/usr/share/ada/adainclude/gnatcoll/gnatcoll-email.adb is in libgnatcoll16.1.0-dev 17.0.2017-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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-- G N A T C O L L --
-- --
-- Copyright (C) 2006-2017, AdaCore --
-- --
-- This library is free software; you can redistribute it and/or modify it --
-- under terms of the GNU General Public License as published by the Free --
-- Software Foundation; either version 3, or (at your option) any later --
-- version. This library is distributed in the hope that it will be useful, --
-- but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHAN- --
-- TABILITY or FITNESS FOR A PARTICULAR PURPOSE. --
-- --
-- --
-- --
-- --
-- --
-- You should have received a copy of the GNU General Public License and --
-- a copy of the GCC Runtime Library Exception along with this program; --
-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
-- <http://www.gnu.org/licenses/>. --
-- --
------------------------------------------------------------------------------
pragma Ada_2012;
with Ada.Calendar; use Ada.Calendar;
with Ada.Characters.Handling; use Ada.Characters.Handling;
with Ada.Containers; use Ada.Containers;
with Ada.Strings.Fixed; use Ada.Strings.Fixed;
with Ada.Text_IO; use Ada.Text_IO;
with Ada.Unchecked_Deallocation;
with GNATCOLL.Email.Utils; use GNATCOLL.Email.Utils;
with GNATCOLL.Utils; use GNATCOLL.Utils;
with GNATCOLL.VFS; use GNATCOLL.VFS;
with GNAT.Strings; use GNAT.Strings;
package body GNATCOLL.Email is
use Header_List, Charset_String_List, Message_List;
function Identify_Header (Name : String) return Any_Header;
-- Determine whether Name is the name of an Addr_Header or Other_Header
procedure To_String
(Payload : Message_Payload;
Header_Max_Line_Len : Positive;
Content_Filter : Payload_Filter := null;
Msg : Message'Class;
Append_To : in out Unbounded_String);
-- Encode the payload in a form suitable to send the message.
-- If necessary, this creates the "boundary" for the message.
procedure To_String
(Headers : Header_List.List;
Header_Max_Line_Len : Positive;
Subject_Max_Line_Len : Positive;
Filter : Header_Filter := null;
Append_To : in out Unbounded_String);
-- Encode the headers in a form suitable to send the message
procedure Get_Param_Index
(H : Header'Class;
Param_Name : String;
C : out Charset_String_List.Cursor;
Semicolon : out Integer;
Name_Start : out Integer;
Name_End : out Integer;
Value_End : out Integer);
-- Find the occurrence of a parameter in the value of H
procedure Replace_Header_Internal
(Msg : Message'Class; H : Header'Class; Append : Boolean);
-- Same as Replace_Header, but Append can be used to specify whether the
-- header should be appended or prepended to the list if it didn't exist
-- yet.
function Check_Boundary
(Msg : Message'Class; Boundary : String) return Boolean;
-- Whether Boundary can be used for this message
function Has_Line_Starting_With
(Text : Unbounded_String; Starts_With : String) return Boolean;
-- Whether Text has a line that starts with Starts_With
function Clone_Header (Ref : Header) return Header;
-- Return a deep copy of the given Header.
function Clone_Headers (Ref : Header_List.List) return Header_List.List;
-- Return a deep copy of the given list of headers.
procedure Set_From_Header
(Msg : in out Message'Class;
From_Email : String;
From_Real_Name : String;
Charset : String);
-- Create and set a From: header for Msg using the given email address and
-- real name. The real name has the indicated Charset.
Encoding_Names : constant array (Encoding_Type) of access constant String :=
(Encoding_7bit => new String'("7bit"),
Encoding_8bit => new String'("8bit"),
Encoding_Binary => new String'("binary"),
Encoding_QP => new String'("quoted-printable"),
Encoding_Base64 => new String'("base64"));
---------
-- "=" --
---------
function "=" (Addr1, Addr2 : Email_Address) return Boolean is
begin
return To_Lower (To_String (Addr1.Address))
= To_Lower (To_String (Addr2.Address));
end "=";
---------------------
-- Next_Occurrence --
---------------------
function Next_Occurrence
(S : String;
Char : Character;
Skip_Quotes : Boolean := False) return Integer
is
In_Quotes : Boolean := False;
begin
for Index in S'Range loop
if Skip_Quotes and then S (Index) = '"' then
In_Quotes := not In_Quotes;
elsif S (Index) = Char and then not In_Quotes then
return Index;
end if;
end loop;
return S'Last + 1;
end Next_Occurrence;
---------------------
-- Identify_Header --
---------------------
function Identify_Header (Name : String) return Any_Header is
L_Name : constant String := To_Lower (Name);
begin
if L_Name = "from"
or else L_Name = "sender"
or else L_Name = "to"
or else L_Name = "cc"
or else L_Name = "bcc"
then
return Addr_Header;
else
return Other_Header;
end if;
end Identify_Header;
-------------------
-- Is_Whitespace --
-------------------
function Is_Whitespace (Char : Character) return Boolean is
begin
return Char = ' ' or Char = ASCII.HT;
end Is_Whitespace;
----------------------
-- Skip_Whitespaces --
----------------------
procedure Skip_Whitespaces (S : String; Index : in out Integer) is
begin
while Index <= S'Last
and then (Is_Whitespace (S (Index)) or else S (Index) = ASCII.LF)
loop
Index := Index + 1;
end loop;
end Skip_Whitespaces;
-----------------
-- New_Message --
-----------------
function New_Message
(MIME_Type : String := Text_Plain;
Charset : String := Charset_US_ASCII) return Message
is
Pay : Message_Payload;
Msg : Message;
begin
if Get_Main_Type (MIME_Type) = "multipart" then
Pay := Null_Multipart_Payload;
else
Pay := Null_Payload;
end if;
Msg := (Ada.Finalization.Controlled
with Contents => new Message_Record'
(Ref_Count => 1,
Envelope_From => Null_Unbounded_String,
Headers => Header_List.Empty_List,
Is_Nested => False,
Payload => Pay));
if MIME_Type /= "" then
Replace_Header
(Msg,
