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218 lines
7.1 KiB
Rust
218 lines
7.1 KiB
Rust
use super::{
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patch_system_message, ClaudeClient, Client, ExtraConfig, ImageUrl, MessageContent,
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MessageContentPart, Model, ModelConfig, PromptType, ReplyHandler, SendData,
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};
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use crate::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 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_BASE: &str = "https://api.anthropic.com/v1/messages";
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const MODELS: [(&str, usize, &str); 3] = [
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// https://docs.anthropic.com/claude/docs/models-overview
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("claude-3-opus-20240229", 200000, "text,vision"),
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("claude-3-sonnet-20240229", 200000, "text,vision"),
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("claude-3-haiku-20240307", 200000, "text,vision"),
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];
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#[derive(Debug, Clone, Deserialize)]
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pub struct ClaudeConfig {
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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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#[async_trait]
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impl Client for ClaudeClient {
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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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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 ClaudeClient {
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list_models_fn!(ClaudeConfig, &MODELS);
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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:", false, PromptKind::String)];
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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)?;
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let url = API_BASE;
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debug!("Claude Request: {url} {body}");
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let mut builder = client.post(url).json(&body);
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builder = builder.header("anthropic-version", "2023-06-01");
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if let Some(api_key) = api_key {
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builder = builder.header("x-api-key", 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 data: Value = builder.send().await?.json().await?;
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check_error(&data)?;
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let output = data["content"][0]["text"]
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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 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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check_error(&data)?;
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if let Some(typ) = data["type"].as_str() {
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if typ == "content_block_delta" {
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if let Some(text) = data["delta"]["text"].as_str() {
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handler.text(text)?;
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}
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}
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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::StreamEnded => {}
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EventSourceError::InvalidStatusCode(code, res) => {
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let text = res.text().await?;
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let data: Value = match text.parse() {
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Ok(data) => data,
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Err(_) => {
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bail!("Request failed, {code}, {text}");
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}
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};
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check_error(&data)?;
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bail!("Request failed, {code}, {text}");
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}
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EventSourceError::InvalidContentType(_, res) => {
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let text = res.text().await?;
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bail!("The API server should return data as 'text/event-stream', but it isn't. Check the client config. {text}");
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}
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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 build_body(data: SendData, model: &Model) -> 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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let content = match message.content {
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MessageContent::Text(text) => vec![json!({"type": "text", "text": text})],
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MessageContent::Array(list) => list
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.into_iter()
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.map(|item| match item {
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MessageContentPart::Text { text } => json!({"type": "text", "text": text}),
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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((mime_type, 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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json!({
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"type": "image",
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"source": {
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"type": "base64",
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"media_type": mime_type,
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"data": data,
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}
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})
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} else {
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network_image_urls.push(url.clone());
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json!({ "url": url })
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}
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}
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})
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.collect(),
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};
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json!({ "role": role, "content": content })
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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 max_tokens = model.max_output_tokens.unwrap_or(4096);
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let mut body = json!({
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"model": &model.name,
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"max_tokens": max_tokens,
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"messages": messages,
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});
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if let Some(v) = temperature {
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body["temperature"] = v.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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Ok(body)
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}
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fn check_error(data: &Value) -> Result<()> {
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if let Some(error) = data["error"].as_object() {
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if let (Some(typ), Some(message)) = (error["type"].as_str(), error["message"].as_str()) {
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bail!("{typ}: {message}");
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} else {
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bail!("{}", Value::Object(error.clone()))
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}
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}
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Ok(())
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}
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