/usr/share/ada/adainclude/aws/aws-attachments.adb is in libaws3.3.2.2-dev 17.2.2017-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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-- Ada Web Server --
-- --
-- Copyright (C) 2004-2015, 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 --
-- MERCHANTABILITY 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.Directories;
with Ada.IO_Exceptions;
with Ada.Streams.Stream_IO;
with AWS.Headers.Values;
with AWS.Messages;
with AWS.Net.Buffered;
with AWS.Translator;
with AWS.Utils;
package body AWS.Attachments is
use Ada.Streams;
function "+"
(V : String) return Unbounded_String renames To_Unbounded_String;
UID : Utils.Counter (0);
-- Unique Id used for generating the MIME boundaries
---------
-- Add --
---------
procedure Add
(Attachments : in out List;
Filename : String;
Content_Id : String;
Headers : AWS.Headers.List := AWS.Headers.Empty_List;
Name : String := "";
Encode : Encoding := None)
is
use type Attachment_Table.Vector;
Data : constant Content := File
(Filename, Encode, Content_Id, MIME.Content_Type (Filename));
begin
if Name = "" then
Add (Attachments, Filename, Data, Headers);
else
Add (Attachments, Name, Data, Headers);
end if;
end Add;
procedure Add
(Attachments : in out List;
Filename : String;
Headers : AWS.Headers.List;
Name : String := "";
Encode : Encoding := None)
is
Data : constant Content := File
(Filename, Encode, "", MIME.Content_Type (Filename));
begin
if Name = "" then
Add (Attachments, Filename, Data, Headers);
else
Add (Attachments, Name, Data, Headers);
end if;
end Add;
procedure Add
(Attachments : in out List;
Name : String;
Data : Content;
Headers : AWS.Headers.List := AWS.Headers.Empty_List)
is
Has_Content_Type : constant Boolean :=
Headers.Exist (AWS.Messages.Content_Type_Token);
Has_Content_TE : constant Boolean :=
Headers.Exist
(AWS.Messages.Content_Transfer_Encoding_Token);
A : Element :=
(AWS.Attachments.Data, Headers,
Data.Length + AWS.Headers.Length (Headers), Data);
begin
if Data.Filename = Null_Unbounded_String then
if Data.Content_Type /= Null_Unbounded_String then
A.Headers.Update
(Name => AWS.Messages.Content_Type_Token,
Value => To_String (Data.Content_Type));
end if;
else
A.Headers.Add
(Name => AWS.Messages.Content_Disposition_Token,
Value => "attachment; filename=""" & Name & '"');
if Data.Content_Type = Null_Unbounded_String then
if not Has_Content_Type then
-- Content_Type is not in A.Headers nor defined with Data,
-- create one based on the file name.
A.Headers.Add
(Name => AWS.Messages.Content_Type_Token,
Value => MIME.Content_Type (Name) & "; name="""
& Name & '"');
end if;
else
A.Headers.Update
(Name => AWS.Messages.Content_Type_Token,
Value => To_String (Data.Content_Type) & "; name="""
& Name & '"');
end if;
if Data.Encode = None and then not Has_Content_TE then
if MIME.Is_Text (MIME.Content_Type (Name)) then
A.Headers.Add
(Name => AWS.Messages.Content_Transfer_Encoding_Token,
Value => "8bit");
else
A.Headers.Add
(Name => AWS.Messages.Content_Transfer_Encoding_Token,
Value => "binary");
end if;
end if;
end if;
if Data.Encode = Base64 then
A.Headers.Update
(Name => AWS.Messages.Content_Transfer_Encoding_Token,
Value => "base64");
end if;
if Data.Content_Id /= Null_Unbounded_String then
A.Headers.Add
(Name => AWS.Messages.Content_Id_Token,
Value => '<' & To_String (Data.Content_Id) & '>');
end if;
Attachments.Vector.Append (A);
end Add;
procedure Add
(Parts : in out Alternatives;
Data : Content) is
begin
Parts.Parts.Append (Data);
end Add;
procedure Add
(Attachments : in out List;
Parts : Alternatives) is
begin
Attachments.Vector.Append (Element (Parts));
end Add;
----------------
-- Content_Id --
----------------
function Content_Id (Attachment : Element) return String is
begin
return AWS.Headers.Get (Attachment.Headers, Messages.Content_Id_Token);
