bridge

structural/bridge.md

@@ -0,0 +1,50 @@
+# Bridge Pattern
+Decouples an interface from its implementation so that the two can vary independently
+
+## Implementation
+
+```go
+
+// interface
+type Request interface {
+	HttpRequest() (*http.Request, error)
+}
+
+type Client struct {
+	Client *http.Client
+}
+
+func (c *Client) Query(req Request) (resp *http.Response, err error) {
+	httpreq,_:=req.HttpRequest()
+	resp, err = c.Client.Do(httpreq)
+	return
+}
+
+// implementation
+type BaiduRequest struct {
+}
+
+func (cdn *BaiduRequest) HttpRequest() (*http.Request,  error) {
+	return http.NewRequest("GET", "https://www.baidu.com", nil)
+}
+
+// implementation
+type Googleequest struct {
+}
+
+func (cdn *Googleequest) HttpRequest() (*http.Request, error) {
+	return http.NewRequest("GET", "https://www.google.com/?hl=zh-cn&gws_rd=ssl", nil)
+}
+```
+
+## Usage
+```go
+client := &Client{http.DefaultClient}
+
+baiduReq := &BaiduRequest{}
+fmt.Println(client.Query(baiduReq))
+
+googleReq := &Googleequest{}
+fmt.Println(client.Query(googleReq))
+```
+