diff --git a/bin/webs.c b/bin/webs.c
index 08cb3fa..1d8b2a6 100644
--- a/bin/webs.c
+++ b/bin/webs.c
@@ -76,7 +76,6 @@ static int process_http_request (hio_svc_htts_t* htts, hio_dev_sck_t* csck, hio_
 	mth = hio_htre_getqmethodtype(req);
 	qpath = hio_htre_getqpath(req);
 
-
 	if (mth == HIO_HTTP_OTHER && hio_comp_bcstr(hio_htre_getqmethodname(req), "UNTAR", 1) == 0)
 	{
 		/* don't care about the path for now. TODO: make this secure and reasonable */
@@ -85,11 +84,7 @@ static int process_http_request (hio_svc_htts_t* htts, hio_dev_sck_t* csck, hio_
 	else // if (mth == HIO_HTTP_GET || mth == HIO_HTTP_POST)
 	{
 		/* TODO: proper mime-type */
-		const hio_bch_t* dot;
-		hio_bch_t mt[128];
-		dot = hio_rfind_bchar_in_bcstr(qpath, '.');
-		hio_fmttobcstr (hio, mt, HIO_COUNTOF(mt), "text/%hs", ((dot && dot[1] != '\0')? &dot[1]: "html")); /* TODO: error check */
-		if (hio_svc_htts_dofile(htts, csck, req, ext->docroot, qpath, mt, 0) <= -1) goto oops;
+		if (hio_svc_htts_dofile(htts, csck, req, ext->docroot, qpath, HIO_NULL, 0) <= -1) goto oops;
 	}
 #if 0
 	else
@@ -152,12 +147,12 @@ static void handle_sigint (int sig)
 int main (int argc, char* argv[])
 {
 	hio_t* hio = HIO_NULL;
-	hio_oow_t i;
 	struct sigaction sigact;
 	int xret = -1;
 
 #if 0
-	
+	hio_oow_t i;
+
 // TODO: use getopt() or something similar
 	for (i = 1; i < argc; )
 	{
diff --git a/lib/Makefile.am b/lib/Makefile.am
index 375ff55..8c70cf7 100644
--- a/lib/Makefile.am
+++ b/lib/Makefile.am
@@ -118,6 +118,7 @@ libhio_la_SOURCES = \
 	tmr.c \
 	utf8.c \
 	utl.c \
+	utl-mime.c \
 	utl-siph.c \
 	utl-str.c
 
