CXM_web_session.anubis 25.8 KB
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๏ปฟ/*
 * Created by PyramIDE.
 * User: ใƒ•ใƒฉใƒณใ‚นใฎใƒˆใƒˆใƒญ aka (David RENร‰) 
 * Date: 17/02/2017
 * Time: 17:18
 * ยฉ Calexium 
 */

read system/convert.anubis
read system/muscle.anubis
read CXM_common.anubis
read CXM_web_dump.anubis


public type WEB_Session_Field_Datum:
  string(String),             //fully implented
  bool(Bool),                 //fully implented
  int(Int),                   //fully implented
  message(Message),           //fully implented
  byte_array(ByteArray),
  float(Float),
  word128(Word128),
  word64(Word64),
  word32(Word32),
  word16(Word16),
  word8(Word8),
  word4(Word4)
.

public type WEB_Session_Field_Type:
  string_t,
  bool_t,
  int_t,
  message_t,
  byte_array_t,
  float_t,
  word128_t,
  word64_t,
  word32_t,
  word16_t,
  word8_t,
  word4_t
.

public type WEB_Session_Field:
  session_field(
    String                        field_name,
    WEB_Session_Field_Type        field_type,
    Var(WEB_Session_Field_Datum)  field_datum   //Var because it can be replaced
  ).

public type WEB_Session_Field_No_Var:
  session_field(
    String                   field_name,
    WEB_Session_Field_Type   field_type,
    WEB_Session_Field_Datum  field_datum   //Var because it can be replaced
  ).

public type WEB_Request:
  web_request(
    HTTP_Info        http_info,
    List(Web_arg)    lwa,
    Bool             is_https,
  )
.
    
public type WEB_Session:
  web_session(
    String                  language,
    Var(List(WEB_Session_Field)) fields,
    WEB_Request             web_request,
    WEB_Request             previous_web_request
  ).

public type WEB_Session_No_Var:
  web_session(
    String                          language,
    List(WEB_Session_Field_No_Var)  fields,
    WEB_Request                     web_request,
    WEB_Request                     previous_web_request
  ).
  
public define Var(List(WEB_Session_Field))
  empty_fields_list =
  var([]).
  
public define WEB_Session_Field
  session_field
  (
    String  _field_name,
    String  _string
  )=
  session_field(_field_name, string_t, var(string(_string)))
.

   *----------------------------------------------------------------*

define Var(List(WEB_Session_Field))
  to_WEB_Session_Field
  (
    List(WEB_Session_Field_No_Var)  fields
  )=
  var(map((WEB_Session_Field_No_Var field) |->  session_field(field.field_name, field.field_type, var(field.field_datum)), fields))
.

define List(WEB_Session_Field_No_Var)
  to_WEB_Session_Field_No_Var
  (
    List(WEB_Session_Field)  fields
  )=
  map((WEB_Session_Field field) |->  session_field(field.field_name, field.field_type, *field.field_datum), fields)
.
  
public define WEB_Session
  to_WEB_Session
  (
    WEB_Session_No_Var _session
  )=
  since _session is web_session(language, fields, web_request, previous_web_request),
  web_session(language, to_WEB_Session_Field(fields), web_request, previous_web_request)
.

public define WEB_Session_No_Var
  to_WEB_Session_No_Var
  (
    WEB_Session _session
  )=
  since _session is web_session(language, fields, web_request, previous_web_request),
  web_session(language, to_WEB_Session_Field_No_Var(*fields), web_request, previous_web_request)  
.

public define Maybe(WEB_Session_Field_Datum)
  get_field
  (
    List(WEB_Session_Field) fields,
    WEB_Session_Field_Type  _field_type,
    String                  _field_name
  ) =
  if fields is
  {
    []      then failure,
    [h . t] then 
      if h.field_name = _field_name & h.field_type = _field_type then
        success(*h.field_datum)
      else
        get_field(t, _field_type, _field_name)
   }
.
  /******** ANY functions ***************/


define List(WEB_Session_Field)
  _remove_any
  (
    List(WEB_Session_Field)       fields,
    WEB_Session_Field_Type        _field_type,    
    String                        _field_name
  )=
  if fields is
  {
    []      then [],
    [h . t] then
      if h.field_name = _field_name & h.field_type = _field_type then
        _remove_any(t, _field_type, _field_name)
      else
        [ h. _remove_any(t, _field_type, _field_name) ]
  }
.

