mime_types: Make extension lookup case-insensitive

Not all extensions are but for image and video I know of none that
are case sensitive.

1 files changed, 2 insertions, 1 deletions

diff --git a/src/mime_types.cc b/src/mime_types.cc
index 1332f5a..dd8e3a7 100644
--- a/src/mime_types.cc
+++ b/src/mime_types.cc
@@ -1,6 +1,7 @@
 #include "common.hh"
 
 #include "mime_types.hh"
+#include "strutil.hh"
 
 #include <unordered_map>
 
@@ -20,7 +21,7 @@ std::unordered_map<std::string_view, std::string_view> kExtensionMap({
 }  // namespace
 
 std::string_view from_extension(std::string_view ext) {
-  auto it = kExtensionMap.find(ext);
+  auto it = kExtensionMap.find(str::to_lower_ascii(ext));
   if (it == kExtensionMap.end())
     return std::string_view();
   return it->second;