Create ("Content-Type",
MIME_Type & "; charset=""" & Charset & '"'));
end if;
return Msg;
end New_Message;
------------------
-- Clone_Header --
------------------
function Clone_Header (Ref : Header) return Header is
Copy : constant Header := (Ada.Finalization.Controlled
with Contents => new Header_Record);
begin
Copy.Contents.all := (Name => Ref.Contents.Name,
Value => Ref.Contents.Value,
Ref_Count => 1);
return Copy;
end Clone_Header;
-------------------
-- Clone_Headers --
-------------------
function Clone_Headers (Ref : Header_List.List) return Header_List.List is
Copy : Header_List.List;
Cursor : Header_List.Cursor := First (Ref);
begin
while Cursor /= Header_List.No_Element loop
Append (Copy, Clone_Header (Element (Cursor)));
Next (Cursor);
end loop;
return Copy;
end Clone_Headers;
-------------------
-- Clone_Message --
-------------------
function Clone_Message (Msg : Message) return Message is
New_Msg : Message;
begin
New_Msg := (Ada.Finalization.Controlled
with Contents => new Message_Record);
New_Msg.Contents.all := (Ref_Count => 1,
Envelope_From => Msg.Contents.Envelope_From,
Headers => Clone_Headers (Msg.Contents.Headers),
Payload => Msg.Contents.Payload,
Is_Nested => Msg.Contents.Is_Nested);
return New_Msg;
end Clone_Message;
--------------
-- Reply_To --
--------------
function Reply_To
(Msg : Message'Class;
From_Email : String;
From_Real_Name : String := "";
Quote : Boolean := True;
Reply_All : Boolean := True;
Reply_Filter : access function
(Recipient : Email_Address) return Boolean
:= null;
Local_Date : Ada.Calendar.Time := Ada.Calendar.Clock;
Charset : String := Charset_US_ASCII) return Message
is
Reply : Message := New_Message;
H, H2, H3 : Header;
Is_First : Boolean;
To_Quote : Unbounded_String;
Part_Iter : Payload_Iterator;
Payload : Message;
Who_Quoted : Unbounded_String;
begin
Set_Envelope_From (Reply, From_Email, Local_Date);
H := Get_Header (Msg, "Subject");
if H /= Null_Header then
H2 := Create ("Subject", "Re: ");
Append (H2, Get_Value (H));
Replace_Header_Internal (Reply, H2, Append => False);
end if;
Replace_Header_Internal
(Reply, Create ("Date", Format_Date (Local_Date)), Append => False);
Set_From_Header (Reply, From_Email, From_Real_Name, Charset);
H := Get_Header (Msg, "From");
H2 := Create ("To", "");
if H /= Null_Header then
Append (H2, Get_Value (H));
Flatten (H.Contents.Value, Result => Who_Quoted);
Who_Quoted := Parse_Address (To_String (Who_Quoted)).Address;
end if;
Add_Header (Reply, H2);
if Reply_All then
H2 := Create ("Cc", "");
Is_First := True;
for Recipient of Get_Recipients (Msg) loop
if Reply_Filter = null or else Reply_Filter (Recipient) then
if Is_First then
Is_First := False;
else
Append (H2, ", ");
end if;
Append (H2, Format_Address (Recipient));
end if;
end loop;
if not Is_First then
Add_Header (Reply, H2);
end if;
end if;
H := Get_Header (Msg, "Message-Id");
if H /= Null_Header then
H2 := Create ("In-Reply-To", "");
Append (H2, Get_Value (H));
Add_Header (Reply, H2);
H2 := Create ("References", "");
H3 := Get_Header (Msg, "References");
if H3 /= Null_Header then
Append (H2, Get_Value (H3));
else
H3 := Get_Header (Msg, "In-Reply-To");
if H3 /= Null_Header then
Append (H2, Get_Value (H3));
end if;
end if;
Append (H2, Get_Value (H));
Add_Header (Reply, H2);
end if;
if Quote then
if Is_Multipart (Msg) then
To_Quote := Null_Unbounded_String;
Part_Iter := Get_Payload (Msg);
loop
Next (Part_Iter, Item => Payload);
exit when Payload = Null_Message;
if Get_Main_Type (Get_Content_Type (Payload)) = "text" then
Get_Single_Part_Payload (Payload, To_Quote, Decode => True);
exit;
end if;
end loop;
elsif Get_Main_Type (Get_Content_Type (Msg)) = "text" then
Get_Single_Part_Payload (Msg, To_Quote, Decode => True);
else
To_Quote := Null_Unbounded_String;
end if;
if To_Quote /= Null_Unbounded_String then
if Who_Quoted /= Null_Unbounded_String then
Append (Who_Quoted, " wrote:" & ASCII.LF);
end if;
declare
StrA : constant String := To_String (To_Quote);
Start, Eol : Integer;
begin
Start := StrA'First;
while Start <= StrA'Last loop
Eol := Integer'Min
(StrA'Last,
Next_Occurrence (StrA (Start .. StrA'Last), ASCII.LF));
Append (Who_Quoted, "> " & StrA (Start .. Eol));
Start := Eol + 1;
end loop;
Set_Text_Payload (Reply, To_String (Who_Quoted));
end;
end if;
end if;
return Reply;
end Reply_To;
-------------------------
-- Set_Default_Headers --
-------------------------
procedure Set_Default_Headers
(Msg : in out Message'Class;
From_Email : String;
Subject : String := "No Subject";
From_Real_Name : String := "";
Local_Date : Ada.Calendar.Time := Ada.Calendar.Clock;
Charset : String := Charset_US_ASCII)
is
begin
Set_Envelope_From (Msg, From_Email, Local_Date);
Replace_Header_Internal (Msg,
Create ("Subject", Subject, Charset), Append => False);
Replace_Header_Internal (Msg,
Create ("Date", Format_Date (Local_Date)), Append => False);
Set_From_Header (Msg, From_Email, From_Real_Name, Charset);
end Set_Default_Headers;
---------------------
-- Set_From_Header --
---------------------
procedure Set_From_Header
(Msg : in out Message'Class;
From_Email : String;
From_Real_Name : String;
Charset : String)
is
From_H : Header;
begin
From_H := Create
("From",
Charset_String_List.List'(Format_Address
(Email =>
(Real_Name => To_Unbounded_String (From_Real_Name),
Address => To_Unbounded_String (From_Email)),
Charset => Charset)));
Replace_Header_Internal (Msg, From_H, Append => False);
end Set_From_Header;
------------
-- Adjust --
------------
procedure Adjust (Msg : in out Message) is
begin
if Msg.Contents /= null then
Msg.Contents.Ref_Count := Msg.Contents.Ref_Count + 1;
end if;
end Adjust;
--------------
-- Finalize --
--------------
procedure Finalize (Msg : in out Message) is
procedure Unchecked_Free is new Ada.Unchecked_Deallocation
(Message_Record, Message_Access);
Contents : Message_Access := Msg.Contents;
begin
