Initial commit.

mark.george / httpcat

Browse code Initial commit. master
0 parent commit c8a6b11c43831a1f8767c4c96879d7085b9c01b8 Mark authored on 30 May 2014

Patch

Showing 1 changed file

Ignore Space Show notes View src/httpcat.go 0 → 100644
/** Author: Mark George <mark.george@otago.ac.nz> Warranty: None. Works for me. If it doesn't work for you then you already have the source code... License: WTFPL v2 <http://www.wtfpl.net/txt/copying/> / package main import ( "fmt" "net/http" "net/http/httputil" "flag" "strconv" "io/ioutil" "os" ) var ( port int status int body string complete bool verbose bool server bool uri string ) func requestHandler(resp http.ResponseWriter, req http.Request) { if verbose { fmt.Printf("Received a %s request to %s\n", req.Method, req.RequestURI) } // print complete request if complete { dump, _ := httputil.DumpRequest(req, true) fmt.Println(string(dump[:])) // print only request body } else { body, _ := ioutil.ReadAll(req.Body) fmt.Println(string(body[:])); } // send response if body != "" { if status == 204 {status = 200} // if we have a body then we don't want to return the default 204 status resp.WriteHeader(status) fmt.Fprintf(resp, body) } else { resp.WriteHeader(status) } } func parseCommandLine() { flag.IntVar(&port, "port", 8080, "") flag.IntVar(&port, "p", 8080, "") flag.IntVar(&status, "status", 204, "") flag.IntVar(&status, "s", 204, "") flag.StringVar(&body, "body", "", "") flag.StringVar(&body, "b", "", "") flag.BoolVar(&complete, "complete", false, "") flag.BoolVar(&complete, "c", false, "") flag.BoolVar(&verbose, "verbose", false, ""); flag.BoolVar(&verbose, "v", false, ""); serverMode := flag.Bool("listen", false, ""); clientMode := flag.Bool("get", false, ""); flag.Usage = usage flag.Parse() if !(serverMode \|\| clientMode) \|\| (serverMode && clientMode) { usage(); os.Exit(1) } else { server = serverMode } if clientMode { uri = flag.Arg(0) if uri == "" { usage(); os.Exit(1) } } } func startServer() { http.HandleFunc("/", requestHandler) if err := http.ListenAndServe(":"+strconv.Itoa(port), nil); err != nil { fmt.Printf("Could not start server. Is port %d available?\n", port) } } func sendRequest(uri string) { response, err := http.Get(uri) if(err != nil) { fmt.Println(err); } else { dump, _ := httputil.DumpResponse(response, true) fmt.Println(string(dump[:])) } } var usage = func() { fmt.Fprintf(os.Stderr, "Usage:\n") fmt.Fprintf(os.Stderr, "\n") fmt.Fprintf(os.Stderr, " Client mode\n\n") fmt.Fprintf(os.Stderr, " httpcat -get [options] http://uri-to-send-request-to.com\n") fmt.Fprintf(os.Stderr, "\n\n") fmt.Fprintf(os.Stderr, " Server mode\n\n") fmt.Fprintf(os.Stderr, " httpcat -listen [options]\n") fmt.Fprintf(os.Stderr, "\n\n") fmt.Fprintf(os.Stderr, " Options (client or server mode)\n") fmt.Fprintf(os.Stderr, " -complete or -c : Display entire request/response instead of just the body.\n") fmt.Fprintf(os.Stderr, " -verbose or -v : Be verbose.\n") fmt.Fprintf(os.Stderr, "\n") fmt.Fprintf(os.Stderr, " Options (server mode only)\n") fmt.Fprintf(os.Stderr, " -port or -p [port] : Port to listen on.\n") fmt.Fprintf(os.Stderr, " -body or -b [body message] : Body to respond with. Status will default to 200.\n") fmt.Fprintf(os.Stderr, " -status or -s [status code] : Status code to respond with. Defaults to 204.\n") } func main() { parseCommandLine() if server { // server mode if verbose { fmt.Printf("Listening on port %d.\n", port) if complete { fmt.Println("Displaying complete requests.\n") } else { fmt.Println("Displaying bodies only.\n") } } startServer() } else { // client mode if verbose { fmt.Println("Sending GET request to " + uri); } sendRequest(uri) } }

