lean_ctx/proxy/
openai.rs

1use axum::{
2    body::Body,
3    extract::State,
4    http::{Request, StatusCode},
5    response::Response,
6};
7use serde_json::Value;
8
9use super::compress::compress_tool_result;
10use super::forward;
11use super::ProxyState;
12
13const UPSTREAM: &str = "https://api.openai.com";
14
15pub async fn handler(state: State<ProxyState>, req: Request<Body>) -> Result<Response, StatusCode> {
16    forward::forward_request(
17        state,
18        req,
19        UPSTREAM,
20        "/v1/chat/completions",
21        compress_request_body,
22        "OpenAI",
23        &[],
24    )
25    .await
26}
27
28fn compress_request_body(body: &[u8]) -> (Vec<u8>, usize, usize) {
29    let original_size = body.len();
30
31    let parsed: Value = match serde_json::from_slice(body) {
32        Ok(v) => v,
33        Err(_) => return (body.to_vec(), original_size, original_size),
34    };
35
36    let mut doc = parsed;
37    let mut modified = false;
38
39    if let Some(messages) = doc.get_mut("messages").and_then(|m| m.as_array_mut()) {
40        for msg in messages.iter_mut() {
41            let role = msg.get("role").and_then(|r| r.as_str()).unwrap_or("");
42            if role != "tool" {
43                continue;
44            }
45
46            if let Some(content) = msg
47                .get_mut("content")
48                .and_then(|c| c.as_str().map(String::from))
49            {
50                let compressed = compress_tool_result(&content, None);
51                if compressed.len() < content.len() {
52                    msg["content"] = Value::String(compressed);
53                    modified = true;
54                }
55            }
56        }
57    }
58
59    if !modified {
60        return (body.to_vec(), original_size, original_size);
61    }
62
63    match serde_json::to_vec(&doc) {
64        Ok(compressed) => {
65            let compressed_size = compressed.len();
66            (compressed, original_size, compressed_size)
67        }
68        Err(_) => (body.to_vec(), original_size, original_size),
69    }
70}
lean_ctx/proxy/openai.rs

lean_ctx/proxy/
openai.rs
