add quicktemplate example. Iris + Quicktemplate made easy 👍

Former-commit-id: b17fb21d8c1d5a73f9f9170f49ae0527870377a1

_examples/README.md

@@ -121,6 +121,9 @@ Navigate through examples for a better understanding.
 - [Inject Data Between Handlers](view/context-view-data/main.go)
 - [Embedding Templates Into App Executable File](view/embedding-templates-into-app/main.go)
 
+
+You can serve [quicktemplate](https://github.com/valyala/quicktemplate) files too, simply by using the `context#ResponseWriter`, take a look at the [http_responsewriter/quicktemplate](http_responsewriter/quicktemplate) example.
+
 ### Authentication
 
 - [Basic Authentication](authentication/basicauth/main.go)
@@ -148,6 +151,7 @@ Navigate through examples for a better understanding.
 
 ### How to Write to `context.ResponseWriter() http.ResponseWriter`
 
+- [Write `valyala/quicktemplate` templates](http_responsewriter/quicktemplate)
 - [Text, Markdown, HTML, JSON, JSONP, XML, Binary](http_responsewriter/write-rest/main.go)
 - [Stream Writer](http_responsewriter/stream-writer/main.go)
 - [Transactions](http_responsewriter/transactions/main.go)

_examples/http_responsewriter/quicktemplate/README.md

@@ -0,0 +1,19 @@
+First of all, install [quicktemplate](https://github.com/valyala/quicktemplate) package and [quicktemplate compiler](https://github.com/valyala/quicktemplate/tree/master/qtc)
+
+```sh
+go get -u github.com/valyala/quicktemplate
+go get -u github.com/valyala/quicktemplate/qtc
+```
+
+The example has the Go code compiled already for you, therefore:
+```sh
+go run main.go # http://localhost:8080
+```
+
+However there is an instruction below, full documentation can be found at https://github.com/valyala/quicktemplate.
+
+Save your template files into `templates` folder under the extension *.qtpl, open your terminal and run `qtc` inside this folder.
+
+If all went ok, `*.qtpl.go` files must appear in the `templates` folder. These files contain the Go code for  all `*.qtpl` files.
+
+> Remember, each time you change a  a `/templates/*.qtpl` file you have to run the `qtc` command and re-build your application.

_examples/http_responsewriter/quicktemplate/controllers/execute_template.go

@@ -0,0 +1,14 @@
+package controllers
+
+import (
+	"github.com/kataras/iris/_examples/http_responsewriter/quicktemplate/templates"
+
+	"github.com/kataras/iris/context"
+)
+
+// ExecuteTemplate renders a "tmpl" partial template to the `context#ResponseWriter`.
+func ExecuteTemplate(ctx context.Context, tmpl templates.Partial) {
+	ctx.Gzip(true)
+	ctx.ContentType("text/html")
+	templates.WriteTemplate(ctx.ResponseWriter(), tmpl)
+}

_examples/http_responsewriter/quicktemplate/controllers/hello.go

@@ -0,0 +1,30 @@
+package controllers
+
+import (
+	"github.com/kataras/iris/_examples/http_responsewriter/quicktemplate/templates"
+
+	"github.com/kataras/iris/context"
+)
+
+// Hello renders our ../templates/hello.qtpl file using the compiled ../templates/hello.qtpl.go file.
+func Hello(ctx context.Context) {
+	// vars := make(map[string]interface{})
+	// vars["message"] = "Hello World!"
+	// vars["name"] = ctx.Params().Get("name")
+	// [...]
+	// &templates.Hello{ Vars: vars }
+	// [...]
+
+	// However, as an alternative, we recommend that you should the `ctx.ViewData(key, value)`
+	// in order to be able modify the `templates.Hello#Vars` from a middleware(other handlers) as well.
+	ctx.ViewData("message", "Hello World!")
+	ctx.ViewData("name", ctx.Params().Get("name"))
+
+	// set view data to the `Vars` template's field
+	tmpl := &templates.Hello{
+		Vars: ctx.GetViewData(),
+	}
+
+	// render the template
+	ExecuteTemplate(ctx, tmpl)
+}

