Golang上的基於標頭的版本控制是一種在開發過程中管理程式碼版本的有效方法。透過在程式碼檔案的開頭添加版本信息,開發人員可以輕鬆追蹤程式碼的變更和版本歷史。這種版本控制方法不僅簡單易用,也適用於各種規模的專案。 php小編西瓜將在本文中詳細介紹Golang上基於標頭的版本控制的使用方法和注意事項,幫助開發人員更好地管理和維護程式碼。無論你是初學者還是有經驗的開發者,本文都將為你提供有價值的參考和指導。讓我們一起來探索這個有趣又實用的版本控制技術吧!
我想使用 gin 在 go 上實作基於標頭的版本控制。我正在考慮使用中間件功能在路由器上執行此操作。
客戶端將呼叫相同的 api url,並且版本將位於自訂 http 標頭中,如下所示:
呼叫版本1 取得/用戶/12345678 接受版本:v1
呼叫版本 2: 取得/用戶/12345678 接受版本:v2
因此,路由器可以識別標頭並呼叫特定版本。像這樣的事情:
router := gin.Default() v1 := router.Group("/v1") v1.Use(VersionMiddleware()) v1.GET("/user/:id", func(c *gin.Context) { c.String(http.StatusOK, "This is the v1 API") }) v2 := router.Group("/v2") v2.Use(VersionMiddleware()) v2.GET("/user/:id", func(c *gin.Context) { c.String(http.StatusOK, "This is the v2 API") }) func VersionMiddleware() gin.HandlerFunc { return func(c *gin.Context) { version := c.Request.Header.Get(configuration.GetConfigValue("VersionHeader")) // Construct the new URL path based on the version number path := fmt.Sprintf("/%s%s", version, c.Request.URL.Path) // Modify the request URL path to point to the new version-specific endpoint c.Request.URL.Path = path c.Next() } }
請檢查下面的程式碼片段。我使用 reverseproxy 重定向到給定的版本。您需要仔細驗證給定的版本。否則會導致遞歸呼叫。
注意:我使用了兩個版本的/user
get(/v1/user
和/v2/user
) 。
package main import ( "net/http" "net/http/httputil" "regexp" "github.com/gin-gonic/gin" ) func main() { router := gin.default() router.use(versionmiddleware()) v1 := router.group("/v1") v1.get("/user", func(c *gin.context) { c.string(http.statusok, "this is the v1 api") }) v2 := router.group("/v2") v2.get("/user", func(c *gin.context) { c.string(http.statusok, "this is the v2 api") }) router.run(":8082") } func versionmiddleware() gin.handlerfunc { return func(c *gin.context) { // you need to check c.request.url.path whether // already have a version or not, if it has a valid // version, return. regex, _ := regexp.compile("/v[0-9]+") ver := regex.matchstring(c.request.url.path) if ver { return } version := c.request.header.get("accept-version") // you need to validate given version by the user here. // if version is not a valid version, return error // mentioning that given version is invalid. director := func(req *http.request) { r := c.request req.url.scheme = "http" req.url.host = r.host req.url.path = "/"+ version + r.url.path } proxy := &httputil.reverseproxy{director: director} proxy.servehttp(c.writer, c.request) } }
您可以使用下面的杜松子酒包裝實現。
package main import ( "net/http" "github.com/gin-gonic/gin" "github.com/udayangaac/stackoverflow/golang/75860989/ginwrapper" ) func main() { engine := gin.default() router := ginwrapper.newrouter(engine) defaultrouter := router.default() defaultrouter.get("/profile",func(ctx *gin.context) { }) v1 := router.withversion("/v1") v1.get("/user",func(ctx *gin.context) { ctx.string(http.statusok, "this is the profile v1 api") }) v2 := router.withversion("/v2") v2.get("/user",func(ctx *gin.context) { ctx.string(http.statusok, "this is the profile v2 api") }) engine.run(":8082") }
package ginwrapper import ( "fmt" "net/http" "github.com/gin-gonic/gin" ) type router struct { router *gin.engine versiongroups map[string]*gin.routergroup } type versionedrouter struct { version string router } func newrouter(router *gin.engine) *router { return &router{ router: router, versiongroups: make(map[string]*gin.routergroup), } } func (a *router) default() versionedrouter { return versionedrouter{router: *a } } func (a *router) withversion(version string) versionedrouter { if _,ok := a.versiongroups[version]; ok { panic("cannot initialize same version multiple times") } a.versiongroups[version] = a.router.group(version) return versionedrouter{router: *a,version:version } } func (vr versionedrouter) get(relativepath string, handlers ...gin.handlerfunc) { vr.handle(http.methodget,relativepath,handlers...) } // note: you need to follow the same for other http methods. // as an example, we can write a method for post http method as below, // // func (vr versionedrouter) post(relativepath string, handlers ...gin.handlerfunc) { // vr.handle(http.methodpost,relativepath,handlers...) // } func (vr versionedrouter)handle(method,relativepath string, handlers ...gin.handlerfunc) { if !vr.isrouteexist(method,relativepath) { vr.router.handle(method,relativepath,func(ctx *gin.context) { version := ctx.request.header.get("accept-version") if len(version) == 0 { ctx.string(http.statusbadrequest,"accept-version header is empty") } ctx.request.url.path = fmt.sprintf("/%s%s", version, ctx.request.url.path) vr.router.handlecontext(ctx) }) } versionedrelativepath := vr.version + relativepath if !vr.isrouteexist(method,versionedrelativepath) { vr.router.handle(method,versionedrelativepath,handlers... ) } } func (a versionedrouter) isrouteexist(method,relativepath string) bool { for _,route := range a.router.routes() { if route.method == method && relativepath == route.path { return true } } return false }
/v1/user
curl --location 'localhost:8082/user' \ --header 'accept-version: v1'
/v2/user
curl --location 'localhost:8082/user' \ --header 'Accept-version: v2'
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