feat: 流式输出内容 (#93)

* feat: 流式输出内容

* fix: 修复异常状态

* feat: markdown 链接颜色

service/package.json

@@ -15,6 +15,7 @@
   },
   "scripts": {
     "start": "esno ./src/index.ts",
+    "dev": "esno watch ./src/index.ts",
     "prod": "esno ./build/index.js",
     "build": "pnpm clean && tsup",
     "clean": "rimraf build",

service/src/chatgpt.ts

@@ -1,6 +1,6 @@
 import * as dotenv from 'dotenv'
 import 'isomorphic-fetch'
-import type { ChatGPTAPI, SendMessageOptions } from 'chatgpt'
+import type { ChatGPTAPI, ChatMessage, SendMessageOptions } from 'chatgpt'
 import { ChatGPTUnofficialProxyAPI } from 'chatgpt'
 import { sendResponse } from './utils'
 
@@ -8,7 +8,7 @@ dotenv.config()
 
 let apiModel: 'ChatGPTAPI' | 'ChatGPTUnofficialProxyAPI' | undefined
 
-export interface ChatContext {
+interface ChatContext {
   conversationId?: string
   parentMessageId?: string
 }
@@ -65,6 +65,34 @@ async function chatReply(
   }
 }
 
+async function chatReplyProcess(
+  message: string,
+  lastContext?: { conversationId?: string; parentMessageId?: string },
+  process?: (chat: ChatMessage) => void,
+) {
+  if (!message)
+    return sendResponse({ type: 'Fail', message: 'Message is empty' })
+
+  try {
+    let options: SendMessageOptions = { timeoutMs }
+
+    if (lastContext)
+      options = { ...lastContext }
+
+    const response = await api.sendMessage(message, {
+      ...options,
+      onProgress: (partialResponse) => {
+        process?.(partialResponse)
+      },
+    })
+
+    return sendResponse({ type: 'Success', data: response })
+  }
+  catch (error: any) {
+    return sendResponse({ type: 'Fail', message: error.message })
+  }
+}
+
 async function chatConfig() {
   return sendResponse({
     type: 'Success',
@@ -76,4 +104,6 @@ async function chatConfig() {
   })
 }
 
-export { chatReply, chatConfig }
+export type { ChatContext, ChatMessage }
+
+export { chatReply, chatReplyProcess, chatConfig }

service/src/index.ts

@@ -1,6 +1,6 @@
 import express from 'express'
-import type { ChatContext } from './chatgpt'
-import { chatConfig, chatReply } from './chatgpt'
+import type { ChatContext, ChatMessage } from './chatgpt'
+import { chatConfig, chatReply, chatReplyProcess } from './chatgpt'
 
 const app = express()
 const router = express.Router()
@@ -26,6 +26,23 @@ router.post('/chat', async (req, res) => {
   }
 })
 
+router.post('/chat-process', async (req, res) => {
+  res.setHeader('Content-type', 'application/octet-stream')
+
+  try {
+    const { prompt, options = {} } = req.body as { prompt: string; options?: ChatContext }
+    await chatReplyProcess(prompt, options, (chat: ChatMessage) => {
+      res.write(JSON.stringify(chat))
+    })
+  }
+  catch (error) {
+    res.write(JSON.stringify(error))
+  }
+  finally {
+    res.end()
+  }
+})
+
 router.post('/config', async (req, res) => {
   try {
     const response = await chatConfig()

src/api/index.ts

@@ -1,4 +1,4 @@
-import type { GenericAbortSignal } from 'axios'
+import type { AxiosProgressEvent, GenericAbortSignal } from 'axios'
 import { post } from '@/utils/request'
 
 export function fetchChatAPI<T = any>(
@@ -13,6 +13,21 @@ export function fetchChatAPI<T = any>(
   })
 }
 
+export function fetchChatAPIProcess<T = any>(
+  params: {
+    prompt: string
+    options?: { conversationId?: string; parentMessageId?: string }
+    signal?: GenericAbortSignal
+    onDownloadProgress?: (progressEvent: AxiosProgressEvent) => void },
+) {
+  return post<T>({
+    url: '/chat-process',
+    data: { prompt: params.prompt, options: params.options },
+    signal: params.signal,
+    onDownloadProgress: params.onDownloadProgress,
+  })
+}
+
 export function fetchChatConfig<T = any>() {
   return post<T>({
     url: '/config',

src/utils/request/index.ts

@@ -1,4 +1,4 @@
-import type { AxiosResponse, GenericAbortSignal } from 'axios'
+import type { AxiosProgressEvent, AxiosResponse, GenericAbortSignal } from 'axios'
 import request from './axios'
 
 export interface HttpOption {
@@ -6,6 +6,7 @@ export interface HttpOption {
   data?: any
   method?: string
   headers?: any
+  onDownloadProgress?: (progressEvent: AxiosProgressEvent) => void
   signal?: GenericAbortSignal
   beforeRequest?: () => void
   afterRequest?: () => void
@@ -17,9 +18,11 @@ export interface Response<T = any> {
   status: string
 }
 
