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Replace Paste.Content field by P.URL and FU.PasteID

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This commit is contained in:
Daan Sprenkels 2021-05-31 09:27:09 +02:00
parent 29ee3dc6fd
commit a45705540c
5 changed files with 117 additions and 55 deletions
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71
handlers.go
View File

@ -12,7 +12,6 @@ import (
"time"
"gitea.hashru.nl/dsprenkels/rushlink/internal/db"
"github.com/google/uuid"
"github.com/gorilla/mux"
"github.com/pkg/errors"
)
@ -94,7 +93,6 @@ func (rl *rushlink) viewPasteHandlerFlags(w http.ResponseWriter, r *http.Request
vars := mux.Vars(r)
key := vars["key"]
var p *db.Paste
var fu *db.FileUpload
var notFound bool
err := rl.db.Transaction(func(tx *db.Database) error {
var err error
@ -102,14 +100,6 @@ func (rl *rushlink) viewPasteHandlerFlags(w http.ResponseWriter, r *http.Request
if err != nil {
return err
}
if p != nil && p.Type == db.PasteTypeFileUpload {
var id uuid.UUID
copy(id[:], p.Content)
fu, err = db.GetFileUpload(tx, id)
if err != nil {
return err
}
}
return nil
})
if notFound {
@ -123,12 +113,12 @@ func (rl *rushlink) viewPasteHandlerFlags(w http.ResponseWriter, r *http.Request
rl.renderError(w, r, status, err.Error())
return
}
rl.viewPasteHandlerInner(w, r, flags, p, fu)
rl.viewPasteHandlerInner(w, r, flags, p)
}
func (rl *rushlink) viewPasteHandlerInner(w http.ResponseWriter, r *http.Request, flags viewPaste, p *db.Paste, fu *db.FileUpload) {
func (rl *rushlink) viewPasteHandlerInner(w http.ResponseWriter, r *http.Request, flags viewPaste, p *db.Paste) {
if flags&viewShowMeta != 0 {
rl.viewPasteHandlerInnerMeta(w, r, p, fu)
rl.viewPasteHandlerInnerMeta(w, r, p)
return
}
@ -136,10 +126,7 @@ func (rl *rushlink) viewPasteHandlerInner(w http.ResponseWriter, r *http.Request
case db.PasteStatePresent:
switch p.Type {
case db.PasteTypeFileUpload:
if fu == nil {
panic(fmt.Sprintf("file for id %v does not exist in database\n", string(p.Content)))
}
rl.viewFileUploadHandler(w, r, fu)
rl.viewFileUploadHandler(w, r, p.FileUpload)
return
case db.PasteTypeRedirect:
if flags&viewNoRedirect != 0 {
@ -191,7 +178,7 @@ func (rl *rushlink) viewFileUploadHandler(w http.ResponseWriter, r *http.Request
http.ServeContent(w, r, fu.FileName, modtime, file)
}
func (rl *rushlink) viewPasteHandlerInnerMeta(w http.ResponseWriter, r *http.Request, p *db.Paste, fu *db.FileUpload) {
func (rl *rushlink) viewPasteHandlerInnerMeta(w http.ResponseWriter, r *http.Request, p *db.Paste) {
