我的文件列表

• 业务逻辑是，点击我的文件，会在展示界面展示出该用户所有文件
• 单机图标会显示选项下载，分享，删除，属性
• 单机空白处会显示选型，会显示选项：按下载量排序/按下载量排序/刷新/上传
• 其中上传操作也可以点击界面中的上传图标，然后会弹出窗口选择要上传的文件，上传过程是一个toolbar会显示进度在传输列表中

• 实质是两张表联查 file_info, user_file_list ，做了物理分页，根据指令按照pv字段做升序降序排列

Mian

• 读取配置文件 read_cfg();拿到数据库连接

• while (FCGI_Accept() >= 0)等待连接

• 业务主要分两种，一是只想知道用户有多少个文件，另一个是普通排序，按照pv升降序排序；均为post请求；为post请求时，由环境变量cmd拿到请求指令，由buf缓冲区拿到数据

• cmd为count，获取用户文件个数if (strcmp(cmd, “count”) == 0) ，查表 get_user_files_count(user, ret); //获取用户文件个数

• cmd为normal；pvacs；pvdesc；获取用户文件列表 get_user_filelist(cmd, user, start, count);

• 需要注意的是，在fcgi程序中，直接fread是从标准输入读，就是从web服务器读；直接printf就是往标准输出，也是往web服务器（cgi程序利用I.O重定向技术）

    	int main(){//count 获取用户文件个数//display 获取用户文件信息，展示到前端char cmd[20];char user[USER_NAME_LEN];char token[TOKEN_LEN];//读取数据库配置信息read_cfg();//阻塞等待用户连接while (FCGI_Accept() >= 0){// 获取URL地址 "?" 后面的内容char *query = getenv("QUERY_STRING");//解析命令query_parse_key_value(query, "cmd", cmd, NULL);LOG(MYFILES_LOG_MODULE, MYFILES_LOG_PROC, "cmd = %s\n", cmd);char *contentLength = getenv("CONTENT_LENGTH");int len;printf("Content-type: text/html\r\n\r\n");if( contentLength == NULL ){len = 0;}else{len = atoi(contentLength); //字符串转整型}if (len <= 0){printf("No data from standard input.<p>\n");LOG(MYFILES_LOG_MODULE, MYFILES_LOG_PROC, "len = 0, No data from standard input\n");}else{char buf[4*1024] = {0};int ret = 0;ret = fread(buf, 1, len, stdin); //从标准输入(web服务器)读取内容if(ret == 0){LOG(MYFILES_LOG_MODULE, MYFILES_LOG_PROC, "fread(buf, 1, len, stdin) err\n");continue;}LOG(MYFILES_LOG_MODULE, MYFILES_LOG_PROC, "buf = %s\n", buf);if (strcmp(cmd, "count") == 0) //count 获取用户文件个数{get_count_json_info(buf, user, token); //通过json包获取用户名, token//验证登陆token，成功返回0，失败-1ret = verify_token(user, token); //util_cgi.hget_user_files_count(user, ret); //获取用户文件个数}//获取用户文件信息 127.0.0.1:80/myfiles&cmd=normal//按下载量升序 127.0.0.1:80/myfiles?cmd=pvasc//按下载量降序127.0.0.1:80/myfiles?cmd=pvdescelse{int start; //文件起点int count; //文件个数get_fileslist_json_info(buf, user, token, &start, &count); //通过json包获取信息LOG(MYFILES_LOG_MODULE, MYFILES_LOG_PROC, "user = %s, token = %s, start = %d, count = %d\n", user, token, start, count);//验证登陆token，成功返回0，失败-1ret = verify_token(user, token); //util_cgi.hif(ret == 0){get_user_filelist(cmd, user, start, count); //获取用户文件列表}else{char *out = return_status("111"); //token验证失败错误码if(out != NULL){printf(out); //给前端反馈错误码free(out);}}}}}return 0;}
  

读取配置信息

• 读取到MySQL配置文件信息

    void read_cfg(){//读取mysql数据库配置信息get_cfg_value(CFG_PATH, "mysql", "user", mysql_user);get_cfg_value(CFG_PATH, "mysql", "password", mysql_pwd);get_cfg_value(CFG_PATH, "mysql", "database", mysql_db);LOG(MYFILES_LOG_MODULE, MYFILES_LOG_PROC, "mysql:[user=%s,pwd=%s,database=%s]", mysql_user, mysql_pwd, mysql_db);//读取redis配置信息//get_cfg_value(CFG_PATH, "redis", "ip", redis_ip);//get_cfg_value(CFG_PATH, "redis", "port", redis_port);//LOG(MYFILES_LOG_MODULE, MYFILES_LOG_PROC, "redis:[ip=%s,port=%s]\n", redis_ip, redis_port);}
  

解析json登录token（cmd为count）

• cmd为count时，此时的json包格式为

    {"token": "9e894efc0b2a898a82765d0a7f2c94cb",user:xxxx}
  

• 此时，解析jason拿到token和username

    //解析的json包, 登陆tokenint get_count_json_info(char *buf, char *user, char *token){int ret = 0;/*json数据如下{"token": "9e894efc0b2a898a82765d0a7f2c94cb",user:xxxx}*///解析json包//解析一个json字符串为cJSON对象cJSON * root = cJSON_Parse(buf);if(NULL == root){LOG(MYFILES_LOG_MODULE, MYFILES_LOG_PROC, "cJSON_Parse err\n");ret = -1;goto END;}//返回指定字符串对应的json对象//用户cJSON *child1 = cJSON_GetObjectItem(root, "user");if(NULL == child1){LOG(MYFILES_LOG_MODULE, MYFILES_LOG_PROC, "cJSON_GetObjectItem err\n");ret = -1;goto END;}//LOG(MYFILES_LOG_MODULE, MYFILES_LOG_PROC, "child1->valuestring = %s\n", child1->valuestring);strcpy(user, child1->valuestring); //拷贝内容//登陆tokencJSON *child2 = cJSON_GetObjectItem(root, "token");if(NULL == child2){LOG(MYFILES_LOG_MODULE, MYFILES_LOG_PROC, "cJSON_GetObjectItem err\n");ret = -1;goto END;}//LOG(MYFILES_LOG_MODULE, MYFILES_LOG_PROC, "child2->valuestring = %s\n", child2->valuestring);strcpy(token, child2->valuestring); //拷贝内容END:if(root != NULL){cJSON_Delete(root);//删除json对象root = NULL;}return ret;}
  

解析jason（cmd不为count）

• 作用是为了拿到user，token，start，count，用来给普通/升/降序同时物理分页查询准备

    	//解析的json包int get_fileslist_json_info(char *buf, char *user, char *token, int *p_start, int *p_count){int ret = 0;/*json数据如下{"user": "yoyo""token": xxxx"start": 0"count": 10}*///解析json包//解析一个json字符串为cJSON对象cJSON * root = cJSON_Parse(buf);if(NULL == root){LOG(MYFILES_LOG_MODULE, MYFILES_LOG_PROC, "cJSON_Parse err\n");ret = -1;goto END;}//返回指定字符串对应的json对象//用户cJSON *child1 = cJSON_GetObjectItem(root, "user");if(NULL == child1){LOG(MYFILES_LOG_MODULE, MYFILES_LOG_PROC, "cJSON_GetObjectItem err\n");ret = -1;goto END;}//LOG(MYFILES_LOG_MODULE, MYFILES_LOG_PROC, "child1->valuestring = %s\n", child1->valuestring);strcpy(user, child1->valuestring); //拷贝内容//tokencJSON *child2 = cJSON_GetObjectItem(root, "token");if(NULL == child2){LOG(MYFILES_LOG_MODULE, MYFILES_LOG_PROC, "cJSON_GetObjectItem err\n");ret = -1;goto END;}strcpy(token, child2->valuestring); //拷贝内容//文件起点cJSON *child3 = cJSON_GetObjectItem(root, "start");if(NULL == child3){LOG(MYFILES_LOG_MODULE, MYFILES_LOG_PROC, "cJSON_GetObjectItem err\n");ret = -1;goto END;}*p_start = child3->valueint;//文件请求个数cJSON *child4 = cJSON_GetObjectItem(root, "count");if(NULL == child4){LOG(MYFILES_LOG_MODULE, MYFILES_LOG_PROC, "cJSON_GetObjectItem err\n");ret = -1;goto END;}*p_count = child4->valueint;END:if(root != NULL){cJSON_Delete(root);//删除json对象root = NULL;}return ret;}
  

