File httpfs-URL of Package httpfs

# HG changeset patch
# User Michal Suchánek <msuchanek@suse.de>
# Date 1676322135 -3600
#      Mon Feb 13 22:02:15 2023 +0100
# Node ID 995982d79044d301e8f39a81928185c9a1dd869d
# Parent  068c0fd6d16b7339a05e43231fb5166d825e781a
Add URL encoding https://sourceforge.net/p/httpfs/patches/2/

diff -r 068c0fd6d16b -r 995982d79044 httpfs2.c
--- a/httpfs2.c	Mon May 30 22:49:38 2022 +0300
+++ b/httpfs2.c	Mon Feb 13 22:02:15 2023 +0100
@@ -45,6 +45,8 @@
 #include <stddef.h>
 #include <inttypes.h>
 
+#define ENCODE_MODE_PATH 1
+
 #ifdef USE_THREAD
 #include <pthread.h>
 static pthread_key_t url_key;
@@ -694,10 +696,67 @@
     errno = e;
 }
 
-static char * url_encode(char * path) {
-    return strdup(path); /*FIXME encode*/
+
+/*
+ * VERSION 2
+ *
+ * Behavior   - never encodes reserved charecters if ENCODE_MODE_PATH is used.
+ *            - never encodes allowd characters.
+ *            - never encodes a-zA-Z0-9
+ *
+ * required   - define ENCODE_MODE_PATH
+ * use        - url_encode("some/path",ENCODE_MODE_PATH)
+ *
+ *
+ * url_encode - Returns a pointer to url encoded character string accordning to rules:
+ *              Returned pointer needs to be freed by user.
+ * params     - path : path to be encoded
+ *            - mode : mode to use while encoding. Added ENCODE_MODE_PATH, use it
+ *                     to encode paths. It will not convert reserved '/' characters.
+ *
+ * contributed by Arek Bochinski http://zenebo.com/word
+ */
+static char * url_encode(char * path, int mode)
+{
+    int i, j = 0;
+    char * hex_table = "0123456789ABCDEF";
+    char * allowed = "$-_.+!*'(),";
+    char * reserved = ";/?:@=&";
+    unsigned char c;
+    size_t len = strlen(path);
+    char * dest = malloc(3 * len + 1);
+
+    if (!dest)
+        return dest;
+
+    for(i = 0; i < len; i++)
+    {
+        c = (unsigned char) path[i];
+
+        if(
+                ((c >= 'a') && (c <= 'z')) ||
+                ((c >= 'A') && (c <= 'Z')) ||
+                ((c >= '0') && (c <= '9')) ||
+                (strchr(allowed, c) != NULL) ||
+                ((mode == ENCODE_MODE_PATH) && (strchr(reserved, c) != NULL))
+          )
+        {
+            dest[i + j] = path[i];
+        }
+        else
+        {
+            dest[i + j]     = '%';
+            dest[i + j + 1] = hex_table[c / 16];
+            dest[i + j + 2] = hex_table[c % 16];
+
+            j += 2;
+        }
+    }
+
+    return dest;
 }
 
+
 /*
  * functions for handling struct_url
  */
@@ -813,7 +872,7 @@
     if(res->path)
         free(res->path);
     if(strchr(url, path_start))
-        res->path = url_encode(strchr(url, path_start));
+        res->path = url_encode(strchr(url, path_start), ENCODE_MODE_PATH);
     else{
         path_start = 0;
         res->path = strdup("/");