var cd canDelete
deleteToken := getDeleteTokenFromRequest(r)
if deleteToken != "" {
@ -203,8 +190,8 @@ func (rl *rushlink) viewPasteHandlerInnerMeta(w http.ResponseWriter, r *http.Req
}
var fileExt string
if fu != nil {
fileExt = fu.Ext()
if p.FileUpload != nil {
fileExt = p.FileUpload.Ext()
}
data := map[string]interface{}{
"Paste": p,
@ -290,7 +277,7 @@ func (rl *rushlink) newFileUploadPasteHandler(w http.ResponseWriter, r *http.Req
panic(errors.Wrap(err, "saving fileUpload in db"))
}
paste, err = shortenFileUploadID(tx, fu.PubID)
paste, err = shortenFileUploadID(tx, fu)
return err
}); err != nil {
panic(err)
@ -370,25 +357,39 @@ func (rl *rushlink) deletePasteHandler(w http.ResponseWriter, r *http.Request) {
//
// Returns the new paste key if the fileUpload was successfully added to the
// database
func shortenFileUploadID(tx *db.Database, id uuid.UUID) (*db.Paste, error) {
return shorten(tx, db.PasteTypeFileUpload, id[:])
func shortenFileUploadID(tx *db.Database, fu *db.FileUpload) (*db.Paste, error) {
// Generate the paste key
pasteKey, err := db.GeneratePasteKey(tx, highOnlineEntropy)
if err != nil {
return nil, errors.Wrap(err, "generating paste key")
}
// Also generate a deleteToken
deleteToken, err := db.GenerateDeleteToken()
if err != nil {
return nil, errors.Wrap(err, "generating delete token")
}
// Store the new
p := db.Paste{
Type: db.PasteTypeFileUpload,
State: db.PasteStatePresent,
FileUpload: fu,
Key: pasteKey,
DeleteToken: deleteToken,
}
if err := p.Save(tx); err != nil {
return nil, err
}
return &p, nil
}
// Add a new URL to the database
//
// Returns the new paste key if the url was successfully shortened
func shortenURL(tx *db.Database, userURL *url.URL) (*db.Paste, error) {
return shorten(tx, db.PasteTypeRedirect, []byte(userURL.String()))
}
// Add a paste (of any kind) to the database with arbitrary content.
func shorten(tx *db.Database, ty db.PasteType, content []byte) (*db.Paste, error) {
// Generate the paste key
var keyEntropy int
if ty == db.PasteTypeFileUpload || ty == db.PasteTypePaste {
keyEntropy = highOnlineEntropy
}
pasteKey, err := db.GeneratePasteKey(tx, keyEntropy)
pasteKey, err := db.GeneratePasteKey(tx, 0)
if err != nil {
return nil, errors.Wrap(err, "generating paste key")
}
@ -401,9 +402,9 @@ func shorten(tx *db.Database, ty db.PasteType, content []byte) (*db.Paste, error
// Store the new key
p := db.Paste{
Type: ty,
Type: db.PasteTypeRedirect,
State: db.PasteStatePresent,
Content: content,
URL: userURL.String(),
Key: pasteKey,
DeleteToken: deleteToken,
}

