\dCm\dZddlZddlZddlZddlZddlZddlmZddlmZddl m Z ddl Z ddl m Z dadZGdd eZdd Zd ZGd deZdZGddZGddZGddZgZdZGddeZdZdZddddejfdZ dZ!dS)z9 Asynchronous-friendly error mechanism. See L{Failure}. N)getmro)StringIO)NoReturn)reflectceZdZdS)DefaultExceptionN)__name__ __module__ __qualname__6lib/python3.11/site-packages/twisted/python/failure.pyr r !sDrr defaultc |dvrtd|d|}|dkr!|D]\}}}}}||d|d|ddS|dkrU|D]P\}}}}}|d|d |d |d|d tj||zQdS|d kr)|D]\}}}}}|d |||fz|ddS|dkr|D]\}}}}}|d |||fz|d|D]$\} } |d| dt | d%|d|D]$\} } |d| dt | d%~dSdS)a Format and write frames. @param frames: is a list of frames as used by Failure.frames, with each frame being a list of (funcName, fileName, lineNumber, locals.items(), globals.items()) @type frames: list @param write: this will be called with formatted strings. @type write: callable @param detail: Four detail levels are available: default, brief, verbose, and verbose-vars-not-captured. C{Failure.printDetailedTraceback} uses the latter when the caller asks for verbose, but no vars were captured, so that an explicit warning about the missing data is shown. @type detail: string )rbriefverboseverbose-vars-not-capturedzKDetail must be default, brief, verbose, or verbose-vars-not-captured. (not )r: rz File "z", line z, in z %s rz%s:%d: %s(...) zA [Capture of Locals and Globals disabled (use captureVars=True)] rz [ Locals ] z z : z ( Globals ) N) ValueError linecachegetlinestriprepr) frameswritedetailwmethodfilenamelineno localVars globalVarsnamevals r format_framesr(%s{"QQQj5;VV >    A ?E 1 1 ;FHfi A//F//V/// 0 0 0 0 1 1 9  ?E H H ;FHfi ABBB6BBBBB C C C Aj9,Xv>>DDFFF G G G G H H . . .?E ? ? ;FHfi A Hff#== > > > >  NOOOOO 9  ?E / / ;FHfi A Hff#== > > > Ao   & / / c-t--S ---.... A   ' / / c-t--S ---.... /   / /rz--- ---ceZdZdZdS)NoCurrentExceptionErrorz Raised when trying to create a Failure from the current interpreter exception state and there is no current exception state. N)r r r __doc__r rrr*r*Xsrr*c,t|dks Jdd}|D]}t||}t|d|}t|x}}|ddD]-}t||}t||_|j}.|S)a5 Construct a fake traceback object using a list of frames. It should have the same API as stdlib to allow interaction with other tools. @param stackFrames: [(methodname, filename, lineno, locals, globals), ...] @param tbFrames: [(methodname, filename, lineno, locals, globals), ...] rzMust pass some framesN)len_Frame_TracebackFrametb_next) stackFramestbFramesstacksffirstTbtbs r _Tracebackr8_s x==1   5    E""r5!! 8A; & &E"5)))Gbqrrlr5!!$U++ Z NrceZdZdZdZdS)r0zq Fake traceback object which can be passed to functions in the standard library L{traceback} module. cR||_|j|_|j|_d|_dS)z- @param frame: _Frame object N)tb_framef_lineno tb_linenof_lastitb_lastir1)selfframes r__init__z_TracebackFrame.__init__s(    rNr r r r+rBr rrr0r0s- rr0ceZdZdZdZdS)r/aD A fake frame object, used by L{_Traceback}. @ivar f_code: fake L{code} object @ivar f_lineno: line number @ivar f_globals: fake f_globals dictionary (usually empty) @ivar f_locals: fake f_locals dictionary (usually empty) @ivar f_back: previous stack frame (towards the caller) c&|\}}}}}t|||_||_t|pi|_t|pi|_||_d|_tt |_ d|_ dS)z @param frameinfo: (methodname, filename, lineno, locals, globals) @param back: previous (older) stack frame @type back: C{frame} rN) _Codef_coder<dict f_globalsf_localsf_backr>varsbuiltinscopy f_builtinsf_trace)r@ frameinfobackr&r"r#localzglobalzs rrBz_Frame.