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thinkin bout db

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This commit is contained in:
vilmibm 2022-06-14 16:05:39 -05:00
parent 0ff1380263
commit 98f6d67eca
4 changed files with 363 additions and 387 deletions
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14
server/cmd/api/api_test.go
View File

@ -11,6 +11,7 @@ import (
"testing"
"git.tilde.town/tildetown/bbj2/server/cmd/config"
"git.tilde.town/tildetown/bbj2/server/cmd/db"
)
func TestInstanceInfo(t *testing.T) {
@ -26,7 +27,7 @@ func TestInstanceInfo(t *testing.T) {
t.Fatalf("failed to make test db: %s", err.Error())
}
logger := log.New(os.Stdout, "bbj test", log.Lshortfile)
defaultOptions := config.Options{
opts := config.Options{
IO: testIO,
Logger: logger,
Config: config.Config{
@ -38,6 +39,14 @@ func TestInstanceInfo(t *testing.T) {
DBPath: dbFile.Name(),
},
}
teardown, err := db.Setup(opts)
if err != nil {
t.Fatalf("could not initialize DB: %s", err.Error())
return
}
defer teardown()
ts := []struct {
name string
opts config.Options
@ -46,7 +55,7 @@ func TestInstanceInfo(t *testing.T) {
}{
{
name: "basic",
opts: defaultOptions,
opts: opts,
wantData: instanceInfo{
InstanceName: "cool test zone",
AllowAnon: true,
@ -54,7 +63,6 @@ func TestInstanceInfo(t *testing.T) {
},
},
}
for _, tt := range ts {
t.Run(tt.name, func(t *testing.T) {
req, _ := http.NewRequest("GET", "", strings.NewReader(""))

62
server/cmd/db/db.go
View File

@ -1,7 +1,26 @@
package db
import "time"
import (
"database/sql"
_ "embed"
"errors"
"fmt"
"os"
"strings"
"time"
"git.tilde.town/tildetown/bbj2/server/cmd/config"
_ "github.com/mattn/go-sqlite3"
)
//go:embed schema.sql
var schemaSQL string
// TODO I'm not sold on this hash system; without transport encryption, it
// doesn't really help anything. I'd rather have plaintext + transport
// encryption and then, on the server side, proper salted hashing. I can't
// figure out if there was a reason for this approach that I'm just
// overlooking.
type User struct {
ID string
Username string
@ -29,3 +48,44 @@ type Message struct {
Body string
SendRaw int `json:"send_raw"` // TODO bool
}
func Setup(opts config.Options) (func(), error) {
db, err := sql.Open("sqlite3", opts.Config.DBPath)
opts.DB = db
return func() { db.Close() }, err
}
func EnsureSchema(opts config.Options) error {
db := opts.DB
if opts.Reset {
err := os.Remove(opts.Config.DBPath)
if err != nil {
return fmt.Errorf("failed to delete database: %w", err)
}
}
rows, err := db.Query("select version from meta")
if err == nil {
defer rows.Close()
rows.Next()
var version string
err = rows.Scan(&version)
if err != nil {
return fmt.Errorf("failed to check database schema version: %w", err)
} else if version == "" {
return errors.New("database is in unknown state")
}
return nil
}
if !strings.Contains(err.Error(), "no such table") {
return fmt.Errorf("got error checking database state: %w", err)
}
_, err = db.Exec(schemaSQL)
if err != nil {
return fmt.Errorf("failed to initialize database schema: %w", err)
}
return nil
}

