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-rw-r--r--html.c84
1 files changed, 56 insertions, 28 deletions
diff --git a/html.c b/html.c
index d86b2c1..1305910 100644
--- a/html.c
+++ b/html.c
@@ -13,6 +13,32 @@
#include <string.h>
#include <errno.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", 0, "%22", "%23", 0, "%25", "%26", "%27", 0, 0, 0,
+ "%2b", 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, "%3c", "%3d",
+ "%3e", "%3f", 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, "%5c", 0, "%5e", 0, "%60", 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, "%7b",
+ "%7c", "%7d", 0, "%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"
+};
+
int htmlfd = STDOUT_FILENO;
char *fmt(const char *format, ...)
@@ -63,13 +89,13 @@ void html_status(int code, const char *msg, int more_headers)
html("\n");
}
-void html_txt(char *txt)
+void html_txt(const char *txt)
{
- char *t = txt;
+ const char *t = txt;
while(t && *t){
int c = *t;
if (c=='<' || c=='>' || c=='&') {
- write(htmlfd, txt, t - txt);
+ html_raw(txt, t - txt);
if (c=='>')
html("&gt;");
else if (c=='<')
@@ -84,13 +110,13 @@ void html_txt(char *txt)
html(txt);
}
-void html_ntxt(int len, char *txt)
+void html_ntxt(int len, const char *txt)
{
- char *t = txt;
+ const char *t = txt;
while(t && *t && len--){
int c = *t;
if (c=='<' || c=='>' || c=='&') {
- write(htmlfd, txt, t - txt);
+ html_raw(txt, t - txt);
if (c=='>')
html("&gt;");
else if (c=='<')
@@ -102,18 +128,18 @@ void html_ntxt(int len, char *txt)
t++;
}
if (t!=txt)
- write(htmlfd, txt, t - txt);
+ html_raw(txt, t - txt);
if (len<0)
html("...");
}
-void html_attr(char *txt)
+void html_attr(const char *txt)
{
- char *t = txt;
+ const char *t = txt;
while(t && *t){
int c = *t;
if (c=='<' || c=='>' || c=='\'' || c=='\"') {
- write(htmlfd, txt, t - txt);
+ html_raw(txt, t - txt);
if (c=='>')
html("&gt;");
else if (c=='<')
@@ -130,14 +156,15 @@ void html_attr(char *txt)
html(txt);
}
-void html_url_path(char *txt)
+void html_url_path(const char *txt)
{
- char *t = txt;
+ const char *t = txt;
while(t && *t){
int c = *t;
- if (c=='"' || c=='#' || c=='\'' || c=='?') {
- write(htmlfd, txt, t - txt);
- write(htmlfd, fmt("%%%2x", c), 3);
+ const char *e = url_escape_table[c];
+ if (e && c!='+' && c!='&' && c!='+') {
+ html_raw(txt, t - txt);
+ html_raw(e, 3);
txt = t+1;
}
t++;
@@ -146,14 +173,15 @@ void html_url_path(char *txt)
html(txt);
}
-void html_url_arg(char *txt)
+void html_url_arg(const char *txt)
{
- char *t = txt;
+ const char *t = txt;
while(t && *t){
int c = *t;
- if (c=='"' || c=='#' || c=='%' || c=='&' || c=='\'' || c=='+' || c=='?') {
- write(htmlfd, txt, t - txt);
- write(htmlfd, fmt("%%%2x", c), 3);
+ const char *e = url_escape_table[c];
+ if (e) {
+ html_raw(txt, t - txt);
+ html_raw(e, 3);
txt = t+1;
}
t++;
@@ -162,7 +190,7 @@ void html_url_arg(char *txt)
html(txt);
}
-void html_hidden(char *name, char *value)
+void html_hidden(const char *name, const char *value)
{
html("<input type='hidden' name='");
html_attr(name);
@@ -171,7 +199,7 @@ void html_hidden(char *name, char *value)
html("'/>");
}
-void html_option(char *value, char *text, char *selected_value)
+void html_option(const char *value, const char *text, const char *selected_value)
{
html("<option value='");
html_attr(value);
@@ -183,7 +211,7 @@ void html_option(char *value, char *text, char *selected_value)
html("</option>\n");
}
-void html_link_open(char *url, char *title, char *class)
+void html_link_open(const char *url, const char *title, const char *class)
{
html("<a href='");
html_attr(url);
@@ -221,7 +249,7 @@ int html_include(const char *filename)
return -1;
}
while((len = fread(buf, 1, 4096, f)) > 0)
- write(htmlfd, buf, len);
+ html_raw(buf, len);
fclose(f);
return 0;
}
@@ -258,14 +286,14 @@ char *convert_query_hexchar(char *txt)
}
}
-int http_parse_querystring(char *txt, void (*fn)(const char *name, const char *value))
+int http_parse_querystring(const char *txt_, void (*fn)(const char *name, const char *value))
{
- char *t, *value = NULL, c;
+ char *t, *txt, *value = NULL, c;
- if (!txt)
+ if (!txt_)
return 0;
- t = txt = strdup(txt);
+ t = txt = strdup(txt_);
if (t == NULL) {
printf("Out of memory\n");
exit(1);