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|
package export
import (
"context"
"errors"
"fmt"
"io"
"log"
"net/http"
"os"
"path"
"time"
"git.sr.ht/~emersion/gqlclient"
"git.sr.ht/~xenrox/hut/srht/listssrht"
)
const archiveFilename = "archive.mbox"
type ListsExporter struct {
client *gqlclient.Client
http *http.Client
}
func NewListsExporter(client *gqlclient.Client, http *http.Client) *ListsExporter {
newHttp := *http
// XXX: Is this a sane default? Maybe large lists or slow
// connections could require more. Would be nice to ensure a
// constant flow of data rather than ensuring the entire request is
// complete within a deadline. Would also be nice to use range
// headers to be able to resume this on failure or interruption.
newHttp.Timeout = 10 * time.Minute
return &ListsExporter{
client: client,
http: &newHttp,
}
}
// A subset of listssrht.MailingList which only contains the fields we want to
// export (i.e. the ones filled in by the GraphQL query)
type MailingListInfo struct {
Info
Description *string `json:"description"`
Visibility listssrht.Visibility `json:"visibility"`
PermitMime []string `json:"permitMime"`
RejectMime []string `json:"rejectMime"`
}
func (ex *ListsExporter) Export(ctx context.Context, dir string) error {
var cursor *listssrht.Cursor
var ret error
for {
user, err := listssrht.ExportMailingLists(ex.client, ctx, cursor)
if err != nil {
return err
}
for _, list := range user.Lists.Results {
base := path.Join(dir, list.Name)
if err := os.MkdirAll(base, 0o755); err != nil {
return err
}
if err := ex.exportList(ctx, &list, base); err != nil {
var pe partialError
if errors.As(err, &pe) {
ret = err
continue
}
return err
}
}
cursor = user.Lists.Cursor
if cursor == nil {
break
}
}
return ret
}
func (ex *ListsExporter) ExportResource(ctx context.Context, dir, owner, resource string) error {
user, err := listssrht.ExportMailingList(ex.client, ctx, owner, resource)
if err != nil {
return err
}
return ex.exportList(ctx, user.List, dir)
}
func (ex *ListsExporter) exportList(ctx context.Context, list *listssrht.MailingList, base string) error {
infoPath := path.Join(base, infoFilename)
if _, err := os.Stat(infoPath); err == nil {
log.Printf("\tSkipping %s (already exists)", list.Name)
return nil
}
log.Printf("\t%s", list.Name)
req, err := http.NewRequestWithContext(ctx, http.MethodGet,
string(list.Archive), nil)
if err != nil {
return err
}
resp, err := ex.http.Do(req)
if err != nil {
return err
}
defer resp.Body.Close()
if resp.StatusCode != http.StatusOK {
return partialError{fmt.Errorf("%s: server returned non-200 status %d",
list.Name, resp.StatusCode)}
}
archive, err := os.Create(path.Join(base, archiveFilename))
if err != nil {
return err
}
defer archive.Close()
if _, err := io.Copy(archive, resp.Body); err != nil {
return err
}
listInfo := MailingListInfo{
Info: Info{
Service: "lists.sr.ht",
Name: list.Name,
},
Description: list.Description,
Visibility: list.Visibility,
PermitMime: list.PermitMime,
RejectMime: list.RejectMime,
}
if err := writeJSON(infoPath, &listInfo); err != nil {
return err
}
return nil
}
func (ex *ListsExporter) ImportResource(ctx context.Context, dir string) error {
var info MailingListInfo
if err := readJSON(path.Join(dir, infoFilename), &info); err != nil {
return err
}
return ex.importList(ctx, &info, dir)
}
func (ex *ListsExporter) importList(ctx context.Context, list *MailingListInfo, base string) error {
l, err := listssrht.CreateMailingList(ex.client, ctx, list.Name, list.Description, list.Visibility)
if err != nil {
return fmt.Errorf("failed to create mailing list: %v", err)
}
if _, err := listssrht.UpdateMailingList(ex.client, ctx, l.Id, listssrht.MailingListInput{
PermitMime: list.PermitMime,
RejectMime: list.RejectMime,
}); err != nil {
return fmt.Errorf("failed to update mailing list: %v", err)
}
archive, err := os.Open(path.Join(base, archiveFilename))
if err != nil {
return err
}
defer archive.Close()
if _, err := listssrht.ImportMailingListSpool(ex.client, ctx, l.Id, gqlclient.Upload{
Filename: archiveFilename,
MIMEType: "application/mbox",
Body: archive,
}); err != nil {
return fmt.Errorf("failed to import mailing list emails: %v", err)
}
return nil
}
|