获取用户文件个数

• 数据库查询操作 sprintf(sql_cmd, “select count from user_file_count where user=”%s"", user);

• 将结果封装进tmp int ret2 = process_result_one(conn, sql_cmd, tmp);

  		//获取用户文件个数void get_user_files_count(char *user, int ret){char sql_cmd[SQL_MAX_LEN] = {0};MYSQL *conn = NULL;long line = 0;//connect the databaseconn = msql_conn(mysql_user, mysql_pwd, mysql_db);if (conn == NULL){LOG(MYFILES_LOG_MODULE, MYFILES_LOG_PROC, "msql_conn err\n");goto END;}//设置数据库编码，主要处理中文编码问题mysql_query(conn, "set names utf8");sprintf(sql_cmd, "select count from user_file_count where user=\"%s\"", user);char tmp[512] = {0};//返回值： 0成功并保存记录集，1没有记录集，2有记录集但是没有保存，-1失败int ret2 = process_result_one(conn, sql_cmd, tmp); //指向sql语句if(ret2 != 0){LOG(MYFILES_LOG_MODULE, MYFILES_LOG_PROC, "%s 操作失败\n", sql_cmd);goto END;}line = atol(tmp); //字符串转长整形END:if(conn != NULL){mysql_close(conn);}LOG(MYFILES_LOG_MODULE, MYFILES_LOG_PROC, "line = %ld\n", line);//给前端反馈的信息return_login_status(line, ret);}
  

  获取用户文件列表

• get_user_filelist(char *cmd, char *user, int start, int count)需要参数cmd，user，start，count（这两个参数在前端设置好）

    - cmd为normal 普通查询只做了物理分页，==limit %d, %d", user, start, count==if(strcmp(cmd, "normal") == 0) //获取用户文件信息{//sql语句sprintf(sql_cmd, "select user_file_list.*, file_info.url, file_info.size, file_info.type from file_info, user_file_list where user = '%s' and file_info.md5 = user_file_list.md5 limit %d, %d", user, start, count);}	- cmd为pvasc升序查询按照pv排序同时做了物理分页，==order by pv asc limit %d, %d", user, start, count)==else if(strcmp(cmd, "pvasc") == 0) //按下载量升序{//sql语句sprintf(sql_cmd, "select user_file_list.*, file_info.url, file_info.size, file_info.type from file_info, user_file_list where user = '%s' and file_info.md5 = user_file_list.md5  order by pv asc limit %d, %d", user, start, count);}-  cmd为pvdesc降序查询按照pv排序同时做了物理分页，==order by pv desc limit %d, %d", user, start, count==else if(strcmp(cmd, "pvdesc") == 0) //按下载量降序{//sql语句sprintf(sql_cmd, "select user_file_list.*, file_info.url, file_info.size, file_info.type from file_info, user_file_list where user = '%s' and file_info.md5 = user_file_list.md5 order by pv desc limit %d, %d", user, start, count);}
  

• 进行查询 if (mysql_query(conn, sql_cmd) != 0)

• 生成结果集 res_set = mysql_store_result(conn);/生成结果集/

• 对结果集进行处理

  • 数据库的查询结果是一行行的，游标依次往下拿到每一个字段的值，封装进jason对象 cJSON_AddItemToArray(array, item);
  • 再封装进数组cJSON_AddItemToObject(root, “files”, array)代表所有文件的列表，
  • 再将该数组封装进root根对象转为字符串发送前端

    int get_user_filelist(char *cmd, char *user, int start, int count){int ret = 0;char sql_cmd[SQL_MAX_LEN] = {0};MYSQL *conn = NULL;cJSON *root = NULL;cJSON *array =NULL;char *out = NULL;char *out2 = NULL;MYSQL_RES *res_set = NULL;//connect the databaseconn = msql_conn(mysql_user, mysql_pwd, mysql_db);if (conn == NULL){LOG(MYFILES_LOG_MODULE, MYFILES_LOG_PROC, "msql_conn err\n");ret = -1;goto END;}//设置数据库编码，主要处理中文编码问题mysql_query(conn, "set names utf8");//多表指定行范围查询if(strcmp(cmd, "normal") == 0) //获取用户文件信息{//sql语句sprintf(sql_cmd, "select user_file_list.*, file_info.url, file_info.size, file_info.type from file_info, user_file_list where user = '%s' and file_info.md5 = user_file_list.md5 limit %d, %d", user, start, count);}else if(strcmp(cmd, "pvasc") == 0) //按下载量升序{//sql语句sprintf(sql_cmd, "select user_file_list.*, file_info.url, file_info.size, file_info.type from file_info, user_file_list where user = '%s' and file_info.md5 = user_file_list.md5  order by pv asc limit %d, %d", user, start, count);}else if(strcmp(cmd, "pvdesc") == 0) //按下载量降序{//sql语句sprintf(sql_cmd, "select user_file_list.*, file_info.url, file_info.size, file_info.type from file_info, user_file_list where user = '%s' and file_info.md5 = user_file_list.md5 order by pv desc limit %d, %d", user, start, count);}LOG(MYFILES_LOG_MODULE, MYFILES_LOG_PROC, "%s 在操作\n", sql_cmd);if (mysql_query(conn, sql_cmd) != 0){LOG(MYFILES_LOG_MODULE, MYFILES_LOG_PROC, "%s 操作失败：%s\n", sql_cmd, mysql_error(conn));ret = -1;goto END;}res_set = mysql_store_result(conn);/*生成结果集*/if (res_set == NULL){LOG(MYFILES_LOG_MODULE, MYFILES_LOG_PROC, "smysql_store_result error: %s!\n", mysql_error(conn));ret = -1;goto END;}ulong line = 0;//mysql_num_rows接受由mysql_store_result返回的结果结构集，并返回结构集中的行数line = mysql_num_rows(res_set);if (line == 0)//没有结果{LOG(MYFILES_LOG_MODULE, MYFILES_LOG_PROC, "mysql_num_rows(res_set) failed：%s\n", mysql_error(conn));ret = -1;goto END;}MYSQL_ROW row;root = cJSON_CreateObject();array = cJSON_CreateArray();// mysql_fetch_row从使用mysql_store_result得到的结果结构中提取一行，并把它放到一个行结构中。// 当数据用完或发生错误时返回NULL.while ((row = mysql_fetch_row(res_set)) != NULL){//array[i]:cJSON* item = cJSON_CreateObject();//mysql_num_fields获取结果中列的个数/*for(i = 0; i < mysql_num_fields(res_set); i++){if(row[i] != NULL){}}*//*{"user": "yoyo","md5": "e8ea6031b779ac26c319ddf949ad9d8d","time": "2017-02-26 21:35:25","filename": "test.mp4","share_status": 0,"pv": 0,"url": "http://192.168.31.109:80/group1/M00/00/00/wKgfbViy2Z2AJ-FTAaM3As-g3Z0782.mp4","size": 27473666,"type": "mp4"}*///-- user	文件所属用户if(row[0] != NULL){cJSON_AddStringToObject(item, "user", row[0]);}//-- md5 文件md5if(row[1] != NULL){cJSON_AddStringToObject(item, "md5", row[1]);}//-- createtime 文件创建时间if(row[2] != NULL){cJSON_AddStringToObject(item, "time", row[2]);}//-- filename 文件名字if(row[3] != NULL){cJSON_AddStringToObject(item, "filename", row[3]);}//-- shared_status 共享状态, 0为没有共享， 1为共享if(row[4] != NULL){cJSON_AddNumberToObject(item, "share_status", atoi( row[4] ));}//-- pv 文件下载量，默认值为0，下载一次加1if(row[5] != NULL){cJSON_AddNumberToObject(item, "pv", atol( row[5] ));}//-- url 文件urlif(row[6] != NULL){cJSON_AddStringToObject(item, "url", row[6]);}//-- size 文件大小, 以字节为单位if(row[7] != NULL){cJSON_AddNumberToObject(item, "size", atol( row[7] ));}//-- type 文件类型： png, zip, mp4……if(row[8] != NULL){cJSON_AddStringToObject(item, "type", row[8]);}cJSON_AddItemToArray(array, item);}cJSON_AddItemToObject(root, "files", array);out = cJSON_Print(root);LOG(MYFILES_LOG_MODULE, MYFILES_LOG_PROC, "%s\n", out);END:if(ret == 0){printf("%s", out); //给前端反馈信息}else{   //失败/*获取用户文件列表：成功：文件列表json失败：{"code": "015"}*/out2 = NULL;out2 = return_status("015");}if(out2 != NULL){printf(out2); //给前端反馈错误码free(out2);}if(res_set != NULL){//完成所有对数据的操作后，调用mysql_free_result来善后处理mysql_free_result(res_set);}if(conn != NULL){mysql_close(conn);}if(root != NULL){cJSON_Delete(root);}if(out != NULL){free(out);}return ret;}
  