Ignore Space Show notes View

src/httpcat.go 0 → 100644

/**
	Author:  Mark George <mark.george@otago.ac.nz>
	Warranty:  None.  Works for me.  If it doesn't work for you then you already have the source code...
	License: WTFPL v2 <http://www.wtfpl.net/txt/copying/>
*/

package main

import (
	"fmt"
	"net/http"
	"net/http/httputil"
	"flag"
	"strconv"
	"io/ioutil"
	"os"
)

var (
	port     int
	status   int
	body     string
	complete bool
	verbose  bool
	server   bool
	uri      string
)

func requestHandler(resp http.ResponseWriter, req *http.Request) {

if verbose { fmt.Printf("Received a %s request to %s\n", req.Method, req.RequestURI) }

// print complete request
	if complete {
		dump, _ := httputil.DumpRequest(req, true)
		fmt.Println(string(dump[:]))

// print only request body
	} else {
		body, _ := ioutil.ReadAll(req.Body)
		fmt.Println(string(body[:]));
	}

// send response
	if body != "" {
		if status == 204 {status = 200}  // if we have a body then we don't want to return the default 204 status
		resp.WriteHeader(status)
		fmt.Fprintf(resp, body)
	} else {
		resp.WriteHeader(status)
	}

}

func parseCommandLine() {
	flag.IntVar(&port, "port", 8080, "")
	flag.IntVar(&port, "p", 8080, "")

flag.IntVar(&status, "status", 204, "")
	flag.IntVar(&status, "s", 204, "")

flag.StringVar(&body, "body", "", "")
	flag.StringVar(&body, "b", "", "")

flag.BoolVar(&complete, "complete", false, "")
	flag.BoolVar(&complete, "c", false, "")

flag.BoolVar(&verbose, "verbose", false, "");
	flag.BoolVar(&verbose, "v", false, "");

serverMode := flag.Bool("listen", false, "");
	clientMode := flag.Bool("get", false, "");

flag.Usage = usage

flag.Parse()

if !(*serverMode || *clientMode) || (*serverMode && *clientMode) {
		usage();
		os.Exit(1)
	} else {
		server = *serverMode
	}

if *clientMode {
		uri = flag.Arg(0)
		if uri == "" {
			usage();
			os.Exit(1)
		}
	}

}

func startServer() {
	http.HandleFunc("/", requestHandler)

if err := http.ListenAndServe(":"+strconv.Itoa(port), nil); err != nil {
		fmt.Printf("Could not start server.  Is port %d available?\n", port)
	}
}

func sendRequest(uri string) {
		response, err := http.Get(uri)

if(err != nil) {
			fmt.Println(err);
		} else {
			dump, _ := httputil.DumpResponse(response, true)
			fmt.Println(string(dump[:]))
		}
}

var usage = func() {
	fmt.Fprintf(os.Stderr, "Usage:\n")
	fmt.Fprintf(os.Stderr, "\n")
	fmt.Fprintf(os.Stderr, "  Client mode\n\n")
	fmt.Fprintf(os.Stderr, "    httpcat -get [options] http://uri-to-send-request-to.com\n")
	fmt.Fprintf(os.Stderr, "\n\n")
	fmt.Fprintf(os.Stderr, "  Server mode\n\n")
	fmt.Fprintf(os.Stderr, "    httpcat -listen [options]\n")
	fmt.Fprintf(os.Stderr, "\n\n")
	fmt.Fprintf(os.Stderr, "  Options (client or server mode)\n")
	fmt.Fprintf(os.Stderr, "    -complete or -c : Display entire request/response instead of just the body.\n")
	fmt.Fprintf(os.Stderr, "    -verbose or -v : Be verbose.\n")
	fmt.Fprintf(os.Stderr, "\n")
	fmt.Fprintf(os.Stderr, "  Options (server mode only)\n")
	fmt.Fprintf(os.Stderr, "    -port or -p [port] : Port to listen on.\n")
	fmt.Fprintf(os.Stderr, "    -body or -b [body message] : Body to respond with.  Status will default to 200.\n")
	fmt.Fprintf(os.Stderr, "    -status or -s [status code] : Status code to respond with.  Defaults to 204.\n")
}

func main() {

parseCommandLine()

if server {

// server mode

if verbose {
			fmt.Printf("Listening on port %d.\n", port)
			if complete { fmt.Println("Displaying complete requests.\n") } else { fmt.Println("Displaying bodies only.\n") }
		}

startServer()

} else {

// client mode

if verbose { fmt.Println("Sending GET request to " + uri); }
		sendRequest(uri)
	}
}

Show line notes below