1 /* html.c: helper functions for html output
3 * Copyright (C) 2006-2014 cgit Development Team <cgit@lists.zx2c4.com>
5 * Licensed under GNU General Public License v2
6 * (see COPYING for full license text)
18 /* Percent-encoding of each character, except: a-zA-Z0-9!$()*,./:;@- */
19 static const char* url_escape_table[256] = {
20 "%00", "%01", "%02", "%03", "%04", "%05", "%06", "%07",
21 "%08", "%09", "%0a", "%0b", "%0c", "%0d", "%0e", "%0f",
22 "%10", "%11", "%12", "%13", "%14", "%15", "%16", "%17",
23 "%18", "%19", "%1a", "%1b", "%1c", "%1d", "%1e", "%1f",
24 "%20", NULL, "%22", "%23", NULL, "%25", "%26", "%27",
25 NULL, NULL, NULL, "%2b", NULL, NULL, NULL, NULL,
26 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
27 NULL, NULL, NULL, NULL, "%3c", "%3d", "%3e", "%3f",
28 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
29 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
30 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
31 NULL, NULL, NULL, NULL, "%5c", NULL, "%5e", NULL,
32 "%60", NULL, NULL, NULL, NULL, NULL, NULL, NULL,
33 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
34 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
35 NULL, NULL, NULL, "%7b", "%7c", "%7d", NULL, "%7f",
36 "%80", "%81", "%82", "%83", "%84", "%85", "%86", "%87",
37 "%88", "%89", "%8a", "%8b", "%8c", "%8d", "%8e", "%8f",
38 "%90", "%91", "%92", "%93", "%94", "%95", "%96", "%97",
39 "%98", "%99", "%9a", "%9b", "%9c", "%9d", "%9e", "%9f",
40 "%a0", "%a1", "%a2", "%a3", "%a4", "%a5", "%a6", "%a7",
41 "%a8", "%a9", "%aa", "%ab", "%ac", "%ad", "%ae", "%af",
42 "%b0", "%b1", "%b2", "%b3", "%b4", "%b5", "%b6", "%b7",
43 "%b8", "%b9", "%ba", "%bb", "%bc", "%bd", "%be", "%bf",
44 "%c0", "%c1", "%c2", "%c3", "%c4", "%c5", "%c6", "%c7",
45 "%c8", "%c9", "%ca", "%cb", "%cc", "%cd", "%ce", "%cf",
46 "%d0", "%d1", "%d2", "%d3", "%d4", "%d5", "%d6", "%d7",
47 "%d8", "%d9", "%da", "%db", "%dc", "%dd", "%de", "%df",
48 "%e0", "%e1", "%e2", "%e3", "%e4", "%e5", "%e6", "%e7",
49 "%e8", "%e9", "%ea", "%eb", "%ec", "%ed", "%ee", "%ef",
50 "%f0", "%f1", "%f2", "%f3", "%f4", "%f5", "%f6", "%f7",
51 "%f8", "%f9", "%fa", "%fb", "%fc", "%fd", "%fe", "%ff"
54 char *fmt(const char *format, ...)
56 static char buf[8][1024];
64 va_start(args, format);
65 len = vsnprintf(buf[bufidx], sizeof(buf[bufidx]), format, args);
67 if (len > sizeof(buf[bufidx])) {
68 fprintf(stderr, "[html.c] string truncated: %s\n", format);
74 char *fmtalloc(const char *format, ...)
76 struct strbuf sb = STRBUF_INIT;
79 va_start(args, format);
80 strbuf_vaddf(&sb, format, args);
83 return strbuf_detach(&sb, NULL);
86 void html_raw(const char *data, size_t size)
88 if (write(STDOUT_FILENO, data, size) != size)
89 die_errno("write error on html output");
92 void html(const char *txt)
94 html_raw(txt, strlen(txt));
97 void htmlf(const char *format, ...)
100 struct strbuf buf = STRBUF_INIT;
102 va_start(args, format);
103 strbuf_vaddf(&buf, format, args);
106 strbuf_release(&buf);
109 void html_txtf(const char *format, ...)
113 va_start(args, format);
114 html_vtxtf(format, args);
118 void html_vtxtf(const char *format, va_list ap)
121 struct strbuf buf = STRBUF_INIT;
124 strbuf_vaddf(&buf, format, cp);
127 strbuf_release(&buf);
130 void html_status(int code, const char *msg, int more_headers)
132 htmlf("Status: %d %s\n", code, msg);
137 void html_txt(const char *txt)
142 if (c == '<' || c == '>' || c == '&') {
143 html_raw(txt, t - txt);
158 void html_ntxt(int len, const char *txt)
161 while (t && *t && len--) {
163 if (c == '<' || c == '>' || c == '&') {
164 html_raw(txt, t - txt);
176 html_raw(txt, t - txt);
181 void html_attrf(const char *fmt, ...)
184 struct strbuf sb = STRBUF_INIT;
187 strbuf_vaddf(&sb, fmt, ap);
194 void html_attr(const char *txt)
199 if (c == '<' || c == '>' || c == '\'' || c == '\"' || c == '&') {
200 html_raw(txt, t - txt);
219 void html_url_path(const char *txt)
223 unsigned char c = *t;
224 const char *e = url_escape_table[c];
225 if (e && c != '+' && c != '&') {
226 html_raw(txt, t - txt);
236 void html_url_arg(const char *txt)
240 unsigned char c = *t;
241 const char *e = url_escape_table[c];
245 html_raw(txt, t - txt);
255 void html_hidden(const char *name, const char *value)
257 html("<input type='hidden' name='");
264 void html_option(const char *value, const char *text, const char *selected_value)
266 html("<option value='");
269 if (selected_value && !strcmp(selected_value, value))
270 html(" selected='selected'");
276 void html_intoption(int value, const char *text, int selected_value)
278 htmlf("<option value='%d'%s>", value,
279 value == selected_value ? " selected='selected'" : "");
284 void html_link_open(const char *url, const char *title, const char *class)
299 void html_link_close(void)
304 void html_fileperm(unsigned short mode)
306 htmlf("%c%c%c", (mode & 4 ? 'r' : '-'),
307 (mode & 2 ? 'w' : '-'), (mode & 1 ? 'x' : '-'));
310 int html_include(const char *filename)
316 if (!(f = fopen(filename, "r"))) {
317 fprintf(stderr, "[cgit] Failed to include file %s: %s (%d).\n",
318 filename, strerror(errno), errno);
321 while ((len = fread(buf, 1, 4096, f)) > 0)
327 static int hextoint(char c)
329 if (c >= 'a' && c <= 'f')
331 else if (c >= 'A' && c <= 'F')
333 else if (c >= '0' && c <= '9')
339 static char *convert_query_hexchar(char *txt)
347 d1 = hextoint(*(txt + 1));
348 d2 = hextoint(*(txt + 2));
349 if (d1 < 0 || d2 < 0) {
350 memmove(txt, txt + 3, n - 2);
354 memmove(txt + 1, txt + 3, n - 2);
359 int http_parse_querystring(const char *txt_, void (*fn)(const char *name, const char *value))
361 char *o, *t, *txt, *value = NULL, c;
366 o = t = txt = xstrdup(txt_);
367 while ((c=*t) != '\0') {
371 } else if (c == '+') {
373 } else if (c == '%') {
374 t = convert_query_hexchar(t);
375 } else if (c == '&') {