_examples/http_responsewriter/quicktemplate/controllers/index.go

@@ -0,0 +1,15 @@
+package controllers
+
+import (
+	"github.com/kataras/iris/_examples/http_responsewriter/quicktemplate/templates"
+
+	"github.com/kataras/iris/context"
+)
+
+// Index renders our ../templates/index.qtpl file using the compiled ../templates/index.qtpl.go file.
+func Index(ctx context.Context) {
+	tmpl := &templates.Index{}
+
+	// render the template
+	ExecuteTemplate(ctx, tmpl)
+}

_examples/http_responsewriter/quicktemplate/main.go

@@ -0,0 +1,22 @@
+package main
+
+import (
+	"github.com/kataras/iris/_examples/http_responsewriter/quicktemplate/controllers"
+
+	"github.com/kataras/iris"
+)
+
+func newApp() *iris.Application {
+	app := iris.New()
+	app.Get("/", controllers.Index)
+	app.Get("/{name}", controllers.Hello)
+
+	return app
+}
+
+func main() {
+	app := newApp()
+	// http://localhost:8080
+	// http://localhost:8080/yourname
+	app.Run(iris.Addr(":8080"), iris.WithoutServerError(iris.ErrServerClosed))
+}

_examples/http_responsewriter/quicktemplate/main_test.go

@@ -0,0 +1,47 @@
+package main
+
+import (
+	"fmt"
+	"testing"
+
+	"github.com/kataras/iris/httptest"
+)
+
+func TestResponseWriterQuicktemplate(t *testing.T) {
+	baseRawBody := `
+<html>
+	<head>
+		<title>Quicktemplate integration with Iris</title>
+	</head>
+	<body>
+		<div>
+			Header contents here...
+		</div>
+
+		<div style="margin:10px;">
+			
+	<h1>%s</h1>
+	<div>
+		%s
+	</div>
+
+		</div>
+
+	</body>
+	<footer>
+		Footer contents here...
+	</footer>
+</html>
+`
+
+	expectedIndexRawBody := fmt.Sprintf(baseRawBody, "Index Page", "This is our index page's body.")
+	name := "yourname"
+	expectedHelloRawBody := fmt.Sprintf(baseRawBody, "Hello World!", "Hello <b>"+name+"!</b>")
+
+	app := newApp()
+
+	e := httptest.New(t, app)
+
+	e.GET("/").Expect().Status(httptest.StatusOK).Body().Equal(expectedIndexRawBody)
+	e.GET("/" + name).Expect().Status(httptest.StatusOK).Body().Equal(expectedHelloRawBody)
+}

_examples/http_responsewriter/quicktemplate/templates/base.qtpl

@@ -0,0 +1,36 @@
+This is our templates' base implementation.
+
+{% interface
+Partial {
+	Body()
+}
+%}
+
+
+Template writes a template implementing the Partial interface.
+{% func Template(p Partial) %}
+<html>
+	<head>
+		<title>Quicktemplate integration with Iris</title>
+	</head>
+	<body>
+		<div>
+			Header contents here...
+		</div>
+
+		<div style="margin:10px;">
+			{%= p.Body() %}
+		</div>
+
+	</body>
+	<footer>
+		Footer contents here...
+	</footer>
+</html>
+{% endfunc %}
+
+
+Base template implementation. Other pages may inherit from it if they need
+overriding only certain Partial methods.
+{% code type Base struct {} %}
+{% func (b *Base) Body() %}This is the base body{% endfunc %}