diff --git a/lib/Makefile.in b/lib/Makefile.in
index 8d5fc58..7b15bb3 100644
--- a/lib/Makefile.in
+++ b/lib/Makefile.in
@@ -154,7 +154,8 @@ am__libhio_la_SOURCES_DIST = chr.c dhcp-svr.c dns.c dns-cli.c ecs.c \
 	nwif.c opt.c opt-imp.h path.c pipe.c pro.c pty.c rad-msg.c \
 	sck.c shw.c skad.c sys.c sys-ass.c sys-err.c sys-log.c \
 	sys-mux.c sys-prv.h sys-tim.c thr.c uch-case.h uch-prop.h \
-	tar.c tmr.c utf8.c utl.c utl-siph.c utl-str.c mar.c mar-cli.c
+	tar.c tmr.c utf8.c utl.c utl-mime.c utl-siph.c utl-str.c mar.c \
+	mar-cli.c
 @ENABLE_MARIADB_TRUE@am__objects_1 = libhio_la-mar.lo \
 @ENABLE_MARIADB_TRUE@	libhio_la-mar-cli.lo
 am_libhio_la_OBJECTS = libhio_la-chr.lo libhio_la-dhcp-svr.lo \
@@ -171,8 +172,8 @@ am_libhio_la_OBJECTS = libhio_la-chr.lo libhio_la-dhcp-svr.lo \
 	libhio_la-sys.lo libhio_la-sys-ass.lo libhio_la-sys-err.lo \
 	libhio_la-sys-log.lo libhio_la-sys-mux.lo libhio_la-sys-tim.lo \
 	libhio_la-thr.lo libhio_la-tar.lo libhio_la-tmr.lo \
-	libhio_la-utf8.lo libhio_la-utl.lo libhio_la-utl-siph.lo \
-	libhio_la-utl-str.lo $(am__objects_1)
+	libhio_la-utf8.lo libhio_la-utl.lo libhio_la-utl-mime.lo \
+	libhio_la-utl-siph.lo libhio_la-utl-str.lo $(am__objects_1)
 libhio_la_OBJECTS = $(am_libhio_la_OBJECTS)
 AM_V_lt = $(am__v_lt_@AM_V@)
 am__v_lt_ = $(am__v_lt_@AM_DEFAULT_V@)
@@ -228,6 +229,7 @@ am__depfiles_remade = ./$(DEPDIR)/libhio_la-chr.Plo \
 	./$(DEPDIR)/libhio_la-sys.Plo ./$(DEPDIR)/libhio_la-tar.Plo \
 	./$(DEPDIR)/libhio_la-thr.Plo ./$(DEPDIR)/libhio_la-tmr.Plo \
 	./$(DEPDIR)/libhio_la-utf8.Plo \
+	./$(DEPDIR)/libhio_la-utl-mime.Plo \
 	./$(DEPDIR)/libhio_la-utl-siph.Plo \
 	./$(DEPDIR)/libhio_la-utl-str.Plo \
 	./$(DEPDIR)/libhio_la-utl.Plo
@@ -474,7 +476,7 @@ libhio_la_SOURCES = chr.c dhcp-svr.c dns.c dns-cli.c ecs.c ecs-imp.h \
 	opt.c opt-imp.h path.c pipe.c pro.c pty.c rad-msg.c sck.c \
 	shw.c skad.c sys.c sys-ass.c sys-err.c sys-log.c sys-mux.c \
 	sys-prv.h sys-tim.c thr.c uch-case.h uch-prop.h tar.c tmr.c \
-	utf8.c utl.c utl-siph.c utl-str.c $(am__append_2)
+	utf8.c utl.c utl-mime.c utl-siph.c utl-str.c $(am__append_2)
 libhio_la_CPPFLAGS = $(CPPFLAGS_LIB_COMMON)
 libhio_la_CFLAGS = $(CFLAGS_LIB_COMMON) $(am__append_3)
 libhio_la_LDFLAGS = $(LDFLAGS_LIB_COMMON) $(am__append_4)
@@ -617,6 +619,7 @@ distclean-compile:
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libhio_la-thr.Plo@am__quote@ # am--include-marker
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libhio_la-tmr.Plo@am__quote@ # am--include-marker
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libhio_la-utf8.Plo@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libhio_la-utl-mime.Plo@am__quote@ # am--include-marker
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libhio_la-utl-siph.Plo@am__quote@ # am--include-marker
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libhio_la-utl-str.Plo@am__quote@ # am--include-marker
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libhio_la-utl.Plo@am__quote@ # am--include-marker
@@ -945,6 +948,13 @@ libhio_la-utl.lo: utl.c
 @AMDEP_TRUE@@am__fastdepCC_FALSE@	DEPDIR=$(DEPDIR) $(CCDEPMODE) $(depcomp) @AMDEPBACKSLASH@
 @am__fastdepCC_FALSE@	$(AM_V_CC@am__nodep@)$(LIBTOOL) $(AM_V_lt) --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=compile $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(libhio_la_CPPFLAGS) $(CPPFLAGS) $(libhio_la_CFLAGS) $(CFLAGS) -c -o libhio_la-utl.lo `test -f 'utl.c' || echo '$(srcdir)/'`utl.c
 
