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export.go
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package notebrew
import (
"archive/tar"
"bytes"
"compress/gzip"
"context"
"database/sql"
"encoding/json"
"errors"
"fmt"
"html/template"
"io"
"io/fs"
"log/slog"
"mime"
"net/http"
"net/url"
"path"
"path/filepath"
"slices"
"strings"
"sync/atomic"
"time"
"unicode/utf8"
"github.com/bokwoon95/notebrew/sq"
"github.com/bokwoon95/notebrew/stacktrace"
"golang.org/x/sync/errgroup"
)
type exportAction int
const (
exportFiles exportAction = 1 << 0
exportDirectories exportAction = 1 << 1
)
func (nbrew *Notebrew) export(w http.ResponseWriter, r *http.Request, user User, sitePrefix string) {
type File struct {
FileID ID `json:"fileID"`
Name string `json:"name"`
IsDir bool `json:"isDir"`
Size int64 `json:"size"`
ModTime time.Time `json:"modTime"`
CreationTime time.Time `json:"creationTime"`
}
type Request struct {
Parent string `json:"parent"`
Names []string `json:"names"`
OutputName string `json:"outputName"`
}
type Response struct {
ContentBaseURL string `json:"contentBaseURL"`
CDNDomain string `json:"cdnDomain"`
IsDatabaseFS bool `json:"isDatabaseFS"`
SitePrefix string `json:"sitePrefix"`
UserID ID `json:"userID"`
Username string `json:"username"`
DisableReason string `json:"disableReason"`
Parent string `json:"parent"`
Names []string `json:"names"`
OutputName string `json:"outputName"`
ExportParent bool `json:"exportParent"`
TotalBytes int64 `json:"totalBytes"`
Files []File `json:"files"`
Error string `json:"error"`
FormErrors url.Values `json:"formErrors"`
}
switch r.Method {
case "GET", "HEAD":
writeResponse := func(w http.ResponseWriter, r *http.Request, response Response) {
if r.Form.Has("api") {
w.Header().Set("Content-Type", "application/json; charset=utf-8")
if r.Method == "HEAD" {
w.WriteHeader(http.StatusOK)
return
}
encoder := json.NewEncoder(w)
encoder.SetIndent("", " ")
encoder.SetEscapeHTML(false)
err := encoder.Encode(&response)
if err != nil {
nbrew.GetLogger(r.Context()).Error(err.Error())
}
return
}
referer := nbrew.GetReferer(r)
funcMap := map[string]any{
"join": path.Join,
"base": path.Base,
"ext": path.Ext,
"hasPrefix": strings.HasPrefix,
"trimPrefix": strings.TrimPrefix,
"humanReadableFileSize": HumanReadableFileSize,
"stylesCSS": func() template.CSS { return template.CSS(StylesCSS) },
"baselineJS": func() template.JS { return template.JS(BaselineJS) },
"referer": func() string { return referer },
"getFileType": func(name string) FileType {
return AllowedFileTypes[path.Ext(name)]
},
}
tmpl, err := template.New("export.html").Funcs(funcMap).ParseFS(RuntimeFS, "embed/export.html")
if err != nil {
nbrew.GetLogger(r.Context()).Error(err.Error())
nbrew.InternalServerError(w, r, err)
return
}
w.Header().Set("Content-Security-Policy", nbrew.ContentSecurityPolicy)
nbrew.ExecuteTemplate(w, r, tmpl, &response)
}
var response Response
_, err := nbrew.GetFlashSession(w, r, &response)
if err != nil {
nbrew.GetLogger(r.Context()).Error(err.Error())
}
response.ContentBaseURL = nbrew.ContentBaseURL(sitePrefix)
response.CDNDomain = nbrew.CDNDomain
switch v := nbrew.FS.(type) {
case interface{ As(any) bool }:
response.IsDatabaseFS = v.As(&DatabaseFS{})
}
response.UserID = user.UserID
response.Username = user.Username
