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Add some comments to embedded_c example

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This commit is contained in:
bel
2015-10-02 20:53:06 +02:00
parent 164b12b558
commit 0b1ce03d0c
1 changed files with 20 additions and 7 deletions
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27
examples/embedded_c/embedded_c.c
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@ -132,6 +132,7 @@ int WebSocketStartHandler(struct mg_connection *conn, void *cbdata)
mg_printf(conn, "<html>\n<head>\n"); mg_printf(conn, "<html>\n<head>\n");
mg_printf(conn, "<meta charset=\"UTF-8\">\n"); mg_printf(conn, "<meta charset=\"UTF-8\">\n");
mg_printf(conn, "<title>Embedded websocket example</title>\n"); mg_printf(conn, "<title>Embedded websocket example</title>\n");
#ifdef USE_WEBSOCKET #ifdef USE_WEBSOCKET
/* mg_printf(conn, "<script type=\"text/javascript\"><![CDATA[\n"); ... /* mg_printf(conn, "<script type=\"text/javascript\"><![CDATA[\n"); ...
* xhtml style */ * xhtml style */
@ -163,6 +164,7 @@ int WebSocketStartHandler(struct mg_connection *conn, void *cbdata)
mg_printf(conn, "Example not compiled with USE_WEBSOCKET\n"); mg_printf(conn, "Example not compiled with USE_WEBSOCKET\n");
#endif #endif
mg_printf(conn, "</body>\n</html>\n"); mg_printf(conn, "</body>\n</html>\n");
return 1; return 1;
} }
@ -178,6 +180,7 @@ struct t_ws_client {
int state; int state;
} static ws_clients[MAX_WS_CLIENTS]; } static ws_clients[MAX_WS_CLIENTS];
#define ASSERT(x) \ #define ASSERT(x) \
{ \ { \
if (!(x)) { \ if (!(x)) { \
@ -186,7 +189,6 @@ struct t_ws_client {
} \ } \
} }
static unsigned long cnt;
int WebSocketConnectHandler(const struct mg_connection *conn, void *cbdata) int WebSocketConnectHandler(const struct mg_connection *conn, void *cbdata)
{ {
@ -212,6 +214,7 @@ int WebSocketConnectHandler(const struct mg_connection *conn, void *cbdata)
return reject; return reject;
} }
void WebSocketReadyHandler(struct mg_connection *conn, void *cbdata) void WebSocketReadyHandler(struct mg_connection *conn, void *cbdata)
{ {
const char *text = "Hello from the websocket ready handler"; const char *text = "Hello from the websocket ready handler";
@ -225,6 +228,7 @@ void WebSocketReadyHandler(struct mg_connection *conn, void *cbdata)
client->state = 2; client->state = 2;
} }
int WebsocketDataHandler(struct mg_connection *conn, int WebsocketDataHandler(struct mg_connection *conn,
int bits, int bits,
char *data, char *data,
@ -242,6 +246,7 @@ int WebsocketDataHandler(struct mg_connection *conn,
return 1; return 1;
} }
void WebSocketCloseHandler(const struct mg_connection *conn, void *cbdata) void WebSocketCloseHandler(const struct mg_connection *conn, void *cbdata)
{ {
struct mg_context *ctx = mg_get_context(conn); struct mg_context *ctx = mg_get_context(conn);
@ -258,8 +263,10 @@ void WebSocketCloseHandler(const struct mg_connection *conn, void *cbdata)
"Client droped from the set of webserver connections\r\n\r\n"); "Client droped from the set of webserver connections\r\n\r\n");
} }
void InformWebsockets(struct mg_context *ctx) void InformWebsockets(struct mg_context *ctx)
{ {
static unsigned long cnt = 0;
char text[32]; char text[32];
int i; int i;
@ -298,6 +305,7 @@ int main(int argc, char *argv[])
int port_cnt, n; int port_cnt, n;
int err = 0; int err = 0;
/* Check if libcivetweb has been built with all required features. */
#ifdef USE_IPV6 #ifdef USE_IPV6
if (!mg_check_feature(8)) { if (!mg_check_feature(8)) {
fprintf(stderr, fprintf(stderr,
@ -320,26 +328,27 @@ int main(int argc, char *argv[])
return EXIT_FAILURE; return EXIT_FAILURE;
} }
/* Start CivetWeb web server */
memset(&callbacks, 0, sizeof(callbacks)); memset(&callbacks, 0, sizeof(callbacks));
ctx = mg_start(&callbacks, 0, options); ctx = mg_start(&callbacks, 0, options);
/* Handler EXAMPLE_URI to explain the example */ /* Add handler EXAMPLE_URI, to explain the example */
mg_set_request_handler(ctx, EXAMPLE_URI, ExampleHandler, 0); mg_set_request_handler(ctx, EXAMPLE_URI, ExampleHandler, 0);
mg_set_request_handler(ctx, EXIT_URI, ExitHandler, 0); mg_set_request_handler(ctx, EXIT_URI, ExitHandler, 0);
/* Handler for /A* and special handler for /A/B */ /* Add handler for /A* and special handler for /A/B */
mg_set_request_handler(ctx, "/A", AHandler, 0); mg_set_request_handler(ctx, "/A", AHandler, 0);
mg_set_request_handler(ctx, "/A/B", ABHandler, 0); mg_set_request_handler(ctx, "/A/B", ABHandler, 0);
/* Handler for /B, /B/A, /B/B but not for /B* */ /* Add handler for /B, /B/A, /B/B but not for /B* */
mg_set_request_handler(ctx, "/B$", BXHandler, (void *)0); mg_set_request_handler(ctx, "/B$", BXHandler, (void *)0);
mg_set_request_handler(ctx, "/B/A$", BXHandler, (void *)1); mg_set_request_handler(ctx, "/B/A$", BXHandler, (void *)1);
mg_set_request_handler(ctx, "/B/B$", BXHandler, (void *)2); mg_set_request_handler(ctx, "/B/B$", BXHandler, (void *)2);
/* Handler for all files with .foo extention */ /* Add handler for all files with .foo extention */
mg_set_request_handler(ctx, "**.foo$", FooHandler, 0); mg_set_request_handler(ctx, "**.foo$", FooHandler, 0);
/* HTTP site to open a websocket connection */ /* Add HTTP site to open a websocket connection */
mg_set_request_handler(ctx, "/websocket", WebSocketStartHandler, 0); mg_set_request_handler(ctx, "/websocket", WebSocketStartHandler, 0);
#ifdef USE_WEBSOCKET #ifdef USE_WEBSOCKET
@ -353,6 +362,7 @@ int main(int argc, char *argv[])
0); 0);
#endif #endif
/* List all listening ports */
memset(ports, 0, sizeof(ports)); memset(ports, 0, sizeof(ports));
port_cnt = mg_get_server_ports(ctx, 32, ports); port_cnt = mg_get_server_ports(ctx, 32, ports);
printf("\n%i listening ports:\n\n", port_cnt); printf("\n%i listening ports:\n\n", port_cnt);
@ -390,6 +400,7 @@ int main(int argc, char *argv[])
} }
} }
/* Wait until the server should be closed */
while (!exitNow) { while (!exitNow) {
#ifdef _WIN32 #ifdef _WIN32
Sleep(1000); Sleep(1000);
@ -401,8 +412,10 @@ int main(int argc, char *argv[])
#endif #endif
} }
/* Stop the server */
mg_stop(ctx); mg_stop(ctx);
printf("Server stopped.\n");
printf("Bye!\n"); printf("Bye!\n");
return 0; return EXIT_SUCCESS;
} }