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WIP: Since ID, works

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This commit is contained in:
Philipp Heckel 2022-02-26 15:57:10 -05:00
parent ce9e9f3e0d
commit 4af9c07577
7 changed files with 153 additions and 33 deletions
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2
server/cache.go
View file

@ -14,7 +14,7 @@ var (
// i.e. message structs with the Event messageEvent.
type cache interface {
AddMessage(m *message) error
Messages(topic string, since sinceTime, scheduled bool) ([]*message, error)
Messages(topic string, since sinceMarker, scheduled bool) ([]*message, error)
MessagesDue() ([]*message, error)
MessageCount(topic string) (int, error)
Topics() (map[string]*topic, error)

2
server/cache_mem.go
View file

@ -54,7 +54,7 @@ func (c *memCache) AddMessage(m *message) error {
return nil
}
func (c *memCache) Messages(topic string, since sinceTime, scheduled bool) ([]*message, error) {
func (c *memCache) Messages(topic string, since sinceMarker, scheduled bool) ([]*message, error) {
c.mu.Lock()
defer c.mu.Unlock()
if _, ok := c.messages[topic]; !ok || since.IsNone() {

98
server/cache_sqlite.go
View file

@ -15,7 +15,8 @@ const (
createMessagesTableQuery = `
BEGIN;
CREATE TABLE IF NOT EXISTS messages (
id TEXT PRIMARY KEY,
id INTEGER PRIMARY KEY AUTOINCREMENT,
mid TEXT NOT NULL,
time INT NOT NULL,
topic TEXT NOT NULL,
message TEXT NOT NULL,
@ -32,42 +33,59 @@ const (
encoding TEXT NOT NULL,
published INT NOT NULL
);
CREATE INDEX IF NOT EXISTS idx_mid ON messages (mid);
CREATE INDEX IF NOT EXISTS idx_topic ON messages (topic);
COMMIT;
`
insertMessageQuery = `
INSERT INTO messages (id, time, topic, message, title, priority, tags, click, attachment_name, attachment_type, attachment_size, attachment_expires, attachment_url, attachment_owner, encoding, published)
INSERT INTO messages (mid, time, topic, message, title, priority, tags, click, attachment_name, attachment_type, attachment_size, attachment_expires, attachment_url, attachment_owner, encoding, published)
VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)
`
pruneMessagesQuery = `DELETE FROM messages WHERE time < ? AND published = 1`
selectMessagesSinceTimeQuery = `
SELECT id, time, topic, message, title, priority, tags, click, attachment_name, attachment_type, attachment_size, attachment_expires, attachment_url, attachment_owner, encoding
SELECT mid, time, topic, message, title, priority, tags, click, attachment_name, attachment_type, attachment_size, attachment_expires, attachment_url, attachment_owner, encoding
FROM messages
WHERE topic = ? AND time >= ? AND published = 1
ORDER BY time ASC
ORDER BY time, id
`
selectMessagesSinceTimeIncludeScheduledQuery = `
SELECT id, time, topic, message, title, priority, tags, click, attachment_name, attachment_type, attachment_size, attachment_expires, attachment_url, attachment_owner, encoding
SELECT mid, time, topic, message, title, priority, tags, click, attachment_name, attachment_type, attachment_size, attachment_expires, attachment_url, attachment_owner, encoding
FROM messages
WHERE topic = ? AND time >= ?
ORDER BY time ASC
ORDER BY time, id
`
selectMessagesSinceIDQuery = `
SELECT mid, time, topic, message, title, priority, tags, click, attachment_name, attachment_type, attachment_size, attachment_expires, attachment_url, attachment_owner, encoding
FROM messages
WHERE topic = ?
AND published = 1
AND id > (SELECT IFNULL(id,0) FROM messages WHERE mid = ?)
ORDER BY time, id
`
selectMessagesSinceIDIncludeScheduledQuery = `
SELECT mid, time, topic, message, title, priority, tags, click, attachment_name, attachment_type, attachment_size, attachment_expires, attachment_url, attachment_owner, encoding
FROM messages
WHERE topic = ?
AND id > (SELECT IFNULL(id,0) FROM messages WHERE mid = ?)
ORDER BY time, id
`
selectMessagesDueQuery = `
SELECT id, time, topic, message, title, priority, tags, click, attachment_name, attachment_type, attachment_size, attachment_expires, attachment_url, attachment_owner, encoding