response.DisableReason = user.DisableReason
response.SitePrefix = sitePrefix
response.Parent = path.Clean(strings.Trim(r.Form.Get("parent"), "/"))
names := r.Form["name"]
head, tail, _ := strings.Cut(response.Parent, "/")
switch head {
case ".":
response.ExportParent = true
case "notes", "pages", "posts", "output":
fileInfo, err := fs.Stat(nbrew.FS, path.Join(sitePrefix, response.Parent))
if err != nil {
if errors.Is(err, fs.ErrNotExist) {
response.Error = "InvalidParent"
writeResponse(w, r, response)
return
}
nbrew.GetLogger(r.Context()).Error(err.Error())
nbrew.InternalServerError(w, r, err)
return
}
if !fileInfo.IsDir() {
response.Error = "InvalidParent"
writeResponse(w, r, response)
return
}
if len(names) == 0 {
response.ExportParent = true
} else {
seen := make(map[string]bool)
n := 0
for _, name := range names {
name := filepath.ToSlash(name)
if strings.Contains(name, "/") {
continue
}
if seen[name] {
continue
}
seen[name] = true
names[n] = name
n++
}
names = names[:n]
}
default:
response.Error = "InvalidParent"
writeResponse(w, r, response)
return
}
if nbrew.DB != nil {
exists, err := sq.FetchExists(r.Context(), nbrew.DB, sq.Query{
Dialect: nbrew.Dialect,
Format: "SELECT 1 FROM export_job WHERE site_id = (SELECT site_id FROM site WHERE site_name = {siteName})",
Values: []any{
sq.StringParam("siteName", strings.TrimPrefix(sitePrefix, "@")),
},
})
if err != nil {
nbrew.GetLogger(r.Context()).Error(err.Error())
nbrew.InternalServerError(w, r, err)
return
}
if exists {
response.Error = "ExportLimitReached"
writeResponse(w, r, response)
return
}
}
var totalBytes atomic.Int64
outputDirsToExport := make(map[string]exportAction)
group, groupctx := errgroup.WithContext(r.Context())
if response.ExportParent {
group.Go(func() (err error) {
defer stacktrace.RecoverPanic(&err)
size, err := exportDirSize(r.Context(), nbrew.FS.WithContext(r.Context()), sitePrefix, response.Parent)
if err != nil {
return err
}
totalBytes.Add(size)
return nil
})
if head == "pages" {
if tail == "" {
outputDir := "output"
outputDirsToExport[outputDir] = exportFiles | exportDirectories
} else {
outputDir := path.Join("output", tail)
outputDirsToExport[outputDir] = exportDirectories
}
} else if head == "posts" {
outputDir := path.Join("output/posts", tail)
outputDirsToExport[outputDir] = exportFiles | exportDirectories
}
} else {
response.Files = make([]File, len(names))
for i, name := range names {
i, name := i, name
if name == "" {
continue
}
fileInfo, err := fs.Stat(nbrew.FS.WithContext(groupctx), path.Join(sitePrefix, response.Parent, name))
if err != nil {
if errors.Is(err, fs.ErrNotExist) {
continue
}
nbrew.GetLogger(r.Context()).Error(err.Error())
nbrew.InternalServerError(w, r, err)
return
}
file := File{
Name: fileInfo.Name(),
IsDir: fileInfo.IsDir(),
Size: fileInfo.Size(),
ModTime: fileInfo.ModTime(),
}
if databaseFileInfo, ok := fileInfo.(*DatabaseFileInfo); ok {
file.FileID = databaseFileInfo.FileID
file.CreationTime = databaseFileInfo.CreationTime
} else {
var absolutePath string
switch v := nbrew.FS.(type) {
case interface{ As(any) bool }:
var directoryFS *DirectoryFS
if v.As(&directoryFS) {
absolutePath = path.Join(directoryFS.RootDir, sitePrefix, response.Parent, name)
}
}
file.CreationTime = CreationTime(absolutePath, fileInfo)
}
