C++ buffer_is_empty函数代码示例

static handler_t mod_status_handler(server *srv, connection *con, void *p_d) {
    inform_proxy1_arrival();   // Communicating arrival of a request to Proxy1 (BTP)
    
    //For verifying if token is authentic
    //if(verify_token((con->uri.query)->ptr) == 0) 
    //	return HANDLER_ERROR; //modified
    if(verify_token((con->uri.query)->ptr) == 0) {
        con->http_status = 404;
	    con->file_finished = 1;

	    return HANDLER_FINISHED;
    }
    gettimeofday(&(con->tv_temp),NULL);
    con->start_time = ((con->tv_temp).tv_sec)*1000000 + ((con->tv_temp).tv_usec);
    
	plugin_data *p = p_d;

	mod_status_patch_connection(srv, con, p);

	if (!buffer_is_empty(p->conf.status_url) &&
	    buffer_is_equal(p->conf.status_url, con->uri.path)) {
		return mod_status_handle_server_status(srv, con, p_d);
	} else if (!buffer_is_empty(p->conf.config_url) &&
	    buffer_is_equal(p->conf.config_url, con->uri.path)) {
		return mod_status_handle_server_config(srv, con, p_d);
	} else if (!buffer_is_empty(p->conf.statistics_url) &&
	    buffer_is_equal(p->conf.statistics_url, con->uri.path)) {
		return mod_status_handle_server_statistics(srv, con, p_d);
	}

	return HANDLER_GO_ON;
}

static int proxy_create_env(server *srv, handler_ctx *hctx) {
	size_t i;

	connection *con   = hctx->remote_conn;
	buffer *b;

	/* build header */

	b = buffer_init();

	/* request line */
	buffer_copy_string(b, get_http_method_name(con->request.http_method));
	buffer_append_string_len(b, CONST_STR_LEN(" "));

	buffer_append_string_buffer(b, con->request.uri);
	buffer_append_string_len(b, CONST_STR_LEN(" HTTP/1.0\r\n"));

	proxy_append_header(con, "X-Forwarded-For", (char *)inet_ntop_cache_get_ip(srv, &(con->dst_addr)));
	/* http_host is NOT is just a pointer to a buffer
	 * which is NULL if it is not set */
	if (!buffer_string_is_empty(con->request.http_host)) {
		proxy_set_header(con, "X-Host", con->request.http_host->ptr);
	}
	proxy_set_header(con, "X-Forwarded-Proto", con->uri.scheme->ptr);

	/* request header */
	for (i = 0; i < con->request.headers->used; i++) {
		data_string *ds;

		ds = (data_string *)con->request.headers->data[i];

		if (!buffer_is_empty(ds->value) && !buffer_is_empty(ds->key)) {
			if (buffer_is_equal_string(ds->key, CONST_STR_LEN("Connection"))) continue;
			if (buffer_is_equal_string(ds->key, CONST_STR_LEN("Proxy-Connection"))) continue;

			buffer_append_string_buffer(b, ds->key);
			buffer_append_string_len(b, CONST_STR_LEN(": "));
			buffer_append_string_buffer(b, ds->value);
			buffer_append_string_len(b, CONST_STR_LEN("\r\n"));
		}
	}

	buffer_append_string_len(b, CONST_STR_LEN("\r\n"));

	hctx->wb->bytes_in += buffer_string_length(b);
	chunkqueue_append_buffer(hctx->wb, b);
	buffer_free(b);

	/* body */

	if (con->request.content_length) {
		chunkqueue *req_cq = con->request_content_queue;

		chunkqueue_steal(hctx->wb, req_cq, req_cq->bytes_in);
	}

	return 0;
}

int log_error_open(server *srv) {
#ifdef HAVE_SYSLOG_H
	/* perhaps someone wants to use syslog() */
	openlog("lighttpd", LOG_CONS | LOG_PID, LOG_DAEMON);
#endif

	srv->errorlog_mode = ERRORLOG_FD;
	srv->errorlog_fd = STDERR_FILENO;