define One
  remove_any
  (
    Var(List(WEB_Session_Field))  fields,
    WEB_Session_Field_Type        _field_type,    
    String                        _field_name
  )=
  fields <- _remove_any(*fields, _field_type, _field_name)
.

define One
  replace_any
  (
    List(WEB_Session_Field) fields,
    WEB_Session_Field_Type  _field_type,    
    String                  _field_name,
    WEB_Session_Field_Datum _field_value,
    Var(List(WEB_Session_Field)) fields_org,    
  )=
  if fields is
  {
    []      then fields_org <- [session_field(_field_name, _field_type, var(_field_value)) . *fields_org],
    [h . t] then
      println("h.field_name = "+h.field_name+" _field_name = "+_field_name);
      if h.field_name = _field_name & h.field_type = _field_type then
        println("replace field_name found");
        h.field_datum <- _field_value
      else
        replace_any(t, _field_type, _field_name, _field_value, fields_org)
  }
.


define One
  replace_any
  (
    Var(List(WEB_Session_Field)) fields,
    WEB_Session_Field_Type  _field_type,    
    String                  _field_name,
    WEB_Session_Field_Datum _field_value
  )=
  replace_any(*fields, _field_type, _field_name, _field_value, fields)
.

  /*************** String *****************/
  
  Maybe(String) get_String(fields, _field_name)
  String        get_String(fiels, _field_name, default_value)
  
public define Maybe(String)
  get_String
  (
    Var(List(WEB_Session_Field))  fields,
    String                        _field_name
  ) =
  if get_field(*fields, string_t, _field_name) is
  {
    failure         then failure,
    success(datum)  then 
      if datum is string(value) then
        success(value)
      else
        failure
  }
.

public define String
  get_String
  (
    Var(List(WEB_Session_Field)) fields,
    String                  _field_name,
    String                  default_value
  ) =
  if get_String(fields, _field_name) is
  {
    failure         then default_value
    success(value)  then value
  }.

public define One
  put_String
  (
    Var(List(WEB_Session_Field)) fields,
    String                  _field_name,
    String                  _field_value
  )=
  fields <- [session_field(_field_name, string_t, var(string(_field_value))) . *fields]
.

public define One
  replace_String
  (
    Var(List(WEB_Session_Field))  fields,
    String                        _field_name,
    String                        _field_value
  )=
  replace_any(fields, string_t, _field_name, string(_field_value))
.


public define One
  remove_String
  (
    Var(List(WEB_Session_Field))  fields,
    String                        _field_name
  )=
  remove_any(fields, string_t, _field_name)
.

  /*************** Bool *****************/
  
  Maybe(Bool) get_Bool(fields, _field_name)
  Bool        get_Bool(fiels, _field_name, default_value)
  
public define Maybe(Bool)
  get_Bool
  (
    Var(List(WEB_Session_Field))  fields,
    String                        _field_name
  ) =
  if get_field(*fields, bool_t, _field_name) is
  {
    failure         then failure,
    success(datum)  then 
      if datum is bool(value) then
        success(value)
      else
        failure
  }
.

public define Bool
  get_Bool
  (
    Var(List(WEB_Session_Field))  fields,
    String                        _field_name,
    Bool                          default_value
  ) =
  if get_Bool(fields, _field_name) is
  {
    failure         then default_value
    success(value)  then value
  }.

public define One
  put_Bool
  (
    Var(List(WEB_Session_Field))  fields,
    String                        _field_name,
    Bool                          _field_value
  )=
  fields <- [session_field(_field_name, bool_t, var(bool(_field_value))) . *fields]
.

public define One
  replace_Bool
  (
    Var(List(WEB_Session_Field))  fields,
    String                        _field_name,
    Bool                          _field_value
  )=
  replace_any(fields, bool_t, _field_name, bool(_field_value))
.


public define One
  remove_Bool
  (
    Var(List(WEB_Session_Field))  fields,
    String                        _field_name
  )=
  remove_any(fields, bool_t, _field_name)
.

