Add index page

2024-11-27 11:28:14 +01:00 · 2020-11-22 17:54:44 -08:00 · 2020-11-22 17:54:44 -08:00 · 44aa04981e
commit 44aa04981e
parent 2dd0a77b6e
5 changed files with 185 additions and 127 deletions
--- a/README.md
+++ b/README.md
@ -1,8 +1,10 @@
 # gmitohtml
+[![GoDoc](https://gitlab.com/tslocum/godoc-static/-/raw/master/badge.svg)](https://docs.rocketnine.space/gitlab.com/tslocum/gmitohtml)
 [![CI status](https://gitlab.com/tslocum/gmitohtml/badges/master/pipeline.svg)](https://gitlab.com/tslocum/gmitohtml/commits/master)
 [![Donate](https://img.shields.io/liberapay/receives/rocketnine.space.svg?logo=liberapay)](https://liberapay.com/rocketnine.space)

-[Gemini](https://gemini.circumlunar.space) to HTML conversion tool and daemon
+[Gemini](https://gemini.circumlunar.space) to [HTML](https://en.wikipedia.org/wiki/HTML)
+conversion tool and daemon

 ## Download

--- a/pkg/gmitohtml/assets.go
+++ b/pkg/gmitohtml/assets.go
@ -2,6 +2,28 @@ package gmitohtml

 var fs = make(inMemoryFS)

+const indexPage = `
+<!DOCTYPE html>
+<html>
+<head>
+<title>Xenia</title>
+<link rel="stylesheet" href="/assets/style.css"></link>
+</head>
+<body>
+<h1>Welcome to Xenia</h1><br>
+<form method="post" action="/">
+<input type="text" name="address" placeholder="Address" size="50" autofocus> <input type="submit" value="Go">
+</form>
+<br>
+<ul>
+<li><a href="/gemini/gus.guru/">GUS - Gemini Universal Search</a></li>
+<li><a href="/gemini/gemini.circumlunar.space/">Gemini protocol</a></li>
+<li><a href="https://gitlab.com/tslocum/xenia">Xenia</a></li>
+</ul>
+</body>
+</html>
+`
+
 func loadAssets() {
 	fs["/assets/style.css"] = loadFile("style.css", `
 /*! normalize.css v8.0.1 | MIT License | github.com/necolas/normalize.css */
--- a/pkg/gmitohtml/convert.go
+++ b/pkg/gmitohtml/convert.go
@ -3,12 +3,8 @@ package gmitohtml
 import (
 	"bufio"
 	"bytes"
-	"crypto/tls"
 	"errors"
 	"fmt"
-	"io/ioutil"
-	"log"
-	"net/http"
 	"net/url"
 	"path"
 	"strings"
@ -74,6 +70,9 @@ func Convert(page []byte, u string) []byte {

