From 5817f82ba852fd72466dea176548c5cedfad677a Mon Sep 17 00:00:00 2001
From: John Mark Bell <jmb@netsurf-browser.org>
Date: Sun, 26 Jun 2005 22:18:37 +0000
Subject: [project @ 2005-06-26 22:18:37 by jmb] Improve clarity of use of
 utf8_to_enc. Remove use of curl_escape - url_escape does similar things, just
 better.

svn path=/import/netsurf/; revision=1766
---
 render/form.c | 46 +++++++++++++++++++++++++++++++++++++---------
 utils/url.c   | 49 +++++++++++++++++++++++++++++++++++++++++++++++++
 utils/url.h   |  1 +
 3 files changed, 87 insertions(+), 9 deletions(-)

diff --git a/render/form.c b/render/form.c
index e20fb658f..6af143be0 100644
--- a/render/form.c
+++ b/render/form.c
@@ -16,10 +16,10 @@
 #include <stdbool.h>
 #include <stdio.h>
 #include <string.h>
-#include "curl/curl.h"
 #include "netsurf/render/box.h"
 #include "netsurf/render/form.h"
 #include "netsurf/utils/log.h"
+#include "netsurf/utils/url.h"
 #include "netsurf/utils/utf8.h"
 #include "netsurf/utils/utils.h"
 
@@ -497,6 +497,7 @@ char *form_url_encode(struct form *form,
 	char *charset;
 	unsigned int len = 0, len1;
 	utf8_convert_ret err;
+	url_func_result url_err;
 
 	if (!s)
 		return 0;
@@ -517,11 +518,14 @@ char *form_url_encode(struct form *form,
 				err = utf8_to_enc(control->name,
 						"ISO-8859-1", 0, &n_temp);
 		}
-		if (err != UTF8_CONVERT_OK) {
+		if (err == UTF8_CONVERT_NOMEM) {
 			free(charset);
 			free(s);
 			return 0;
 		}
+
+		assert(err == UTF8_CONVERT_OK);
+
 		err = utf8_to_enc(control->value, charset, 0, &v_temp);
 		if (err == UTF8_CONVERT_BADENC) {
 			err = utf8_to_enc(control->value,
@@ -530,19 +534,43 @@ char *form_url_encode(struct form *form,
 				err = utf8_to_enc(control->value,
 						"ISO-8859-1", 0, &v_temp);
 		}
-		if (err != UTF8_CONVERT_OK) {
+		if (err == UTF8_CONVERT_NOMEM) {
+			free(n_temp);
+			free(charset);
+			free(s);
+			return 0;
+		}
+
+		assert(err == UTF8_CONVERT_OK);
+
+		url_err = url_escape(n_temp, &name);
+		if (url_err == URL_FUNC_NOMEM) {
+			free(v_temp);
+			free(n_temp);
+			free(charset);
+			free(s);
+			return 0;
+		}
+
+		assert(url_err == URL_FUNC_OK);
+
+		url_err = url_escape(v_temp, &value);
+		if (url_err == URL_FUNC_NOMEM) {
+			free(name);
+			free(v_temp);
 			free(n_temp);
 			free(charset);
 			free(s);
 			return 0;
 		}
-		name = curl_escape(n_temp, 0);
-		value = curl_escape(v_temp, 0);
+
+		assert(url_err == URL_FUNC_OK);
+
 		len1 = len + strlen(name) + strlen(value) + 2;
 		s2 = realloc(s, len1 + 1);
 		if (!s2) {
-			curl_free(value);
-			curl_free(name);
+			free(value);
+			free(name);
 			free(v_temp);
 			free(n_temp);
 			free(charset);
@@ -552,8 +580,8 @@ char *form_url_encode(struct form *form,
 		s = s2;
 		sprintf(s + len, "%s=%s&", name, value);
 		len = len1;
-		curl_free(name);
-		curl_free(value);
+		free(name);
+		free(value);
 		free(v_temp);
 		free(n_temp);
 	}
diff --git a/utils/url.c b/utils/url.c
index fa3d0dd8d..d94c5fad3 100644
--- a/utils/url.c
+++ b/utils/url.c
@@ -595,7 +595,56 @@ url_func_result url_nice(const char *url, char **result)
 	return URL_FUNC_OK;
 }
 
+/**
+ * Escape a string suitable for inclusion in an URI
+ *
+ * \param unescaped  The unescaped string
+ * \param result  Pointer to location to store escaped string
+ * \return URL_FUNC_OK on success
+ */
+url_func_result url_escape(const char *unescaped, char **result)
+{
+	int len;
+	char *escaped, *d;
+	const char *c;
+
+	if (!unescaped || !result)
+		return URL_FUNC_FAILED;
+
+	*result = NULL;
+
+	len = strlen(unescaped);
+
+	escaped = malloc(len * 3 + 1);
+	if (!escaped)
+		return URL_FUNC_NOMEM;
 
+	for (c = unescaped, d = escaped; *c; c++) {
+		if (!isascii(*c) ||
+				strchr(";/?:@&=+$," "<>#%\"{}|\\^[]`", *c) ||
+				*c <= 0x20 || *c == 0x7f) {
+			*d++ = '%';
+			*d++ = "0123456789ABCDEF"[((*c >> 4) & 0xf)];
+			*d++ = "0123456789ABCDEF"[(*c & 0xf)];
+		}
+		else {
+			/* unreserved characters: [a-zA-Z0-9-_.!~*'()] */
+			*d++ = *c;
+		}
+	}
+
+	(*result) = malloc(++d - escaped + 1);
+	if (!(*result)) {
+		free(escaped);
+		return URL_FUNC_NOMEM;
+	}
+	snprintf((*result), d - escaped, "%s", escaped);
+	(*result)[d - escaped] = '\0';
+
+	free(escaped);
+
+	return URL_FUNC_OK;
+}
 
 #ifdef TEST
 
diff --git a/utils/url.h b/utils/url.h
index 8ebc1e3f2..d803eafeb 100644
--- a/utils/url.h
+++ b/utils/url.h
@@ -25,5 +25,6 @@ url_func_result url_join(const char *rel, const char *base, char **result);
 url_func_result url_host(const char *url, char **result);
 url_func_result url_scheme(const char *url, char **result);
 url_func_result url_nice(const char *url, char **result);
+url_func_result url_escape(const char *unescaped, char **result);
 
 #endif
-- 
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