Msg.Contents := null; -- Make Finalize idempotent
if Contents /= null then
Contents.Ref_Count := Contents.Ref_Count - 1;
if Contents.Ref_Count = 0 then
Unchecked_Free (Contents);
end if;
end if;
end Finalize;
-----------------------
-- Set_Envelope_From --
-----------------------
procedure Set_Envelope_From (Msg : in out Message'Class; From : String) is
begin
Msg.Contents.Envelope_From := To_Unbounded_String (From);
end Set_Envelope_From;
-----------------------
-- Set_Envelope_From --
-----------------------
procedure Set_Envelope_From
(Msg : in out Message'Class;
Email : String;
Local_Date : Ada.Calendar.Time)
is
begin
Msg.Contents.Envelope_From := To_Unbounded_String
("From " & Email & " " & Format_Date (Local_Date, From_Line => True));
end Set_Envelope_From;
-----------------------
-- Get_Envelope_From --
-----------------------
function Get_Envelope_From (Msg : Message'Class) return String is
begin
return To_String (Msg.Contents.Envelope_From);
end Get_Envelope_From;
------------------------
-- Date_From_Envelope --
------------------------
function Date_From_Envelope
(Msg : Message'Class) return Ada.Calendar.Time
is
Str : constant String := To_String (Msg.Contents.Envelope_From);
Index : Natural := Str'First;
begin
if Str = "" then
return No_Time;
end if;
Index := Index + 5; -- Skips "From "
Skip_Whitespaces (Str, Index);
while Index <= Str'Last
and then not Is_Whitespace (Str (Index))
loop
Index := Index + 1;
end loop;
return To_Time (Str (Index .. Str'Last), Format => Time_Envelope);
end Date_From_Envelope;
--------------------------
-- Sender_From_Envelope --
--------------------------
function Sender_From_Envelope (Msg : Message'Class) return String is
Str : constant String := To_String (Msg.Contents.Envelope_From);
Index : Natural := Str'First + 5; -- Skips "From"
Stop : Natural;
begin
Skip_Whitespaces (Str, Index);
Stop := Index;
while Stop <= Str'Last
and then not Is_Whitespace (Str (Stop))
loop
Stop := Stop + 1;
end loop;
return Str (Index .. Stop - 1);
end Sender_From_Envelope;
------------
-- Create --
------------
function Create
(Name : String;
Value : String;
Charset : String := Charset_US_ASCII) return Header
is
V : Charset_String_List.List;
begin
Decode_Header (Value,
Default_Charset => Charset,
Result => V,
Where => Identify_Header (Name));
return Create (Name, V);
end Create;
function Create
(Name : String;
Value : Charset_String_List.List) return Header
is
begin
return (Ada.Finalization.Controlled with
Contents =>
new Header_Record'
(Name => To_Unbounded_String (To_Lower (Name)),
Value => Value,
others => <>));
end Create;
------------
-- Append --
------------
procedure Append
(H : in out Header'Class;
Value : String;
Charset : String := Charset_US_ASCII)
is
L : Charset_String_List.List;
begin
Decode_Header (Value,
Default_Charset => Charset,
Result => L,
Where => Identify_Header (To_String (H.Contents.Name)));
Splice (H.Contents.Value, Charset_String_List.No_Element, L);
end Append;
------------
-- Append --
------------
procedure Append
(H : in out Header'Class; Value : Charset_String_List.List)
is
C : Charset_String_List.Cursor := First (Value);
begin
while Has_Element (C) loop
Append (H.Contents.Value, Element (C));
Next (C);
end loop;
end Append;
---------------
-- To_String --
---------------
procedure To_String
(H : Header'Class;
Max_Line_Len : Positive := Default_Max_Header_Line_Length;
Show_Header_Name : Boolean := True;
Result : out Unbounded_String)
is
begin
if H.Contents = null then
Result := Null_Unbounded_String;
return;
end if;
declare
Max : Positive := Max_Line_Len - 2 - Length (H.Contents.Name);
N : String := To_String (H.Contents.Name);
Value : constant Charset_String_List.List := Get_Value (H);
Encoded : Unbounded_String;
Uppercase_Next : Boolean;
Next : Natural;
begin
To_String (Value, Encoded, Identify_Header (N));
if Show_Header_Name then
-- Fix up casing of header name
if N = "message-id" then
N := Message_ID;
elsif N = "cc" then
N := CC;
else
if N'Length >= 5
and then N (N'First .. N'First + 4) = "mime-"
then
N (N'First .. N'First + 3) := "MIME";
Next := N'First + 5;
else
Next := N'First;
end if;
Uppercase_Next := True;
while Next <= N'Last loop
if Uppercase_Next then
N (Next) := To_Upper (N (Next));
Uppercase_Next := False;
end if;
if N (Next) = '-' then
Uppercase_Next := True;
end if;
Next := Next + 1;
end loop;
end if;
end if;
-- Fold continuation lines
declare
Str : String := To_String (Encoded);
Last : Natural;
Index, Index2 : Integer;
Offset : Integer := 0;
-- Count of LF characters skipped so far
begin
-- Flatten the header on a single line, eliminating newline
-- characters.
for J in Str'Range loop
if Str (J) = ASCII.LF then
Offset := Offset + 1;
elsif Offset > 0 then
Str (J - Offset) := Str (J);
end if;
end loop;
Last := Str'Last - Offset;
if Show_Header_Name and then Last <= Max then
if Last = 0 then -- Empty header
Result := To_Unbounded_String (N & ": ");
elsif Element (Encoded, 1) = ' ' then
Result := To_Unbounded_String (N & ':' & Str (1 .. Last));
else
Result := To_Unbounded_String (N & ": " & Str (1 .. Last));
end if;
return;
elsif not Show_Header_Name and then Last <= Max_Line_Len then
if Offset = 0 then
Result := Encoded; -- Save a string copy
else
Result := To_Unbounded_String (Str (1 .. Last));
end if;
return;
end if;
Result := Null_Unbounded_String;
Index := Str'First;
while Index <= Last loop
-- Only split on spaces. To keep Content-Type headers as much
-- as possible on a single line, we split on the first blank
-- space after the theoretical split point.
Index2 := Integer'Min (Index + Max - 1, Last);
loop
Index2 := Index2 + 1;
exit when Index2 > Last or else Str (Index2) = ' ';
end loop;
-- Index2 points right after last non-blank character
Append (Result, Str (Index .. Index2 - 1));
-- Do not print a last line containing only white spaces, this
-- might confuse mailers.