response.Files[i] = file
if !fileInfo.IsDir() {
totalBytes.Add(fileInfo.Size())
} else {
group.Go(func() (err error) {
defer stacktrace.RecoverPanic(&err)
size, err := exportDirSize(r.Context(), nbrew.FS.WithContext(r.Context()), sitePrefix, path.Join(response.Parent, name))
if err != nil {
return err
}
totalBytes.Add(size)
return nil
})
}
if head == "pages" {
if file.IsDir {
outputDir := path.Join("output", tail, name)
outputDirsToExport[outputDir] |= exportDirectories
} else {
if tail == "" {
if name == "index.html" {
outputDir := "output"
outputDirsToExport[outputDir] |= exportFiles
} else {
outputDir := path.Join("output", strings.TrimSuffix(name, ".html"))
outputDirsToExport[outputDir] |= exportFiles
}
} else {
outputDir := path.Join("output", tail, strings.TrimSuffix(name, ".html"))
outputDirsToExport[outputDir] |= exportFiles
}
}
} else if head == "posts" {
if file.IsDir {
if tail == "" {
category := name
outputDir := path.Join("output/posts", category)
outputDirsToExport[outputDir] |= exportDirectories
}
} else {
if !strings.Contains(tail, "/") {
if strings.HasSuffix(name, ".md") {
outputDir := path.Join("output/posts", tail, strings.TrimSuffix(name, ".md"))
outputDirsToExport[outputDir] |= exportFiles
}
}
}
}
}
}
for outputDir, action := range outputDirsToExport {
outputDir, action := outputDir, action
fileInfo, err := fs.Stat(nbrew.FS.WithContext(r.Context()), path.Join(sitePrefix, outputDir))
if err != nil {
if !errors.Is(err, fs.ErrNotExist) {
delete(outputDirsToExport, outputDir)
continue
}
nbrew.GetLogger(r.Context()).Error(err.Error())
nbrew.InternalServerError(w, r, err)
return
} else {
if !fileInfo.IsDir() {
delete(outputDirsToExport, outputDir)
continue
}
}
group.Go(func() (err error) {
defer stacktrace.RecoverPanic(&err)
size, err := exportOutputDirSize(r.Context(), nbrew.FS.WithContext(r.Context()), sitePrefix, outputDir, action)
if err != nil {
return err
}
totalBytes.Add(size)
return nil
})
}
err = group.Wait()
if err != nil {
nbrew.GetLogger(r.Context()).Error(err.Error())
nbrew.InternalServerError(w, r, err)
return
}
response.TotalBytes = totalBytes.Load()
n := 0
for _, file := range response.Files {
if file.Name == "" {
continue
}
response.Files[n] = file
n++
}
response.Files = response.Files[:n]
writeResponse(w, r, response)
case "POST":
if user.DisableReason != "" {
nbrew.AccountDisabled(w, r, user.DisableReason)
return
}
writeResponse := func(w http.ResponseWriter, r *http.Request, response Response) {
if r.Form.Has("api") {
w.Header().Set("Content-Type", "application/json; charset=utf-8")
encoder := json.NewEncoder(w)
encoder.SetIndent("", " ")
encoder.SetEscapeHTML(false)
err := encoder.Encode(&response)
if err != nil {
nbrew.GetLogger(r.Context()).Error(err.Error())
}
return
}
if response.Error != "" {
err := nbrew.SetFlashSession(w, r, &response)
if err != nil {
nbrew.GetLogger(r.Context()).Error(err.Error())
nbrew.InternalServerError(w, r, err)
return
}
values := url.Values{
"parent": []string{response.Parent},
"name": response.Names,
}
http.Redirect(w, r, "/"+path.Join("files", sitePrefix, "export")+"/?"+values.Encode(), http.StatusFound)
return
}
err := nbrew.SetFlashSession(w, r, map[string]any{
"postRedirectGet": map[string]any{
"from": "export",
"tgzFileName": response.OutputName + ".tgz",
},
