411 REFERENCE · Wikibooks
Oberon/A2/Oberon.MIME.Mod
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(* ETH Oberon, Copyright 2001 ETH Zuerich Institut fuer Computersysteme, ETH Zentrum, CH-8092 Zuerich.
Refer to the "General ETH Oberon System Source License" contract available at: http://www.oberon.ethz.ch/ *)
MODULE MIME IN Oberon; (** portable *)
IMPORT Streams, TextStreams, Files, Dates, Strings, Fonts, Texts, Display, Display3,
Objects, Attributes, Gadgets, BasicFigures, Out, Oberon;
CONST
BufLen = 1024;
MaxLine = BufLen-1;
MaxSMTPLine = 1000;
MimeVersion* = "Mime-Version: 1.0";
TextMime* = "text/plain"; ISOVer* = "ISO-8859-1";
OberonMime* = "application/compressed/oberon";
EncAuto* = -1; EncBin* = 0; Enc8Bit* = 1; Enc7Bit* = 2; EncQuoted* = 3; EncBase64* = 4; EncAsciiCoder* = 5;
EncAsciiCoderC* = 6; EncAsciiCoderCPlain* = 7;
ContEncQuoted* = "Content-Transfer-Encoding: quoted-printable"; (* EncQuoted *)
ContEnc7Bit* = "Content-Transfer-Encoding: 7bit"; (* Enc7Bit *)
ContEnc8Bit* = "Content-Transfer-Encoding: 8bit"; (* EncBin, Enc8Bit*)
ContEncBase64* = "Content-Transfer-Encoding: Base64"; (* EncBase64 *)
TYPE
OpenString* = POINTER TO ARRAY OF CHAR;
Header* = POINTER TO HeaderDesc;
HeaderDesc* = RECORD
fields*: OpenString
END;
(** A list of the mime content-types supported.
The mime-types supported by Oberon are described in the "MIME" section of oberon.ini.
The syntax of a mime entry is:
mimedef = mime "=" [ suffix [ prefix ] ] .
mime The mime type, e.g: "text/html", "image/gif", ...
suffix Suffix to be used for temporary files.
prefix Prefix to be used for temporary files .
e.g. "c:/temp/" writes the temporary files in the c:/temp directory *)
ContentType* = POINTER TO ContentTypeDesc;
ContentTypeDesc* = RECORD
typ*: ARRAY 32 OF CHAR;
subTyp*: ARRAY 64 OF CHAR;
suffix*: ARRAY 8 OF CHAR;
prefix*: ARRAY 128 OF CHAR;
support*: BOOLEAN;
next: ContentType
END;
Content* = POINTER TO ContentDesc;
ContentDesc* = RECORD
h: Header;
pos, len*: LONGINT;
typ*: ContentType;
encoding*: LONGINT (* 0: binary; 1: 8 bit; 2: 7 bit; 3: 7 bit, quoted; 4: Base64; 5: AsciiCoder; 6: AsciiCoder % *)
END;
Part = POINTER TO PartDesc;
PartDesc = RECORD
name: ARRAY 64 OF CHAR;
no: LONGINT;
next: Part
END;
VAR
contTypes*: ContentType; (** Root of the content-typ list. *)
textCont*: Content;
PROCEDURE ReadHeader*(S, echo: Streams.Stream; VAR h: Header; VAR len: LONGINT);
VAR
buf: OpenString;
bufLen, bufPos, begPos, begLen: LONGINT;
ch, eolc: CHAR;
end, eol, field, anyField, white: BOOLEAN;
PROCEDURE Read;
BEGIN
IF (ch # Strings.LF) & (echo # NIL) THEN
TextStreams.Write(echo, ch)
END;
Streams.Read(S, ch); INC(len)
END Read;
BEGIN
len := 0; begLen := 0; anyField := FALSE;
NEW(h); bufLen := 1024; NEW(h.fields, bufLen); bufPos := 0;
ch := Strings.LF; Read(); eol := FALSE;
REPEAT
end := TRUE; field := FALSE; white := FALSE; begPos := bufPos;
WHILE ~S.eos & ~eol DO
IF bufPos >= (bufLen-3) THEN
h.fields[bufPos] := 0X;
INC(bufLen, 1024); NEW(buf, bufLen);
COPY(h.fields^, buf^); h.fields := buf
END;
IF ((ch = ":") OR (ch = "+")) & ~field THEN (* "+OK xxx octets" workaround *)
end := FALSE; field := ~white; anyField := anyField OR field
ELSIF ch <= " " THEN
ch := " "; white := TRUE
END;
h.fields[bufPos] := ch; INC(bufPos);
Read();
IF (ch = Strings.CR) OR (ch = Strings.LF) THEN
eolc := ch; Read();
IF eolc # Strings.LF THEN
IF ch # Strings.LF THEN