if Index2 < Last then
Append (Result, ASCII.LF & ' ');
end if;
Index := Index2 + 1;
Max := Max_Line_Len;
end loop;
if Show_Header_Name then
if Length (Result) = 0 or else Element (Result, 1) = ' ' then
Result := N & ':' & Result;
else
Result := N & ": " & Result;
end if;
end if;
end;
end;
end To_String;
function To_String
(H : Header'Class;
Max_Line_Len : Positive := Default_Max_Header_Line_Length;
Show_Header_Name : Boolean := True) return String
is
Result : Unbounded_String;
begin
To_String (H, Max_Line_Len, Show_Header_Name, Result);
return To_String (Result);
end To_String;
---------------
-- To_String --
---------------
procedure To_String
(Payload : Message_Payload;
Header_Max_Line_Len : Positive;
Content_Filter : Payload_Filter := null;
Msg : Message'Class;
Append_To : in out Unbounded_String)
is
C : Message_List.Cursor;
Attachment : Message;
begin
case Payload.Multipart is
when True =>
declare
Parts : array (1 .. Length (Payload.Parts)) of Boolean :=
(others => True);
Payload_Count : Natural := Parts'Length;
begin
-- First check how many payloads needs to be output
if Content_Filter /= null then
C := First (Payload.Parts);
Payload_Count := 0;
for P in Parts'Range loop
Parts (P) := Content_Filter (Element (C));
if Parts (P) then
Payload_Count := Payload_Count + 1;
end if;
Next (C);
end loop;
end if;
-- At least one payload : create a boundary if necessary
if Payload_Count > 0 then
Set_Boundary (Msg);
end if;
declare
Boundary : constant String := Get_Boundary (Msg);
begin
if Payload.Preamble /= Null_Unbounded_String then
Append (Append_To, Payload.Preamble);
end if;
C := First (Payload.Parts);
for P in Parts'Range loop
if Parts (P) then
Append (Append_To,
ASCII.LF & "--" & Boundary & ASCII.LF);
Attachment := Element (C);
To_String (Attachment.Contents.Headers,
Header_Max_Line_Len,
Header_Max_Line_Len,
Append_To => Append_To);
To_String (Attachment.Contents.Payload,
Header_Max_Line_Len,
Msg => Attachment,
Append_To => Append_To);
end if;
Next (C);
end loop;
Append
(Append_To, ASCII.LF & "--" & Boundary & "--" & ASCII.LF);
if Payload.Epilogue /= Null_Unbounded_String then
Append (Append_To, ASCII.LF & Payload.Epilogue);
end if;
end;
end;
when False =>
Append (Append_To, Payload.Text);
end case;
end To_String;
---------------
-- To_String --
---------------
procedure To_String
(Headers : Header_List.List;
Header_Max_Line_Len : Positive;
Subject_Max_Line_Len : Positive;
Filter : Header_Filter := null;
Append_To : in out Unbounded_String)
is
H : Header_List.Cursor := First (Headers);
Tmp : Unbounded_String;
begin
while Has_Element (H) loop
if Filter = null or else Filter (Element (H)) then
if Get_Name (Element (H)) = "subject" then
To_String (Element (H), Subject_Max_Line_Len, Result => Tmp);
else
To_String (Element (H), Header_Max_Line_Len, Result => Tmp);
end if;
if Tmp /= Null_Unbounded_String then
Append (Append_To, Tmp);
Append (Append_To, ASCII.LF);
end if;
end if;
Next (H);
end loop;
Append (Append_To, ASCII.LF);
end To_String;
----------
-- Size --
----------
function Size
(Msg : Message;
Include_Attachments : Boolean) return Long_Integer
is
Total : Long_Integer := 0;
C : Message_List.Cursor;
begin
if Is_Multipart (Msg) then
Total := Total + Long_Integer (Length (Msg.Contents.Payload.Preamble))
+ Long_Integer (Length (Msg.Contents.Payload.Epilogue));
C := First (Msg.Contents.Payload.Parts);
while Has_Element (C) loop
if Include_Attachments then
Total := Total + Size (Element (C), True);
elsif Get_Content_Type (Element (C)) = Text_Plain then
Total := Total + Size (Element (C), True);
exit;
end if;
Next (C);
end loop;
else
Total := Total + Long_Integer (Length (Msg.Contents.Payload.Text));
end if;
return Total;
end Size;
---------------
-- To_String --
---------------
procedure To_String
(Msg : Message'Class;
Envelope : Boolean := False;
Header_Max_Line_Len : Positive := Default_Max_Header_Line_Length;
Subject_Max_Line_Len : Positive := Default_Max_Header_Line_Length;
Content_Filter : Payload_Filter := null;
Filter : Header_Filter := null;
Decode : Boolean := False;
Quote_From : Boolean := False;
Result : out Unbounded_String)
is
Encoded_Payload : Unbounded_String;
Payload : Unbounded_String;
Encoding : Encoding_Type;
Encoding_Str : Unbounded_String;
function Retain_Header (H : Header'Class) return Boolean;
-- Filter for header list: if Decode is True, strip the MIME
-- Content-Transfer-Encoding; else just apply Filter.
-------------------
-- Retain_Header --
-------------------
function Retain_Header (H : Header'Class) return Boolean is
begin
if Decode
and then Get_Name (H) = To_Lower (Content_Transfer_Encoding)
then
return False;
elsif Filter /= null then
return Filter (H);
else
return True;
end if;
end Retain_Header;
-- Start of processing for To_String
begin
Result := Null_Unbounded_String;
if Envelope then
Append (Result, Msg.Contents.Envelope_From);
Append (Result, ASCII.LF);
end if;
-- First convert the payload. This way we know how many payloads are
-- output, and whether a boundary is necessary or not.
To_String
(Msg.Contents.Payload, Header_Max_Line_Len,
Msg => Msg,
Content_Filter => Content_Filter,
Append_To => Encoded_Payload);
if Decode then
Encoding := Get_Encoding_Type (Msg);
case Encoding is
when Encoding_Base64 =>
Base64_Decode (To_String (Encoded_Payload), Payload);
Encoding := Encoding_8bit;
when Encoding_QP =>
Quoted_Printable_Decode (To_String (Encoded_Payload), Payload);
Encoding := Encoding_8bit;
when others =>
Payload := Encoded_Payload;
end case;
else
Payload := Encoded_Payload;
end if;
To_String
(Msg.Contents.Headers, Header_Max_Line_Len,
Subject_Max_Line_Len, Retain_Header'Unrestricted_Access,
Append_To => Result);
if Decode and then Encoding /= Encoding_7bit then
To_String
(Create (Content_Transfer_Encoding, Encoding_Names (Encoding).all),
Result => Encoding_Str);
-- Splice new CTE header before empty line at end of headers
declare
L : constant Natural := Length (Result);
begin
Replace_Slice (Result,
L, L - 1, To_String (Encoding_Str) & ASCII.LF);
end;
end if;
if Quote_From then
declare
Payload_Str : constant String := To_String (Payload);
J : Integer := Payload_Str'First;
Copy_From : Natural := Payload_Str'First;
begin
while J < Payload_Str'Last loop
-- Skip until the beginning of a new line
while J < Payload_Str'Last
and then Payload_Str (J) = ASCII.LF
loop
J := J + 1;
end loop;
-- If the new line starts with From_
if J + 4 <= Payload_Str'Length
and then Payload_Str (J .. J + 4) = "From "
then
Append (Result, Payload_Str (Copy_From .. J - 1));
Append (Result, ">");
Copy_From := J;
J := J + 5;
end if;
-- Skip till end of line
while J < Payload_Str'Last
and then Payload_Str (J) /= ASCII.LF
loop
J := J + 1;
end loop;
end loop;
Append (Result, Payload_Str (Copy_From .. Payload_Str'Last));
end;
else
Append (Result, Payload);
end if;
end To_String;
-------------
-- To_Time --
-------------
function To_Time (H : Header'Class) return Ada.Calendar.Time is
Tmp : Unbounded_String;
begin
-- For portability, we could use To_String (H.Value), but that is
-- slower.