  /*************** Int *****************/
  
  Maybe(String) get_Int(fields, _field_name)
  String        get_Int(fiels, _field_name, default_value)
  
public define Maybe(Int)
  get_Int
  (
    Var(List(WEB_Session_Field))  fields,
    String                        _field_name,
  ) =
  if get_field(*fields, int_t, _field_name) is
  {
    failure         then failure,
    success(datum)  then 
      if datum is int(value) then
        success(value)
      else
        failure
  }
.

public define Int
  get_Int
  (
    Var(List(WEB_Session_Field))  fields,
    String                        _field_name,
    Int                           default_value
  ) =
  if get_Int(fields, _field_name) is
  {
    failure         then default_value
    success(value)  then value
  }.

public define One
  put_Int
  (
    Var(List(WEB_Session_Field)) fields,
    String                  _field_name,
    Int                     _field_value
  )=
  fields <- [session_field(_field_name, int_t, var(int(_field_value))) . *fields]
.

public define One
  replace_Int
  (
    Var(List(WEB_Session_Field))  fields,
    String                        _field_name,
    Int                           _field_value
  )=
  replace_any(fields, int_t, _field_name, int(_field_value))
.


public define One
  remove_Int
  (
    Var(List(WEB_Session_Field))  fields,
    String                        _field_name
  )=
  remove_any(fields, int_t, _field_name)
.

  /*************** Message *****************/
  
  Maybe(String) get_Message(fields, _field_name)
  String        get_Message(fiels, _field_name, default_value)
  
public define Maybe(Message)
  get_Message
  (
    Var(List(WEB_Session_Field))  fields,
    String                        _field_name
  ) =
  if get_field(*fields, message_t, _field_name) is
  {
    failure         then failure,
    success(datum)  then 
      if datum is message(value) then
        success(value)
      else
        failure
  }
.

public define Message
  get_Message
  (
    Var(List(WEB_Session_Field))  fields,
    String                        _field_name,
    Message                       default_value
  ) =
  if get_Message(fields, _field_name) is
  {
    failure         then default_value
    success(value)  then value
  }.

public define One
  put_Message
  (
    Var(List(WEB_Session_Field))  fields,
    String                        _field_name,
    Message                       _field_value
  )=
  fields <- [session_field(_field_name, message_t, var(message(_field_value))) . *fields]
.

public define One
  replace_Message
  (
    Var(List(WEB_Session_Field))  fields,
    String                        _field_name,
    Message                       _field_value
  )=
  replace_any(fields, message_t, _field_name, message(_field_value))
.

public define One
  remove_Message
  (
    Var(List(WEB_Session_Field))  fields,
    String                        _field_name
  )=
  remove_any(fields, message_t, _field_name)
.

  /*************** ByteArray *****************/
  
  Maybe(ByteArray) get_ByteArray(fields, _field_name)
  ByteArray        get_ByteArray(fiels, _field_name, default_value)
  
public define Maybe(ByteArray)
  get_ByteArray
  (
    Var(List(WEB_Session_Field))  fields,
    String                        _field_name,
  ) =
  if get_field(*fields, byte_array_t, _field_name) is
  {
    failure         then failure,
    success(datum)  then 
      if datum is byte_array(value) then
        success(value)
      else
        failure
  }
.

public define ByteArray
  get_ByteArray
  (
    Var(List(WEB_Session_Field))  fields,
    String                        _field_name,
    ByteArray                     default_value
  ) =
  if get_ByteArray(fields, _field_name) is
  {
    failure         then default_value
    success(value)  then value
  }.

public define One
  put_ByteArray
  (
    Var(List(WEB_Session_Field))  fields,
    String                        _field_name,
    ByteArray                     _field_value
  )=
  fields <- [session_field(_field_name, byte_array_t, var(byte_array(_field_value))) . *fields]
.

public define One
  replace_ByteArray
  (
    Var(List(WEB_Session_Field))  fields,
    String                        _field_name,
    ByteArray                     _field_value
  )=
  replace_any(fields, byte_array_t, _field_name, byte_array(_field_value))
.

public define One
  remove_ByteArray
  (
    Var(List(WEB_Session_Field))  fields,
    String                        _field_name
  )=
  remove_any(fields, byte_array_t, _field_name)
.

