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add an HTML error page
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1 {!

2 /*

3  * Copyright (c) 2022 Omar Polo <op@omarpolo.com>

4  *

5  * Permission to use, copy, modify, and distribute this software for any

6  * purpose with or without fee is hereby granted, provided that the above

7  * copyright notice and this permission notice appear in all copies.

8  *

9  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES

10  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF

11  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR

12  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES

13  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN

14  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF

15  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

16  */

18 #include <sys/queue.h>

19 #include <sys/tree.h>

21 #include <netinet/in.h>

22 #include <arpa/inet.h>

24 #include <event.h>

25 #include <limits.h>

26 #include <stdint.h>

27 #include <string.h>

29 #include "galileo.h"

31 !}

33 {{ define tp_head(struct template *tp, const char *lang,

34     const char *title) }}

35 {! struct client *clt = tp->tp_arg; !}

36 {! struct proxy_config *pc = clt->clt_pc; !}

37 {! const char *stylesheet = pc->stylesheet; !}

38 {! const char *path = clt->clt_path_info; !}

39 <!doctype html>

40 <html{{ if *lang != '\0' }}lang="{{ lang }}"{{ end }}>

41 	<head>

42 		<meta name="viewport" content="initial-scale=1" />

43 		{{ if *stylesheet != '\0' }}

44 		<link rel="stylesheet" href="{{ stylesheet|urlescape }}" />

45 		{{ end }}

46 		<title>

47 			{{ if title }}

48 				{{ title }}

49 			{{ else }}

50 				gemini://{{ pc->proxy_name }}{{ path }}

51 			{{ end }}

52 		</title>

53 	</head>

54 	<body>

55 {{ end }}

57 {{ define tp_foot(struct template *tp) }}

58 	{! struct client *clt = tp->tp_arg; !}

59 	{! struct proxy_config *pc = clt->clt_pc; !}

60 	{! const char *host = pc->proxy_name; !}

61 	{! const char *path = clt->clt_path_info; !}

63 		<footer>

64 			<hr />

65 			<dl>

66 				<dt>Original URL:</dt>

67 				<dd>

68 <a href="gemini://{{ host | urlescape }}{{ path | urlescape }}">

69 gemini://{{ host }}{{ path }}

70 </a>

71 				</dd>

72 			</dl>

73 		</footer>

74 	</body>

75 </html>

76 {{ end }}

78 {{ define tp_figure(struct template *tp, const char *url,

79     const char *label) }}

80 {!

81 	struct client	*clt = tp->tp_arg;

82 	const char	*path = "";

83 	int		 relativify;

85 	relativify = *url == '/' || strstr(url, "//") == NULL;

86 	if (relativify) {

87 		path = clt->clt_script_name;

88 		url++; /* skip leading / */

89 	}

90 !}

91 <figure>

92 	<a href="{{ path | urlescape }}{{ url | urlescape }}">

93 		<img src="{{ path | urlescape }}{{ url | urlescape }}" />

94 	</a>

95 	<figcaption>

96 		{{ label }}

97 	</figcaption>

98 </figure>

99 {{ end }}

101 {{ define tp_error(struct template *tp, const char *reason) }}

102 	{{ render tp_head(tp, "en", "Proxy error") }}

103 	<main>

104 		<h1>Proxy error</h1>

105 		<p>Unable to serve the page due to:</p>

106 		<pre>{{ reason }}</pre>

107 	</main>

108 	{{ render tp_foot(tp) }}

109 {{ end }}