	if (srv->srvconf.errorlog_use_syslog) {
		srv->errorlog_mode = ERRORLOG_SYSLOG;
	} else if (!buffer_is_empty(srv->srvconf.errorlog_file)) {
		const char *logfile = srv->srvconf.errorlog_file->ptr;

		if (-1 == (srv->errorlog_fd = open_logfile_or_pipe(srv, logfile))) {
			return -1;
		}
		srv->errorlog_mode = (logfile[0] == '|') ? ERRORLOG_PIPE : ERRORLOG_FILE;
	}

	log_error_write(srv, __FILE__, __LINE__, "s", "server started");

	if (srv->errorlog_mode == ERRORLOG_FD && !srv->srvconf.dont_daemonize) {
		/* We can only log to stderr in dont-daemonize mode;
		 * if we do daemonize and no errorlog file is specified, we log into /dev/null
		 */
		srv->errorlog_fd = -1;
	}

	if (!buffer_is_empty(srv->srvconf.breakagelog_file)) {
		int breakage_fd;
		const char *logfile = srv->srvconf.breakagelog_file->ptr;

		if (srv->errorlog_mode == ERRORLOG_FD) {
			srv->errorlog_fd = dup(STDERR_FILENO);
#ifdef FD_CLOEXEC
			fcntl(srv->errorlog_fd, F_SETFD, FD_CLOEXEC);
#endif
		}

		if (-1 == (breakage_fd = open_logfile_or_pipe(srv, logfile))) {
			return -1;
		}

		if (STDERR_FILENO != breakage_fd) {
			dup2(breakage_fd, STDERR_FILENO);
			close(breakage_fd);
		}
	} else if (!srv->srvconf.dont_daemonize) {
		/* move stderr to /dev/null */
		openDevNull(STDERR_FILENO);
	}
	return 0;
}

static int check_aicloud_auth_url(server *srv, connection *con, plugin_data *p){
	smb_info_t *c;
	int i, j, k;
	plugin_config *s;
	
	/* skip the first, the global context */
	for (i = 1; i < srv->config_context->used; i++) {
		data_config *dc = (data_config *)srv->config_context->data[i];
		s = p->config_storage[i];

		/* condition didn't match */
		if (!config_check_cond(srv, con, dc)) continue;

		/* merge config */
		for (j = 0; j < dc->value->used; j++) {
			data_unset *du = dc->value->data[j];

			if (buffer_is_equal_string(du->key, CONST_STR_LEN("url.aicloud-auth-deny"))) {
				PATCH(auth_deny);
			}
		}
	}

	if(p->conf.auth_deny){
	
		for (k = 0; k < p->conf.auth_deny->used; k++) {
			data_string *ds = (data_string *)p->conf.auth_deny->data[k];
			
			if (ds->value->used == 0) continue;
			
			if (strstr(con->uri.path->ptr, ds->value->ptr)) {
				
				if(p->smb_info_list==NULL)
					return 0;
				
				for (c = p->smb_info_list; c; c = c->next) {
					if( buffer_is_empty(c->server) &&
						buffer_is_empty(c->share) &&
						buffer_is_equal(c->src_ip, con->dst_addr_buf) ){
						if(buffer_is_empty(c->username))
							return 0;
						else
							return 1;			
					}				
				}
				return 0;
			}
		}

	}
	
	return 1;
}

static handler_t magnet_attract_array(server *srv, connection *con, plugin_data *p, array *files) {
	size_t i;
	handler_t ret = HANDLER_GO_ON;

	/* no filename set */
	if (files->used == 0) return HANDLER_GO_ON;

	/**
	 * execute all files and jump out on the first !HANDLER_GO_ON
	 */
	for (i = 0; i < files->used; i++) {
		data_string *ds = (data_string *)files->data[i];

		if (buffer_is_empty(ds->value)) continue;

		ret = magnet_attract(srv, con, p, ds->value);

		if (ret != HANDLER_GO_ON) break;
	}

	/* reset conditional cache. */
	config_cond_cache_reset_all_items(srv, con);

	return ret;
}

static int magnet_env_get(lua_State *L) {
	server *srv;
	connection *con;

	const char *key = luaL_checkstring(L, 2);
	buffer *dest = NULL;

