protocol.cpp

《jsp编程起步》里面的所有源代码

				return -1;
		}

		sublen = s->read_length - s->read_offset;
		if (len < sublen)
			sublen = len;

		s->read_buf[s->read_length] = 0;
		unsigned long writelen = sublen;
		while (writelen > 0) {
			unsigned long sentlen = writelen;

			if (! r->WriteClient(r->ConnID, s->read_buf + s->read_offset, &sentlen, HSE_IO_SYNC) || 
				sentlen <= 0) {
				cse_close(s, "response");
				return -1;
			}

			writelen -= sentlen;
		}
		s->read_offset += sublen;
		len -= sublen;
	}

	return 1;
}

static int
cse_copy_results(stream_t *s, EXTENSION_CONTROL_BLOCK *r, config_t *config)
{
	char headers[32 * 1024];
	char status[8192];
	char *status_ptr = status;
	char key[8192];
	char value[8192];
	int code;

	headers[0] = 0;
	do {
		int i;
		int l1, l2, l3;
		int read_len;
		unsigned long size;

		code = cse_read_byte(s);
		l1 = cse_read_byte(s) & 0xff;
		l2 = cse_read_byte(s) & 0xff;
		l3 = cse_read_byte(s);
		read_len = (l1 << 16) + (l2 << 8) + (l3 & 0xff);

		if (l3 < 0 || s->socket < 0)
			return -1;

		LOG(("code %c(%d) %d\n", code, code, read_len));

		switch (code) {
		case CSE_DATA:
			if (cse_write_response(s, read_len, r) < 0)
				code = -1;
			break;

		case CSE_STATUS:
                        cse_read_limit(s, status, sizeof(status), read_len);

			for (i = 0; status[i] && status[i] != ' '; i++) {
			}
			i++;

			status_ptr = status + i;
			break;

		case CSE_HEADER:
			cse_read_limit(s, key, sizeof(key), read_len);
			cse_read_string(s, value, sizeof(value));
			strcat(headers, key);
			strcat(headers, ": ");
			strcat(headers, value);
			strcat(headers, "\r\n");
			break;

		case CSE_SEND_HEADER:
			strcat(headers, "\r\n");
			size = strlen(headers);
			r->ServerSupportFunction(r->ConnID, HSE_REQ_SEND_RESPONSE_HEADER, status_ptr, &size, (unsigned long *) headers);
			break;

		default:
			if (code < 0 || read_len < 0 || read_len > 8192) {
				code = -1;
				break;
			}

			cse_skip(s, read_len);
			break;
		}
	} while (code > 0 && code != CSE_END && code != CSE_ACK && code != CSE_CLOSE);

	return code;
}

static void
cse_get_ip(EXTENSION_CONTROL_BLOCK *r, char *ip, unsigned long length)
{
	ip[0] = 0;
	if (r->GetServerVariable(r->ConnID, "REMOTE_ADDR", ip, &length) && length >= 0)
		ip[length] = 0;
	else
		ip[0] = 0;
}

static int
get_session_index(EXTENSION_CONTROL_BLOCK *r)
{
	char buf[16384];
	unsigned long i = 0;
	unsigned long len = sizeof(buf);
	int session;

	if (r->GetServerVariable(r->ConnID, "Cookie", buf, &len)) {
	    session = cse_session_from_string(buf, "JSESSIONID=");
      	if (session >= 0)
			return session;
	}

	// raw?

	len = sizeof(buf);

	buf[0] = 0;
	if (! r->GetServerVariable(r->ConnID, "PATH_INFO", buf, &len))
		return -1;
	
	buf[len] = 0;
	return cse_session_from_string(buf, "jsessionid=");
}

static int
get_session_from_raw(EXTENSION_CONTROL_BLOCK *r)
{
	char buf[16384];
	unsigned long i = 0;
	unsigned long len = sizeof(buf);
	int session;

	if (! r->GetServerVariable(r->ConnID, "ALL_RAW", buf, &len))
		return -1;

	while (i < len) {
		int head = i + 5;
		int tail;
		i = head;
		for (; i < len && buf[i] != ':'; i++) {
		}
		tail = i;

		for (i++; i < len && buf[i] != '\r' && buf[i] != '\n'; i++) {
		}

		if (head >= tail)
			continue;

		buf[tail] = 0;
		buf[i] = 0;

		if (stricmp(buf + head, "cookie"))
			continue;

	    session = cse_session_from_string(buf + tail + 1, "JSESSIONID=");
		if (session >= 0)
			return session;
	}

	return -1;
}

static int
write_request(stream_t *s, EXTENSION_CONTROL_BLOCK *r, config_t *config)
{
	int code;
	char ip[1024];
	int session_index = get_session_index(r);
	int rand = 0;

