X-Git-Url: https://gitweb.ps.run/ps-cgit/blobdiff_plain/8aab27f24de70acfbdcee31c634a4b1facf23b92..1415f3f3e017d0123e850707c55cb7e5e5887406:/html.c

diff --git a/html.c b/html.c
index 4033200..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, ...)
@@ -69,7 +95,7 @@ void html_txt(const char *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=='<')
@@ -90,7 +116,7 @@ void html_ntxt(int len, const char *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=='<')
@@ -102,7 +128,7 @@ void html_ntxt(int len, const char *txt)
 		t++;
 	}
 	if (t!=txt)
-		write(htmlfd, txt, t - txt);
+		html_raw(txt, t - txt);
 	if (len<0)
 		html("...");
 }
@@ -113,7 +139,7 @@ void html_attr(const char *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=='<')
@@ -135,9 +161,10 @@ void html_url_path(const char *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++;
@@ -151,9 +178,10 @@ void html_url_arg(const char *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++;
@@ -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;
 }
@@ -240,19 +268,20 @@ int hextoint(char c)
 
 char *convert_query_hexchar(char *txt)
 {
-	int d1, d2;
-	if (strlen(txt) < 3) {
+	int d1, d2, n;
+	n = strlen(txt);
+	if (n < 3) {
 		*txt = '\0';
 		return txt-1;
 	}
 	d1 = hextoint(*(txt+1));
 	d2 = hextoint(*(txt+2));
 	if (d1<0 || d2<0) {
-		strcpy(txt, txt+3);
+		memmove(txt, txt+3, n-3);
 		return txt-1;
 	} else {
 		*txt = d1 * 16 + d2;
-		strcpy(txt+1, txt+3);
+		memmove(txt+1, txt+3, n-2);
 		return txt;
 	}
 }