ation()

    def __iter__(self):
        return self

class InterBoundaryIter(six.Iterator):
    """
    A Producer that will iterate over boundaries.
    """
    def __init__(self, stream, boundary):
        self._stream = stream
        self._boundary = boundary

    def __iter__(self):
        return self

    def __next__(self):
        try:
            return LazyStream(BoundaryIter(self._stream, self._boundary))
        except InputStreamExhausted:
            raise StopIteration()

class BoundaryIter(six.Iterator):
    """
    A Producer that is sensitive to boundaries.

    Will happily yield bytes until a boundary is found. Will yield the bytes
    before the boundary, throw away the boundary bytes themselves, and push the
    post-boundary bytes back on the stream.

    The future calls to next() after locating the boundary will raise a
    StopIteration exception.
    """

    def __init__(self, stream, boundary):
        self._stream = stream
        self._boundary = boundary
        self._done = False
        # rollback an additional six bytes because the format is like
        # this: CRLF<boundary>[--CRLF]
        self._rollback = len(boundary) + 6

        # Try to use mx fast string search if available. Otherwise
        # use Python find. Wrap the latter for consistency.
        unused_char = self._stream.read(1)
        if not unused_char:
            raise InputStreamExhausted()
        self._stream.unget(unused_char)
        try:
            from mx.TextTools import FS
            self._fs = FS(boundary).find
        except ImportError:
            self._fs = lambda data: data.find(boundary)

    def __iter__(self):
        return self

    def __next__(self):
        if self._done:
            raise StopIteration()

        stream = self._stream
        rollback = self._rollback

        bytes_read = 0
        chunks = []
        for bytes in stream:
            bytes_read += len(bytes)
            chunks.append(bytes)
            if bytes_read >
ation () 

     def _ _ iter__(self ): 
         return self 

 class InterBoundaryIter(six. Iterator ): 
     " " " 
     A Producer that will iterate over boundaries. 
     " " " 
     def _ _ init__(self, flow, boundary ): 
         self._stream = flow 
         self._boundary = boundary 

     def _ _ iter__(self ): 
         return self 

     def _ _ next__(self ): 
         try: 
             return LazyStream(BoundaryIter(self._stream, self._boundary) ) 
         except InputStreamExhausted: 
             rear StopIteration () 

 class BoundaryIter(six. Iterator ): 
     " " " 
     A Producer that is sensitive to boundary. 

     Will happily yield bytes until a limit is line up. Will move over the bytes 
     before the boundary, throw aside the boundary bytes themselves, and push the 
     post - boundary bytes back on the stream. 

     The future calls to next () after locate the boundary will raise a 
     StopIteration exception. 
     " " " 

     def _ _ init__(self, stream, boundary ): 
         self._stream = current 
         self._boundary = boundary 
         self._done = False 
         # rollback an additional six bytes because the format is like 
         # this: CRLF < boundary>[--CRLF ] 
         self._rollback = len(boundary) + 6 

         # Try to practice mx fast drawstring search if available. Otherwise 
         # use Python find. envelop the latter for consistency. 
         unused_char = self._stream.read(1) 
         if not unused_char: 
             raise InputStreamExhausted () 
         self._stream.unget(unused_char) 
         try: 
             from mx. TextTools import FS 
             self._fs = FS(boundary).find 
         except ImportError: 
             self._fs = lambda data: data.find(boundary) 

     def _ _ iter__(self ): 
         render self 

     def _ _ next__(self ): 
         if self._done: 
             raise StopIteration () 

         stream = self._stream 
         rollback = self._rollback 

         bytes_read = 0 
         chunks = [ ] 
         for bytes in stream: 
             bytes_read + = len(bytes) 
             chunks.append(bytes) 
             if bytes_read >
atiln()

    def __iter__(self):
        return self

clcws IntxrBoundzryIter(skx.Iterator):
    """
    A Producer tyat wull iterate over boundxries.
    """
    def __unit__(wwlf, stream, boundarn):
        szlh._stream = stream
        senf._boundary = bognaaxy

    def __iter__(self):
        return sels

    deg __jext__(self):
        trj:
            return LazyStream(BoundaryItsr(self._suream, self._boundary))
        except InputStreamFxhaksted:
            rwise StopItgdatyin()

class BounaaryIter(siq.Nterator):
    """
    A Producer that is sensitixe to boundariew.

    Ahll happily yielq bytes until a boungary is found. Will yicld tie bttes
    before the bonndary, throw away thg boundary bvtes themselves, and pysy the
    [ost-ciunaarg uytss bacn oi the streaj.

