mirror of https://github.com/sigoden/aichat
feat: support ollama (#276)
sigoden
6 months ago
committed by
GitHub
parent
6c9d7a679e
commit
64c4edf7c8
@ -0,0 +1,209 @@
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use super::{
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message::*, patch_system_message, Client, ExtraConfig, Model, OllamaClient, PromptType,
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SendData, TokensCountFactors,
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};
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use crate::{config::GlobalConfig, render::ReplyHandler, utils::PromptKind};
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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 serde::Deserialize;
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use serde_json::{json, Value};
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const TOKENS_COUNT_FACTORS: TokensCountFactors = (5, 2);
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#[derive(Debug, Clone, Deserialize, Default)]
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pub struct OllamaConfig {
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pub name: Option<String>,
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pub api_base: String,
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pub api_key: Option<String>,
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pub chat_endpoint: Option<String>,
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pub models: Vec<LocalAIModel>,
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pub extra: Option<ExtraConfig>,
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}
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#[derive(Debug, Clone, Deserialize)]
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pub struct LocalAIModel {
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name: String,
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max_tokens: Option<usize>,
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}
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#[async_trait]
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impl Client for OllamaClient {
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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 OllamaClient {
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config_get_fn!(api_key, get_api_key);
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pub const PROMPTS: [PromptType<'static>; 4] = [
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("api_base", "API Base:", true, PromptKind::String),
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("api_key", "API Key:", false, PromptKind::String),
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("models[].name", "Model Name:", true, PromptKind::String),
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(
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"models[].max_tokens",
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"Max Tokens:",
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false,
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PromptKind::Integer,
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),
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];
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pub fn list_models(local_config: &OllamaConfig) -> Vec<Model> {
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let client_name = Self::name(local_config);
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local_config
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.models
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.iter()
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.map(|v| {
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Model::new(client_name, &v.name)
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.set_max_tokens(v.max_tokens)
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.set_tokens_count_factors(TOKENS_COUNT_FACTORS)
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})
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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().ok();
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let body = build_body(data, self.model.name.clone())?;
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let chat_endpoint = self.config.chat_endpoint.as_deref().unwrap_or("/chat");
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let url = format!("{}{chat_endpoint}", self.config.api_base);
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debug!("Ollama Request: {url} {body}");
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let mut builder = client.post(url).json(&body);
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if let Some(api_key) = api_key {
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builder = builder.header("Authorization", api_key)
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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 res = builder.send().await?;
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let status = res.status();
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if status != 200 {
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let text = res.text().await?;
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bail!("{status}, {text}");
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}
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let data: Value = res.json().await?;
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let output = data["message"]["content"]
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.as_str()
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.ok_or_else(|| anyhow!("Invalid response data: {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 res = builder.send().await?;
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let status = res.status();
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if status != 200 {
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let text = res.text().await?;
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bail!("{status}, {text}");
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} else {
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let mut stream = res.bytes_stream();
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while let Some(chunk) = stream.next().await {
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let chunk = chunk?;
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let data: Value = serde_json::from_slice(&chunk)?;
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if data["done"].is_boolean() {
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if let Some(text) = data["message"]["content"].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: {data}")
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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 build_body(data: SendData, model: String) -> Result<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 network_image_urls = vec![];
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let messages: Vec<Value> = messages
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.into_iter()
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.map(|message| {
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let role = message.role;
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match message.content {
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MessageContent::Text(text) => json!({
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"role": role,
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"content": text,
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}),
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MessageContent::Array(list) => {
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let mut content = vec![];
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let mut images = vec![];
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for item in list {
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match item {
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MessageContentPart::Text { text } => {
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content.push(text);
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}
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MessageContentPart::ImageUrl {
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image_url: ImageUrl { url },
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} => {
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if let Some((_, data)) = url
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.strip_prefix("data:")
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.and_then(|v| v.split_once(";base64,"))
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{
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images.push(data.to_string());
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} else {
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network_image_urls.push(url.clone());
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}
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}
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}
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}
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let content = content.join("\n\n");
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json!({ "role": role, "content": content, "images": images })
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}
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}
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})
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.collect();
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if !network_image_urls.is_empty() {
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bail!(
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"The model does not support network images: {:?}",
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network_image_urls
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);
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}
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let mut body = json!({
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"model": model,
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"messages": messages,
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"stream": stream,
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});
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if let Some(temperature) = temperature {
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body["options"] = json!({
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"temperature": temperature,
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});
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}
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Ok(body)
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}
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