end Content_Id;
------------------
-- Content_Type --
------------------
function Content_Type (Attachment : Element) return String is
begin
return AWS.Headers.Values.Get_Unnamed_Value
(AWS.Headers.Get (Attachment.Headers, Messages.Content_Type_Token));
end Content_Type;
-----------
-- Count --
-----------
function Count (Attachments : List) return Natural is
begin
return Natural (Attachment_Table.Length (Attachments.Vector));
end Count;
----------
-- File --
----------
function File
(Filename : String;
Encode : Encoding := None;
Content_Id : String := "";
Content_Type : String := MIME.Text_Plain) return Content is
begin
return Content'(File, Natural (Utils.File_Size (Filename)),
Content_Id => +Content_Id,
Content_Type => +Content_Type,
Filename => +Filename,
Encode => Encode);
end File;
--------------
-- Filename --
--------------
function Filename (Attachment : Element) return String is
Result : Unbounded_String;
begin
if AWS.Headers.Exist
(Attachment.Headers, Messages.Content_Disposition_Token)
then
Result :=
+(AWS.Headers.Values.Search
(AWS.Headers.Get
(Attachment.Headers, Messages.Content_Disposition_Token),
"filename"));
end if;
if Result = Null_Unbounded_String
and then
AWS.Headers.Exist
(Attachment.Headers, Messages.Content_Type_Token)
then
Result :=
+(AWS.Headers.Values.Search
(AWS.Headers.Get
(Attachment.Headers, Messages.Content_Type_Token),
"name"));
end if;
return To_String (Result);
end Filename;
--------------------------
-- For_Every_Attachment --
--------------------------
procedure For_Every_Attachment (Attachments : List) is
Quit : Boolean := False;
begin
for J in 1 .. Count (Attachments) loop
Action (Get (Attachments, J), J, Quit);
exit when Quit;
end loop;
end For_Every_Attachment;
---------
-- Get --
---------
function Get
(Attachments : List;
Index : Positive) return Element is
begin
return Attachment_Table.Element
(Container => Attachments.Vector, Index => Index);
end Get;
---------
-- Get --
---------
function Get
(Attachments : List;
Content_Id : String) return Element
is
function Get_CID (Content_Id : String) return String;
-- Returns Content_Id stripped from possibly surrounding
-- '<' '>' and prefixing "cid:".
-------------
-- Get_CID --
-------------
function Get_CID (Content_Id : String) return String is
begin
if Content_Id (Content_Id'First) = '<'
and then Content_Id (Content_Id'Last) = '>'
then
return Get_CID
(Content_Id (Content_Id'First + 1 .. Content_Id'Last - 1));
elsif Content_Id'Length > 4
and then
Content_Id (Content_Id'First .. Content_Id'First + 3) = "cid:"
then
return Content_Id (Content_Id'First + 4 .. Content_Id'Last);
else
return Content_Id;
end if;
end Get_CID;
CID : constant String := Get_CID (Content_Id);
Attachment : Element;
begin
for J in 1 .. Count (Attachments) loop
Attachment := Get (Attachments, J);
if AWS.Attachments.Content_Id (Attachment) = CID
or else AWS.Attachments.Content_Id (Attachment) = '<' & CID & '>'
then
return Attachment;
end if;
end loop;
-- No Content ID matched the request
raise Constraint_Error;
end Get;
-------------
-- Headers --
-------------
function Headers (Attachment : Element) return AWS.Headers.List is
begin
return Attachment.Headers;
end Headers;
-------------
-- Iterate --
-------------
procedure Iterate
(Attachments : List;
Process : not null access procedure (Attachment : Element)) is
begin
for Position in Attachments.Vector.Iterate loop
Attachment_Table.Query_Element (Position, Process);
end loop;
end Iterate;
----------
-- Kind --
----------
function Kind (Attachment : Element) return Attachment_Kind is
begin
return Attachment.Kind;
end Kind;
------------
-- Length --
------------
function Length
(Attachments : List;
Boundary : String) return Positive
is
L : Positive;
begin
-- The length of all start boundaries, and the 2 characters longer
-- end boundary.
