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修复了cjson的bug

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chang 2023-10-25 10:47:08 +08:00
parent dd66f9b1c6
commit 2c30d489b2
3 changed files with 36 additions and 30 deletions
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2
cgi-bin/Makefile
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@ -1,7 +1,7 @@
all: all:
sqlite_cgi_base: sqlite_cgi_base:
gcc sqlite3.c sqlite_cgi_base.c -o sqlite_cgi_base -lpthread -ldl gcc sqlite3.c sqlite_cgi_base.c -o sqlite_cgi_base -lpthread -ldl -lcjson
clean: clean:
rm -rf sqlite_cgi_base rm -rf sqlite_cgi_base

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cgi-bin/sqlite_cgi_base Executable file
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64
cgi-bin/sqlite_cgi_base.c
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@ -1,60 +1,65 @@
#include "sqlite3.h"
#include <stdio.h>
#include <cjson/cJSON.h> #include <cjson/cJSON.h>
#include <stdio.h>
// #include "cJSON.h"
#include "sqlite3.h"
int main(int argc, char const *argv[]) int main(int argc, char const* argv[]) {
{
// 连接到 SQLite 数据库 // 连接到 SQLite 数据库
sqlite3 *db; // 声明 sqlite3 类型变量，即声明一个数据库对象 sqlite3* db; // 声明 sqlite3 类型变量，即声明一个数据库对象
char *zErrMsg = 0; // 用于存储错误信息 char* zErrMsg = 0; // 用于存储错误信息
int rc; // 用于存储函数返回值 int rc; // 用于存储函数返回值
rc = sqlite3_open("../sql_base/green_house.db", &db); // 打开指定的数据库文件，如果不存在将创建一个同名的数据库文件 rc = sqlite3_open(
if (rc) "../sql_base/green_house.db",
{ &db); // 打开指定的数据库文件，如果不存在将创建一个同名的数据库文件
if (rc) {
fprintf(stderr, "Can't open database: %s\n", sqlite3_errmsg(db)); fprintf(stderr, "Can't open database: %s\n", sqlite3_errmsg(db));
sqlite3_close(db); sqlite3_close(db);
return 1; return 1;
} }
fprintf(stderr, "好 Opened database successfully\n"); fprintf(stderr, "ok Opened database successfully\n");
// 获取前端传递的 JSON 数据 // 获取前端传递的 JSON 数据
char request_data[128] = ""; char request_data[128] = "";
fgets(request_data, 128, stdin); // 从标准输入中读取一行数据 fgets(request_data, 128, stdin); // 从标准输入中读取一行数据
// 解析 JSON 数据 // 解析 JSON 数据
cJSON *json_buf = cJSON_parse(request_data); // 解析 JSON 数据 cJSON* json_buf = cJSON_Parse(request_data); // 解析 JSON 数据
if (json_buf == NULL) if (json_buf == NULL) {
{
fprintf(stderr, "Error parsing JSON data\n"); fprintf(stderr, "Error parsing JSON data\n");
sqlite3_close(db); sqlite3_close(db);
return 1; return 1;
} }
// 获取用户名和密码 // 获取用户名和密码
cJSON *user = cJSON_GetObjectItemCaseSensitive(json_buf, "name"); cJSON* user = cJSON_GetObjectItemCaseSensitive(json_buf, "name");
cJSON *password = cJSON_GetObjectItemCaseSensitive(json_buf, "password"); cJSON* password = cJSON_GetObjectItemCaseSensitive(json_buf, "password");
if (user == NULL || password == NULL || !cJSON_IsString(user) || !cJSON_IsString(password)) if (user == NULL || password == NULL || !cJSON_IsString(user) ||
{ !cJSON_IsString(password)) {
fprintf(stderr, "Error getting username and/or password from JSON data\n"); fprintf(stderr,
"Error getting username and/or password from JSON data\n");
cJSON_Delete(json_buf); cJSON_Delete(json_buf);
sqlite3_close(db); sqlite3_close(db);
return 1; return 1;
} }
// 拿到用户名和密码 // 拿到用户名和密码
char *username_from_frontend = user->valuestring; char* username_from_frontend = user->valuestring;
char *password_from_frontend = password->valuestring; char* password_from_frontend = password->valuestring;
printf("username is %s, pwd is %s\n", username_from_frontend,
password_from_frontend);
// 构建查询语句 // 构建查询语句
char query_sql[128] = ""; char query_sql[128] = "";
sprintf(query_sql, "select * from login_users where username='%s' and password='%s'", username_from_frontend, password_from_frontend); // 构建查询语句 sprintf(query_sql,
"select * from login_users where username='%s' and password='%s'",
username_from_frontend, password_from_frontend); // 构建查询语句
// 执行查询语句 // 执行查询语句
rc = sqlite3_exec(db, query_sql, 0, 0, &zErrMsg); // 执行查询语句 rc = sqlite3_exec(db, query_sql, 0, 0, &zErrMsg); // 执行查询语句
if (rc != SQLITE_OK) if (rc != SQLITE_OK) {
{
fprintf(stderr, "SQL error: %s\n", zErrMsg); fprintf(stderr, "SQL error: %s\n", zErrMsg);
sqlite3_free(zErrMsg); sqlite3_free(zErrMsg);
cJSON_Delete(json_buf); cJSON_Delete(json_buf);
@ -63,12 +68,13 @@ int main(int argc, char const *argv[])
} }
// 构建 JSON 数据 // 构建 JSON 数据
cJSON *result_json = cJSON_CreateObject(); cJSON* result_json = cJSON_CreateObject();
cJSON_AddItemToObject(result_json, "result", cJSON_CreateString("success")); cJSON_AddItemToObject(result_json, "result", cJSON_CreateString("success"));
cJSON_AddItemToObject(result_json, "username", cJSON_CreateString(username_from_frontend)); cJSON_AddItemToObject(result_json, "username",
cJSON_CreateString(username_from_frontend));
// 打印 JSON 数据 // 打印 JSON 数据
char *result_json_str = cJSON_Print(result_json); char* result_json_str = cJSON_Print(result_json);
printf("%s\n", result_json_str); printf("%s\n", result_json_str);
// 释放资源 // 释放资源