3 # Copyright 2018 Paul Hänsch
5 # This is a file format helper, part of CGIlite.
7 # CGIlite is free software: you can redistribute it and/or modify
8 # it under the terms of the GNU Affero General Public License as published by
9 # the Free Software Foundation, either version 3 of the License, or
10 # (at your option) any later version.
12 # CGIlite is distributed in the hope that it will be useful,
13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 # GNU Affero General Public License for more details.
17 # You should have received a copy of the GNU Affero General Public License
18 # along with CGIlite. If not, see <http://www.gnu.org/licenses/>.
20 # ksh and zsh workaround
22 zsh) setopt -o OCTAL_ZEROES 2>&- ;; # zsh, mostly ignored by other shells
23 ksh) set -o posix ;; # ksh, will crash most other shells
27 # Store fields from a HTTP GET or POST string in a file
28 # usage: STORE "${QUERY_STRING}"
29 # or: STORE "$(head -n $HTTP_CONTENT_LENGTH)"
30 # backslashes and newline characters will be escaped in field values,
31 # the escape symbol is a backslash
32 # hexadecimal character descriptions (%00 - %FF) will be expanded
33 # the + character will be converted to [space]
34 # one line in the output corresponds to exactly one field, so you can
35 # use grep to filter which fields of a query should be stored
38 | sed -r ':X; $bY; N; bX; :Y;
39 s;\+; ;g; s;(\\|5[Cc]);\\\\\\\\;g; s;(\n|%0[Aa]);\\\\n;g; s;(^|&)([^=]+)=;\1\2:;g; s;&;\n;g;
40 s;^\n+;;; s;$;\\n;; s;\n+;\n;g;
41 # Hexadecimal { %00 - %FF } will be transformed to octal { \000 - \377 } for posix printf
42 s;%[0123].;&\\0;g; s;%[4567].;&\\1;g; s;%[89AB].;&\\2;g; s;%[CDEF].;&\\3;g;
43 s;%[048C][0-7]\\.;&0;g; s;%[048C][89A-F]\\.;&1;g; s;%[159D][0-7]\\.;&2;g; s;%[159D][89A-F]\\.;&3;g;
44 s;%[26AE][0-7]\\.;&4;g; s;%[26AE][89A-F]\\.;&5;g; s;%[37BF][0-7]\\.;&6;g; s;%[37BF][89A-F]\\.;&7;g;
45 s;%.[08](\\..);\10;g; s;%.[19](\\..);\11;g; s;%.[2A](\\..);\12;g; s;%.[3B](\\..);\13;g;
46 s;%.[4C](\\..);\14;g; s;%.[5D](\\..);\15;g; s;%.[6E](\\..);\16;g; s;%.[7F](\\..);\17;g;
52 # read a file written by STORE and assign all fields to variables
53 # usage: eval "$(LOAD <file)"
55 # fields will be assigned to shell variables of the same name, but with the following constraints:
56 # * small letters will be converted to capitals
57 # * all non-alphanumeric characters will be converted to underscore (_)
58 # * an underscore will be prepended
59 # as a consequence variable names are guaranteed to match the regex /_[A-Z0-9_]+/
61 # field values may contain any character, proper escaping for safe use in eval is taken care of
62 # Your shell may or may not purge certain binary characters from variable values during processing
64 sed -r 'h; s;^[^:]+:;;
65 s;'\'';'\''\\'\'\'';g;
69 y;abcdefghijklmnopqrstuvwxyz;ABCDEFGHIJKLMNOPQRSTUVWXYZ;
70 s;[^A-Z0-9_];_;g; s;^.*$;_&=;;
71 G; s;^([A-Z0-9_]+=)\n;\1;;