feat: 完善户外招聘会签到详情及小程序码
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package com.ruoyi.cms.service;
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import cn.hutool.http.HttpRequest;
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import cn.hutool.http.HttpResponse;
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import cn.hutool.http.HttpUtil;
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import com.alibaba.fastjson2.JSONObject;
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import com.ruoyi.common.exception.ServiceException;
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import org.springframework.http.HttpHeaders;
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import org.springframework.http.MediaType;
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import org.springframework.stereotype.Component;
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import java.nio.charset.StandardCharsets;
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import java.util.HashMap;
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import java.util.Map;
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/**
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* 微信小程序服务端接口客户端。
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*
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* <p>该客户端只负责单次远程调用，不记录 appSecret、access token 或微信响应中的敏感内容。</p>
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*/
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@Component
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public class WeChatMiniProgramApiClient
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{
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private static final String ACCESS_TOKEN_URL = "https://api.weixin.qq.com/cgi-bin/token";
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private static final String UNLIMITED_QR_CODE_URL =
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"https://api.weixin.qq.com/wxa/getwxacodeunlimit?access_token=";
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private static final int HTTP_TIMEOUT_MILLIS = 15000;
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public AccessTokenResult getAccessToken(String appId, String appSecret)
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{
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Map<String, Object> params = new HashMap<>();
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params.put("grant_type", "client_credential");
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params.put("appid", appId);
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params.put("secret", appSecret);
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String body = HttpUtil.get(ACCESS_TOKEN_URL, params, HTTP_TIMEOUT_MILLIS);
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JSONObject json = parseJson(body, "获取微信 access token 失败");
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String accessToken = json.getString("access_token");
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Integer expiresIn = json.getInteger("expires_in");
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if (accessToken == null || accessToken.trim().isEmpty()) {
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throw weChatError("获取微信 access token 失败", json);
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}
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return new AccessTokenResult(accessToken, expiresIn == null ? 7200 : expiresIn);
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}
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public QrCodeImage getUnlimitedQrCode(String accessToken, String scene, String page)
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{
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JSONObject requestBody = new JSONObject();
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requestBody.put("scene", scene);
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requestBody.put("page", page);
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// 新页面尚未随小程序版本发布时也允许先生成码；扫码仍会进入正式版小程序。
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requestBody.put("check_path", false);
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requestBody.put("env_version", "release");
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requestBody.put("width", 430);
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HttpResponse response = null;
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try {
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response = HttpRequest.post(UNLIMITED_QR_CODE_URL + accessToken)
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.timeout(HTTP_TIMEOUT_MILLIS)
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.header(HttpHeaders.CONTENT_TYPE, MediaType.APPLICATION_JSON_VALUE)
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.body(requestBody.toJSONString())
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.execute();
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byte[] body = response.bodyBytes();
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String contentType = response.header(HttpHeaders.CONTENT_TYPE);
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if (response.isOk() && body != null && body.length > 0
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&& isImageResponse(contentType, body)) {
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return new QrCodeImage(body, normalizeImageContentType(contentType, body));
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}
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String errorBody = body == null ? "" : new String(body, StandardCharsets.UTF_8);
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JSONObject errorJson = parseJson(errorBody, "生成微信小程序码失败");
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throw weChatError("生成微信小程序码失败", errorJson);
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} finally {
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if (response != null) {
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response.close();
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}
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}
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}
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private boolean isImageResponse(String contentType, byte[] body)
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{
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return (contentType != null && contentType.toLowerCase().startsWith("image/"))
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|| isPng(body) || isJpeg(body);
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}
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private String normalizeImageContentType(String contentType, byte[] body)
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{
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if (contentType != null && contentType.toLowerCase().startsWith("image/")) {
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int separator = contentType.indexOf(';');
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return separator > 0 ? contentType.substring(0, separator) : contentType;
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}
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return isJpeg(body) ? MediaType.IMAGE_JPEG_VALUE : MediaType.IMAGE_PNG_VALUE;
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}
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private boolean isPng(byte[] body)
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{
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return body.length >= 8
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&& (body[0] & 0xff) == 0x89
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&& body[1] == 0x50
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&& body[2] == 0x4e
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&& body[3] == 0x47;
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}
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private boolean isJpeg(byte[] body)
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{
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return body.length >= 3
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&& (body[0] & 0xff) == 0xff
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&& (body[1] & 0xff) == 0xd8
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&& (body[2] & 0xff) == 0xff;
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}
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private JSONObject parseJson(String body, String action)
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{
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try {
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JSONObject json = JSONObject.parseObject(body);
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if (json == null) {
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throw new IllegalArgumentException("empty json");
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}
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return json;
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} catch (Exception exception) {
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throw new ServiceException(action + "，微信接口返回了无法识别的响应");
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}
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}
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private ServiceException weChatError(String action, JSONObject json)
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{
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Integer errorCode = json.getInteger("errcode");
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String errorMessage = json.getString("errmsg");
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StringBuilder message = new StringBuilder(action);
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if (errorCode != null) {
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message.append("（错误码：").append(errorCode).append('）');
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}
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if (errorMessage != null && !errorMessage.trim().isEmpty()) {
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message.append("：").append(errorMessage);
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}
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return new ServiceException(message.toString());
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}
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public static class AccessTokenResult
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{
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private final String accessToken;
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private final int expiresIn;
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public AccessTokenResult(String accessToken, int expiresIn)
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{
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this.accessToken = accessToken;
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this.expiresIn = expiresIn;
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}
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public String getAccessToken()
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{
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return accessToken;
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}
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public int getExpiresIn()
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{
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return expiresIn;
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}
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}
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public static class QrCodeImage
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{
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private final byte[] content;
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private final String contentType;
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public QrCodeImage(byte[] content, String contentType)
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{
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this.content = content;
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this.contentType = contentType;
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}
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public byte[] getContent()
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{
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return content;
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}
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public String getContentType()
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{
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return contentType;
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}
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}
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}
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