github.com/tcnksm/go@v0.0.0-20141208075154-439b32936367/src/net/http/example_test.go (about)

     1  // Copyright 2012 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  package http_test
     6  
     7  import (
     8  	"fmt"
     9  	"io/ioutil"
    10  	"log"
    11  	"net/http"
    12  )
    13  
    14  func ExampleHijacker() {
    15  	http.HandleFunc("/hijack", func(w http.ResponseWriter, r *http.Request) {
    16  		hj, ok := w.(http.Hijacker)
    17  		if !ok {
    18  			http.Error(w, "webserver doesn't support hijacking", http.StatusInternalServerError)
    19  			return
    20  		}
    21  		conn, bufrw, err := hj.Hijack()
    22  		if err != nil {
    23  			http.Error(w, err.Error(), http.StatusInternalServerError)
    24  			return
    25  		}
    26  		// Don't forget to close the connection:
    27  		defer conn.Close()
    28  		bufrw.WriteString("Now we're speaking raw TCP. Say hi: ")
    29  		bufrw.Flush()
    30  		s, err := bufrw.ReadString('\n')
    31  		if err != nil {
    32  			log.Printf("error reading string: %v", err)
    33  			return
    34  		}
    35  		fmt.Fprintf(bufrw, "You said: %q\nBye.\n", s)
    36  		bufrw.Flush()
    37  	})
    38  }
    39  
    40  func ExampleGet() {
    41  	res, err := http.Get("http://www.google.com/robots.txt")
    42  	if err != nil {
    43  		log.Fatal(err)
    44  	}
    45  	robots, err := ioutil.ReadAll(res.Body)
    46  	res.Body.Close()
    47  	if err != nil {
    48  		log.Fatal(err)
    49  	}
    50  	fmt.Printf("%s", robots)
    51  }
    52  
    53  func ExampleFileServer() {
    54  	// Simple static webserver:
    55  	log.Fatal(http.ListenAndServe(":8080", http.FileServer(http.Dir("/usr/share/doc"))))
    56  }
    57  
    58  func ExampleFileServer_stripPrefix() {
    59  	// To serve a directory on disk (/tmp) under an alternate URL
    60  	// path (/tmpfiles/), use StripPrefix to modify the request
    61  	// URL's path before the FileServer sees it:
    62  	http.Handle("/tmpfiles/", http.StripPrefix("/tmpfiles/", http.FileServer(http.Dir("/tmp"))))
    63  }
    64  
    65  func ExampleStripPrefix() {
    66  	// To serve a directory on disk (/tmp) under an alternate URL
    67  	// path (/tmpfiles/), use StripPrefix to modify the request
    68  	// URL's path before the FileServer sees it:
    69  	http.Handle("/tmpfiles/", http.StripPrefix("/tmpfiles/", http.FileServer(http.Dir("/tmp"))))
    70  }
    71  
    72  type apiHandler struct{}
    73  
    74  func (apiHandler) ServeHTTP(http.ResponseWriter, *http.Request) {}
    75  
    76  func ExampleServeMux_Handle() {
    77  	mux := http.NewServeMux()
    78  	mux.Handle("/api/", apiHandler{})
    79  	mux.HandleFunc("/", func(w http.ResponseWriter, req *http.Request) {
    80  		// The "/" pattern matches everything, so we need to check
    81  		// that we're at the root here.
    82  		if req.URL.Path != "/" {
    83  			http.NotFound(w, req)
    84  			return
    85  		}
    86  		fmt.Fprintf(w, "Welcome to the home page!")
    87  	})
    88  }