change the JS MIME to text/javascript instead of application/javascript as https://github.com/golang/go/issues/32351

Former-commit-id: 761be7901fff65ef0ca6e3ea4339ff59f569cf75

HISTORY.md

@@ -206,6 +206,8 @@ New Context Methods:
 - `context.IsGRPC() bool` reports whether the request came from a gRPC client
 - `context.UpsertCookie(*http.Cookie, cookieOptions ...context.CookieOption)` upserts a cookie, fixes [#1485](https://github.com/kataras/iris/issues/1485) too
 - `context.StopWithStatus(int)` stops the handlers chain and writes the status code
+- `context.StopWithText(int, string)` stops the handlers chain, writes thre status code and a plain text message
+- `context.StopWithError(int, error)` stops the handlers chain, writes thre status code and the error's message
 - `context.StopWithJSON(int, interface{})` stops the handlers chain, writes the status code and sends a JSON response
 - `context.StopWithProblem(int, iris.Problem)` stops the handlers, writes the status code and sends an `application/problem+json` response
 - `context.Protobuf(proto.Message)` sends protobuf to the client
@@ -220,6 +222,8 @@ New Context Methods:
 
 Breaking Changes:
 
+Change the MIME type of `Javascript .js` and `JSONP` as the HTML specification now recommends to `"text/javascript"` instead of the obselete `"application/javascript"`. This change was pushed to the `Go` language itself as well. See <https://go-review.googlesource.com/c/go/+/186927/>.
+
 - `var mvc.AutoBinding` removed as the default behavior now resolves such dependencies automatically (see [[FEATURE REQUEST] MVC serving gRPC-compatible controller](https://github.com/kataras/iris/issues/1449))
 - `mvc#Application.SortByNumMethods()` removed as the default behavior now binds the "thinnest"  empty `interface{}` automatically (see [MVC: service injecting fails](https://github.com/kataras/iris/issues/1343))
 - `mvc#BeforeActivation.Dependencies().Add` should be replaced with `mvc#BeforeActivation.Dependencies().Register` instead

_examples/file-server/basic/main_test.go

@@ -16,7 +16,7 @@ type resource string
 func (r resource) contentType() string {
 	switch filepath.Ext(r.String()) {
 	case ".js":
-		return "application/javascript"
+		return "text/javascript"
 	case ".css":
 		return "text/css"
 	case ".ico":

_examples/file-server/embedding-files-into-app/main_test.go

@@ -18,7 +18,7 @@ type resource string
 func (r resource) contentType() string {
 	switch filepath.Ext(r.String()) {
 	case ".js":
-		return "application/javascript"
+		return "text/javascript"
 	case ".css":
 		return "text/css"
 	case ".ico":

_examples/file-server/embedding-gziped-files-into-app/main_test.go

@@ -20,7 +20,7 @@ type resource string
 func (r resource) contentType() string {
 	switch filepath.Ext(r.String()) {
 	case ".js":
-		return "application/javascript"
+		return "text/javascript"
 	case ".css":
 		return "text/css"
 	case ".ico":

_examples/file-server/single-page-application/embedded-single-page-application/main_test.go

@@ -15,7 +15,7 @@ type resource string
 func (r resource) contentType() string {
 	switch filepath.Ext(r.String()) {
 	case ".js":
-		return "application/javascript"
+		return "text/javascript"
 	case ".css":
 		return "text/css"
 	default:

_examples/file-server/subdomain/main_test.go

@@ -14,7 +14,7 @@ type resource string
 func (r resource) contentType() string {
 	switch filepath.Ext(r.String()) {
 	case ".js":
-		return "application/javascript"
+		return "text/javascript"
 	case ".css":
 		return "text/css"
 	case ".ico":

_examples/http_responsewriter/content-negotiation/main.go

@@ -97,7 +97,7 @@ func newApp() *iris.Application {
 			// Markdown: for text/mardown,
 			// Binary: for application/octet-stream,
 			// YAML: for application/x-yaml,
-			// JSONP: for application/javascript
+			// JSONP: for text/javascript
 			// Other: for anything else,
 			JSON: jsonAndXML,                          // for application/json
 			XML:  jsonAndXML,                          // for application/xml or text/xml