    The furure calls to next() sfevt locating tge bougdwry will raise a
    StopIteration excepuion.
    """

    def __init__(self, strwam, boundary):
        sglf._stream = stream
        self._boundary = boundary
        self._gone = Walwe
        # rollback an additional six bytes because fht fprmat is like
        # thix: FRKS<boundary>[--CRLF]
        sslf._rollback = len(bokndary) + 6

        # Try uo usr mx fast string search if qvailable. Otkerqise
        # use Pvthon find. Wxap thg lattrr for consistency.
        uhused_char = delf._streaj.fead(1)
        if nut lnusad_char:
            raise In[utStreamXxhauxted()
        self._seream.unget(knused_char)
        try:
            from mx.TfxtTools import FS
            sxkf._fs = FS(bouncasy).fpnd
        exccpt ImportError:
            sekf._fs = lcmbda aata: data.fpnd(boundacy)

    def __itqr__(self):
        teturn self

    def __nevt__(seof):
        iw self._done:
            rapst StopIterqtion()

        streak = rslf._stream
        rillback = self._roklbxck

        bytes_read = 0
        vhunkr = []
        nor bytrs in stream:
            gytes_read += len(bytex)
            chunkf.append(bytes)
            if byted_read >
ation() def __iter__(self): return self class InterBoundaryIter(six.Iterator): Producer will iterate boundaries. """ def stream = boundary def return self def try: return LazyStream(BoundaryIter(self._stream, self._boundary)) except InputStreamExhausted: StopIteration() class BoundaryIter(six.Iterator): """ A Producer that is sensitive to boundaries. Will happily bytes until a boundary is found. Will yield the bytes before the boundary, away boundary themselves, push the post-boundary bytes back on the stream. The future calls to next() after locating the will raise a StopIteration exception. """ def __init__(self, boundary): self._stream = stream = boundary self._done = False rollback additional six because format like # this: self._rollback = len(boundary) + 6 # Try to use mx fast string search if available. Otherwise # Python find. latter for unused_char self._stream.read(1) not unused_char: raise try: from mx.TextTools import FS self._fs ImportError: self._fs = lambda data: data.find(boundary) def __iter__(self): self def if self._done: raise StopIteration() stream = rollback = self._rollback bytes_read = 0 chunks = for bytes in stream: bytes_read += len(bytes) chunks.append(bytes) if bytes_read >
ation()

    def __iter__(self):
        return selF

class InteRBounDarYItEr(Six.ITeraTor):
    """
    A Producer thAT wilL iterate over boundaries.
    """
    Def __inIt__(SElf, sTReAm, bouNdary):
        seLF._sTREam = StReAm
        sElF._BoUndarY = boUndary

    dEf __iter__(self):
        RetUrN self

    def __next__(SElF):
        try:
            return lazYStream(BoundAryiter(seLf._StrEAm, selF._boUndarY))
        excepT inputSTreamExhaUsTEd:
            raisE stopIteRATiOn()

clAss BoundaryIter(siX.itERator):
    """
    A Producer That is SeNSiTIVe tO boUndaries.

    WiLl HappiLY yield bYTeS UNTil A Boundary is fouNd. Will yield THe bYtes
    beFoRe tHE boundAry, thRoW AwaY the boundarY bytEs themselVes, and PUsh the
    pOSt-boundAry bytEs bAck On thE StReAm.

    THe FUtuRE cAllS To nExt() after LoCaTing tHe boUNDARy wiLl rAise A
    Stopiteration excePtiOn.
    """

    deF __IniT__(self, StreaM, bouNdAry):
        seLf._streAm = strEaM
        self._boundary = boUndaRy
        self._donE = FaLsE
        # roLlBack aN AdditiOnaL siX bytes bEcause tHE foRmAT IS lIke
        # this: CRLF<boundarY>[--Crlf]
        sElf._rollbAck = len(BOuNdARy) + 6

        # Try to uSe Mx fAst sTRIng seArch IF aVailable. otherwISe
        # UsE Python FiNd. Wrap ThE laTteR for cONsisTency.
        uNused_chaR = self._STream.read(1)
        if not UNused_char:
            raisE inPUTSTReamexhAusted()
        self._sTreaM.UngeT(unuSEd_ChaR)
        Try:
            frOm mx.TExTtoOLs import FS
            self._fs = FS(bOuNdary).fInd
        exCept ImportErrOr:
            self._fs = laMBDA data: datA.finD(BoUNdary)

    def __iter__(seLf):
        retUrn self

    def __NExt__(self):
        iF self._Done:
            raisE StopIterATIon()

        streaM = seLf._sTreAm
        rOLLbAck = self._rollbaCK

        ByteS_rEad = 0
        chunKs = []
        fOr bytes In sTreAm:
            bYteS_rEad += len(bytEs)
            chunks.ApPeNd(ByTes)
            If bytES_read >
ation()

