feature: 增加内容检测

server/src/main/java/com/pica/cloud/online/exam/analysis/server/controller/AntiSpamController.java

+package com.pica.cloud.online.exam.analysis.server.controller;
+
+import io.swagger.annotations.Api;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+/**
+ * @author wuminghao
+ * @date 2018/8/23 15:42
+ */
+@RestController
+@RequestMapping("/antispam")
+@Api(value = "垃圾检测", description = "检查文本、图像违禁词汇及广告")
+public class AntiSpamController {
+
+}

server/src/main/java/com/pica/cloud/online/exam/analysis/server/utils/HttpClient4Utils.java

+package com.pica.cloud.online.exam.analysis.server.utils;
+
+import org.apache.http.NameValuePair;
+import org.apache.http.client.HttpClient;
+import org.apache.http.client.config.RequestConfig;
+import org.apache.http.client.entity.UrlEncodedFormEntity;
+import org.apache.http.client.methods.CloseableHttpResponse;
+import org.apache.http.client.methods.HttpPost;
+import org.apache.http.impl.client.CloseableHttpClient;
+import org.apache.http.impl.client.HttpClients;
+import org.apache.http.impl.conn.PoolingHttpClientConnectionManager;
+import org.apache.http.message.BasicNameValuePair;
+import org.apache.http.util.EntityUtils;
+
+import java.io.IOException;
+import java.nio.charset.Charset;
+import java.util.ArrayList;
+import java.util.Iterator;
+import java.util.List;
+import java.util.Map;
+
+/**
+ * @author wuminghao
+ * @date 2018/8/23 15:44
+ */
+public class HttpClient4Utils {
+    /**
+     * 实例化HttpClient
+     * @param maxTotal
+     * @param maxPerRoute
+     * @param socketTimeout
+     * @param connectTimeout
+     * @param connectionRequestTimeout
+     * @return
+     */
+    public static HttpClient createHttpClient(int maxTotal, int maxPerRoute, int socketTimeout, int connectTimeout,
+                                              int connectionRequestTimeout) {
+        RequestConfig defaultRequestConfig = RequestConfig.custom().setSocketTimeout(socketTimeout)
+                .setConnectTimeout(connectTimeout).setConnectionRequestTimeout(connectionRequestTimeout).build();
+        PoolingHttpClientConnectionManager cm = new PoolingHttpClientConnectionManager();
+        cm.setMaxTotal(maxTotal);
+        cm.setDefaultMaxPerRoute(maxPerRoute);
+        CloseableHttpClient httpClient = HttpClients.custom().setConnectionManager(cm)
+                .setDefaultRequestConfig(defaultRequestConfig).build();
+        return httpClient;
+    }
+
+    /**
+     * 发送post请求
+     * @param httpClient
+     * @param url 请求地址
+     * @param params 请求参数
+     * @param encoding 编码
+     * @return
+     */
+    public static String sendPost(HttpClient httpClient, String url, Map<String, String> params, Charset encoding) {
+        String resp = "";
+        HttpPost httpPost = new HttpPost(url);
+        if (params != null && params.size() > 0) {
+            List<NameValuePair> formParams = new ArrayList<NameValuePair>();
+            Iterator<Map.Entry<String, String>> itr = params.entrySet().iterator();
+            while (itr.hasNext()) {
+                Map.Entry<String, String> entry = itr.next();
+                formParams.add(new BasicNameValuePair(entry.getKey(), entry.getValue()));
+            }
+            UrlEncodedFormEntity postEntity = new UrlEncodedFormEntity(formParams, encoding);
+            httpPost.setEntity(postEntity);
+        }
+        CloseableHttpResponse response = null;
+        try {
+            response = (CloseableHttpResponse) httpClient.execute(httpPost);
+            resp = EntityUtils.toString(response.getEntity(), encoding);
+        } catch (Exception e) {
+            // log
+            e.printStackTrace();
+        } finally {
+            if (response != null) {
+                try {
+                    response.close();
+                } catch (IOException e) {
+                    // log
+                    e.printStackTrace();
+                }
+            }
+        }
+        return resp;
+    }
+}

server/src/main/java/com/pica/cloud/online/exam/analysis/server/utils/SignatureUtils.java

+package com.pica.cloud.online.exam.analysis.server.utils;
+
+import org.apache.commons.codec.digest.DigestUtils;
+
+import java.io.UnsupportedEncodingException;
+import java.util.Arrays;
+import java.util.Map;
+
+/**
+ * @author wuminghao
+ * @date 2018/8/23 15:45
+ */
+public class SignatureUtils {
+    /**
+     * 生成签名信息
+     * @param secretKey 产品私钥
+     * @param params 接口请求参数名和参数值map，不包括signature参数名
+     * @return
+     * @throws UnsupportedEncodingException
+     */
+    public static String genSignature(String secretKey, Map<String, String> params) throws UnsupportedEncodingException {
+        // 1. 参数名按照ASCII码表升序排序
+        String[] keys = params.keySet().toArray(new String[0]);
+        Arrays.sort(keys);
+
+        // 2. 按照排序拼接参数名与参数值
+        StringBuffer paramBuffer = new StringBuffer();
+        for (String key : keys) {
+            paramBuffer.append(key).append(params.get(key) == null ? "" : params.get(key));
+        }
+        // 3. 将secretKey拼接到最后
+        paramBuffer.append(secretKey);
+
+        // 4. MD5是128位长度的摘要算法，用16进制表示，一个十六进制的字符能表示4个位，所以签名后的字符串长度固定为32个十六进制字符。
+        return DigestUtils.md5Hex(paramBuffer.toString().getBytes("UTF-8"));
+    }
+
+}