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use super::{
maybe_catch_error, patch_system_message, sse_stream, Client, CompletionDetails, ErnieClient,
ExtraConfig, Model, ModelConfig, PromptType, SendData, SsMmessage, SseHandler,
};
use crate::utils::PromptKind;
use anyhow::{anyhow, Context, Result};
use async_trait::async_trait;
use chrono::Utc;
use reqwest::{Client as ReqwestClient, RequestBuilder};
use serde::Deserialize;
use serde_json::{json, Value};
use std::env;
const API_BASE: &str = "https://aip.baidubce.com/rpc/2.0/ai_custom/v1";
const ACCESS_TOKEN_URL: &str = "https://aip.baidubce.com/oauth/2.0/token";
static mut ACCESS_TOKEN: (String, i64) = (String::new(), 0);
#[derive(Debug, Clone, Deserialize, Default)]
pub struct ErnieConfig {
pub name: Option<String>,
pub api_key: Option<String>,
pub secret_key: Option<String>,
#[serde(default)]
pub models: Vec<ModelConfig>,
pub extra: Option<ExtraConfig>,
}
impl ErnieClient {
pub const PROMPTS: [PromptType<'static>; 2] = [
("api_key", "API Key:", true, PromptKind::String),
("secret_key", "Secret Key:", true, PromptKind::String),
];
fn request_builder(&self, client: &ReqwestClient, data: SendData) -> Result<RequestBuilder> {
let body = build_body(data, &self.model);
let url = format!(
"{API_BASE}/wenxinworkshop/chat/{}?access_token={}",
&self.model.name,
unsafe { &ACCESS_TOKEN.0 }
);
debug!("Ernie Request: {url} {body}");
let builder = client.post(url).json(&body);
Ok(builder)
}
async fn prepare_access_token(&self) -> Result<()> {
if unsafe { ACCESS_TOKEN.0.is_empty() || Utc::now().timestamp() > ACCESS_TOKEN.1 } {
let env_prefix = Self::name(&self.config).to_uppercase();
let api_key = self.config.api_key.clone();
let api_key = api_key
.or_else(|| env::var(format!("{env_prefix}_API_KEY")).ok())
.ok_or_else(|| anyhow!("Miss api_key"))?;
let secret_key = self.config.secret_key.clone();
let secret_key = secret_key
.or_else(|| env::var(format!("{env_prefix}_SECRET_KEY")).ok())
.ok_or_else(|| anyhow!("Miss secret_key"))?;
let client = self.build_client()?;
let token = fetch_access_token(&client, &api_key, &secret_key)
.await
.with_context(|| "Failed to fetch access token")?;
unsafe { ACCESS_TOKEN = (token, 86400) };
}
Ok(())
}
}
#[async_trait]
impl Client for ErnieClient {
client_common_fns!();
async fn send_message_inner(
&self,
client: &ReqwestClient,
data: SendData,
) -> Result<(String, CompletionDetails)> {
self.prepare_access_token().await?;
let builder = self.request_builder(client, data)?;
send_message(builder).await
}
async fn send_message_streaming_inner(
&self,
client: &ReqwestClient,
handler: &mut SseHandler,
data: SendData,
) -> Result<()> {
self.prepare_access_token().await?;
let builder = self.request_builder(client, data)?;
send_message_streaming(builder, handler).await
}
}
async fn send_message(builder: RequestBuilder) -> Result<(String, CompletionDetails)> {
let data: Value = builder.send().await?.json().await?;
maybe_catch_error(&data)?;
extract_completion_text(&data)
}
async fn send_message_streaming(builder: RequestBuilder, handler: &mut SseHandler) -> Result<()> {
let handle = |message: SsMmessage| -> Result<bool> {
let data: Value = serde_json::from_str(&message.data)?;
if let Some(text) = data["result"].as_str() {
handler.text(text)?;
}
Ok(false)
};
sse_stream(builder, handle).await
}
fn build_body(data: SendData, model: &Model) -> Value {
let SendData {
mut messages,
temperature,
top_p,
stream,
} = data;
patch_system_message(&mut messages);
let mut body = json!({
"messages": messages,
});
if let Some(v) = model.max_output_tokens {
body["max_output_tokens"] = v.into();
}
if let Some(v) = temperature {
body["temperature"] = v.into();
}
if let Some(v) = top_p {
body["top_p"] = v.into();
}
if stream {
body["stream"] = true.into();
}
body
}
fn extract_completion_text(data: &Value) -> Result<(String, CompletionDetails)> {
let text = data["result"]
.as_str()
.ok_or_else(|| anyhow!("Invalid response data: {data}"))?;
let details = CompletionDetails {
id: data["id"].as_str().map(|v| v.to_string()),
input_tokens: data["usage"]["prompt_tokens"].as_u64(),
output_tokens: data["usage"]["completion_tokens"].as_u64(),
};
Ok((text.to_string(), details))
}
async fn fetch_access_token(
client: &reqwest::Client,
api_key: &str,
secret_key: &str,
) -> Result<String> {
let url = format!("{ACCESS_TOKEN_URL}?grant_type=client_credentials&client_id={api_key}&client_secret={secret_key}");
let value: Value = client.get(&url).send().await?.json().await?;
let result = value["access_token"].as_str().ok_or_else(|| {
if let Some(err_msg) = value["error_description"].as_str() {
anyhow!("{err_msg}")
} else {
anyhow!("Invalid response data")
}
})?;
Ok(result.to_string())
}
|