})
if err != nil {
nbrew.GetLogger(r.Context()).Error(err.Error())
nbrew.InternalServerError(w, r, err)
return
}
http.Redirect(w, r, "/"+path.Join("files", sitePrefix, "exports")+"/", http.StatusFound)
}
var request Request
r.Body = http.MaxBytesReader(w, r.Body, 1<<20 /* 1 MB */)
contentType, _, _ := mime.ParseMediaType(r.Header.Get("Content-Type"))
switch contentType {
case "application/json":
err := json.NewDecoder(r.Body).Decode(&request)
if err != nil {
nbrew.BadRequest(w, r, err)
return
}
case "application/x-www-form-urlencoded", "multipart/form-data":
if contentType == "multipart/form-data" {
err := r.ParseMultipartForm(1 << 20 /* 1 MB */)
if err != nil {
nbrew.BadRequest(w, r, err)
return
}
} else {
err := r.ParseForm()
if err != nil {
nbrew.BadRequest(w, r, err)
return
}
}
request.Parent = r.Form.Get("parent")
request.Names = r.Form["name"]
request.OutputName = r.Form.Get("outputName")
default:
nbrew.UnsupportedContentType(w, r)
return
}
response := Response{
Parent: path.Clean(strings.Trim(request.Parent, "/")),
Names: make([]string, 0, len(request.Names)),
OutputName: filenameSafe(request.OutputName),
FormErrors: url.Values{},
}
head, tail, _ := strings.Cut(response.Parent, "/")
switch head {
case ".":
response.ExportParent = true
case "notes", "pages", "posts", "output":
fileInfo, err := fs.Stat(nbrew.FS, path.Join(sitePrefix, response.Parent))
if err != nil {
if errors.Is(err, fs.ErrNotExist) {
response.Error = "InvalidParent"
writeResponse(w, r, response)
return
}
nbrew.GetLogger(r.Context()).Error(err.Error())
nbrew.InternalServerError(w, r, err)
return
}
if !fileInfo.IsDir() {
response.Error = "InvalidParent"
writeResponse(w, r, response)
return
}
if len(request.Names) == 0 {
response.ExportParent = true
} else {
seen := make(map[string]bool)
for _, name := range request.Names {
name := filepath.ToSlash(name)
if strings.Contains(name, "/") {
continue
}
if seen[name] {
continue
}
seen[name] = true
response.Names = append(response.Names, name)
}
}
default:
response.Error = "InvalidParent"
writeResponse(w, r, response)
return
}
startTime := time.Now().UTC()
if response.OutputName == "" {
response.OutputName = "files-" + strings.ReplaceAll(startTime.Format("2006-01-02-150405.999"), ".", "-")
}
tgzFileName := response.OutputName + ".tgz"
_, err := fs.Stat(nbrew.FS.WithContext(r.Context()), path.Join(sitePrefix, "exports", tgzFileName))
if err != nil {
if !errors.Is(err, fs.ErrNotExist) {
nbrew.GetLogger(r.Context()).Error(err.Error())
nbrew.InternalServerError(w, r, err)
return
}
} else {
response.FormErrors.Add("outputName", "file name already exists")
writeResponse(w, r, response)
return
}
var totalBytes atomic.Int64
var filePaths []string
outputDirsToExport := make(map[string]exportAction)
group, groupctx := errgroup.WithContext(r.Context())
if response.ExportParent {
group.Go(func() (err error) {
defer stacktrace.RecoverPanic(&err)
size, err := exportDirSize(r.Context(), nbrew.FS.WithContext(r.Context()), sitePrefix, response.Parent)
if err != nil {
return err
}
totalBytes.Add(size)
return nil
})
filePaths = []string{response.Parent}
if head == "pages" {
if tail == "" {
outputDir := "output"
outputDirsToExport[outputDir] = exportFiles | exportDirectories
} else {
outputDir := path.Join("output", tail)