L := (Boundary'Length + 6) * (Count (Attachments) + 1) + 2;
-- Add all content lengths
for J in 1 .. Count (Attachments) loop
L := L + Element (Element'(Get (Attachments, J))).Total_Length;
end loop;
return L;
end Length;
--------------------
-- Local_Filename --
--------------------
function Local_Filename (Attachment : Element) return String is
begin
return To_String (Attachment.Data.Filename);
end Local_Filename;
-----------
-- Reset --
-----------
procedure Reset
(Attachments : in out List;
Delete_Files : Boolean) is
begin
if Delete_Files then
for J in 1 .. Count (Attachments) loop
begin
Directories.Delete_File
(Name => Local_Filename (Element'(Get (Attachments, J))));
exception
when IO_Exceptions.Name_Error | IO_Exceptions.Use_Error =>
null;
end;
end loop;
end if;
Attachment_Table.Clear (Attachments.Vector);
end Reset;
---------------
-- Root_MIME --
---------------
function Root_MIME (Attachments : List) return Root_MIME_Kind is
begin
if Count (Attachments) = 1
and then Kind (Element'(Get (Attachments, 1))) = Alternative
then
return Multipart_Alternative;
else
return Multipart_Mixed;
end if;
end Root_MIME;
----------
-- Send --
----------
procedure Send
(Socket : AWS.Net.Socket_Type'Class;
Attachments : List;
Boundary : String)
is
procedure Send_Attachment (Attachment : Element);
-- Sends one Attachment, including the start boundary
procedure Send_Content (Attachment : Element);
-- Set an in-memory content
procedure Send_Content (Data : Content);
procedure Send_Alternative (Attachment : Element);
-- Send an alternative part
Pref_Suf : constant String := "--";
-- The MIME boundary prefix and suffix
Simple_Alternative : constant Boolean :=
Root_MIME (Attachments) = Multipart_Alternative;
----------------------
-- Send_Alternative --
----------------------
procedure Send_Alternative (Attachment : Element) is
A_Boundary : Unbounded_String;
begin
if not Simple_Alternative then
-- This is not the first element, we issue an embedded MIME
-- content.
Net.Buffered.Put_Line (Socket, Pref_Suf & Boundary);
Send_MIME_Header
(Socket, Attachments,
Alternative => True,
Boundary => A_Boundary);
else
A_Boundary := To_Unbounded_String (Boundary);
end if;
-- Send alternatives
for Part of Attachment.Parts loop
Net.Buffered.Put_Line (Socket, Pref_Suf & To_String (A_Boundary));
Net.Buffered.Put_Line
(Socket, Messages.Content_Type (To_String (Part.Content_Type)));
Net.Buffered.New_Line (Socket);
Send_Content (Part);
end loop;
if not Simple_Alternative then
-- Ends the alternative part
Net.Buffered.New_Line (Socket);
Net.Buffered.Put_Line
(Socket, Pref_Suf & To_String (A_Boundary) & Pref_Suf);
end if;
end Send_Alternative;
---------------------
-- Send_Attachment --
---------------------
procedure Send_Attachment (Attachment : Element) is
begin
case Attachment.Kind is
when Data => Send_Content (Attachment);
when Alternative => Send_Alternative (Attachment);
end case;
end Send_Attachment;
------------------
-- Send_Content --
------------------
procedure Send_Content (Attachment : Element) is
begin
-- Send multipart message start boundary
Net.Buffered.Put_Line (Socket, Pref_Suf & Boundary);
-- Send header
AWS.Headers.Send_Header (Socket, Attachment.Headers);
Net.Buffered.New_Line (Socket);
Send_Content (Attachment.Data);
end Send_Content;
procedure Send_Content (Data : Content) is
procedure Send_File;
procedure Send_Content;
------------------
-- Send_Content --
------------------
procedure Send_Content is
procedure Send;
-- Send standard content
procedure Send_Base64;
-- Send a base64 content
----------
-- Send --
----------
procedure Send is
begin
Net.Buffered.Put_Line (Socket, To_String (Data.Content));
end Send;
-----------------
-- Send_Base64 --
