From 34041a976c0977d51123e6d5fefd944e222e2918 Mon Sep 17 00:00:00 2001
From: sigoden <sigoden@gmail.com>
Date: Mon, 29 Apr 2024 09:27:11 +0800
Subject: feat: support cloudflare client (#459)

---
 src/client/cloudflare.rs | 115 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 115 insertions(+)
 create mode 100644 src/client/cloudflare.rs

(limited to 'src/client/cloudflare.rs')

diff --git a/src/client/cloudflare.rs b/src/client/cloudflare.rs
new file mode 100644
index 0000000..09f020a
--- /dev/null
+++ b/src/client/cloudflare.rs
@@ -0,0 +1,115 @@
+use super::{
+    catch_error, sse_stream, CloudflareClient, CompletionDetails, ExtraConfig, Model, ModelConfig,
+    PromptType, SendData, SseHandler,
+};
+
+use crate::utils::PromptKind;
+
+use anyhow::{anyhow, Result};
+use reqwest::{Client as ReqwestClient, RequestBuilder};
+use serde::Deserialize;
+use serde_json::{json, Value};
+
+const API_BASE: &str = "https://api.cloudflare.com/client/v4";
+
+#[derive(Debug, Clone, Deserialize, Default)]
+pub struct CloudflareConfig {
+    pub name: Option<String>,
+    pub account_id: Option<String>,
+    pub api_key: Option<String>,
+    #[serde(default)]
+    pub models: Vec<ModelConfig>,
+    pub extra: Option<ExtraConfig>,
+}
+
+impl CloudflareClient {
+    config_get_fn!(account_id, get_account_id);
+    config_get_fn!(api_key, get_api_key);
+
+    pub const PROMPTS: [PromptType<'static>; 2] = [
+        ("account_id", "Account ID:", false, PromptKind::String),
+        ("api_key", "API Key:", false, PromptKind::String),
+    ];
+
+    fn request_builder(&self, client: &ReqwestClient, data: SendData) -> Result<RequestBuilder> {
+        let account_id = self.get_account_id()?;
+        let api_key = self.get_api_key()?;
+
+        let body = build_body(data, &self.model)?;
+
+        let url = format!(
+            "{API_BASE}/accounts/{account_id}/ai/run/{}",
+            self.model.name
+        );
+
+        debug!("Cloudflare Request: {url} {body}");
+
+        let builder = client.post(url).bearer_auth(api_key).json(&body);
+
+        Ok(builder)
+    }
+}
+
+impl_client_trait!(CloudflareClient, send_message, send_message_streaming);
+
+async fn send_message(builder: RequestBuilder) -> Result<(String, CompletionDetails)> {
+    let res = builder.send().await?;
+    let status = res.status();
+    let data: Value = res.json().await?;
+    if status != 200 {
+        catch_error(&data, status.as_u16())?;
+    }
+
+    extract_completion(&data)
+}
+
+async fn send_message_streaming(builder: RequestBuilder, handler: &mut SseHandler) -> Result<()> {
+    let handle = |data: &str| -> Result<bool> {
+        if data == "[DONE]" {
+            return Ok(true);
+        }
+        let data: Value = serde_json::from_str(data)?;
+        if let Some(text) = data["response"].as_str() {
+            handler.text(text)?;
+        }
+        Ok(false)
+    };
+    sse_stream(builder, handle).await
+}
+
+fn build_body(data: SendData, model: &Model) -> Result<Value> {
+    let SendData {
+        messages,
+        temperature,
+        top_p,
+        stream,
+    } = data;
+
+    let mut body = json!({
+        "model": &model.name,
+        "messages": messages,
+    });
+
+    if let Some(v) = model.max_output_tokens {
+        body["max_tokens"] = v.into();
+    }
+    if let Some(v) = temperature {
+        body["temperature"] = v.into();
+    }
+    if let Some(v) = top_p {
+        body["top_p"] = v.into();
+    }
+    if stream {
+        body["stream"] = true.into();
+    }
+
+    Ok(body)
+}
+
+fn extract_completion(data: &Value) -> Result<(String, CompletionDetails)> {
+    let text = data["result"]["response"]
+        .as_str()
+        .ok_or_else(|| anyhow!("Invalid response data: {data}"))?;
+
+    Ok((text.to_string(), CompletionDetails::default()))
+}
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