mirror of https://github.com/sigoden/aichat
feat: support Qianwen (#211)
parent
ec1f99fbf5
commit
7627771e2d
@ -0,0 +1,160 @@
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use super::{QianwenClient, Client, ExtraConfig, PromptType, SendData, Model};
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use crate::{
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config::GlobalConfig,
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render::ReplyHandler,
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utils::PromptKind,
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};
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use anyhow::{anyhow, bail, Result};
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use async_trait::async_trait;
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use futures_util::StreamExt;
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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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const API_URL: &str =
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"https://dashscope.aliyuncs.com/api/v1/services/aigc/text-generation/generation";
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const MODELS: [(&str, usize); 2] = [("qwen-turbo", 6144), ("qwen-plus", 6144)];
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#[derive(Debug, Clone, Deserialize, Default)]
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pub struct QianwenConfig {
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pub name: Option<String>,
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pub api_key: Option<String>,
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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 QianwenClient {
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fn config(&self) -> (&GlobalConfig, &Option<ExtraConfig>) {
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(&self.global_config, &self.config.extra)
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}
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async fn send_message_inner(&self, client: &ReqwestClient, data: SendData) -> Result<String> {
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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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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 QianwenClient {
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config_get_fn!(api_key, get_api_key);
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pub const PROMPTS: [PromptType<'static>; 1] =
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[("api_key", "API Key:", true, PromptKind::String)];
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pub fn list_models(local_config: &QianwenConfig, client_index: usize) -> Vec<Model> {
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let client_name = Self::name(local_config);
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MODELS
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.into_iter()
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.map(|(name, max_tokens)| Model::new(client_index, client_name, name).set_max_tokens(Some(max_tokens)))
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.collect()
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}
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fn request_builder(&self, client: &ReqwestClient, data: SendData) -> Result<RequestBuilder> {
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let api_key = self.get_api_key()?;
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let stream = data.stream;
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let body = build_body(data, self.model.llm_name.clone());
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let mut builder = client.post(API_URL).bearer_auth(api_key).json(&body);
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if stream {
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builder = builder.header("X-DashScope-SSE", "enable");
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}
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Ok(builder)
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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["output"]["text"].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(
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builder: RequestBuilder,
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handler: &mut ReplyHandler,
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) -> Result<()> {
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let mut es = builder.eventsource()?;
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let mut offset = 0;
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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["output"]["text"].as_str() {
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let text = &text[offset..];
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handler.text(text)?;
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offset += text.len();
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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::InvalidStatusCode(_, res) => {
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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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}
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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(code) = data["code"].as_str() {
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if let Some(message) = data["message"].as_str() {
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bail!("{message}");
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} else {
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bail!("{code}");
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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: String) -> Value {
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let SendData {
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messages,
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temperature,
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stream: _,
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} = data;
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let mut parameters = json!({});
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if let Some(v) = temperature {
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parameters["temperature"] = v.into();
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}
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json!({
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"model": model,
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"input": json!({
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"messages": messages,
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}),
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"parameters": parameters
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})
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}
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