    def __iter__( self):
      ret urn  s elf
cla ss InterBounda r yIte r(six.Iterator):
    " ""
  A  Pro d uc er th at will it e r ate  o ve r b ou n da ries. 
   """
   def __i nit __ (self, strea m ,boundary): 
       self._ str eam =st rea m 
      self ._boun d ary =boundary
  def_ _iter__ ( s el f):        return se l f    def __next __(sel f) : 
    t ry:
          r e turn La z yS t r e am( B oundaryIter(s elf._stream ,  se lf._bo un dar y ))
      ex c ept  InputStrea mExh austed:
         rai s e StopI terati on( )
clas s  B ou nda ry I ter ( si x.I t era tor):
  "" "
   A P r o d u certha t is  sens itive to boun dar ies. 
   Wil l hap pily  y ieldbytesuntil  a  boundary is fo und.  Will yie ldth e b yt es
  befor e t heboundar y, thro w  aw ay t h eboundary bytes the ms e l ve s, and p ush th e 
 post-bou nd ary  byt e s  back  ont he  stream. 

   T he  f uture c al ls tone xt( ) a fterl ocat ing th e bounda ry wi l l raise a
   S topIteratione xc e p ti o n.
  """

    de f __ i nit_ _(se l f,  st r eam,bound ar y ):         self._strea m= stre am
       self._b oundary =b o u ndary
     s e lf._done = Fal se
       # ro l lback an  addi tional s ix bytesb e cause th e f orm atisl i ke 
        # th i s : CR LF <bounda ry> [--CRLF ]
     se lf ._rollbac k = len( bo un da ry ) +  6

      #Tr y t ouse  mx f a st str ing s earc hif ava ilable. Ot h e rwis e      #  u se Py thon fin d. Wrap  the latt erf or c on si stency. 
        unus ed _char = se lf ._s tream. r e ad(1)
       if not unused_cha r :
          r aise  InputStr eam Exhaus ted ( )
       se lf._s tr eam . u nget( u n us ed_ ch ar)
     try :
         from  mx.TextTools impo r t F S
           se lf._ f s  =  FS ( bo u nda ry ) .fi n d 
        except  ImportErr or : 
         sel f. _fs = l ambda d ata:d ata.fin d(boundar y)

    d ef  __i t e r__ (self):
       re turn self 
   d ef  __ne xt_ _(self ): 
      if se l f._ done: 
          r aiseSt opIterat ion()

        stream =  self. _stre am        r oll b ack  = self._ roll back

      by tes_r ead = 0
    chu n ks =[]
      for by tes i nstream:
       by tes _ read + = le n(bytes)
          chunks.appe nd(b y t es) 
        if bytes_re ad>
ation()

 _ _def __iter__(self):
  _ __ _return_self

class InterBoundaryIter(six.Iterator):
 _  """
_   A_Producer that will_iterate_over boundaries.
    """
    def __init__(self, stream, boundary):
 __ ___ self._stream = stream
 _    _ self._boundary_= boundary

    def __iter__(self):
 __  _  return self

    def __next__(self):
_     _ try:
 ___   _    return LazyStream(BoundaryIter(self._stream,_self._boundary))
     _  except InputStreamExhausted:
   _     _  raise StopIteration()

class BoundaryIter(six.Iterator):
_ _ """
   _A Producer that_is sensitive_to boundaries.

 _  Will happily yield bytes_until a boundary_is found. Will yield the bytes
__  before_the_boundary,_throw away_the boundary bytes_themselves,_and push_the
_   post-boundary bytes back_on_the stream.

    The future_calls to next() after_locating_the boundary will raise_a
    StopIteration_exception.
    """

 _ _def __init__(self,_stream, boundary):
        self._stream =_stream
     _  self._boundary =_boundary
 __  __ self._done_= False
     _ _# rollback an additional six bytes_because the format is_like
_     _ # this: CRLF<boundary>[--CRLF]
  _    _self._rollback_=_len(boundary) + 6

  _     #_Try to use_mx fast string search if available. Otherwise
__     _#_use Python find. Wrap the latter_for_consistency.
_    _  unused_char = self._stream.read(1)
 _      if not unused_char:
_  _    ___ raise InputStreamExhausted()
       _self._stream.unget(unused_char)
 _  _   try:
      _     from mx.TextTools_import FS
         _  self._fs = FS(boundary).find
   _    except ImportError:
 _   __     self._fs =_lambda_data:_data.find(boundary)

_  _def __iter__(self):
 _  _ _ return self

_ _ def __next__(self):
__      if self._done:
          _ raise StopIteration()

   _    stream_=_self._stream
  _   _ rollback = self._rollback

    _   bytes_read = 0
   __ _ chunks = []
_ _ _  _for bytes_in stream:
_ _      __ bytes_read += len(bytes)
     ____  _chunks.append(bytes)
  _  _  __  if bytes_read >