mirror of
https://github.com/moparisthebest/Simba
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264 lines
8.9 KiB
ObjectPascal
264 lines
8.9 KiB
ObjectPascal
{==============================================================================|
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| Project : Ararat Synapse | 001.001.011 |
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|==============================================================================|
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| Content: Inline MIME support procedures and functions |
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|==============================================================================|
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| Copyright (c)1999-2006, Lukas Gebauer |
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| All rights reserved. |
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| Redistribution and use in source and binary forms, with or without |
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| modification, are permitted provided that the following conditions are met: |
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| Redistributions of source code must retain the above copyright notice, this |
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| list of conditions and the following disclaimer. |
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| Redistributions in binary form must reproduce the above copyright notice, |
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| this list of conditions and the following disclaimer in the documentation |
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| and/or other materials provided with the distribution. |
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| |
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| Neither the name of Lukas Gebauer nor the names of its contributors may |
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| be used to endorse or promote products derived from this software without |
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| specific prior written permission. |
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| THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
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| AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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| IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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| ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR |
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| ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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| DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
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| SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER |
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| CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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| LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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| OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH |
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| DAMAGE. |
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|==============================================================================|
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| The Initial Developer of the Original Code is Lukas Gebauer (Czech Republic).|
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| Portions created by Lukas Gebauer are Copyright (c)2000-2006. |
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| All Rights Reserved. |
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|==============================================================================|
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| Contributor(s): |
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|==============================================================================|
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| History: see HISTORY.HTM from distribution package |
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| (Found at URL: http://www.ararat.cz/synapse/) |
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|==============================================================================}
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{:@abstract(Utilities for inline MIME)
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Support for Inline MIME encoding and decoding.
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Used RFC: RFC-2047, RFC-2231
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}
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{$IFDEF FPC}
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{$MODE DELPHI}
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{$ENDIF}
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{$H+}
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{$IFDEF UNICODE}
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{$WARN IMPLICIT_STRING_CAST OFF}
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{$WARN IMPLICIT_STRING_CAST_LOSS OFF}
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{$ENDIF}
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unit mimeinln;
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interface
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uses
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SysUtils, Classes,
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synachar, synacode, synautil;
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{:Decodes mime inline encoding (i.e. in headers) uses target characterset "CP".}
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function InlineDecode(const Value: string; CP: TMimeChar): string;
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{:Encodes string to MIME inline encoding. The source characterset is "CP", and
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the target charset is "MimeP".}
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function InlineEncode(const Value: string; CP, MimeP: TMimeChar): string;
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{:Returns @true, if "Value" contains characters needed for inline coding.}
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function NeedInline(const Value: AnsiString): boolean;
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{:Inline mime encoding similar to @link(InlineEncode), but you can specify
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source charset, and the target characterset is automatically assigned.}
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function InlineCodeEx(const Value: string; FromCP: TMimeChar): string;
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{:Inline MIME encoding similar to @link(InlineEncode), but the source charset
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is automatically set to the system default charset, and the target charset is
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automatically assigned from set of allowed encoding for MIME.}
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function InlineCode(const Value: string): string;
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{:Converts e-mail address to canonical mime form. You can specify source charset.}
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function InlineEmailEx(const Value: string; FromCP: TMimeChar): string;
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{:Converts e-mail address to canonical mime form. Source charser it system
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default charset.}
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function InlineEmail(const Value: string): string;
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implementation
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{==============================================================================}
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function InlineDecode(const Value: string; CP: TMimeChar): string;
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var
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s, su, v: string;
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x, y, z, n: Integer;
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ichar: TMimeChar;
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c: Char;
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function SearchEndInline(const Value: string; be: Integer): Integer;
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var
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n, q: Integer;
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begin
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q := 0;
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Result := 0;
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for n := be + 2 to Length(Value) - 1 do
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if Value[n] = '?' then
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begin
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Inc(q);
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if (q > 2) and (Value[n + 1] = '=') then
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begin
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Result := n;
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Break;
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end;
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end;
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end;
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begin
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Result := '';
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v := Value;
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x := Pos('=?', v);
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y := SearchEndInline(v, x);
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//fix for broken coding with begin, but not with end.
