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344 lines
7.2 KiB
344 lines
7.2 KiB
/* html.c: helper functions for html output
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*
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* Copyright (C) 2006-2014 cgit Development Team <cgit@lists.zx2c4.com>
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*
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* Licensed under GNU General Public License v2
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* (see COPYING for full license text)
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*/
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#include "cgit.h"
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#include "html.h"
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#include "url.h"
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/* Percent-encoding of each character, except: a-zA-Z0-9!$()*,./:;@- */
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static const char* url_escape_table[256] = {
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"%00", "%01", "%02", "%03", "%04", "%05", "%06", "%07",
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"%08", "%09", "%0a", "%0b", "%0c", "%0d", "%0e", "%0f",
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"%10", "%11", "%12", "%13", "%14", "%15", "%16", "%17",
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"%18", "%19", "%1a", "%1b", "%1c", "%1d", "%1e", "%1f",
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"%20", NULL, "%22", "%23", NULL, "%25", "%26", "%27",
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NULL, NULL, NULL, "%2b", NULL, NULL, NULL, NULL,
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NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
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NULL, NULL, NULL, NULL, "%3c", "%3d", "%3e", "%3f",
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NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
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NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
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NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
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NULL, NULL, NULL, NULL, "%5c", NULL, "%5e", NULL,
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"%60", NULL, NULL, NULL, NULL, NULL, NULL, NULL,
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NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
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NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
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NULL, NULL, NULL, "%7b", "%7c", "%7d", NULL, "%7f",
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"%80", "%81", "%82", "%83", "%84", "%85", "%86", "%87",
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"%88", "%89", "%8a", "%8b", "%8c", "%8d", "%8e", "%8f",
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"%90", "%91", "%92", "%93", "%94", "%95", "%96", "%97",
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"%98", "%99", "%9a", "%9b", "%9c", "%9d", "%9e", "%9f",
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"%a0", "%a1", "%a2", "%a3", "%a4", "%a5", "%a6", "%a7",
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"%a8", "%a9", "%aa", "%ab", "%ac", "%ad", "%ae", "%af",
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"%b0", "%b1", "%b2", "%b3", "%b4", "%b5", "%b6", "%b7",
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"%b8", "%b9", "%ba", "%bb", "%bc", "%bd", "%be", "%bf",
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"%c0", "%c1", "%c2", "%c3", "%c4", "%c5", "%c6", "%c7",
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"%c8", "%c9", "%ca", "%cb", "%cc", "%cd", "%ce", "%cf",
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"%d0", "%d1", "%d2", "%d3", "%d4", "%d5", "%d6", "%d7",
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"%d8", "%d9", "%da", "%db", "%dc", "%dd", "%de", "%df",
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"%e0", "%e1", "%e2", "%e3", "%e4", "%e5", "%e6", "%e7",
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"%e8", "%e9", "%ea", "%eb", "%ec", "%ed", "%ee", "%ef",
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"%f0", "%f1", "%f2", "%f3", "%f4", "%f5", "%f6", "%f7",
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"%f8", "%f9", "%fa", "%fb", "%fc", "%fd", "%fe", "%ff"
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};
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char *fmt(const char *format, ...)
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{
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static char buf[8][1024];
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static int bufidx;
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int len;
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va_list args;
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bufidx++;
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bufidx &= 7;
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va_start(args, format);
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len = vsnprintf(buf[bufidx], sizeof(buf[bufidx]), format, args);
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va_end(args);
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if (len > sizeof(buf[bufidx])) {
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fprintf(stderr, "[html.c] string truncated: %s\n", format);
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exit(1);
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}
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return buf[bufidx];
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}
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char *fmtalloc(const char *format, ...)
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{
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struct strbuf sb = STRBUF_INIT;
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va_list args;
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va_start(args, format);
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strbuf_vaddf(&sb, format, args);
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va_end(args);
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return strbuf_detach(&sb, NULL);
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}
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void html_raw(const char *data, size_t size)
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{
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if (write(STDOUT_FILENO, data, size) != size)
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die_errno("write error on html output");
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}
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void html(const char *txt)
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{
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html_raw(txt, strlen(txt));
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}
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void htmlf(const char *format, ...)
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{
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va_list args;
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struct strbuf buf = STRBUF_INIT;
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va_start(args, format);
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strbuf_vaddf(&buf, format, args);
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va_end(args);
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html(buf.buf);
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strbuf_release(&buf);
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}
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void html_txtf(const char *format, ...)
