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// Copyright 2013 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
// xfail-test
extern mod std;
use std::net::tcp::TcpSocketBuf;
use core::io::{ReaderUtil,WriterUtil};
enum Result {
Nil,
Int(int),
Data(~[u8]),
List(~[Result]),
Error(~str),
Status(~str)
}
priv fn parse_data(len: uint, io: @io::Reader) -> Result {
let res =
if (len > 0) {
let bytes = io.read_bytes(len as uint);
assert!(bytes.len() == len);
Data(bytes)
} else {
Data(~[])
};
assert!(io.read_char() == '\r');
assert!(io.read_char() == '\n');
return res;
}
priv fn parse_list(len: uint, io: @io::Reader) -> Result {
let mut list: ~[Result] = ~[];
for len.times {
let v =
match io.read_char() {
'$' => parse_bulk(io),
':' => parse_int(io),
_ => fail!()
};
list.push(v);
}
return List(list);
}
priv fn chop(s: ~str) -> ~str {
s.slice(0, s.len() - 1).to_owned()
}
priv fn parse_bulk(io: @io::Reader) -> Result {
match int::from_str(chop(io.read_line())) {
None => fail!(),
Some(-1) => Nil,
Some(len) if len >= 0 => parse_data(len as uint, io),
Some(_) => fail!()
}
}
priv fn parse_multi(io: @io::Reader) -> Result {
match int::from_str(chop(io.read_line())) {
None => fail!(),
Some(-1) => Nil,
Some(0) => List(~[]),
Some(len) if len >= 0 => parse_list(len as uint, io),
Some(_) => fail!()
}
}
priv fn parse_int(io: @io::Reader) -> Result {
match int::from_str(chop(io.read_line())) {
None => fail!(),
Some(i) => Int(i)
}
}
priv fn parse_response(io: @io::Reader) -> Result {
match io.read_char() {
'$' => parse_bulk(io),
'*' => parse_multi(io),
'+' => Status(chop(io.read_line())),
'-' => Error(chop(io.read_line())),
':' => parse_int(io),
_ => fail!()
}
}
priv fn cmd_to_str(cmd: ~[~str]) -> ~str {
let mut res = ~"*";
str::push_str(&mut res, cmd.len().to_str());
str::push_str(&mut res, "\r\n");
for cmd.each |s| {
str::push_str(&mut res, str::concat(~[~"$", s.len().to_str(), ~"\r\n",
copy *s, ~"\r\n"]));
}
res
}
fn query(cmd: ~[~str], sb: TcpSocketBuf) -> Result {
let cmd = cmd_to_str(cmd);
//io::println(cmd);
sb.write_str(cmd);
let res = parse_response(@sb as @io::Reader);
//io::println(fmt!("%?", res));
res
}
fn query2(cmd: ~[~str]) -> Result {
let _cmd = cmd_to_str(cmd);
do io::with_str_reader(~"$3\r\nXXX\r\n") |sb| {
let res = parse_response(@sb as @io::Reader);
io::println(fmt!("%?", res));
res
}
}
fn main() {
}
|