if H.Contents = null then
return No_Time;
else
Flatten (H.Contents.Value, Result => Tmp);
return To_Time (To_String (Tmp));
end if;
end To_Time;
----------------
-- Add_Header --
----------------
procedure Add_Header (Msg : in out Message'Class; H : Header'Class) is
begin
Append (Msg.Contents.Headers, Header (H));
end Add_Header;
----------------
-- Get_Header --
----------------
function Get_Header (Msg : Message'Class; Name : String) return Header is
Iter : Header_List.Cursor;
N : constant String := To_Lower (Name);
begin
if Msg.Contents /= null then
Iter := First (Msg.Contents.Headers);
while Has_Element (Iter) loop
if Element (Iter).Contents.Name = N then
return Element (Iter);
end if;
Next (Iter);
end loop;
end if;
return Null_Header;
end Get_Header;
--------------------
-- Delete_Headers --
--------------------
procedure Delete_Headers (Msg : Message'Class; Name : String) is
Iter : Header_List.Cursor := First (Msg.Contents.Headers);
Iter2 : Header_List.Cursor;
N : constant String := To_Lower (Name);
begin
while Has_Element (Iter) loop
Iter2 := Next (Iter);
if Name = ""
or else Element (Iter).Contents.Name = N
then
Delete (Msg.Contents.Headers, Iter);
end if;
Iter := Iter2;
end loop;
end Delete_Headers;
-------------------
-- Delete_Header --
-------------------
procedure Delete_Header (Msg : Message'Class; H : Header'Class) is
Iter : Header_List.Cursor := First (Msg.Contents.Headers);
begin
while Has_Element (Iter) loop
if Element (Iter).Contents = H.Contents then
Delete (Msg.Contents.Headers, Iter);
return;
end if;
Next (Iter);
end loop;
end Delete_Header;
--------------------
-- Replace_Header --
--------------------
procedure Replace_Header (Msg : Message'Class; H : Header'Class) is
begin
Replace_Header_Internal (Msg, H, Append => True);
end Replace_Header;
-----------------------------
-- Replace_Header_Internal --
-----------------------------
procedure Replace_Header_Internal
(Msg : Message'Class; H : Header'Class; Append : Boolean)
is
Iter : Header_List.Cursor := First (Msg.Contents.Headers);
Iter2 : Header_List.Cursor;
Is_First : Boolean := True;
begin
while Has_Element (Iter) loop
Iter2 := Next (Iter);
if Element (Iter).Contents.Name = H.Contents.Name then
if Is_First then
Replace_Element (Msg.Contents.Headers, Iter, Header (H));
Is_First := False;
else
Delete (Msg.Contents.Headers, Iter);
end if;
end if;
Iter := Iter2;
end loop;
if Is_First then
if Append then
Header_List.Append (Msg.Contents.Headers, Header (H));
else
Prepend (Msg.Contents.Headers, Header (H));
end if;
end if;
end Replace_Header_Internal;
-----------------
-- Get_Headers --
-----------------
function Get_Headers
(Msg : Message'Class; Name : String := "") return Header_Iterator
is
C : Header_List.Cursor := First (Msg.Contents.Headers);
N : constant Unbounded_String := To_Unbounded_String (To_Lower (Name));
begin
if Name /= "" then
while Has_Element (C)
and then Element (C).Contents.Name /= N
loop
Next (C);
end loop;
end if;
return (C, N);
end Get_Headers;
----------
-- Next --
----------
function Next
(Iter : in out Header_Iterator; H : out Header) return Boolean is
begin
if Has_Element (Iter.Cursor) then
H := Element (Iter.Cursor);
Next (Iter.Cursor);
if Length (Iter.Name) /= 0 then
while Has_Element (Iter.Cursor)
and then Element (Iter.Cursor).Contents.Name /= Iter.Name
loop
Next (Iter.Cursor);
end loop;
end if;
return True;
end if;
return False;
end Next;
----------
-- Next --
----------
procedure Next (Iter : in out Header_Iterator; H : out Header) is
begin
if not Next (Iter, H) then
H := Null_Header;
end if;
end Next;
----------------------
-- Set_Text_Payload --
----------------------
procedure Set_Text_Payload
(Msg : Message'Class;
Payload : String;
MIME_Type : String := Text_Plain;
Disposition : String := "";
Charset : String := Charset_US_ASCII;
Prepend : Boolean := False)
is
Msg2 : Message;
H_CT : Header := Create (Content_Type, MIME_Type);
H_CTE : Header := Null_Header;
begin
if Charset /= "" then
Set_Param (H_CT, "charset", Charset);
H_CTE := Create (Content_Transfer_Encoding,
(if Charset = Charset_US_ASCII
then "7bit"
else "8bit"));
end if;
if Msg.Contents.Payload.Multipart then
Msg2 := New_Message (MIME_Type => "");
Replace_Header (Msg2, H_CT);
if H_CTE /= Null_Header then
Replace_Header (Msg2, H_CTE);
end if;
if Disposition /= "" then
Add_Header (Msg2, Create (Content_Disposition, Disposition));
end if;
Set_Unbounded_String (Msg2.Contents.Payload.Text, Payload);
if Prepend then
Message_List.Prepend (Msg.Contents.Payload.Parts, Msg2);
else
Message_List.Append (Msg.Contents.Payload.Parts, Msg2);
end if;
else
if MIME_Type /= "" and not Prepend then
Replace_Header (Msg, H_CT);
if H_CTE = Null_Header then
Delete_Headers (Msg, Content_Transfer_Encoding);
else
Replace_Header (Msg, H_CTE);
end if;
Delete_Headers (Msg, Content_Disposition);
end if;
if Prepend then
Msg.Contents.Payload.Text := Payload & Msg.Contents.Payload.Text;
-- Incorrect if Charset does not match the charset of the existing
-- payload???
else
-- Do not use Set_Unbounded_String, which has a memory leak in the
-- GNAT implementation ???
Set_Unbounded_String (Msg.Contents.Payload.Text, Payload);
end if;
end if;
end Set_Text_Payload;
-----------------------------
-- Get_Single_Part_Payload --
-----------------------------
procedure Get_Single_Part_Payload
(Msg : Message'Class;
Payload : out Unbounded_String;
Decode : Boolean := False)
is
H : Header;
Encoding : Encoding_Type;
Encoding_Str : Unbounded_String;
begin
if Msg.Contents.Payload.Multipart then
raise Multipart_Error;
elsif Decode then
H := Get_Header (Msg, Content_Transfer_Encoding);
if H.Contents = null then
Encoding := Encoding_7bit;
else
Flatten (H.Contents.Value, Result => Encoding_Str);
declare
Encode : constant String := To_Lower
(Trim (To_String (Encoding_Str), Ada.Strings.Both));
begin
if Encode = "base64" then
Encoding := Encoding_Base64;
elsif Encode = "quoted-printable" then
Encoding := Encoding_QP;
else
Encoding := Encoding_7bit;
end if;
end;
end if;
case Encoding is
when Encoding_Base64 =>
Base64_Decode (To_String (Msg.Contents.Payload.Text), Payload);
when Encoding_QP =>
