Golang ChangesOptions.ActiveOnly方法代碼示例

// Top-level handler for _changes feed requests. Accepts GET or POST requests.
func (h *handler) handleChanges() error {
	// http://wiki.apache.org/couchdb/HTTP_database_API#Changes
	// http://docs.couchdb.org/en/latest/api/database/changes.html
	restExpvars.Add("changesFeeds_total", 1)
	restExpvars.Add("changesFeeds_active", 1)
	defer restExpvars.Add("changesFeeds_active", -1)

	var feed string
	var options db.ChangesOptions
	var filter string
	var channelsArray []string
	var docIdsArray []string

	if h.rq.Method == "GET" {
		// GET request has parameters in URL:
		feed = h.getQuery("feed")
		var err error
		if options.Since, err = h.db.ParseSequenceID(h.getJSONStringQuery("since")); err != nil {
			return err
		}
		options.Limit = int(h.getIntQuery("limit", 0))
		options.Conflicts = (h.getQuery("style") == "all_docs")
		options.ActiveOnly = h.getBoolQuery("active_only")
		options.IncludeDocs = (h.getBoolQuery("include_docs"))
		filter = h.getQuery("filter")
		channelsParam := h.getQuery("channels")
		if channelsParam != "" {
			channelsArray = strings.Split(channelsParam, ",")
		}

		docidsParam := h.getQuery("doc_ids")
		if docidsParam != "" {
			var docidKeys []string
			err := json.Unmarshal([]byte(docidsParam), &docidKeys)
			if err != nil {
				err = base.HTTPErrorf(http.StatusBadRequest, "Bad doc id's")
			}
			if len(docidKeys) > 0 {
				docIdsArray = docidKeys
			}
		}

		options.HeartbeatMs = getRestrictedIntQuery(
			h.rq.URL.Query(),
			"heartbeat",
			kDefaultHeartbeatMS,
			kMinHeartbeatMS,
			h.server.config.MaxHeartbeat*1000,
			true,
		)
		options.TimeoutMs = getRestrictedIntQuery(
			h.rq.URL.Query(),
			"timeout",
			kDefaultTimeoutMS,
			0,
			kMaxTimeoutMS,
			true,
		)

	} else {
		// POST request has parameters in JSON body:
		body, err := h.readBody()
		if err != nil {
			return err
		}
		feed, options, filter, channelsArray, docIdsArray, _, err = h.readChangesOptionsFromJSON(body)
		if err != nil {
			return err
		}
	}

	// Get the channels as parameters to an imaginary "bychannel" filter.
	// The default is all channels the user can access.
	userChannels := channels.SetOf(channels.AllChannelWildcard)
	if filter != "" {
		if filter == "sync_gateway/bychannel" {
			if channelsArray == nil {
				return base.HTTPErrorf(http.StatusBadRequest, "Missing 'channels' filter parameter")
			}
			var err error
			userChannels, err = channels.SetFromArray(channelsArray, channels.ExpandStar)
			if err != nil {
				return err
			}
			if len(userChannels) == 0 {
				return base.HTTPErrorf(http.StatusBadRequest, "Empty channel list")
			}
		} else if filter == "_doc_ids" {
			if docIdsArray == nil {
				return base.HTTPErrorf(http.StatusBadRequest, "Missing 'doc_ids' filter parameter")
			}
			if len(docIdsArray) == 0 {
				return base.HTTPErrorf(http.StatusBadRequest, "Empty doc_ids list")
			}
		} else {
			return base.HTTPErrorf(http.StatusBadRequest, "Unknown filter; try sync_gateway/bychannel or _doc_ids")
		}
	}

//.........這裏部分代碼省略.........

func (h *handler) updateChangesOptionsFromQuery(feed *string, options *db.ChangesOptions, filter *string, channelsArray []string, docIdsArray []string) (newChannelsArray []string, newDocIdsArray []string, err error) {

	if h.rq.URL.RawQuery == "" {
		return channelsArray, docIdsArray, nil
	}

	values := h.rq.URL.Query()

	if _, ok := values["feed"]; ok {
		*feed = h.getQuery("feed")
	}

	if _, ok := values["since"]; ok {
		if options.Since, err = h.db.ParseSequenceID(h.getJSONStringQuery("since")); err != nil {
			return nil, nil, err
		}
	}

	if _, ok := values["limit"]; ok {
		options.Limit = int(h.getIntQuery("limit", 0))
	}

	if _, ok := values["style"]; ok {
		options.Conflicts = (h.getQuery("style") == "all_docs")
	}

	if _, ok := values["active_only"]; ok {
		options.ActiveOnly = h.getBoolQuery("active_only")
	}

	if _, ok := values["include_docs"]; ok {
		options.IncludeDocs = (h.getBoolQuery("include_docs"))
	}

	if _, ok := values["filter"]; ok {
		*filter = h.getQuery("filter")
	}

	if _, ok := values["channels"]; ok {
		channelsParam := h.getQuery("channels")
		if channelsParam != "" {
			channelsArray = strings.Split(channelsParam, ",")
		}
	}

	if _, ok := values["doc_ids"]; ok {
		docidsParam := h.getQuery("doc_ids")
		if docidsParam != "" {
			var querydocidKeys []string
			err := json.Unmarshal([]byte(docidsParam), &querydocidKeys)
			if err == nil {
				if len(querydocidKeys) > 0 {
					docIdsArray = querydocidKeys
				}
			} else {
				//This is not a JSON array so treat as a simple
				//comma separated list of doc id's
				docIdsArray = strings.Split(docidsParam, ",")
			}
		}
	}

	if _, ok := values["heartbeat"]; ok {
		options.HeartbeatMs = getRestrictedIntQuery(
			h.rq.URL.Query(),
			"heartbeat",
			kDefaultHeartbeatMS,
			kMinHeartbeatMS,
			h.server.config.MaxHeartbeat*1000,
			true,
		)
	}

	if _, ok := values["timeout"]; ok {
		options.TimeoutMs = getRestrictedIntQuery(
			h.rq.URL.Query(),
			"timeout",
			kDefaultTimeoutMS,
			0,
			kMaxTimeoutMS,
			true,
		)
	}
	return channelsArray, docIdsArray, nil
}