_examples/http_responsewriter/quicktemplate/templates/base.qtpl.go

@@ -0,0 +1,128 @@
+// This file is automatically generated by qtc from "base.qtpl".
+// See https://github.com/valyala/quicktemplate for details.
+
+// This is our templates' base implementation.
+//
+
+//line base.qtpl:3
+package templates
+
+//line base.qtpl:3
+import (
+	qtio422016 "io"
+
+	qt422016 "github.com/valyala/quicktemplate"
+)
+
+//line base.qtpl:3
+var (
+	_ = qtio422016.Copy
+	_ = qt422016.AcquireByteBuffer
+)
+
+//line base.qtpl:4
+type Partial interface {
+	//line base.qtpl:4
+	Body() string
+	//line base.qtpl:4
+	StreamBody(qw422016 *qt422016.Writer)
+	//line base.qtpl:4
+	WriteBody(qq422016 qtio422016.Writer)
+//line base.qtpl:4
+}
+
+// Template writes a template implementing the Partial interface.
+
+//line base.qtpl:11
+func StreamTemplate(qw422016 *qt422016.Writer, p Partial) {
+	//line base.qtpl:11
+	qw422016.N().S(`
+<html>
+	<head>
+		<title>Quicktemplate integration with Iris</title>
+	</head>
+	<body>
+		<div>
+			Header contents here...
+		</div>
+
+		<div style="margin:10px;">
+			`)
+	//line base.qtpl:22
+	p.StreamBody(qw422016)
+	//line base.qtpl:22
+	qw422016.N().S(`
+		</div>
+
+	</body>
+	<footer>
+		Footer contents here...
+	</footer>
+</html>
+`)
+//line base.qtpl:30
+}
+
+//line base.qtpl:30
+func WriteTemplate(qq422016 qtio422016.Writer, p Partial) {
+	//line base.qtpl:30
+	qw422016 := qt422016.AcquireWriter(qq422016)
+	//line base.qtpl:30
+	StreamTemplate(qw422016, p)
+	//line base.qtpl:30
+	qt422016.ReleaseWriter(qw422016)
+//line base.qtpl:30
+}
+
+//line base.qtpl:30
+func Template(p Partial) string {
+	//line base.qtpl:30
+	qb422016 := qt422016.AcquireByteBuffer()
+	//line base.qtpl:30
+	WriteTemplate(qb422016, p)
+	//line base.qtpl:30
+	qs422016 := string(qb422016.B)
+	//line base.qtpl:30
+	qt422016.ReleaseByteBuffer(qb422016)
+	//line base.qtpl:30
+	return qs422016
+//line base.qtpl:30
+}
+
+// Base template implementation. Other pages may inherit from it if they need
+// overriding only certain Partial methods.
+
+//line base.qtpl:35
+type Base struct{}
+
+//line base.qtpl:36
+func (b *Base) StreamBody(qw422016 *qt422016.Writer) {
+//line base.qtpl:36
+qw422016.N().S(`This is the base body`) }
+
+//line base.qtpl:36
+//line base.qtpl:36
+func (b *Base) WriteBody(qq422016 qtio422016.Writer) {
+	//line base.qtpl:36
+	qw422016 := qt422016.AcquireWriter(qq422016)
+	//line base.qtpl:36
+	b.StreamBody(qw422016)
+	//line base.qtpl:36
+	qt422016.ReleaseWriter(qw422016)
+//line base.qtpl:36
+}
+
+//line base.qtpl:36
+func (b *Base) Body() string {
+	//line base.qtpl:36
+	qb422016 := qt422016.AcquireByteBuffer()
+	//line base.qtpl:36
+	b.WriteBody(qb422016)
+	//line base.qtpl:36
+	qs422016 := string(qb422016.B)
+	//line base.qtpl:36
+	qt422016.ReleaseByteBuffer(qb422016)
+	//line base.qtpl:36
+	return qs422016
+//line base.qtpl:36
+}

_examples/http_responsewriter/quicktemplate/templates/hello.qtpl

@@ -0,0 +1,14 @@
+Hello template, implements the Partial's methods.
+
+{% code
+type Hello struct {
+  Vars map[string]interface{}
+}
+%}
+
+{% func (h *Hello) Body() %}
+	<h1>{%v h.Vars["message"] %}</h1>
+	<div>
+		Hello <b>{%v h.Vars["name"] %}!</b>
+	</div>
+{% endfunc %}