eolc := Strings.CR
ELSE
Read(); eolc := Strings.LF
END
END;
IF ch > " " THEN
eol := TRUE
ELSE
WHILE ~S.eos & (ch <= " ") & (ch # eolc) DO
Read()
END;
eol := ch = eolc;
IF ~eol THEN
h.fields[bufPos] := " "; INC(bufPos)
END
END
ELSE
eol := FALSE
END
END;
end := end OR (bufPos <= begPos) OR (ch = Strings.CR) OR (ch = Strings.LF);
IF field THEN
begLen := len-1;
IF S.eos & ~((ch = Strings.CR) OR (ch = Strings.LF)) THEN
INC(begLen)
ELSIF ~S.eos THEN
DEC(begLen)
END
END;
h.fields[bufPos] := 0X; field := FALSE; INC(bufPos);
eol := FALSE
UNTIL end;
len := begLen; h.fields[bufPos] := 0X;
IF ~anyField THEN
h.fields[0] := 0X; h.fields[1] := 0X
END
END ReadHeader;
PROCEDURE FindFieldPos*(h: Header; field: ARRAY OF CHAR; VAR pos: LONGINT);
VAR len, i: LONGINT;
BEGIN
len := LEN(h.fields^);
WHILE pos < len DO
i := 0;
WHILE (pos < len) & (CAP(field[i]) = CAP(h.fields[pos])) & (field[i] # 0X) DO
INC(i); INC(pos)
END;
IF (field[i] = 0X) & ((h.fields[pos] <= " ") OR (h.fields[pos] = ":")) THEN
WHILE (pos < len) & (h.fields[pos] # ":") & (h.fields[pos] # 0X) DO
INC(pos)
END;
IF h.fields[pos] = ":" THEN
INC(pos);
WHILE (pos < len) & (h.fields[pos] <= " ") & (h.fields[pos] # 0X) DO
INC(pos)
END
END;
RETURN
ELSE
WHILE (pos < len) & (h.fields[pos] # 0X) DO
INC(pos)
END
END;
INC(pos)
END;
pos := -1
END FindFieldPos;
PROCEDURE FindField*(h: Header; field: ARRAY OF CHAR): LONGINT;
VAR pos: LONGINT;
BEGIN
pos := 0; FindFieldPos(h, field, pos);
RETURN pos
END FindField;
PROCEDURE NextValue*(h: Header; VAR pos: LONGINT);
VAR len: LONGINT;
BEGIN
len := LEN(h.fields^);
IF (pos < 0) OR (pos >= len) THEN
RETURN
END;
WHILE (pos < len) & (h.fields[pos] # 0X) & (h.fields[pos] # ";") DO
INC(pos)
END;
IF h.fields[pos] = ";" THEN
INC(pos)
END;
WHILE (pos < len) & (h.fields[pos] # 0X) & (h.fields[pos] <= " ") DO
INC(pos)
END
END NextValue;
PROCEDURE HexVal(ch: CHAR): LONGINT;
BEGIN
IF (ch >= "0") & (ch <= "9") THEN
RETURN ORD(ch)-ORD("0")
ELSIF (ch >= "A") & (ch <= "F") THEN
RETURN ORD(ch)-ORD("A")+10
ELSIF (ch >= "a") & (ch <= "f") THEN
RETURN ORD(ch)-ORD("a")+10
END
END HexVal;
PROCEDURE DecodeValue(VAR value: ARRAY OF CHAR);
VAR
i, j, l: LONGINT;
quoted: BOOLEAN;
ch: CHAR;
BEGIN
quoted := FALSE;
i := 0; j := 0; l := LEN(value);
ch := value[i];
WHILE ch # 0X DO
ch := Strings.ISOToOberon[ORD(ch)];
IF ch = "=" THEN
IF ~quoted & ((i+14) < l) & (value[i+1] = "?") & (value[i+12] = "?") & (value[i+14] = "?") THEN
quoted := TRUE; INC(i, 14)
ELSIF quoted & Strings.IsHexDigit(value[i+1]) & Strings.IsHexDigit(value[i+2]) THEN
value[j] := Strings.ISOToOberon[HexVal(value[i+1])*16+HexVal(value[i+2])]; INC(j);
INC(i, 2)
ELSE
value[j] := ch; INC(j)
END
ELSIF (ch = "?") & quoted & (value[i+1] = "=") THEN
quoted := FALSE; INC(i)
ELSE
value[j] := ch; INC(j)
END;
INC(i); ch := value[i]
END;
value[j] := 0X
END DecodeValue;
PROCEDURE ExtractValue*(h: Header; pos: LONGINT; VAR val: ARRAY OF CHAR);
VAR len, i, vlen: LONGINT;
BEGIN
COPY("", val);
len := LEN(h.fields^);
IF (pos < 0) OR (pos >= len) THEN
RETURN
END;
WHILE (pos < len) & (h.fields[pos] # 0X) & (h.fields[pos] <= " ") DO
INC(pos)
END;
vlen := LEN(val)-1; i := 0;
WHILE (pos < len) & (h.fields[pos] # 0X) & (i < vlen) DO
val[i] := h.fields[pos]; INC(i); INC(pos)
END;
val[i] := 0X; DEC(i);
WHILE (i > 0) & (val[i] <= " ") DO
val[i] := 0X; DEC(i)
END;
DecodeValue(val)
END ExtractValue;