  /*************** Float *****************/
  
  Maybe(Float) get_Float(fields, _field_name)
  Float        get_Float(fiels, _field_name, default_value)
  
public define Maybe(Float)
  get_Float
  (
    Var(List(WEB_Session_Field))  fields,
    String                        _field_name,
  ) =
  if get_field(*fields, float_t, _field_name) is
  {
    failure         then failure,
    success(datum)  then 
      if datum is float(value) then
        success(value)
      else
        failure
  }
.

public define Float
  get_Float
  (
    Var(List(WEB_Session_Field))  fields,
    String                        _field_name,
    Float                         default_value
  ) =
  if get_Float(fields, _field_name) is
  {
    failure         then default_value
    success(value)  then value
  }.

public define One
  put_Float
  (
    Var(List(WEB_Session_Field))  fields,
    String                        _field_name,
    Float                         _field_value
  )=
  fields <- [session_field(_field_name, float_t, var(float(_field_value))) . *fields]
.

public define One
  replace_Float
  (
    Var(List(WEB_Session_Field))  fields,
    String                        _field_name,
    Float                         _field_value
  )=
  replace_any(fields, float_t, _field_name, float(_field_value))
.

public define One
  remove_Float
  (
    Var(List(WEB_Session_Field))  fields,
    String                        _field_name
  )=
  remove_any(fields, float_t, _field_name)
.

  /*************** Word128 *****************/
  
  Maybe(Word128) get_Word128t(fields, _field_name)
  Word128        get_Word128(fields, _field_name, default_value)
  
public define Maybe(Word128)
  get_Word128
  (
    Var(List(WEB_Session_Field))  fields,
    String                        _field_name,
  ) =
  if get_field(*fields, word128_t, _field_name) is
  {
    failure         then failure,
    success(datum)  then 
      if datum is word128(value) then
        success(value)
      else
        failure
  }
.

public define Word128
  get_Word128
  (
    Var(List(WEB_Session_Field))  fields,
    String                        _field_name,
    Word128                       default_value
  ) =
  if get_Word128(fields, _field_name) is
  {
    failure         then default_value
    success(value)  then value
  }.

public define One
  put_Word128
  (
    Var(List(WEB_Session_Field))  fields,
    String                        _field_name,
    Word128                       _field_value
  )=
  fields <- [session_field(_field_name, word128_t, var(word128(_field_value))) . *fields]
.

public define One
  replace_Word128
  (
    Var(List(WEB_Session_Field))  fields,
    String                        _field_name,
    Word128                       _field_value
  )=
  replace_any(fields, word128_t, _field_name, word128(_field_value))
.

public define One
  remove_Word128
  (
    Var(List(WEB_Session_Field))  fields,
    String                        _field_name
  )=
  remove_any(fields, word128_t, _field_name)
.

  /*************** Word64 *****************/
  
  Maybe(Word64) get_Word64(fields, _field_name)
  Word64        get_Word64(fields, _field_name, default_value)
  
public define Maybe(Word64)
  get_Word64
  (
    Var(List(WEB_Session_Field))  fields,
    String                        _field_name,
  ) =
  if get_field(*fields, word64_t, _field_name) is
  {
    failure         then failure,
    success(datum)  then 
      if datum is word64(value) then
        success(value)
      else
        failure
  }
.

public define Word64
  get_Word64
  (
    Var(List(WEB_Session_Field))  fields,
    String                        _field_name,
    Word64                        default_value
  ) =
  if get_Word64(fields, _field_name) is
  {
    failure         then default_value
    success(value)  then value
  }.

public define One
  put_Word64
  (
    Var(List(WEB_Session_Field))  fields,
    String                  _field_name,
    Word64                  _field_value
  )=
  fields <- [session_field(_field_name, word64_t, var(word64(_field_value))) . *fields]
.

public define One
  replace_Word64
  (
    Var(List(WEB_Session_Field))  fields,
    String                  _field_name,
    Word64                  _field_value
  )=
  replace_any(fields, word64_t, _field_name, word64(_field_value))
.

public define One
  remove_Word64
  (
    Var(List(WEB_Session_Field))  fields,
    String                        _field_name
  )=
  remove_any(fields, word64_t, _field_name)
.