outputDirsToExport[outputDir] = exportDirectories
}
} else if head == "posts" {
outputDir := path.Join("output/posts", tail)
outputDirsToExport[outputDir] = exportFiles | exportDirectories
}
} else {
for _, name := range response.Names {
name := name
if name == "" {
continue
}
fileInfo, err := fs.Stat(nbrew.FS.WithContext(groupctx), path.Join(sitePrefix, response.Parent, name))
if err != nil {
if errors.Is(err, fs.ErrNotExist) {
continue
}
nbrew.GetLogger(r.Context()).Error(err.Error())
nbrew.InternalServerError(w, r, err)
return
}
filePaths = append(filePaths, path.Join(response.Parent, name))
isDir := fileInfo.IsDir()
if !isDir {
totalBytes.Add(fileInfo.Size())
} else {
group.Go(func() (err error) {
defer stacktrace.RecoverPanic(&err)
size, err := exportDirSize(r.Context(), nbrew.FS.WithContext(r.Context()), sitePrefix, path.Join(response.Parent, name))
if err != nil {
return err
}
totalBytes.Add(size)
return nil
})
}
if head == "pages" {
if isDir {
outputDir := path.Join("output", tail, name)
outputDirsToExport[outputDir] |= exportDirectories
} else {
if tail == "" {
if name == "index.html" {
outputDir := "output"
outputDirsToExport[outputDir] |= exportFiles
} else {
outputDir := path.Join("output", strings.TrimSuffix(name, ".html"))
outputDirsToExport[outputDir] |= exportFiles
}
} else {
outputDir := path.Join("output", tail, strings.TrimSuffix(name, ".html"))
outputDirsToExport[outputDir] |= exportFiles
}
}
} else if head == "posts" {
if isDir {
if tail == "" {
category := name
outputDir := path.Join("output/posts", category)
outputDirsToExport[outputDir] |= exportDirectories
}
} else {
if !strings.Contains(tail, "/") {
if strings.HasSuffix(name, ".md") {
outputDir := path.Join("output/posts", tail, strings.TrimSuffix(name, ".md"))
outputDirsToExport[outputDir] |= exportFiles
}
}
}
}
}
}
for outputDir, action := range outputDirsToExport {
outputDir, action := outputDir, action
fileInfo, err := fs.Stat(nbrew.FS.WithContext(r.Context()), path.Join(sitePrefix, outputDir))
if err != nil {
if !errors.Is(err, fs.ErrNotExist) {
delete(outputDirsToExport, outputDir)
continue
}
nbrew.GetLogger(r.Context()).Error(err.Error())
nbrew.InternalServerError(w, r, err)
return
} else {
if !fileInfo.IsDir() {
delete(outputDirsToExport, outputDir)
continue
}
}
group.Go(func() (err error) {
defer stacktrace.RecoverPanic(&err)
size, err := exportOutputDirSize(r.Context(), nbrew.FS.WithContext(r.Context()), sitePrefix, outputDir, action)
if err != nil {
return err
}
totalBytes.Add(size)
return nil
})
}
err = group.Wait()
if err != nil {
nbrew.GetLogger(r.Context()).Error(err.Error())
nbrew.InternalServerError(w, r, err)
return
}
response.TotalBytes = totalBytes.Load()
var storageRemaining *atomic.Int64
var isDatabaseFS bool
switch v := nbrew.FS.(type) {
case interface{ As(any) bool }:
isDatabaseFS = v.As(&DatabaseFS{})
}
if nbrew.DB != nil && isDatabaseFS && user.StorageLimit >= 0 {
storageUsed, err := sq.FetchOne(r.Context(), nbrew.DB, sq.Query{
Dialect: nbrew.Dialect,
Format: "SELECT {*}" +
" FROM site" +
" JOIN site_owner ON site_owner.site_id = site.site_id" +
" WHERE site_owner.user_id = {userID}",
Values: []any{
sq.UUIDParam("userID", user.UserID),
},
}, func(row *sq.Row) int64 {