__init__s 3</hD(++  gm,,V\r**   x..--// rNrCr rrr/r/s-rr/ceZdZdZdZdZdS)rFz A fake code object, used by L{_Traceback} via L{_Frame}. It is intended to have the same API as the stdlib code type to allow interoperation with other tools based on that interface. c||_||_d|_d|_d|_g|_d|_d|_d|_d|_ d|_ d|_ d|_ d|_ d|_d|_dS)Nrrr )co_name co_filename co_lnotabco_firstlineno co_argcount co_varnamesco_code co_cellvars co_constsco_flags co_freevarsco_posonlyargcountco_kwonlyargcountco_names co_nlocals co_stacksize)r@r&r"s rrBz_Code.__init__s #  "#!" rcdS)N))NNNNr r@s r co_positionsz_Code.co_positionss**rN)r r r r+rBrir rrrFrFs<$+++++rrFcDt|j|S)a Mark the given callable as extraneous to inlineCallbacks exception reporting; don't show these functions. @param f: a function that you NEVER WANT TO SEE AGAIN in ANY TRACEBACK reported by Failure. @type f: function @return: f )_inlineCallbacksExtraneousappend__code__)fs r _extraneousros%%aj111 HrceZdZdZdZdZejdZddZ dZ dZ d Z d e fd Zed Zed Zd efdZd efdZdZdZdZd efdZd efdZddeded efdZddZddZddZdS) Failurea A basic abstraction for an error that has occurred. This is necessary because Python's built-in error mechanisms are inconvenient for asynchronous communication. The C{stack} and C{frame} attributes contain frames. Each frame is a tuple of (funcName, fileName, lineNumber, localsItems, globalsItems), where localsItems and globalsItems are the contents of C{locals().items()}/C{globals().items()} for that frame, or an empty tuple if those details were not captured. @ivar value: The exception instance responsible for this failure. @ivar type: The exception's class. @ivar stack: list of frames, innermost last, excluding C{Failure.__init__}. @ivar frames: list of frames, innermost first. rN YIELD_VALUEFctdzat|_dx|_x|_}||_t |t r|t dd}||}|9tj \|_|_}|jtd}nN|>t |tr |j |_nt||_||_n||_||_t |jtr||jdSt|jdr(||jj|j`dS|'|r|}n"t#|jddr |jj}gx}|_gx}|_||_|r|j} nt |jtsdx} }|r| r| j} |dz}|r| | r|rz| j} | j| juri} n| j} | | fD] } d| vr| d= | } | } ndx} } |d| jj| jj| j | | f| j} | ||j} |r| j} | j| juri} n| j} | | fD] } d| vr| d= tC| } tC| } ndx} } |"| jj| jj|j#| | f|j$}|tKj&|jr\tO|jtrBtQ|j} tCtStTj+| |_,dS|jg|_,dS) a- Initialize me with an explanation of the error. By default, this will use the current C{exception} (L{sys.exc_info}()). However, if you want to specify a particular kind of failure, you can pass an exception as an argument. If no C{exc_value} is passed, then an "original" C{Failure} will be searched for. If the current exception handler that this C{Failure} is being constructed in is handling an exception raised by L{raiseException}, then this C{Failure} will act like the original C{Failure}. For C{exc_tb} only L{traceback} instances or L{None} are allowed. If L{None} is supplied for C{exc_value}, the value of C{exc_tb} is ignored, otherwise if C{exc_tb} is L{None}, it will be found from execution context (ie, L{sys.exc_info}). @param captureVars: if set, capture locals and globals of stack frames. This is pretty slow, and makes no difference unless you are going to use L{printDetailedTraceback}. r-Nz$Strings are not supported by Failurer __failure__ __traceback__ __builtins__r )-counttypevalue captureVars isinstancestr TypeError _findFailuresysexc_infor* Exception __class__rq _extrapolatehasattrrtgetattrrurr4r7r;rKrJrNrIitemsinsertrGrWrXr<listrlr=r1inspectisclass issubclassrmaprqualparents)r@ exc_valueexc_typeexc_tbrzr7 stackOffsetrr4rnrSrTdparentCss rrBzFailure.