Add a method to mobile bindings that allows to dump content of the logs files (#1402)

exportlogs/logs.go

@@ -0,0 +1,34 @@
+package exportlogs
+
+import (
+	"fmt"
+	"io/ioutil"
+
+	"github.com/status-im/go-ethereum/common/hexutil"
+)
+
+// Log contains actual log content and filename. If content is gzipped Compressed will be set to true.
+type Log struct {
+	Filename   string
+	Content    []byte
+	Compressed bool
+}
+
+// ExportResponse contains all available logs
+type ExportResponse struct {
+	Error string
+	Logs  []Log
+}
+
+// ExportFromBaseFile reads log file and returns its content with some meta.
+// In future can be extended to dump rotated logs.
+func ExportFromBaseFile(logFile string) ExportResponse {
+	data, err := ioutil.ReadFile(logFile)
+	if err != nil {
+		return ExportResponse{Error: fmt.Errorf("error reading file %s: %v", logFile, err).Error()}
+	}
+	return ExportResponse{Logs: []Log{
+		{Filename: logFile, Compressed: false, Content: hexutil.Bytes(data)},
+	}}
+
+}

exportlogs/logs_test.go

@@ -0,0 +1,30 @@
+package exportlogs
+
+import (
+	"fmt"
+	"io/ioutil"
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestExportLogs(t *testing.T) {
+	tempf, err := ioutil.TempFile("", "test-dump-logs")
+	require.NoError(t, err)
+	logs := "first line\nsecond line\n"
+	n, err := fmt.Fprintf(tempf, logs)
+	require.NoError(t, err)
+	require.Equal(t, len(logs), n)
+	response := ExportFromBaseFile(tempf.Name())
+	require.Empty(t, response.Error)
+	require.Len(t, response.Logs, 1)
+	log := response.Logs[0]
+	require.Equal(t, false, log.Compressed)
+	require.Equal(t, tempf.Name(), log.Filename)
+	require.Equal(t, logs, string(log.Content))
+}
+
+func TestExportLogsNoFileError(t *testing.T) {
+	response := ExportFromBaseFile("doesnt-exist")
+	require.Equal(t, "error reading file doesnt-exist: open doesnt-exist: no such file or directory", response.Error)
+}

lib/library.go

@@ -5,6 +5,7 @@ import "C"
 import (
 	"encoding/hex"
 	"encoding/json"
+	"errors"
 	"fmt"
 	"os"
 	"unsafe"
@@ -12,6 +13,7 @@ import (
 	"github.com/ethereum/go-ethereum/common"
 	"github.com/ethereum/go-ethereum/log"
 	"github.com/status-im/status-go/api"
+	"github.com/status-im/status-go/exportlogs"
 	"github.com/status-im/status-go/logutils"
 	"github.com/status-im/status-go/params"
 	"github.com/status-im/status-go/profiling"
@@ -591,3 +593,21 @@ func AppStateChange(state *C.char) {
 func SetSignalEventCallback(cb unsafe.Pointer) {
 	signal.SetSignalEventCallback(cb)
 }
+
+// ExportNodeLogs reads current node log and returns content to a caller.
+//export ExportNodeLogs
+func ExportNodeLogs() *C.char {
+	node := statusBackend.StatusNode()
+	if node == nil {
+		return makeJSONResponse(errors.New("node is not running"))
+	}
+	config := node.Config()
+	if config == nil {
+		return makeJSONResponse(errors.New("config and log file are not available"))
+	}
+	data, err := json.Marshal(exportlogs.ExportFromBaseFile(config.LogFile))
+	if err != nil {
+		return makeJSONResponse(fmt.Errorf("error marshalling to json: %v", err))
+	}
+	return C.CString(string(data))
+}

mobile/status.go

@@ -3,6 +3,7 @@ package statusgo
 import (
 	"encoding/hex"
 	"encoding/json"
+	"errors"
 	"fmt"
 	"os"
 	"unsafe"
@@ -10,6 +11,7 @@ import (
 	"github.com/ethereum/go-ethereum/common"
 	"github.com/ethereum/go-ethereum/log"
 	"github.com/status-im/status-go/api"
+	"github.com/status-im/status-go/exportlogs"
 	"github.com/status-im/status-go/logutils"
 	"github.com/status-im/status-go/params"
 	"github.com/status-im/status-go/profiling"
@@ -584,3 +586,21 @@ func GetContactCode(identity string) string {
 
 	return string(data)
 }
+
+// ExportNodeLogs reads current node log and returns content to a caller.
+//export ExportNodeLogs
+func ExportNodeLogs() string {
+	node := statusBackend.StatusNode()
+	if node == nil {
+		return makeJSONResponse(errors.New("node is not running"))
+	}
+	config := node.Config()
+	if config == nil {
+		return makeJSONResponse(errors.New("config and log file are not available"))
+	}
+	data, err := json.Marshal(exportlogs.ExportFromBaseFile(config.LogFile))
+	if err != nil {
+		return makeJSONResponse(fmt.Errorf("error marshalling to json: %v", err))
+	}
+	return string(data)
+}