return row.Int64("sum(CASE WHEN site.storage_used IS NOT NULL AND site.storage_used > 0 THEN site.storage_used ELSE 0 END)")
})
if err != nil {
nbrew.GetLogger(r.Context()).Error(err.Error())
nbrew.InternalServerError(w, r, err)
return
}
storageRemaining = &atomic.Int64{}
storageRemaining.Store(user.StorageLimit - storageUsed)
}
// 1. prepare the row to be inserted
// 2. attempt to acquire a slot (insert the row)
// 3. if insertion fails with KeyViolation, then report to user that a job is already running
if nbrew.DB == nil {
err := nbrew.exportTgz(r.Context(), ID{}, sitePrefix, filePaths, outputDirsToExport, tgzFileName, storageRemaining)
if err != nil {
nbrew.GetLogger(r.Context()).Error(err.Error())
nbrew.InternalServerError(w, r, err)
return
}
} else {
exportJobID := NewID()
_, err := sq.Exec(r.Context(), nbrew.DB, sq.Query{
Dialect: nbrew.Dialect,
Format: "INSERT INTO export_job (export_job_id, site_id, tgz_file_name, start_time, total_bytes)" +
" VALUES ({exportJobID}, (SELECT site_id FROM site WHERE site_name = {siteName}), {tgzFileName}, {startTime}, {totalBytes})",
Values: []any{
sq.UUIDParam("exportJobID", exportJobID),
sq.StringParam("siteName", strings.TrimPrefix(sitePrefix, "@")),
sq.StringParam("tgzFileName", tgzFileName),
sq.TimeParam("startTime", startTime),
sq.Int64Param("totalBytes", response.TotalBytes),
},
})
if err != nil {
if nbrew.ErrorCode != nil {
errorCode := nbrew.ErrorCode(err)
if IsKeyViolation(nbrew.Dialect, errorCode) {
response.Error = "ExportLimitReached"
writeResponse(w, r, response)
return
}
}
nbrew.GetLogger(r.Context()).Error(err.Error())
nbrew.InternalServerError(w, r, err)
return
}
nbrew.BaseCtxWaitGroup.Add(1)
logger := nbrew.GetLogger(r.Context())
requestURL := r.Method + " " + r.Host + r.URL.RequestURI()
go func() {
defer func() {
if v := recover(); v != nil {
fmt.Println(stacktrace.New(fmt.Errorf("panic: %s: %v", requestURL, v)))
}
}()
defer nbrew.BaseCtxWaitGroup.Done()
err := nbrew.exportTgz(nbrew.BaseCtx, exportJobID, sitePrefix, filePaths, outputDirsToExport, tgzFileName, storageRemaining)
if err != nil {
logger.Error(err.Error(),
slog.String("exportJobID", exportJobID.String()),
slog.String("sitePrefix", sitePrefix),
slog.String("filePaths", strings.Join(filePaths, "|")),
slog.String("tgzFileName", tgzFileName),
)
}
}()
}
writeResponse(w, r, response)
default:
nbrew.MethodNotAllowed(w, r)
}
}
func (nbrew *Notebrew) exportTgz(ctx context.Context, exportJobID ID, sitePrefix string, filePaths []string, outputDirsToExport map[string]exportAction, tgzFileName string, storageRemaining *atomic.Int64) error {
success := false
defer func() {
if nbrew.DB == nil {
return
}
_, err := sq.Exec(context.Background(), nbrew.DB, sq.Query{
Dialect: nbrew.Dialect,
Format: "DELETE FROM export_job WHERE export_job_id = {exportJobID}",
Values: []any{
sq.UUIDParam("exportJobID", exportJobID),
},
})
if err != nil {
nbrew.Logger.Error(err.Error())
}
if !success {
err := nbrew.FS.WithContext(context.Background()).Remove(path.Join(sitePrefix, "exports", tgzFileName))
if err != nil {
if !errors.Is(err, fs.ErrNotExist) {
nbrew.Logger.Error(err.Error())
}
}
}
}()
writerCtx, cancelWriter := context.WithCancel(ctx)
defer cancelWriter()
writer, err := nbrew.FS.WithContext(writerCtx).OpenWriter(path.Join(sitePrefix, "exports", tgzFileName), 0644)
if err != nil {