Quoted_Printable_Decode
(To_String (Msg.Contents.Payload.Text), Payload);
when others =>
Payload := Msg.Contents.Payload.Text;
end case;
else
Payload := Msg.Contents.Payload.Text;
end if;
end Get_Single_Part_Payload;
--------------
-- Get_Name --
--------------
function Get_Name (H : Header'Class) return String is
begin
return To_String (H.Contents.Name);
end Get_Name;
---------------
-- Get_Value --
---------------
function Get_Value (H : Header'Class) return Charset_String_List.List is
begin
if H.Contents = null then
return Charset_String_List.Empty_List;
else
return H.Contents.Value;
end if;
end Get_Value;
------------------
-- Set_Epilogue --
------------------
procedure Set_Epilogue (Msg : in out Message'Class; Epilogue : String) is
begin
Convert_To_Multipart (Msg);
Msg.Contents.Payload.Epilogue := To_Unbounded_String (Epilogue);
end Set_Epilogue;
------------------
-- Set_Preamble --
------------------
procedure Set_Preamble (Msg : in out Message'Class; Preamble : String) is
begin
Convert_To_Multipart (Msg);
Msg.Contents.Payload.Preamble := To_Unbounded_String (Preamble);
end Set_Preamble;
------------------
-- Is_Multipart --
------------------
function Is_Multipart (Msg : Message'Class) return Boolean is
begin
return Msg.Contents.Payload.Multipart;
end Is_Multipart;
-----------------
-- Get_Payload --
-----------------
function Get_Payload (Msg : Message'Class) return Payload_Iterator is
begin
if Msg.Contents.Payload.Multipart then
return (Cursor => First (Msg.Contents.Payload.Parts),
Msg => Null_Message);
else
return (Cursor => Message_List.No_Element,
Msg => Message (Msg));
end if;
end Get_Payload;
----------
-- Next --
----------
procedure Next (Iter : in out Payload_Iterator; Item : out Message) is
begin
if Has_Element (Iter.Cursor) then
Item := Element (Iter.Cursor);
Next (Iter.Cursor);
elsif Iter.Msg /= Null_Message then
Item := Iter.Msg;
Iter.Msg := Null_Message;
else
Item := Null_Message;
end if;
end Next;
--------------------
-- Delete_Payload --
--------------------
procedure Delete_Payload
(Msg : in out Message'Class; Iter : in out Payload_Iterator) is
begin
Delete (Msg.Contents.Payload.Parts, Iter.Cursor);
end Delete_Payload;
----------------------
-- Get_Content_Type --
----------------------
function Get_Content_Type (Msg : Message'Class) return String is
T : constant String := Get_Type (Get_Header (Msg, Content_Type));
begin
if T /= "" then
return T;
elsif Msg.Contents.Is_Nested then
return Message_RFC822;
else
return Text_Plain;
end if;
end Get_Content_Type;
--------------
-- Get_Type --
--------------
function Get_Type (H : Header) return String is
use Ada.Strings;
H_Ustr : Unbounded_String;
begin
if H = Null_Header then
return "";
end if;
Flatten (H.Contents.Value, Result => H_Ustr);
declare
H_Str : constant String := Trim (To_String (H_Ustr), Both);
SC : Integer;
begin
SC := H_Str'First;
while SC <= H_Str'Last
and then
not (Is_Whitespace (H_Str (SC)) or else H_Str (SC) = ';')
loop
SC := SC + 1;
end loop;
return To_Lower (H_Str (H_Str'First .. SC - 1));
end;
end Get_Type;
----------------------------
-- Convert_To_Single_Part --
----------------------------
procedure Convert_To_Single_Part
(Msg : in out Message'Class;
Purge : Boolean := False)
is
Attach : Message;
begin
if Msg.Contents.Payload.Multipart then
if Length (Msg.Contents.Payload.Parts) = 0 or else Purge then
Msg.Contents.Payload :=
(Multipart => False,
Text => Null_Unbounded_String);
Replace_Header (Msg, Create (Content_Type, Text_Plain));
elsif Length (Msg.Contents.Payload.Parts) = 1 then
Attach := Element (First (Msg.Contents.Payload.Parts));
if Is_Multipart (Attach) then
Msg.Contents.Payload :=
(Multipart => True,
Parts => Attach.Contents.Payload.Parts,
Preamble => Attach.Contents.Payload.Preamble,
Epilogue => Attach.Contents.Payload.Epilogue);
Replace_Header (Msg, Get_Header (Attach, Content_Type));
else
Msg.Contents.Payload :=
(Multipart => False,
Text => Attach.Contents.Payload.Text);
Replace_Header (Msg, Get_Header (Attach, Content_Type));
if Get_Header (Attach, Content_Transfer_Encoding) /=
Null_Header
then
Replace_Header
(Msg, Get_Header (Attach, Content_Transfer_Encoding));
end if;
end if;
end if;
end if;
end Convert_To_Single_Part;
--------------------------
-- Convert_To_Multipart --
--------------------------
procedure Convert_To_Multipart (Msg : Message'Class) is
MIME_Type : constant String := Get_Content_Type (Msg);
Is_Multipart_Type : constant Boolean :=
Get_Main_Type (MIME_Type) = "multipart";
begin
if not Msg.Contents.Payload.Multipart then
Convert_To_Multipart (Msg,
(if Is_Multipart_Type then MIME_Type else Multipart_Mixed));
end if;
end Convert_To_Multipart;
procedure Convert_To_Multipart
(Msg : Message'Class;
MIME_Type : String;
Force : Boolean := False)
is
Parts : Message_List.List;
Create_Nested : constant Boolean :=
Get_Content_Type (Msg) /= MIME_Type or else Force;
Part : Message;
Preamble : Unbounded_String;
procedure Move_Header (Header_Name : String);
-- Move named header from Msg to Part
-----------------
-- Move_Header --
-----------------
procedure Move_Header (Header_Name : String) is
H : constant Header := Get_Header (Msg, Header_Name);
begin
if H /= Null_Header then
Replace_Header (Part, H);
Delete_Header (Msg, H);
end if;
end Move_Header;
-- Start of processing for Convert_To_Multipart
begin
if not Msg.Contents.Payload.Multipart or else Create_Nested then
if Get_Main_Type (Get_Content_Type (Msg)) = "multipart"
and then not Create_Nested
then
-- Here we only convert the underlying payload storage
-- to multipart, but we don't change the user-visible MIME
-- structure: from the user's point of view, this is a no-op.
-- Used while parsing a message: the payload is initially
-- not Multipart, and then converted here lazily when parts
-- are parsed. Assume that the original text payload is actually
-- the multipart's preamble.
Preamble := Msg.Contents.Payload.Text;
else
-- Here to convert a MIME message with a non-multipart type to a
-- multipart, or to force creation of a nested multipart: make
-- the original payload a part in the new multipart payload (but
-- don't create an empty part).
