====== WEB GUI Extension & Custom Configuration Parameters ======
Customized GUI extensions to display and change custom config paramters.

Please use nb_userpage_register in stead of nb_page_register in case you want to show this page also to non-admin user

<code c gui-extension.are>
/* DESC: This script will generate a page which can be viewed in the Web Manager
 * Some custom config vars are displayed and can be changed
 * All custom.* in /etc/config/factory-config.cfg are free to use
 * Copyright (C) 2014 NetModule AG, Switzerland, rfa
 */

ID = 1;
if (is_void(page = nb_page_register(ID, "FTP upload", "Hotspot"))) exit(1); 

template entry { 
   name; configvar; value; text;   
   int entry(string n, c, t) { 
      this.name = n; 
      this.configvar = c; 
      this.value = nb_config_get(c); // load inital value from config
      this.text = t; 
      return 0;
   }
};

fields = mkarray(); // fill up array 
fields[i=0] = new entry ("server", "custom.var0", "FTP server");
fields[++i] = new entry ("serverpath", "custom.var1", "Path");
fields[++i] = new entry ("user", "custom.var2", "user");
fields[++i] = new entry ("password", "custom.var3", "Password");
fields[++i] = new entry ("remove", "custom.var4", "Remove after upload (y/n)");

for (;;) {
   if (request = nb_page_request(page)) {
      post = struct_get(request, "POST"); // is empty on GET
      for (i = 0; i < length(post); i++) // get POST parameters and store in array and config 
         nb_config_set(sprintf("%s=%s", fields[i].configvar, fields[i].value = post[i].value));

      nb_page_respond(page, '<form action="sdkPage.php?id=%08X" method="post">', ID);	   
      for (i = 0; i < length(fields); i++) // show all fields with actual value
         nb_page_respond(page, '%s<br><input type="text" value="%s" name="%s" size="80" ><br>', fields[i].text, fields[i].value, fields[i].name);
      nb_page_respond(page, '<input type="submit" value="Submit"></form>'); 
      nb_page_finish(page);
   }
}

</code>

{{:sdk:gui-extension1.png|}}

{{:sdk:sdk_ftp1.png|}}


Entering data into the fields:

----
{{:sdk:sdk_ftp.png|}}
----
will store the data in the user configuration paramters for further use:
<code>
custom.var0=ftp.myserver.com
custom.var1=myfile.txt
custom.var2=admin
custom.var3=adminpassword
custom.var4=n
</code>

In general following configuration parameters are free to use for customer applications (see router /etc/config/factory-config.cfg):
<code>

# custom 
custom.status                                   =
custom.var0                                     =
custom.var1                                     =
custom.var2                                     =
custom.var3                                     =
custom.var4                                     =

# custom table0
custom.table0.0.var0                            =
custom.table0.0.var1                            =
custom.table0.0.var2                            =
custom.table0.0.var3                            =
custom.table0.0.var4                            =
custom.table0.1.var0                            =
custom.table0.1.var1                            =
custom.table0.1.var2                            =
custom.table0.1.var3                            =
custom.table0.1.var4                            =

# custom table1
custom.table1.0.var0                            =
custom.table1.0.var1                            =
custom.table1.0.var2                            =
custom.table1.0.var3                            =
custom.table1.0.var4                            =
custom.table1.1.var0                            =
custom.table1.1.var1                            =
custom.table1.1.var2                            =
custom.table1.1.var3                            =
custom.table1.1.var4                            =

# custom table2
custom.table2.0.var0                            =
custom.table2.0.var1                            =
custom.table2.0.var2                            =
custom.table2.0.var3                            =
custom.table2.0.var4                            =
custom.table2.1.var0                            =
custom.table2.1.var1                            =
custom.table2.1.var2                            =
custom.table2.1.var3                            =
custom.table2.1.var4                            =
custom.table2.2.var0                            =
custom.table2.2.var1                            =
custom.table2.2.var2                            =
custom.table2.2.var3                            =
custom.table2.2.var4                            =
custom.table2.3.var0                            =
custom.table2.3.var1                            =
custom.table2.3.var2                            =
custom.table2.3.var3                            =
custom.table2.3.var4                            =
custom.table2.4.var0                            =
custom.table2.4.var1                            =
custom.table2.4.var2                            =
custom.table2.4.var3                            =
custom.table2.4.var4                            =
custom.table2.5.var0                            =
custom.table2.5.var1                            =
custom.table2.5.var2                            =
custom.table2.5.var3                            =
custom.table2.5.var4                            =
custom.table2.6.var0                            =
custom.table2.6.var1                            =
custom.table2.6.var2                            =
custom.table2.6.var3                            =
custom.table2.6.var4                            =
custom.table2.7.var0                            =
custom.table2.7.var1                            =
custom.table2.7.var2                            =
custom.table2.7.var3                            =
custom.table2.7.var4                            =
</code>