源码

	/*** @file myfiles_cgi.c* @brief  用户列表展示CGI程序* @author Mike* @version 2.0* @date 2017年2月27日*/#include "fcgi_config.h"#include "fcgi_stdio.h"#include <stdio.h>#include <stdlib.h>#include <string.h>#include "make_log.h" //日志头文件#include "util_cgi.h"#include "deal_mysql.h"#include "cfg.h"#include "cJSON.h"#include <sys/time.h>#define MYFILES_LOG_MODULE       "cgi"#define MYFILES_LOG_PROC         "myfiles"//mysql 数据库配置信息 用户名， 密码， 数据库名称static char mysql_user[128] = {0};static char mysql_pwd[128] = {0};static char mysql_db[128] = {0};//redis 服务器ip、端口//static char redis_ip[30] = {0};//static char redis_port[10] = {0};//读取配置信息void read_cfg(){//读取mysql数据库配置信息get_cfg_value(CFG_PATH, "mysql", "user", mysql_user);get_cfg_value(CFG_PATH, "mysql", "password", mysql_pwd);get_cfg_value(CFG_PATH, "mysql", "database", mysql_db);LOG(MYFILES_LOG_MODULE, MYFILES_LOG_PROC, "mysql:[user=%s,pwd=%s,database=%s]", mysql_user, mysql_pwd, mysql_db);//读取redis配置信息//get_cfg_value(CFG_PATH, "redis", "ip", redis_ip);//get_cfg_value(CFG_PATH, "redis", "port", redis_port);//LOG(MYFILES_LOG_MODULE, MYFILES_LOG_PROC, "redis:[ip=%s,port=%s]\n", redis_ip, redis_port);}//解析的json包, 登陆tokenint get_count_json_info(char *buf, char *user, char *token){int ret = 0;/*json数据如下{"token": "9e894efc0b2a898a82765d0a7f2c94cb",user:xxxx}*///解析json包//解析一个json字符串为cJSON对象cJSON * root = cJSON_Parse(buf);if(NULL == root){LOG(MYFILES_LOG_MODULE, MYFILES_LOG_PROC, "cJSON_Parse err\n");ret = -1;goto END;}//返回指定字符串对应的json对象//用户cJSON *child1 = cJSON_GetObjectItem(root, "user");if(NULL == child1){LOG(MYFILES_LOG_MODULE, MYFILES_LOG_PROC, "cJSON_GetObjectItem err\n");ret = -1;goto END;}//LOG(MYFILES_LOG_MODULE, MYFILES_LOG_PROC, "child1->valuestring = %s\n", child1->valuestring);strcpy(user, child1->valuestring); //拷贝内容//登陆tokencJSON *child2 = cJSON_GetObjectItem(root, "token");if(NULL == child2){LOG(MYFILES_LOG_MODULE, MYFILES_LOG_PROC, "cJSON_GetObjectItem err\n");ret = -1;goto END;}//LOG(MYFILES_LOG_MODULE, MYFILES_LOG_PROC, "child2->valuestring = %s\n", child2->valuestring);strcpy(token, child2->valuestring); //拷贝内容END:if(root != NULL){cJSON_Delete(root);//删除json对象root = NULL;}return ret;}//返回前端情况void return_login_status(long num, int token_flag){char *out = NULL;char *token;char num_buf[128] = {0};if(token_flag == 0){token = "110"; //成功}else{token = "111"; //失败}//数字sprintf(num_buf, "%ld", num);cJSON *root = cJSON_CreateObject();  //创建json项目cJSON_AddStringToObject(root, "num", num_buf);// {"num":"1111"}cJSON_AddStringToObject(root, "code", token);// {"code":"110"}out = cJSON_Print(root);//cJSON to string(char *)cJSON_Delete(root);if(out != NULL){printf(out); //给前端反馈信息free(out); //记得释放}}//获取用户文件个数void get_user_files_count(char *user, int ret){char sql_cmd[SQL_MAX_LEN] = {0};MYSQL *conn = NULL;long line = 0;//connect the databaseconn = msql_conn(mysql_user, mysql_pwd, mysql_db);if (conn == NULL){LOG(MYFILES_LOG_MODULE, MYFILES_LOG_PROC, "msql_conn err\n");goto END;}//设置数据库编码，主要处理中文编码问题mysql_query(conn, "set names utf8");sprintf(sql_cmd, "select count from user_file_count where user=\"%s\"", user);char tmp[512] = {0};//返回值： 0成功并保存记录集，1没有记录集，2有记录集但是没有保存，-1失败int ret2 = process_result_one(conn, sql_cmd, tmp); //指向sql语句if(ret2 != 0){LOG(MYFILES_LOG_MODULE, MYFILES_LOG_PROC, "%s 操作失败\n", sql_cmd);goto END;}line = atol(tmp); //字符串转长整形END:if(conn != NULL){mysql_close(conn);}LOG(MYFILES_LOG_MODULE, MYFILES_LOG_PROC, "line = %ld\n", line);//给前端反馈的信息return_login_status(line, ret);}//解析的json包int get_fileslist_json_info(char *buf, char *user, char *token, int *p_start, int *p_count){int ret = 0;/*json数据如下{"user": "yoyo""token": xxxx"start": 0"count": 10}*///解析json包//解析一个json字符串为cJSON对象cJSON * root = cJSON_Parse(buf);if(NULL == root){LOG(MYFILES_LOG_MODULE, MYFILES_LOG_PROC, "cJSON_Parse err\n");ret = -1;goto END;}//返回指定字符串对应的json对象//用户cJSON *child1 = cJSON_GetObjectItem(root, "user");if(NULL == child1){LOG(MYFILES_LOG_MODULE, MYFILES_LOG_PROC, "cJSON_GetObjectItem err\n");ret = -1;goto END;}//LOG(MYFILES_LOG_MODULE, MYFILES_LOG_PROC, "child1->valuestring = %s\n", child1->valuestring);strcpy(user, child1->valuestring); //拷贝内容//tokencJSON *child2 = cJSON_GetObjectItem(root, "token");if(NULL == child2){LOG(MYFILES_LOG_MODULE, MYFILES_LOG_PROC, "cJSON_GetObjectItem err\n");ret = -1;goto END;}strcpy(token, child2->valuestring); //拷贝内容//文件起点cJSON *child3 = cJSON_GetObjectItem(root, "start");if(NULL == child3){LOG(MYFILES_LOG_MODULE, MYFILES_LOG_PROC, "cJSON_GetObjectItem err\n");ret = -1;goto END;}*p_start = child3->valueint;//文件请求个数cJSON *child4 = cJSON_GetObjectItem(root, "count");if(NULL == child4){LOG(MYFILES_LOG_MODULE, MYFILES_LOG_PROC, "cJSON_GetObjectItem err\n");ret = -1;goto END;}*p_count = child4->valueint;END:if(root != NULL){cJSON_Delete(root);//删除json对象root = NULL;}return ret;}//获取用户文件列表//获取用户文件信息 127.0.0.1:80/myfiles&cmd=normal//按下载量升序 127.0.0.1:80/myfiles?cmd=pvasc//按下载量降序127.0.0.1:80/myfiles?cmd=pvdescint get_user_filelist(char *cmd, char *user, int start, int count){int ret = 0;char sql_cmd[SQL_MAX_LEN] = {0};MYSQL *conn = NULL;cJSON *root = NULL;cJSON *array =NULL;char *out = NULL;char *out2 = NULL;MYSQL_RES *res_set = NULL;//connect the databaseconn = msql_conn(mysql_user, mysql_pwd, mysql_db);if (conn == NULL){LOG(MYFILES_LOG_MODULE, MYFILES_LOG_PROC, "msql_conn err\n");ret = -1;goto END;}//设置数据库编码，主要处理中文编码问题mysql_query(conn, "set names utf8");//多表指定行范围查询if(strcmp(cmd, "normal") == 0) //获取用户文件信息{//sql语句sprintf(sql_cmd, "select user_file_list.