对于我的项目(对于游戏来说),我需要一个C网络接口。我想用Python编写我的项目代码,所以我用C TCP-Socket函数创建了一个C ++包装器,在我的Python代码中用它c-types
:
#include <iostream>
#include <string>
#include "Socket.h"
#include "stdio.h"
void Socket::s_connect(char *host, int port){
const char *str;
pe = getprotobyname("tcp");
if (!pe){
perror("Error get protocol");
exit(1);
}
f = socket(AF_INET, SOCK_STREAM, pe->p_proto);
if (f == -1){
perror("Error create socker");
exit(1);
}
s_in.sin_family = AF_INET;
s_in.sin_port = htons(port);
s_in.sin_addr.s_addr = inet_addr(host);
if (connect(f, (const struct sockaddr *&)s_in, sizeof(s_in)) == -1){
perror("Error on connect");
close(f);
}
}
void Socket::s_send(char *msg){
if (write(f, msg, strlen(msg)) == -1){
printf("error write\n");
perror("write");
exit(1);
}
}
char *Socket::s_recv(){
char *buff;
int ret;
buff = (char *)malloc(4096);
ret = read(f, buff, 4096);
if (ret < 0){
if (close(f))
exit(1);
}
return buff;
}
extern "C" {
Socket *Socket_new()
{
return (new Socket);
}
void Socket_connect(Socket *sock, char *host, int port)
{
sock->s_connect(host, port);
}
void Socket_send(Socket *sock, char *msg)
{
sock->s_send(msg);
}
}
Socket.h:
#ifndef SOCKET_HPP_
# define SOCKET_HPP_
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <errno.h>
class Socket {
int f, port;
struct protoent *pe;
struct sockaddr_in s_in;
char *ip;
public:
void s_connect(char *host, int port);
void s_send(char * msg);
char *s_recv();
};
#endif
还有我的Python课程:
#!/usr/bin/python
import sys
from ctypes import cdll
lib = cdll.LoadLibrary('./libsocket.so')
class Socket(object):
def __init__(self):
self.obj = lib.Socket_new()
def s_connect(self, host, port):
print(host, port)
lib.Socket_connect(self.obj, host, int(port))
def s_send(self, msg):
lib.Socket_send(self.obj, msg)
def s_recv(self):
lib.Socket_recv(self.obj)
def main(arg):
sock = Socket()
sock.s_connect(arg[1], arg[2])
sock.s_send("coucou")
if __name__ == "__main__":
main(sys.argv)
我的extern C func
无法读取从Python发送的字符串我可以发送端口号,但我的C ++函数无法读取主机的字符串值。
如果我将char *
更改为std::string
,我会遇到同样的问题。
我做错了吗?
由于
答案 0 :(得分:1)
正如您所说的使用Python 3版本,str
模块的文档指出Python unicode字符串(wchar_t *
)对应于C(bytes
)中的宽字符数组,并且Python字节字符串(char *
)对应于窄字符数组(bytes
)。
因此,如果您想要实际处理unicode字符,您应该:
使用sock.s_connect(arg[1].encode('latin1'), arg[2])
Python端(平凡):
wchar_t
或使用button {
color: red;
font-family: sans-serif;
}
C方面(可能更难......)