Today when using http get method parameters have Chinese and cause an error.
For example http://abc.com/abc?arg= Chinese, use http in erlang: request method fails.
Then check the specification of the url, url ascii characters to be used, thus wrote the following methods:
lists:append([io_lib:format("%~.16B", [E]) || E <- binary_to_list(unicode:characters_to_binary("中文"))])。Character conversion above appended to the end url on it.
Post method can refer to:
how to support chinese in http request body? erlang
Generating a random string of characters and numerals comprising:
randchar(N) ->
List = randchar(N, []),
lists:foldr(fun(X, Acc) ->
case X > 95 of
true ->
[X] ++ Acc;
false ->
integer_to_list(X) ++ Acc
end
end, [], List).
randchar(0, Acc) ->
Acc;
randchar(N, Acc) ->
randchar(N - 1, [randstr() | Acc]).
randstr() ->
case rand:uniform(9) > 5 of
true ->
rand:uniform(26) + 96;
false ->
rand:uniform(9)
end.Optimize it, or not good enough.
randchar(N) ->
lists:flatten(randchar(N, [])).
randchar(0, Acc) ->
Acc;
randchar(N, Acc) ->
randchar(N - 1, [randstr() | Acc]).
randstr() ->
case rand:uniform(9) > 5 of
true ->
[rand:uniform(26) + 96];
false ->
integer_to_list(rand:uniform(9))
end.Up in the morning, I suddenly thought, the letter is represented by the ascii code ascii code numbers Why not say then?
Test it, and she can do it, the code is as follows:
randchar(N) ->
randchar(N, []).
randchar(0, Acc) ->
Acc;
randchar(N, Acc) ->
randchar(N - 1, [randstr() | Acc]).
randstr() ->
case rand:uniform(9) > 5 of
true ->
rand:uniform(26) + 96;
false ->
rand:uniform(10) + 47
end.Because ascii 0 is 48, rand: uniform (10) is a minimum, the number 47 increments.
Reproduced in: https: //my.oschina.net/u/191928/blog/618642