*, file_info.url, file_info.size, file_info.type from file_info, user_file_list where user = '%s' and file_info.md5 = user_file_list.md5 limit %d, %d", user, start, count);}else if(strcmp(cmd, "pvasc") == 0) //按下载量升序{//sql语句sprintf(sql_cmd, "select user_file_list.*, file_info.url, file_info.size, file_info.type from file_info, user_file_list where user = '%s' and file_info.md5 = user_file_list.md5  order by pv asc limit %d, %d", user, start, count);}else if(strcmp(cmd, "pvdesc") == 0) //按下载量降序{//sql语句sprintf(sql_cmd, "select user_file_list.*, file_info.url, file_info.size, file_info.type from file_info, user_file_list where user = '%s' and file_info.md5 = user_file_list.md5 order by pv desc limit %d, %d", user, start, count);}LOG(MYFILES_LOG_MODULE, MYFILES_LOG_PROC, "%s 在操作\n", sql_cmd);if (mysql_query(conn, sql_cmd) != 0){LOG(MYFILES_LOG_MODULE, MYFILES_LOG_PROC, "%s 操作失败：%s\n", sql_cmd, mysql_error(conn));ret = -1;goto END;}res_set = mysql_store_result(conn);/*生成结果集*/if (res_set == NULL){LOG(MYFILES_LOG_MODULE, MYFILES_LOG_PROC, "smysql_store_result error: %s!\n", mysql_error(conn));ret = -1;goto END;}ulong line = 0;//mysql_num_rows接受由mysql_store_result返回的结果结构集，并返回结构集中的行数line = mysql_num_rows(res_set);if (line == 0)//没有结果{LOG(MYFILES_LOG_MODULE, MYFILES_LOG_PROC, "mysql_num_rows(res_set) failed：%s\n", mysql_error(conn));ret = -1;goto END;}MYSQL_ROW row;root = cJSON_CreateObject();array = cJSON_CreateArray();// mysql_fetch_row从使用mysql_store_result得到的结果结构中提取一行，并把它放到一个行结构中。// 当数据用完或发生错误时返回NULL.while ((row = mysql_fetch_row(res_set)) != NULL){//array[i]:cJSON* item = cJSON_CreateObject();//mysql_num_fields获取结果中列的个数/*for(i = 0; i < mysql_num_fields(res_set); i++){if(row[i] != NULL){}}*//*{"user": "yoyo","md5": "e8ea6031b779ac26c319ddf949ad9d8d","time": "2017-02-26 21:35:25","filename": "test.mp4","share_status": 0,"pv": 0,"url": "http://192.168.31.109:80/group1/M00/00/00/wKgfbViy2Z2AJ-FTAaM3As-g3Z0782.mp4","size": 27473666,"type": "mp4"}*///-- user	文件所属用户if(row[0] != NULL){cJSON_AddStringToObject(item, "user", row[0]);}//-- md5 文件md5if(row[1] != NULL){cJSON_AddStringToObject(item, "md5", row[1]);}//-- createtime 文件创建时间if(row[2] != NULL){cJSON_AddStringToObject(item, "time", row[2]);}//-- filename 文件名字if(row[3] != NULL){cJSON_AddStringToObject(item, "filename", row[3]);}//-- shared_status 共享状态, 0为没有共享， 1为共享if(row[4] != NULL){cJSON_AddNumberToObject(item, "share_status", atoi( row[4] ));}//-- pv 文件下载量，默认值为0，下载一次加1if(row[5] != NULL){cJSON_AddNumberToObject(item, "pv", atol( row[5] ));}//-- url 文件urlif(row[6] != NULL){cJSON_AddStringToObject(item, "url", row[6]);}//-- size 文件大小, 以字节为单位if(row[7] != NULL){cJSON_AddNumberToObject(item, "size", atol( row[7] ));}//-- type 文件类型： png, zip, mp4……if(row[8] != NULL){cJSON_AddStringToObject(item, "type", row[8]);}cJSON_AddItemToArray(array, item);}cJSON_AddItemToObject(root, "files", array);out = cJSON_Print(root);LOG(MYFILES_LOG_MODULE, MYFILES_LOG_PROC, "%s\n", out);END:if(ret == 0){printf("%s", out); //给前端反馈信息}else{   //失败/*获取用户文件列表：成功：文件列表json失败：{"code": "015"}*/out2 = NULL;out2 = return_status("015");}if(out2 != NULL){printf(out2); //给前端反馈错误码free(out2);}if(res_set != NULL){//完成所有对数据的操作后，调用mysql_free_result来善后处理mysql_free_result(res_set);}if(conn != NULL){mysql_close(conn);}if(root != NULL){cJSON_Delete(root);}if(out != NULL){free(out);}return ret;}int main(){//count 获取用户文件个数//display 获取用户文件信息，展示到前端char cmd[20];char user[USER_NAME_LEN];char token[TOKEN_LEN];//读取数据库配置信息read_cfg();//阻塞等待用户连接while (FCGI_Accept() >= 0){// 获取URL地址 "?" 后面的内容char *query = getenv("QUERY_STRING");//解析命令query_parse_key_value(query, "cmd", cmd, NULL);LOG(MYFILES_LOG_MODULE, MYFILES_LOG_PROC, "cmd = %s\n", cmd);char *contentLength = getenv("CONTENT_LENGTH");int len;printf("Content-type: text/html\r\n\r\n");if( contentLength == NULL ){len = 0;}else{len = atoi(contentLength); //字符串转整型}if (len <= 0){printf("No data from standard input.<p>\n");LOG(MYFILES_LOG_MODULE, MYFILES_LOG_PROC, "len = 0, No data from standard input\n");}else{char buf[4*1024] = {0};int ret = 0;ret = fread(buf, 1, len, stdin); //从标准输入(web服务器)读取内容if(ret == 0){LOG(MYFILES_LOG_MODULE, MYFILES_LOG_PROC, "fread(buf, 1, len, stdin) err\n");continue;}LOG(MYFILES_LOG_MODULE, MYFILES_LOG_PROC, "buf = %s\n", buf);if (strcmp(cmd, "count") == 0) //count 获取用户文件个数{get_count_json_info(buf, user, token); //通过json包获取用户名, token//验证登陆token，成功返回0，失败-1ret = verify_token(user, token); //util_cgi.hget_user_files_count(user, ret); //获取用户文件个数}//获取用户文件信息 127.0.0.1:80/myfiles&cmd=normal//按下载量升序 127.0.0.1:80/myfiles?cmd=pvasc//按下载量降序127.0.0.1:80/myfiles?cmd=pvdescelse{int start; //文件起点int count; //文件个数get_fileslist_json_info(buf, user, token, &start, &count); //通过json包获取信息LOG(MYFILES_LOG_MODULE, MYFILES_LOG_PROC, "user = %s, token = %s, start = %d, count = %d\n", user, token, start, count);//验证登陆token，成功返回0，失败-1ret = verify_token(user, token); //util_cgi.hif(ret == 0){get_user_filelist(cmd, user, start, count); //获取用户文件列表}else{char *out = return_status("111"); //token验证失败错误码if(out != NULL){printf(out); //给前端反馈错误码free(out);}}}}}return 0;}

