refactor(签名): 签名功能单独例到一个文件

cdn.go

@@ -1,12 +1,7 @@
 package cdn
 
 import (
-	"net/url"
-	"path"
-
-	"github.com/goexl/exc"
 	"github.com/goexl/gox"
-	"github.com/goexl/gox/field"
 )
 
 // CDN 客户端
@@ -21,46 +16,3 @@ func newCDN(params *params) *CDN {
 		params: params,
 	}
 }
-
-func (c *CDN) Sign(from string) (encoded *url.URL, err error) {
-	if parsed, pe := url.Parse(from); nil != pe {
-		err = pe
-	} else if sign, ee := c.lookupSigner(parsed.Host); nil != ee {
-		err = ee
-	} else {
-		err = sign.sign(parsed)
-	}
-
-	return
-}
-
-func (c *CDN) lookupSigner(host string) (signer signer, err error) {
-	if cached, ok := c.signers[host]; ok {
-		signer = cached
-	} else {
-		signer, err = c.matchSigner(host)
-	}
-
-	return
-}
-
-func (c *CDN) matchSigner(host string) (signer signer, err error) {
-	for domain, value := range c.params.signers {
-		if matched, me := path.Match(domain, host); nil == me && matched {
-			signer = value
-		}
-		if nil != signer {
-			break
-		}
-	}
-	if nil == signer {
-		signer = c.params.signers[defaults]
-	}
-	if nil != signer {
-		c.signers[host] = signer
-	} else {
-		err = exc.NewField("没有匹配到域名", field.New("domains", c.params.signers))
-	}
-
-	return
-}

cdn_sign.go

@@ -0,0 +1,52 @@
+package cdn
+
+import (
+	"net/url"
+	"path"
+
+	"github.com/goexl/exc"
+	"github.com/goexl/gox/field"
+)
+
+func (c *CDN) Sign(from string) (encoded *url.URL, err error) {
+	if parsed, pe := url.Parse(from); nil != pe {
+		err = pe
+	} else if sign, ee := c.lookupSigner(parsed.Host); nil != ee {
+		err = ee
+	} else {
+		err = sign.sign(parsed)
+	}
+
+	return
+}
+
+func (c *CDN) lookupSigner(host string) (signer signer, err error) {
+	if cached, ok := c.signers[host]; ok {
+		signer = cached
+	} else {
+		signer, err = c.matchSigner(host)
+	}
+
+	return
+}
+
+func (c *CDN) matchSigner(host string) (signer signer, err error) {
+	for domain, value := range c.params.signers {
+		if matched, me := path.Match(domain, host); nil == me && matched {
+			signer = value
+		}
+		if nil != signer {
+			break
+		}
+	}
+	if nil == signer {
+		signer = c.params.signers[defaults]
+	}
+	if nil != signer {
+		c.signers[host] = signer
+	} else {
+		err = exc.NewField("没有匹配到域名", field.New("domains", c.params.signers))
+	}
+
+	return
+}