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