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📁 ..
📄 alpn_test.go(3.01 KB)
📁 cgi
📄 client.go(33.4 KB)
📄 client_test.go(63.24 KB)
📄 clientserver_test.go(46.07 KB)
📄 clone.go(1.56 KB)
📄 cookie.go(11.53 KB)
📄 cookie_test.go(19.26 KB)
📁 cookiejar
📄 doc.go(3.42 KB)
📄 example_filesystem_test.go(2.04 KB)
📄 example_handle_test.go(560 B)
📄 example_test.go(5.38 KB)
📄 export_test.go(8.43 KB)
📁 fcgi
📄 filetransport.go(3.52 KB)
📄 filetransport_test.go(2.62 KB)
📄 fs.go(30.36 KB)
📄 fs_test.go(46.7 KB)
📄 h2_bundle.go(357.28 KB)
📄 h2_error.go(812 B)
📄 h2_error_test.go(1.04 KB)
📄 header.go(7.9 KB)
📄 header_test.go(6.05 KB)
📄 http.go(5.13 KB)
📄 http_test.go(5.22 KB)
📁 httptest
📁 httptrace
📁 httputil
📁 internal
📄 jar.go(900 B)
📄 main_test.go(4.94 KB)
📄 mapping.go(1.68 KB)
📄 mapping_test.go(2.95 KB)
📄 method.go(517 B)
📄 omithttp2.go(1.91 KB)
📄 pattern.go(15.17 KB)
📄 pattern_test.go(14.5 KB)
📁 pprof
📄 proxy_test.go(1.16 KB)
📄 range_test.go(2.38 KB)
📄 readrequest_test.go(9.7 KB)
📄 request.go(48.34 KB)
📄 request_test.go(42.39 KB)
📄 requestwrite_test.go(23.3 KB)
📄 response.go(11.1 KB)
📄 response_test.go(23.63 KB)
📄 responsecontroller.go(4.17 KB)
📄 responsecontroller_test.go(9.81 KB)
📄 responsewrite_test.go(6.89 KB)
📄 roundtrip.go(566 B)
📄 roundtrip_js.go(11.8 KB)
📄 routing_index.go(3.95 KB)
📄 routing_index_test.go(4.02 KB)
📄 routing_tree.go(7.48 KB)
📄 routing_tree_test.go(6.89 KB)
📄 serve_test.go(192.54 KB)
📄 servemux121.go(5.6 KB)
📄 server.go(120.67 KB)
📄 server_test.go(6.95 KB)
📄 sniff.go(7.9 KB)
📄 sniff_test.go(9.56 KB)
📄 socks_bundle.go(12.9 KB)
📄 status.go(7.45 KB)
📁 testdata
📄 transfer.go(30.89 KB)
📄 transfer_test.go(9.13 KB)
📄 transport.go(87.81 KB)
📄 transport_default_other.go(362 B)
📄 transport_default_wasm.go(364 B)
📄 transport_internal_test.go(6.05 KB)
📄 transport_test.go(186.06 KB)
📄 triv.go(3.22 KB)

Editing: triv.go

// Copyright 2009 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

//go:build ignore

package main

import (
	"expvar"
	"flag"
	"fmt"
	"io"
	"log"
	"net/http"
	"os"
	"os/exec"
	"strconv"
	"strings"
	"sync"
)

// hello world, the web server
var helloRequests = expvar.NewInt("hello-requests")

func HelloServer(w http.ResponseWriter, req *http.Request) {
	helloRequests.Add(1)
	io.WriteString(w, "hello, world!\n")
}

// Simple counter server. POSTing to it will set the value.
type Counter struct {
	mu sync.Mutex // protects n
	n  int
}

// This makes Counter satisfy the [expvar.Var] interface, so we can export
// it directly.
func (ctr *Counter) String() string {
	ctr.mu.Lock()
	defer ctr.mu.Unlock()
	return strconv.Itoa(ctr.n)
}

func (ctr *Counter) ServeHTTP(w http.ResponseWriter, req *http.Request) {
	ctr.mu.Lock()
	defer ctr.mu.Unlock()
	switch req.Method {
	case "GET":
		ctr.n++
	case "POST":
		var buf strings.Builder
		io.Copy(&buf, req.Body)
		body := buf.String()
		if n, err := strconv.Atoi(body); err != nil {
			fmt.Fprintf(w, "bad POST: %v\nbody: [%v]\n", err, body)
		} else {
			ctr.n = n
			fmt.Fprint(w, "counter reset\n")
		}
	}
	fmt.Fprintf(w, "counter = %d\n", ctr.n)
}

// simple flag server
var booleanflag = flag.Bool("boolean", true, "another flag for testing")

func FlagServer(w http.ResponseWriter, req *http.Request) {
	w.Header().Set("Content-Type", "text/plain; charset=utf-8")
	fmt.Fprint(w, "Flags:\n")
	flag.VisitAll(func(f *flag.Flag) {
		if f.Value.String() != f.DefValue {
			fmt.Fprintf(w, "%s = %s [default = %s]\n", f.Name, f.Value.String(), f.DefValue)
		} else {
			fmt.Fprintf(w, "%s = %s\n", f.Name, f.Value.String())
		}
	})
}

// simple argument server
func ArgServer(w http.ResponseWriter, req *http.Request) {
	for _, s := range os.Args {
		fmt.Fprint(w, s, " ")
	}
}

// a channel (just for the fun of it)
type Chan chan int

func ChanCreate() Chan {
	c := make(Chan)
	go func(c Chan) {
		for x := 0; ; x++ {
			c <- x
		}
	}(c)
	return c
}

func (ch Chan) ServeHTTP(w http.ResponseWriter, req *http.Request) {
	io.WriteString(w, fmt.Sprintf("channel send #%d\n", <-ch))
}

// exec a program, redirecting output.
func DateServer(rw http.ResponseWriter, req *http.Request) {
	rw.Header().Set("Content-Type", "text/plain; charset=utf-8")

date, err := exec.Command("/bin/date").Output()
	if err != nil {
		http.Error(rw, err.Error(), http.StatusInternalServerError)
		return
	}
	rw.Write(date)
}

func Logger(w http.ResponseWriter, req *http.Request) {
	log.Print(req.URL)
	http.Error(w, "oops", http.StatusNotFound)
}

var webroot = flag.String("root", "", "web root directory")

func main() {
	flag.Parse()

// The counter is published as a variable directly.
	ctr := new(Counter)
	expvar.Publish("counter", ctr)
	http.Handle("/counter", ctr)
	http.Handle("/", http.HandlerFunc(Logger))
	if *webroot != "" {
		http.Handle("/go/", http.StripPrefix("/go/", http.FileServer(http.Dir(*webroot))))
	}
	http.Handle("/chan", ChanCreate())
	http.HandleFunc("/flags", FlagServer)
	http.HandleFunc("/args", ArgServer)
	http.HandleFunc("/go/hello", HelloServer)
	http.HandleFunc("/date", DateServer)
	log.Fatal(http.ListenAndServe("localhost:12345", nil))
}

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Editing: triv.go

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