return stacktrace.New(err)
}
defer func() {
cancelWriter()
writer.Close()
}()
gzipWriter := gzipWriterPool.Get().(*gzip.Writer)
gzipWriter.Reset(writer)
defer func() {
gzipWriter.Close()
gzipWriter.Reset(io.Discard)
gzipWriterPool.Put(gzipWriter)
}()
var dest io.Writer
if nbrew.DB == nil {
dest = gzipWriter
} else {
var db sq.DB
if nbrew.Dialect == "sqlite" {
db = nbrew.DB
} else {
var conn *sql.Conn
conn, err = nbrew.DB.Conn(ctx)
if err != nil {
return err
}
defer conn.Close()
db = conn
}
preparedExec, err := sq.PrepareExec(ctx, db, sq.Query{
Dialect: nbrew.Dialect,
Format: "UPDATE export_job SET processed_bytes = {processedBytes} WHERE export_job_id = {exportJobID}",
Values: []any{
sq.Int64Param("processedBytes", 0),
sq.UUIDParam("exportJobID", exportJobID),
},
})
if err != nil {
return stacktrace.New(err)
}
defer preparedExec.Close()
dest = &exportProgressWriter{
ctx: writerCtx,
writer: gzipWriter,
preparedExec: preparedExec,
processedBytes: 0,
storageRemaining: storageRemaining,
}
}
tarWriter := tar.NewWriter(dest)
defer tarWriter.Close()
outputDirs := make([]string, 0, len(outputDirsToExport))
for outputDir := range outputDirsToExport {
outputDirs = append(outputDirs, outputDir)
}
slices.Sort(outputDirs)
databaseFS, ok := &DatabaseFS{}, false
switch v := nbrew.FS.(type) {
case interface{ As(any) bool }:
ok = v.As(&databaseFS)
}
if ok {
type File struct {
FileID ID
FilePath string
IsDir bool
Size int64
ModTime time.Time
CreationTime time.Time
Bytes []byte
IsPinned bool
}
buf := bufPool.Get().(*bytes.Buffer).Bytes()
defer func() {
if cap(buf) <= maxPoolableBufferCapacity {
buf = buf[:0]
bufPool.Put(bytes.NewBuffer(buf))
}
}()
gzipReader, _ := gzipReaderPool.Get().(*gzip.Reader)
defer func() {
if gzipReader != nil {
gzipReader.Reset(bytes.NewReader(nil))
gzipReaderPool.Put(gzipReader)
}
}()
for _, filePath := range filePaths {
if filePath == "." {
err := exportDir(ctx, tarWriter, nbrew.FS.WithContext(ctx), sitePrefix, ".")
if err != nil {
return stacktrace.New(err)
}
continue
}
file, err := sq.FetchOne(ctx, databaseFS.DB, sq.Query{
Dialect: databaseFS.Dialect,
Format: "SELECT {*}" +
" FROM files" +
" LEFT JOIN pinned_file ON pinned_file.parent_id = files.parent_id AND pinned_file.file_id = files.file_id" +
" WHERE file_path = {filePath}",
Values: []any{
sq.Param("filePath", path.Join(sitePrefix, filePath)),
},
}, func(row *sq.Row) (file File) {
buf = row.Bytes(buf[:0], "COALESCE(files.text, files.data)")
file.FileID = row.UUID("files.file_id")
file.FilePath = strings.TrimPrefix(strings.TrimPrefix(row.String("files.file_path"), sitePrefix), "/")
file.IsDir = row.Bool("files.is_dir")
file.Size = row.Int64("files.size")
file.Bytes = buf
file.ModTime = row.Time("files.mod_time")
file.CreationTime = row.Time("files.creation_time")
file.IsPinned = row.Bool("pinned_file.file_id IS NOT NULL")
return file
})
if err != nil {
if errors.Is(err, sql.ErrNoRows) {
continue
}
return stacktrace.New(err)
}
tarHeader := &tar.Header{
Name: file.FilePath,
ModTime: file.ModTime,
Size: file.Size,
PAXRecords: map[string]string{
"NOTEBREW.file.modTime": file.ModTime.UTC().Format("2006-01-02T15:04:05Z"),
"NOTEBREW.file.creationTime": file.CreationTime.UTC().Format("2006-01-02T15:04:05Z"),
},
}
if file.IsPinned {
tarHeader.PAXRecords["NOTEBREW.file.isPinned"] = "true"
