[英]communicate c program and php
I want to have a web page (written in php because it's what i know) that displays an input value. 我想要一个显示输入值的网页(用PHP编写,因为它是我所知道的)。 I want that value to be passed to ac programa that's already running.
我希望将该值传递给已经运行的ac程序。
I though of using sockets to communicate between both process, but how do I manage to do that? 我虽然使用套接字在两个进程之间进行通信,但我该如何设法做到这一点? how can I use fsockopen to connect to a local socket.
如何使用fsockopen连接到本地套接字。
Some simple solutions I can think of are: 我能想到的一些简单的解决方案是:
You could use redis as your ipc using hiredis as your c client library. 您可以使用redis作为您的ipc,使用hiredis作为您的c客户端库。 I never used hiredis library before but did it just now for you to test and the library is really good.
我以前从未使用过hiredis库,但是刚刚做了测试,库真的很棒。 I could have known it because redis is the best piece of C code I know :).
我可以知道它,因为redis是我知道的最好的C代码:)。
modify example.c 修改example.c
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "hiredis.h"
int main(void) {
redisContext *c;
redisReply *reply;
c = redisConnect((char*)"127.0.0.1", 6379);
if (c->err) {
printf("Connection error: %s\n", c->errstr);
redisFree(c);
exit(1);
}
/* Blocking pop. */
reply = redisCommand(c, "BLPOP php 0");
if (reply->type == REDIS_REPLY_ARRAY) {
if (reply->elements == 2) {
printf("%s\n", reply->element[1]->str);
}
}
freeReplyObject(reply);
redisFree(c);
return 0;
}
Compile and run example: 编译并运行示例:
make
./hiredis-example
from ./redis-cli: 来自./redis-cli:
from another tab start start redis-cli(for prototyping) and issue the following command. 从另一个选项卡开始启动redis-cli(用于原型设计)并发出以下命令。 You should replace this with predis as php client library, but that is going to be very easy:
您应该将此替换为predis作为php客户端库,但这将非常简单:
lpush php "Hello from PHP"
Inside running hiredis-example: 在里面运行hiredis-example:
You should see the message "Hello from PHP". 您应该看到消息“来自PHP的Hello”。 Easy as pie if you ask me :).
如果你问我:)就像馅饼一样容易。
You could use a named pipes . 您可以使用命名管道 。
You could read the Beej's Guide to Network Programming Using Internet Sockets . 您可以阅读Beej的使用Internet套接字进行网络编程的指南 。 In my opinion this is a very good read.
在我看来,这是一个非常好的阅读。
A local socket is just a file, you'd use fopen()
, fwrite()
, and fclose()
on it, as usual. 本地套接字只是一个文件,你可以像往常一样使用
fopen()
, fwrite()
和fclose()
。 The only difference is that you're reading from (or writing to) another process, instead of a file on disk somewhere. 唯一的区别是你正在读取(或写入)另一个进程,而不是某处某个磁盘上的文件。
You can use a named pipe. 您可以使用命名管道。
Here is a working example where the php script sends a request to a C daemon and then waits for the response. 这是一个工作示例,其中php脚本向C守护程序发送请求,然后等待响应。 It uses Unix domain sockets in datagram mode so it is fast.
它在数据报模式下使用Unix域套接字,因此速度很快。
client.php client.php
<?php
$file = "/tmp/myclient.sock";
unlink($file);
$socket = socket_create(AF_UNIX, SOCK_DGRAM, 0);
if (socket_bind($socket, $file) === false) {
echo "bind failed";
}
socket_sendto($socket, "Hello world!", 12, 0, "/tmp/myserver.sock", 0);
echo "sent\n";
if (socket_recvfrom($socket, $buf, 64 * 1024, 0, $source) === false) {
echo "recv_from failed";
}
echo "received: [" . $buf . "] from: [" . $source . "]\n";
?>
server.c server.c
#include <stdio.h>
#include <sys/un.h>
#include <sys/socket.h>
#define SOCKET_FILE "/tmp/myserver.sock"
#define BUF_SIZE 64 * 1024
int main() {
struct sockaddr_un server_address = {AF_UNIX, SOCKET_FILE};
int sock = socket(AF_UNIX, SOCK_DGRAM, 0);
if (sock <= 0) {
perror("socket creation failed");
return 1;
}
unlink(SOCKET_FILE);
if (bind(sock, (const struct sockaddr *) &server_address, sizeof(server_address)) < 0) {
perror("bind failed");
close(sock);
return 1;
}
for (;;) {
struct sockaddr_un client_address;
int i, numBytes, len = sizeof(struct sockaddr_un);
char buf[BUF_SIZE];
numBytes = recvfrom(sock, buf, BUF_SIZE, 0, (struct sockaddr *) &client_address, &len);
if (numBytes == -1) puts("recvfrom failed");
printf("Server received %d bytes from %s\n", numBytes, client_address.sun_path);
for (i = 0; i < numBytes; i++)
buf[i] = toupper((unsigned char) buf[i]);
if (sendto(sock, buf, numBytes, 0, (struct sockaddr *) &client_address, len) != numBytes)
puts("sendto failed");
}
}
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