demo.c

#include "webby.h"

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <ctype.h>

#ifdef _WIN32
#include <winsock2.h>
#endif

#ifdef __APPLE__
#include <unistd.h>
#endif

static int quit = 0;

enum
{
  MAX_WSCONN = 8
};

static int ws_connection_count;
static struct WebbyConnection *ws_connections[MAX_WSCONN];

static void test_log(const char* text)
{
  printf("[debug] %s\n", text);
}

static int test_dispatch(struct WebbyConnection *connection)
{
  if (0 == strcmp("/foo", connection->request.uri))
  {
    WebbyBeginResponse(connection, 200, 14, NULL, 0);
    WebbyWrite(connection, "Hello, world!\n", 14);
    WebbyEndResponse(connection);
    return 0;
  }
  else if (0 == strcmp("/bar", connection->request.uri))
  {
    WebbyBeginResponse(connection, 200, -1, NULL, 0);
    WebbyWrite(connection, "Hello, world!\n", 14);
    WebbyWrite(connection, "Hello, world?\n", 14);
    WebbyEndResponse(connection);
    return 0;
  }
  else if (0 == strcmp(connection->request.uri, "/quit"))
  {
    WebbyBeginResponse(connection, 200, -1, NULL, 0);
    WebbyPrintf(connection, "Goodbye, cruel world\n");
    WebbyEndResponse(connection);
    quit = 1;
    return 0;
  }
  else
    return 1;
}

static int test_ws_connect(struct WebbyConnection *connection)
{
  /* Allow websocket upgrades on /wstest */
  if (0 == strcmp(connection->request.uri, "/wstest") && ws_connection_count < MAX_WSCONN)
    return 0;
  else
    return 1;
}

static void test_ws_connected(struct WebbyConnection *connection)
{
  printf("WebSocket connected\n");
  ws_connections[ws_connection_count++] = connection;
}

static void test_ws_closed(struct WebbyConnection *connection)
{
  int i;
  printf("WebSocket closed\n");

  for (i = 0; i < ws_connection_count; i++)
  {
    if (ws_connections[i] == connection)
    {
      int remain = ws_connection_count - i;
      memmove(ws_connections + i, ws_connections + i + 1, remain * sizeof(struct WebbyConnection *));
      --ws_connection_count;
      break;
    }
  }
}

static int test_ws_frame(struct WebbyConnection *connection, const struct WebbyWsFrame *frame)
{
  int i = 0;

  printf("WebSocket frame incoming\n");
  printf("  Frame OpCode: %d\n", frame->opcode);
  printf("  Final frame?: %s\n", (frame->flags & WEBBY_WSF_FIN) ? "yes" : "no");
  printf("  Masked?     : %s\n", (frame->flags & WEBBY_WSF_MASKED) ? "yes" : "no");
  printf("  Data Length : %d\n", (int) frame->payload_length);

  while (i < frame->payload_length)
  {
    unsigned char buffer[16];
    int remain = frame->payload_length - i;
    size_t read_size = remain > (int) sizeof buffer ? sizeof buffer : (size_t) remain;
    size_t k;

    printf("%08x ", (int) i);

    if (0 != WebbyRead(connection, buffer, read_size))
      break;

    for (k = 0; k < read_size; ++k)
      printf("%02x ", buffer[k]);

    for (k = read_size; k < 16; ++k)
      printf("   ");

    printf(" | ");

    for (k = 0; k < read_size; ++k)
      printf("%c", isprint(buffer[k]) ? buffer[k] : '?');

    printf("\n");

    i += read_size;
  }

  return 0;
}

int main(int argc, char *argv[])
{
  int i;
  int frame_counter = 0;
  void *memory;
  int memory_size;
  struct WebbyServer *server;
  struct WebbyServerConfig config;

#if defined(_WIN32)
  {
    WORD wsa_version = MAKEWORD(2, 2);
    WSADATA wsa_data;
    if (0 != WSAStartup( wsa_version, &wsa_data ))
    {
      fprintf(stderr, "WSAStartup failed\n");
      return 1;
    }
  }
#endif

  memset(&config, 0, sizeof config);
  config.bind_address = "127.0.0.1";
  config.listening_port = 8081;
  config.flags = WEBBY_SERVER_WEBSOCKETS;
  config.connection_max = 4;
  config.request_buffer_size = 2048;
  config.io_buffer_size = 8192;
  config.dispatch = &test_dispatch;
  config.log = &test_log;
  config.ws_connect = &test_ws_connect;
  config.ws_connected = &test_ws_connected;
  config.ws_closed = &test_ws_closed;
  config.ws_frame = &test_ws_frame;

  for (i = 1; i < argc; )
  {
    if (0 == strcmp(argv[i], "-p"))
    {
      config.listening_port = (unsigned short) atoi(argv[i + 1]);
      i += 2;
    }
    else if (0 == strcmp(argv[i], "-b"))
    {
      config.bind_address = argv[i + 1];
      i += 2;
    }
    else if (0 == strcmp(argv[i], "-d"))
    {
      config.flags |= WEBBY_SERVER_LOG_DEBUG;
      i += 1;
    }
    else
      ++i;
  }

  memory_size = WebbyServerMemoryNeeded(&config);
  memory = malloc(memory_size);
  server = WebbyServerInit(&config, memory, memory_size);

  if (!server)
  {
    fprintf(stderr, "failed to init server\n");
    return 1;
  }

  frame_counter = 0;

  while (!quit)
  {
    WebbyServerUpdate(server);

    /* Push some test data over websockets */
    if (0 == (frame_counter & 0x7f))
    {
      for (i = 0; i < ws_connection_count; ++i)
      {
        WebbyBeginSocketFrame(ws_connections[i], WEBBY_WS_OP_TEXT_FRAME);
        WebbyPrintf(ws_connections[i], "Hello world over websockets!\n");
        WebbyEndSocketFrame(ws_connections[i]);
      }
    }
#if defined(__APPLE__)
    usleep(30 * 1000);
#elif defined(_WIN32)
    Sleep(30);
#endif

    ++frame_counter;
  }

  WebbyServerShutdown(server);
  free(memory);

#if defined(_WIN32)
  WSACleanup();
#endif

  return 0;
}