用 SwiftUI 实现 AI 聊天对话 app - iChatGPT

class Chatbot {        let apUrl = "https://chat.openai.com/"    let sessionTokenKey = "__Secure-next-auth.session-token"    let timeout = 30    var sessionToken: String    var authorization = ""    var conversationId = ""    var parentId = ""    let  id = ""        init(sessionToken: String) {        self.sessionToken = sessionToken    }        func headers() -> [String: String] {        return [            "Host": "chat.openai.com",            "Accept": "text/event-stream",            "Authorization": "Bearer \(self.authorization)",            "Content-Type": "application/json",            "User-Agent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/16.1 Safari/605.1.15",            "X-Openai-Assistant-App-Id": "",            "Connection": "close",            "Accept-Language": "en-US,en;q=0.9",            "Referer": "https://chat.openai.com/chat",        ]    }        func getPayload(prompt: String) -> [String: Any] {        var body = [            "action": "next",            "messages": [                [                    "id": "\(UUID().uuidString)",                    "role": "user",                    "content": ["content_type": "text", "parts": [prompt]],                ]            ],            "parent_message_id": "\(self.parentId)",            "model": "text-davinci-002-render",        ] as [String: Any]        if !self.conversationId.isEmpty {            body["conversation_id"] = self.conversationId        }        return body    }        func refreshSession() async {        let cookies = "\(sessionTokenKey)=\(self.sessionToken)"        let url = self.apUrl + "api/auth/session"        let userAgent = "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/16.1 Safari/605.1.15"        var request = URLRequest(url: URL(string: url)!)        request.httpMethod = "GET"        request.addValue(userAgent, forHTTPHeaderField: "User-Agent")        request.addValue(cookies, forHTTPHeaderField: "Cookie")        do {            let (data, response) = try await URLSession.shared.data(for: request)            let json = try JSONSerialization.jsonObject(with: data, options: [])            if let dictionary = json as? [String: Any] {                // Use the dictionary here                if let accessToken = dictionary["accessToken"] as? String {                    authorization = accessToken                }            }            guard let response = response as? HTTPURLResponse,                  let cookies = HTTPCookieStorage.shared.cookies(for: response.url!) else {                // handle error                print("刷新会话失败: <r>HTTP:\(response)")                return            }            for cookie in cookies {                if cookie.name == sessionTokenKey {                    self.sessionToken = cookie.value                    UserDefaults.standard.set(cookie.value, forKey: ChatGPTSessionTokenKey)                }            }        }        catch {            print("刷新会话失败: <r>HTTP:\(error)")        }    }        func getChatResponse(prompt: String) async -> String {        if  self.authorization.isEmpty {            await refreshSession()        }                let url = self.apUrl + "backend-api/conversation"        var request = URLRequest(url: URL(string: url)!)        request.httpMethod = "POST"        request.allHTTPHeaderFields = headers()        let dict = getPayload(prompt: prompt)        do {            let jsonData = try JSONSerialization.data(withJSONObject: dict, options: [])            request.httpBody = jsonData            let (data, response) = try await URLSession.shared.data(for: request)            guard let response = response as? HTTPURLResponse else {                let err = "非预期的响应内容:  <r>HTTP:\(response)"                print(err)                return err            }                        if response.statusCode == 429 {                return "请求过多，请放慢速度"            }                        guard let text = String(data: data, encoding: .utf8) else {                return "非预期的响应内容: 内容读取失败~"            }                        if response.statusCode != 200 {                let err = "非预期的响应内容:  <r>HTTP:\(response.statusCode)</r> \(text)"                print(err)                return err            }                        let lines = text.components(separatedBy: "\n")            // 倒数第四行，第6个字符后开始            let str = lines[lines.count - 5]            #if DEBUG            print(str)            #endif            let jsonString = str.suffix(from: str.index(str.startIndex, offsetBy: 6))            guard let jsondata = jsonString.data(using: .utf8) else {                return ""            }            let json = try JSONSerialization.jsonObject(with: jsondata, options: [])            guard let dictionary = json as? [String: Any],                    let conversation_id = dictionary["conversation_id"] as? String,                    let message = dictionary["message"] as? [String: Any],                    let parent_id = message["id"] as? String,                    let content = message["content"] as? [String: Any],                    let texts = content["parts"] as? [String],                    let parts = texts.last                    else {                return "解析错误~"            }            self.parentId = parent_id            self.conversationId = conversation_id            return parts        }        catch {            return "异常：\(error)"        }    }}

data: {"message": {"id": "xxxx", "role": "assistant", "user": null, "create_time": null, "update_time": null, "content": {"content_type": "text", "parts": ["我"]}, "end_turn": null, "weight": 1.0, "metadata": {}, "recipient": "all"}, "conversation_id": "xxxx", "error": null}
data: {"message": {"id": "xxxx", "role": "assistant", "user": null, "create_time": null, "update_time": null, "content": {"content_type": "text", "parts": ["我无"]}, "end_turn": null, "weight": 1.0, "metadata": {}, "recipient": "all"}, "conversation_id": "xxxx", "error": null}
data: {"message": {"id": "xxxx", "role": "assistant", "user": null, "create_time": null, "update_time": null, "content": {"content_type": "text", "parts": ["我无法"]}, "end_turn": null, "weight": 1.0, "metadata": {}, "recipient": "all"}, "conversation_id": "xxxx", "error": null}
中间省略xxxx行中间省略xxxx行中间省略xxxx行
data: {"message": {"id": "xxxx", "role": "assistant", "user": null, "create_time": null, "update_time": null, "content": {"content_type": "text", "parts": ["我无法确定全球当前的人口数量，因为我没有浏览网页的能力"]}, "end_turn": null, "weight": 1.0, "metadata": {}, "recipient": "all"}, "conversation_id": "xxxx", "error": null}
data: {"message": {"id": "xxxx", "role": "assistant", "user": null, "create_time": null, "update_time": null, "content": {"content_type": "text", "parts": ["我无法确定全球当前的人口数量，因为我没有浏览网页的能力。"]}, "end_turn": null, "weight": 1.0, "metadata": {}, "recipient": "all"}, "conversation_id": "xxxx", "error": null}

let lines = text.components(separatedBy: "\n")// 倒数第四行，第6个字符后开始let str = lines[lines.count - 5]

咦，知道 iChatGPT 
它酷炫极了，支持语言模型交互
它开源了，人人可用
快来下载，体验它的强大
它可以帮助你，完成复杂任务
不论是写文章，还是做研究
它是程序员的好帮手
让工作更高效，更愉快
啦啦啦，iChatGPT 
开源了，万岁！