c语言调用sqlite

db sqlite c语言

#ifndef _DB_PLUGIN_H_
#define _DB_PLUGIN_H_
#pragma warning(disable: 4996)
//#include "mongoose.h"//typedef struct mg_keyvalue
//{//  char *key;
//  int klen ;
//  char *value;
//  int vlen;
//}mg_keyvalue;void *db_open(const char *db_path);
void db_close(void **db_handle);enum { API_OP_GET, API_OP_SET, API_OP_DEL };char *db_op_select_content(void *db, const char *tablename ,const char *id);
//void db_op(const char *key, void *db, int op);#endif /* CS_MONGOOSE_EXAMPLES_API_SERVER_DB_PLUGIN_H_ */#include "db_plugin.h"
#include "sqlite3.h"
//#include "time.h"
#include <stdio.h>
#include <stdlib.h>
//void time_get(char * buf)
//{//  time_t rawtime;
//  struct tm * timeinfo;
//  time(&rawtime);
//  timeinfo = localtime(&rawtime);
//  strcpy(buf, asctime(timeinfo));
//}void *db_open(const char *db_path) {sqlite3 *db = NULL;if (sqlite3_open_v2(db_path, &db, SQLITE_OPEN_READWRITE | SQLITE_OPEN_CREATE |SQLITE_OPEN_FULLMUTEX,NULL) == SQLITE_OK) {char *sql = "CREATE TABLE IF NOT EXISTS log([key] TEXT, [val] TEXT,[category] TEXT, [infotime] TimeStamp NOT NULL DEFAULT(datetime('now', 'localtime'))";sqlite3_exec(db,sql, 0, 0, 0);}return db;
}void db_close(void **db_handle) {if (db_handle != NULL && *db_handle != NULL) {sqlite3_close(*db_handle);*db_handle = NULL;}
}char *db_op_select_content(void *db,const char *tablename , const char *id)
{sqlite3_stmt *stmt = NULL;const char *data = NULL;int result;char buffer[128];sprintf(buffer, "SELECT * FROM %s WHERE id = ?;", tablename);if (sqlite3_prepare_v2(db, buffer, -1, &stmt,NULL) == SQLITE_OK) {sqlite3_bind_text(stmt, 1, id, strlen(id), SQLITE_STATIC);result = sqlite3_step(stmt);data = (char *)sqlite3_column_text(stmt, 0);if ((result == SQLITE_OK || result == SQLITE_ROW) && data != NULL) {char * content = malloc(strlen(data));/* mg_printf(nc,"HTTP/1.1 200 OK\r\n""Content-Type: text/plain\r\n""Content-Length: %d\r\n\r\n%s",(int) strlen(data), data);*/}else {//mg_printf(nc, "%s",//          "HTTP/1.1 404 Not Found\r\n"//          "Content-Length: 0\r\n\r\n");}sqlite3_finalize(stmt);}else {//mg_printf(nc, "%s",//          "HTTP/1.1 500 Server Error\r\n"//          "Content-Length: 0\r\n\r\n");}}static void op_set( const char *param, void *db) {sqlite3_stmt *stmt = NULL;//char value[200];//const struct mg_str *body =//   hm->query_string.len > 0 ? &hm->query_string : &hm->body;char key[64];char value[512];char time[32];//mg_get_http_var(&hm->body, "key", key, sizeof(key));//mg_get_http_var(&hm->body, "value", value, sizeof(value));
//  time_get(time);if (sqlite3_prepare_v2(db, "INSERT OR REPLACE INTO log VALUES (?, ?, ?);", -1,&stmt, NULL) == SQLITE_OK) {sqlite3_bind_text(stmt, 1, key, strlen(key), SQLITE_STATIC);sqlite3_bind_text(stmt, 2, value, strlen(value), SQLITE_STATIC);sqlite3_bind_text(stmt, 3, time, strlen(time), SQLITE_STATIC);sqlite3_step(stmt);sqlite3_finalize(stmt);}//mg_printf(nc, "%s", "HTTP/1.1 200 OK\r\nContent-Length: 0\r\n\r\n");//printf("test is ok");// mg_printf_http_chunk(nc, "{ \"result\": %ld }", 1);//mg_send_http_chunk(nc, "", 0); /* Send empty chunk, the end of response */}static void op_get(const char *id, void *db) {sqlite3_stmt *stmt = NULL;const char *data = NULL;int result;//(void) hm;if (sqlite3_prepare_v2(db, "SELECT * FROM log WHERE key = ?;", -1, &stmt,NULL) == SQLITE_OK) {sqlite3_bind_text(stmt, 1, id, strlen(id), SQLITE_STATIC);result = sqlite3_step(stmt);data = (char *) sqlite3_column_text(stmt, 0);if ((result == SQLITE_OK || result == SQLITE_ROW) && data != NULL) {/* mg_printf(nc,"HTTP/1.1 200 OK\r\n""Content-Type: text/plain\r\n""Content-Length: %d\r\n\r\n%s",(int) strlen(data), data);*/} else {//mg_printf(nc, "%s",//          "HTTP/1.1 404 Not Found\r\n"//          "Content-Length: 0\r\n\r\n");}sqlite3_finalize(stmt);} else {//mg_printf(nc, "%s",//          "HTTP/1.1 500 Server Error\r\n"//          "Content-Length: 0\r\n\r\n");}
}static void op_del(struct mg_connection *nc, const struct http_message *hm,const struct mg_str *key, void *db) {//sqlite3_stmt *stmt = NULL;
//  int result;//(void) hm;//if (sqlite3_prepare_v2(db, "DELETE FROM log WHERE key = ?;", -1, &stmt,//                       NULL) == SQLITE_OK) {//  sqlite3_bind_text(stmt, 1, key->p, key->len, SQLITE_STATIC);//  result = sqlite3_step(stmt);//  if (result == SQLITE_OK || result == SQLITE_ROW) {//    mg_printf(nc, "%s", "HTTP/1.1 200 OK\r\nContent-Length: 0\r\n\r\n");//  } else {//    mg_printf(nc, "%s",//              "HTTP/1.1 404 Not Found\r\n"//              "Content-Length: 0\r\n\r\n");//  }//  sqlite3_finalize(stmt);//} else {//  mg_printf(nc, "%s",//            "HTTP/1.1 500 Server Error\r\n"//            "Content-Length: 0\r\n\r\n");//}
}void db_op(const char *key, void *db, int op) {switch (op) {case API_OP_GET:op_get(key, db);break;case API_OP_SET://op_set(nc, hm, key, db);break;case API_OP_DEL://op_del(nc, hm, key, db);break;default://mg_printf(nc, "%s",//          "HTTP/1.0 501 Not Implemented\r\n"//          "Content-Length: 0\r\n\r\n");break;}
}

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c语言调用sqlite

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