_examples/http_responsewriter/quicktemplate/templates/hello.qtpl.go

@@ -0,0 +1,72 @@
+// This file is automatically generated by qtc from "hello.qtpl".
+// See https://github.com/valyala/quicktemplate for details.
+
+// Hello template, implements the Partial's methods.
+//
+
+//line hello.qtpl:3
+package templates
+
+//line hello.qtpl:3
+import (
+	qtio422016 "io"
+
+	qt422016 "github.com/valyala/quicktemplate"
+)
+
+//line hello.qtpl:3
+var (
+	_ = qtio422016.Copy
+	_ = qt422016.AcquireByteBuffer
+)
+
+//line hello.qtpl:4
+type Hello struct {
+	Vars map[string]interface{}
+}
+
+//line hello.qtpl:9
+func (h *Hello) StreamBody(qw422016 *qt422016.Writer) {
+	//line hello.qtpl:9
+	qw422016.N().S(`
+	<h1>`)
+	//line hello.qtpl:10
+	qw422016.E().V(h.Vars["message"])
+	//line hello.qtpl:10
+	qw422016.N().S(`</h1>
+	<div>
+		Hello <b>`)
+	//line hello.qtpl:12
+	qw422016.E().V(h.Vars["name"])
+	//line hello.qtpl:12
+	qw422016.N().S(`!</b>
+	</div>
+`)
+//line hello.qtpl:14
+}
+
+//line hello.qtpl:14
+func (h *Hello) WriteBody(qq422016 qtio422016.Writer) {
+	//line hello.qtpl:14
+	qw422016 := qt422016.AcquireWriter(qq422016)
+	//line hello.qtpl:14
+	h.StreamBody(qw422016)
+	//line hello.qtpl:14
+	qt422016.ReleaseWriter(qw422016)
+//line hello.qtpl:14
+}
+
+//line hello.qtpl:14
+func (h *Hello) Body() string {
+	//line hello.qtpl:14
+	qb422016 := qt422016.AcquireByteBuffer()
+	//line hello.qtpl:14
+	h.WriteBody(qb422016)
+	//line hello.qtpl:14
+	qs422016 := string(qb422016.B)
+	//line hello.qtpl:14
+	qt422016.ReleaseByteBuffer(qb422016)
+	//line hello.qtpl:14
+	return qs422016
+//line hello.qtpl:14
+}

_examples/http_responsewriter/quicktemplate/templates/index.qtpl

@@ -0,0 +1,12 @@
+Index template, implements the Partial's methods.
+
+{% code
+type Index struct {}
+%}
+
+{% func (i *Index) Body() %}
+	<h1>Index Page</h1>
+	<div>
+		This is our index page's body.
+	</div>
+{% endfunc %}

_examples/http_responsewriter/quicktemplate/templates/index.qtpl.go

@@ -0,0 +1,62 @@
+// This file is automatically generated by qtc from "index.qtpl".
+// See https://github.com/valyala/quicktemplate for details.
+
+// Index template, implements the Partial's methods.
+//
+
+//line index.qtpl:3
+package templates
+
+//line index.qtpl:3
+import (
+	qtio422016 "io"
+
+	qt422016 "github.com/valyala/quicktemplate"
+)
+
+//line index.qtpl:3
+var (
+	_ = qtio422016.Copy
+	_ = qt422016.AcquireByteBuffer
+)
+
+//line index.qtpl:4
+type Index struct{}
+
+//line index.qtpl:7
+func (i *Index) StreamBody(qw422016 *qt422016.Writer) {
+	//line index.qtpl:7
+	qw422016.N().S(`
+	<h1>Index Page</h1>
+	<div>
+		This is our index page's body.
+	</div>
+`)
+//line index.qtpl:12
+}
+
+//line index.qtpl:12
+func (i *Index) WriteBody(qq422016 qtio422016.Writer) {
+	//line index.qtpl:12
+	qw422016 := qt422016.AcquireWriter(qq422016)
+	//line index.qtpl:12
+	i.StreamBody(qw422016)
+	//line index.qtpl:12
+	qt422016.ReleaseWriter(qw422016)
+//line index.qtpl:12
+}
+
+//line index.qtpl:12
+func (i *Index) Body() string {
+	//line index.qtpl:12
+	qb422016 := qt422016.AcquireByteBuffer()
+	//line index.qtpl:12
+	i.WriteBody(qb422016)
+	//line index.qtpl:12
+	qs422016 := string(qb422016.B)
+	//line index.qtpl:12
+	qt422016.ReleaseByteBuffer(qb422016)
+	//line index.qtpl:12
+	return qs422016
+//line index.qtpl:12
+}

context/context.go

@@ -22,6 +22,7 @@ import (
 	"strings"
 	"time"
 
+	"github.com/fatih/structs"
 	"github.com/microcosm-cc/bluemonday"
 	"github.com/monoculum/formam"
 	"github.com/russross/blackfriday"
@@ -486,6 +487,17 @@ type Context interface {
 	// Example: https://github.com/kataras/iris/tree/master/_examples/view/context-view-data/
 	ViewData(key string, value interface{})
 
