/
backup.go
169 lines (146 loc) · 4.11 KB
/
backup.go
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package main
import (
"bytes"
"crypto/tls"
"fmt"
"io"
"io/ioutil"
"net/http"
"net/url"
"github.com/mkideal/cli"
)
type backupResponse struct {
BackupFile []byte
}
type restoreResponse struct {
Results []*Result `json:"results"`
}
type sqliteStatus struct {
FkConstraint string `json:"fk_constraints"`
}
type store struct {
SqliteStatus sqliteStatus `json:"sqlite3"`
}
type statusResponse struct {
Store *store `json:"store"`
}
func makeBackupRequest(urlStr string) (*http.Request, error) {
req, err := http.NewRequest("GET", urlStr, nil)
if err != nil {
return nil, err
}
return req, nil
}
func backup(ctx *cli.Context, filename string, argv *argT) error {
queryStr := url.Values{}
u := url.URL{
Scheme: argv.Protocol,
Host: fmt.Sprintf("%s:%d", argv.Host, argv.Port),
Path: fmt.Sprintf("%sdb/backup", argv.Prefix),
RawQuery: queryStr.Encode(),
}
response, err := sendRequest(ctx, makeBackupRequest, u.String(), argv)
if err != nil {
return err
}
err = ioutil.WriteFile(filename, *response, 0644)
if err != nil {
return err
}
ctx.String("backup file written successfully\n")
return nil
}
func dump(ctx *cli.Context, filename string, argv *argT) error {
queryStr := url.Values{}
queryStr.Set("fmt", "sql")
u := url.URL{
Scheme: argv.Protocol,
Host: fmt.Sprintf("%s:%d", argv.Host, argv.Port),
Path: fmt.Sprintf("%sdb/backup", argv.Prefix),
RawQuery: queryStr.Encode(),
}
response, err := sendRequest(ctx, makeBackupRequest, u.String(), argv)
if err != nil {
return err
}
err = ioutil.WriteFile(filename, *response, 0644)
if err != nil {
return err
}
ctx.String("SQL text file written successfully\n")
return nil
}
func makeRestoreRequest(restoreFile io.Reader) func(string) (*http.Request, error) {
return func(urlStr string) (*http.Request, error) {
req, err := http.NewRequest("POST", urlStr, restoreFile)
req.Header["Content-type"] = []string{"text/plain"}
if err != nil {
return nil, err
}
return req, nil
}
}
func restore(ctx *cli.Context, filename string, argv *argT) error {
statusURL := fmt.Sprintf("%s://%s:%d/status", argv.Protocol, argv.Host, argv.Port)
client := http.Client{Transport: &http.Transport{
Proxy: http.ProxyFromEnvironment,
TLSClientConfig: &tls.Config{InsecureSkipVerify: argv.Insecure},
}}
statusResp, err := client.Get(statusURL)
if err != nil {
return err
}
defer statusResp.Body.Close()
if statusResp.StatusCode == http.StatusUnauthorized {
return fmt.Errorf("unauthorized")
}
body, err := ioutil.ReadAll(statusResp.Body)
if err != nil {
return err
}
statusRet := &statusResponse{}
if err := parseResponse(&body, &statusRet); err != nil {
return err
}
if statusRet.Store == nil {
return fmt.Errorf("unexpected server response: store status not found")
}
restoreFile, err := ioutil.ReadFile(filename)
if err != nil {
return err
}
// It is cheaper to append the actual pragma command to the restore file
fkEnabled := statusRet.Store.SqliteStatus.FkConstraint == "enabled"
if fkEnabled {
restoreFile = append(restoreFile, []byte("PRAGMA foreign_keys=ON;")...)
} else {
restoreFile = append(restoreFile, []byte("PRAGMA foreign_keys=OFF;")...)
}
queryStr := url.Values{}
restoreURL := url.URL{
Scheme: argv.Protocol,
Host: fmt.Sprintf("%s:%d", argv.Host, argv.Port),
Path: fmt.Sprintf("%sdb/load", argv.Prefix),
RawQuery: queryStr.Encode(),
}
restoreFileReader := bytes.NewReader(restoreFile)
response, err := sendRequest(ctx, makeRestoreRequest(restoreFileReader), restoreURL.String(), argv)
if err != nil {
return err
}
restoreRet := &restoreResponse{}
if err := parseResponse(response, &restoreRet); err != nil {
return err
}
if len(restoreRet.Results) < 1 {
return fmt.Errorf("unexpected results length: %d", len(restoreRet.Results))
}
if resultError := restoreRet.Results[0].Error; resultError != "" {
ctx.String("Error: %s\n", resultError)
return nil
}
ctx.String("last inserted ID: %d\n", restoreRet.Results[0].LastInsertID)
ctx.String("rows affected: %d\n", restoreRet.Results[0].RowsAffected)
ctx.String("database restored successfully\n")
return nil
}