155 lines
4.5 KiB
JavaScript
155 lines
4.5 KiB
JavaScript
import { BASE_URL } from "../../constant/base";
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/// 请求流式数据的API
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const API = '/agent/assistant/chat';
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/**
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* 获取AI聊天流式信息（仅微信小程序支持）
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* @param {Object} params 请求参数
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* @param {Function} onChunk 回调，每收到一段数据触发
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* @returns {Object} 包含Promise和requestTask的对象
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*/
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function agentChatStream(params, onChunk) {
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let requestTask;
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const promise = new Promise((resolve, reject) => {
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const token = uni.getStorageSync('token');
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let hasError = false;
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console.log("发送请求内容: ", params)
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// #ifdef MP-WEIXIN
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requestTask = uni.request({
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url: BASE_URL + API, // 替换为你的接口地址
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method: 'POST',
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data: params,
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enableChunked: true,
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header: {
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Accept: 'text/event-stream',
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'Content-Type': 'application/json',
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Authorization: `Bearer ${token}`, // 如需token可加
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},
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responseType: 'arraybuffer',
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success(res) {
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resolve(res.data);
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},
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fail(err) {
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console.log("====> ", JSON.stringify(err))
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reject(err);
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},
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complete(res) {
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if(res.statusCode !== 200) {
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console.log("====> ", JSON.stringify(res))
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if (onChunk) {
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onChunk({ error: true, message: '服务器错误', detail: res });
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}
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reject(res);
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}
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}
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});
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requestTask.onHeadersReceived(res => {
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console.log('onHeadersReceived', res);
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const status = res.statusCode || (res.header && res.header.statusCode);
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if (status && status !== 200) {
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hasError = true;
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if (onChunk) {
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onChunk({ error: true, message: `服务器错误(${status})`, detail: res });
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}
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requestTask.abort && requestTask.abort();
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}
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});
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requestTask.onChunkReceived(res => {
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// 检查请求是否已被中止
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if (hasError || requestTask.isAborted) return;
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const base64 = uni.arrayBufferToBase64(res.data);
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let data = '';
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try {
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data = decodeURIComponent(escape(weAtob(base64)));
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} catch (e) {
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// 某些平台可能不支持 atob，可以直接用 base64
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data = base64;
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}
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const messages = parseSSEChunk(data);
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messages.forEach(msg => {
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if (onChunk) onChunk(msg);
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});
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});
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// #endif
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});
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return {
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promise,
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requestTask
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};
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}
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// window.atob兼容性处理
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const weAtob = (string) => {
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const b64re = /^(?:[A-Za-z\d+/]{4})*?(?:[A-Za-z\d+/]{2}(?:==)?|[A-Za-z\d+/]{3}=?)?$/;
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const b64 = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=';
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// 去除空白字符
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string = String(string).replace(/[\t\n\f\r ]+/g, '');
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// 验证 Base64 编码
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if (!b64re.test(string)) {
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throw new TypeError(
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// eslint-disable-next-line quotes
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"Failed to execute 'atob' on 'Window': The string to be decoded is not correctly encoded."
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);
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}
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// 填充字符
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string += '=='.slice(2 - (string.length & 3));
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let bitmap,
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result = '',
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r1,
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r2,
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i = 0;
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for (; i < string.length;) {
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bitmap =
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(b64.indexOf(string.charAt(i++)) << 18) |
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(b64.indexOf(string.charAt(i++)) << 12) |
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((r1 = b64.indexOf(string.charAt(i++))) << 6) |
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(r2 = b64.indexOf(string.charAt(i++)));
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if (r1 === 64) {
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result += String.fromCharCode((bitmap >> 16) & 255);
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} else if (r2 === 64) {
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result += String.fromCharCode(
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(bitmap >> 16) & 255,
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(bitmap >> 8) & 255
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);
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} else {
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result += String.fromCharCode(
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(bitmap >> 16) & 255,
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(bitmap >> 8) & 255,
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bitmap & 255
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);
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}
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}
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return result;
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};
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// 解析SSE分段数据
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function parseSSEChunk(raw) {
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// 拆分为多段
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const lines = raw.split('\n\n');
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const results = [];
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lines.forEach(line => {
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// 只处理包含 data: 的行
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const dataMatch = line.match(/data:(\{.*\})/);
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if (dataMatch && dataMatch[1]) {
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try {
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const obj = JSON.parse(dataMatch[1]);
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results.push(obj);
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} catch (e) {
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// 解析失败忽略
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}
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}
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});
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return results;
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}
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export { agentChatStream } |