samples: sockets: http_get: More configurability and logging

Make it easy to override HTTP host/port/path. Print URL which we
request and make few other adjustment to the output for clarity.

Signed-off-by: Paul Sokolovsky <paul.sokolovsky@linaro.org>

samples/net/sockets/http_get/src/http_get.c

@@ -22,17 +22,25 @@
 
 #endif
 
+/* HTTP server to connect to */
+#define HTTP_HOST "google.com"
+/* Port to connect to, as string */
+#define HTTP_PORT "80"
+/* HTTP path to request */
+#define HTTP_PATH "/"
+
+
 #define SSTRLEN(s) (sizeof(s) - 1)
 #define CHECK(r) { if (r == -1) { printf("Error: " #r "\n"); } }
 
-#define REQUEST "GET / HTTP/1.0\r\n\r\n"
+#define REQUEST "GET " HTTP_PATH " HTTP/1.0\r\n\r\n"
 
 static char response[1024];
 
 void dump_addrinfo(const struct addrinfo *ai)
 {
-	printf("addrinfo @%p: fam=%d, socktype=%d, proto=%d, "
-	       "addr_fam=%d, addr_port=%x\n",
+	printf("addrinfo @%p: ai_family=%d, ai_socktype=%d, ai_protocol=%d, "
+	       "sa_family=%d, sin_port=%x\n",
 	       ai, ai->ai_family, ai->ai_socktype, ai->ai_protocol,
 	       ai->ai_addr->sa_family,
 	       ((struct sockaddr_in *)ai->ai_addr)->sin_port);
@@ -44,9 +52,12 @@ int main(void)
 	struct addrinfo *res;
 	int st, sock;
 
+	printf("Preparing HTTP GET request for http://" HTTP_HOST
+	       ":" HTTP_PORT HTTP_PATH "\n");
+
 	hints.ai_family = AF_INET;
 	hints.ai_socktype = SOCK_STREAM;
-	st = getaddrinfo("google.com", "80", &hints, &res);
+	st = getaddrinfo(HTTP_HOST, HTTP_PORT, &hints, &res);
 	printf("getaddrinfo status: %d\n", st);
 
 	if (st != 0) {
@@ -68,7 +79,7 @@ int main(void)
 	CHECK(connect(sock, res->ai_addr, res->ai_addrlen));
 	send(sock, REQUEST, SSTRLEN(REQUEST), 0);
 
-	printf("Response:\n");
+	printf("Response:\n\n");
 
 	while (1) {
 		int len = recv(sock, response, sizeof(response) - 1, 0);
@@ -83,8 +94,10 @@ int main(void)
 		}
 
 		response[len] = 0;
-		printf("%s", response);
+		printf("%s\n", response);
 	}
 
+	close(sock);
+
 	return 0;
 }