| #include <stdio.h> |
| #include <stdlib.h> |
| #include <unistd.h> |
| #include <getopt.h> |
| #include <string.h> |
| |
| #include "libwebsockets.h" |
| |
| /* |
| * libwebsocket Example server Copyright 2010 Andy Green <andy@warmcat.com> |
| * |
| * Shows how to use libwebsocket |
| */ |
| |
| static int port = 7681; |
| static int ws_protocol = 76; |
| |
| /* |
| * libwebsockets needs this one callback in your server application, it's |
| * called for a handful of different reasons during the connection lifecycle. |
| * |
| * All the serving actions occur in the callback but the websocket protocol |
| * stuff is already handled by the library. |
| */ |
| |
| static int websocket_callback(struct libwebsocket * wsi, |
| enum libwebsocket_callback_reasons reason, void *in, size_t len) |
| { |
| int n; |
| char buf[LWS_SEND_BUFFER_PRE_PADDING + 512 + |
| LWS_SEND_BUFFER_POST_PADDING]; |
| static int bump; |
| char *p = &buf[LWS_SEND_BUFFER_PRE_PADDING]; |
| const char *uri; |
| |
| switch (reason) { |
| /* |
| * Websockets session handshake completed and is established |
| */ |
| case LWS_CALLBACK_ESTABLISHED: |
| fprintf(stderr, "Websocket connection established\n"); |
| break; |
| |
| /* |
| * Websockets session is closed |
| */ |
| case LWS_CALLBACK_CLOSED: |
| fprintf(stderr, "Websocket connection closed\n"); |
| break; |
| |
| /* |
| * Opportunity for us to send something on the connection |
| */ |
| case LWS_CALLBACK_SEND: |
| n = sprintf(p, "%d", bump++); |
| n = libwebsocket_write(wsi, (unsigned char *)p, n, 0); |
| if (n < 0) { |
| fprintf(stderr, "ERROR writing to socket"); |
| exit(1); |
| } |
| break; |
| /* |
| * Something has arrived for us on the connection, it's len bytes long |
| * and is available at *in |
| */ |
| case LWS_CALLBACK_RECEIVE: |
| fprintf(stderr, "Received %d bytes payload\n", (int)len); |
| break; |
| |
| /* |
| * The client has asked us for something in normal HTTP mode, |
| * not websockets mode. Normally it means we want to send |
| * our script / html to the client, and when that script runs |
| * it will start up separate websocket connections. |
| * |
| * Interpret the URI string to figure out what is needed to send |
| */ |
| |
| case LWS_CALLBACK_HTTP: |
| |
| uri = libwebsocket_get_uri(wsi); |
| if (uri && strcmp(uri, "/favicon.ico") == 0) { |
| if (libwebsockets_serve_http_file(wsi, "./favicon.ico", |
| "image/x-icon")) |
| fprintf(stderr, "Failed to send favicon\n"); |
| break; |
| } |
| |
| /* send the script... when it runs it'll start websockets */ |
| |
| if (libwebsockets_serve_http_file(wsi, "./test.html", |
| "text/html")) |
| fprintf(stderr, "Failed to send HTTP file\n"); |
| |
| break; |
| } |
| |
| return 0; |
| } |
| |
| static struct option options[] = { |
| { "help", no_argument, NULL, 'h' }, |
| { "port", required_argument, NULL, 'p' }, |
| { "protocol", required_argument, NULL, 'r' }, |
| { NULL, 0, 0, 0 } |
| }; |
| |
| int main(int argc, char **argv) |
| { |
| int n = 0; |
| |
| fprintf(stderr, "libwebsockets test server\n" |
| "Copyright 2010 Andy Green <andy@warmcat.com> " |
| "licensed under GPL2\n"); |
| |
| while (n >= 0) { |
| n = getopt_long(argc, argv, "hp:r:", options, NULL); |
| if (n < 0) |
| continue; |
| switch (n) { |
| case 'p': |
| port = atoi(optarg); |
| break; |
| case 'r': |
| ws_protocol = atoi(optarg); |
| break; |
| case 'h': |
| fprintf(stderr, "Usage: test-server " |
| "[--port=<p>] [--protocol=<v>]\n"); |
| exit(1); |
| } |
| } |
| |
| if (libwebsocket_create_server(port, websocket_callback, ws_protocol) < |
| 0) { |
| fprintf(stderr, "libwebsocket init failed\n"); |
| return -1; |
| } |
| |
| /* just sit there until killed */ |
| |
| while (1) |
| sleep(10); |
| |
| return 0; |
| } |