	DWORD request_time = GetTickCount() / 1000;

	cse_get_ip(r, ip, sizeof(ip));
	if (! cse_open_connection(s, config, session_index, ip,
				  request_time, rand, 0))
		return connection_error(config, r);

	int isHttp11 = write_env(s, r);
	write_headers(s, r);

	// read post data
	char buf[BUF_LENGTH];
	int isFirst = 1;
	unsigned long totalLen = 0;
		
	while (totalLen < r->cbTotalBytes) {
		unsigned long len = sizeof(buf);

		if (r->cbAvailable > 0) {
			if (len > r->cbAvailable)
				len = r->cbAvailable;
			memcpy(buf, r->lpbData + totalLen, len);
			r->cbAvailable -= len;
		}
		else if (! r->ReadClient(r->ConnID, buf, &len) || len <= 0) {
			break;
		}

		totalLen += len;

		if (! isFirst) {
			code = cse_copy_results(s, r, config);

			if (code < 0 || code == CSE_END || code == CSE_CLOSE)
				break;
		}

		cse_write_packet(s, CSE_DATA, buf, len);
		isFirst = 0;
	}	

	cse_write_packet(s, CSE_END, 0, 0);

	code = cse_copy_results(s, r, config);

	if (code == CSE_END)
		cse_recycle(s);
	else
		cse_close(s, "write");

	return code == CSE_END || code == CSE_CLOSE;
}

static int g_count;

static void
jvm_status(config_t *config, EXTENSION_CONTROL_BLOCK *r)
{
  int i;
  stream_t s;

  cse_printf(r, "<center><table border=2 cellspacing=0 cellpadding=2 width=\"80%%\">\n");
  /*
  cse_printf(r, "<tr><th>Host\n");
  cse_printf(r, "    <th>Minute<br>%%cpu/thread\n");
  cse_printf(r, "    <th>Hour<br>%%cpu/thread\n");
  cse_printf(r, "    <th>Day<br>%%cpu/thread\n");
  */

  for (i = 0; i < config->srun_size; i++) {
    srun_t *srun = config->srun_list + i;
    int port = srun->port;

    cse_printf(r, "<tr>");

    if (! cse_open(&s, config, srun, 0, 1)) {
      cse_printf(r, "<td bgcolor='#ff6666'>%s:%d%s (down)</td>",
		 srun->hostname ? srun->hostname : "localhost",
		 port, srun->is_backup ? "*" : "");
    }
    else {
      cse_printf(r, "<td bgcolor='#66ff66'>%s:%d%s (ok)</td>",
		 srun->hostname ? srun->hostname : "localhost",
		 port, srun->is_backup ? "*" : "");

      cse_recycle(&s);
      continue;
    }
  }

  cse_printf(r, "</table></center>\n");
}

static void
cse_caucho_status(config_t *config, EXTENSION_CONTROL_BLOCK *r)
{
  location_t *loc;
  char *headers = "200 OK\r\nContent-Type: text/html";
  unsigned long size = strlen(headers);

  r->ServerSupportFunction(r->ConnID, HSE_REQ_SEND_RESPONSE_HEADER, headers, &size, 0);
 
  cse_printf(r, "<html><title>Status : Caucho Servlet Engine</title>\n");
  cse_printf(r, "<body bgcolor=white>\n");
  cse_printf(r, "<h1>Status : Caucho Servlet Engine</h1>\n");
  
  jvm_status(config, r);

  cse_printf(r, "<p><center><table border=2 cellspacing=0 cellpadding=2 width=\"80%%\">\n");
  cse_printf(r, "<tr><th width='50%'>Host\n");
  cse_printf(r, "    <th>url-pattern\n");
  
  loc = config ? config->locations : 0;
  for (; loc; loc = loc->next) {
    cse_printf(r, "<tr bgcolor='#ffcc66'><td>%s<td>%s%s%s%s</tr>\n", 
	       loc->host && loc->host[0] ? loc->host : "*",
	       loc->prefix,
	       ! loc->is_exact && ! loc->suffix ? "/*" : 
	       loc->suffix && loc->prefix[0] ? "/" : "",
	       loc->suffix ? "*" : "",
	       loc->suffix ? loc->suffix : "");
  }

  cse_printf(r, "</table></center>\n");
  cse_printf(r, "</body></html>\n");
}

int
cse_handle_request(config_t *config, EXTENSION_CONTROL_BLOCK *r)
{
	char url[8192];
	char *ptr = url;
	unsigned long size = sizeof(url);

	url[0] = 0;
	if (r->GetServerVariable(r->ConnID, "PATH_INFO", url, &size) && size > 0 && url[0]) {
		url[size] = 0;

		if (! strcmp(url, "/caucho-status")) {
			cse_caucho_status(config, r);
			return 1;
		}
		else if (! cse_match_request(config, "", 0, ptr))
			return cse_error(config, r);
	}
	else
		return cse_error(config, r);

	stream_t s;

	return write_request(&s, r, config);
}