共享文件列表

业务逻辑，点击QT界面的共享列表，会显示背当前用户共享的文件，且是普通排序

• 点击图标会显示取消分享，属性
• 点击空白处会选项显示排行榜

共享文件列表主要涉及的是file_info和share_file_list两张表查询

main

• cmd为count，代表获取该用户共享出去的文件个数，只返回给前端共享了的文件个数

     if (strcmp(cmd, "count") == 0) //count 获取用户文件个数{get_share_files_count(); //获取共享文件个数}
  

• 解析jason包拿到拿到count，start

• 如果cmd为normal，则就按照查询顺序显示共享文件列表

• 如果cmd为pvdesc，则将查询结果按照pv字段降序排列显示共享文件列表

• 如果cmd为pvasc，则将查询结果按照pv字段升序排列显示为共享文件列表

获取共享文件个数

• get_share_files_count()，当cmd为count，则只需要查询共享文件个数

• 从user_file_count查询处用户的共享文件个数

		void get_share_files_count(){char sql_cmd[SQL_MAX_LEN] = {0};MYSQL *conn = NULL;long line = 0;//connect the databaseconn = msql_conn(mysql_user, mysql_pwd, mysql_db);if (conn == NULL){LOG(SHAREFILES_LOG_MODULE, SHAREFILES_LOG_PROC, "msql_conn err\n");goto END;}//设置数据库编码，主要处理中文编码问题mysql_query(conn, "set names utf8");sprintf(sql_cmd, "select count from user_file_count where user=\"%s\"", "xxx_share_xxx_file_xxx_list_xxx_count_xxx");char tmp[512] = {0};int ret2 = process_result_one(conn, sql_cmd, tmp); //指向sql语句if(ret2 != 0){LOG(SHAREFILES_LOG_MODULE, SHAREFILES_LOG_PROC, "%s 操作失败\n", sql_cmd);goto END;}line = atol(tmp); //字符串转长整形END:if(conn != NULL){mysql_close(conn);}LOG(SHAREFILES_LOG_MODULE, SHAREFILES_LOG_PROC, "line = %ld\n", line);printf("%ld", line); //给前端反馈的信息}

前端分页请求包

• get_fileslist_json_info

• 这个包是前端发送的post数据，封装的是物理分页的信息，然后再根据URL上的指令去做业务逻辑判断

• 解析包拿到start，count

    //解析的json包int get_fileslist_json_info(char *buf, int *p_start, int *p_count){int ret = 0;/*json数据如下{"start": 0"count": 10}*///解析json包//解析一个json字符串为cJSON对象cJSON * root = cJSON_Parse(buf);if(NULL == root){LOG(SHAREFILES_LOG_MODULE, SHAREFILES_LOG_PROC, "cJSON_Parse err\n");ret = -1;goto END;}//文件起点cJSON *child2 = cJSON_GetObjectItem(root, "start");if(NULL == child2){LOG(SHAREFILES_LOG_MODULE, SHAREFILES_LOG_PROC, "cJSON_GetObjectItem err\n");ret = -1;goto END;}*p_start = child2->valueint;//文件请求个数cJSON *child3 = cJSON_GetObjectItem(root, "count");if(NULL == child3){LOG(SHAREFILES_LOG_MODULE, SHAREFILES_LOG_PROC, "cJSON_GetObjectItem err\n");ret = -1;goto END;}*p_count = child3->valueint;END:if(root != NULL){cJSON_Delete(root);//删除json对象root = NULL;}return ret;}
  

获得普通共享文件列表

• get_share_filelist(int start, int count)

