From e339f2d269fcaffed7beed67c3995fe3b67393eb Mon Sep 17 00:00:00 2001
From: Guangxiong Lin <hi@gxlin.org>
Date: Sat, 17 Dec 2022 21:24:04 +0800
Subject: Support on_connect function in server lib

---
 example/Makefile | 21 +++++++++++++++++++++
 example/client.c | 47 +++++++++++++++++++++++++++++++++++++++++++++++
 example/server.c | 36 ++++++++++++++++++++++++++++++++++++
 3 files changed, 104 insertions(+)
 create mode 100644 example/Makefile
 create mode 100644 example/client.c
 create mode 100644 example/server.c

(limited to 'example')

diff --git a/example/Makefile b/example/Makefile
new file mode 100644
index 0000000..6f0fff8
--- /dev/null
+++ b/example/Makefile
@@ -0,0 +1,21 @@
+SERVER_NAME=server
+SERVER_OBJ=server.o ../src/server.o ../src/tsocket.o ../src/util.o ../src/evloop.o ../src/tpool.o ../src/connection.o ../src/acceptor.o
+
+CLIENT_NAME=client
+CLIENT_OBJ=client.o ../src/util.o
+
+.PHONY: all
+all: $(SERVER_NAME) $(CLIENT_NAME)
+
+%.o: %.c
+	$(CC) -c $(CFLAGS) $< -o $@
+
+$(SERVER_NAME): $(SERVER_OBJ)
+	$(CC) -o $@ $^
+
+$(CLIENT_NAME): $(CLIENT_OBJ)
+	$(CC) -o $@ $^
+
+.PHONY: clean
+clean:
+	rm -rf $(CLIENT_NAME) $(SERVER_NAME) *.o
diff --git a/example/client.c b/example/client.c
new file mode 100644
index 0000000..56ba072
--- /dev/null
+++ b/example/client.c
@@ -0,0 +1,47 @@
+#include <sys/socket.h>
+#include <arpa/inet.h>
+#include <strings.h>
+#include <sys/types.h>
+#include <unistd.h>
+#include <stdbool.h>
+#include <stdio.h>
+
+#include "../src/util.h"
+
+int main()
+{
+    int sockfd = socket(AF_INET, SOCK_STREAM, 0);
+    if (sockfd == -1)
+        panic("socket creation error");
+
+    struct sockaddr_in serv_addr;
+    bzero(&serv_addr, sizeof(serv_addr));
+    serv_addr.sin_family = AF_INET;
+    serv_addr.sin_addr.s_addr = inet_addr("127.0.0.1");
+    serv_addr.sin_port = htons(8888);
+
+    if (connect(sockfd, (struct sockaddr *)&serv_addr, sizeof(serv_addr)) == -1)
+        panic("socket connect error");
+
+    for (;;) {
+        char buf[1024];
+        bzero(&buf, sizeof(buf));
+        scanf("%s", buf);
+        ssize_t n_write_bytes = write(sockfd, buf, sizeof(buf));
+        if (n_write_bytes == -1) {
+            printf("socket already disconnected, cannot write any more!\n");
+            break;
+        }
+
+        ssize_t n_read_bytes = read(sockfd, buf, sizeof(buf));
+        if (n_read_bytes > 0) {
+            printf("message from server: %s\n", buf);
+        } else if (n_read_bytes == 0) {
+            printf("server socket disconnected!\n");
+            break;
+        } else if (n_read_bytes == -1) {
+            close(sockfd);
+            panic("socket read error");
+        }
+    }
+}
diff --git a/example/server.c b/example/server.c
new file mode 100644
index 0000000..fe8cba9
--- /dev/null
+++ b/example/server.c
@@ -0,0 +1,36 @@
+#include <errno.h>
+#include <unistd.h>
+#include <stdio.h>
+
+#include "../src/server.h"
+#include "../src/connection.h"
+
+#define READ_BUFFER_SIZE 1024
+
+static void echo(connection_t *conn)
+{
+    char buf[READ_BUFFER_SIZE];
+    ssize_t n_read_bytes;
+    int fd = connection_fd(conn);
+
+    for (;;) {
+        n_read_bytes = read(fd, buf, sizeof(buf));
+        if (n_read_bytes > 0) {
+            printf("message from conn %d: %s\n", fd, buf);
+            write(fd, buf, sizeof(buf));
+        } else if (n_read_bytes == 0) {
+            printf("conn %d disconnected\n", fd);
+            return;
+        } else if (n_read_bytes == -1) {
+            if (errno == EAGAIN || errno == EWOULDBLOCK)
+                break;
+        }
+    }
+}
+
+int main()
+{
+    server_t *serv = server_create();
+    server_on_connect(serv, echo);
+    server_run(serv);
+}
-- 
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