if Msg.Contents.Payload.Multipart
or else Length (Msg.Contents.Payload.Text) > 0
then
Part := Clone_Message (Message (Msg));
Part.Contents.Headers := Header_List.Empty_List;
Move_Header (Content_Type);
Move_Header (Content_Transfer_Encoding);
Parts.Append (Part);
else
Delete_Headers (Msg, Content_Transfer_Encoding);
end if;
Replace_Header (Msg, Create (Content_Type, MIME_Type));
Replace_Header (Msg, Create (MIME_Version, "1.0"));
end if;
Msg.Contents.Payload :=
(Multipart => True,
Parts => Parts,
Preamble => Preamble,
Epilogue => Null_Unbounded_String);
end if;
end Convert_To_Multipart;
-----------------
-- Add_Payload --
-----------------
procedure Add_Payload (Msg : in out Message'Class;
Payload : Message;
First : Boolean := False) is
begin
Convert_To_Multipart (Msg);
Payload.Contents.Is_Nested := True;
if First then
Prepend (Msg.Contents.Payload.Parts, Payload);
else
Append (Msg.Contents.Payload.Parts, Payload);
end if;
end Add_Payload;
----------------
-- Attach_Msg --
----------------
procedure Attach_Msg
(Msg : in out Message'Class;
Attach : Message'Class;
Description : String := "")
is
Attachment : constant Message :=
New_Message (MIME_Type => Message_RFC822);
Tmp : Unbounded_String;
begin
if Description /= "" then
Replace_Header
(Attachment, Create (Content_Description, Description));
end if;
To_String (Attach, Result => Tmp);
Set_Text_Payload (Attachment, To_String (Tmp),
Charset => "",
MIME_Type => Message_RFC822);
Replace_Header (Attachment, Create (Content_Disposition, "inline"));
Add_Payload (Msg, Attachment);
end Attach_Msg;
------------
-- Attach --
------------
procedure Attach
(Msg : in out Message'Class;
Path : Virtual_File;
MIME_Type : String := Application_Octet_Stream;
Recommended_Filename : Virtual_File := No_File;
Description : String := "";
Charset : String := Charset_US_ASCII;
Disposition : Disposition_Type := Disposition_Attachment;
Encoding : Encoding_Type := Encoding_Base64)
is
Attachment : Message := New_Message (MIME_Type => "");
Str : GNAT.Strings.String_Access;
begin
declare
F : Unbounded_String;
begin
Convert_To_Multipart (Msg);
if Get_Main_Type (MIME_Type) = "text" then
Replace_Header
(Attachment,
Create
(Content_Type,
MIME_Type & "; charset=""" & Charset & '"'));
else
Replace_Header (Attachment, Create (Content_Type, MIME_Type));
end if;
if Description /= "" then
Replace_Header
(Attachment, Create (Content_Description, Description));
end if;
case Disposition is
when Disposition_Attachment =>
if Recommended_Filename = No_File then
Replace_Header
(Attachment,
Create
(Content_Disposition,
"attachment; filename="""
& (+Base_Name (Path)) & '"'));
else
Replace_Header
(Attachment,
Create
(Content_Disposition,
"attachment; filename="""
& (+Base_Name (Recommended_Filename)) & '"'));
end if;
when Disposition_Inline =>
if Recommended_Filename = No_File then
Replace_Header
(Attachment,
Create
(Content_Disposition,
"inline; filename="""
& (+Base_Name (Path)) & '"'));
else
Replace_Header
(Attachment,
Create
(Content_Disposition,
"inline; filename="""
& (+Base_Name (Recommended_Filename)) & '"'));
end if;
end case;
Str := Read_File (Path);
case Encoding is
when Encoding_Base64 =>
Base64_Encode
(Str.all, Charset => Charset, Where => Text, Result => F);
Add_Header (Attachment,
Create (Content_Transfer_Encoding, "base64"));
Set_Unbounded_String
(Attachment.Contents.Payload.Text, To_String (F));
when Encoding_QP =>
Quoted_Printable_Encode
(Str.all, Charset => Charset, Where => Text, Result => F);
Add_Header
(Attachment,
Create (Content_Transfer_Encoding, "quoted-printable"));
Set_Unbounded_String
(Attachment.Contents.Payload.Text, To_String (F));
when Encoding_7bit =>
Add_Header
(Attachment, Create (Content_Transfer_Encoding, "7bit"));
Set_Unbounded_String
(Attachment.Contents.Payload.Text, Str.all);
when Encoding_8bit =>
Add_Header
(Attachment, Create (Content_Transfer_Encoding, "8bit"));
Set_Unbounded_String
(Attachment.Contents.Payload.Text, Str.all);
when Encoding_Binary =>
Add_Header
(Attachment, Create (Content_Transfer_Encoding, "binary"));
Set_Unbounded_String
(Attachment.Contents.Payload.Text, Str.all);
end case;
end;
Free (Str);
Append (Msg.Contents.Payload.Parts, Attachment);
end Attach;
---------------------
-- Get_Param_Index --
---------------------
procedure Get_Param_Index
(H : Header'Class;
Param_Name : String;
C : out Charset_String_List.Cursor;
Semicolon : out Integer;
Name_Start : out Integer;
Name_End : out Integer;
Value_End : out Integer) is
begin
C := First (H.Contents.Value);
Semicolon := 0; -- Initialize variables to avoid GNAT warnings
Name_Start := 0;
Name_End := 0;
Value_End := 0;
while Has_Element (C) loop
declare
Str : constant String := To_String (Element (C).Contents);
Index : Natural := Str'First;
Stop : Natural;
Val_Stop : Natural;
begin
while Index <= Str'Last loop
-- Look for next occurrence of ';', but not within a quoted
-- string, for instance a filename in Content-Disposition.
Index := Next_Occurrence
(Str (Index .. Str'Last), ';', Skip_Quotes => True);
if Index <= Str'Last then
Semicolon := Index;
Index := Index + 1;
Skip_Whitespaces (Str, Index);
Stop := Next_Occurrence
(Str (Index + 1 .. Str'Last), '=', Skip_Quotes => True);
if Stop < Str'Last then
Val_Stop := Next_Occurrence
(Str (Stop + 1 .. Str'Last), ';', Skip_Quotes => True);
if To_Lower
(Str (Index .. Stop - 1)) = To_Lower (Param_Name)
then
Name_Start := Index;
Name_End := Stop - 1;
Value_End := Val_Stop - 1;
return;
end if;
Index := Val_Stop;
else
Index := Stop;
end if;
end if;
end loop;
end;
Next (C);
end loop;
end Get_Param_Index;
---------------
-- Set_Param --
---------------
procedure Set_Param
(H : in out Header'Class; Param_Name : String; Param_Value : String)
is
C : Charset_String_List.Cursor := First (H.Contents.Value);
Semicolon, Name_Start, Name_End, Val_End : Integer;
Str : constant String := "; " & Param_Name & "=""" & Param_Value & '"';
begin
Get_Param_Index
(H, Param_Name, C, Semicolon, Name_Start, Name_End, Val_End);
if Has_Element (C) then
Replace_Element
(H.Contents.Value,
C,
(Contents =>
Unbounded_Slice (Element (C).Contents, 1, Semicolon - 1)
& Str
& Unbounded_Slice
(Element (C).Contents,
Val_End + 1, Length (Element (C).Contents)),
Charset => Element (C).Charset));
else
Append
(H.Contents.Value,
(Contents => To_Unbounded_String (Str),
Charset => To_Unbounded_String (Charset_US_ASCII)));
end if;
end Set_Param;
---------------
-- Get_Param --
---------------
function Get_Param (H : Header'Class; Param_Name : String) return String is
C : Charset_String_List.Cursor;
Semicolon, Name_Start, Name_End, Val_End : Integer;
function Get_Val return String;
-- Return the value, omitting surrounding quotes if any
function Get_Val return String is
Str : constant String :=
Slice (Element (C).Contents, Name_End + 2, Val_End);
begin
if Str (Str'First) = '"' then
return Str (Str'First + 1 .. Str'Last - 1);
else
return Str;
end if;
end Get_Val;
