elph-ai 0.0.23

Unified LLM API with provider collections, auth resolution, and streaming
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

use anyhow::{Result, anyhow};
use url::Url;

use crate::types::ProviderEnv;
use crate::utils::provider_env::get_provider_env_value;

const DEFAULT_PROXY_PORTS: &[(&str, u16)] = &[
    ("ftp", 21),
    ("gopher", 70),
    ("http", 80),
    ("https", 443),
    ("ws", 80),
    ("wss", 443),
];

pub const UNSUPPORTED_PROXY_PROTOCOL_MESSAGE: &str =
    "Unsupported proxy protocol. SOCKS and PAC proxy URLs are not supported; use an HTTP or HTTPS proxy URL.";

fn get_proxy_env(key: &str, env: Option<&ProviderEnv>) -> String {
    let lowercase = key.to_lowercase();
    let uppercase = key.to_uppercase();

    if let Some(env) = env {
        if let Some(value) = env.get(&lowercase) {
            return value.clone();
        }
        if let Some(value) = env.get(&uppercase) {
            return value.clone();
        }
    }

    get_provider_env_value(&lowercase, None)
        .or_else(|| get_provider_env_value(&uppercase, None))
        .unwrap_or_default()
}

fn parse_proxy_target_url(target_url: &str) -> Option<Url> {
    Url::parse(target_url).ok()
}

fn default_port_for_protocol(protocol: &str) -> u16 {
    DEFAULT_PROXY_PORTS
        .iter()
        .find_map(|(name, port)| (*name == protocol).then_some(*port))
        .unwrap_or(0)
}

fn parse_no_proxy_entry(entry: &str) -> (String, u16) {
    if let Some((host, port_str)) = entry.rsplit_once(':')
        && let Ok(port) = port_str.parse::<u16>()
    {
        return (host.to_string(), port);
    }
    (entry.to_string(), 0)
}

fn should_proxy_hostname(hostname: &str, port: u16, env: Option<&ProviderEnv>) -> bool {
    let no_proxy = get_proxy_env("no_proxy", env).to_lowercase();
    if no_proxy.is_empty() {
        return true;
    }
    if no_proxy == "*" {
        return false;
    }

    no_proxy.split(|c: char| c == ',' || c.is_whitespace()).all(|proxy| {
        if proxy.is_empty() {
            return true;
        }

        let (mut proxy_hostname, proxy_port) = parse_no_proxy_entry(proxy);
        if proxy_port != 0 && proxy_port != port {
            return true;
        }

        let starts_with_wildcard = proxy_hostname.starts_with('.') || proxy_hostname.starts_with('*');
        if !starts_with_wildcard {
            return hostname != proxy_hostname;
        }

        if proxy_hostname.starts_with('*') {
            proxy_hostname = proxy_hostname[1..].to_string();
        }
        !hostname.ends_with(&proxy_hostname)
    })
}

fn get_proxy_for_url(target_url: &str, env: Option<&ProviderEnv>) -> String {
    let Some(parsed_url) = parse_proxy_target_url(target_url) else {
        return String::new();
    };

    let Some(protocol) = parsed_url.scheme().split(':').next() else {
        return String::new();
    };
    let Some(hostname) = parsed_url.host_str() else {
        return String::new();
    };

    let port = parsed_url.port().unwrap_or_else(|| default_port_for_protocol(protocol));
    if !should_proxy_hostname(hostname, port, env) {
        return String::new();
    }

    let protocol_proxy_key = format!("{protocol}_proxy");
    let mut proxy = get_proxy_env(&protocol_proxy_key, env);
    if proxy.is_empty() {
        proxy = get_proxy_env("all_proxy", env);
    }
    if proxy.is_empty() {
        return String::new();
    }
    if !proxy.contains("://") {
        proxy = format!("{protocol}://{proxy}");
    }
    proxy
}

/// Map a WebSocket URL to an HTTP(S) URL for proxy rule lookup (mirroring elph-ai Codex).
pub fn websocket_proxy_lookup_url(ws_url: &str) -> String {
    if let Some(rest) = ws_url.strip_prefix("wss://") {
        format!("https://{rest}")
    } else if let Some(rest) = ws_url.strip_prefix("ws://") {
        format!("http://{rest}")
    } else {
        ws_url.to_string()
    }
}

/// Resolve an HTTP or HTTPS proxy URL for `target_url` from scoped env and process env.
pub fn resolve_http_proxy_url_for_target(target_url: &str, env: Option<&ProviderEnv>) -> Result<Option<Url>> {
    let proxy = get_proxy_for_url(target_url, env);
    if proxy.is_empty() {
        return Ok(None);
    }

    let proxy_url = Url::parse(&proxy).map_err(|error| anyhow!("Invalid proxy URL {:?}: {error}", proxy))?;

    if proxy_url.scheme() != "http" && proxy_url.scheme() != "https" {
        return Err(anyhow!(
            "{UNSUPPORTED_PROXY_PROTOCOL_MESSAGE} Got {}:",
            proxy_url.scheme()
        ));
    }

    Ok(Some(proxy_url))
}