// Cleans up the Value property, and removes rows that aren't visible to the current user
func filterViewResult(input walrus.ViewResult, user auth.User) (result walrus.ViewResult) {
checkChannels := false
var visibleChannels ch.TimedSet
if user != nil {
visibleChannels = user.InheritedChannels()
checkChannels = !visibleChannels.Contains("*")
}
result.TotalRows = input.TotalRows
result.Rows = make([]*walrus.ViewRow, 0, len(input.Rows)/2)
for _, row := range input.Rows {
value := row.Value.([]interface{})
// value[0] is the array of channels; value[1] is the actual value
if !checkChannels || channelsIntersect(visibleChannels, value[0].([]interface{})) {
// Add this row:
stripSyncProperty(row)
result.Rows = append(result.Rows, &walrus.ViewRow{
Key: row.Key,
Value: value[1],
ID: row.ID,
Doc: row.Doc,
})
}
}
return
}
// Is any item of channels found in visibleChannels?
func channelsIntersect(visibleChannels ch.TimedSet, channels []interface{}) bool {
for _, channel := range channels {
if visibleChannels.Contains(channel.(string)) || channel == "*" {
return true
}
}
return false
}
// Cleans up the Value property, and removes rows that aren't visible to the current user
func filterViewResult(input sgbucket.ViewResult, user auth.User, applyChannelFiltering bool) (result sgbucket.ViewResult) {
hasStarChannel := false
var visibleChannels ch.TimedSet
if user != nil {
visibleChannels = user.InheritedChannels()
hasStarChannel = !visibleChannels.Contains("*")
if !applyChannelFiltering {
return // this is an error
}
}
result.TotalRows = input.TotalRows
result.Rows = make([]*sgbucket.ViewRow, 0, len(input.Rows)/2)
for _, row := range input.Rows {
if applyChannelFiltering {
value, ok := row.Value.([]interface{})
if ok {
// value[0] is the array of channels; value[1] is the actual value
if !hasStarChannel || channelsIntersect(visibleChannels, value[0].([]interface{})) {
// Add this row:
stripSyncProperty(row)
result.Rows = append(result.Rows, &sgbucket.ViewRow{
Key: row.Key,
Value: value[1],
ID: row.ID,
Doc: row.Doc,
})
}
}
} else {
// Add the raw row:
stripSyncProperty(row)
result.Rows = append(result.Rows, &sgbucket.ViewRow{
Key: row.Key,
Value: row.Value,
ID: row.ID,
Doc: row.Doc,
})
}
}
result.TotalRows = len(result.Rows)
return
}
// HTTP handler for _all_docs
func (h *handler) handleAllDocs() error {
// http://wiki.apache.org/couchdb/HTTP_Bulk_Document_API
includeDocs := h.getBoolQuery("include_docs")
includeChannels := h.getBoolQuery("channels")
includeAccess := h.getBoolQuery("access") && h.user == nil
includeRevs := h.getBoolQuery("revs")
includeSeqs := h.getBoolQuery("update_seq")
// Get the doc IDs if this is a POST request:
var explicitDocIDs []string
if h.rq.Method == "POST" {
input, err := h.readJSON()
if err == nil {
keys, ok := input["keys"].([]interface{})
explicitDocIDs = make([]string, len(keys))
for i := 0; i < len(keys); i++ {
if explicitDocIDs[i], ok = keys[i].(string); !ok {
break
}
}
if !ok {
err = base.HTTPErrorf(http.StatusBadRequest, "Bad/missing keys")
}
}
} else if h.rq.Method == "GET" {
keys := h.getQuery("keys")
if len(keys) > 0 {
var queryKeys []string
err := json.Unmarshal([]byte(keys), &queryKeys)
if err != nil {
err = base.HTTPErrorf(http.StatusBadRequest, "Bad keys")
}
if len(queryKeys) > 0 {
explicitDocIDs = queryKeys
}
}
}
// Get the set of channels the user has access to; nil if user is admin or has access to user "*"
var availableChannels channels.TimedSet
if h.user != nil {
availableChannels = h.user.InheritedChannels()
if availableChannels == nil {
panic("no channels for user?")