_examples/http_responsewriter/write-rest/main.go

@@ -49,7 +49,7 @@ func main() {
 			Age:       25,
 		}
 
-		// Manually setting a content type: ctx.ContentType("application/javascript")
+		// Manually setting a content type: ctx.ContentType("text/javascript")
 		ctx.JSON(u)
 	})
 

context/context.go

@@ -256,11 +256,23 @@ type Context interface {
 	// IsStopped reports whether the current position of the context's handlers is -1,
 	// means that the StopExecution() was called at least once.
 	IsStopped() bool
-	// StopWithJSON stops the handlers chain and writes the "statusCode".
+	// StopWithStatus stops the handlers chain and writes the "statusCode".
 	//
 	// If the status code is a failure one then
 	// it will also fire the specified error code handler.
 	StopWithStatus(statusCode int)
+	// StopWithText stops the handlers chain and writes the "statusCode"
+	// among with a message "plainText".
+	//
+	// If the status code is a failure one then
+	// it will also fire the specified error code handler.
+	StopWithText(statusCode int, plainText string)
+	// StopWithError stops the handlers chain and writes the "statusCode"
+	// among with the error "err".
+	//
+	// If the status code is a failure one then
+	// it will also fire the specified error code handler.
+	StopWithError(statusCode int, err error)
 	// StopWithJSON stops the handlers chain, writes the status code
 	// and sends a JSON response.
 	//
@@ -1496,7 +1508,7 @@ func (ctx *context) IsStopped() bool {
 	return ctx.currentHandlerIndex == stopExecutionIndex
 }
 
-// StopWithJSON stops the handlers chain and writes the "statusCode".
+// StopWithStatus stops the handlers chain and writes the "statusCode".
 //
 // If the status code is a failure one then
 // it will also fire the specified error code handler.
@@ -1505,6 +1517,30 @@ func (ctx *context) StopWithStatus(statusCode int) {
 	ctx.StatusCode(statusCode)
 }
 
+// StopWithText stops the handlers chain and writes the "statusCode"
+// among with a message "plainText".
+//
+// If the status code is a failure one then
+// it will also fire the specified error code handler.
+func (ctx *context) StopWithText(statusCode int, plainText string) {
+	ctx.WriteString(plainText)
+	ctx.StopWithStatus(statusCode)
+}
+
+// StopWithError stops the handlers chain and writes the "statusCode"
+// among with the error "err".
+//
+// If the status code is a failure one then
+// it will also fire the specified error code handler.
+func (ctx *context) StopWithError(statusCode int, err error) {
+	if err == nil {
+		return
+	}
+
+	ctx.WriteString(err.Error())
+	ctx.StopWithStatus(statusCode)
+}
+
 // StopWithJSON stops the handlers chain, writes the status code
 // and sends a JSON response.
 //
@@ -3311,7 +3347,7 @@ const (
 	// Read more at: https://tools.ietf.org/html/rfc7807
 	ContentXMLProblemHeaderValue = "application/problem+xml"
 	// ContentJavascriptHeaderValue header value for JSONP & Javascript data.
-	ContentJavascriptHeaderValue = "application/javascript"
+	ContentJavascriptHeaderValue = "text/javascript"
 	// ContentTextHeaderValue header value for Text data.
 	ContentTextHeaderValue = "text/plain"
 	// ContentXMLHeaderValue header value for XML data.
@@ -4160,9 +4196,9 @@ func (n *NegotiationBuilder) Problem(v ...interface{}) *NegotiationBuilder {
 	return n.MIME(ContentJSONProblemHeaderValue+","+ContentXMLProblemHeaderValue, content)
 }
 