PROCEDURE FindParam*(h: Header; pos: LONGINT; param: ARRAY OF CHAR; VAR val: ARRAY OF CHAR);
VAR len, i, vlen: LONGINT;
BEGIN
COPY("", val);
len := LEN(h.fields^);
IF (pos < 0) OR (pos >= len) THEN
RETURN
END;
WHILE (pos < len) & (h.fields[pos] # 0X) & (h.fields[pos] <= " ") DO
INC(pos)
END;
vlen := LEN(val)-1;
WHILE (pos < len) & (h.fields[pos] # 0X) DO
i := 0;
WHILE (pos < len) & (param[i] # 0X) & (CAP(param[i]) = CAP(h.fields[pos])) DO
INC(i); INC(pos)
END;
IF param[i] = 0X THEN
WHILE (pos < len) & (h.fields[pos] # 0X) & (h.fields[pos] <= " ") DO
INC(pos)
END;
IF h.fields[pos] = "=" THEN
INC(pos);
WHILE (pos < len) & (h.fields[pos] # 0X) & (h.fields[pos] <= " ") DO
INC(pos)
END;
IF h.fields[pos] = 022X THEN
INC(pos)
END;
vlen := LEN(val)-1; i := 0;
WHILE (pos < len) & (h.fields[pos] # 0X) & (h.fields[pos] # 022X) & (h.fields[pos] # ";") & (i < vlen) DO
val[i] := h.fields[pos]; INC(i); INC(pos)
END;
val[i] := 0X; DEC(i);
WHILE (i > 0) & (val[i] <= " ") DO
val[i] := 0X; DEC(i)
END
END;
RETURN
END;
NextValue(h, pos)
END
END FindParam;
PROCEDURE ExtractEMail*(h: Header; pos: LONGINT; VAR email: ARRAY OF CHAR);
VAR
len, i, len2: LONGINT;
end: CHAR;
BEGIN
COPY("", email);
len := LEN(h.fields^);
IF (pos < 0) OR (pos >= len) THEN
RETURN
END;
WHILE (pos < len) & (h.fields[pos] # 0X) & (h.fields[pos] # "@") DO
INC(pos)
END;
IF h.fields[pos] = "@" THEN
WHILE (pos >= 0) & (h.fields[pos] > " ") & (h.fields[pos] # "<") DO
DEC(pos)
END;
IF h.fields[pos] <= " " THEN
INC(pos)
END;
IF h.fields[pos] = "<" THEN
INC(pos); end := ">"
ELSE
end := 0X
END;
len2 := LEN(email)-1; i := 0;
WHILE (i < len2) & (pos < len) & (h.fields[pos] > " ") & (h.fields[pos] # end) DO
email[i] := h.fields[pos]; INC(i); INC(pos)
END;
email[i] := 0X
END
END ExtractEMail;
PROCEDURE StrToMonth(VAR str: ARRAY OF CHAR): LONGINT;
BEGIN
CASE CAP(str[0]) OF
"A": IF (CAP(str[1]) = "P") OR (CAP(str[1]) = "V") THEN (* April, Aprile, Avril *)
RETURN 4
ELSE (* August, Agosto, Aout *)
RETURN 8
END
|"D": RETURN 12 (* December, Dezember, Dicembre, Decembre *)
|"F": RETURN 2 (* February, Febbbraio, Fevrier *)
|"G": IF CAP(str[1]) = "E" THEN (* Gennaiv *)
RETURN 1
ELSE (* Giugno *)
RETURN 6
END
|"J": IF CAP(str[1]) = "A" THEN (* January, Januar, Janvier *)
RETURN 1
ELSIF CAP(str[2]) = "L" THEN (* July, Juli, Juillet *)
RETURN 7
ELSE (* June, Juni, Juin *)
RETURN 6
END
|"L": RETURN 7 (* Luglio *)
|"M": IF CAP(str[2]) = "R" THEN (* March, März, Mars *)
RETURN 3
ELSIF CAP(str[2]) = "Z" THEN (* Mazzo *)
RETURN 3
ELSE (* May, Mai, Maggio *)
RETURN 5
END
|"N": RETURN 11(* November, Novembre *)
|"O": RETURN 10 (* October, Oktober, Ottobre, Octobre *)
|"S": RETURN 9 (* September, Seltombre, Septembre *)
ELSE
END;
RETURN 0
END StrToMonth;
PROCEDURE GMTTime(h, m, s: LONGINT; zone: ARRAY OF CHAR; VAR time, date: LONGINT): BOOLEAN;
VAR dH, dM, i: LONGINT;
BEGIN
IF (zone[0] = "+") OR (zone[0] = "-") THEN
IF Strings.Length(zone) > 5 THEN
dH := 0
ELSE
Strings.StrToInt(zone, dH)
END;
IF dH < 0 THEN i := -1 ELSE i := 1 END;
dM := i*ABS(dH MOD 100);
dH := i*ABS(dH DIV 100)
ELSE
dH := 0; dM := 0;
Strings.Upper(zone, zone);
IF (zone = "UT") OR (zone = "GMT") OR (zone = "AM") THEN
(* nix *)
ELSIF zone = "EST" THEN
dH := -5
ELSIF zone = "EDT" THEN
dH := -4
ELSIF zone = "CST" THEN
dH := -6
ELSIF zone = "CDT" THEN
dH := -5
ELSIF zone = "MST" THEN
dH := -7
ELSIF zone = "MDT" THEN
dH := -6
ELSIF zone = "PST" THEN
dH := -8
ELSIF zone = "PDT" THEN
