diff --git a/qse/cmd/http/httpd.c b/qse/cmd/http/httpd.c
index ee5e3421..bf9385d7 100644
--- a/qse/cmd/http/httpd.c
+++ b/qse/cmd/http/httpd.c
@@ -427,11 +427,6 @@ static int query_server (
 		ssl->keyfile = server_xtn->scfg[SCFG_SSLKEYFILE];
 		return 0;
 	}
-	else if (code == QSE_HTTPD_SERVERSTD_EXPECT100)
-	{
-		*(int*)result = 100;
-		return 0;
-	}
 
 	if (req)
 	{
diff --git a/qse/include/qse/http/htre.h b/qse/include/qse/http/htre.h
index 39448a3f..77635dce 100644
--- a/qse/include/qse/http/htre.h
+++ b/qse/include/qse/http/htre.h
@@ -98,7 +98,8 @@ struct qse_htre_t
 #define QSE_HTRE_ATTR_CHUNKED   (1 << 0)
 #define QSE_HTRE_ATTR_LENGTH    (1 << 1)
 #define QSE_HTRE_ATTR_KEEPALIVE (1 << 2)
-#define QSE_HTRE_ATTR_EXPECT100 (1 << 3)
+#define QSE_HTRE_ATTR_EXPECT    (1 << 3)
+#define QSE_HTRE_ATTR_EXPECT100 (1 << 4)
 		int flags;
 		qse_size_t content_length;
 		const qse_mchar_t* status; /* for cgi */
diff --git a/qse/include/qse/http/stdhttpd.h b/qse/include/qse/http/stdhttpd.h
index 7e2de323..1ec357b8 100644
--- a/qse/include/qse/http/stdhttpd.h
+++ b/qse/include/qse/http/stdhttpd.h
@@ -99,7 +99,6 @@ struct qse_httpd_serverstd_ssl_t
 enum qse_httpd_serverstd_query_code_t
 {
 	QSE_HTTPD_SERVERSTD_SSL,            /* qse_httpd_serverstd_ssl_t */
-	QSE_HTTPD_SERVERSTD_EXPECT100,      /* int (http error code) */
 
 	QSE_HTTPD_SERVERSTD_NAME,           /* const qse_mchar_t* */
 	QSE_HTTPD_SERVERSTD_ROOT,           /* qse_httpd_serverstd_root_t */
diff --git a/qse/lib/cmn/str-cmp.c b/qse/lib/cmn/str-cmp.c
index 2c473f92..668857eb 100644
--- a/qse/lib/cmn/str-cmp.c
+++ b/qse/lib/cmn/str-cmp.c
@@ -70,7 +70,7 @@ int qse_mbscasecmp (const qse_mchar_t* s1, const qse_mchar_t* s2)
 	while (QSE_TOMUPPER(*s1) == QSE_TOMUPPER(*s2)) 
 	{
 		if (*s1 == QSE_C('\0')) return 0;
-		s1++, s2++;
+		s1++; s2++;
 	}
 
 	return (QSE_TOMUPPER(*s1) > QSE_TOMUPPER(*s2))? 1: -1;
diff --git a/qse/lib/http/htrd.c b/qse/lib/http/htrd.c
index 3ffc8c67..7b1e801f 100644
--- a/qse/lib/http/htrd.c
+++ b/qse/lib/http/htrd.c
@@ -574,11 +574,17 @@ static int capture_expect (qse_htrd_t* htrd, qse_htb_pair_t* pair)
 {
 	qse_htre_hdrval_t* val;
 
-	val = QSE_HTB_VPTR(pair);
-	while (val->next) val = val->next;
+	/* Expect is included */
+	htrd->re.attr.flags |= QSE_HTRE_ATTR_EXPECT; 
 
-	if (qse_mbscmp (val->ptr, QSE_MT("100-continue")) == 0)
-		htrd->re.attr.flags |= QSE_HTRE_ATTR_EXPECT100;
+	val = QSE_HTB_VPTR(pair);
+	while (val) 
+	{	
+		/* Expect: 100-continue is included */
+		if (qse_mbscasecmp (val->ptr, QSE_MT("100-continue")) == 0)
+			htrd->re.attr.flags |= QSE_HTRE_ATTR_EXPECT100; 
+		val = val->next;
+	}
 
 	return 0;
 }
diff --git a/qse/lib/http/httpd-proxy.c b/qse/lib/http/httpd-proxy.c
index 4a67d4d9..9e98210f 100644
--- a/qse/lib/http/httpd-proxy.c
+++ b/qse/lib/http/httpd-proxy.c
@@ -495,9 +495,9 @@ qse_printf (QSE_T("NORMAL REPLY 222222222222222222222 NORMAL REPLY\n"));
 		}
 		/* end initial line */
 
