mirror of https://github.com/sigoden/aichat
feat: support replicate client (#466)
sigoden
3 weeks ago
committed by
GitHub
parent
4d4a100fe6
commit
50eac8b594
@ -0,0 +1,193 @@
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use std::time::Duration;
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use super::{
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catch_error, generate_prompt, smart_prompt_format, sse_stream, Client, CompletionDetails,
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ExtraConfig, Model, ModelConfig, PromptType, ReplicateClient, SendData, SsMmessage, SseHandler,
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};
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use crate::utils::PromptKind;
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use anyhow::{anyhow, Result};
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use async_trait::async_trait;
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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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const API_BASE: &str = "https://api.replicate.com/v1";
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#[derive(Debug, Clone, Deserialize, Default)]
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pub struct ReplicateConfig {
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pub name: Option<String>,
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pub api_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 ReplicateClient {
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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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fn request_builder(
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&self,
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client: &ReqwestClient,
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data: SendData,
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api_key: &str,
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) -> Result<RequestBuilder> {
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let body = build_body(data, &self.model)?;
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let url = format!("{API_BASE}/models/{}/predictions", self.model.name);
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debug!("Replicate Request: {url} {body}");
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let builder = client.post(url).bearer_auth(api_key).json(&body);
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Ok(builder)
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}
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}
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#[async_trait]
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impl Client for ReplicateClient {
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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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let api_key = self.get_api_key()?;
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let builder = self.request_builder(client, data, &api_key)?;
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send_message(client, builder, &api_key).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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let api_key = self.get_api_key()?;
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let builder = self.request_builder(client, data, &api_key)?;
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send_message_streaming(client, builder, handler).await
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}
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}
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async fn send_message(
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client: &ReqwestClient,
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builder: RequestBuilder,
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api_key: &str,
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) -> Result<(String, CompletionDetails)> {
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let res = builder.send().await?;
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let status = res.status();
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let data: Value = res.json().await?;
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if !status.is_success() {
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catch_error(&data, status.as_u16())?;
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}
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let prediction_url = data["urls"]["get"]
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.as_str()
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.ok_or_else(|| anyhow!("Invalid response data: {data}"))?;
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loop {
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tokio::time::sleep(Duration::from_millis(500)).await;
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let prediction_data: Value = client
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.get(prediction_url)
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.bearer_auth(api_key)
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.send()
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.await?
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.json()
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.await?;
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let err = || anyhow!("Invalid response data: {prediction_data}");
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let status = prediction_data["status"].as_str().ok_or_else(err)?;
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if status == "succeeded" {
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return extract_completion(&prediction_data);
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} else if status == "failed" || status == "canceled" {
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return Err(err());
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}
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}
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}
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async fn send_message_streaming(
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client: &ReqwestClient,
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builder: RequestBuilder,
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handler: &mut SseHandler,
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) -> Result<()> {
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let res = builder.send().await?;
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let status = res.status();
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let data: Value = res.json().await?;
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if !status.is_success() {
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catch_error(&data, status.as_u16())?;
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}
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let stream_url = data["urls"]["stream"]
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.as_str()
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.ok_or_else(|| anyhow!("Invalid response data: {data}"))?;
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let sse_builder = client.get(stream_url).header("accept", "text/event-stream");
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let handle = |message: SsMmessage| -> Result<bool> {
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if message.event == "done" {
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return Ok(true);
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}
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handler.text(&message.data)?;
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Ok(false)
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};
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sse_stream(sse_builder, handle).await
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}
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fn build_body(data: SendData, model: &Model) -> Result<Value> {
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let SendData {
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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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let prompt = generate_prompt(&messages, smart_prompt_format(&model.name))?;
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let mut input = json!({
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"prompt": prompt,
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"prompt_template": "{prompt}"
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});
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if let Some(v) = model.max_output_tokens {
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input["max_tokens"] = v.into();
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input["max_new_tokens"] = v.into();
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}
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if let Some(v) = temperature {
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input["temperature"] = v.into();
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}
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if let Some(v) = top_p {
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input["top_p"] = v.into();
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}
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let mut body = json!({
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"input": input,
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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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Ok(body)
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}
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fn extract_completion(data: &Value) -> Result<(String, CompletionDetails)> {
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let text = data["output"]
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.as_array()
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.map(|parts| {
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parts
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.iter()
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.filter_map(|v| v.as_str().map(|v| v.to_string()))
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.collect::<Vec<String>>()
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.join("")
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})
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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["metrics"]["input_token_count"].as_u64(),
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output_tokens: data["metrics"]["output_token_count"].as_u64(),
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};
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Ok((text.to_string(), details))
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}
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