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{
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va_list args;
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va_start(args, format);
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html_vtxtf(format, args);
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va_end(args);
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}
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void html_vtxtf(const char *format, va_list ap)
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{
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va_list cp;
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struct strbuf buf = STRBUF_INIT;
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va_copy(cp, ap);
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strbuf_vaddf(&buf, format, cp);
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va_end(cp);
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html_txt(buf.buf);
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strbuf_release(&buf);
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}
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void html_txt(const char *txt)
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{
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if (txt)
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html_ntxt(txt, strlen(txt));
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}
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ssize_t html_ntxt(const char *txt, size_t len)
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{
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const char *t = txt;
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ssize_t slen;
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if (len > SSIZE_MAX)
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return -1;
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slen = (ssize_t) len;
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while (t && *t && slen--) {
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int c = *t;
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if (c == '<' || c == '>' || c == '&') {
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html_raw(txt, t - txt);
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if (c == '>')
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html(">");
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else if (c == '<')
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html("<");
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else if (c == '&')
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html("&");
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txt = t + 1;
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}
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t++;
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}
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if (t != txt)
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html_raw(txt, t - txt);
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return slen;
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}
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void html_attrf(const char *fmt, ...)
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{
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va_list ap;
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struct strbuf sb = STRBUF_INIT;
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va_start(ap, fmt);
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strbuf_vaddf(&sb, fmt, ap);
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va_end(ap);
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html_attr(sb.buf);
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strbuf_release(&sb);
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}
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void html_attr(const char *txt)
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{
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const char *t = txt;
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while (t && *t) {
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int c = *t;
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if (c == '<' || c == '>' || c == '\'' || c == '\"' || c == '&') {
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html_raw(txt, t - txt);
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if (c == '>')
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html(">");
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else if (c == '<')
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html("<");
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else if (c == '\'')
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html("'");
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else if (c == '"')
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html(""");
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else if (c == '&')
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html("&");
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txt = t + 1;
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}
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t++;
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}
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if (t != txt)
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html(txt);
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}
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void html_url_path(const char *txt)
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{
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const char *t = txt;
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while (t && *t) {
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unsigned char c = *t;
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const char *e = url_escape_table[c];
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if (e && c != '+' && c != '&') {
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html_raw(txt, t - txt);
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html(e);
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txt = t + 1;
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}
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t++;
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}
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if (t != txt)
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html(txt);
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}
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void html_url_arg(const char *txt)
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{
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const char *t = txt;
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while (t && *t) {
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unsigned char c = *t;
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const char *e = url_escape_table[c];
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if (c == ' ')
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e = "+";
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if (e) {
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html_raw(txt, t - txt);
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html(e);
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txt = t + 1;
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}
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t++;
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}
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if (t != txt)
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html(txt);
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}
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void html_header_arg_in_quotes(const char *txt)
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{
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const char *t = txt;
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while (t && *t) {
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unsigned char c = *t;
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const char *e = NULL;
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if (c == '\\')
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e = "\\\\";
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else if (c == '\r')
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e = "\\r";
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else if (c == '\n')
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e = "\\n";
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else if (c == '"')
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e = "\\\"";
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if (e) {
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html_raw(txt, t - txt);
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html(e);
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txt = t + 1;
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}
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t++;
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}
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if (t != txt)
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html(txt);
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}
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void html_hidden(const char *name, const char *value)
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{
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html("<input type='hidden' name='");
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html_attr(name);
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html("' value='");
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html_attr(value);
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html("'/>");
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}
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void html_option(const char *value, const char *text, const char *selected_value)
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{
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html("<option value='");
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html_attr(value);
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html("'");
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if (selected_value && !strcmp(selected_value, value))
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html(" selected='selected'");
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html(">");
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html_txt(text);
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html("</option>\n");
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}
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void html_intoption(int value, const char *text, int selected_value)
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{
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htmlf("<option value='%d'%s>", value,
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value == selected_value ? " selected='selected'" : "");
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html_txt(text);
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html("</option>");
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}
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void html_link_open(const char *url, const char *title, const char *class)
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{
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html("<a href='");
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html_attr(url);
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if (title) {
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html("' title='");
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html_attr(title);
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}
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if (class) {
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html("' class='");
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html_attr(class);
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}
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html("'>");
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}
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void html_link_close(void)
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{
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html("</a>");
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}
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void html_fileperm(unsigned short mode)
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{
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htmlf("%c%c%c", (mode & 4 ? 'r' : '-'),
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(mode & 2 ? 'w' : '-'), (mode & 1 ? 'x' : '-'));
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}
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int html_include(const char *filename)
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{
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FILE *f;
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char buf[4096];
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size_t len;
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if (!(f = fopen(filename, "r"))) {
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fprintf(stderr, "[cgit] Failed to include file %s: %s (%d).\n",
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filename, strerror(errno), errno);
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return -1;
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}
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while ((len = fread(buf, 1, 4096, f)) > 0)
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html_raw(buf, len);
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fclose(f);
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return 0;
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}
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void http_parse_querystring(const char *txt, void (*fn)(const char *name, const char *value))
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{
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const char *t = txt;
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while (t && *t) {
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char *name = url_decode_parameter_name(&t);
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if (*name) {
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char *value = url_decode_parameter_value(&t);
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fn(name, value);
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free(value);
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}
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free(name);
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}
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}
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