+libhio_la-utl-mime.lo: utl-mime.c
+@am__fastdepCC_TRUE@	$(AM_V_CC)$(LIBTOOL) $(AM_V_lt) --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=compile $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(libhio_la_CPPFLAGS) $(CPPFLAGS) $(libhio_la_CFLAGS) $(CFLAGS) -MT libhio_la-utl-mime.lo -MD -MP -MF $(DEPDIR)/libhio_la-utl-mime.Tpo -c -o libhio_la-utl-mime.lo `test -f 'utl-mime.c' || echo '$(srcdir)/'`utl-mime.c
+@am__fastdepCC_TRUE@	$(AM_V_at)$(am__mv) $(DEPDIR)/libhio_la-utl-mime.Tpo $(DEPDIR)/libhio_la-utl-mime.Plo
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	$(AM_V_CC)source='utl-mime.c' object='libhio_la-utl-mime.lo' libtool=yes @AMDEPBACKSLASH@
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	DEPDIR=$(DEPDIR) $(CCDEPMODE) $(depcomp) @AMDEPBACKSLASH@
+@am__fastdepCC_FALSE@	$(AM_V_CC@am__nodep@)$(LIBTOOL) $(AM_V_lt) --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=compile $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(libhio_la_CPPFLAGS) $(CPPFLAGS) $(libhio_la_CFLAGS) $(CFLAGS) -c -o libhio_la-utl-mime.lo `test -f 'utl-mime.c' || echo '$(srcdir)/'`utl-mime.c
+
 libhio_la-utl-siph.lo: utl-siph.c
 @am__fastdepCC_TRUE@	$(AM_V_CC)$(LIBTOOL) $(AM_V_lt) --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=compile $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(libhio_la_CPPFLAGS) $(CPPFLAGS) $(libhio_la_CFLAGS) $(CFLAGS) -MT libhio_la-utl-siph.lo -MD -MP -MF $(DEPDIR)/libhio_la-utl-siph.Tpo -c -o libhio_la-utl-siph.lo `test -f 'utl-siph.c' || echo '$(srcdir)/'`utl-siph.c
 @am__fastdepCC_TRUE@	$(AM_V_at)$(am__mv) $(DEPDIR)/libhio_la-utl-siph.Tpo $(DEPDIR)/libhio_la-utl-siph.Plo
@@ -1175,6 +1185,7 @@ distclean: distclean-am
 	-rm -f ./$(DEPDIR)/libhio_la-thr.Plo
 	-rm -f ./$(DEPDIR)/libhio_la-tmr.Plo
 	-rm -f ./$(DEPDIR)/libhio_la-utf8.Plo
+	-rm -f ./$(DEPDIR)/libhio_la-utl-mime.Plo
 	-rm -f ./$(DEPDIR)/libhio_la-utl-siph.Plo
 	-rm -f ./$(DEPDIR)/libhio_la-utl-str.Plo
 	-rm -f ./$(DEPDIR)/libhio_la-utl.Plo
@@ -1267,6 +1278,7 @@ maintainer-clean: maintainer-clean-am
 	-rm -f ./$(DEPDIR)/libhio_la-thr.Plo
 	-rm -f ./$(DEPDIR)/libhio_la-tmr.Plo
 	-rm -f ./$(DEPDIR)/libhio_la-utf8.Plo
+	-rm -f ./$(DEPDIR)/libhio_la-utl-mime.Plo
 	-rm -f ./$(DEPDIR)/libhio_la-utl-siph.Plo
 	-rm -f ./$(DEPDIR)/libhio_la-utl-str.Plo
 	-rm -f ./$(DEPDIR)/libhio_la-utl.Plo
diff --git a/lib/hio-utl.h b/lib/hio-utl.h
index 1554957..52c7b5b 100644
--- a/lib/hio-utl.h
+++ b/lib/hio-utl.h
@@ -224,6 +224,22 @@
 #define HIO_HASH_UCSTR(hv, ptr) HIO_HASH_VPTR(hv, ptr, const hio_uch_t)
 #define HIO_HASH_MORE_UCSTR(hv, ptr) HIO_HASH_MORE_VPTR(hv, ptr, const hio_uch_t)
 
+
+/* =========================================================================
+ * MIME TYPE ENTRY
+ * ========================================================================= */
+struct hio_mime_type_t
+{
+	const hio_bch_t* ext;
+	const hio_bch_t* type;
+};
+
+typedef struct hio_mime_type_t hio_mime_type_t;
+
+#if defined(__cplusplus)
+extern "C" {
+#endif
+
 /* =========================================================================
  * STRING
  * ========================================================================= */
@@ -652,7 +668,6 @@ static HIO_INLINE hio_uint128_t hio_bswap128 (hio_uint128_t x)
 #	error UNKNOWN ENDIAN
 #endif
 
-
 /* =========================================================================
  * SIP-HASH-PRF
  * ========================================================================= */
@@ -663,4 +678,15 @@ HIO_EXPORT void hio_sip_hash_24 (
 	hio_uint8_t         out[8]
 );
 