dH := -7
ELSIF zone = "MET" THEN
dH := +2
ELSIF (zone[1] <= " ") & (zone[0] >= "A") & (zone[0] <= "Y") & (zone[0] # "J") THEN (* military *)
IF zone[0] >= "N" THEN
dH := ORD(zone[0])-ORD("N")+1
ELSIF zone[0] < "J" THEN
dH := -(ORD(zone[0])-ORD("A")+1)
ELSE
dH := -(ORD(zone[0])-ORD("A"))
END
ELSIF zone = "PM" THEN
dH := +12
ELSE (* local time *)
dH := Dates.TimeDiff DIV 60;
dM := Dates.TimeDiff MOD 60
END
END;
h := h-dH; m := m-dM;
WHILE m < 0 DO
DEC(h); INC(m, 60)
END;
h := h+(m DIV 60); m := m MOD 60;
date := Dates.AddDay(date, SHORT(h DIV 24)); h := h MOD 24;
time := h*1000H + m*40H + s;
RETURN TRUE
END GMTTime;
PROCEDURE GetClock*(VAR time, date: LONGINT);
BEGIN
Oberon.GetClock(time, date);
Dates.AddTime(time, date, -Dates.TimeDiff * 60) (* convert to GMT *)
END GetClock;
PROCEDURE ExtractGMTDate*(h: Header; pos: LONGINT; VAR time, date: LONGINT);
VAR
len, i, day, year, month, hour, min, sec: LONGINT;
mo, zone: ARRAY 16 OF CHAR;
j: INTEGER;
BEGIN
time := 0; date := 0;
len := LEN(h.fields^);
IF (pos < 0) OR (pos >= len) THEN
RETURN
END;
i := pos;
WHILE (i < len) & (h.fields[i] # 0X) & (h.fields[i] # ",") DO
INC(i)
END;
IF h.fields[i] = "," THEN
pos := i+1
END;
(* date *)
j := SHORT(pos); Strings.StrToIntPos(h.fields^, day, j); pos := j;
WHILE (i < LEN(mo)-1) & (pos < len) & (h.fields[pos] # 0X) & (h.fields[pos] <= " ") DO
INC(pos)
END;
i := 0;
WHILE (pos < len) & (h.fields[pos] > " ") DO
mo[i] := h.fields[pos]; INC(i); INC(pos)
END;
mo[i] := 0X; month := StrToMonth(mo);
IF (month >= 1) & (month <= 12) THEN
j := SHORT(pos); Strings.StrToIntPos(h.fields^, year, j);
IF year >= 1900 THEN
date := (year-1900)*200H + month*20H + day
ELSIF year < 80 THEN
date := (year+100)*200H + month*20H + day
ELSE
date := year*200H + month*20H + day
END;
(* time *)
Strings.StrToIntPos(h.fields^, hour, j);
WHILE (j < len) & (h.fields[j] # 0X) & (h.fields[j] # ":") DO
INC(j)
END;
IF h.fields[j] = ":" THEN
INC(j); Strings.StrToIntPos(h.fields^, min, j)
ELSE
min := 0
END;
WHILE (j < len) & (h.fields[j] # 0X) & (h.fields[j] <= " ") DO
INC(j)
END;
IF h.fields[j] = ":" THEN
INC(j); Strings.StrToIntPos(h.fields^, sec, j)
ELSE
sec := 0
END;
WHILE (j < len) & (h.fields[j] # 0X) & (h.fields[j] <= " ") DO
INC(j)
END;
i := 0;
WHILE (j < len) & (h.fields[j] > " ") DO
zone[i] := h.fields[j]; INC(i); INC(j)
END;
zone[i] := 0X;
IF GMTTime(hour, min, sec, zone, time, date) THEN
RETURN
END
END;
GetClock(time, date)
END ExtractGMTDate;
PROCEDURE EnumMIME(key, value: ARRAY OF CHAR);
VAR
contType: ContentType;
i, j: LONGINT;
BEGIN
NEW(contType); contType.next := contTypes; contTypes := contType; contType.support := TRUE;
i := 0;
WHILE (key[i] # 0X) & (key[i] # "/") DO
contType.typ[i] := key[i]; INC(i)
END;
contType.typ[i] := 0X; Strings.Lower(contType.typ, contType.typ);
IF key[i] = "/" THEN
INC(i)
END;
j := 0;
WHILE key[i] # 0X DO
contType.subTyp[j] := key[i]; INC(j); INC(i)
END;
contType.subTyp[j] := 0X; Strings.Lower(contType.subTyp, contType.subTyp);
i := 0;
WHILE value[i] > " " DO
contType.suffix[i] := value[i]; INC(i)
END;
contType.suffix[i] := 0X;
WHILE (value[i] # 0X) & (value[i] <= " ") DO
INC(i)
END;
j := 0;
WHILE value[i] > " " DO
contType.prefix[j] := value[i];
INC(j); INC(i)
END;
contType.prefix[j] := 0X;
WHILE (value[i] # 0X) & (value[i] <= " ") DO
INC(i)
END
END EnumMIME;
(** Find a content-type description. *)