}
if file.IsDir {
tarHeader.Typeflag = tar.TypeDir
tarHeader.Mode = 0755
err = tarWriter.WriteHeader(tarHeader)
if err != nil {
return stacktrace.New(err)
}
err = exportDir(ctx, tarWriter, databaseFS.WithContext(ctx), sitePrefix, filePath)
if err != nil {
return stacktrace.New(err)
}
continue
}
fileType, ok := AllowedFileTypes[path.Ext(file.FilePath)]
if !ok {
continue
}
if fileType.Has(AttributeImg) && len(file.Bytes) > 0 && utf8.Valid(file.Bytes) {
tarHeader.PAXRecords["NOTEBREW.file.caption"] = string(file.Bytes)
}
tarHeader.Typeflag = tar.TypeReg
tarHeader.Mode = 0644
err = tarWriter.WriteHeader(tarHeader)
if err != nil {
return stacktrace.New(err)
}
if fileType.Has(AttributeObject) {
reader, err := databaseFS.ObjectStorage.Get(ctx, file.FileID.String()+path.Ext(file.FilePath))
if err != nil {
return stacktrace.New(err)
}
_, err = io.Copy(tarWriter, reader)
if err != nil {
reader.Close()
return stacktrace.New(err)
}
err = reader.Close()
if err != nil {
return stacktrace.New(err)
}
} else {
if fileType.Has(AttributeGzippable) && !IsFulltextIndexed(file.FilePath) {
if gzipReader == nil {
gzipReader, err = gzip.NewReader(bytes.NewReader(file.Bytes))
if err != nil {
return stacktrace.New(err)
}
} else {
err = gzipReader.Reset(bytes.NewReader(file.Bytes))
if err != nil {
return stacktrace.New(err)
}
}
_, err = io.Copy(tarWriter, gzipReader)
if err != nil {
return stacktrace.New(err)
}
} else {
_, err = io.Copy(tarWriter, bytes.NewReader(file.Bytes))
if err != nil {
return stacktrace.New(err)
}
}
}
}
for _, outputDir := range outputDirs {
file, err := sq.FetchOne(ctx, databaseFS.DB, sq.Query{
Dialect: databaseFS.Dialect,
Format: "SELECT {*}" +
" FROM files" +
" LEFT JOIN pinned_file ON pinned_file.parent_id = files.parent_id AND pinned_file.file_id = files.file_id" +
" WHERE file_path = {outputDir}" +
" AND is_dir",
Values: []any{
sq.Param("outputDir", path.Join(sitePrefix, outputDir)),
},
}, func(row *sq.Row) (file File) {
file.FileID = row.UUID("files.file_id")
file.FilePath = strings.TrimPrefix(strings.TrimPrefix(row.String("files.file_path"), sitePrefix), "/")
file.IsDir = row.Bool("files.is_dir")
file.Size = row.Int64("files.size")
file.ModTime = row.Time("files.mod_time")
file.CreationTime = row.Time("files.creation_time")
file.IsPinned = row.Bool("pinned_file.file_id IS NOT NULL")
return file
})
if err != nil {
if errors.Is(err, sql.ErrNoRows) {
continue
}
return stacktrace.New(err)
}
tarHeader := &tar.Header{
Typeflag: tar.TypeDir,
Mode: 0755,
Name: file.FilePath,
ModTime: file.ModTime,
PAXRecords: map[string]string{
"NOTEBREW.file.modTime": file.ModTime.UTC().Format("2006-01-02T15:04:05Z"),
"NOTEBREW.file.creationTime": file.CreationTime.UTC().Format("2006-01-02T15:04:05Z"),
},
}
if file.IsPinned {
tarHeader.PAXRecords["NOTEBREW.file.isPinned"] = "true"
}
err = tarWriter.WriteHeader(tarHeader)
if err != nil {
return stacktrace.New(err)
}
action := outputDirsToExport[outputDir]
err = exportOutputDir(ctx, tarWriter, databaseFS.WithContext(ctx), sitePrefix, outputDir, action)
if err != nil {
return stacktrace.New(err)
}
}
} else {
for _, filePath := range filePaths {
if filePath == "." {
err := exportDir(ctx, tarWriter, nbrew.FS.WithContext(ctx), sitePrefix, ".")
if err != nil {
return stacktrace.New(err)
}