fix quoted headers

unmarshal.go

@@ -288,6 +288,8 @@ func (d *Decoder) Decode(v interface{}) error {
 // Decoder state required to map CSV records later on.
 func (d *Decoder) DecodeHeader(line string) ([]string, error) {
 	d.headerKeys = strings.Split(line, string(d.sep))
+	d.headerKeys = maybeTrimQuotes(d.headerKeys)
+
 	if len(d.headerKeys) == 0 {
 		return nil, fmt.Errorf("csv: empty header")
 	}
@@ -560,3 +562,17 @@ func setValue(dst reflect.Value, src, fName string) error {
 	}
 	return nil
 }
+
+func maybeTrimQuotes(tokens []string) []string {
+	trimmed := make([]string, 0, len(tokens))
+	for _, s := range tokens {
+		if len(s) > 0 && s[0] == '"' {
+			s = s[1:]
+		}
+		if len(s) > 0 && s[len(s)-1] == '"' {
+		    s = s[:len(s)-1]
+		}
+		trimmed = append(trimmed, s)
+	}
+	return trimmed
+}

unmarshal_test.go

@@ -78,6 +78,8 @@ func (x SpecialStruct) String() string {
 
 const (
 	CsvWithHeader = `s,i,f,b
+Hello,42,23.45,true`
+	CsvWithQuotedHeader = `"s","i","f","b"
 Hello,42,23.45,true`
 	CsvWithoutHeader = `Hello,true,42,23.45`
 	CsvWhitespace    = `  Hello  ,  true   ,  42  ,  23.45`
@@ -275,6 +277,18 @@ func TestUnmarshalFromByte(t *testing.T) {
 	CheckA(t, a[0], A1)
 }
 
+func TestUnmarshalQuotedFromByte(t *testing.T) {
+	a := make([]*A, 0)
+	if err := Unmarshal([]byte(CsvWithQuotedHeader), &a); err != nil {
+		t.Error(err)
+	}
+	if len(a) != 1 {
+		t.Errorf("invalid record count, got=%d expected=%d", len(a), 1)
+		return
+	}
+	CheckA(t, a[0], A1)
+}
+
 func TestUnmarshalFromReader(t *testing.T) {
 	r := bytes.NewReader([]byte(CsvWithHeader))
 	dec := NewDecoder(r)