/* 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 (write(STDOUT_FILENO, data, size) != 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("&gt;");			else if (c == '<')				html("&lt;");			else if (c == '&')				html("&amp;");			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("&gt;");			else if (c == '<')				html("&lt;");			else if (c == '\'')				html("&#x27;");			else if (c == '"')				html("&quot;");			else if (c == '&')				html("&amp;");			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);	}}