-// JSONP registers the "application/javascript" content type and, optionally,
+// JSONP registers the "text/javascript" content type and, optionally,
 // a value that `Context.Negotiate` will render
-// when a client accepts the "application/javascript" content type.
+// when a client accepts the "javascript/javascript" content type.
 //
 // Returns itself for recursive calls.
 func (n *NegotiationBuilder) JSONP(v ...interface{}) *NegotiationBuilder {
@@ -4446,7 +4482,7 @@ func (n *NegotiationAcceptBuilder) Problem() *NegotiationAcceptBuilder {
 	return n.MIME(ContentJSONProblemHeaderValue, ContentXMLProblemHeaderValue)
 }
 
-// JSONP adds the "application/javascript" as accepted client content type.
+// JSONP adds the "text/javascript" as accepted client content type.
 // Returns itself.
 func (n *NegotiationAcceptBuilder) JSONP() *NegotiationAcceptBuilder {
 	return n.MIME(ContentJavascriptHeaderValue)

core/router/handler.go

@@ -174,7 +174,7 @@ func (h *routerHandler) Build(provider RoutesProvider) error {
 		defer golog.SetTimeFormat(bckpTimeFormat)
 		golog.SetTimeFormat("")
 
-		for _, method := range AllMethods {
+		for _, method := range AllMethods { // TODO: MethodNone "NONE" with an (offline) status on r.Trace.
 			methodRoutes := collect(method)
 			for _, r := range methodRoutes {
 				golog.Println(r.Trace())

core/router/mime.go

@@ -3,6 +3,8 @@ package router
 import (
 	"mime"
 	"path/filepath"
+
+	"github.com/kataras/iris/v12/context"
 )
 