  /*************** Word32 *****************/
  
  Maybe(Word32) get_Word32(fields, _field_name)
  Word32        get_Word32(fields, _field_name, default_value)
  
public define Maybe(Word32)
  get_Word32
  (
    Var(List(WEB_Session_Field))  fields,
    String                        _field_name,
  ) =
  if get_field(*fields, word32_t, _field_name) is
  {
    failure         then failure,
    success(datum)  then 
      if datum is word32(value) then
        success(value)
      else
        failure
  }
.

public define Word32
  get_Word32
  (
    Var(List(WEB_Session_Field))  fields,
    String                        _field_name,
    Word32                        default_value
  ) =
  if get_Word32(fields, _field_name) is
  {
    failure         then default_value
    success(value)  then value
  }.

public define One
  put_Word32
  (
    Var(List(WEB_Session_Field))  fields,
    String                        _field_name,
    Word32                        _field_value
  )=
  fields <- [session_field(_field_name, word32_t, var(word32(_field_value))) . *fields]
.

public define One
  replace_Word32
  (
    Var(List(WEB_Session_Field))  fields,
    String                        _field_name,
    Word32                        _field_value
  )=
  replace_any(fields, word32_t, _field_name, word32(_field_value))
.

public define One
  remove_Word32
  (
    Var(List(WEB_Session_Field))  fields,
    String                        _field_name
  )=
  remove_any(fields, word32_t, _field_name)
.

  /*************** Word16 *****************/
  
  Maybe(Word16) get_Word16(fields, _field_name)
  Word16        get_Word16(fields, _field_name, default_value)
  
public define Maybe(Word16)
  get_Word16
  (
    Var(List(WEB_Session_Field))  fields,
    String                        _field_name,
  ) =
  if get_field(*fields, word16_t, _field_name) is
  {
    failure         then failure,
    success(datum)  then 
      if datum is word16(value) then
        success(value)
      else
        failure
  }
.

public define Word16
  get_Word16
  (
    Var(List(WEB_Session_Field))  fields,
    String                        _field_name,
    Word16                  default_value
  ) =
  if get_Word16(fields, _field_name) is
  {
    failure         then default_value
    success(value)  then value
  }.

public define One
  put_Word16
  (
    Var(List(WEB_Session_Field))  fields,
    String                  _field_name,
    Word16                  _field_value
  )=
  fields <- [session_field(_field_name, word16_t, var(word16(_field_value))) . *fields]
.

public define One
  replace_Word16
  (
    Var(List(WEB_Session_Field))  fields,
    String                        _field_name,
    Word16                        _field_value
  )=
  replace_any(fields, word16_t, _field_name, word16(_field_value))
.

public define One
  remove_Word16
  (
    Var(List(WEB_Session_Field))  fields,
    String                        _field_name
  )=
  remove_any(fields, word16_t, _field_name)
.

  /*************** Word8 *****************/
  
  Maybe(Word8) get_Word8(fields, _field_name)
  Word8        get_Word8(fields, _field_name, default_value)
  
public define Maybe(Word8)
  get_Word8
  (
    Var(List(WEB_Session_Field))  fields,
    String                        _field_name,
  ) =
  if get_field(*fields, word8_t, _field_name) is
  {
    failure         then failure,
    success(datum)  then 
      if datum is word8(value) then
        success(value)
      else
        failure
  }
.

public define Word8
  get_Word8
  (
    Var(List(WEB_Session_Field))  fields,
    String                        _field_name,
    Word8                         default_value
  ) =
  if get_Word8(fields, _field_name) is
  {
    failure         then default_value
    success(value)  then value
  }.

public define One
  put_Word8
  (
    Var(List(WEB_Session_Field))  fields,
    String                        _field_name,
    Word8                         _field_value
  )=
  fields <- [session_field(_field_name, word8_t, var(word8(_field_value))) . *fields]
.

public define One
  replace_Word8
  (
    Var(List(WEB_Session_Field))  fields,
    String                        _field_name,
    Word8                         _field_value
  )=
  replace_any(fields, word8_t, _field_name, word8(_field_value))
.

public define One
  remove_Word8
  (
    Var(List(WEB_Session_Field))  fields,
    String                        _field_name
  )=
  remove_any(fields, word8_t, _field_name)
.