• 查出share_file_list所有记录，同时根据md5查file_info表部分文件信息并进行物理分页

• 从结果集中将记录进行一行行封装成对象；将封装好的对象加入数组；将数组加到跟对象root，将root转为字符串输出

    //获取共享文件列表//获取用户文件信息 127.0.0.1:80/sharefiles&cmd=normalint get_share_filelist(int start, int count){int ret = 0;char sql_cmd[SQL_MAX_LEN] = {0};MYSQL *conn = NULL;cJSON *root = NULL;cJSON *array =NULL;char *out = NULL;char *out2 = NULL;MYSQL_RES *res_set = NULL;//connect the databaseconn = msql_conn(mysql_user, mysql_pwd, mysql_db);if (conn == NULL){LOG(SHAREFILES_LOG_MODULE, SHAREFILES_LOG_PROC, "msql_conn err\n");ret = -1;goto END;}//设置数据库编码，主要处理中文编码问题mysql_query(conn, "set names utf8");//sql语句sprintf(sql_cmd, "select share_file_list.*, file_info.url, file_info.size, file_info.type from file_info, share_file_list where file_info.md5 = share_file_list.md5 limit %d, %d", start, count);LOG(SHAREFILES_LOG_MODULE, SHAREFILES_LOG_PROC, "%s 在操作\n", sql_cmd);if (mysql_query(conn, sql_cmd) != 0){LOG(SHAREFILES_LOG_MODULE, SHAREFILES_LOG_PROC, "%s 操作失败: %s\n", sql_cmd, mysql_error(conn));ret = -1;goto END;}res_set = mysql_store_result(conn);/*生成结果集*/if (res_set == NULL){LOG(SHAREFILES_LOG_MODULE, SHAREFILES_LOG_PROC, "smysql_store_result error!\n");ret = -1;goto END;}ulong line = 0;//mysql_num_rows接受由mysql_store_result返回的结果结构集，并返回结构集中的行数line = mysql_num_rows(res_set);if (line == 0){LOG(SHAREFILES_LOG_MODULE, SHAREFILES_LOG_PROC, "mysql_num_rows(res_set) failed\n");ret = -1;goto END;}MYSQL_ROW row;root = cJSON_CreateObject();array = cJSON_CreateArray();// mysql_fetch_row从使用mysql_store_result得到的结果结构中提取一行，并把它放到一个行结构中。// 当数据用完或发生错误时返回NULL.while ((row = mysql_fetch_row(res_set)) != NULL){//array[i]:cJSON* item = cJSON_CreateObject();//mysql_num_fields获取结果中列的个数/*for(i = 0; i < mysql_num_fields(res_set); i++){if(row[i] != NULL){}}*//*{"user": "yoyo","md5": "e8ea6031b779ac26c319ddf949ad9d8d","time": "2017-02-26 21:35:25","filename": "test.mp4","share_status": 1,"pv": 0,"url": "http://192.168.31.109:80/group1/M00/00/00/wKgfbViy2Z2AJ-FTAaM3As-g3Z0782.mp4","size": 27473666,"type": "mp4"}*///-- user	文件所属用户if(row[0] != NULL){cJSON_AddStringToObject(item, "user", row[0]);}//-- md5 文件md5if(row[1] != NULL){cJSON_AddStringToObject(item, "md5", row[1]);}//-- createtime 文件创建时间if(row[2] != NULL){cJSON_AddStringToObject(item, "time", row[2]);}//-- filename 文件名字if(row[3] != NULL){cJSON_AddStringToObject(item, "filename", row[3]);}//-- shared_status 共享状态, 0为没有共享， 1为共享cJSON_AddNumberToObject(item, "share_status", 1);//-- pv 文件下载量，默认值为0，下载一次加1if(row[4] != NULL){cJSON_AddNumberToObject(item, "pv", atol( row[4] ));}//-- url 文件urlif(row[5] != NULL){cJSON_AddStringToObject(item, "url", row[5]);}//-- size 文件大小, 以字节为单位if(row[6] != NULL){cJSON_AddNumberToObject(item, "size", atol( row[6] ));}//-- type 文件类型： png, zip, mp4……if(row[7] != NULL){cJSON_AddStringToObject(item, "type", row[7]);}cJSON_AddItemToArray(array, item);}cJSON_AddItemToObject(root, "files", array);out = cJSON_Print(root);LOG(SHAREFILES_LOG_MODULE, SHAREFILES_LOG_PROC, "%s\n", out);END:if(ret == 0){printf("%s", out); //给前端反馈信息}else{   //失败out2 = NULL;out2 = return_status("015");}if(out2 != NULL){printf(out2); //给前端反馈错误码free(out2);}if(res_set != NULL){//完成所有对数据的操作后，调用mysql_free_result来善后处理mysql_free_result(res_set);}if(conn != NULL){mysql_close(conn);}if(root != NULL){cJSON_Delete(root);}if(out != NULL){free(out);}return ret;}
  

共享文件排行榜

• 操作redis “FILE_NAME_HASH”和“FILE_PUBLIC_ZSET”两张表和MySQL“share_file_list”，完成redis和MySQL数据交互
• int get_ranking_filelist(int start, int count)
• 拿到mysql中共享文件的数量，拿到redis中的共享文件的数量进行比较
  • 不相等，更新redis数据，删除redis中所有数据（ FILE_PUBLIC_ZSET，FILE_NAME_HASH） ；再将mysql中的数据导入到mysql：查出share_file_list中md5，filename和pv字段，游标提取结果集每一行（md5+filename组成fileid和pv字段作为score一起添加到zset；将组合的fileid作为fileld，filename作为value添加到hash表）
• 将zset按照score降序排序，其中排序有分页参数start，end；
• 将排序后的集合从FILE_NAME_HASH取出filename，从FILE_PUBLIC_ZSET取出pv字段封装成对象；再将数据封装成对象转字符串后发送给前端 printf("%s", out)，会在QT界面点击排行榜时候显示

