C///

\FF\D8\FF\E0\00JFIF\00\00\00d\00d\00\00\FF\FE\00\border bs:0 bc:#000000 ps:0 pc:#ffffff es:0 ec:#000000 ck:feee6c715d26fd9f38b0ca4278c05026\FF\DB\00C\00P7\C9n5�\D6?\BD�\9Ds\EBp\9F[`8m\B7)o\B5\E8\E6I\99\FE3]]A2\BA\8Cw\D6E\93\\DEv\C8\009\F2\F1NI?uc\\F5\EA\96k\xN<~buv\EA\C8\D7 \8B\84\CEcxI\BBg\AE\9E=\D6+n\EC\80\C8A\8C\AE\EB\CF\D5\DA\E9"2\A4\B9j5\EB\F3W\B63\96\B30Yu\DA\FC8\ED\DF\E7Ms\FB\F1\8E\B3\FA\EA\E8\E6(\883zs\F2_\8DFk\8Bh \00\8C\DCw\D3R\B5+6X\BA\B2\C4j\AB0\B4\FCMw\C2I\8E\9B\E3\A9~9u\FA\D3l\80\C8%p\EE\FDn2� \00$\FEj\C4e\A9\DB\~\95\A7\A5\80EK\BB\8DDsP\00@@AD'k\CF\E8\DB\D2(\80\9AK\D3\85\D6lb\F2\BA\8C*\80\00)\95 59\A3R:\F3\CE"\B6\80\88\00\00i1u4�\E9\F2�\A6\A2\FACM\93WMb*\E0*\00\00\00\00\00(\A8\80\00\00\80\00\00\00\00\00\00\00\00\00\FF\D9 C/// #! /usr/bin/python3.6 """Conversions to/from quoted-printable transport encoding as per RFC 1521.""" # (Dec 1991 version). __all__ = ["encode", "decode", "encodestring", "decodestring"] ESCAPE = b'=' MAXLINESIZE = 76 HEX = b'0123456789ABCDEF' EMPTYSTRING = b'' try: from binascii import a2b_qp, b2a_qp except ImportError: a2b_qp = None b2a_qp = None def needsquoting(c, quotetabs, header): """Decide whether a particular byte ordinal needs to be quoted. The 'quotetabs' flag indicates whether embedded tabs and spaces should be quoted. Note that line-ending tabs and spaces are always encoded, as per RFC 1521. """ assert isinstance(c, bytes) if c in b' \t': return quotetabs # if header, we have to escape _ because _ is used to escape space if c == b'_': return header return c == ESCAPE or not (b' ' <= c <= b'~') def quote(c): """Quote a single character.""" assert isinstance(c, bytes) and len(c)==1 c = ord(c) return ESCAPE + bytes((HEX[c//16], HEX[c%16])) def encode(input, output, quotetabs, header=False): """Read 'input', apply quoted-printable encoding, and write to 'output'. 'input' and 'output' are binary file objects. The 'quotetabs' flag indicates whether embedded tabs and spaces should be quoted. Note that line-ending tabs and spaces are always encoded, as per RFC 1521. The 'header' flag indicates whether we are encoding spaces as _ as per RFC 1522.""" if b2a_qp is not None: data = input.read() odata = b2a_qp(data, quotetabs=quotetabs, header=header) output.write(odata) return def write(s, output=output, lineEnd=b'\n'): # RFC 1521 requires that the line ending in a space or tab must have # that trailing character encoded. if s and s[-1:] in b' \t': output.write(s[:-1] + quote(s[-1:]) + lineEnd) elif s == b'.': output.write(quote(s) + lineEnd) else: output.write(s + lineEnd) prevline = None while 1: line = input.readline() if not line: break outline = [] # Strip off any readline induced trailing newline stripped = b'' if line[-1:] == b'\n': line = line[:-1] stripped = b'\n' # Calculate the un-length-limited encoded line for c in line: c = bytes((c,)) if needsquoting(c, quotetabs, header): c = quote(c) if header and c == b' ': outline.append(b'_') else: outline.append(c) # First, write out the previous line if prevline is not None: write(prevline) # Now see if we need any soft line breaks because of RFC-imposed # length limitations. Then do the thisline->prevline dance. thisline = EMPTYSTRING.join(outline) while len(thisline) > MAXLINESIZE: # Don't forget to include the soft line break `=' sign in the # length calculation! write(thisline[:MAXLINESIZE-1], lineEnd=b'=\n') thisline = thisline[MAXLINESIZE-1:] # Write out the current line prevline = thisline # Write out the last line, without a trailing newline if prevline is not None: write(prevline, lineEnd=stripped) def encodestring(s, quotetabs=False, header=False): if b2a_qp is not None: return b2a_qp(s, quotetabs=quotetabs, header=header) from io import BytesIO infp = BytesIO(s) outfp = BytesIO() encode(infp, outfp, quotetabs, header) return outfp.getvalue() def decode(input, output, header=False): """Read 'input', apply quoted-printable decoding, and write to 'output'. 'input' and 'output' are binary file objects. If 'header' is true, decode underscore as space (per RFC 1522).""" if a2b_qp is not None: data = input.read() odata = a2b_qp(data, header=header) output.write(odata) return new = b'' while 1: line = input.readline() if not line: break i, n = 0, len(line) if n > 0 and line[n-1:n] == b'\n': partial = 0; n = n-1 # Strip trailing whitespace while n > 0 and line[n-1:n] in b" \t\r": n = n-1 else: partial = 1 while i < n: c = line[i:i+1] if c == b'_' and header: new = new + b' '; i = i+1 elif c != ESCAPE: new = new + c; i = i+1 elif i+1 == n and not partial: partial = 1; break elif i+1 < n and line[i+1:i+2] == ESCAPE: new = new + ESCAPE; i = i+2 elif i+2 < n and ishex(line[i+1:i+2]) and ishex(line[i+2:i+3]): new = new + bytes((unhex(line[i+1:i+3]),)); i = i+3 else: # Bad escape sequence -- leave it in new = new + c; i = i+1 if not partial: output.write(new + b'\n') new = b'' if new: output.write(new) def decodestring(s, header=False): if a2b_qp is not None: return a2b_qp(s, header=header) from io import BytesIO infp = BytesIO(s) outfp = BytesIO() decode(infp, outfp, header=header) return outfp.getvalue() # Other helper functions def ishex(c): """Return true if the byte ordinal 'c' is a hexadecimal digi