问题描述
我有一个用Delphi 2007构建的肥皂,它可以工作!
i have a soap builded with Delphi 2007 and it work!
在Delphi 10.1 Berlin中进行转换后,我有很多例外:
After a conversion in Delphi 10.1 Berlin i have a lot of exceptions:
原因似乎是,当webbroker HttpApp解析请求参数时,如果请求在查询字符串中包含一些url编码的字符,则会引发此异常,例如:
the cause seem, when webbroker HttpApp parsing the request parameters, it raise this exception if request has some url encoded chars in the query string, eg.:
http://localhost/soap/soap.dll/action?param=%E0
实际上,如果我用%E0
(à
URL编码的):
in fact if i call URL.Decode()
with %E0
(à
url encoded):
TNetEncoding.URL.Decode('%E0');
它引发了相同的异常:
方法TURLEncoding.DoDecode(const Input: string): string
上的问题似乎为单元System.NetEncoding
.此方法尝试仅在UTF-8中转换url编码的字符,而不会在 Windows-1252 .字符串%E0
是à
的Windows-1252编码,但是delphi仅转换UTF-8版本:%C3%A0
.
A small (not perfect, not elegant) fix is add a fallback:
try
Result := TEncoding.UTF8.GetString(Bytes); // original Delphi 10.1 line
except
on E: EEncodingError do Result := string(PChar(Bytes)); // fallback
end;
function TURLEncoding.DoDecode(const Input: string): string;
function DecodeHexChar(const C: Char): Byte;
begin
case C of
'0'..'9': Result := Ord(C) - Ord('0');
'A'..'F': Result := Ord(C) - Ord('A') + 10;
'a'..'f': Result := Ord(C) - Ord('a') + 10;
else
raise EConvertError.Create('');
end;
end;
function DecodeHexPair(const C1, C2: Char): Byte; inline;
begin
Result := DecodeHexChar(C1) shl 4 + DecodeHexChar(C2)
end;
var
Sp, Cp: PChar;
I: Integer;
Bytes: TBytes;
begin
SetLength(Bytes, Length(Input) * 4);
I := 0;
Sp := PChar(Input);
Cp := Sp;
try
while Sp^ <> #0 do
begin
case Sp^ of
'+':
Bytes[I] := Byte(' ');
'%':
begin
Inc(Sp);
// Look for an escaped % (%%)
if (Sp)^ = '%' then
Bytes[I] := Byte('%')
else
begin
// Get an encoded byte, may is a single byte (%<hex>)
// or part of multi byte (%<hex>%<hex>...) character
Cp := Sp;
Inc(Sp);
if ((Cp^ = #0) or (Sp^ = #0)) then
raise EHTTPException.CreateFmt(sErrorDecodingURLText, [Cp - PChar(Input)]);
Bytes[I] := DecodeHexPair(Cp^, Sp^)
end;
end;
else
// Accept single and multi byte characters
if Ord(Sp^) < 128 then
Bytes[I] := Byte(Sp^)
else
I := I + TEncoding.UTF8.GetBytes([Sp^], 0, 1, Bytes, I) - 1
end;
Inc(I);
Inc(Sp);
end;
except
on E: EConvertError do
raise EConvertError.CreateFmt(sInvalidURLEncodedChar, [Char('%') + Cp^ + Sp^, Cp - PChar(Input)])
end;
SetLength(Bytes, I);
// ------> MY FIX <------
try
Result := TEncoding.UTF8.GetString(Bytes); // Original line
except
on E: EEncodingError do Result := string(PChar(Bytes));
end;
// END FIX
end;
经过大量搜索,我发现了 RAD Studio 10.1 Berlin的错误修复列表,它表示此错误已修复:
After a lot of search i founds the Bug fix list for RAD Studio 10.1 Berlin and it says this bug is fixed:
但对我不起作用...
but not work for me...
推荐答案
尝试使用WEB.ReqMulti;
try use WEB.ReqMulti;
当WebBroker在表单中存在多字节字符时,使用WebBroker处理来自网页的POST方法时,我有一个相同的例外.
I have the same exception when I user WebBroker to handle a POST method from a web page when there are multi-byte character in form.
当我在WebBroker的项目中添加使用WEB.ReqMulti之后,该异常消失了.
And after I added use WEB.ReqMulti in WebBroker's project, this exception was gone.
这篇关于目标多字节代码页中不存在Unicode字符的映射的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!