summaryrefslogtreecommitdiff
path: root/sfeed_atom.c
blob: 844bd2ed15509c35c1d1399e0096a6e33c3994ff (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
#include <sys/types.h>

#include <err.h>
#include <stdio.h>
#include <string.h>
#include <time.h>

#include "util.h"

static char *line;
static size_t linesize;

static void
printcontent(const char *s)
{
	for (; *s; ++s) {
		switch (*s) {
		case '<':  fputs("&lt;",   stdout); break;
		case '>':  fputs("&gt;",   stdout); break;
		case '\'': fputs("&#39;",  stdout); break;
		case '&':  fputs("&amp;",  stdout); break;
		case '"':  fputs("&quot;", stdout); break;
		case '\\':
			s++;
			switch (*s) {
			case 'n':  putchar('\n'); break;
			case '\\': putchar('\\'); break;
			case 't':  putchar('\t'); break;
			}
			break;
		default:  putchar(*s);
		}
	}
}

static void
printfeed(FILE *fp, const char *feedname)
{
	char *fields[FieldLast];
	struct tm *tm;
	time_t parsedtime;
	ssize_t linelen;

	while ((linelen = getline(&line, &linesize, fp)) > 0) {
		if (line[linelen - 1] == '\n')
			line[--linelen] = '\0';
		if (!parseline(line, fields))
			break;

		parsedtime = 0;
		if (strtotime(fields[FieldUnixTimestamp], &parsedtime))
			continue;
		if (!(tm = localtime(&parsedtime)))
			err(1, "localtime");

		fputs("<entry>\n\t<title>", stdout);
		if (feedname[0]) {
			fputs("[", stdout);
			xmlencode(feedname, stdout);
			fputs("] ", stdout);
		}
		xmlencode(fields[FieldTitle], stdout);
		fputs("</title>\n", stdout);
		if (fields[FieldLink][0]) {
			fputs("\t<link rel=\"alternate\" href=\"", stdout);
			xmlencode(fields[FieldLink], stdout);
			fputs("\" />\n", stdout);
		}
		if (fields[FieldEnclosure][0]) {
			fputs("\t<link rel=\"enclosure\" href=\"", stdout);
			xmlencode(fields[FieldEnclosure], stdout);
			fputs("\" />\n", stdout);
		}
		fprintf(stdout, "\t<published>%04d-%02d-%02dT%02d:%02d:%02dZ</published>\n",
		        tm->tm_year + 1900, tm->tm_mon + 1, tm->tm_mday,
		        tm->tm_hour, tm->tm_min, tm->tm_sec);
		if (fields[FieldAuthor][0]) {
			fputs("\t<author><name>", stdout);
			xmlencode(fields[FieldAuthor], stdout);
			fputs("</name></author>\n", stdout);
		}
		if (fields[FieldContent][0]) {
			if (!strcmp(fields[FieldContentType], "html")) {
				fputs("\t<content type=\"html\">", stdout);
			} else {
				/* NOTE: an RSS/Atom viewer may or may not format
				   whitespace such as newlines.
				   Workaround: type="html" and <![CDATA[<pre></pre>]]> */
				fputs("\t<content type=\"text\">", stdout);
			}
			printcontent(fields[FieldContent]);
			fputs("</content>\n", stdout);
		}
		fputs("</entry>\n", stdout);
	}
}

int
main(int argc, char *argv[])
{
	FILE *fp;
	char *name;
	int i;

	if (argc == 1) {
		if (pledge("stdio", NULL) == -1)
			err(1, "pledge");
	} else {
		if (pledge("stdio rpath", NULL) == -1)
			err(1, "pledge");
	}

	fputs("<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n"
	      "<feed xmlns=\"http://www.w3.org/2005/Atom\" xml:lang=\"en\">\n",
	      stdout);

	if (argc == 1) {
		printfeed(stdin, "");
	} else {
		for (i = 1; i < argc; i++) {
			if (!(fp = fopen(argv[i], "r")))
				err(1, "fopen: %s", argv[i]);
			name = ((name = strrchr(argv[i], '/'))) ? name + 1 : argv[i];
			printfeed(fp, name);
			if (ferror(fp))
				err(1, "ferror: %s", argv[i]);
			fclose(fp);
		}
	}

	fputs("</feed>\n", stdout);

	return 0;
}