diff --git a/acme.sh b/acme.sh
index 748363e8..241d4964 100755
--- a/acme.sh
+++ b/acme.sh
@@ -1950,7 +1950,7 @@ _get() {
     fi
     _debug "_CURL" "$_CURL"
     if [ "$onlyheader" ]; then
-      $_CURL -I --user-agent "$USER_AGENT" -H "$_H1" -H "$_H2" -H "$_H3" -H "$_H4" -H "$_H5" "$url"
+      $_CURL -X GET -I --user-agent "$USER_AGENT" -H "$_H1" -H "$_H2" -H "$_H3" -H "$_H4" -H "$_H5" "$url"
     else
       $_CURL --user-agent "$USER_AGENT" -H "$_H1" -H "$_H2" -H "$_H3" -H "$_H4" -H "$_H5" "$url"
     fi
diff --git a/dnsapi/dns_ali.sh b/dnsapi/dns_ali.sh
index c2105672..c4d55cec 100755
--- a/dnsapi/dns_ali.sh
+++ b/dnsapi/dns_ali.sh
@@ -1,27 +1,34 @@
-#!/usr/bin/env sh
+#!/usr/local/bin/bash
 
 Ali_API="https://alidns.aliyuncs.com/"
 
-#Ali_Key="LTqIA87hOKdjevsf5"
-#Ali_Secret="0p5EYueFNq501xnCPzKNbx6K51qPH2"
+#ALICLOUD_ACCESS_KEY="LTqIA87hOKdjevsf5"
+#ALICLOUD_SECRET_KEY="0p5EYueFNq501xnCPzKNbx6K51qPH2"
 
-#Usage: dns_ali_add   _acme-challenge.www.domain.com   "XKrxpRBosdIKFzxW_CT3KLZNf6q0HG9i01zxXp5CPBs"
+#Usage: dns_ali_add   $(_ali_urlencode "_acme-challenge.www.domain.com") "XKrxpRBosdIKFzxW_CT3KLZNf6q0HG9i01zxXp5CPBs"
 dns_ali_add() {
   fulldomain=$1
   txtvalue=$2
 
-  Ali_Key="${Ali_Key:-$(_readaccountconf_mutable Ali_Key)}"
-  Ali_Secret="${Ali_Secret:-$(_readaccountconf_mutable Ali_Secret)}"
-  if [ -z "$Ali_Key" ] || [ -z "$Ali_Secret" ]; then
-    Ali_Key=""
-    Ali_Secret=""
+  ALICLOUD_ACCESS_KEY="${ALICLOUD_ACCESS_KEY:-$(_readaccountconf_mutable ALICLOUD_ACCESS_KEY)}"
+  ALICLOUD_SECRET_KEY="${ALICLOUD_SECRET_KEY:-$(_readaccountconf_mutable ALICLOUD_SECRET_KEY)}"
+
+  if [ -z "$ALICLOUD_ACCESS_KEY" ] || [ -z "$ALICLOUD_SECRET_KEY" ]; then
+    _use_instance_role
+  fi
+
+  if [ -z "$ALICLOUD_ACCESS_KEY" ] || [ -z "$ALICLOUD_SECRET_KEY" ]; then
+    ALICLOUD_ACCESS_KEY=""
+    ALICLOUD_SECRET_KEY=""
     _err "You don't specify aliyun api key and secret yet."
     return 1
   fi
 
   #save the api key and secret to the account conf file.
-  _saveaccountconf_mutable Ali_Key "$Ali_Key"
-  _saveaccountconf_mutable Ali_Secret "$Ali_Secret"
+  if [ -z "$_using_role" ]; then
+    _saveaccountconf_mutable ALICLOUD_ACCESS_KEY "$ALICLOUD_ACCESS_KEY"
+    _saveaccountconf_mutable ALICLOUD_SECRET_KEY "$ALICLOUD_SECRET_KEY"
+  fi
 
   _debug "First detect the root zone"
   if ! _get_root "$fulldomain"; then
@@ -35,8 +42,8 @@ dns_ali_add() {
 dns_ali_rm() {
   fulldomain=$1
   txtvalue=$2
-  Ali_Key="${Ali_Key:-$(_readaccountconf_mutable Ali_Key)}"
-  Ali_Secret="${Ali_Secret:-$(_readaccountconf_mutable Ali_Secret)}"
+  ALICLOUD_ACCESS_KEY="${ALICLOUD_ACCESS_KEY:-$(_readaccountconf_mutable ALICLOUD_ACCESS_KEY)}"
+  ALICLOUD_SECRET_KEY="${ALICLOUD_SECRET_KEY:-$(_readaccountconf_mutable ALICLOUD_SECRET_KEY)}"
 
   _debug "First detect the root zone"
   if ! _get_root "$fulldomain"; then
@@ -77,8 +84,45 @@ _get_root() {
   return 1
 }
 