__init__sW2  &** *DJ& i % % D(*:BCC C  ))++I  (+  %DItz2y -///KK  )Y// ,%/ !OO "DJJ DI"DJ dj' * *    dj ) ) ) F 4:} - -    dj4 5 5 5  & F : ._d;; .Z-!!   # AADJ00 ## "A  a A 1 K  a   &**:,, GGk..00G &..A%**n-!--//#%% LLH$H(J    A1 4n A &**:,, GGk..00G &..A%**n-fllnn--w}}//#%% MMH$H(L    B1n2 ?49 % % '*TY *J*J 'di((HGL( ; ;<>1bn Ax999 X%qx';R\2rRB n  dk""" rcF|j|}|s||S)a Trap this failure if its type is in a predetermined list. This allows you to trap a Failure in an error callback. It will be automatically re-raised if it is not a type that you expect. The reason for having this particular API is because it's very useful in Deferred errback chains:: def _ebFoo(self, failure): r = failure.trap(Spam, Eggs) print('The Failure is due to either Spam or Eggs!') if r == Spam: print('Spam did it!') elif r == Eggs: print('Eggs did it!') If the failure is not a Spam or an Eggs, then the Failure will be 'passed on' to the next errback. In Python 2 the Failure will be raised; in Python 3 the underlying exception will be re-raised. @type errorTypes: L{Exception} )checkraiseException)r@ errorTypeserrors rtrapz Failure.traps10 J' "    ! ! ! rc|D]N}|}tj|r)t|trt j|}||jvr|cSOdS)a Check if this failure's type is in a predetermined list. @type errorTypes: list of L{Exception} classes or fully-qualified class names. @returns: the matching L{Exception} type, or None if no match. N)rrrrrrr)r@rrerrs rrz Failure.checksj   ECu%% **UI*F*F *l5))dl"" #trreturnc@|j|j)zf raise the original exception, preserving traceback information if available. )rywith_tracebackr7rhs rrzFailure.raiseExceptions j''000rcN||j|j|jS)aJ Throw the original exception into the given generator, preserving traceback information if available. @return: The next value yielded from the generator. @raise StopIteration: If there are no more values in the generator. @raise anything else: Anything that the generator raises. )throwrxryr7)r@gs rthrowExceptionIntoGeneratorz#Failure.throwExceptionIntoGenerators wwty$*dg666rc tjd}|sdSd}|}|jr|}|j}|j|j}|j|jjur|jdS|jj r |jj |j |j krdS|r4|j}|j|j jur|jdS|jj }|r-|j|j jur|jdSdSdS)zV Find the failure that represents the exception currently in context. Nr@)rrr1r;rGrrmrJgetr]r? _yieldOpcoderrK)clsr7 secondLastTblastTb lastFramerAs rr~zFailure._findFailuresC \^^B   F n $!L^Fn $O   s1: : :%))&11 1 ( Y-=-E O.  .. F  2 )E|s>GGG~))&111 "  .U\S%D%MMM>%%f-- - . .MMrcdtj|jtj|j|S)Nz <{} {}: {}>)formatrrrrxgetErrorMessagerhs r__repr__zFailure.__repr__CsG## L ( ( L # #  " "   rc0d|zS)Nz[Failure instance: %s])getBriefTracebackrhs r__str__zFailure.__str__Js'$*@*@*B*BBBrc|jr|jS|j}d|jD|d<d|d<|jd|jD|d<d|d<|S) z(Avoid pickling objects in the traceback.c g|]A}|d|d|dt|dt|dgBSrr-r _safeReprVars.0vs r z(Failure.__getstate__..Ss_     !!!ad##ad##      rrNr7c g|]A}|d|d|dt|dt|dgBSrrrs rrz(Failure.__getstate__..ds_    aDaDaD!!A$''!!A$''    rr4r-pickled)rrrNrr4)r@cs r __getstate__zFailure.__getstate__Ms < != M      [    ( $ : !     