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