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287 lines
8.7 KiB
Rust
287 lines
8.7 KiB
Rust
use super::{
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patch_system_message, Client, ErnieClient, ExtraConfig, Model, ModelConfig, PromptType,
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ReplyHandler, SendData,
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};
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use crate::utils::PromptKind;
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use anyhow::{anyhow, bail, Context, Result};
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use async_trait::async_trait;
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use futures_util::StreamExt;
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use lazy_static::lazy_static;
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use reqwest::{Client as ReqwestClient, RequestBuilder};
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use reqwest_eventsource::{Error as EventSourceError, Event, RequestBuilderExt};
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use serde::Deserialize;
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use serde_json::{json, Value};
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use std::{env, sync::Mutex};
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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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const MODELS: [(&str, &str, usize, isize); 7] = [
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// https://cloud.baidu.com/doc/WENXINWORKSHOP/s/clntwmv7t
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(
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"ernie-4.0-8k",
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"/wenxinworkshop/chat/completions_pro",
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5120,
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2048,
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),
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(
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"ernie-3.5-8k",
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"/wenxinworkshop/chat/ernie-3.5-8k-0205",
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5120,
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2048,
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),
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(
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"ernie-3.5-4k",
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"/wenxinworkshop/chat/ernie-3.5-4k-0205",
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2048,
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2048,
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),
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(
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"ernie-speed-8k",
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"/wenxinworkshop/chat/ernie_speed",
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7168,
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2048,
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),
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(
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"ernie-speed-128k",
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"/wenxinworkshop/chat/ernie-speed-128k",
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124000,
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4096,
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),
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(
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"ernie-lite-8k",
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"/wenxinworkshop/chat/ernie-lite-8k",
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7168,
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2048,
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),
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(
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"ernie-tiny-8k",
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"/wenxinworkshop/chat/ernie-tiny-8k",
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7168,
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2048,
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),
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];
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lazy_static! {
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static ref ACCESS_TOKEN: Mutex<Option<String>> = Mutex::new(None);
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}
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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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#[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(&self, client: &ReqwestClient, data: SendData) -> Result<String> {
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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 ReplyHandler,
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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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impl ErnieClient {
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pub const PROMPTS: [PromptType<'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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pub fn list_models(local_config: &ErnieConfig) -> Vec<Model> {
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let client_name = Self::name(local_config);
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if local_config.models.is_empty() {
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MODELS
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.into_iter()
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.map(|(name, _, max_input_tokens, max_output_tokens)| {
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Model::new(client_name, name)
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.set_max_input_tokens(Some(max_input_tokens))
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.set_max_output_tokens(Some(max_output_tokens))
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}) // ERNIE tokenizer is different from cl100k_base
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.collect()
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} else {
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Model::from_config(client_name, &local_config.models)
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}
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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 model = &self.model.name;
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let (_, chat_endpoint, _, _) = MODELS
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.iter()
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.find(|(v, _, _, _)| v == model)
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.ok_or_else(|| anyhow!("Miss Model '{}'", self.model.id()))?;
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let access_token = ACCESS_TOKEN
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.lock()
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.unwrap()
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.clone()
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.ok_or_else(|| anyhow!("Failed to load access token"))?;
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let url = format!("{API_BASE}{chat_endpoint}?access_token={access_token}");
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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 ACCESS_TOKEN.lock().unwrap().is_none() {
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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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*ACCESS_TOKEN.lock().unwrap() = Some(token);
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}
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Ok(())
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}
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}
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async fn send_message(builder: RequestBuilder) -> Result<String> {
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let data: Value = builder.send().await?.json().await?;
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check_error(&data)?;
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let output = data["result"]
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.as_str()
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.ok_or_else(|| anyhow!("Unexpected response {data}"))?;
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Ok(output.to_string())
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}
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async fn send_message_streaming(builder: RequestBuilder, handler: &mut ReplyHandler) -> Result<()> {
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let mut es = builder.eventsource()?;
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while let Some(event) = es.next().await {
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match event {
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Ok(Event::Open) => {}
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Ok(Event::Message(message)) => {
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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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}
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Err(err) => {
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match err {
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EventSourceError::InvalidContentType(header_value, res) => {
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let content_type = header_value
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.to_str()
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.map_err(|_| anyhow!("Invalid response header"))?;
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if content_type.contains("application/json") {
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let data: Value = res.json().await?;
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check_error(&data)?;
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bail!("Request failed");
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} else {
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let text = res.text().await?;
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if let Some(text) = text.strip_prefix("data: ") {
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let data: Value = serde_json::from_str(text)?;
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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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} else {
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bail!("Invalid response data: {text}")
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}
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}
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}
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EventSourceError::StreamEnded => {}
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_ => {
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bail!("{}", err);
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}
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}
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es.close();
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}
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}
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}
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Ok(())
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}
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fn check_error(data: &Value) -> Result<()> {
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if let Some(err_msg) = data["error_msg"].as_str() {
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if let Some(code) = data["error_code"].as_number().and_then(|v| v.as_u64()) {
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if code == 110 {
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*ACCESS_TOKEN.lock().unwrap() = None;
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}
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bail!("{err_msg}. err_code: {code}");
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} else {
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bail!("{err_msg}");
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}
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}
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Ok(())
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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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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(temperature) = temperature {
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body["temperature"] = temperature.into();
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}
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if let Some(max_output_tokens) = model.max_output_tokens {
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body["max_output_tokens"] = max_output_tokens.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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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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