func (h *handler) handleChanges() error {
// http://wiki.apache.org/couchdb/HTTP_database_API#Changes
var options db.ChangesOptions
options.Since = h.getIntQuery("since", 0)
options.Limit = int(h.getIntQuery("limit", 0))
options.Conflicts = (h.getQuery("style") == "all_docs")
options.IncludeDocs = (h.getBoolQuery("include_docs"))
// Get the channels as parameters to an imaginary "bychannel" filter.
// The default is all channels the user can access.
userChannels := h.user.Channels
filter := h.getQuery("filter")
if filter != "" {
if filter != "sync_gateway/bychannel" {
return &base.HTTPError{http.StatusBadRequest, "Unknown filter; try sync_gateway/bychannel"}
}
channelsParam := h.getQuery("channels")
if channelsParam == "" {
return &base.HTTPError{http.StatusBadRequest, "Missing 'channels' filter parameter"}
}
userChannels = channels.SimplifyChannels(strings.Split(channelsParam, ","), true)
userChannels = h.user.ExpandWildCardChannel(userChannels)
if err := h.user.AuthorizeAllChannels(userChannels); err != nil {
return err
}
}
switch h.getQuery("feed") {
case "continuous":
return h.handleContinuousChanges(userChannels, options)
case "longpoll":
options.Wait = true
}
return h.handleSimpleChanges(userChannels, options)
}
// Top-level handler for _changes feed 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
var options db.ChangesOptions
options.Since = channels.TimedSetFromString(h.getQuery("since"))
options.Limit = int(h.getIntQuery("limit", 0))
options.Conflicts = (h.getQuery("style") == "all_docs")
options.IncludeDocs = (h.getBoolQuery("include_docs"))
options.Terminator = make(chan bool)
defer close(options.Terminator)
// Get the channels as parameters to an imaginary "bychannel" filter.
// The default is all channels the user can access.
userChannels := channels.SetOf("*")
filter := h.getQuery("filter")
if filter != "" {
if filter != "sync_gateway/bychannel" {
return base.HTTPErrorf(http.StatusBadRequest, "Unknown filter; try sync_gateway/bychannel")
}
channelsParam := h.getQuery("channels")
if channelsParam == "" {
return base.HTTPErrorf(http.StatusBadRequest, "Missing 'channels' filter parameter")
}
var err error
userChannels, err = channels.SetFromArray(strings.Split(channelsParam, ","),
channels.ExpandStar)
if err != nil {
return err
}
if len(userChannels) == 0 {
return base.HTTPErrorf(http.StatusBadRequest, "Empty channel list")
}
}
h.db.ChangesClientStats.Increment()
defer h.db.ChangesClientStats.Decrement()
switch h.getQuery("feed") {
case "normal", "":
return h.sendSimpleChanges(userChannels, options)
case "longpoll":
options.Wait = true
return h.sendSimpleChanges(userChannels, options)
case "continuous":
return h.sendContinuousChangesByHTTP(userChannels, options)
case "websocket":
return h.sendContinuousChangesByWebSocket(userChannels, options)
default:
return base.HTTPErrorf(http.StatusBadRequest, "Unknown feed type")
}
}
func (h *handler) handleChanges() error {
// http://wiki.apache.org/couchdb/HTTP_database_API#Changes
var options db.ChangesOptions
options.Since = channels.TimedSetFromString(h.getQuery("since"))
options.Limit = int(h.getIntQuery("limit", 0))
options.Conflicts = (h.getQuery("style") == "all_docs")
options.IncludeDocs = (h.getBoolQuery("include_docs"))
// Get the channels as parameters to an imaginary "bychannel" filter.
// The default is all channels the user can access.
userChannels := channels.SetOf("*")
filter := h.getQuery("filter")
if filter != "" {
if filter != "sync_gateway/bychannel" {
return &base.HTTPError{http.StatusBadRequest, "Unknown filter; try sync_gateway/bychannel"}
}
channelsParam := h.getQuery("channels")
if channelsParam == "" {
return &base.HTTPError{http.StatusBadRequest, "Missing 'channels' filter parameter"}
}
var err error
userChannels, err = channels.SetFromArray(strings.Split(channelsParam, ","),
channels.ExpandStar)
if err != nil {
return err
}
if len(userChannels) == 0 {
return &base.HTTPError{http.StatusBadRequest, "Empty channel list"}
}
}
switch h.getQuery("feed") {
case "continuous":
return h.handleContinuousChanges(userChannels, options)
case "longpoll":
options.Wait = true
}
return h.handleSimpleChanges(userChannels, options)
}
// 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
if h.rq.Method == "GET" {
// GET request has parameters in URL:
feed = h.getQuery("feed")
options.Since = channels.TimedSetFromString(h.getQuery("since"))
options.Limit = int(h.getIntQuery("limit", 0))
options.Conflicts = (h.getQuery("style") == "all_docs")
options.IncludeDocs = (h.getBoolQuery("include_docs"))
filter = h.getQuery("filter")
channelsParam := h.getQuery("channels")
if channelsParam != "" {
channelsArray = strings.Split(channelsParam, ",")
}
} else {
// POST request has parameters in JSON body:
body, err := h.readBody()
if err != nil {
return err
}
feed, options, filter, channelsArray, err = 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("*")
if filter != "" {
if filter != "sync_gateway/bychannel" {
return base.HTTPErrorf(http.StatusBadRequest, "Unknown filter; try 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")
}
}
h.db.ChangesClientStats.Increment()
defer h.db.ChangesClientStats.Decrement()
options.Terminator = make(chan bool)
defer close(options.Terminator)
switch feed {
case "normal", "":
return h.sendSimpleChanges(userChannels, options)
case "longpoll":
options.Wait = true
return h.sendSimpleChanges(userChannels, options)
case "continuous":
return h.sendContinuousChangesByHTTP(userChannels, options)
case "websocket":
return h.sendContinuousChangesByWebSocket(userChannels, options)
default:
return base.HTTPErrorf(http.StatusBadRequest, "Unknown feed type")
}
}
