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refactor postgres connection string building (#27723) (#27869)

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Backport #27723 by @mpldr

This patchset changes the connection string builder to use net.URL and
the host/port parser to use the stdlib function for splitting host from
port. It also adds a footnote about a potentially required portnumber
for postgres UNIX sockets.

Fixes: #24552

Co-authored-by: Moritz Poldrack <33086936+mpldr@users.noreply.github.com>
This commit is contained in:
Giteabot 2023-11-02 07:19:02 +08:00 • committed by GitHub
parent 39596115da
commit c074af6a6d
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GPG key ID: 4AEE18F83AFDEB23
3 changed files with 47 additions and 30 deletions
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40
modules/setting/database.go
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@ -6,6 +6,7 @@ package setting
import (
"errors"
"fmt"
"net"
"net/url"
"os"
"path"
@ -135,15 +136,18 @@ func DBConnStr() (string, error) {
// parsePostgreSQLHostPort parses given input in various forms defined in
// https://www.postgresql.org/docs/current/static/libpq-connect.html#LIBPQ-CONNSTRING
// and returns proper host and port number.
func parsePostgreSQLHostPort(info string) (string, string) {
host, port := "127.0.0.1", "5432"
if strings.Contains(info, ":") && !strings.HasSuffix(info, "]") {
idx := strings.LastIndex(info, ":")
host = info[:idx]
port = info[idx+1:]
} else if len(info) > 0 {
func parsePostgreSQLHostPort(info string) (host, port string) {
if h, p, err := net.SplitHostPort(info); err == nil {
host, port = h, p
} else {
// treat the "info" as "host", if it's an IPv6 address, remove the wrapper
host = info
if strings.HasPrefix(host, "[") && strings.HasSuffix(host, "]") {
host = host[1 : len(host)-1]
}
}
// set fallback values
if host == "" {
host = "127.0.0.1"
}
@ -155,14 +159,22 @@ func parsePostgreSQLHostPort(info string) (string, string) {
func getPostgreSQLConnectionString(dbHost, dbUser, dbPasswd, dbName, dbParam, dbsslMode string) (connStr string) {
host, port := parsePostgreSQLHostPort(dbHost)
if host[0] == '/' { // looks like a unix socket
connStr = fmt.Sprintf("postgres://%s:%s@:%s/%s%ssslmode=%s&host=%s",
url.PathEscape(dbUser), url.PathEscape(dbPasswd), port, dbName, dbParam, dbsslMode, host)
} else {
connStr = fmt.Sprintf("postgres://%s:%s@%s:%s/%s%ssslmode=%s",
url.PathEscape(dbUser), url.PathEscape(dbPasswd), host, port, dbName, dbParam, dbsslMode)
connURL := url.URL{
Scheme: "postgres",
User: url.UserPassword(dbUser, dbPasswd),
Host: net.JoinHostPort(host, port),
Path: dbName,
OmitHost: false,
RawQuery: dbParam,
}
return connStr
query := connURL.Query()
if dbHost[0] == '/' { // looks like a unix socket
query.Add("host", dbHost)
connURL.Host = ":" + port
}
query.Set("sslmode", dbsslMode)
connURL.RawQuery = query.Encode()
return connURL.String()
}
// ParseMSSQLHostPort splits the host into host and port