commit - ac07537e50ff7dce0e15a73d32c693c631c42844
commit + 05307fba348df783365077ec79f5af0279218daf
blob - 66a56b52d0b63ea301809a6d755c51735d4ce05c
blob + f5a9446bb7a163bd0e27552e7d77ae26c8e1aaab
--- tests/test_parse_url.cc
+++ tests/test_parse_url.cc
@@ -40,6 +40,7 @@ TEST_START(test_parse_url)
     IS_TRUE(parse_url(cut_null("gemini:/"), zs_url_path) == url_too_short);
 
     IS_TRUE(parse_url(cut_null("gemini1://"), zs_url_path) == url_non_gemini);
+    IS_TRUE(parse_url(cut_null("semini://"), zs_url_path) == url_non_gemini);
 
     IS_TRUE(parse_url(cut_null("gemini://host/../secret.txt"), zs_url_path) == url_root_traverse);
     IS_TRUE(parse_url(cut_null("gemini://host/dir/../../secret.txt"), zs_url_path) == url_root_traverse);
blob - 1ae1d8316e4b4cc89f93d82c35e39aa3dbbc9564
blob + 986a8632198ea80a95b2590c2c99dfd5ce756a35
--- vostok/parse_url.cc
+++ vostok/parse_url.cc
@@ -4,6 +4,7 @@
 #include "error.h"
 
 #include <list>
+#include <cctype>
 
 
 namespace vostok
@@ -13,8 +14,16 @@ namespace
 {
 
 const auto gemini_scheme = cut_null("gemini://");
+inline bool is_gemini_scheme(span<const char> url)
+{
+    return std::equal(
+        gemini_scheme.begin(),
+        gemini_scheme.end(),
+        url.begin(),
+        [](char v1, char v2){return std::tolower(v1) == std::tolower(v2);}
+    );
+}
 
-
 class path_normalization
 {
 public:
@@ -110,7 +119,7 @@ url_normalization_result parse_url(span<const char> ur
     // check and skip scheme
     if (url.size() < gemini_scheme.size())
         return url_too_short;
-    if (!std::equal(gemini_scheme.begin(), gemini_scheme.end(), url.begin()))
+    if (!is_gemini_scheme(url))
         return url_non_gemini;
     url = url.subspan(gemini_scheme.size());