Proper URI-encoding in InternalServer::build_redirect()

- Before this change `InternalServer::build_redirect()` only URI-encoded the
  article path, ignoring the book name and/or the root location components of
  the URL.

- In order to be able to test this fix, corner_cases.zim was renamed to
  contain a couple of special URL symbols in its filename. The
  `create_corner_cases_zim_file` script was updated accordingly.

src/server/internalServer.cpp

@@ -1030,9 +1030,8 @@ ParameterizedMessage suggestSearchMsg(const std::string& searchURL, const std::s
 std::unique_ptr<Response>
 InternalServer::build_redirect(const std::string& bookName, const zim::Item& item) const
 {
-  const auto path = kiwix::urlEncode(item.getPath());
-  const auto redirectUrl = m_root + "/content/" + bookName + "/" + path;
-  return Response::build_redirect(*this, redirectUrl);
+  const auto absPath = m_root + "/content/" + bookName + "/" + item.getPath();
+  return Response::build_redirect(*this, kiwix::urlEncode(absPath));
 }
 
 std::unique_ptr<Response> InternalServer::handle_content(const RequestContext& request)

test/data/create_corner_cases_zim_file

@@ -1,7 +1,24 @@
 #!/usr/bin/env bash
 
 cd "$(dirname "$0")"
-rm -f corner_cases.zim
+
+# The following symbols (that would be nice to include in testing) are not
+# allowed under NTFS and/or FAT32 filesystems, and would result in the
+# impossibility to git clone (or rather checkout) the libkiwix repository under
+# Windows:
+#
+#  ?
+#  =
+#  + (that's a pity, since the + symbol in a ZIM filename is replaced with the
+#     text 'plus' when the ZIM file is added to kiwix-serve's library and it
+#     would be nice to test that functionality)
+#
+# Assuming that tests are NOT run under Windows, above symbols can be included
+# in testing if the file is renamed while copying to the build directory (see
+# test/meson.build), though that would make maintenance slightly more confusing.
+zimfilename='corner_cases#&.zim'
+
+rm -f "$zimfilename"
 zimwriterfs --withoutFTIndex --dont-check-arguments \
             -w empty.html \
             -I empty.png \
@@ -11,6 +28,6 @@ zimwriterfs --withoutFTIndex --dont-check-arguments \
             -c "" \
             -p "" \
             corner_cases \
-            corner_cases.zim \
-&& echo 'corner_cases.zim was successfully created' \
-|| echo '!!! Failed to create corner_cases.zim !!!' >&2
+            "$zimfilename" \
+&& echo "$zimfilename was successfully created" \
+|| echo '!!! Failed to create' "$zimfilename" '!!!' >&2

test/meson.build

@@ -34,7 +34,7 @@ if gtest_dep.found() and not meson.is_cross_build()
       'example.zim',
       'zimfile.zim',
       'zimfile&other.zim',
-      'corner_cases.zim',
+      'corner_cases#&.zim',
       'poor.zim',
       'library.xml',
       'lib_for_server_search_test.xml',

test/server.cpp

@@ -166,9 +166,9 @@ const ResourceCollection resources200Uncompressible{
 
   { ZIM_CONTENT,     "/ROOT/content/zimfile/I/m/Ray_Charles_classic_piano_pose.jpg" },
 
-  { ZIM_CONTENT,     "/ROOT/content/corner_cases/empty.html" },
-  { ZIM_CONTENT,     "/ROOT/content/corner_cases/empty.css" },
-  { ZIM_CONTENT,     "/ROOT/content/corner_cases/empty.js" },
+  { ZIM_CONTENT,     "/ROOT/content/corner_cases%23%26/empty.html" },
+  { ZIM_CONTENT,     "/ROOT/content/corner_cases%23%26/empty.css" },
+  { ZIM_CONTENT,     "/ROOT/content/corner_cases%23%26/empty.js" },
 
 
   // The following url's responses are too small to be compressed
@@ -188,7 +188,7 @@ TEST(indexTemplateStringTest, emptyIndexTemplate) {
   const int PORT = 8001;
   const ZimFileServer::FilePathCollection ZIMFILES {
     "./test/zimfile.zim",
-    "./test/corner_cases.zim"
+    "./test/corner_cases#&.zim"
   };
 
   ZimFileServer zfs(PORT, ZimFileServer::DEFAULT_OPTIONS, ZIMFILES, "");
@@ -199,7 +199,7 @@ TEST(indexTemplateStringTest, indexTemplateCheck) {
   const int PORT = 8001;
   const ZimFileServer::FilePathCollection ZIMFILES {
     "./test/zimfile.zim",
-    "./test/corner_cases.zim"
+    "./test/corner_cases#&.zim"
   };
 
   ZimFileServer zfs(PORT, ZimFileServer::DEFAULT_OPTIONS, ZIMFILES, "<!DOCTYPE html><head>"
@@ -1291,10 +1291,10 @@ TEST_F(ServerTest, NonEndpointUrlsAreRedirectedToContentUrls)
 
 TEST_F(ServerTest, RedirectionsToURLsWithSpecialSymbols)
 {
-  auto g = zfs1_->GET("/ROOT/content/corner_cases/c_sharp.html");
+  auto g = zfs1_->GET("/ROOT/content/corner_cases%23%26/c_sharp.html");
   ASSERT_EQ(302, g->status);
   ASSERT_TRUE(g->has_header("Location"));
-  ASSERT_EQ(g->get_header_value("Location"), "/ROOT/content/corner_cases/c%23.html");
+  ASSERT_EQ(g->get_header_value("Location"), "/ROOT/content/corner_cases%23%26/c%23.html");
   ASSERT_EQ(getCacheControlHeader(*g), "max-age=0, must-revalidate");
   ASSERT_FALSE(g->has_header("ETag"));
 }
@@ -1611,7 +1611,7 @@ TEST_F(ServerTest, InvalidAndMultiRangeByteRangeRequestsResultIn416Responses)
 
 TEST_F(ServerTest, ValidByteRangeRequestsOfZeroSizedEntriesResultIn416Responses)
 {
-  const char url[] = "/ROOT/content/corner_cases/empty.js";
+  const char url[] = "/ROOT/content/corner_cases%23%26/empty.js";
 
   const char* ranges[] = {
     "bytes=0-",

test/server_search.cpp

@@ -1517,7 +1517,7 @@ TEST(ServerSearchTest, searchInMultilanguageBookSetIsDenied)
   const ZimFileServer::FilePathCollection ZIMFILES{
     "./test/zimfile.zim",       // eng
     "./test/example.zim",       // en
-    "./test/corner_cases.zim"   // =en
+    "./test/corner_cases#&.zim" // =en
   };
 
   ZimFileServer zfs(SERVER_PORT, ZimFileServer::DEFAULT_OPTIONS, ZIMFILES);

test/server_testing_tools.h

@@ -163,7 +163,7 @@ protected:
     "./test/zimfile.zim",
     "./test/example.zim",
     "./test/poor.zim",
-    "./test/corner_cases.zim"
+    "./test/corner_cases#&.zim"
   };
 
 protected: