int n = atoi(getenv("CONTENT_LENGTH")) - strlen(boundary);
char *buff = (char *)malloc(n+1);
fread(buff,1,n,stdin);
FILE *fp;
fp = fopen(SAVE_PATH,"wb+");
char *p = strstr(buff,"\n");
p ++;
p = strstr(p,"\n");
p ++;
p = strstr(p,"\n");
p ++;
p = strstr(p,"\n");
p ++;
int m = p - buff;
fwrite(p,1,(n - m + 1),fp);
fclose(fp);
fflush(stdout);
return 1;
}