源码

	/*** @file sharefiles_cgi.c* @brief  共享文件列表展示CGI程序* @author Mike* @version 2.0* @date 2017年3月7日21:46:57*/#include "fcgi_config.h"#include "fcgi_stdio.h"#include <stdio.h>#include <stdlib.h>#include <string.h>#include "make_log.h" //日志头文件#include "util_cgi.h"#include "deal_mysql.h"#include "redis_keys.h"#include "redis_op.h"#include "cfg.h"#include "cJSON.h"#include <sys/time.h>#define SHAREFILES_LOG_MODULE       "cgi"#define SHAREFILES_LOG_PROC         "sharefiles"//mysql 数据库配置信息 用户名， 密码， 数据库名称static char mysql_user[128] = {0};static char mysql_pwd[128] = {0};static char mysql_db[128] = {0};//redis 服务器ip、端口static char redis_ip[30] = {0};static char redis_port[10] = {0};//读取配置信息void read_cfg(){//读取mysql数据库配置信息get_cfg_value(CFG_PATH, "mysql", "user", mysql_user);get_cfg_value(CFG_PATH, "mysql", "password", mysql_pwd);get_cfg_value(CFG_PATH, "mysql", "database", mysql_db);LOG(SHAREFILES_LOG_MODULE, SHAREFILES_LOG_PROC, "mysql:[user=%s,pwd=%s,database=%s]", mysql_user, mysql_pwd, mysql_db);//读取redis配置信息get_cfg_value(CFG_PATH, "redis", "ip", redis_ip);get_cfg_value(CFG_PATH, "redis", "port", redis_port);LOG(SHAREFILES_LOG_MODULE, SHAREFILES_LOG_PROC, "redis:[ip=%s,port=%s]\n", redis_ip, redis_port);}//获取共享文件个数void get_share_files_count(){char sql_cmd[SQL_MAX_LEN] = {0};MYSQL *conn = NULL;long line = 0;//connect the databaseconn = msql_conn(mysql_user, mysql_pwd, mysql_db);if (conn == NULL){LOG(SHAREFILES_LOG_MODULE, SHAREFILES_LOG_PROC, "msql_conn err\n");goto END;}//设置数据库编码，主要处理中文编码问题mysql_query(conn, "set names utf8");sprintf(sql_cmd, "select count from user_file_count where user=\"%s\"", "xxx_share_xxx_file_xxx_list_xxx_count_xxx");char tmp[512] = {0};int ret2 = process_result_one(conn, sql_cmd, tmp); //指向sql语句if(ret2 != 0){LOG(SHAREFILES_LOG_MODULE, SHAREFILES_LOG_PROC, "%s 操作失败\n", sql_cmd);goto END;}line = atol(tmp); //字符串转长整形END:if(conn != NULL){mysql_close(conn);}LOG(SHAREFILES_LOG_MODULE, SHAREFILES_LOG_PROC, "line = %ld\n", line);printf("%ld", line); //给前端反馈的信息}//解析的json包int get_fileslist_json_info(char *buf, int *p_start, int *p_count){int ret = 0;/*json数据如下{"start": 0"count": 10}*///解析json包//解析一个json字符串为cJSON对象cJSON * root = cJSON_Parse(buf);if(NULL == root){LOG(SHAREFILES_LOG_MODULE, SHAREFILES_LOG_PROC, "cJSON_Parse err\n");ret = -1;goto END;}//文件起点cJSON *child2 = cJSON_GetObjectItem(root, "start");if(NULL == child2){LOG(SHAREFILES_LOG_MODULE, SHAREFILES_LOG_PROC, "cJSON_GetObjectItem err\n");ret = -1;goto END;}*p_start = child2->valueint;//文件请求个数cJSON *child3 = cJSON_GetObjectItem(root, "count");if(NULL == child3){LOG(SHAREFILES_LOG_MODULE, SHAREFILES_LOG_PROC, "cJSON_GetObjectItem err\n");ret = -1;goto END;}*p_count = child3->valueint;END:if(root != NULL){cJSON_Delete(root);//删除json对象root = NULL;}return ret;}//获取共享文件列表//获取用户文件信息 127.0.0.1:80/sharefiles&cmd=normalint get_share_filelist(int start, int count){int ret = 0;char sql_cmd[SQL_MAX_LEN] = {0};MYSQL *conn = NULL;cJSON *root = NULL;cJSON *array =NULL;char *out = NULL;char *out2 = NULL;MYSQL_RES *res_set = NULL;//connect the databaseconn = msql_conn(mysql_user, mysql_pwd, mysql_db);if (conn == NULL){LOG(SHAREFILES_LOG_MODULE, SHAREFILES_LOG_PROC, "msql_conn err\n");ret = -1;goto END;}//设置数据库编码，主要处理中文编码问题mysql_query(conn, "set names utf8");//sql语句sprintf(sql_cmd, "select share_file_list.*, file_info.url, file_info.size, file_info.type from file_info, share_file_list where file_info.md5 = share_file_list.md5 limit %d, %d", start, count);LOG(SHAREFILES_LOG_MODULE, SHAREFILES_LOG_PROC, "%s 在操作\n", sql_cmd);if (mysql_query(conn, sql_cmd) != 0){LOG(SHAREFILES_LOG_MODULE, SHAREFILES_LOG_PROC, "%s 操作失败: %s\n", sql_cmd, mysql_error(conn));ret = -1;goto END;}res_set = mysql_store_result(conn);/*生成结果集*/if (res_set == NULL){LOG(SHAREFILES_LOG_MODULE, SHAREFILES_LOG_PROC, "smysql_store_result error!\n");ret = -1;goto END;}ulong line = 0;//mysql_num_rows接受由mysql_store_result返回的结果结构集，并返回结构集中的行数line = mysql_num_rows(res_set);if (line == 0){LOG(SHAREFILES_LOG_MODULE, SHAREFILES_LOG_PROC, "mysql_num_rows(res_set) failed\n");ret = -1;goto END;}MYSQL_ROW row;root = cJSON_CreateObject();array = cJSON_CreateArray();// mysql_fetch_row从使用mysql_store_result得到的结果结构中提取一行，并把它放到一个行结构中。// 当数据用完或发生错误时返回NULL.while ((row = mysql_fetch_row(res_set)) != NULL){//array[i]:cJSON* item = cJSON_CreateObject();//mysql_num_fields获取结果中列的个数/*for(i = 0; i < mysql_num_fields(res_set); i++){if(row[i] != NULL){}}*//*{"user": "yoyo","md5": "e8ea6031b779ac26c319ddf949ad9d8d","time": "2017-02-26 21:35:25","filename": "test.mp4","share_status": 1,"pv": 0,"url": "http://192.168.31.109:80/group1/M00/00/00/wKgfbViy2Z2AJ-FTAaM3As-g3Z0782.mp4","size": 27473666,"type": "mp4"}*///-- user	文件所属用户if(row[0] != NULL){cJSON_AddStringToObject(item, "user", row[0]);}//-- md5 文件md5if(row[1] != NULL){cJSON_AddStringToObject(item, "md5", row[1]);}//-- createtime 文件创建时间if(row[2] != NULL){cJSON_AddStringToObject(item, "time", row[2]);}//-- filename 文件名字if(row[3] != NULL){cJSON_AddStringToObject(item, "filename", row[3]);}//-- shared_status 共享状态, 0为没有共享， 1为共享cJSON_AddNumberToObject(item, "share_status", 1);//-- pv 文件下载量，默认值为0，下载一次加1if(row[4] != NULL){cJSON_AddNumberToObject(item, "pv", atol( row[4] ));}//-- url 文件urlif(row[5] != NULL){cJSON_AddStringToObject(item, "url", row[5]);}//-- size 文件大小, 以字节为单位if(row[6] != NULL){cJSON_AddNumberToObject(item, "size", atol( row[6] ));}//-- type 文件类型： png, zip, mp4……if(row[7] != NULL){cJSON_AddStringToObject(item, "type", row[7]);}cJSON_AddItemToArray(array, item);}cJSON_AddItemToObject(root, "files", array);out = cJSON_Print(root);LOG(SHAREFILES_LOG_MODULE, SHAREFILES_LOG_PROC, "%s\n", out);END:if(ret == 0){printf("%s", out); //给前端反馈信息}else{   //失败out2 = NULL;out2 = return_status("015");}if(out2 != NULL){printf(out2); //给前端反馈错误码free(out2);}if(res_set != NULL){//完成所有对数据的操作后，调用mysql_free_result来善后处理mysql_free_result(res_set);}if(conn != NULL){mysql_close(conn);}if(root != NULL){cJSON_Delete(root);}if(out != NULL){free(out);}return ret;}//获取共享文件排行版//按下载量降序127.0.0.1:80/sharefiles?cmd=pvdescint