SELECT mid, time, topic, message, title, priority, tags, click, attachment_name, attachment_type, attachment_size, attachment_expires, attachment_url, attachment_owner, encoding
FROM messages
WHERE time <= ? AND published = 0
ORDER BY time, id
`
updateMessagePublishedQuery = `UPDATE messages SET published = 1 WHERE id = ?`
updateMessagePublishedQuery = `UPDATE messages SET published = 1 WHERE mid = ?`
selectMessagesCountQuery = `SELECT COUNT(*) FROM messages`
selectMessageCountForTopicQuery = `SELECT COUNT(*) FROM messages WHERE topic = ?`
selectTopicsQuery = `SELECT topic FROM messages GROUP BY topic`
selectAttachmentsSizeQuery = `SELECT IFNULL(SUM(attachment_size), 0) FROM messages WHERE attachment_owner = ? AND attachment_expires >= ?`
selectAttachmentsExpiredQuery = `SELECT id FROM messages WHERE attachment_expires > 0 AND attachment_expires < ?`
selectAttachmentsExpiredQuery = `SELECT mid FROM messages WHERE attachment_expires > 0 AND attachment_expires < ?`
)
// Schema management queries
const (
currentSchemaVersion = 4
currentSchemaVersion = 5
createSchemaVersionTableQuery = `
CREATE TABLE IF NOT EXISTS schemaVersion (
id INT PRIMARY KEY,
@ -108,6 +126,43 @@ const (
migrate3To4AlterMessagesTableQuery = `
ALTER TABLE messages ADD COLUMN encoding TEXT NOT NULL DEFAULT('');
`
// 4 -> 5
migrate4To5AlterMessagesTableQuery = `
BEGIN;
CREATE TABLE IF NOT EXISTS messages_new (
id INTEGER PRIMARY KEY AUTOINCREMENT,
mid TEXT NOT NULL,
time INT NOT NULL,
topic TEXT NOT NULL,
message TEXT NOT NULL,
title TEXT NOT NULL,
priority INT NOT NULL,
tags TEXT NOT NULL,
click TEXT NOT NULL,
attachment_name TEXT NOT NULL,
attachment_type TEXT NOT NULL,
attachment_size INT NOT NULL,
attachment_expires INT NOT NULL,
attachment_url TEXT NOT NULL,
attachment_owner TEXT NOT NULL,
encoding TEXT NOT NULL,
published INT NOT NULL
);
CREATE INDEX IF NOT EXISTS idx_mid ON messages_new (mid);
CREATE INDEX IF NOT EXISTS idx_topic ON messages_new (topic);
INSERT
INTO messages_new (
mid, time, topic, message, title, priority, tags, click, attachment_name, attachment_type,
attachment_size, attachment_expires, attachment_url, attachment_owner, encoding, published)
SELECT
id, time, topic, message, title, priority, tags, click, attachment_name, attachment_type,
attachment_size, attachment_expires, attachment_url, attachment_owner, encoding, published
FROM messages;
DROP TABLE messages;
ALTER TABLE messages_new RENAME TO messages;
COMMIT;
`
)
type sqliteCache struct {
@ -167,17 +222,25 @@ func (c *sqliteCache) AddMessage(m *message) error {
return err
}
func (c *sqliteCache) Messages(topic string, since sinceTime, scheduled bool) ([]*message, error) {
func (c *sqliteCache) Messages(topic string, since sinceMarker, scheduled bool) ([]*message, error) {
if since.IsNone() {
return make([]*message, 0), nil
}
var rows *sql.Rows
var err error
if since.IsID() {
if scheduled {
rows, err = c.db.Query(selectMessagesSinceIDIncludeScheduledQuery, topic, since.ID())
} else {
rows, err = c.db.Query(selectMessagesSinceIDQuery, topic, since.ID())
}
} else {
if scheduled {
rows, err = c.db.Query(selectMessagesSinceTimeIncludeScheduledQuery, topic, since.Time().Unix())
} else {
rows, err = c.db.Query(selectMessagesSinceTimeQuery, topic, since.Time().Unix())
}
}
if err != nil {
return nil, err
}
@ -373,6 +436,8 @@ func setupCacheDB(db *sql.DB) error {
return migrateFrom2(db)
} else if schemaVersion == 3 {
return migrateFrom3(db)
} else if schemaVersion == 4 {
return migrateFrom4(db)
}
return fmt.Errorf("unexpected schema version found: %d", schemaVersion)
}
@ -434,5 +499,16 @@ func migrateFrom3(db *sql.DB) error {
if _, err := db.Exec(updateSchemaVersion, 4); err != nil {
return err
}
return migrateFrom4(db)
}
func migrateFrom4(db *sql.DB) error {
log.Print("Migrating cache database schema: from 4 to 5")
if _, err := db.Exec(migrate4To5AlterMessagesTableQuery); err != nil {
return err
}
if _, err := db.Exec(updateSchemaVersion, 5); err != nil {
return err
}
return nil // Update this when a new version is added
}