PROCEDURE GetContentType*(fullTyp: ARRAY OF CHAR): ContentType;
VAR
contType: ContentType;
typ: ARRAY 32 OF CHAR;
subTyp: ARRAY 64 OF CHAR;
i, j: LONGINT;
BEGIN
i := 0;
WHILE (fullTyp[i] # 0X) & (fullTyp[i] # "/") DO
typ[i] := fullTyp[i]; INC(i)
END;
typ[i] := 0X; Strings.Lower(typ, typ);
IF fullTyp[i] = "/" THEN
INC(i)
END;
j := 0;
WHILE fullTyp[i] # 0X DO
subTyp[j] := fullTyp[i]; INC(j); INC(i)
END;
subTyp[j] := 0X; Strings.Lower(subTyp, subTyp);
IF typ = "" THEN
typ := "text"
END;
IF subTyp = "" THEN
subTyp := "plain"
END;
contType := contTypes;
WHILE (contType # NIL) & ~((contType.typ = typ) & (contType.subTyp = subTyp)) DO
contType := contType.next
END;
IF contType = NIL THEN
NEW(contType); contType.next := contTypes; contTypes := contType; contType.support := FALSE;
COPY(typ, contType.typ); COPY(subTyp, contType.subTyp);
contType.prefix := ""; contType.suffix := ""
END;
RETURN contType
END GetContentType;
PROCEDURE LoadTypes;
VAR S: Texts.Scanner; key: ARRAY 64 OF CHAR;
BEGIN
contTypes := NIL;
Oberon.OpenScanner(S, "MIME");
IF S.class = Texts.Inval THEN
Out.String("Oberon.Text - MIME not found"); Out.Ln
END;
WHILE S.class IN {Texts.Name, Texts.String} DO
COPY(S.s, key); Texts.Scan(S);
IF (S.class = Texts.Char) & (S.c = "=") THEN
Texts.Scan(S);
IF S.class IN {Texts.Name, Texts.String} THEN
EnumMIME(key, S.s); Texts.Scan(S)
END
ELSE S.class := Texts.Inval
END
END;
NEW(textCont); textCont.typ := GetContentType("text/plain"); textCont.encoding := Enc8Bit;
textCont.h := NIL; textCont.pos := 0; textCont.len := MAX(LONGINT)-BufLen-1
END LoadTypes;
(** Create a temporary file name for contType. *)
PROCEDURE MakeTempName*(contType: ContentType; VAR tempName: ARRAY OF CHAR);
BEGIN
COPY(contType.prefix, tempName);
Strings.Append(tempName, "Temp.");
Strings.Append(tempName, contType.suffix)
END MakeTempName;
PROCEDURE ExtractContentType*(h: Header; pos: LONGINT; VAR cont: Content);
VAR
len, i: LONGINT;
fullTyp: ARRAY 32+64 OF CHAR;
BEGIN
NEW(cont); cont.typ := GetContentType(TextMime); cont.encoding := EncBin;
cont.h := h; cont.pos := pos;
len := LEN(h.fields^);
IF (pos < 0) OR (pos >= len) THEN
RETURN
END;
WHILE (pos < len) & (h.fields[pos] # 0X) & (h.fields[pos] <= " ") DO
INC(pos)
END;
i := 0;
WHILE (pos < len) & (h.fields[pos] > " ") & (h.fields[pos] # ";")DO
fullTyp[i] := h.fields[pos]; INC(i); INC(pos)
END;
fullTyp[i] := 0X; cont.typ := GetContentType(fullTyp);
cont.pos := pos; cont.len := MAX(LONGINT)
END ExtractContentType;
PROCEDURE ReadText*(in: Streams.Stream; VAR W: Texts.Writer; cont: Content; mail: BOOLEAN);
VAR
buffer: ARRAY BufLen OF CHAR;
len, rlen, i, offs, maxLen: LONGINT;
ch, ch1: CHAR;
iso, quoted, cr: BOOLEAN;
BEGIN
iso := cont.encoding IN {Enc8Bit, Enc7Bit, EncQuoted}; quoted := cont.encoding = EncQuoted;
IF cont.h # NIL THEN
FindParam(cont.h, cont.pos, "charset", buffer); iso := iso OR (buffer # "")
END;
ch := 0X; cr := FALSE;
offs := 0; maxLen := cont.len;
in.mode := Streams.binary; len := in.Available(in);
WHILE (maxLen > 0) & ((len > 0) OR (~in.eos & in.buffer)) DO
IF len > (BufLen-2) THEN
rlen := BufLen-2
ELSE
rlen := len
END;
IF rlen > maxLen THEN
rlen := maxLen
END;
in.ReadBytes(in, buffer, rlen); DEC(maxLen, rlen);
i := 0;
WHILE i < rlen DO
IF (buffer[i] = Strings.CR) OR (buffer[i] = Strings.LF) THEN
IF (buffer[i] = Strings.LF) & cr THEN
(* ignore LF after CR *)
ELSE
Texts.WriteLn(W);
IF mail & (offs = 1) & (ch = ".") THEN
