Added HelloWorld server example

examples/README.md

@@ -1,3 +1,4 @@
 # Code examples
 
+* [HelloWorld server](helloworldserver)
 * [Static file server](fileserver)

examples/helloworldserver/Makefile

@@ -0,0 +1,6 @@
+helloworldserver: clean
+	go get -u github.com/valyala/fasthttp
+	go build
+
+clean:
+	rm -f helloworldserver

examples/helloworldserver/README.md

@@ -0,0 +1,15 @@
+# HelloWorld server example
+
+Displays various request info.
+
+# How to build
+
+```
+make
+```
+
+# How to run
+
+```
+./helloworldserver -addr=tcp.addr.to.listen:to
+```

examples/helloworldserver/helloworldserver.go

@@ -0,0 +1,38 @@
+package main
+
+import (
+	"flag"
+	"fmt"
+	"log"
+
+	"github.com/valyala/fasthttp"
+)
+
+var addr = flag.String("addr", ":8080", "TCP address to listen to")
+
+func main() {
+	flag.Parse()
+
+	if err := fasthttp.ListenAndServe(*addr, requestHandler); err != nil {
+		log.Fatalf("Error in ListenAndServe: %s", err)
+	}
+}
+
+func requestHandler(ctx *fasthttp.RequestCtx) {
+	fmt.Fprintf(ctx, "Hello, world!\n\n")
+
+	fmt.Fprintf(ctx, "Request method is %q\n", ctx.Method())
+	fmt.Fprintf(ctx, "RequestURI is %q\n", ctx.RequestURI())
+	fmt.Fprintf(ctx, "Requested path is %q\n", ctx.Path())
+	fmt.Fprintf(ctx, "Host is %q\n", ctx.Host())
+	fmt.Fprintf(ctx, "Query string is %q\n", ctx.QueryArgs())
+	fmt.Fprintf(ctx, "User-Agent is %q\n", ctx.Request.Header.UserAgent())
+	fmt.Fprintf(ctx, "Connection has been established at %s\n", ctx.ConnTime())
+	fmt.Fprintf(ctx, "Request has been started at %s\n", ctx.Time())
+	fmt.Fprintf(ctx, "Serial request number for the current connection is %d\n", ctx.ConnRequestNum())
+	fmt.Fprintf(ctx, "Your ip is %q\n\n", ctx.RemoteIP())
+
+	fmt.Fprintf(ctx, "Raw request is:\n---CUT---\n%s\n---CUT---", &ctx.Request)
+
+	ctx.SetContentType("text/plain; charset=utf8")
+}