6
internal/db/db.go
View File

@ -35,7 +35,11 @@ var (
LogLevel: logger.Warn,
Colorful: true,
})
gormConfig = gorm.Config{Logger: gormLogger, PrepareStmt: true}
gormConfig = gorm.Config{
Logger: gormLogger,
PrepareStmt: true,
DisableForeignKeyConstraintWhenMigrating: true,
}
)
// OpenDBFromEnvironment tries to open an SQL database, described by

2
internal/db/fileupload.go
View File

@ -38,6 +38,8 @@ type FileUpload struct {
// UUID publically identifies this FileUpload.
PubID uuid.UUID `gorm:"uniqueIndex"`
PasteID uint
// FileName contains the original filename of this FileUpload.
FileName string

65
internal/db/migrate.go
View File

@ -38,8 +38,69 @@ func Gormigrate(db *gorm.DB) *gormigrate.Gormigrate {
}
return tx.AutoMigrate(&FileUpload{}, &Paste{})
},
Rollback: func(tx *gorm.DB) error {
return tx.Migrator().DropTable(&FileUpload{}, &Paste{})
},
{
ID: "202107231722",
Migrate: func(tx *gorm.DB) error {
// Update the schema
type FileUpload struct {
ID uint `gorm:"primaryKey"`
State FileUploadState `gorm:"index"`
PubID uuid.UUID `gorm:"uniqueIndex"`
PasteID uint
FileName string
ContentType string
Checksum uint32
CreatedAt time.Time
UpdatedAt time.Time
DeletedAt gorm.DeletedAt
}
type Paste struct {
ID uint `gorm:"primaryKey"`
Type PasteType `gorm:"index"`
State PasteState `gorm:"index"`
Content []byte
URL string
FileUpload *FileUpload
Key string `gorm:"uniqueIndex"`
DeleteToken string
CreatedAt time.Time
UpdatedAt time.Time
DeletedAt gorm.DeletedAt
}
err := tx.AutoMigrate(&FileUpload{}, &Paste{})
if err != nil {
return err
}
// Migrate the data
pastes := make([]Paste, 0)
if err := tx.Model(&Paste{}).Find(&pastes).Error; err != nil {
return err
}
for _, p := range pastes {
switch p.Type {
case PasteTypeRedirect:
p.URL = string(p.Content)
tx.Model(p).Select("Content", "URL").Updates(p)
case PasteTypeFileUpload:
var id uuid.UUID
var fus []FileUpload
copy(id[:], p.Content)
if err := db.Unscoped().Limit(1).Where("pub_id = ?", id).Find(&fus).Error; err != nil {
return err
}
p.FileUpload = &fus[0]
tx.Model(p).Select("Content", "FileUpload").Updates(p)
default:
continue
}
}
// Currently there is a bug in GORM, which causes a nil ptr
// dereference when you try dropping a column in an sqlite3
// database.
return nil
},
},
})

28
internal/db/paste.go
View File

@ -8,9 +8,9 @@ import (
"strings"
"time"
"github.com/google/uuid"
"github.com/pkg/errors"
"gorm.io/gorm"
"gorm.io/gorm/clause"
)
// PasteType describes the type of Paste (i.e. file, redirect, [...]).
@ -24,7 +24,8 @@ type Paste struct {
ID uint `gorm:"primaryKey"`
Type PasteType `gorm:"index"`
State PasteState `gorm:"index"`
Content []byte
URL string
FileUpload *FileUpload
Key string `gorm:"uniqueIndex"`
DeleteToken string
CreatedAt time.Time
@ -146,7 +147,7 @@ func ValidatePasteKey(key string) error {
// the key format first.
func GetPasteNoValidate(db *gorm.DB, key string) (*Paste, error) {
var ps []Paste
if err := db.Unscoped().Limit(1).Where("key = ?", key).Find(&ps).Error; err != nil {
if err := db.Unscoped().Preload(clause.Associations).Where("key = ?", key).Find(&ps).Error; err != nil {
return nil, err
}
if len(ps) == 0 {
@ -163,16 +164,8 @@ func (p *Paste) Save(db *gorm.DB) error {
// Delete deletes this Paste from the database.
func (p *Paste) Delete(db *gorm.DB, fs *FileStore) error {
// Remove the (maybe) attached file
if p.Type == PasteTypeFileUpload {
fuID, err := uuid.FromBytes(p.Content)
if err != nil {
return errors.Wrap(err, "failed to parse uuid")
}
fu, err := GetFileUpload(db, fuID)
if err != nil {
return errors.Wrap(err, "failed to find file in database")
}
if err := fu.Delete(db, fs); err != nil {
if p.FileUpload != nil {
if err := p.FileUpload.Delete(db, fs); err != nil {
return errors.Wrap(err, "failed to remove file")
}
}
@ -180,7 +173,9 @@ func (p *Paste) Delete(db *gorm.DB, fs *FileStore) error {
// Wipe the old paste
p.Type = PasteTypeUndef
p.State = PasteStateDeleted
p.Content = []byte{}
p.URL = ""
p.FileUpload = nil
if err := db.Save(&p).Error; err != nil {
return errors.Wrap(err, "failed to wipe paste in database")
}
@ -199,10 +194,9 @@ func (p *Paste) RedirectURL() *url.URL {
if p.Type != PasteTypeRedirect {
panic("expected p.Type to be PasteTypeRedirect")
}
rawurl := string(p.Content)
urlParse, err := url.Parse(rawurl)
urlParse, err := url.Parse(p.URL)
if err != nil {
panic(errors.Wrapf(err, "invalid URL ('%v') in database for key '%v'", rawurl, p.Key))
panic(errors.Wrapf(err, "invalid URL ('%v') in database for key '%v'", p.URL, p.Key))
}
return urlParse
}