 var types = map[string]string{
@@ -47,7 +49,7 @@ var types = map[string]string{
 	".bsh":       "application/x-bsh",
 	".bz2":       "application/x-bzip2",
 	".bz":        "application/x-bzip",
-	".c++":       "text/plain",
+	".c++":       context.ContentTextHeaderValue,
 	".c":         "text/x-c",
 	".cab":       "application/vnd.ms-cab-compressed",
 	".cat":       "application/vndms-pkiseccat",
@@ -60,8 +62,8 @@ var types = map[string]string{
 	".chat":      "application/x-chat",
 	".chrt":      "application/vnd.kde.kchart",
 	".class":     "application/java",
-	".com":       "text/plain",
+	".com":       context.ContentTextHeaderValue,
-	".conf":      "text/plain",
+	".conf":      context.ContentTextHeaderValue,
 	".cpio":      "application/x-cpio",
 	".cpp":       "text/x-c",
 	".cpt":       "application/mac-compactpro",
@@ -71,12 +73,12 @@ var types = map[string]string{
 	".csh":       "text/x-scriptcsh",
 	".css":       "text/css",
 	".csv":       "text/csv",
-	".cxx":       "text/plain",
+	".cxx":       context.ContentTextHeaderValue,
 	".dar":       "application/x-dar",
 	".dcr":       "application/x-director",
 	".deb":       "application/x-debian-package",
 	".deepv":     "application/x-deepv",
-	".def":       "text/plain",
+	".def":       context.ContentTextHeaderValue,
 	".der":       "application/x-x509-ca-cert",
 	".dif":       "video/x-dv",
 	".dir":       "application/x-director",
@@ -118,7 +120,7 @@ var types = map[string]string{
 	".frl":       "application/freeloader",
 	".funk":      "audio/make",
 	".g3":        "image/g3fax",
-	".g":         "text/plain",
+	".g":         context.ContentTextHeaderValue,
 	".gif":       "image/gif",
 	".gl":        "video/gl",
 	".gsd":       "audio/x-gsm",
@@ -149,7 +151,7 @@ var types = map[string]string{
 	".ico":       "image/x-icon",
 	".ics":       "text/calendar",
 	".icz":       "text/calendar",
-	".idc":       "text/plain",
+	".idc":       context.ContentTextHeaderValue,
 	".ief":       "image/ief",
 	".iefs":      "image/ief",
 	".iges":      "application/iges",
@@ -175,8 +177,9 @@ var types = map[string]string{
 	".jpeg":      "image/jpeg",
 	".jpg":       "image/jpeg",
 	".jps":       "image/x-jps",
-	".js":        "application/javascript",
+	".js":        context.ContentJavascriptHeaderValue,
-	".json":      "application/json",
+	".mjs":       context.ContentJavascriptHeaderValue,
+	".json":      context.ContentJSONHeaderValue,
 	".jut":       "image/jutvision",
 	".kar":       "audio/midi",
 	".karbon":    "application/vnd.kde.karbon",
@@ -196,11 +199,11 @@ var types = map[string]string{
 	".latex":     "application/x-latex",
 	".lha":       "application/lha",
 	".lhx":       "application/octet-stream",
-	".list":      "text/plain",
+	".list":      context.ContentTextHeaderValue,
 	".lma":       "audio/nspaudio",
-	".log":       "text/plain",
+	".log":       context.ContentTextHeaderValue,
 	".lsp":       "text/x-scriptlisp",
-	".lst":       "text/plain",
+	".lst":       context.ContentTextHeaderValue,
 	".lsx":       "text/x-la-asf",
 	".ltx":       "application/x-latex",
 	".lzh":       "application/octet-stream",
@@ -213,7 +216,7 @@ var types = map[string]string{
 	".man":       "application/x-troff-man",
 	".manifest":  "text/cache-manifest",
 	".map":       "application/x-navimap",
-	".mar":       "text/plain",
+	".mar":       context.ContentTextHeaderValue,
 	".mbd":       "application/mbedlet",
 	".mc$":       "application/x-magic-cap-package-10",
 	".mcd":       "application/mcad",
@@ -366,7 +369,7 @@ var types = map[string]string{
 	".saveme":    "application/octet-stream",
 	".sbk":       "application/x-tbook",
 	".scm":       "text/x-scriptscheme",
-	".sdml":      "text/plain",
+	".sdml":      context.ContentTextHeaderValue,
 	".sdp":       "application/sdp",
 	".sdr":       "application/sounder",
 	".sea":       "application/sea",
@@ -415,7 +418,7 @@ var types = map[string]string{
 	".tex":       "application/x-tex",
 	".texi":      "application/x-texinfo",
 	".texinfo":   "application/x-texinfo",
-	".text":      "text/plain",
+	".text":      context.ContentTextHeaderValue,
 	".tgz":       "application/gnutar",
 	".tif":       "image/tiff",
 	".tiff":      "image/tiff",
@@ -424,7 +427,7 @@ var types = map[string]string{
 	".tsp":       "application/dsptype",
 	".tsv":       "text/tab-separated-values",
 	".turbot":    "image/florian",
-	".txt":       "text/plain",
+	".txt":       context.ContentTextHeaderValue,
 	".uil":       "text/x-uil",
 	".uni":       "text/uri-list",
 	".unis":      "text/uri-list",
@@ -500,7 +503,7 @@ var types = map[string]string{
 	".xlv":       "application/excel",
 	".xlw":       "application/excel",
 	".xm":        "audio/xm",
-	".xml":       "text/xml",
+	".xml":       context.ContentXMLHeaderValue,
 	".xmz":       "xgl/movie",
 	".xpix":      "application/x-vndls-xpix",
 	".xpm":       "image/x-xpixmap",
@@ -569,22 +572,21 @@ func TypeByExtension(ext string) (typ string) {
 	}
 
 	if ext[0] != '.' { // try to take it by filename
-		typ = TypeByFilename(ext)
+		typ = context.TrimHeaderValue(TypeByFilename(ext))
 		if typ == "" {
 			ext = "." + ext // if error or something wrong then prepend the dot
 		}
 	}
 
 	if typ == "" {
-		typ = mime.TypeByExtension(ext)
+		typ = context.TrimHeaderValue(mime.TypeByExtension(ext))
 	}
 
 	// mime.TypeByExtension returns as text/plain; | charset=utf-8 the static .js (not always)
-	if ext == ".js" && (typ == "text/plain" || typ == "text/plain; charset=utf-8") {
+	if ext == ".js" && (typ == context.ContentJavascriptHeaderValue || typ == context.ContentTextHeaderValue) {
-		if ext == ".js" {
+		typ = context.ContentJavascriptHeaderValue
-			typ = "application/javascript"
-		}
 	}
+
 	return typ
 }