Question

So I’m trying to encode a multiline string and send over HTTP to the server, I am encoding this string:

#include <stdio.h>
int main(void) 
{
     printf(\"Code Cabana!\");
     return 0;
}

and when I NSLog it I get this:

151657384nclude23Cstdio.h3.825303E-2990X1.242D78P-1047220220220220220220220220220220220220 0nt2ain(void)27B0X1.16BC009216BCP-877220220220220220220220220220220220220220220 0xe7fe00rintf(硨ode⭸abana!2;2202202202202202202202202202202202202202202eturn222022022022022022022022022022022022020A15203843

I’m using this code to encode it:

NSString *urlCode = [[NSString stringWithFormat:@"#include <stdio.h>\n int main(void){\nprintf(\"Code Cabana!\");return 0;\n}"] stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];

Answer 1

Don’t use NSLog(urlCode), use NSLog(@"%@", urlCode) like you should.

When you do that, your C source, URL-encoded in UTF-8, looks like this:

%23include%20%3Cstdio.h%3E%0A%20int%20main(void)%7B%0Aprintf(%22Code%20Cabana!%22);return%200;%0A%7D

which is probably what you are after.

May I just say that there are huge security implications in sending C source code over the wire to a compiler, unless you never execute the compiled code.

As for the compiler failing, %22 is the straight quote ", so the other quote could be a copy-paste from a “smart” editor at your end.