-		if (!(proxy->httpd->opt.trait & QSE_HTTPD_PROXYNOVIA))
+		if (!(proxy->httpd->opt.trait & QSE_HTTPD_PROXYNOVIA) && qse_htre_getscodeval(res) != 100)
 		{
-			/* add the Via: header into the response */
+			/* add the Via: header into the response if it is not 100. */
 			if (qse_mbs_cat (proxy->res, QSE_MT("Via: ")) == (qse_size_t)-1 ||
 			    qse_mbs_cat (proxy->res, qse_httpd_getname (proxy->httpd)) == (qse_size_t)-1 ||
 			    qse_mbs_cat (proxy->res, QSE_MT("\r\n")) == (qse_size_t)-1) 
diff --git a/qse/lib/http/httpd-std.c b/qse/lib/http/httpd-std.c
index 153531c7..070b241f 100644
--- a/qse/lib/http/httpd-std.c
+++ b/qse/lib/http/httpd-std.c
@@ -1866,43 +1866,39 @@ if (qse_htre_getcontentlen(req) > 0)
 
 	if (peek)
 	{
-		/*if (method != QSE_HTTP_POST && method != QSE_HTTP_PUT && method != QSE_HTTP_OPTIONS)*/
+#if 0
 		if (method == QSE_HTTP_HEAD || method == QSE_HTTP_GET)
 		{
 			/* i'll discard request contents if the method is HEAD or GET */
 			qse_httpd_discardcontent (httpd, req);
 		}
-
-		if ((req->attr.flags & QSE_HTRE_ATTR_EXPECT100) &&
+#endif
+		if ((req->attr.flags & QSE_HTRE_ATTR_EXPECT) &&
 		    (req->version.major > 1 ||
 		     (req->version.major == 1 && req->version.minor >= 1)) &&
 		    !content_received)
 		{
 			int code;
 
-			/* "Expect: 100-Continue" in the header, version 1.1 or higher,
-			 * and no content received yet */
+			/* "Expect" in the header, version 1.1 or higher,
+			 * and no content received yet.
+			 * if the partial or complete content is already received,
+			 * we don't need to send '100 continue'. */
 
-			if (server_xtn->query (httpd, client->server, req, QSE_NULL, QSE_HTTPD_SERVERSTD_EXPECT100, &code) <= -1) return -1;
-
-			/* TODO: determine if to return 100-continue or other errors */
-			if (code == 100)
+			if (req->attr.flags & QSE_HTRE_ATTR_EXPECT100)
 			{
+				/* "Expect: 100-continue" in the header */
 				if (qse_httpd_entaskcontinue (httpd, client, QSE_NULL, req) == QSE_NULL) return -1;
 			}
-			else if (code == 417) 
+			else
 			{
 				/* if expectation fails, the client must not send the contents.
 				 * however, some erroneous clients may do that. 
 				 * calling qse_httpd_discardcontent() won't do any harms */
-
-				/*
-				if (qse_httpd_entaskexpectfailure (httpd, client, QSE_NULL, req) == QSE_NULL) return -1;
-				*/
 				qse_httpd_discardcontent (httpd, req);
+				task = qse_httpd_entaskerr (httpd, client, QSE_NULL, 417, req);
+				if (task == QSE_NULL) goto oops;
 			}
-
-			/* if 200, ignore "Expect: 100-Continue" */
 		}
 	}
 
@@ -2706,10 +2702,6 @@ static int query_server (
 			qse_httpd_seterrnum (httpd, QSE_HTTPD_ENOENT);
 			return -1;
 
-		case QSE_HTTPD_SERVERSTD_EXPECT100:
-			*(int*)result = 100;
-			break;
-
 		case QSE_HTTPD_SERVERSTD_NAME:
 			*(const qse_mchar_t**)result = QSE_NULL;
 			break;