+/* =========================================================================
+ * mime-type by extension
+ * ========================================================================= */
+HIO_EXPORT const hio_bch_t* hio_get_mime_type_by_ext (
+	const hio_bch_t* ext
+);
+
+#if defined(__cplusplus)
+}
+#endif
+
 #endif
diff --git a/lib/http-file.c b/lib/http-file.c
index d707910..10c4bad 100644
--- a/lib/http-file.c
+++ b/lib/http-file.c
@@ -479,12 +479,16 @@ static int file_send_header_to_client (file_t* file, int status_code, int force_
 	content_length = file->end_offset - file->start_offset + 1;
 	if (status_code == HIO_HTTP_STATUS_OK && file->total_size != content_length) status_code = HIO_HTTP_STATUS_PARTIAL_CONTENT;
 
-	if (hio_becs_fmt(cli->sbuf, "HTTP/%d.%d %d %hs\r\nServer: %hs\r\nDate: %s\r\nConnection: %hs\r\nAccept-Ranges: bytes\r\nContent-Type: %hs\r\n",
+	if (hio_becs_fmt(cli->sbuf, "HTTP/%d.%d %d %hs\r\nServer: %hs\r\nDate: %s\r\nConnection: %hs\r\nAccept-Ranges: bytes\r\n",
 		file->req_version.major, file->req_version.minor,
 		status_code, hio_http_status_to_bcstr(status_code),
 		cli->htts->server_name, dtbuf,
-		(force_close? "close": "keep-alive"), mime_type) == (hio_oow_t)-1) return -1;
+		(force_close? "close": "keep-alive")) == (hio_oow_t)-1) return -1;
 
+	/* Content-Type is not set if mime_type is null or blank */
+	if (mime_type && mime_type[0] != '\0' &&
+	    hio_becs_fcat(cli->sbuf, "Content-Type: %hs\r\n", mime_type) == (hio_oow_t)-1) return -1;
+	
 	if (file->req_method == HIO_HTTP_GET && hio_becs_fcat(cli->sbuf, "ETag: %hs\r\n", file->peer_etag) == (hio_oow_t)-1) return -1;
 	if (status_code == HIO_HTTP_STATUS_PARTIAL_CONTENT && hio_becs_fcat(cli->sbuf, "Content-Ranges: bytes %ju-%ju/%ju\r\n", (hio_uintmax_t)file->start_offset, (hio_uintmax_t)file->end_offset, (hio_uintmax_t)file->total_size) == (hio_oow_t)-1) return -1;
 
@@ -672,9 +676,11 @@ static HIO_INLINE int process_range_header (file_t* file, hio_htre_t* req, int*
 	return 0;
 }
 
-static int open_peer_with_mode (file_t* file, const hio_bch_t* actual_file, int flags, int* error_status)
+static int open_peer_with_mode (file_t* file, const hio_bch_t* actual_file, int flags, int* error_status, const hio_bch_t** actual_mime_type)
 {
 	struct stat st;
+	const hio_bch_t* opened_file;
+	
 
 	flags |= O_NONBLOCK;
 #if defined(O_CLOEXEC)
@@ -691,7 +697,8 @@ static int open_peer_with_mode (file_t* file, const hio_bch_t* actual_file, int
 		return -1;
 	}
 
-	if (fstat(file->peer, &st) >= 0 && S_ISDIR(st.st_mode))
+	opened_file = actual_file;
+	if ((flags & O_RDONLY) && fstat(file->peer, &st) >= 0 && S_ISDIR(st.st_mode)) /* only for read operation */
 	{
 		hio_bch_t* alt_file;
 		int alt_fd;
@@ -701,14 +708,30 @@ static int open_peer_with_mode (file_t* file, const hio_bch_t* actual_file, int
 		if (alt_file)
 		{
 			alt_fd = open(alt_file, flags, 0644);
-			hio_freemem (file->htts->hio, alt_file);
 			if (alt_fd >= 0)
 			{
 				close (file->peer);
 				file->peer = alt_fd;
+				opened_file = alt_file;
 			}
 		}
 	}
+
+	if (actual_mime_type)
+	{
+		const hio_bch_t* dot;
+		dot = hio_rfind_bchar_in_bcstr(opened_file, '.');
+		if (dot)
+		{
+			const hio_bch_t* mt;
+			mt = hio_get_mime_type_by_ext(dot + 1);
+			if (mt) *actual_mime_type = mt;
+		}
+	}
+
+	if (opened_file != actual_file)
+		hio_freemem (file->htts->hio, (hio_bch_t*)opened_file);
+
 	return 0;
 }
 
