feat(s3): add Content-Disposition header (#365)

* add(s3): add Content-Disposition header

* Update driver.go

Signed-off-by: XZB-1248 <28593573+XZB-1248@users.noreply.github.com>

* Update driver.go

Signed-off-by: XZB-1248 <28593573+XZB-1248@users.noreply.github.com>

---------

Signed-off-by: XZB-1248 <28593573+XZB-1248@users.noreply.github.com>
Co-authored-by: XZB-1248 <i@1248.ink>
Co-authored-by: Suyunjing <69945917+Suyunmeng@users.noreply.github.com>

pkg/utils/http.go

@@ -0,0 +1,43 @@
+package utils
+
+import (
+	"fmt"
+	"net/url"
+	"strings"
+)
+
+// GenerateContentDisposition 生成符合RFC 5987标准的Content-Disposition头部
+func GenerateContentDisposition(fileName string) string {
+	// 按照RFC 2047进行编码，用于filename部分
+	encodedName := urlEncode(fileName)
+
+	// 按照RFC 5987进行编码，用于filename*部分
+	encodedNameRFC5987 := encodeRFC5987(fileName)
+
+	return fmt.Sprintf("attachment; filename=\"%s\"; filename*=utf-8''%s",
+		encodedName, encodedNameRFC5987)
+}
+
+// encodeRFC5987 按照RFC 5987规范编码字符串，适用于HTTP头部参数中的非ASCII字符
+func encodeRFC5987(s string) string {
+	var buf strings.Builder
+	for _, r := range []byte(s) {
+		// 根据RFC 5987，只有字母、数字和部分特殊符号可以不编码
+		if (r >= 'a' && r <= 'z') ||
+			(r >= 'A' && r <= 'Z') ||
+			(r >= '0' && r <= '9') ||
+			r == '-' || r == '.' || r == '_' || r == '~' {
+			buf.WriteByte(r)
+		} else {
+			// 其他字符都需要百分号编码
+			fmt.Fprintf(&buf, "%%%02X", r)
+		}
+	}
+	return buf.String()
+}
+
+func urlEncode(s string) string {
+	s = url.QueryEscape(s)
+	s = strings.ReplaceAll(s, "+", "%20")
+	return s
+}