  /*************** Word4 *****************/
  
  Maybe(Word4) get_Word4(fields, _field_name)
  Word4        get_Word4(fields, _field_name, default_value)
  
public define Maybe(Word4)
  get_Word4
  (
    Var(List(WEB_Session_Field))  fields,
    String                        _field_name,
  ) =
  if get_field(*fields, word4_t, _field_name) is
  {
    failure         then failure,
    success(datum)  then 
      if datum is word4(value) then
        success(value)
      else
        failure
  }
.

public define Word4
  get_Word4
  (
    Var(List(WEB_Session_Field))  fields,
    String                        _field_name,
    Word4                   default_value
  ) =
  if get_Word4(fields, _field_name) is
  {
    failure         then default_value
    success(value)  then value
  }.

public define One
  put_Word4
  (
    Var(List(WEB_Session_Field))  fields,
    String                        _field_name,
    Word4                         _field_value
  )=
  fields <- [session_field(_field_name, word4_t, var(word4(_field_value))) . *fields]
.

public define One
  replace_Word4
  (
    Var(List(WEB_Session_Field))  fields,
    String                        _field_name,
    Word4                         _field_value
  )=
  replace_any(fields, word4_t, _field_name, word4(_field_value))
.

public define One
  remove_Word4
  (
    Var(List(WEB_Session_Field))  fields,
    String                        _field_name
  )=
  remove_any(fields, word4_t, _field_name)
.

public define String
  dump_WEB_Session_Field
  (
    WEB_Session_Field _field
  )=
  with name = "Name = ["+_field.field_name+"]",
  if *_field.field_datum is
  {
    string(_string)           then  name+", Type = String,  Value = ["+_string+"]",
    bool(_bool)               then  name+", Type = Bool,    Value = ["+to_String(_bool)+"]",
    int(_int)                 then  name+", Type = Int,     Value = ["+_int+"]",
    message(_message)         then  name+", Type = Message, Value = ["+dump(_message)+"]",
    byte_array(_byte_array)   then  name+", Type = ByteArray",
    float(_float)             then  name+", Type = Float,   Value = ["+float_to_string(_float, 10)+"]",
    word128(_word128)         then  name+", Type = Word128, Value = ["+to_decimal(_word128)+"]",    
    word64(_word64)           then  name+", Type = Word64,  Value = ["+to_decimal(_word64)+"]",
    word32(_word32)           then  name+", Type = Word32,  Value = ["+to_decimal(_word32)+"]",
    word16(_word16)           then  name+", Type = Word16,  Value = ["+to_decimal(_word16)+"]",
    word8(_word8)             then  name+", Type = Word8,   Value = ["+to_decimal(_word8)+"]",
    word4(_word4)             then  name+", Type = Word4,   Value = ["+to_decimal(_word4)+"]",
  }
.

public define String
  dump_WEB_Session_Field_list
  (
    List(WEB_Session_Field) _fields
  )=
  join("\n", map((WEB_Session_Field _field) |-> dump_WEB_Session_Field(_field), _fields))
.


public define String
  dump_WEB_Session_Fields
  (
    List(WEB_Session_Field) _fields
  )=
  "\n"+
  "-- BEGIN Fields of Session:---------------- \n"+  
  join("\n", map((WEB_Session_Field _field) |-> dump_WEB_Session_Field(_field), _fields))+
  "\n-- END Fields of Session:---------------- \n"  
.

public define String
  dump_WEB_Session_Fields
  (
    Var(List(WEB_Session_Field)) _fields
  )=
  dump_WEB_Session_Fields(*_fields)
.

 *---------------------- DUMP ------------------*
  
    String                  language,
    List(WEB_Session_Field) fields,
    WEB_Request             web_request,
    WEB_Request             previous_web_request
    
public define String
  dump
  (
    WEB_Session _session
  )=
  since _session is web_session(language, fields, web_request, previous_web_request),
  "WEB Session Dump: \n"+
  "----------------- \n"+
  "Language : ["+language+"]\n\n"+
  dump_WEB_Session_Fields(*fields)+
  "-----------------------------------------------------------------------------\n"+  
  "Current WEB REQUEST:\n"+
  "-----------------------------------------------------------------------------\n"+
  "http_info:\n"+
  dump_http_info(web_request.http_info)+"\n"+
  "web arguments:"+
  dump_web_arg_values(web_request.lwa)+"\n\n"+
  "-----------------------------------------------------------------------------\n"+  
  "Previous WEB REQUEST:\n"+
  "-----------------------------------------------------------------------------\n"+  
  "is https "+to_String(previous_web_request.is_https)+"\n"+
  "http_info:\n"+
  dump_http_info(previous_web_request.http_info)+"\n"+
  "web arguments:"+
  dump_web_arg_values(previous_web_request.lwa)+"\n"  
  
.