@@ -854,7 +877,10 @@ int hio_svc_htts_dofile (hio_svc_htts_t* htts, hio_dev_sck_t* csck, hio_htre_t*
 	switch (file->req_method)
 	{
 		case HIO_HTTP_GET:
-			if (open_peer_with_mode(file, actual_file, O_RDONLY, &status_code) <= -1) goto done_with_status_code;
+		{
+			const hio_bch_t* actual_mime_type = mime_type;
+
+			if (open_peer_with_mode(file, actual_file, O_RDONLY, &status_code, (mime_type? HIO_NULL: &actual_mime_type)) <= -1) goto done_with_status_code;
 			if (process_range_header(file, req, &status_code) <= -1) goto done_with_status_code;
 
 			if (file->etag_match)
@@ -869,13 +895,14 @@ int hio_svc_htts_dofile (hio_svc_htts_t* htts, hio_dev_sck_t* csck, hio_htre_t*
 		#endif
 			set_tcp_cork (file->client->sck);
 
-			if (file_send_header_to_client(file, HIO_HTTP_STATUS_OK, 0, mime_type) <= -1 ||
+			if (file_send_header_to_client(file, HIO_HTTP_STATUS_OK, 0, actual_mime_type) <= -1 ||
 			    file_send_contents_to_client(file) <= -1) goto oops;
 
 			break;
+		}
 
 		case HIO_HTTP_HEAD:
-			if (open_peer_with_mode(file, actual_file, O_RDONLY, &status_code) <= -1) goto done_with_status_code;
+			if (open_peer_with_mode(file, actual_file, O_RDONLY, &status_code, HIO_NULL) <= -1) goto done_with_status_code;
 			if (process_range_header(file, req, &status_code) <= -1) goto done_with_status_code;
 			status_code = HIO_HTTP_STATUS_OK;
 			goto done_with_status_code;
@@ -888,7 +915,7 @@ int hio_svc_htts_dofile (hio_svc_htts_t* htts, hio_dev_sck_t* csck, hio_htre_t*
 				goto done_with_status_code;
 			}
 
-			if (open_peer_with_mode(file, actual_file, O_WRONLY | O_TRUNC | O_CREAT, &status_code) <= -1) goto done_with_status_code;
+			if (open_peer_with_mode(file, actual_file, O_WRONLY | O_TRUNC | O_CREAT, &status_code, HIO_NULL) <= -1) goto done_with_status_code;
 