AgJ) rc||_t|jddrd|j_dSdS)z Remove references to other objects, replacing them with strings. On Python 3, this will also set the C{__traceback__} attribute of the exception instance to L{None}. ruN)rrrryrurhs r cleanFailurezFailure.cleanFailurersG))++ 4: 5 5 ,'+DJ $ $ $ , ,rc|j|jSt|jdkrt|j|jSdS)a Get an object that represents this Failure's stack that can be passed to traceback.extract_tb. If the original traceback object is still present, return that. If this traceback object has been lost but we still have the information, return a fake traceback object (see L{_Traceback}). If there is no traceback information at all, return None. Nr)r7r.rr8r4rhs rgetTracebackObjectzFailure.getTracebackObject~sA 7 7N    ! !dj$+66 64rct|jtr|jSt j|jS)zJ Get a string of the exception which caused this Failure. )r{ryrqrrsafe_strrhs rrzFailure.getErrorMessages? dj' * * 0:--// / +++rcrt}|||S)N)file)rprintBriefTracebackgetvalue)r@ios rrzFailure.getBriefTracebacks0 ZZ   b ))){{}}rrelideFrameworkCodercvt}|||||S)N)rrr)rprintTracebackr)r@rrrs r getTracebackzFailure.getTracebacks@ ZZ (:6    {{}}rc | ddlm}|j}|j}|dkr |jsd}n|}|dkr|d|j|jrdpdfzn`|d krO|jrd }nd }||d tj |j d tj |j d n |d|jrP|s7t|j t d|||td t|j||n|d ks |d|d ks?|tj|j d tj |j d t#|j t$r1|d|j ||||dkr|d|jzdSdS)a Emulate Python's standard error reporting mechanism. @param file: If specified, a file-like object to which to write the traceback. @param elideFrameworkCode: A flag indicating whether to attempt to remove uninteresting frames from within Twisted itself from the output. @param detail: A string indicating how much information to include in the traceback. Must be one of C{'brief'}, C{'default'}, or C{'verbose'}. Nr)logrrz*--- Failure #%d%s--- z (pickled)  r Tracebackz"Traceback (failure with no frames)z: rz#Traceback (most recent call last): z Failure: z (chained Failure) z*--- End of Failure #%d --- )twisted.pythonrlogerrrrzrwrrrrrxryr(r4 traceupLengthEXCEPTION_CAUGHT_HERErr{rqr)r@rrrrr formatDetail hasFramess rrzFailure.printTracebacksO < * * * * * *:D J Y  t'7 7LL!L Y   A): >F3GH    w  { A' @ A99g.ty99997;KDJ;W;W;W;WY     A4 5 5 5 ; % 0dj-91lKKK*.../// $+q, 7 7 7 77"" AkNNN  Adi((LLG, G G G Y   A- : ; ; ; ; ;  rc6|||ddS)z; Print a traceback as densely as possible. rrNrr@rrs rrzFailure.printBriefTracebacks& D"4WEEEEErc6|||ddS)zQ Print a traceback with detailed locals and globals information. rrNrrs rprintDetailedTracebackzFailure.printDetailedTracebacks& D"4YGGGGGr)NNNF)rr)NFr)Nr) r r r r+rr4opcodeopmaprrBrrrrrror classmethodr~r|rrrrrrrintrrrrr rrrqrqs$G E< .Ld'd'd'd'L:: 11111 7 7[ 78.8.[8.t #    CCCCC###J , , ,",,,,,3 sTWC<C<C<C.s, L L L{cT7$S)) * L L Lrr ) varsDictItemss rrrs M Lm L L LLrTFc`|||fdkrtj}|d|jksqtrj t |d}n#t $rd}YnwxYwt d|ddl}| |d||||||dS)z; Initialize failure object, possibly spawning pdb. )NNNrr-z broken strz8Jumping into debugger for post-mortem of exception '{}':Nr) rrrDO_POST_MORTEMr| BaseExceptionprintrpdb post_mortem) r@rrrrzFailure__init__excstrreprrs r _debuginitrs 8V$(:::lnn1v''N' 'c!f++  ' ' '& ' JQQ    JJJ OOCF # # #OD)Xv{CCCCCsA AAc(tt_dS)z* Enable debug hooks for Failures. N)rrqrBr rrstartDebugModer%s"Gr)r)"r+rMrNrrrrrrtypingrrrrrwrrr r(rr*r8r0r/rFrkrorrqrrrBrrr rrrsE   """"""       y   +/+/+/+/`:i###R         8++++++++<     MHMHMHMHMHmMHMHMH` M M M    $ DDDD:"""""r