erp5_wechat_secure_payment: Optinally, let the user configure spbill_create_ip

   Whenever used via activity nodes, it is not possible to discover IP of the server via portal absolute url.

bt5/erp5_wechat_secure_payment/DocumentTemplateItem/portal_components/document.erp5.WechatService.py

@@ -118,7 +118,6 @@ class WechatService(XMLObject):
 
   def callWechatApi(self, URL, wechat_dict):
     portal = self.getPortalObject()
-    base_url = portal.absolute_url()
     wechat_url = self.getLinkUrlString()
     if self.getWechatMode() == "SANDBOX":
       key = self.getSandboxKey()
@@ -128,8 +127,13 @@ class WechatService(XMLObject):
       key = self.getServiceApiKey()
     nonce_str = self.generateRandomStr()
 
-    result = urlparse(base_url)
-    spbill_create_ip = socket.gethostbyname(result.netloc)
+    wechat_spbill_create_ip = self.getWechatSpbillCreateIp()
+    if not wechat_spbill_create_ip:
+      base_url = portal.absolute_url()
+      result = urlparse(base_url)
+      spbill_create_ip = socket.gethostbyname(result.netloc)
+    else:
+      spbill_create_ip = socket.gethostbyname(wechat_spbill_create_ip)
 
     # Construct parameter for calling the Wechat payment URL
     wechat_dict['appid'] = self.getServiceAppid()

bt5/erp5_wechat_secure_payment/PropertySheetTemplateItem/portal_property_sheets/WechatService/wechat_spbill_create_ip_property.xml

+<?xml version="1.0"?>
+<ZopeData>
+  <record id="1" aka="AAAAAAAAAAE=">
+    <pickle>
+      <global name="Standard Property" module="erp5.portal_type"/>
+    </pickle>
+    <pickle>
+      <dictionary>
+        <item>
+            <key> <string>categories</string> </key>
+            <value>
+              <tuple>
+                <string>elementary_type/string</string>
+              </tuple>
+            </value>
+        </item>
+        <item>
+            <key> <string>description</string> </key>
+            <value>
+              <none/>
+            </value>
+        </item>
+        <item>
+            <key> <string>id</string> </key>
+            <value> <string>wechat_spbill_create_ip_property</string> </value>
+        </item>
+        <item>
+            <key> <string>portal_type</string> </key>
+            <value> <string>Standard Property</string> </value>
+        </item>
+        <item>
+            <key> <string>title</string> </key>
+            <value> <string>wechat_mode</string> </value>
+        </item>
+      </dictionary>
+    </pickle>
+  </record>
+</ZopeData>

bt5/erp5_wechat_secure_payment/SkinTemplateItem/portal_skins/erp5_wechat_secure_payment/WechatService_view.xml

@@ -99,6 +99,7 @@
                         <string>my_reference</string>
                         <string>my_wechat_mode</string>
                         <string>my_service_mch_id</string>
+                        <string>my_wechat_spbill_create_ip</string>
                       </list>
                     </value>
                 </item>