bytestring containing the byte buffer. NzInvalid HTTP/2 preamble.)rrminrrr)rdatadata_lenof_which_preamblerrradd_data's  zFrameBuffer.add_datacCs ||jkrtd||jfdS)zB Confirm that the frame is an appropriate length. z*Received overlong frame: length %d, max %dN)rr)rlengthrrr_validate_frame_length:s z"FrameBuffer._validate_frame_lengthcCs|jrS|jdj}|duot|to|j|k}|std|j|t|jtkr.tdd|jvrO|jd}|j dd dd|jD|_ g|_|Sd}|St|t t frgd|jvrg|j|d}|S) z Updates the internal header buffer. Returns a frame that should replace the current one. May throw exceptions if this frame is invalid. rNz"Invalid frame during header block.z&Too many continuation frames received. END_HEADERSrcss|]}|jVqdSN)r).0xrrr dsz4FrameBuffer._update_header_buffer..)r stream_id isinstancer rappendrCONTINUATION_BACKLOGflagsaddjoinrr r )rfr( valid_framerrr_update_header_bufferDs4         z!FrameBuffer._update_header_buffercCs|Sr$r)rrrr__iter__tszFrameBuffer.__iter__c Cst|jdkr tztt|jdd\}}Wnttfy0}ztdt |d}~wwt|j|dkr=t| |z| t|jdd|Wnty]tdtygt dw|jd|d|_| |}|dur}|S|S)N z&Received frame with invalid header: %sz&Received frame with non-compliant datazFrame data missing or invalid)rr StopIterationr parse_frame_header memoryviewrrrstrr" parse_bodyrr1__next__)rr/r!errrr9ws*      zFrameBuffer.__next__N)F) __name__ __module__ __qualname____doc__rr r"r1r2r9rrrrrs  0 rN)r> __future__r exceptionsrrrhyperframe.exceptionsrrhyperframe.framer r r r r+rrrrrs