 		if l >= 7 && bytes.HasPrefix(line, []byte("=> ")) {
 			split := bytes.SplitN(line[3:], []byte(" "), 2)
+			if len(split) != 2 {
+				split = bytes.SplitN(line[3:], []byte("\t"), 2)
+			}
 			if len(split) == 2 {
 				link := append([]byte(`<a href="`), rewriteURL(string(split[0]), parsedURL)...)
 				link = append(link, []byte(`">`)...)
@ -110,125 +109,3 @@ func Convert(page []byte, u string) []byte {
 	result = append(result, []byte("\n</body>\n</html>")...)
 	return result
 }
-
-// Fetch downloads and converts a Gemini page.
-func fetch(u string, clientCertFile string, clientCertKey string) ([]byte, []byte, error) {
-	if u == "" {
-		return nil, nil, ErrInvalidURL
-	}
-
-	requestURL, err := url.ParseRequestURI(u)
-	if err != nil {
-		return nil, nil, err
-	}
-	if requestURL.Scheme == "" {
-		requestURL.Scheme = "gemini"
-	}
-
-	host := requestURL.Host
-	if strings.IndexRune(host, ':') == -1 {
-		host += ":1965"
-	}
-
-	tlsConfig := &tls.Config{}
-
-	conn, err := tls.Dial("tcp", host, tlsConfig)
-	if err != nil {
-		return nil, nil, err
-	}
-
-	// Send request header
-	conn.Write([]byte(requestURL.String() + "\r\n"))
-
-	data, err := ioutil.ReadAll(conn)
-	if err != nil {
-		return nil, nil, err
-	}
-
-	firstNewLine := -1
-	l := len(data)
-	if l > 2 {
-		for i := 1; i < l; i++ {
-			if data[i] == '\n' && data[i-1] == '\r' {
-				firstNewLine = i
-				break
-			}
-		}
-	}
-	var header []byte
-	if firstNewLine > -1 {
-		header = data[:firstNewLine]
-		data = data[firstNewLine+1:]
-	}
-
-	if bytes.HasPrefix(header, []byte("text/html")) {
-		return header, data, nil
-	}
-	return header, Convert(data, requestURL.String()), nil
-}
-
-func handleRequest(writer http.ResponseWriter, request *http.Request) {
-	defer request.Body.Close()
-	if request.URL == nil {
-		return
-	}
-
-	pathSplit := strings.Split(request.URL.Path, "/")
-	if len(pathSplit) < 2 || pathSplit[1] != "gemini" {
-		writer.Write([]byte("Error: invalid protocol, only Gemini is supported"))
-		return
-	}
-
-	u, err := url.ParseRequestURI("gemini://" + strings.Join(pathSplit[2:], "/"))
-	if err != nil {
-		writer.Write([]byte("Error: invalid URL"))
-		return
-	}
-
-	header, data, err := fetch(u.String(), "", "")
-	if err != nil {
-		fmt.Fprintf(writer, "Error: failed to fetch %s: %s", u, err)
-		return
-	}
-
-	if len(header) > 0 && header[0] == '3' {
-		split := bytes.SplitN(header, []byte(" "), 2)
-		if len(split) == 2 {
-			http.Redirect(writer, request, rewriteURL(string(split[1]), request.URL), http.StatusTemporaryRedirect)
-			return
-		}
-	}
-
-	if len(header) > 3 && !bytes.HasPrefix(header[3:], []byte("text/gemini")) {
-		writer.Header().Set("Content-Type", string(header[3:]))
-	} else {
-		writer.Header().Set("Content-Type", "text/html; charset=utf-8")
-	}
-
-	writer.Write(data)
-}
-
-func handleAssets(writer http.ResponseWriter, request *http.Request) {
-	assetLock.Lock()
-	defer assetLock.Unlock()
-
-	writer.Header().Set("Cache-Control", "max-age=86400")
-
-	http.FileServer(fs).ServeHTTP(writer, request)
-}
-
-// StartDaemon starts the page conversion daemon.
-func StartDaemon(address string) error {
-	loadAssets()
-
-	daemonAddress = address
-
-	handler := http.NewServeMux()
-	handler.HandleFunc("/assets/style.css", handleAssets)
-	handler.HandleFunc("/", handleRequest)
-	go func() {
-		log.Fatal(http.ListenAndServe(address, handler))
-	}()
-
-	return nil
-}
--- a/pkg/gmitohtml/daemon.go
+++ b/pkg/gmitohtml/daemon.go
@ -0,0 +1,153 @@
+package gmitohtml
+
+import (
+	"bytes"
+	"crypto/tls"
+	"fmt"
+	"io/ioutil"
+	"log"
+	"net/http"
+	"net/url"