begin
if H.Contents /= null then
C := First (H.Contents.Value);
Get_Param_Index
(H, Param_Name, C, Semicolon, Name_Start, Name_End, Val_End);
if Has_Element (C) then
return Get_Val;
else
-- Support for continuation headers
-- http://greenbytes.de/tech/webdav/rfc2231.html#rfc.section.3
-- where a header can be split onto several lines
declare
Current : Natural := 0;
Val : Unbounded_String;
begin
loop
Get_Param_Index
(H, Param_Name & "*" & Image (Current, Min_Width => 1),
C, Semicolon, Name_Start, Name_End,
Val_End);
exit when not Has_Element (C);
Append (Val, Get_Val);
Current := Current + 1;
end loop;
return To_String (Val);
end;
end if;
end if;
return "";
end Get_Param;
------------------
-- Delete_Param --
------------------
procedure Delete_Param (H : in out Header'Class; Param_Name : String) is
C : Charset_String_List.Cursor := First (H.Contents.Value);
Semicolon, Name_Start, Name_End, Val_End : Integer;
begin
Get_Param_Index
(H, Param_Name, C, Semicolon, Name_Start, Name_End, Val_End);
if Has_Element (C) then
Replace_Element
(H.Contents.Value,
C,
(Contents =>
Unbounded_Slice (Element (C).Contents, 1, Semicolon - 1)
& Unbounded_Slice
(Element (C).Contents,
Val_End + 1, Length (Element (C).Contents)),
Charset => Element (C).Charset));
end if;
end Delete_Param;
------------------
-- Get_Boundary --
------------------
function Get_Boundary (Msg : Message'Class) return String is
Content_T : constant Header := Get_Header (Msg, Content_Type);
begin
if Content_T = Null_Header then
return "";
end if;
return Get_Param (Content_T, "boundary");
end Get_Boundary;
-----------------------
-- Get_Encoding_Type --
-----------------------
function Get_Encoding_Type (Msg : Message'Class) return Encoding_Type is
H : constant Header := Get_Header (Msg, Content_Transfer_Encoding);
HU : Unbounded_String;
begin
if H /= Null_Header then
Flatten (H.Contents.Value, Result => HU);
declare
use Ada.Strings;
HS : constant String := To_Lower (Trim (To_String (HU), Both));
begin
for J in Encoding_Names'Range loop
if HS = Encoding_Names (J).all then
return J;
end if;
end loop;
end;
end if;
return Encoding_7bit;
end Get_Encoding_Type;
----------------------------
-- Has_Line_Starting_With --
----------------------------
function Has_Line_Starting_With
(Text : Unbounded_String; Starts_With : String) return Boolean
is
StrA : constant String := To_String (Text);
Index : Natural;
Eol : Natural;
begin
Index := StrA'First;
while Index <= StrA'Last loop
Eol := Next_Occurrence (StrA (Index .. StrA'Last), ASCII.LF);
if Index + Starts_With'Length - 1 <= StrA'Last
and then StrA (Index .. Index + Starts_With'Length - 1) =
Starts_With
then
return True;
end if;
Index := Eol + 1;
end loop;
return False;
end Has_Line_Starting_With;
--------------------
-- Check_Boundary --
--------------------
function Check_Boundary
(Msg : Message'Class; Boundary : String) return Boolean
is
Iter : Payload_Iterator;
Msg2 : Message;
Bound : constant String := "--" & Boundary;
begin
if Is_Multipart (Msg) then
if Has_Line_Starting_With (Msg.Contents.Payload.Preamble, Bound)
or else Has_Line_Starting_With
(Msg.Contents.Payload.Epilogue, Bound)
then
return False;
end if;
Iter := Get_Payload (Msg);
loop
Next (Iter, Item => Msg2);
exit when Msg2 = Null_Message;
case Get_Encoding_Type (Msg2) is
when Encoding_QP | Encoding_Base64 =>
-- No check needs to be done, since the boundary always
-- includes the =_ sequence which cannot occur in such
-- contexts
null;
when others =>
if not Check_Boundary (Msg2, Boundary) then
return False;
end if;
end case;
end loop;
else
if Has_Line_Starting_With (Msg.Contents.Payload.Text, Bound) then
return False;
end if;
end if;
return True;
end Check_Boundary;
------------------
-- Set_Boundary --
------------------
procedure Set_Boundary (Msg : Message'Class; Boundary : String := "") is
Candidate : Unbounded_String;
Valid : Boolean := False;
Content_T : Header;
begin
Convert_To_Multipart (Msg);
Content_T := Get_Header (Msg, Content_Type);
if Boundary = "" then
-- Try to reuse the current boundary, if any
Candidate := To_Unbounded_String (Get_Boundary (Msg));
if Candidate = "" then
-- Else default on an unlikely one
-- Should generate a unique string???
Candidate := To_Unbounded_String ("=_=_=____=_=_");
end if;
else
-- Try and use the user's proposal
Candidate := To_Unbounded_String (Boundary);
if Index (Candidate, "=_") = 0 then
-- Add this string so that we never have to check quoted-printable
-- or base64 content
Append (Candidate, "=_");
end if;
end if;
while not Valid loop
Valid := Check_Boundary (Msg, To_String (Candidate));
if not Valid then
Append (Candidate, "=_");
end if;
end loop;
if Content_T = Null_Header then
Content_T := Create (Content_Type, Multipart_Mixed);
end if;
Set_Param (Content_T, "boundary", To_String (Candidate));
Replace_Header (Msg, Content_T);
end Set_Boundary;
------------
-- Adjust --
------------
procedure Adjust (H : in out Header) is
begin
if H.Contents /= null then
H.Contents.Ref_Count := H.Contents.Ref_Count + 1;
end if;
end Adjust;
--------------
-- Finalize --
--------------
procedure Finalize (H : in out Header) is
procedure Unchecked_Free is new Ada.Unchecked_Deallocation
(Header_Record, Header_Access);
begin
if H.Contents /= null then
H.Contents.Ref_Count := H.Contents.Ref_Count - 1;
if H.Contents.Ref_Count = 0 then
Unchecked_Free (H.Contents);
end if;
end if;
end Finalize;
--------------------
-- Get_Message_Id --
--------------------
function Get_Message_Id (Msg : Message) return String is
use Ada.Strings;
H : constant Header := Get_Header (Msg, "Message-ID");
MsgId_Str : constant String :=
(if H = Null_Header
then ""
else Trim (To_String (H, Show_Header_Name => False), Both));
Index : Integer;
begin
-- Note that we remove leading and trailing spaces, so that a Message-Id
-- that consists only of spaces will be treated as missing.
-- Lotus Notes is known to generate such bogus message IDs.
Index := Next_Occurrence (MsgId_Str, '<');
if Index > MsgId_Str'Last then
return MsgId_Str;
else
return MsgId_Str (Index + 1 ..
Next_Occurrence
(MsgId_Str (Index .. MsgId_Str'Last), '>') - 1);
end if;
end Get_Message_Id;
--------------
-- Get_Date --
--------------
function Get_Date (Msg : Message) return Ada.Calendar.Time is
H : constant Header := Get_Header (Msg, "Date");
begin
if H /= Null_Header then
return To_Time (H);
else
return Date_From_Envelope (Msg);
end if;
end Get_Date;
procedure Debug_Message (Msg : Message);
pragma Export (Ada, Debug_Message);
-- Display Msg on standard output (for debugging purposes)
-------------------
-- Debug_Message --
-------------------
procedure Debug_Message (Msg : Message) is
Res : Unbounded_String;
begin
To_String
(Msg,
True,
Default_Max_Header_Line_Length,
Default_Max_Header_Line_Length,
null,
null,
False,
True,
Res);
Put_Line (To_String (Res));
end Debug_Message;
end GNATCOLL.Email;
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