RETURN
END;
offs := 0
END;
cr := (buffer[i] = Strings.CR)
ELSIF iso THEN
ch := buffer[i];
IF ~quoted OR (ch # "=") THEN
ch := Strings.ISOToOberon[ORD(ch)];
IF ~mail OR (offs > 0) OR (ch # ".") THEN
Texts.Write(W, ch)
END
ELSE
INC(i);
IF i < rlen THEN
ch := buffer[i]; INC(i)
ELSE
Streams.Read(in, ch); INC(rlen); DEC(maxLen)
END;
IF i < rlen THEN
ch1 := buffer[i]
ELSE
Streams.Read(in, ch1); INC(rlen); DEC(maxLen)
END;
IF Strings.IsHexDigit(ch) & Strings.IsHexDigit(ch1) THEN
ch := Strings.ISOToOberon[HexVal(ch)*16+HexVal(ch1)];
Texts.Write(W, ch); ch := 0X
ELSIF (ch1 = Strings.LF) OR (ch = Strings.LF) THEN
(* Texts.WriteLn(W); offs := 0 *)
ELSE
Texts.Write(W, "=");
Texts.Write(W, ch); Texts.Write(W, ch1);
INC(offs, 2); ch := ch1
END
END;
INC(offs)
ELSE
ch := buffer[i];
IF ~mail OR (offs > 0) OR (ch # ".") THEN
Texts.Write(W, ch)
END;
INC(offs)
END;
INC(i)
END;
DEC(len, rlen);
IF len <= 0 THEN
len := in.Available(in)
END
END
END ReadText;
PROCEDURE SearchBoundary(F: Files.File; VAR boundary: ARRAY OF CHAR; VAR pos: LONGINT): BOOLEAN;
CONST
MaxPatLen = 128;
VAR
sPat: ARRAY MaxPatLen OF CHAR;
sDv: ARRAY MaxPatLen + 1 OF LONGINT;
i, l, sPatLen: LONGINT;
R: Files.Rider;
prev, ch: CHAR;
PROCEDURE CalcDispVec;
VAR i, j, d: LONGINT;
BEGIN
i := 1; d := 1;
WHILE i <= sPatLen DO
j := 0;
WHILE (j + d < sPatLen) & (sPat[j] = sPat[j + d]) DO
INC(j)
END;
WHILE i <= j + d DO
sDv[i] := d; INC(i)
END;
INC(d)
END
END CalcDispVec;
BEGIN
COPY(boundary, sPat);
sPatLen := Strings.Length(sPat);
CalcDispVec(); prev := 0X;
IF sPatLen > 0 THEN
Files.Set(R, F, pos); prev := ch; Files.Read(R, ch);
INC(pos); l := Files.Length(F); i := 0;
WHILE (i # sPatLen) & (pos <= l) DO
IF (i = 0) & (prev >= " ") THEN
prev := ch; Files.Read(R, ch); INC(pos)
ELSE
IF ch = sPat[i] THEN
INC(i);
IF i < sPatLen THEN
prev := ch; Files.Read(R, ch); INC(pos)
END
ELSIF i = 0 THEN
prev := ch; Files.Read(R, ch); INC(pos)
ELSE
i := i - sDv[i]
END
END
END
ELSE
i := -1
END;
RETURN i = sPatLen
END SearchBoundary;
PROCEDURE TextEncoding*(h: Header; pos: LONGINT; cont: Content);
VAR
val: ARRAY 64 OF CHAR;
i: LONGINT;
BEGIN
ExtractValue(h, pos, val);
i := 0; Strings.CAPSearch("quoted", val, i);
IF i >= 0 THEN
cont.encoding := EncQuoted
ELSE
i := 0; Strings.Search("7", val, i);
IF i > 0 THEN
cont.encoding := Enc7Bit
ELSE
cont.encoding := Enc8Bit
END
END;
cont.len := MAX(LONGINT)
END TextEncoding;
PROCEDURE HorzRule(VAR W: Texts.Writer; name: ARRAY OF CHAR);
VAR f: BasicFigures.Figure;
BEGIN
NEW(f); BasicFigures.InitRect3D(f, Display.Width, 2);
Gadgets.NameObj(f, name);
Texts.WriteObj(W, f); Texts.WriteLn(W)
END HorzRule;
PROCEDURE DecodePart(F: Files.File; beg, end: LONGINT; T: Texts.Text; VAR W: Texts.Writer; VAR parts: Part; mail: BOOLEAN);
VAR
R: Files.Rider;
S, wS: Streams.Stream;
h: Header;
cont: Content;
pos, begPart, n, oldBeg: LONGINT;
val: ARRAY 64 OF CHAR;
part: Part;
ch: CHAR;
BEGIN
Files.Set(R, F, beg);
Files.Read(R, ch); INC(beg);
WHILE (ch <= " ") & (beg <= end) DO
Files.Read(R, ch); INC(beg)
END;
IF ch = "-" THEN
RETURN
END;
NEW(part);
IF parts = NIL THEN
part.no := 0
ELSE
part.no := parts.no+1
END;
part.next := parts; parts := part;
S := Streams.OpenFileReader(F, beg-1); S.mode := Streams.iso8859; oldBeg := beg-1;
Texts.Append(T, W.buf);
wS := TextStreams.OpenWriter(T); begPart := T.len;
ReadHeader(S, wS, h, n);
IF (n > 0) & ~((h.fields[0] = 0X) & (h.fields[1] = 0X)) THEN