+	"strings"
+)
+
+// Fetch downloads and converts a Gemini page.
+func fetch(u string, clientCertFile string, clientCertKey string) ([]byte, []byte, error) {
+	if u == "" {
+		return nil, nil, ErrInvalidURL
+	}
+
+	requestURL, err := url.ParseRequestURI(u)
+	if err != nil {
+		return nil, nil, err
+	}
+	if requestURL.Scheme == "" {
+		requestURL.Scheme = "gemini"
+	}
+
+	host := requestURL.Host
+	if strings.IndexRune(host, ':') == -1 {
+		host += ":1965"
+	}
+
+	tlsConfig := &tls.Config{
+		// This must be enabled until most sites have transitioned away from
+		// using self-signed certificates.
+		InsecureSkipVerify: true,
+	}
+
+	conn, err := tls.Dial("tcp", host, tlsConfig)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	// Send request header
+	conn.Write([]byte(requestURL.String() + "\r\n"))
+
+	data, err := ioutil.ReadAll(conn)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	firstNewLine := -1
+	l := len(data)
+	if l > 2 {
+		for i := 1; i < l; i++ {
+			if data[i] == '\n' && data[i-1] == '\r' {
+				firstNewLine = i
+				break
+			}
+		}
+	}
+	var header []byte
+	if firstNewLine > -1 {
+		header = data[:firstNewLine]
+		data = data[firstNewLine+1:]
+	}
+
+	if bytes.HasPrefix(header, []byte("text/html")) {
+		return header, data, nil
+	}
+	return header, Convert(data, requestURL.String()), nil
+}
+
+func handleIndex(writer http.ResponseWriter, request *http.Request) {
+	address := request.FormValue("address")
+	if address != "" {
+		http.Redirect(writer, request, rewriteURL(address, request.URL), http.StatusTemporaryRedirect)
+		return
+	}
+
+	writer.Write([]byte(indexPage))
+}
+
+func handleRequest(writer http.ResponseWriter, request *http.Request) {
+	defer request.Body.Close()
+	if request.URL == nil {
+		return
+	}
+
+	if request.URL.Path == "/" {
+		handleIndex(writer, request)
+		return
+	}
+
+	pathSplit := strings.Split(request.URL.Path, "/")
+	if len(pathSplit) < 2 || pathSplit[1] != "gemini" {
+		writer.Write([]byte("Error: invalid protocol, only Gemini is supported"))
+		return
+	}
+
+	u, err := url.ParseRequestURI("gemini://" + strings.Join(pathSplit[2:], "/"))
+	if err != nil {
+		writer.Write([]byte("Error: invalid URL"))
+		return
+	}
+
+	header, data, err := fetch(u.String(), "", "")
+	if err != nil {
+		fmt.Fprintf(writer, "Error: failed to fetch %s: %s", u, err)
+		return
+	}
+
+	if len(header) > 0 && header[0] == '3' {
+		split := bytes.SplitN(header, []byte(" "), 2)
+		if len(split) == 2 {
+			http.Redirect(writer, request, rewriteURL(string(split[1]), request.URL), http.StatusTemporaryRedirect)
+			return
+		}
+	}
+
+	if len(header) > 3 && !bytes.HasPrefix(header[3:], []byte("text/gemini")) {
+		writer.Header().Set("Content-Type", string(header[3:]))
+	} else {
+		writer.Header().Set("Content-Type", "text/html; charset=utf-8")
+	}
+
+	writer.Write(data)
+}
+
+func handleAssets(writer http.ResponseWriter, request *http.Request) {
+	assetLock.Lock()
+	defer assetLock.Unlock()
+
+	writer.Header().Set("Cache-Control", "max-age=86400")
+
+	http.FileServer(fs).ServeHTTP(writer, request)
+}
+
+// StartDaemon starts the page conversion daemon.
+func StartDaemon(address string) error {
+	loadAssets()
+
+	daemonAddress = address
+
+	handler := http.NewServeMux()
+	handler.HandleFunc("/assets/style.css", handleAssets)
+	handler.HandleFunc("/", handleRequest)
+	go func() {
+		log.Fatal(http.ListenAndServe(address, handler))
+	}()
+
+	return nil
+}
--- a/pkg/gmitohtml/doc.go
+++ b/pkg/gmitohtml/doc.go
@ -0,0 +1,4 @@
+/*
+Package gmitohtml converts Gemini pages to HTML.
+*/
+package gmitohtml