-function http<T = any>({ url, data, method, headers, signal, beforeRequest, afterRequest }: HttpOption) {
+function http<T = any>(
+  { url, data, method, headers, onDownloadProgress, signal, beforeRequest, afterRequest }: HttpOption,
+) {
   const successHandler = (res: AxiosResponse<Response<T>>) => {
-    if (res.data.status === 'Success')
+    if (res.data.status === 'Success' || typeof res.data === 'string')
       return res.data
 
     return Promise.reject(res.data)
@@ -37,17 +40,18 @@ function http<T = any>({ url, data, method, headers, signal, beforeRequest, afte
   const params = Object.assign(typeof data === 'function' ? data() : data ?? {}, {})
 
   return method === 'GET'
-    ? request.get(url, { params, signal }).then(successHandler, failHandler)
-    : request.post(url, params, { headers, signal }).then(successHandler, failHandler)
+    ? request.get(url, { params, signal, onDownloadProgress }).then(successHandler, failHandler)
+    : request.post(url, params, { headers, signal, onDownloadProgress }).then(successHandler, failHandler)
 }
 
 export function get<T = any>(
-  { url, data, method = 'GET', signal, beforeRequest, afterRequest }: HttpOption,
+  { url, data, method = 'GET', onDownloadProgress, signal, beforeRequest, afterRequest }: HttpOption,
 ): Promise<Response<T>> {
   return http<T>({
     url,
     method,
     data,
+    onDownloadProgress,
     signal,
     beforeRequest,
     afterRequest,
@@ -55,13 +59,14 @@ export function get<T = any>(
 }
 
 export function post<T = any>(
-  { url, data, method = 'POST', headers, signal, beforeRequest, afterRequest }: HttpOption,
+  { url, data, method = 'POST', headers, onDownloadProgress, signal, beforeRequest, afterRequest }: HttpOption,
 ): Promise<Response<T>> {
   return http<T>({
     url,
     method,
     data,
     headers,
+    onDownloadProgress,
     signal,
     beforeRequest,
     afterRequest,

src/views/chat/components/Message/Text.vue

@@ -15,7 +15,7 @@ const props = defineProps<Props>()
 const wrapClass = computed(() => {
   return [
     'text-wrap',
-    'p-2',
+    'p-3',
     'min-w-[20px]',
     'rounded-md',
     props.inversion ? 'bg-[#d2f9d1]' : 'bg-[#f4f6f8]',
@@ -51,6 +51,9 @@ const text = computed(() => {
     max-width: 100%;
     vertical-align: middle;
   }
+  a {
+    color: #2d5cf6
+  }
 }
 
 .hljs {

src/views/chat/index.vue

@@ -8,7 +8,7 @@ import { useChat } from './hooks/useChat'
 import { HoverButton, SvgIcon } from '@/components/common'
 import { useBasicLayout } from '@/hooks/useBasicLayout'
 import { useChatStore } from '@/store'
-import { fetchChatAPI } from '@/api'
+import { fetchChatAPIProcess } from '@/api'
 
 let controller = new AbortController()
 
@@ -80,8 +80,19 @@ async function onConversation() {
   )
   scrollToBottom()
 
+  let offset = 0
   try {
-    const { data } = await fetchChatAPI<Chat.ConversationResponse>(message, options, controller.signal)
+    await fetchChatAPIProcess<Chat.ConversationResponse>({
+      prompt: message,
+      options,
+      signal: controller.signal,
+      onDownloadProgress: ({ event }) => {
+        const xhr = event.target
+        const { responseText } = xhr
+        const chunk = responseText.substring(offset)
+        offset = responseText.length
+        try {
+          const data = JSON.parse(chunk)
           updateChat(
             +uuid,
             dataSources.value.length - 1,
@@ -97,6 +108,12 @@ async function onConversation() {
           )
           scrollToBottom()
         }
+        catch (error) {
+          //
+        }
+      },
+    })
+  }
   catch (error: any) {
     let errorMessage = error?.message ?? 'Something went wrong, please try again later.'
 
@@ -119,6 +136,7 @@ async function onConversation() {
     scrollToBottom()
   }
   finally {
+    offset = 0
     loading.value = false
   }
 }
@@ -154,8 +172,19 @@ async function onRegenerate(index: number) {
     },
   )
 
+  let offset = 0
   try {
-    const { data } = await fetchChatAPI<Chat.ConversationResponse>(message, options, controller.signal)
+    await fetchChatAPIProcess<Chat.ConversationResponse>({
+      prompt: message,
+      options,
+      signal: controller.signal,
+      onDownloadProgress: ({ event }) => {
+        const xhr = event.target
+        const { responseText } = xhr
+        const chunk = responseText.substring(offset)
+        offset = responseText.length
+        try {
+          const data = JSON.parse(chunk)
           updateChat(
             +uuid,
             index,
@@ -170,8 +199,14 @@ async function onRegenerate(index: number) {
             },
           )
         }
+        catch (error) {
+          //
+        }
+      },
+    })
+  }
   catch (error: any) {
-    let errorMessage = 'Something went wrong, please try again later.'
+    let errorMessage = error?.message ?? 'Something went wrong, please try again later.'
 
     if (error.message === 'canceled')
       errorMessage = 'Request canceled. Please try again.'
@@ -192,6 +227,7 @@ async function onRegenerate(index: number) {
   }
   finally {
     loading.value = false
+    offset = 0
   }
 }