From 68882ecd4dced38e92b6ef581a30e45358fc61e0 Mon Sep 17 00:00:00 2001
From: sigoden <sigoden@gmail.com>
Date: Mon, 29 Apr 2024 08:43:23 +0800
Subject: refactor: abstract event stream handling (#458)

---
 src/client/ernie.rs | 56 ++++++++++-------------------------------------------
 1 file changed, 10 insertions(+), 46 deletions(-)

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

diff --git a/src/client/ernie.rs b/src/client/ernie.rs
index cbfdf22..4038e0d 100644
--- a/src/client/ernie.rs
+++ b/src/client/ernie.rs
@@ -1,16 +1,14 @@
 use super::{
-    maybe_catch_error, patch_system_message, Client, CompletionDetails, ErnieClient, ExtraConfig,
-    Model, ModelConfig, PromptType, SendData, SseHandler,
+    maybe_catch_error, patch_system_message, sse_stream, Client, CompletionDetails, ErnieClient,
+    ExtraConfig, Model, ModelConfig, PromptType, SendData, SseHandler,
 };
 
 use crate::utils::PromptKind;
 
-use anyhow::{anyhow, bail, Context, Result};
+use anyhow::{anyhow, Context, Result};
 use async_trait::async_trait;
 use chrono::Utc;
-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};
 use std::env;
@@ -108,49 +106,15 @@ async fn send_message(builder: RequestBuilder) -> Result<(String, CompletionDeta
 }
 
 async fn send_message_streaming(builder: RequestBuilder, handler: &mut SseHandler) -> 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)?;
-                if let Some(text) = data["result"].as_str() {
-                    handler.text(text)?;
-                }
-            }
-            Err(err) => {
-                match err {
-                    EventSourceError::InvalidContentType(header_value, res) => {
-                        let content_type = header_value
-                            .to_str()
-                            .map_err(|_| anyhow!("Invalid response header"))?;
-                        if content_type.contains("application/json") {
-                            let data: Value = res.json().await?;
-                            maybe_catch_error(&data)?;
-                            bail!("Invalid response data: {data}");
-                        } else {
-                            let text = res.text().await?;
-                            if let Some(text) = text.strip_prefix("data: ") {
-                                let data: Value = serde_json::from_str(text)?;
-                                if let Some(text) = data["result"].as_str() {
-                                    handler.text(text)?;
-                                }
-                            } else {
-                                bail!("Invalid response data: {text}")
-                            }
-                        }
-                    }
-                    EventSourceError::StreamEnded => {}
-                    _ => {
-                        bail!("{}", err);
-                    }
-                }
-                es.close();
-            }
+    let handle = |data: &str| -> Result<bool> {
+        let data: Value = serde_json::from_str(data)?;
+        if let Some(text) = data["result"].as_str() {
+            handler.text(text)?;
         }
-    }
+        Ok(false)
+    };
 
-    Ok(())
+    sse_stream(builder, handle).await
 }
 
 fn build_body(data: SendData, model: &Model) -> Value {
-- 
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