图片 二进制 存入 mysql

经过一天的努力，终于实现了把图片转换成二进制存入mysql了！

兴奋！

代码！

#include <stdio.h>
#include "/usr/local/mysql/include/mysql.h"
#include <stdlib.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <string.h>

#define host            "192.168.1.214"       //mysql server
#define username        "zyz"
#define password        "12345678"
#define database         "gps2008"

int get_file_size(char *path, off_t *size)
{
 struct stat file_stats;
 
 if(stat(path, &file_stats))
  return -1;
 
 *size = file_stats.st_size;
 return 0;
}
int main(int argc, char *argv[])
{
 char  *filename;
 off_t  size;
 
 MYSQL            *conn;
 MYSQL_RES    *res_set;
 MYSQL_ROW    row;
 MYSQL_FIELD *field;
 int                   i, flag;
 char                *sql;
 FILE                *fp;
 char                *buf;
 int                    n=0;
 char                *end;
 unsigned long *length; 
 
 filename = "/home/zyz1/la213.bmp";
 if ((get_file_size(filename, &size)) == -1) {
  perror("get file size" );
  exit(1);
 }
 
 if ((buf = (char *)malloc(sizeof(char)*(size+1))) == NULL) {
  perror("malloc buf" );
  exit(1);
 }
 
 if ((fp = fopen(filename, "rb" )) == NULL) {
  perror("fopen file" );
  exit(1);
 }
 
 if ((n = fread(buf, 1, size, fp)) < 0) { //n=*size
  perror("fread file" );
  exit(1);
 }
 
 sql = (char *)malloc(sizeof(char)*n*2+256); //2n+1+strlen(other sql)
 if (sql == NULL) {
  perror("malloc sql" );
  exit(1);
 }
 
 conn = mysql_init(NULL);
 if (conn == NULL) {
  printf("init mysql, %s/n", mysql_error(conn));
  exit(1);
 }
 
 if ((mysql_real_connect(conn, host, username, password, database, 0, NULL, 0)) == NULL) {
  printf("connect mysql, %s/n", mysql_error(conn));
  exit(1);
 }
 
 strcpy(sql, "insert into message(message) values(");
 end = sql;
 end += strlen(sql);  //point sql tail
 //convert NUL(ASCII 0)、'/n'、'/r'、'/'’、'''、'"'、Control-Z and so on
 *end++ = '/'';
 end += mysql_real_escape_string(conn, end, buf, n);
 *end++ = '/'';
 *end++ = ')';
 
 flag = mysql_real_query(conn, sql, (unsigned int)(end-sql));
 if (flag != 0) {
  printf("insert failed, %s/n", mysql_error(conn));
  exit(1);
 }
 
 if ((mysql_real_query(conn, "select message from message where id=5", 31)) != 0) {
  printf("select failed, %s/n", mysql_error(conn));
  exit(1);
 }
 res_set = mysql_store_result(conn);
 
 fclose(fp);
 fp = NULL;
 
 fp = fopen("foo.bk", "wb" );
 while ((row = mysql_fetch_row(res_set)) != NULL) {
  length = mysql_fetch_lengths(res_set);
  for (i=0; i<mysql_num_fields(res_set); i++) {
   fwrite(row[0], 1, length[0], fp);
  }
 }
 
 fclose(fp);
 mysql_close(conn);
 free(sql);
 sql = NULL;
 
 return 0;
}