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use super::{QianwenClient, Client, ExtraConfig, PromptType, SendData, Model};
use crate::{
config::GlobalConfig,
render::ReplyHandler,
utils::PromptKind,
};
use anyhow::{anyhow, bail, Result};
use async_trait::async_trait;
use futures_util::StreamExt;
use reqwest::{Client as ReqwestClient, RequestBuilder};
use reqwest_eventsource::{Error as EventSourceError, Event, RequestBuilderExt};
use serde::Deserialize;
use serde_json::{json, Value};
const API_URL: &str =
"https://dashscope.aliyuncs.com/api/v1/services/aigc/text-generation/generation";
const MODELS: [(&str, usize); 2] = [("qwen-turbo", 6144), ("qwen-plus", 6144)];
#[derive(Debug, Clone, Deserialize, Default)]
pub struct QianwenConfig {
pub name: Option<String>,
pub api_key: Option<String>,
pub extra: Option<ExtraConfig>,
}
#[async_trait]
impl Client for QianwenClient {
fn config(&self) -> (&GlobalConfig, &Option<ExtraConfig>) {
(&self.global_config, &self.config.extra)
}
async fn send_message_inner(&self, client: &ReqwestClient, data: SendData) -> Result<String> {
let builder = self.request_builder(client, data)?;
send_message(builder).await
}
async fn send_message_streaming_inner(
&self,
client: &ReqwestClient,
handler: &mut ReplyHandler,
data: SendData,
) -> Result<()> {
let builder = self.request_builder(client, data)?;
send_message_streaming(builder, handler).await
}
}
impl QianwenClient {
config_get_fn!(api_key, get_api_key);
pub const PROMPTS: [PromptType<'static>; 1] =
[("api_key", "API Key:", true, PromptKind::String)];
pub fn list_models(local_config: &QianwenConfig) -> Vec<Model> {
let client_name = Self::name(local_config);
MODELS
.into_iter()
.map(|(name, max_tokens)| Model::new(client_name, name).set_max_tokens(Some(max_tokens)))
.collect()
}
fn request_builder(&self, client: &ReqwestClient, data: SendData) -> Result<RequestBuilder> {
let api_key = self.get_api_key()?;
let stream = data.stream;
let body = build_body(data, self.model.name.clone());
debug!("Qianwen Request: {API_URL} {body}");
let mut builder = client.post(API_URL).bearer_auth(api_key).json(&body);
if stream {
builder = builder.header("X-DashScope-SSE", "enable");
}
Ok(builder)
}
}
async fn send_message(builder: RequestBuilder) -> Result<String> {
let data: Value = builder.send().await?.json().await?;
check_error(&data)?;
let output = data["output"]["text"].as_str()
.ok_or_else(|| anyhow!("Unexpected response {data}"))?;
Ok(output.to_string())
}
async fn send_message_streaming(
builder: RequestBuilder,
handler: &mut ReplyHandler,
) -> Result<()> {
let mut es = builder.eventsource()?;
while let Some(event) = es.next().await {
match event {
Ok(Event::Open) => {}
Ok(Event::Message(message)) => {
let data: Value = serde_json::from_str(&message.data)?;
if let Some(text) = data["output"]["text"].as_str() {
handler.text(text)?;
}
}
Err(err) => {
match err {
EventSourceError::InvalidStatusCode(_, res) => {
let data: Value = res.json().await?;
check_error(&data)?;
bail!("Request failed");
}
EventSourceError::StreamEnded => {}
_ => {
bail!("{}", err);
}
}
es.close();
}
}
}
Ok(())
}
fn check_error(data: &Value) -> Result<()> {
if let Some(code) = data["code"].as_str() {
if let Some(message) = data["message"].as_str() {
bail!("{message}");
} else {
bail!("{code}");
}
}
Ok(())
}
fn build_body(data: SendData, model: String) -> Value {
let SendData {
messages,
temperature,
stream,
} = data;
let mut parameters = json!({});
if stream {
parameters["incremental_output"] = true.into();
}
if let Some(v) = temperature {
parameters["temperature"] = v.into();
}
json!({
"model": model,
"input": json!({
"messages": messages,
}),
"parameters": parameters
})
}
|
