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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,97 @@ | ||
| import {Chat, ChatOptions, ChatRequest, ChatResponse, ModelType} from "../base"; | ||
| import {AxiosInstance, AxiosRequestConfig, CreateAxiosDefaults} from "axios"; | ||
| import {CreateAxiosProxy} from "../../utils/proxyAgent"; | ||
| import es from "event-stream"; | ||
| import {ErrorData, Event, EventStream, MessageData, parseJSON} from "../../utils"; | ||
| import {randomUUID} from "crypto"; | ||
| import {v4} from "uuid"; | ||
| import moment from "moment"; | ||
|
|
||
| interface RealReq { | ||
| question: string; | ||
| chat_id: string; | ||
| timestamp: number; | ||
| } | ||
|
|
||
| export class ChatDemo extends Chat { | ||
| private client: AxiosInstance; | ||
|
|
||
| constructor(options?: ChatOptions) { | ||
| super(options); | ||
| this.client = CreateAxiosProxy({ | ||
| baseURL: 'https://chat.chatgptdemo.net', | ||
| headers: { | ||
| 'Content-Type': 'application/json', | ||
| "accept": "text/event-stream", | ||
| "Cache-Control": "no-cache", | ||
| "Proxy-Connection": "keep-alive" | ||
| } | ||
| } as CreateAxiosDefaults); | ||
| } | ||
|
|
||
| support(model: ModelType): number { | ||
| switch (model) { | ||
| case ModelType.GPT3p5Turbo: | ||
| return 2000; | ||
| default: | ||
| return 0; | ||
| } | ||
| } | ||
|
|
||
| public async ask(req: ChatRequest): Promise<ChatResponse> { | ||
| const stream = new EventStream(); | ||
| const res = await this.askStream(req, stream); | ||
| const result: ChatResponse = { | ||
| content: '', | ||
| } | ||
| return new Promise(resolve => { | ||
| stream.read((event, data) => { | ||
| switch (event) { | ||
| case Event.done: | ||
| break; | ||
| case Event.message: | ||
| result.content += (data as MessageData).content | ||
| break; | ||
| case Event.error: | ||
| result.error = (data as ErrorData).error | ||
| break; | ||
| } | ||
| }, () => { | ||
| resolve(result); | ||
| }) | ||
| }) | ||
|
|
||
| } | ||
|
|
||
| public async askStream(req: ChatRequest, stream: EventStream) { | ||
| const data: RealReq = { | ||
| question: req.prompt, | ||
| chat_id: v4(), | ||
| timestamp: moment().valueOf(), | ||
| }; | ||
| try { | ||
| const res = await this.client.post('/chat_api_stream', data, { | ||
| responseType: 'stream', | ||
| } as AxiosRequestConfig); | ||
| res.data.pipe(es.split(/\r?\n\r?\n/)).pipe(es.map(async (chunk: any, cb: any) => { | ||
| const dataStr = chunk.replace('data: ', ''); | ||
| if (!dataStr) { | ||
| stream.end(); | ||
| return; | ||
| } | ||
| const data = parseJSON(dataStr, {} as any); | ||
| if (!data?.choices) { | ||
| stream.write(Event.error, {error: 'not found data.choices'}) | ||
| stream.end(); | ||
| return; | ||
| } | ||
| const [{delta: {content = ""}}] = data.choices; | ||
| stream.write(Event.message, {content}); | ||
| })) | ||
| } catch (e: any) { | ||
| console.error(e); | ||
| stream.write(Event.error, {error: e.message}) | ||
| stream.end(); | ||
| } | ||
| } | ||
| } |
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