use std::io::Write;
use std::env;
use std::collections::btree_map::BTreeMap;
fn write_stderr( msg : String ) {
let mut stderr = std::io::stderr();
write!(&mut stderr, "{}", msg).unwrap();
}
fn write_stderr_s( msg : &str ) {
write_stderr( msg.to_string() );
}
fn write_stdout( msg : String ) {
let mut stdout = std::io::stdout();
write!(&mut stdout, "{}", msg).unwrap();
}
fn write_stdout_s( msg : &str ) {
write_stdout( msg.to_string() );
}
fn html_escape( msg : String ) -> String {
let mut copy : String = String::with_capacity( msg.len() );
for thechar in msg.chars() {
if thechar == '&' {
copy.push_str( "&" );
} else if thechar == '<' {
copy.push_str( "<" );
} else if thechar == '>' {
copy.push_str( ">" );
} else if thechar == '\"' {
copy.push_str( """ );
} else {
copy.push( thechar );
}
}
return copy;
}
fn main() {
write_stdout_s( "Status: 301 Moved Permanently\n" );
write_stdout_s( "Location: https://www.vg.no\n" );
write_stdout_s( "Content-type: text/html\n" );
write_stdout_s( "\n" );
write_stdout_s( "\n" );
write_stdout_s( " \n" );
write_stdout_s( " Rust CGI Test\n" );
write_stdout_s( " \n" );
write_stdout_s( " \n" );
write_stdout_s( " \n" );
write_stdout_s( " Environment
\n" );
write_stdout_s( " \n" );
write_stdout_s( " | Key | Value |
|---|
\n" );
// copy environment into a BTreeMap which is sorted
let mut sortedmap : BTreeMap = BTreeMap::new();
for (key, value) in env::vars() {
sortedmap.insert( key, value );
}
// output environment into HTML table
for (key, value) in sortedmap {
write_stdout(
format!(
" | {} | {} |
\n",
html_escape( key ),
html_escape( value )
)
);
}
write_stdout_s( "
\n" );
write_stdout_s( " \n" );
write_stdout_s( "\n" );
}