122
server/cmd/main.go
View File

@ -1,27 +1,21 @@
package main
import (
"database/sql"
_ "embed"
"encoding/json"
"errors"
"flag"
"fmt"
"log"
"net/http"
"os"
"strings"
"git.tilde.town/tildetown/bbj2/server/cmd/api"
"git.tilde.town/tildetown/bbj2/server/cmd/config"
"git.tilde.town/tildetown/bbj2/server/cmd/db"
_ "github.com/mattn/go-sqlite3"
)
// TODO tests
//go:embed schema.sql
var schemaSQL string
func main() {
var configFlag = flag.String("config", "config.yml", "A path to a config file.")
var resetFlag = flag.Bool("reset", false, "reset the database. WARNING this wipes everything.")
@ -44,13 +38,20 @@ func main() {
}
}
type Teardown func()
/*
func setupDB(opts *config.Options) (Teardown, error) {
db, err := sql.Open("sqlite3", opts.Config.DBPath)
opts.DB = db
return func() { db.Close() }, err
}
TODO my next initiative is doing /something/ about the database layer.
The amount of boiler plate involved in:
- prepare a statement
- prepare a result struct
- execute statement
- scan into result
is wild; the error handling is really out of control. I need to think of abstractions for this. The "easiest" is just making blunt, non performant functions that return structs and a single error, but that could get out of control too. In general I think not having raw sql ever in application code is a good place to start.
*/
func _main(opts *config.Options) error {
cfg, err := config.ParseConfig(opts.ConfigPath)
@ -61,13 +62,13 @@ func _main(opts *config.Options) error {
opts.Config = *cfg
teardown, err := setupDB(opts)
teardown, err := db.Setup(*opts)
if err != nil {
return fmt.Errorf("could not initialize DB: %w", err)
}
defer teardown()
err = ensureSchema(*opts)
err = db.EnsureSchema(*opts)
if err != nil {
return err
}
@ -83,41 +84,6 @@ func _main(opts *config.Options) error {
return nil
}
func ensureSchema(opts config.Options) error {
db := opts.DB
if opts.Reset {
err := os.Remove(opts.Config.DBPath)
if err != nil {
return fmt.Errorf("failed to delete database: %w", err)
}
}
rows, err := db.Query("select version from meta")
if err == nil {
defer rows.Close()
rows.Next()
var version string
err = rows.Scan(&version)
if err != nil {
return fmt.Errorf("failed to check database schema version: %w", err)
} else if version == "" {
return errors.New("database is in unknown state")
}
return nil
}
if !strings.Contains(err.Error(), "no such table") {
return fmt.Errorf("got error checking database state: %w", err)
}
_, err = db.Exec(schemaSQL)
if err != nil {
return fmt.Errorf("failed to initialize database schema: %w", err)
}
return nil
}
func handler(opts config.Options, f http.HandlerFunc) http.HandlerFunc {
// TODO make this more real
return func(w http.ResponseWriter, req *http.Request) {
@ -127,37 +93,6 @@ func handler(opts config.Options, f http.HandlerFunc) http.HandlerFunc {
}
}
// TODO I'm not entirely sold on this hash system; without transport
// encryption, it doesn't really help anything. I'd rather have plaintext +
// transport encryption and then, on the server side, proper salted hashing.
// NB breaking: i'm not just returning 200 always but using http status codes
func checkAuth(opts config.Options, username, hash string) error {
db := opts.DB
stmt, err := db.Prepare("select auth_hash from users where user_name = ?")
if err != nil {
return fmt.Errorf("db error: %w", err)
}
defer stmt.Close()
opts.Logger.Printf("querying for %s", username)
var authHash string
if err = stmt.QueryRow(username).Scan(&authHash); err != nil {
if strings.Contains(err.Error(), "no rows in result") {
return errors.New("no such user")
}
return fmt.Errorf("db error: %w", err)
}
if authHash != hash {
return errors.New("bad credentials")
}
return nil
}
func setupAPI(opts config.Options) {
handleFailedAPICreate := func(w http.ResponseWriter, err error) {
opts.Logger.Printf("failed to create API: %s", err.Error())
@ -190,6 +125,31 @@ func setupAPI(opts config.Options) {
}))
/*
func checkAuth(opts config.Options, username, hash string) error {
db := opts.DB
stmt, err := db.Prepare("select auth_hash from users where user_name = ?")
if err != nil {
return fmt.Errorf("db error: %w", err)
}
defer stmt.Close()
opts.Logger.Printf("querying for %s", username)
var authHash string
if err = stmt.QueryRow(username).Scan(&authHash); err != nil {
if strings.Contains(err.Error(), "no rows in result") {
return errors.New("no such user")
}
return fmt.Errorf("db error: %w", err)
}
if authHash != hash {
return errors.New("bad credentials")
}
return nil
}
http.HandleFunc("/user_register", handler(opts, func(w http.ResponseWriter, req *http.Request) {
if req.Method != "POST" {
badMethod(w)

52
server/cmd/schema.sql
View File

@ -1,52 +0,0 @@
create table meta (
version text -- schema version
);
insert into meta values ("1.0.0");
create table users (
user_id text, -- string (uuid1)
user_name text, -- string
auth_hash text, -- string (sha256 hash)
quip text, -- string (possibly empty)
bio text, -- string (possibly empty)
color int, -- int (from 0 to 6)
is_admin int, -- bool
created real -- floating point unix timestamp (when this user registered)
);
insert into users values (
"be105a40-6bd1-405f-9716-aa6158ac1eef", -- TODO replace UUID with incrementing int
"anon",
"8e97c0b197816a652fb489b21e63f664863daa991e2f8fd56e2df71593c2793f",
"",
"",
0,
0,
1650819851
);
-- TODO unique constraint on user_name?
-- TODO foreign keys
create table threads (
thread_id text, -- uuid string
author text, -- string (uuid1, user.user_id)
title text, -- string
last_mod real, -- floating point unix timestamp (of last post or post edit)
created real, -- floating point unix timestamp (when thread was made)
reply_count int, -- integer (incremental, starting with 0)
pinned int, -- boolean
last_author text -- uuid string
);
create table messages (
thread_id text, -- string (uuid1 of parent thread)
post_id int, -- integer (incrementing from 1)
author text, -- string (uuid1, user.user_id)
created real, -- floating point unix timestamp (when reply was posted)
edited int, -- bool
body text, -- string
send_raw int -- bool (1/true == never apply formatting)
);