2
server/cache_test.go
View file

@ -42,7 +42,7 @@ func testCacheMessages(t *testing.T, c cache) {
require.Empty(t, messages)
// mytopic: since 2
messages, _ = c.Messages("mytopic", sinceTime(time.Unix(2, 0)), false)
messages, _ = c.Messages("mytopic", newSinceTime(2), false)
require.Equal(t, 1, len(messages))
require.Equal(t, "my other message", messages[0].Message)

22
server/server.go
View file

@ -805,7 +805,7 @@ func (s *Server) handleSubscribeWS(w http.ResponseWriter, r *http.Request, v *vi
return err
}
func parseSubscribeParams(r *http.Request) (poll bool, since sinceTime, scheduled bool, filters *queryFilter, err error) {
func parseSubscribeParams(r *http.Request) (poll bool, since sinceMarker, scheduled bool, filters *queryFilter, err error) {
poll = readBoolParam(r, false, "x-poll", "poll", "po")
scheduled = readBoolParam(r, false, "x-scheduled", "scheduled", "sched")
since, err = parseSince(r, poll)
@ -819,7 +819,7 @@ func parseSubscribeParams(r *http.Request) (poll bool, since sinceTime, schedule
return
}
func (s *Server) sendOldMessages(topics []*topic, since sinceTime, scheduled bool, sub subscriber) error {
func (s *Server) sendOldMessages(topics []*topic, since sinceMarker, scheduled bool, sub subscriber) error {
if since.IsNone() {
return nil
}
@ -841,20 +841,28 @@ func (s *Server) sendOldMessages(topics []*topic, since sinceTime, scheduled boo
//
// Values in the "since=..." parameter can be either a unix timestamp or a duration (e.g. 12h), or
// "all" for all messages.
func parseSince(r *http.Request, poll bool) (sinceTime, error) {
func parseSince(r *http.Request, poll bool) (sinceMarker, error) {
since := readParam(r, "x-since", "since", "si")
// Easy cases (empty, all, none)
if since == "" {
if poll {
return sinceAllMessages, nil
}
return sinceNoMessages, nil
}
if since == "all" {
} else if since == "all" {
return sinceAllMessages, nil
} else if since == "none" {
return sinceNoMessages, nil
}
// ID, timestamp, duration
if validMessageID(since) {
return newSinceID(since), nil
} else if s, err := strconv.ParseInt(since, 10, 64); err == nil {
return sinceTime(time.Unix(s, 0)), nil
return newSinceTime(s), nil
} else if d, err := time.ParseDuration(since); err == nil {
return sinceTime(time.Now().Add(-1 * d)), nil
return newSinceTime(time.Now().Add(-1 * d).Unix()), nil
}
return sinceNoMessages, errHTTPBadRequestSinceInvalid
}

39
server/types.go
View file

@ -15,7 +15,7 @@ const (
)
const (
messageIDLength = 10
messageIDLength = 12
)
// message represents a message published to a topic
@ -74,23 +74,46 @@ func newDefaultMessage(topic, msg string) *message {
return newMessage(messageEvent, topic, msg)
}
type sinceTime time.Time
func validMessageID(s string) bool {
return util.ValidRandomString(s, messageIDLength)
}
func (t sinceTime) IsAll() bool {
type sinceMarker struct {
time time.Time
id string
}
func newSinceTime(timestamp int64) sinceMarker {
return sinceMarker{time.Unix(timestamp, 0), ""}
}
func newSinceID(id string) sinceMarker {
return sinceMarker{time.Unix(0, 0), id}
}
func (t sinceMarker) IsAll() bool {
return t == sinceAllMessages
}
func (t sinceTime) IsNone() bool {
func (t sinceMarker) IsNone() bool {
return t == sinceNoMessages
}
func (t sinceTime) Time() time.Time {
return time.Time(t)
func (t sinceMarker) IsID() bool {
return t.id != ""
}
func (t sinceMarker) Time() time.Time {
return t.time
}
func (t sinceMarker) ID() string {
return t.id
}
var (
sinceAllMessages = sinceTime(time.Unix(0, 0))
sinceNoMessages = sinceTime(time.Unix(1, 0))
sinceAllMessages = sinceMarker{time.Unix(0, 0), ""}
sinceNoMessages = sinceMarker{time.Unix(1, 0), ""}
)
type queryFilter struct {

15
util/util.go
View file

@ -88,7 +88,20 @@ func RandomString(length int) string {
return string(b)
}
// DurationToHuman converts a duration to a human readable format
// ValidRandomString returns true if the given string matches the format created by RandomString
func ValidRandomString(s string, length int) bool {
if len(s) != length {
return false
}
for _, c := range strings.Split(s, "") {
if !strings.Contains(randomStringCharset, c) {
return false
}
}
return true
}
// DurationToHuman converts a duration to a human-readable format
func DurationToHuman(d time.Duration) (str string) {
if d == 0 {
return "0"