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app/service/main/tv/internal/pkg/BUILD

@@ -0,0 +1,32 @@
+package(default_visibility = ["//visibility:public"])
+
+load(
+    "@io_bazel_rules_go//go:def.bzl",
+    "go_library",
+)
+
+go_library(
+    name = "go_default_library",
+    srcs = ["sign.go"],
+    importpath = "go-common/app/service/main/tv/internal/pkg",
+    tags = ["automanaged"],
+    visibility = ["//visibility:public"],
+    deps = [
+        "//library/log:go_default_library",
+        "//vendor/github.com/google/go-querystring/query:go_default_library",
+    ],
+)
+
+filegroup(
+    name = "package-srcs",
+    srcs = glob(["**"]),
+    tags = ["automanaged"],
+    visibility = ["//visibility:private"],
+)
+
+filegroup(
+    name = "all-srcs",
+    srcs = [":package-srcs"],
+    tags = ["automanaged"],
+    visibility = ["//visibility:public"],
+)

app/service/main/tv/internal/pkg/sign.go

@@ -0,0 +1,84 @@
+package pkg
+
+import (
+	"bytes"
+	"crypto/md5"
+	"encoding/hex"
+	"fmt"
+	"net/url"
+	"sort"
+	"strings"
+
+	"go-common/library/log"
+
+	"github.com/google/go-querystring/query"
+)
+
+const (
+	_sign = "sign"
+)
+
+// Signer.
+type Signer struct {
+	Key string
+}
+
+func (s *Signer) struct2Values(in interface{}) (out url.Values, err error) {
+	out, err = query.Values(in)
+	if err != nil {
+		return
+	}
+	out.Del(_sign)
+	return
+}
+
+func (s *Signer) encodeUrlValues(values url.Values) (res string) {
+	keys := make([]string, 0)
+	for key := range values {
+		keys = append(keys, key)
+	}
+	sort.Strings(keys)
+	kvSli := make([]string, 0)
+	for _, key := range keys {
+		kvStr := fmt.Sprintf("%s=%s", key, values.Get(key))
+		kvSli = append(kvSli, kvStr)
+	}
+	paramsStr := strings.Join(kvSli, "&")
+	return strings.ToLower(paramsStr) + "&key=" + s.Key
+}
+
+func (s *Signer) escapeStr(str string) (res string) {
+	return s.adapt(url.QueryEscape(str))
+}
+
+func (s *Signer) md5(str string) (res string) {
+	var (
+		buf bytes.Buffer
+	)
+	buf.WriteString(str)
+	hexMd5 := md5.Sum(buf.Bytes())
+	return strings.ToUpper(hex.EncodeToString(hexMd5[:]))
+}
+
+// Sign makes sign for yst request.
+func (s *Signer) Sign(in interface{}) (sign string, err error) {
+	var (
+		values url.Values
+	)
+	if values, err = s.struct2Values(in); err != nil {
+		log.Error("signer.struct2Values(%+v) err(%+v)", in, err)
+		return
+	}
+	encodedVals := s.encodeUrlValues(values)
+	escapedVals := s.escapeStr(encodedVals)
+	sign = s.md5(escapedVals)
+	log.Info("Signer.Sign(%+v) sign(%s)", in, sign)
+	return
+}
+
+// NOTE: 经核对，云视听只有 `*` 不需要转义
+func (s *Signer) adapt(str string) string {
+	res := str
+	res = strings.Replace(res, "%2A", "*", -1)
+	return res
+}