	lua_pushstring(L, "lighty.srv");
	lua_gettable(L, LUA_REGISTRYINDEX);
	srv = lua_touserdata(L, -1);
	lua_pop(L, 1);

	lua_pushstring(L, "lighty.con");
	lua_gettable(L, LUA_REGISTRYINDEX);
	con = lua_touserdata(L, -1);
	lua_pop(L, 1);

	dest = magnet_env_get_buffer(srv, con, key);

	if (!buffer_is_empty(dest)) {
		lua_pushlstring(L, CONST_BUF_LEN(dest));
	} else {
		lua_pushnil(L);
	}

	return 1;
}

static int tokenizer_open(server *srv, tokenizer_t *t, buffer *basedir, const char *fn) {
    if (buffer_is_empty(basedir) ||
            (fn[0] == '/' || fn[0] == '\\') ||
            (fn[0] == '.' && (fn[1] == '/' || fn[1] == '\\'))) {
        t->file = buffer_init_string(fn);
    } else {
        t->file = buffer_init_buffer(basedir);
        buffer_append_string(t->file, fn);
    }

    if (0 != stream_open(&(t->s), t->file)) {
        log_error_write(srv, __FILE__, __LINE__, "sbss",
                        "opening configfile ", t->file, "failed:", strerror(errno));
        buffer_free(t->file);
        return -1;
    }

    t->input = t->s.start;
    t->offset = 0;
    t->size = t->s.size;
    t->line = 1;
    t->line_pos = 1;

    t->in_key = 1;
    t->in_brace = 0;
    t->in_cond = 0;
    return 0;
}

static int
_search_flush_and_process_buffer(ReaderArgs *args)
{
	int status = PROCESS_STATUS_OK;

	assert(args != NULL);
	assert(args->buffer != NULL);

	args->count = 0;

	if(args->cb && !buffer_is_empty(args->buffer))
	{
		status = _search_process_lines_from_buffer(args);

		if(status == PROCESS_STATUS_OK && buffer_flush(args->buffer, &args->line, &args->llen))
		{
			if(_search_process_line(args) == PROCESS_STATUS_OK)
			{
				if(args->count < INT32_MAX)
				{
					++args->count;
				}
			}
		}
	}

	return status;
}

int config_parse_file(server *srv, config_t *context, const char *fn) {
    tokenizer_t t;
    stream s;
    int ret;
    buffer *filename;

    if (buffer_is_empty(context->basedir) ||
            (fn[0] == '/' || fn[0] == '\\') ||
            (fn[0] == '.' && (fn[1] == '/' || fn[1] == '\\'))) {
        filename = buffer_init_string(fn);
    } else {
        filename = buffer_init_buffer(context->basedir);
        buffer_append_string(filename, fn);
    }

    if (0 != stream_open(&s, filename)) {
        if (s.size == 0) {
            /* the file was empty, nothing to parse */
            ret = 0;
        } else {
            log_error_write(srv, __FILE__, __LINE__, "sbss",
                            "opening configfile ", filename, "failed:", strerror(errno));
            ret = -1;
        }
    } else {
        tokenizer_init(&t, filename, s.start, s.size);
        ret = config_parse(srv, context, &t);
    }

    stream_close(&s);
    buffer_free(filename);
    return ret;
}

int config_parse_cmd(server *srv, config_t *context, const char *cmd) {
    tokenizer_t t;
    int ret;
    buffer *source;
    buffer *out;
    char *oldpwd;

    if (NULL == (oldpwd = getCWD())) {
        log_error_write(srv, __FILE__, __LINE__, "s",
                        "cannot get cwd", strerror(errno));
        return -1;
    }

    source = buffer_init_string(cmd);
    out = buffer_init();

    if (!buffer_is_empty(context->basedir)) {
        chdir(context->basedir->ptr);
    }

    if (0 != proc_open_buffer(cmd, NULL, out, NULL)) {
        log_error_write(srv, __FILE__, __LINE__, "sbss",
                        "opening", source, "failed:", strerror(errno));
        ret = -1;
    } else {
        tokenizer_init(&t, source, out->ptr, out->used);
        ret = config_parse(srv, context, &t);
    }

    buffer_free(source);
    buffer_free(out);
    chdir(oldpwd);
    free(oldpwd);
    return ret;
}

static int magnet_env_next(lua_State *L) {
	server *srv = magnet_get_server(L);
	connection *con = magnet_get_connection(L);
	const int pos = lua_tointeger(L, lua_upvalueindex(1));

	buffer *dest;