+	// GetViewData returns the values registered by `context#ViewData`.
+	// The return value is `map[string]interface{}`, this means that
+	// if a custom struct registered to ViewData then this function
+	// will try to parse it to map, if failed then the return value is nil
+	// A check for nil is always a good practise if different
+	// kind of values or no data are registered via `ViewData`.
+	//
+	// Similarly to `viewData := ctx.Values().Get("iris.viewData")` or
+	// `viewData := ctx.Values().Get(ctx.Application().ConfigurationReadOnly().GetViewDataContextKey())`.
+	GetViewData() map[string]interface{}
+
 	// View renders templates based on the adapted view engines.
 	// First argument accepts the filename, relative to the view engine's Directory,
 	// i.e: if directory is "./templates" and want to render the "./templates/users/index.html"
@@ -1626,6 +1638,43 @@ func (ctx *context) ViewData(key string, value interface{}) {
 	}
 }
 
+// GetViewData returns the values registered by `context#ViewData`.
+// The return value is `map[string]interface{}`, this means that
+// if a custom struct registered to ViewData then this function
+// will try to parse it to map, if failed then the return value is nil
+// A check for nil is always a good practise if different
+// kind of values or no data are registered via `ViewData`.
+//
+// Similarly to `viewData := ctx.Values().Get("iris.viewData")` or
+// `viewData := ctx.Values().Get(ctx.Application().ConfigurationReadOnly().GetViewDataContextKey())`.
+func (ctx *context) GetViewData() map[string]interface{} {
+	viewDataContextKey := ctx.Application().ConfigurationReadOnly().GetViewDataContextKey()
+	v := ctx.Values().Get(viewDataContextKey)
+
+	// if no values found, then return nil
+	if v == nil {
+		return nil
+	}
+
+	// if struct, convert it to map[string]interface{}
+	if structs.IsStruct(v) {
+		return structs.Map(v)
+	}
+
+	// if pure map[string]interface{}
+	if viewData, ok := v.(map[string]interface{}); ok {
+		return viewData
+	}
+
+	// if context#Map
+	if viewData, ok := v.(Map); ok {
+		return viewData
+	}
+
+	// if failure, then return nil
+	return nil
+}
+
 // View renders templates based on the adapted view engines.
 // First argument accepts the filename, relative to the view engine's Directory,
 // i.e: if directory is "./templates" and want to render the "./templates/users/index.html"

core/router/handler.go

@@ -210,23 +210,22 @@ func (h *routerHandler) HandleRequest(ctx context.Context) {
 	}
 
 	if ctx.Application().ConfigurationReadOnly().GetFireMethodNotAllowed() {
-		var methodAllowed string
 		for i := range h.trees {
 			t := h.trees[i]
-			methodAllowed = t.Method // keep track of the allowed method of the last checked tree
-			if ctx.Method() != methodAllowed {
-				continue
-			}
-		}
-
-		if ctx.Method() != methodAllowed {
+			// a bit slower than previous implementation but @kataras let me to apply this change
+			// because it's more reliable.
+			//
+			// if `Configuration#FireMethodNotAllowed` is kept as defaulted(false) then this function will not
+			// run, therefore performance kept as before.
+			if t.Nodes.Exists(path) {
 				// RCF rfc2616 https://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html
 				// The response MUST include an Allow header containing a list of valid methods for the requested resource.
-			ctx.Header("Allow", methodAllowed)
+				ctx.Header("Allow", t.Method)
 				ctx.StatusCode(http.StatusMethodNotAllowed)
 				return
 			}
-
 		}
+	}
+
 	ctx.StatusCode(http.StatusNotFound)
 }

core/router/node/node.go

@@ -266,6 +266,15 @@ func (nodes Nodes) Find(path string, params *context.RequestParams) context.Hand
 	return nil
 }
 
+// Exists returns true if a node with that "path" exists,
+// otherise false.
+//
+// We don't care about parameters here.
+func (nodes Nodes) Exists(path string) bool {
+	n, _ := nodes.findChild(path, nil)
+	return n != nil && len(n.handlers) > 0
+}
+
 func (nodes Nodes) findChild(path string, params []string) (*node, []string) {
 	// println("request path: " + path)
 	for _, n := range nodes {