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if (x > 0) and (y <= 0) then
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y := Length(Result);
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while (y > x) and (x > 0) do
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begin
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s := Copy(v, 1, x - 1);
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if Trim(s) <> '' then
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Result := Result + s;
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s := Copy(v, x, y - x + 2);
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Delete(v, 1, y + 1);
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su := Copy(s, 3, Length(s) - 4);
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z := Pos('?', su);
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if (Length(su) >= (z + 2)) and (su[z + 2] = '?') then
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begin
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ichar := GetCPFromID(SeparateLeft(Copy(su, 1, z - 1), '*'));
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c := UpperCase(su)[z + 1];
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su := Copy(su, z + 3, Length(su) - z - 2);
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if c = 'B' then
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begin
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s := DecodeBase64(su);
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s := CharsetConversion(s, ichar, CP);
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end;
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if c = 'Q' then
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begin
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s := '';
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for n := 1 to Length(su) do
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if su[n] = '_' then
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s := s + ' '
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else
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s := s + su[n];
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s := DecodeQuotedPrintable(s);
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s := CharsetConversion(s, ichar, CP);
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end;
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end;
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Result := Result + s;
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x := Pos('=?', v);
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y := SearchEndInline(v, x);
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end;
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Result := Result + v;
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end;
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{==============================================================================}
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function InlineEncode(const Value: string; CP, MimeP: TMimeChar): string;
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var
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s, s1, e: string;
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n: Integer;
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begin
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s := CharsetConversion(Value, CP, MimeP);
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s := EncodeSafeQuotedPrintable(s);
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e := GetIdFromCP(MimeP);
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s1 := '';
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Result := '';
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for n := 1 to Length(s) do
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if s[n] = ' ' then
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begin
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// s1 := s1 + '=20';
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s1 := s1 + '_';
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if Length(s1) > 32 then
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begin
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if Result <> '' then
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Result := Result + ' ';
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Result := Result + '=?' + e + '?Q?' + s1 + '?=';
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s1 := '';
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end;
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end
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else
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s1 := s1 + s[n];
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if s1 <> '' then
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begin
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if Result <> '' then
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Result := Result + ' ';
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Result := Result + '=?' + e + '?Q?' + s1 + '?=';
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end;
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end;
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{==============================================================================}
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function NeedInline(const Value: AnsiString): boolean;
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var
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n: Integer;
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begin
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Result := False;
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for n := 1 to Length(Value) do
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if Value[n] in (SpecialChar + NonAsciiChar - ['_']) then
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begin
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Result := True;
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Break;
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end;
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end;
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{==============================================================================}
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function InlineCodeEx(const Value: string; FromCP: TMimeChar): string;
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var
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c: TMimeChar;
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begin
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if NeedInline(Value) then
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begin
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c := IdealCharsetCoding(Value, FromCP, IdealCharsets);
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Result := InlineEncode(Value, FromCP, c);
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end
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else
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Result := Value;
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end;
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{==============================================================================}
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function InlineCode(const Value: string): string;
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begin
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Result := InlineCodeEx(Value, GetCurCP);
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end;
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{==============================================================================}
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function InlineEmailEx(const Value: string; FromCP: TMimeChar): string;
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var
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sd, se: string;
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begin
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sd := GetEmailDesc(Value);
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se := GetEmailAddr(Value);
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if sd = '' then
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Result := se
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else
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Result := '"' + InlineCodeEx(sd, FromCP) + '" <' + se + '>';
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end;
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{==============================================================================}
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function InlineEmail(const Value: string): string;
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begin
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Result := InlineEmailEx(Value, GetCurCP);
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end;
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end.
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