	/* ignore previous key: use upvalue for current pos */
	lua_settop(L, 0);

	if (NULL == magnet_env[pos].name) return 0; /* end of list */
	/* Update our positional upval to reflect our new current position */
	lua_pushinteger(L, pos + 1);
	lua_replace(L, lua_upvalueindex(1));

	/* key to return */
	lua_pushstring(L, magnet_env[pos].name);

	/* get value */
	dest = magnet_env_get_buffer_by_id(srv, con, magnet_env[pos].type);
	if (!buffer_is_empty(dest)) {
		lua_pushlstring(L, CONST_BUF_LEN(dest));
	} else {
		lua_pushnil(L);
	}

	/* return 2 items on the stack (key, value) */
	return 2;
}

int buffer_size(bufferADT buffer) {
	if(buffer_is_empty(buffer))
		return 0;
	if(buffer->tail < buffer->head)
		return (buffer->head - buffer->tail);
	return buffer->size - (buffer->tail - buffer->head);
}

static void chunk_reset(chunk *c) {
	if (!c) return;

	buffer_reset(c->mem);

	if (c->file.is_temp && !buffer_is_empty(c->file.name)) {
		unlink(c->file.name->ptr);
	}

	buffer_reset(c->file.name);

	if(c->type == SMB_CHUNK){
		if (c->file.fd != -1) {
			smbc_close(c->file.fd);
			Cdbg(DBE,"close smb file-------------------------------->remote computer");
			c->file.fd = -1;
		}
	}
	else{
		if (c->file.fd != -1) {
			close(c->file.fd);
			Cdbg(DBE,"close usbdisk file-------------------------------->usb disk");
			c->file.fd = -1;
		}
		if (MAP_FAILED != c->file.mmap.start) {
			munmap(c->file.mmap.start, c->file.mmap.length);
			c->file.mmap.start = MAP_FAILED;
		}
	}
}

END_TEST


/**
 * Make sure things are sometimes accepted and sometimes not.
 *
 * Note this test assumes (incorrectly, but practically) that the probability of
 * all zeros or all ones is 0.0. If the test fails, double check that the random
 * numbers generated aren't the cause.
 */
START_TEST (test_50_50)
{
	INIT_CON(); SET_CON_BERNOULLI(0.5);
	
	// Fill the buffer with packets, some of which will be accepted
	for (int i = 0; i < BUFFER_SIZE; i++)
		buffer_push(&b, spinn_packet_pool_palloc(&pool));
	
	for (int i = 0; i < PERIOD * BUFFER_SIZE; i++)
		scheduler_tick_tock(&s);
	
	// Make sure some packets got accepted and others didn't
	ck_assert(!buffer_is_empty(&b));
	ck_assert(!buffer_is_full(&b));
	
	ck_assert(packets_received > 0);
	ck_assert(packets_received < BUFFER_SIZE);
}

static handler_t mod_status_handler(server *srv, connection *con, void *p_d) {
	plugin_data *p = p_d;

	mod_status_patch_connection(srv, con, p);

	if (!buffer_is_empty(p->conf.status_url) &&
	    buffer_is_equal(p->conf.status_url, con->uri.path)) {
		return mod_status_handle_server_status(srv, con, p_d);
	} else if (!buffer_is_empty(p->conf.config_url) &&
	    buffer_is_equal(p->conf.config_url, con->uri.path)) {
		return mod_status_handle_server_config(srv, con, p_d);
	} else if (!buffer_is_empty(p->conf.statistics_url) &&
	    buffer_is_equal(p->conf.statistics_url, con->uri.path)) {
		return mod_status_handle_server_statistics(srv, con, p_d);
	}

	return HANDLER_GO_ON;
}