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package config
import (
"encoding/base64"
"fmt"
"sort"
"strconv"
"strings"
"github.com/mimecast/dtail/internal/lcontext"
"github.com/mimecast/dtail/internal/omode"
gossh "golang.org/x/crypto/ssh"
)
// Args is a helper struct to summarize common client arguments.
type Args struct {
lcontext.LContext
Arguments []string
ConfigFile string
ConnectionsPerCPU int
ControlTTYPath string
Discovery string
InteractiveQuery bool
LogDir string
Logger string
LogLevel string
LogPayload bool
Mode omode.Mode
NoAuthKey bool
NoColor bool
QueryStr string
Quiet bool
RegexInvert bool
RegexStr string
SSHAgentKeyIndex int
SSHAuthMethods []gossh.AuthMethod
SSHBindAddress string
SSHHostKeyCallback gossh.HostKeyCallback
SSHPort int
SSHPrivateKeyFilePath string
Serverless bool
ServersStr string
Plain bool
Timeout int
TrustAllHosts bool
UserName string
What string
}
func (a *Args) String() string {
var sb strings.Builder
sb.WriteString("Args(")
sb.WriteString(fmt.Sprintf("%s:%v,", "Arguments", a.Arguments))
sb.WriteString(fmt.Sprintf("%s:%v,", "ConfigFile", a.ConfigFile))
sb.WriteString(fmt.Sprintf("%s:%v,", "ConnectionsPerCPU", a.ConnectionsPerCPU))
sb.WriteString(fmt.Sprintf("%s:%v,", "ControlTTYPath", a.ControlTTYPath))
sb.WriteString(fmt.Sprintf("%s:%v,", "Discovery", a.Discovery))
sb.WriteString(fmt.Sprintf("%s:%v,", "InteractiveQuery", a.InteractiveQuery))
sb.WriteString(fmt.Sprintf("%s:%v,", "LogDir", a.LogDir))
sb.WriteString(fmt.Sprintf("%s:%v,", "LogLevel", a.LogLevel))
sb.WriteString(fmt.Sprintf("%s:%v,", "LogPayload", a.LogPayload))
sb.WriteString(fmt.Sprintf("%s:%v,", "Logger", a.Logger))
sb.WriteString(fmt.Sprintf("%s:%v,", "Mode", a.Mode))
sb.WriteString(fmt.Sprintf("%s:%v,", "NoAuthKey", a.NoAuthKey))
sb.WriteString(fmt.Sprintf("%s:%v,", "NoColor", a.NoColor))
sb.WriteString(fmt.Sprintf("%s:%v,", "QueryStr", a.QueryStr))
sb.WriteString(fmt.Sprintf("%s:%v,", "Quiet", a.Quiet))
sb.WriteString(fmt.Sprintf("%s:%v,", "RegexInvert", a.RegexInvert))
sb.WriteString(fmt.Sprintf("%s:%v,", "RegexStr", a.RegexStr))
sb.WriteString(fmt.Sprintf("%s:%v,", "SSHAgentKeyIndex", a.SSHAgentKeyIndex))
sb.WriteString(fmt.Sprintf("%s:%v,", "SSHAuthMethods", a.SSHAuthMethods))
sb.WriteString(fmt.Sprintf("%s:%v,", "SSHBindAddress", a.SSHBindAddress))
sb.WriteString(fmt.Sprintf("%s:%v,", "SSHHostKeyCallback", a.SSHHostKeyCallback))
sb.WriteString(fmt.Sprintf("%s:%v,", "SSHPrivateKeyFilePath", a.SSHPrivateKeyFilePath))
sb.WriteString(fmt.Sprintf("%s:%v,", "SSHPort", a.SSHPort))
sb.WriteString(fmt.Sprintf("%s:%v,", "Serverless", a.Serverless))
sb.WriteString(fmt.Sprintf("%s:%v,", "ServersStr", a.ServersStr))
sb.WriteString(fmt.Sprintf("%s:%v,", "Plain", a.Plain))
sb.WriteString(fmt.Sprintf("%s:%v,", "Timeout", a.Timeout))
sb.WriteString(fmt.Sprintf("%s:%v,", "TrustAllHosts", a.TrustAllHosts))
sb.WriteString(fmt.Sprintf("%s:%v,", "UserName", a.UserName))
sb.WriteString(fmt.Sprintf("%s:%v", "What", a.What))
sb.WriteString(")")
return sb.String()
}
// SerializeOptions returns a string ready to be sent over the wire to the server.
func (a *Args) SerializeOptions() string {
options := make(map[string]string)
if a.Quiet {
options["quiet"] = fmt.Sprintf("%v", a.Quiet)
}
if a.Plain {
options["plain"] = fmt.Sprintf("%v", a.Plain)
}
if a.Serverless {
options["serverless"] = fmt.Sprintf("%v", a.Serverless)
}
if a.LContext.MaxCount != 0 {
options["max"] = fmt.Sprintf("%d", a.LContext.MaxCount)
}
if a.LContext.BeforeContext != 0 {
options["before"] = fmt.Sprintf("%d", a.LContext.BeforeContext)
}
if a.LContext.AfterContext != 0 {
options["after"] = fmt.Sprintf("%d", a.LContext.AfterContext)
}
return serializeOptions(options)
}
func serializeOptions(options map[string]string) string {
if len(options) == 0 {
return ""
}
keys := make([]string, 0, len(options))
for k := range options {
keys = append(keys, k)
}
sort.Strings(keys)
var sb strings.Builder
for i, k := range keys {
if i > 0 {
sb.WriteString(":")
}
sb.WriteString(k)
sb.WriteString("=")
sb.WriteString(serializeOptionValue(options[k]))
}
return sb.String()
}
func serializeOptionValue(value string) string {
if strings.ContainsAny(value, ":=|") || strings.HasPrefix(value, "base64%") {
return "base64%" + base64.StdEncoding.EncodeToString([]byte(value))
}
return value
}
// DeserializeOptions deserializes the options, but into a map.
func DeserializeOptions(opts []string) (map[string]string, lcontext.LContext, error) {
options := make(map[string]string, len(opts))
var ltx lcontext.LContext
if len(opts) == 1 {
raw := strings.TrimSpace(opts[0])
if raw == "" {
return options, ltx, nil
}
opts = strings.Split(raw, ":")
}
for _, o := range opts {
kv := strings.SplitN(o, "=", 2)
if len(kv) != 2 {
return options, ltx, fmt.Errorf("Unable to parse options: %v", kv)
}
key := kv[0]
val := kv[1]
if strings.HasPrefix(val, "base64%") {
s := strings.SplitN(val, "%", 2)
decoded, err := base64.StdEncoding.DecodeString(s[1])
if err != nil {
return options, ltx, err
}
val = string(decoded)
}
var err error
if options, err = setOption(key, val, options, <x); err != nil {
return options, ltx, err
}
}
return options, ltx, nil
}
func setOption(key, val string, options map[string]string, ltx *lcontext.LContext) (map[string]string, error) {
switch key {
case "before":
iVal, err := strconv.Atoi(val)
if err != nil {
return options, err
}
ltx.BeforeContext = iVal
case "after":
iVal, err := strconv.Atoi(val)
if err != nil {
return options, err
}
ltx.AfterContext = iVal
case "max":
iVal, err := strconv.Atoi(val)
if err != nil {
return options, err
}
ltx.MaxCount = iVal
default:
options[key] = val
}
return options, nil
}
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