wS.Flush(wS); INC(beg, n)
ELSE
DEC(beg)
END;
pos := FindField(h, "Content-Type"); ExtractContentType(h, pos, cont);
FindParam(h, pos, "name", part.name);
Strings.IntToStr(part.no, val); HorzRule(W, val);
Texts.Insert(T, begPart, W.buf);
S := Streams.OpenFileReader(F, beg); S.mode := Streams.binary;
pos := FindField(h, "Content-Disposition");
IF pos > 0 THEN
pos := FindField(h, "Content-Transfer-Encoding");
IF pos > 0 THEN
ExtractValue(h, pos, val);
IF Strings.CAPPrefix("Base64", val) THEN
Texts.WriteString(W, "Base64.Decode ");
pos := FindField(h, "Content-Disposition");
FindParam(h, pos, "filename", val);
IF part.name = "" THEN
COPY(val, part.name)
END;
Texts.WriteString(W, val); Texts.WriteString(W, " ~"); Texts.WriteLn(W);
Texts.Append(T, W.buf); cont.encoding := EncBase64
ELSIF cont.typ.typ = "text" THEN
TextEncoding(h, pos, cont)
ELSIF Strings.CAPPrefix("Quoted", val) THEN
Texts.WriteString(W, "QuotedPrintable.DecodeFile ");
pos := FindField(h, "Content-Disposition");
FindParam(h, pos, "filename", val);
IF part.name = "" THEN
COPY(val, part.name)
END;
Texts.WriteString(W, val); Texts.WriteString(W, " ~"); Texts.WriteLn(W);
Texts.Append(T, W.buf); cont.encoding := EncBin
ELSE
cont.encoding := EncBin
END
ELSE
cont.encoding := EncBin
END
ELSE
pos := FindField(h, "Content-Transfer-Encoding");
TextEncoding(h, pos, cont)
END;
IF part.name = "" THEN
COPY(cont.typ.typ, part.name);
Strings.AppendCh(part.name, "/");
Strings.Append(part.name, cont.typ.subTyp)
END;
Texts.Insert(T, begPart, W.buf); (*Texts.WriteLn(W);*)
cont.len := end-beg; ReadText(S, W, cont, mail); (*Texts.WriteLn(W)*)
END DecodePart;
PROCEDURE DecodeMultipartFile(F: Files.File; VAR T: Texts.Text; boundary: ARRAY OF CHAR; mail: BOOLEAN);
VAR
W: Texts.Writer;
last, next, parts: Part;
obj: Objects.Object;
cmd: ARRAY 64 OF CHAR;
pos, beg, end, len: LONGINT;
BEGIN
NEW(T); Texts.Open(T, ""); Texts.OpenWriter(W);
pos := 0; end := 0; len := Files.Length(F); parts := NIL;
IF SearchBoundary(F, boundary, pos) THEN
DecodePart(F, 0, pos-Strings.Length(boundary)-2, T, W, parts, mail);
WHILE end < len DO
beg := pos;
IF SearchBoundary(F, boundary, pos) THEN
end := pos-Strings.Length(boundary)-2
ELSE
end := len+1
END;
DecodePart(F, beg, end, T, W, parts, mail)
END
END;
Texts.Append(T, W.buf);
last := NIL;
WHILE parts # NIL DO
next := parts.next; parts.next := last;
last := parts; parts := next
END;
Texts.WriteLn(W);
parts := last;
WHILE parts # NIL DO
Texts.WriteString(W, "[ ");
Texts.SetColor(W, SHORT(Display3.blue));
Texts.WriteString(W, parts.name);
Texts.SetColor(W, SHORT(Display3.textC));
obj := Gadgets.CreateObject("TextGadgets.NewControl");
cmd := "HTMLDocs.Locate '";
Strings.IntToStr(parts.no, boundary);
Strings.Append(cmd, boundary);
Attributes.SetString(obj, "Cmd", cmd);
Texts.WriteObj(W, obj);
Texts.WriteString(W, " ] ");
parts := parts.next
END;
Texts.WriteLn(W); Texts.WriteLn(W);
Texts.Insert(T, 0, W.buf)
END DecodeMultipartFile;
PROCEDURE ReadMultipartText*(in: Streams.Stream; VAR T: Texts.Text; cont: Content; mail: BOOLEAN);
VAR
h: Header;
F: Files.File;
R: Files.Rider;
buffer: ARRAY BufLen OF CHAR;
boundary: ARRAY 128 OF CHAR;
len, rlen, i, state, maxLen: LONGINT;
BEGIN
maxLen := cont.len; state := 1; h := cont.h;
F := Files.New(""); Files.Set(R, F, 0);
in.mode := Streams.binary; len := in.Available(in);
WHILE (maxLen > 0) & ((len > 0) OR ~in.eos) DO
