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use super::{patch_system_message, ClaudeClient, Client, ExtraConfig, Model, PromptType, SendData};
use crate::{
client::{ImageUrl, MessageContent, MessageContentPart},
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_BASE: &str = "https://api.anthropic.com/v1/messages";
const MODELS: [(&str, usize, &str); 3] = [
// https://docs.anthropic.com/claude/docs/models-overview
("claude-3-opus-20240229", 200000, "text,vision"),
("claude-3-sonnet-20240229", 200000, "text,vision"),
("claude-3-haiku-20240307", 200000, "text,vision"),
];
#[derive(Debug, Clone, Deserialize)]
pub struct ClaudeConfig {
pub name: Option<String>,
pub api_key: Option<String>,
pub extra: Option<ExtraConfig>,
}
#[async_trait]
impl Client for ClaudeClient {
client_common_fns!();
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 ClaudeClient {
config_get_fn!(api_key, get_api_key);
pub const PROMPTS: [PromptType<'static>; 1] =
[("api_key", "API Key:", false, PromptKind::String)];
pub fn list_models(local_config: &ClaudeConfig) -> Vec<Model> {
let client_name = Self::name(local_config);
MODELS
.into_iter()
.map(|(name, max_input_tokens, capabilities)| {
Model::new(client_name, name)
.set_capabilities(capabilities.into())
.set_max_input_tokens(Some(max_input_tokens))
})
.collect()
}
fn request_builder(&self, client: &ReqwestClient, data: SendData) -> Result<RequestBuilder> {
let api_key = self.get_api_key().ok();
let body = build_body(data, self.model.name.clone())?;
let url = API_BASE;
debug!("Claude Request: {url} {body}");
let mut builder = client.post(url).json(&body);
builder = builder.header("anthropic-version", "2023-06-01");
if let Some(api_key) = api_key {
builder = builder.header("x-api-key", api_key)
}
Ok(builder)
}
}
async fn send_message(builder: RequestBuilder) -> Result<String> {
let data: Value = builder.send().await?.json().await?;
check_error(&data)?;
let output = data["content"][0]["text"]
.as_str()
.ok_or_else(|| anyhow!("Invalid response data: {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)?;
check_error(&data)?;
if let Some(typ) = data["type"].as_str() {
if typ == "content_block_delta" {
if let Some(text) = data["delta"]["text"].as_str() {
handler.text(text)?;
}
}
}
}
Err(err) => {
match err {
EventSourceError::StreamEnded => {}
EventSourceError::InvalidStatusCode(code, res) => {
let data: Value = res.json().await?;
check_error(&data)?;
bail!("Invalid status code: {code}");
}
EventSourceError::InvalidContentType(_, res) => {
let text = res.text().await?;
bail!("The endpoint is invalid as the response content-type is not 'text/event-stream', {text}");
}
_ => {
bail!("{}", err);
}
}
es.close();
}
}
}
Ok(())
}
fn build_body(data: SendData, model: String) -> Result<Value> {
let SendData {
mut messages,
temperature,
stream,
} = data;
patch_system_message(&mut messages);
let mut network_image_urls = vec![];
let messages: Vec<Value> = messages
.into_iter()
.map(|message| {
let role = message.role;
let content = match message.content {
MessageContent::Text(text) => vec![json!({"type": "text", "text": text})],
MessageContent::Array(list) => list
.into_iter()
.map(|item| match item {
MessageContentPart::Text { text } => json!({"type": "text", "text": text}),
MessageContentPart::ImageUrl {
image_url: ImageUrl { url },
} => {
if let Some((mime_type, data)) = url
.strip_prefix("data:")
.and_then(|v| v.split_once(";base64,"))
{
json!({
"type": "image",
"source": {
"type": "base64",
"media_type": mime_type,
"data": data,
}
})
} else {
network_image_urls.push(url.clone());
json!({ "url": url })
}
}
})
.collect(),
};
json!({ "role": role, "content": content })
})
.collect();
if !network_image_urls.is_empty() {
bail!(
"The model does not support network images: {:?}",
network_image_urls
);
}
let mut body = json!({
"model": model,
"max_tokens": 4096,
"messages": messages,
});
if let Some(v) = temperature {
body["temperature"] = v.into();
}
if stream {
body["stream"] = true.into();
}
Ok(body)
}
fn check_error(data: &Value) -> Result<()> {
if let Some(error) = data["error"].as_object() {
if let (Some(typ), Some(message)) = (error["type"].as_str(), error["message"].as_str()) {
bail!("{typ}: {message}");
} else {
bail!("{}", Value::Object(error.clone()))
}
}
Ok(())
}
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