From 851352bc8a6782e6827de28fd54ff92bcb206485 Mon Sep 17 00:00:00 2001 From: Daniel Nelson Date: Wed, 23 Aug 2017 15:17:26 -0700 Subject: [PATCH] Escape backslash within string fields (#3161) (cherry picked from commit ae24a0754bd4c250c268fe67de9510860e66ef0e) --- metric/escape.go | 10 ++++-- metric/metric.go | 8 +---- metric/metric_test.go | 7 +--- metric/reader_test.go | 78 +++++++++++++++++++++++++++++++++++++++++++ 4 files changed, 88 insertions(+), 15 deletions(-) diff --git a/metric/escape.go b/metric/escape.go index a717f514d..cb040b7f2 100644 --- a/metric/escape.go +++ b/metric/escape.go @@ -20,8 +20,14 @@ var ( // stringFieldEscaper is for escaping string field values only. // see https://docs.influxdata.com/influxdb/v1.0/write_protocols/line_protocol_tutorial/#special-characters-and-keywords - stringFieldEscaper = strings.NewReplacer(`"`, `\"`) - stringFieldUnEscaper = strings.NewReplacer(`\"`, `"`) + stringFieldEscaper = strings.NewReplacer( + `"`, `\"`, + `\`, `\\`, + ) + stringFieldUnEscaper = strings.NewReplacer( + `\"`, `"`, + `\\`, `\`, + ) ) func escape(s string, t string) string { diff --git a/metric/metric.go b/metric/metric.go index dd2d6cbc0..63e609290 100644 --- a/metric/metric.go +++ b/metric/metric.go @@ -77,16 +77,10 @@ func New( // pre-allocate capacity of the fields slice fieldlen := 0 - for k, v := range fields { + for k, _ := range fields { if strings.HasSuffix(k, `\`) { return nil, fmt.Errorf("Metric cannot have field key ending with a backslash") } - switch val := v.(type) { - case string: - if strings.HasSuffix(val, `\`) { - return nil, fmt.Errorf("Metric cannot have field value ending with a backslash") - } - } // 10 bytes is completely arbitrary, but will at least prevent some // amount of allocations. There's a small possibility this will create diff --git a/metric/metric_test.go b/metric/metric_test.go index e875a213f..b1a23e6df 100644 --- a/metric/metric_test.go +++ b/metric/metric_test.go @@ -257,6 +257,7 @@ func TestNewMetric_Fields(t *testing.T) { "string": "test", "quote_string": `x"y`, "backslash_quote_string": `x\"y`, + "backslash": `x\y`, } m, err := New("cpu", tags, fields, now) assert.NoError(t, err) @@ -708,12 +709,6 @@ func TestNewMetric_TrailingSlash(t *testing.T) { `value\`: "x", }, }, - { - name: "cpu", - fields: map[string]interface{}{ - "value": `x\`, - }, - }, { name: "cpu", tags: map[string]string{ diff --git a/metric/reader_test.go b/metric/reader_test.go index 1537fc960..645b618eb 100644 --- a/metric/reader_test.go +++ b/metric/reader_test.go @@ -4,6 +4,7 @@ import ( "io" "io/ioutil" "regexp" + "strings" "testing" "time" @@ -620,6 +621,83 @@ func TestMetricReader_SplitMetricChangingBuffer2(t *testing.T) { } } +func TestReader_Read(t *testing.T) { + epoch := time.Unix(0, 0) + + type args struct { + name string + tags map[string]string + fields map[string]interface{} + t time.Time + mType []telegraf.ValueType + } + tests := []struct { + name string + args args + expected []byte + }{ + { + name: "escape backslashes in string field", + args: args{ + name: "cpu", + tags: map[string]string{}, + fields: map[string]interface{}{"value": `test\`}, + t: epoch, + }, + expected: []byte(`cpu value="test\\" 0`), + }, + { + name: "escape quote in string field", + args: args{ + name: "cpu", + tags: map[string]string{}, + fields: map[string]interface{}{"value": `test"`}, + t: epoch, + }, + expected: []byte(`cpu value="test\"" 0`), + }, + { + name: "escape quote and backslash in string field", + args: args{ + name: "cpu", + tags: map[string]string{}, + fields: map[string]interface{}{"value": `test\"`}, + t: epoch, + }, + expected: []byte(`cpu value="test\\\"" 0`), + }, + { + name: "escape multiple backslash in string field", + args: args{ + name: "cpu", + tags: map[string]string{}, + fields: map[string]interface{}{"value": `test\\`}, + t: epoch, + }, + expected: []byte(`cpu value="test\\\\" 0`), + }, + } + + for _, tt := range tests { + t.Run(tt.name, func(t *testing.T) { + buf := make([]byte, 512) + m, err := New(tt.args.name, tt.args.tags, tt.args.fields, tt.args.t, tt.args.mType...) + require.NoError(t, err) + + r := NewReader([]telegraf.Metric{m}) + num, err := r.Read(buf) + if err != io.EOF { + require.NoError(t, err) + } + line := string(buf[:num]) + // This is done so that we can use raw strings in the test spec + noeol := strings.TrimRight(line, "\n") + require.Equal(t, string(tt.expected), noeol) + require.Equal(t, len(tt.expected)+1, num) + }) + } +} + func TestMetricRoundtrip(t *testing.T) { const lp = `nstat,bu=linux,cls=server,dc=cer,env=production,host=hostname,name=netstat,sr=database 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