+_use_instance_role() {
+  _url="http://100.100.100.200/latest/meta-data/ram/security-credentials/"
+  _debug "_url" "$_url"
+  if ! _get "$_url" true 1 | _head_n 1 | grep -Fq 200; then
+    _debug "Unable to fetch IAM role from instance metadata"
+    return 1
+  fi
+  _ali_instance_role=$(_get "$_url" "" 1)
+  _debug "_ali_instance_role" "_ali_instance_role"
+
+  _ali_creds="$(
+    _get "$_url$_ali_instance_role" "" 1 |
+      _normalizeJson |
+      tr '{,}' '\n' |
+      while read -r _line; do
+        _key="$(echo "${_line%%:*}" | tr -d '"')"
+        _value="${_line#*:}"
+        _debug3 "_key" "$_key"
+        _secure_debug3 "_value" "$_value"
+        case "$_key" in
+        AccessKeyId) echo "ALICLOUD_ACCESS_KEY=$_value" ;;
+        AccessKeySecret) echo "ALICLOUD_SECRET_KEY=$_value" ;;
+        SecurityToken) echo "ALICLOUD_SECURITY_TOKEN=$_value" ;;
+        esac
+      done |
+      paste -sd' ' -
+  )"
+  _secure_debug "_ali_creds" "$_ali_creds"
+
+  if [ -z "$_ali_creds" ]; then
+    return 1
+  fi
+
+  eval "$_ali_creds"
+  _using_role=true
+}
+
 _ali_rest() {
-  signature=$(printf "%s" "GET&%2F&$(_ali_urlencode "$query")" | _hmac "sha1" "$(printf "%s" "$Ali_Secret&" | _hex_dump | tr -d " ")" | _base64)
+  signature=$(printf "%s" "GET&%2F&$(_ali_urlencode "$query")" | _hmac "sha1" "$(printf "%s" "$ALICLOUD_SECRET_KEY&" | _hex_dump | tr -d " ")" | _base64)
   signature=$(_ali_urlencode "$signature")
   url="$Ali_API?$query&Signature=$signature"
 
@@ -124,11 +168,14 @@ _check_exist_query() {
   _qdomain="$1"
   _qsubdomain="$2"
   query=''
-  query=$query'AccessKeyId='$Ali_Key
+  query=$query'AccessKeyId='$ALICLOUD_ACCESS_KEY
   query=$query'&Action=DescribeDomainRecords'
   query=$query'&DomainName='$_qdomain
   query=$query'&Format=json'
   query=$query'&RRKeyWord='$_qsubdomain
+  if [ -n "$ALICLOUD_SECURITY_TOKEN" ]; then
+    query=$query'&SecurityToken='$(_ali_urlencode "$ALICLOUD_SECURITY_TOKEN")
+  fi
   query=$query'&SignatureMethod=HMAC-SHA1'
   query=$query"&SignatureNonce=$(_ali_nonce)"
   query=$query'&SignatureVersion=1.0'
@@ -139,11 +186,14 @@ _check_exist_query() {
 
 _add_record_query() {
   query=''
-  query=$query'AccessKeyId='$Ali_Key
+  query=$query'AccessKeyId='$ALICLOUD_ACCESS_KEY
   query=$query'&Action=AddDomainRecord'
   query=$query'&DomainName='$1
   query=$query'&Format=json'
   query=$query'&RR='$2
+  if [ -n "$ALICLOUD_SECURITY_TOKEN" ]; then
+    query=$query'&SecurityToken='$(_ali_urlencode "$ALICLOUD_SECURITY_TOKEN")
+  fi
   query=$query'&SignatureMethod=HMAC-SHA1'
   query=$query"&SignatureNonce=$(_ali_nonce)"
   query=$query'&SignatureVersion=1.0'
@@ -155,10 +205,13 @@ _add_record_query() {
 
 _delete_record_query() {
   query=''
-  query=$query'AccessKeyId='$Ali_Key
+  query=$query'AccessKeyId='$ALICLOUD_ACCESS_KEY
   query=$query'&Action=DeleteDomainRecord'
   query=$query'&Format=json'
   query=$query'&RecordId='$1
+  if [ -n "$ALICLOUD_SECURITY_TOKEN" ]; then
+    query=$query'&SecurityToken='$(_ali_urlencode "$ALICLOUD_SECURITY_TOKEN")
+  fi
   query=$query'&SignatureMethod=HMAC-SHA1'
   query=$query"&SignatureNonce=$(_ali_nonce)"
   query=$query'&SignatureVersion=1.0'
@@ -168,10 +221,13 @@ _delete_record_query() {
 
 _describe_records_query() {
   query=''
-  query=$query'AccessKeyId='$Ali_Key
+  query=$query'AccessKeyId='$ALICLOUD_ACCESS_KEY
   query=$query'&Action=DescribeDomainRecords'
   query=$query'&DomainName='$1
   query=$query'&Format=json'
+  if [ -n "$ALICLOUD_SECURITY_TOKEN" ]; then
+    query=$query'&SecurityToken='$(_ali_urlencode "$ALICLOUD_SECURITY_TOKEN")
+  fi
   query=$query'&SignatureMethod=HMAC-SHA1'
   query=$query"&SignatureNonce=$(_ali_nonce)"
   query=$query'&SignatureVersion=1.0'