IF len > BufLen THEN
rlen := BufLen
ELSE
rlen := len
END;
IF rlen > maxLen THEN
rlen := maxLen
END;
in.ReadBytes(in, buffer, rlen); DEC(maxLen, rlen);
IF mail THEN
i := 0;
WHILE (i < rlen) & (state # 2) DO
IF (buffer[i] = Strings.CR) OR (buffer[i] = Strings.LF) THEN
state := 1
ELSIF (state > 0) & (buffer[i] = ".") THEN
INC(state);
IF (i < (rlen-1)) & (buffer[i+1] = ".") THEN
INC(i); INC(state)
END
ELSE
state := 0
END;
INC(i)
END;
IF state = 2 THEN
maxLen := 0
END
END;
Files.WriteBytes(R, buffer, rlen);
len := in.Available(in)
END;
FindParam(h, cont.pos, "boundary", buffer);
boundary := "--"; Strings.Append(boundary, buffer);
DecodeMultipartFile(F, T, boundary, mail)
END ReadMultipartText;
PROCEDURE HexDigit(i: LONGINT): CHAR;
BEGIN
IF i < 10 THEN
RETURN CHR(i+ORD("0"))
ELSE
RETURN CHR(i-10+ORD("A"))
END
END HexDigit;
PROCEDURE WriteText*(T: Texts.Text; beg, end: LONGINT; out: Streams.Stream; cont: Content; mail, crlf: BOOLEAN);
VAR
buffer: ARRAY BufLen OF CHAR;
R: Texts.Reader;
i, j, offs: LONGINT;
ch: CHAR;
iso, quoted: BOOLEAN;
BEGIN
iso := cont.encoding IN {Enc8Bit, Enc7Bit, EncQuoted}; quoted := cont.encoding = EncQuoted;
Texts.OpenReader(R, T, beg);
offs := 0; i := 0; out.mode := Streams.binary;
Texts.Read(R, ch); INC(beg);
WHILE ~R.eot & (beg <= end) DO
IF R.lib IS Fonts.Font THEN
IF ch = Strings.CR THEN
out.WriteBytes(out, buffer, i);
out.WriteBytes(out, Strings.CRLF, 2);
offs := 0; i := 0
ELSIF mail & (ch = ".") & (offs = 0) THEN
IF i > (MaxLine-3) THEN
out.WriteBytes(out, buffer, i); i := 0
END;
buffer[i] := ch; buffer[i+1] := ch; INC(offs, 2); INC(i, 2)
ELSIF ch # Strings.LF THEN
IF iso THEN
ch := Strings.OberonToISO[ORD(ch)];
IF ~quoted OR ((ch < CHR(128)) & (ch # "=")) THEN
buffer[i] := ch
ELSE
IF i > (MaxLine-3) THEN
out.WriteBytes(out, buffer, i); i := 0
END;
buffer[i] := "=";
buffer[i+1] := HexDigit((ORD(ch) DIV 16) MOD 16);
buffer[i+2] := HexDigit(ORD(ch) MOD 16);
INC(i, 2); INC(offs, 2)
END
ELSE
buffer[i] := ch
END;
INC(i);
IF mail & (offs >= (MaxSMTPLine-5)) THEN
j := i-1;
WHILE (j > 0) & (buffer[j] > " ") DO
DEC(j)
END;
IF j > 0 THEN
INC(j);
out.WriteBytes(out, buffer, j);
out.WriteBytes(out, Strings.CRLF, 2);
IF j < i THEN
offs := i-j;
FOR i := j TO offs DO
out.WriteBytes(out, buffer[i], 1)
END
ELSE
offs := 0
END
ELSE
out.WriteBytes(out, buffer, i);
out.WriteBytes(out, Strings.CRLF, 2); offs := 0
END;
i := 0
ELSIF i >= MaxLine THEN
out.WriteBytes(out, buffer, i); i := 0
END;
INC(offs)
END
END;
Texts.Read(R, ch); INC(beg)
END;
out.WriteBytes(out, buffer, i);
IF crlf THEN
out.WriteBytes(out, Strings.CRLF, 2)
END
END WriteText;
PROCEDURE WriteISOMime*(S: Streams.Stream; cont: Content);
BEGIN
S.mode := Streams.iso8859;
TextStreams.WriteString(S, MimeVersion); TextStreams.WriteLn(S);
TextStreams.WriteString(S, "Content-Type: "); TextStreams.WriteString(S, TextMime);
TextStreams.WriteString(S, "; charset="); TextStreams.WriteString(S, ISOVer);
TextStreams.WriteLn(S);
IF cont.encoding = EncQuoted THEN
TextStreams.WriteString(S, ContEncQuoted)
ELSIF cont.encoding = Enc7Bit THEN
TextStreams.WriteString(S, ContEnc7Bit)
ELSE
TextStreams.WriteString(S, ContEnc8Bit)
END;
TextStreams.WriteLn(S);
IF (cont.len > 0) & (cont.len < MAX(LONGINT)) THEN
TextStreams.WriteString(S, "Content-Length: "); TextStreams.WriteInt(S, cont.len, 0); TextStreams.WriteLn(S)
END
END WriteISOMime;
BEGIN
LoadTypes()
END MIME.