 			/* the client input must be written to the peer side */
 			file_mark_over (file, FILE_OVER_READ_FROM_PEER);
diff --git a/lib/utl-mime.c b/lib/utl-mime.c
new file mode 100644
index 0000000..6bf1348
--- /dev/null
+++ b/lib/utl-mime.c
@@ -0,0 +1,139 @@
+/*
+    Copyright (c) 2016-2020 Chung, Hyung-Hwan. All rights reserved.
+
+    Redistribution and use in source and binary forms, with or without
+    modification, are permitted provided that the following conditions
+    are met:
+    1. Redistributions of source code must retain the above copyright
+       notice, this list of conditions and the following disclaimer.
+    2. Redistributions in binary form must reproduce the above copyright
+       notice, this list of conditions and the following disclaimer in the
+       documentation and/or other materials provided with the distribution.
+
+    THIS SOFTWARE IS PROVIDED BY THE AUTHOR "AS IS" AND ANY EXPRESS OR
+    IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+    OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+    IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+    INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+    NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+    DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+    THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+    (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+    THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <hio-utl.h>
+
+/* Keep this table sorted for binary search */
+static hio_mime_type_t mime_type_tab[] =
+{
+	{"3gp", "video/3gpp"},
+	{"3g2", "video/3gpp2"},
+	{"7z", "application/x-7z-compressed"},
+	{"aac", "audio/aac"},
+	{"abw", "application/x-abiword"},
+	{"arc", "application/x-freearc"},
+	{"avif", "image/avif"},
+	{"avi", "video/x-msvideo"},
+	{"azw", "application/vnd.amazon.ebook"},
+	{"bin", "application/octet-stream"},
+	{"bmp", "image/bmp"},
+	{"bz", "application/x-bzip"},
+	{"bz2", "application/x-bzip2"},
+	{"cda", "application/x-cdf"},
+	{"csh", "application/x-csh"},
+	{"css", "text/css"},
+	{"csv", "text/csv"},
+	{"doc", "application/msword"},
+	{"docx", "application/vnd.openxmlformats-officedocument.wordprocessingml.document"},
+	{"eot", "application/vnd.ms-fontobject"},
+	{"epub", "application/epub+zip"},
+	{"gz", "application/gzip"},
+	{"gif", "image/gif"},
+	{"htm", "text/html"},
+	{"html", "text/html"},
+	{"ico", "image/vnd.microsoft.icon"},
+	{"ics", "text/calendar"},
+	{"jar", "application/java-archive"},
+	{"jpeg", "image/jpeg"},
+	{"jpg", "image/jpeg"},
+	{"js", "text/javascript"},
+	{"json", "application/json"},
+	{"jsonld", "application/ld+json"},
+	{"mid", "audio/midi"},
+	{"midi", "audio/midi"},
+	{"mjs", "text/javascript"},
+	{"mp3", "audio/mpeg"},
+	{"mp4", "video/mp4"},
+	{"mpeg", "video/mpeg"},
+	{"mpkg", "application/vnd.apple.installer+xml"},
+	{"odp", "application/vnd.oasis.opendocument.presentation"},
+	{"ods", "application/vnd.oasis.opendocument.spreadsheet"},
+	{"odt", "application/vnd.oasis.opendocument.text"},
+	{"oga", "audio/ogg"},
+	{"ogv", "video/ogg"},
+	{"ogx", "application/ogg"},
+	{"opus", "audio/opus"},
+	{"otf", "font/otf"},
+	{"png", "image/png"},
+	{"pdf", "application/pdf"},
+	{"php", "application/x-httpd-php"},
+	{"ppt", "application/vnd.ms-powerpoint"},
+	{"pptx", "application/vnd.openxmlformats-officedocument.presentationml.presentation"},
+	{"rar", "application/vnd.rar"},
+	{"rtf", "application/rtf"},
+	{"sh", "application/x-sh"},
+	{"svg", "image/svg+xml"},
+	{"tar", "application/x-tar"},
+	{"tif", "image/tiff"},
+	{"tiff", "image/tiff"},
+	{"ts", "video/mp2t"},
+	{"ttf", "font/ttf"},
+	{"txt", "text/plain"},
+	{"vsd", "application/vnd.visio"},
+	{"wav", "audio/wav"},
+	{"weba", "audio/webm"},
+	{"webm", "video/webm"},
+	{"webp", "image/webp"},
+	{"woff", "font/woff"},
+	{"woff2", "font/woff2"},
+	{"xhtml", "application/xhtml+xml"},
+	{"xls", "application/vnd.ms-excel"},
+	{"xlsx", "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet"},
+	{"xml", "application/xml"},
+	{"xul", "application/vnd.mozilla.xul+xml"},
+	{"zip", "application/zip"}
+};
+
+const hio_bch_t* hio_get_mime_type_by_ext(const hio_bch_t* ext)
+{
+	/* perform binary search */
+
+	/* declaring left, right, mid to be of int is ok
+	 * because we know mtab is small enough. */
+	int left = 0, right = HIO_COUNTOF(mime_type_tab) - 1, mid;
+
+	while (left <= right)
+	{
+		int n;
+		hio_mime_type_t* entry;
+
+		/*mid = (left + right) / 2;*/
+		mid = left + (right - left) / 2;
+		entry = &mime_type_tab[mid];
+
+		n = hio_comp_bcstr(ext, entry->ext, 1);
+		if (n < 0) 
+		{
+			/* if left, right, mid were of hio_oow_t,
+			 * you would need the following line. 
+			if (mid == 0) break;
+			 */
+			right = mid - 1;
+		}
+		else if (n > 0) left = mid + 1;
+		else return entry->type;
+	}
+
+	return HIO_NULL;
+}