-----------------
procedure Send_Base64 is
Chunk_Size : constant := 60;
Content_Len : constant Positive := Length (Data.Content);
K : Positive := 1;
begin
while K <= Content_Len loop
if K + Chunk_Size - 1 > Content_Len then
Net.Buffered.Put_Line
(Socket,
Slice (Data.Content, K, Content_Len));
K := Content_Len + 1;
else
Net.Buffered.Put_Line
(Socket,
Slice (Data.Content, K, K + Chunk_Size - 1));
K := K + Chunk_Size;
end if;
end loop;
end Send_Base64;
begin
case Data.Encode is
when None => Send;
when Base64 => Send_Base64;
end case;
end Send_Content;
---------------
-- Send_File --
---------------
procedure Send_File is
procedure Send;
-- Send file as-is
procedure Send_Base64;
-- Send file encoded in Base64
File : Streams.Stream_IO.File_Type;
----------
-- Send --
----------
procedure Send is
Buffer : Streams.Stream_Element_Array (1 .. 4_096);
Last : Streams.Stream_Element_Offset;
begin
-- Send file content
while not Streams.Stream_IO.End_Of_File (File) loop
Streams.Stream_IO.Read (File, Buffer, Last);
Net.Buffered.Write (Socket, Buffer (1 .. Last));
end loop;
Net.Buffered.New_Line (Socket);
exception
when Net.Socket_Error =>
-- Properly close the file if needed
if Streams.Stream_IO.Is_Open (File) then
Streams.Stream_IO.Close (File);
end if;
raise;
end Send;
-----------------
-- Send_Base64 --
-----------------
procedure Send_Base64 is
Buffer_Size : constant := 60;
-- Note that this size must be a multiple of 3, this is
-- important to have proper chunk MIME encoding.
Buffer : Streams.Stream_Element_Array (1 .. Buffer_Size);
Last : Streams.Stream_Element_Offset;
begin
while not Streams.Stream_IO.End_Of_File (File) loop
Streams.Stream_IO.Read (File, Buffer, Last);
Net.Buffered.Put_Line
(Socket,
AWS.Translator.Base64_Encode (Buffer (1 .. Last)));
end loop;
end Send_Base64;
begin
Stream_IO.Open
(File, Streams.Stream_IO.In_File, To_String (Data.Filename));
case Data.Encode is
when None => Send;
when Base64 => Send_Base64;
end case;
Stream_IO.Close (File);
end Send_File;
begin
case Data.Kind is
when File => Send_File;
when AWS.Attachments.Data => Send_Content;
end case;
end Send_Content;
begin
-- Send the attachments
for J in 1 .. Integer (Attachments.Vector.Length) loop
Send_Attachment
(Attachment_Table.Element
(Container => Attachments.Vector,
Index => J));
end loop;
-- Send multipart message end boundary
Net.Buffered.Put_Line (Socket, Pref_Suf & Boundary & Pref_Suf);
end Send;
----------------------
-- Send_MIME_Header --
----------------------
procedure Send_MIME_Header
(Socket : Net.Socket_Type'Class;
Attachments : List;
Boundary : out Unbounded_String;
Alternative : Boolean := False)
is
L_Boundary : constant String :=
"----=_NextPart_" & Utils.Random_String (10) & "."
& Utils.Image (UID.Value);
begin
UID.Increment;
Boundary := To_Unbounded_String (L_Boundary);
if Alternative
or else Root_MIME (Attachments) = Multipart_Alternative
then
Net.Buffered.Put_Line
(Socket,
Messages.Content_Type ("multipart/alternative", L_Boundary));
else
Net.Buffered.Put_Line
(Socket,
Messages.Content_Type ("multipart/mixed", L_Boundary));
end if;
Net.Buffered.New_Line (Socket);
end Send_MIME_Header;
----------
-- Data --
----------
function Value
(Data : String;
Name : String := "";
Encode : Encoding := None;
Content_Id : String := "";
Content_Type : String := MIME.Text_Plain) return Content
is
CD : Unbounded_String;
begin
if Encode = Base64 then
CD := +Translator.Base64_Encode (Data);
else
CD := +Data;
end if;
return Content'(Attachments.Data, Data'Length,
Content_Id => +Content_Id,
Content_Type => +Content_Type,
Filename => +Name,
Encode => Encode,
Content => CD);
end Value;
end AWS.Attachments;
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