questdb-rs 7.0.0

QuestDB Client Library for Rust
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147

/*******************************************************************************
 *     ___                  _   ____  ____
 *    / _ \ _   _  ___  ___| |_|  _ \| __ )
 *   | | | | | | |/ _ \/ __| __| | | |  _ \
 *   | |_| | |_| |  __/\__ \ |_| |_| | |_) |
 *    \__\_\\__,_|\___||___/\__|____/|____/
 *
 *  Copyright (c) 2014-2019 Appsicle
 *  Copyright (c) 2019-2025 QuestDB
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 *
 ******************************************************************************/

use crate::error;
use dns_lookup::{AddrInfo, AddrInfoHints, AddrInfoIter, LookupError};
use socket2::SockAddr;

#[cfg(unix)]
use libc::AF_INET;
#[cfg(all(unix, feature = "sync-sender-qwp-udp"))]
use libc::SOCK_DGRAM;
#[cfg(all(unix, feature = "sync-sender-tcp"))]
use libc::SOCK_STREAM;

#[cfg(windows)]
use windows_sys::Win32::Networking::WinSock::AF_INET;
#[cfg(all(windows, feature = "sync-sender-qwp-udp"))]
use windows_sys::Win32::Networking::WinSock::SOCK_DGRAM;
#[cfg(all(windows, feature = "sync-sender-tcp"))]
use windows_sys::Win32::Networking::WinSock::SOCK_STREAM;

#[cfg(unix)]
const ADDR_FAMILY_INET: i32 = AF_INET;
#[cfg(windows)]
const ADDR_FAMILY_INET: i32 = AF_INET as i32;

fn map_getaddrinfo_result(
    dest: &str,
    result: Result<AddrInfoIter, LookupError>,
) -> crate::Result<SockAddr> {
    match result {
        Ok(mut addrs) => map_first_addrinfo(dest, addrs.next()),
        Err(lookup_err) => {
            let io_err: std::io::Error = lookup_err.into();
            Err(error::fmt!(
                CouldNotResolveAddr,
                "Could not resolve {:?}: {}",
                dest,
                io_err
            ))
        }
    }
}

fn map_first_addrinfo(
    dest: &str,
    result: Option<std::io::Result<AddrInfo>>,
) -> crate::Result<SockAddr> {
    match result {
        Some(Ok(addr)) => Ok(addr.sockaddr.into()),
        Some(Err(io_err)) => Err(error::fmt!(
            CouldNotResolveAddr,
            "Could not resolve {:?}: {}",
            dest,
            io_err
        )),
        None => Err(error::fmt!(
            CouldNotResolveAddr,
            "Could not resolve {:?}: no addresses returned",
            dest
        )),
    }
}

#[cfg(feature = "sync-sender-tcp")]
pub(super) fn resolve_host(host: &str) -> super::Result<SockAddr> {
    resolve_host_with_socktype(host, SOCK_STREAM)
}

#[cfg(feature = "sync-sender-qwp-udp")]
pub(super) fn resolve_host_udp(host: &str) -> super::Result<SockAddr> {
    resolve_host_with_socktype(host, SOCK_DGRAM)
}

fn resolve_host_with_socktype(host: &str, socktype: i32) -> super::Result<SockAddr> {
    let hints = AddrInfoHints {
        socktype,
        address: ADDR_FAMILY_INET,
        ..AddrInfoHints::default()
    };
    map_getaddrinfo_result(host, dns_lookup::getaddrinfo(Some(host), None, Some(hints)))
}

#[cfg(feature = "sync-sender-tcp")]
pub(super) fn resolve_host_port(host: &str, port: &str) -> super::Result<SockAddr> {
    resolve_host_port_with_socktype(host, port, SOCK_STREAM)
}

#[cfg(feature = "sync-sender-qwp-udp")]
pub(super) fn resolve_host_port_udp(host: &str, port: &str) -> super::Result<SockAddr> {
    resolve_host_port_with_socktype(host, port, SOCK_DGRAM)
}

fn resolve_host_port_with_socktype(
    host: &str,
    port: &str,
    socktype: i32,
) -> super::Result<SockAddr> {
    let hints = AddrInfoHints {
        socktype,
        address: ADDR_FAMILY_INET,
        ..AddrInfoHints::default()
    };
    let host_port = format!("{host}:{port}");
    map_getaddrinfo_result(
        &host_port,
        dns_lookup::getaddrinfo(Some(host), Some(port), Some(hints)),
    )
}

#[cfg(test)]
mod tests {
    use super::*;
    use crate::ErrorCode;

    #[test]
    fn empty_getaddrinfo_result_is_error() {
        let err = map_first_addrinfo("example.invalid:9009", None).unwrap_err();

        assert_eq!(err.code(), ErrorCode::CouldNotResolveAddr);
        assert!(
            err.msg()
                .contains("Could not resolve \"example.invalid:9009\": no addresses returned")
        );
    }
}