}
if availableChannels.Contains(channels.UserStarChannel) {
availableChannels = nil
}
}
// Subroutines that filter a channel list down to the ones that the user has access to:
filterChannels := func(channels []string) []string {
if availableChannels == nil {
return channels
}
dst := 0
for _, ch := range channels {
if availableChannels.Contains(ch) {
channels[dst] = ch
dst++
}
}
if dst == 0 {
return nil
}
return channels[0:dst]
}
filterChannelSet := func(channelMap channels.ChannelMap) []string {
var result []string
if availableChannels == nil {
result = []string{}
}
for ch, rm := range channelMap {
if availableChannels == nil || availableChannels.Contains(ch) {
//Do not include channels doc removed from in this rev
if rm == nil {
result = append(result, ch)
}
}
}
return result
}
type allDocsRowValue struct {
Rev string `json:"rev"`
Channels []string `json:"channels,omitempty"`
Access map[string]base.Set `json:"access,omitempty"` // for admins only
}
type allDocsRow struct {
Key string `json:"key"`
ID string `json:"id,omitempty"`
Value *allDocsRowValue `json:"value,omitempty"`
Doc db.Body `json:"doc,omitempty"`
UpdateSeq uint64 `json:"update_seq,omitempty"`
Error string `json:"error,omitempty"`
Status int `json:"status,omitempty"`
}
// Subroutine that creates a response row for a document:
totalRows := 0
createRow := func(doc db.IDAndRev, channels []string) *allDocsRow {
row := &allDocsRow{Key: doc.DocID}
value := allDocsRowValue{}
// Filter channels to ones available to user, and bail out if inaccessible:
if explicitDocIDs == nil {
if channels = filterChannels(channels); channels == nil {
return nil // silently skip this doc
}
}
if explicitDocIDs != nil || includeDocs || includeAccess {
// Fetch the document body and other metadata that lives with it:
body, channelSet, access, roleAccess, _, _, err := h.db.GetRevAndChannels(doc.DocID, doc.RevID, includeRevs)
if err != nil {
row.Status, _ = base.ErrorAsHTTPStatus(err)
return row
} else if body["_removed"] != nil {
row.Status = http.StatusForbidden
return row
}
if explicitDocIDs != nil {
if channels = filterChannelSet(channelSet); channels == nil {
row.Status = http.StatusForbidden
return row
}
doc.RevID = body["_rev"].(string)
}
if includeDocs {
row.Doc = body
}
if includeAccess && (access != nil || roleAccess != nil) {
value.Access = map[string]base.Set{}
for userName, channels := range access {
value.Access[userName] = channels.AsSet()
}
for roleName, channels := range roleAccess {
value.Access["role:"+roleName] = channels.AsSet()
}
}
}
row.Value = &value
row.ID = doc.DocID
value.Rev = doc.RevID
if includeSeqs {
row.UpdateSeq = doc.Sequence
}
if includeChannels {
row.Value.Channels = channels
}
return row
}
// Subroutine that writes a response entry for a document:
writeDoc := func(doc db.IDAndRev, channels []string) bool {
row := createRow(doc, channels)
if row != nil {
if row.Status >= 300 {
row.Error = base.CouchHTTPErrorName(row.Status)
}
if totalRows > 0 {
h.response.Write([]byte(","))
}
totalRows++
h.addJSON(row)
return true
}
return false
}
var options db.ForEachDocIDOptions
options.Startkey = h.getQuery("startkey")
options.Endkey = h.getQuery("endkey")
options.Limit = h.getIntQuery("limit", 0)
// Now it's time to actually write the response!
lastSeq, _ := h.db.LastSequence()
h.setHeader("Content-Type", "application/json")
h.response.Write([]byte(`{"rows":[` + "\n"))
if explicitDocIDs != nil {
count := uint64(0)
for _, docID := range explicitDocIDs {
writeDoc(db.IDAndRev{DocID: docID, RevID: "", Sequence: 0}, nil)
count++
if options.Limit > 0 && count == options.Limit {
break
}
}
} else {
if err := h.db.ForEachDocID(writeDoc, options); err != nil {
return err
}
}
h.response.Write([]byte(fmt.Sprintf("],\n"+`"total_rows":%d,"update_seq":%d}`,
totalRows, lastSeq)))
return nil
}