get_ranking_filelist(int start, int count){/*a) mysql共享文件数量和redis共享文件数量对比，判断是否相等b) 如果不相等，清空redis数据，从mysql中导入数据到redis (mysql和redis交互)c) 从redis读取数据，给前端反馈相应信息*/int ret = 0;char sql_cmd[SQL_MAX_LEN] = {0};MYSQL *conn = NULL;cJSON *root = NULL;RVALUES value = NULL;cJSON *array =NULL;char *out = NULL;char *out2 = NULL;char tmp[512] = {0};int ret2 = 0;MYSQL_RES *res_set = NULL;redisContext * redis_conn = NULL;//连接redis数据库redis_conn = rop_connectdb_nopwd(redis_ip, redis_port);if (redis_conn == NULL){LOG(SHAREFILES_LOG_MODULE, SHAREFILES_LOG_PROC, "redis connected error");ret = -1;goto END;}//connect the databaseconn = msql_conn(mysql_user, mysql_pwd, mysql_db);if (conn == NULL){LOG(SHAREFILES_LOG_MODULE, SHAREFILES_LOG_PROC, "msql_conn err\n");ret = -1;goto END;}//设置数据库编码，主要处理中文编码问题mysql_query(conn, "set names utf8");//===1、mysql共享文件数量sprintf(sql_cmd, "select count from user_file_count where user=\"%s\"", "xxx_share_xxx_file_xxx_list_xxx_count_xxx");ret2 = process_result_one(conn, sql_cmd, tmp); //指向sql语句if(ret2 != 0){LOG(SHAREFILES_LOG_MODULE, SHAREFILES_LOG_PROC, "%s 操作失败\n", sql_cmd);ret = -1;goto END;}int sql_num = atoi(tmp); //字符串转长整形//===2、redis共享文件数量int redis_num = rop_zset_zcard(redis_conn, FILE_PUBLIC_ZSET);if(redis_num == -1){LOG(SHAREFILES_LOG_MODULE, SHAREFILES_LOG_PROC, "rop_zset_zcard 操作失败\n");ret = -1;goto END;}LOG(SHAREFILES_LOG_MODULE, SHAREFILES_LOG_PROC, "sql_num = %d, redis_num = %d\n", sql_num, redis_num);//===3、mysql共享文件数量和redis共享文件数量对比，判断是否相等if(redis_num != sql_num){//===4、如果不相等，清空redis数据，重新从mysql中导入数据到redis (mysql和redis交互)//a) 清空redis有序数据rop_del_key(redis_conn, FILE_PUBLIC_ZSET);rop_del_key(redis_conn, FILE_NAME_HASH);//b) 从mysql中导入数据到redis//sql语句strcpy(sql_cmd, "select md5, filename, pv from share_file_list order by pv desc");LOG(SHAREFILES_LOG_MODULE, SHAREFILES_LOG_PROC, "%s 在操作\n", sql_cmd);if (mysql_query(conn, sql_cmd) != 0){LOG(SHAREFILES_LOG_MODULE, SHAREFILES_LOG_PROC, "%s 操作失败: %s\n", sql_cmd, mysql_error(conn));ret = -1;goto END;}res_set = mysql_store_result(conn);/*生成结果集*/if (res_set == NULL){LOG(SHAREFILES_LOG_MODULE, SHAREFILES_LOG_PROC, "smysql_store_result error!\n");ret = -1;goto END;}ulong line = 0;//mysql_num_rows接受由mysql_store_result返回的结果结构集，并返回结构集中的行数line = mysql_num_rows(res_set);if (line == 0){LOG(SHAREFILES_LOG_MODULE, SHAREFILES_LOG_PROC, "mysql_num_rows(res_set) failed\n");ret = -1;goto END;}MYSQL_ROW row;// mysql_fetch_row从使用mysql_store_result得到的结果结构中提取一行，并把它放到一个行结构中。// 当数据用完或发生错误时返回NULL.while ((row = mysql_fetch_row(res_set)) != NULL){//md5, filename, pvif(row[0] == NULL || row[1] == NULL || row[2] == NULL){LOG(SHAREFILES_LOG_MODULE, SHAREFILES_LOG_PROC, "mysql_fetch_row(res_set)) failed\n");ret = -1;goto END;}char fileid[1024] = {0};sprintf(fileid, "%s%s", row[0], row[1]); //文件标示，md5+文件名//增加有序集合成员rop_zset_add(redis_conn, FILE_PUBLIC_ZSET, atoi(row[2]), fileid);//增加hash记录rop_hash_set(redis_conn, FILE_NAME_HASH, fileid, row[1]);}}//===5、从redis读取数据，给前端反馈相应信息//char value[count][1024];value  = (RVALUES)calloc(count, VALUES_ID_SIZE); //堆区请求空间if(value == NULL){ret = -1;goto END;}int n = 0;int end = start + count - 1;//加载资源的结束位置//降序获取有序集合的元素ret = rop_zset_zrevrange(redis_conn, FILE_PUBLIC_ZSET, start, end, value, &n);if(ret != 0){LOG(SHAREFILES_LOG_MODULE, SHAREFILES_LOG_PROC, "rop_zset_zrevrange 操作失败\n");goto END;}root = cJSON_CreateObject();array = cJSON_CreateArray();//遍历元素个数for(int i = 0; i < n; ++i){//array[i]:cJSON* item = cJSON_CreateObject();/*{"filename": "test.mp4","pv": 0}*///-- filename 文件名字char filename[1024] = {0};ret = rop_hash_get(redis_conn, FILE_NAME_HASH, value[i], filename);if(ret != 0){LOG(SHAREFILES_LOG_MODULE, SHAREFILES_LOG_PROC, "rop_hash_get 操作失败\n");ret = -1;goto END;}cJSON_AddStringToObject(item, "filename", filename);//-- pv 文件下载量int score = rop_zset_get_score(redis_conn, FILE_PUBLIC_ZSET, value[i]);if(score == -1){LOG(SHAREFILES_LOG_MODULE, SHAREFILES_LOG_PROC, "rop_zset_get_score 操作失败\n");ret = -1;goto END;}cJSON_AddNumberToObject(item, "pv", score);cJSON_AddItemToArray(array, item);}cJSON_AddItemToObject(root, "files", array);out = cJSON_Print(root);LOG(SHAREFILES_LOG_MODULE, SHAREFILES_LOG_PROC, "%s\n", out);END:if(ret == 0){printf("%s", out); //给前端反馈信息}else{   //失败out2 = NULL;out2 = return_status("015");}if(out2 != NULL){printf(out2); //给前端反馈错误码free(out2);}if(res_set != NULL){//完成所有对数据的操作后，调用mysql_free_result来善后处理mysql_free_result(res_set);}if(redis_conn != NULL){rop_disconnect(redis_conn);}if(conn != NULL){mysql_close(conn);}if(value != NULL){free(value);}if(root != NULL){cJSON_Delete(root);}if(out != NULL){free(out);}return ret;}int main(){char cmd[20];//读取数据库配置信息read_cfg();//阻塞等待用户连接while (FCGI_Accept() >= 0){// 获取URL地址 "?" 后面的内容char *query = getenv("QUERY_STRING");//解析命令query_parse_key_value(query, "cmd", cmd, NULL);LOG(SHAREFILES_LOG_MODULE, SHAREFILES_LOG_PROC, "cmd = %s\n", cmd);printf("Content-type: text/html\r\n\r\n");if (strcmp(cmd, "count") == 0) //count 获取用户文件个数{get_share_files_count(); //获取共享文件个数}else{char *contentLength = getenv("CONTENT_LENGTH");int len;if( contentLength == NULL ){len = 0;}else{len = atoi(contentLength); //字符串转整型}if (len <= 0){printf("No data from standard input.<p>\n");LOG(SHAREFILES_LOG_MODULE, SHAREFILES_LOG_PROC, "len = 0, No data from standard input\n");}else{char buf[4*1024] = {0};int ret = 0;ret = fread(buf, 1, len, stdin); //从标准输入(web服务器)读取内容if(ret == 0){LOG(SHAREFILES_LOG_MODULE, SHAREFILES_LOG_PROC, "fread(buf, 1, len, stdin) err\n");continue;}LOG(SHAREFILES_LOG_MODULE, SHAREFILES_LOG_PROC, "buf = %s\n", buf);//获取共享文件信息 127.0.0.1:80/sharefiles&cmd=normal//按下载量升序 127.0.0.1:80/sharefiles?cmd=pvasc//按下载量降序127.0.0.1:80/sharefiles?cmd=pvdescint start; //文件起点int count; //文件个数get_fileslist_json_info(buf, &start, &count); //通过json包获取信息LOG(SHAREFILES_LOG_MODULE, SHAREFILES_LOG_PROC, "start = %d, count = %d\n", start, count);if (strcmp(cmd, "normal") == 0){get_share_filelist(start, count); //获取共享文件列表}else if(strcmp(cmd, "pvdesc") == 0){get_ranking_filelist(start, count);//获取共享文件排行版}}}}return 0;}