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DanishMale

error 0xc0000142

By DanishMale, in Network, Cloud and Web

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DanishMale    0

DanishMale
Posted (edited)

I have this DLL:

  

library WEB;

{ Important note about DLL memory management: ShareMem must be the
  first unit in your library's USES clause AND your project's (select
  Project-View Source) USES clause if your DLL exports any procedures or
  functions that pass strings as parameters or function results. This
  applies to all strings passed to and from your DLL--even those that
  are nested in records and classes. ShareMem is the interface unit to
  the BORLNDMM.DLL shared memory manager, which must be deployed along
  with your DLL. To avoid using BORLNDMM.DLL, pass string information
  using PChar or ShortString parameters. }

uses
  ShareMem, SysUtils, Variants, Classes, System.Net.URLClient,
  System.Net.HttpClient, System.Net.HttpClientComponent, StrUtils;

const
  BrowserAgent: Array[0..1] of String = ( // Add as many as you wish
                                        'Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:102.0) Gecko/20100101 Firefox/102.0',
                                        'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.102 Safari/537.36 Edge/18.19582'
                                        );

var
  NetHTTPClient1: TNetHTTPClient;
  theResponse: TStream;
  theHeader: TNetHeaders;
  HeaderArray: TStrings;
  DummyValue: String;

{$R *.res}

function Split(Delimiter: Char; Str: string): TStrings;
var
  ListOfStrings: TStringList;
begin
  ListOfStrings                 := TStringList.Create;
  ListOfStrings.Delimiter       := Delimiter;
  ListOfStrings.StrictDelimiter := True; // Requires D2006 or newer.
  ListOfStrings.DelimitedText   := Str;
  Result                        := ListOfStrings;
end;


function GetHTTP(theURL,theHeaders, theOptions: PChar): PChar; {$ifdef win32} Stdcall;{$endif} Export;
var
  I: Integer;
begin
  if theURL <> '' then
  begin
    try
      theHeader := TNetHeaders.Create();
      theResponse := TStream.Create;
      NetHTTPClient1 := TNetHTTPClient.Create(nil);
      NetHTTPClient1.AcceptCharSet := 'UTF-8';
      NetHTTPClient1.UserAgent := BrowserAgent[Random(2)];
      try
        if theHeaders <> '' then
        begin
          HeaderArray := Split('|',String(theHeaders));
          for I := 0 to HeaderArray.Count - 1 do
          begin
            theHeader[I].Value := HeaderArray[I];
          end;
        end;
        if UpperCase(theOptions) = 'YES' then
        begin
          DummyValue := PChar(NetHTTPClient1.Options(String(theURL),theResponse,theHeader).StatusText);
        end;
        Result := PChar(NetHTTPClient1.Get(String(theURL),theResponse, theHeader).ContentAsString());
      except
        on E : Exception do
          Result := PChar('<html><head><title>Error page - '+E.ClassName+'</title></head>'+
                    '<body bgcolor="#ffffff" leftmargin="0" topmargin="0" '+
                    'marginwidth="0" marginheight="0"><table width="75%" '+
                    'border="0" cellpadding="50" cellspacing="0"><tr>'+
                    '<td><h3>Request error - '+E.ClassName+'</h3><p>The page you requested could '+
                    'not be found - due to an error.</p><p>This may has '+
                    'been caused by the following scenario:</p><ul><li>'+
                    '<p>'+E.Message+'.</p></li></ul>'+
                    '<p>Apology for the inconvenience.</p></td> </tr>'+
                    '</table></body></html>');
      end;
    finally
      theResponse.Free;
      theHeader := nil;
      NetHTTPClient1.Free;
    end;
  end
  else
  begin
    Result := PChar('<html><head><title>400 Error</title></head>'+
                    '<body bgcolor="#ffffff" leftmargin="0" topmargin="0" '+
                    'marginwidth="0" marginheight="0"><table width="75%" '+
                    'border="0" cellpadding="50" cellspacing="0"><tr>'+
                    '<td><h3>Bad Request</h3><p>The page you requested could '+
                    'not be found - due to a 400 error.</p><p>This may have '+
                    'been caused by the following scenarios:</p><ul><li>'+
                    '<p>You may have typed the address wrong</p></li><li>'+
                    '<p> We may have moved the page, created a bad link or '+
                    'be experiencing temporary problems.</p></li></ul>'+
                    '<p>Apology for the inconvenience.</p></td> </tr>'+
                    '</table></body></html>');
  end;
end;

function PostHTTP(theURL,PostData,theHeaders, theOptions: PChar): PChar; {$ifdef win32} Stdcall;{$endif} Export;
var
  I: Integer;
begin
  if theURL <> '' then
  begin
    try
      theHeader := TNetHeaders.Create();
      theResponse := TStream.Create;
      NetHTTPClient1 := TNetHTTPClient.Create(nil);
      NetHTTPClient1.AcceptCharSet := 'UTF-8';
      NetHTTPClient1.UserAgent := BrowserAgent[Random(2)];
      try
        if theHeaders <> '' then
        begin
          HeaderArray := Split('|',String(theHeaders));
          for I := 0 to HeaderArray.Count - 1 do
          begin
            theHeader[I].Value := HeaderArray[I];
          end;
        end;
        if UpperCase(theOptions) = 'YES' then
        begin
          DummyValue := PChar(NetHTTPClient1.Options(String(theURL),theResponse,theHeader).StatusText);
        end;
        Result := PChar(NetHTTPClient1.Post(String(theURL),String(PostData),theResponse, theHeader).ContentAsString());
      except
        on E : Exception do
          Result := PChar('<html><head><title>Error page - '+E.ClassName+'</title></head>'+
                    '<body bgcolor="#ffffff" leftmargin="0" topmargin="0" '+
                    'marginwidth="0" marginheight="0"><table width="75%" '+
                    'border="0" cellpadding="50" cellspacing="0"><tr>'+
                    '<td><h3>Request error - '+E.ClassName+'</h3><p>The page you requested could '+
                    'not be found - due to an error.</p><p>This may has '+
                    'been caused by the following scenario:</p><ul><li>'+
                    '<p>'+E.Message+'.</p></li></ul>'+
                    '<p>Apology for the inconvenience.</p></td> </tr>'+
                    '</table></body></html>');
      end;
    finally
      theResponse.Free;
      theHeader := nil;
      NetHTTPClient1.Free;
    end;
  end
  else
  begin
    Result := PChar('<html><head><title>400 Error</title></head>'+
                    '<body bgcolor="#ffffff" leftmargin="0" topmargin="0" '+
                    'marginwidth="0" marginheight="0"><table width="75%" '+
                    'border="0" cellpadding="50" cellspacing="0"><tr>'+
                    '<td><h3>Bad Request</h3><p>The page you requested could '+
                    'not be found - due to a 400 error.</p><p>This may have '+
                    'been caused by the following scenarios:</p><ul><li>'+
                    '<p>You may have typed the address wrong</p></li><li>'+
                    '<p> We may have moved the page, created a bad link or '+
                    'be experiencing temporary problems.</p></li></ul>'+
                    '<p>Apology for the inconvenience.</p></td> </tr>'+
                    '</table></body></html>');
  end;
end;

exports
  GetHTTP, PostHTTP;

begin
end.

and this EXE to call

  

unit Unit2;

interface

uses
  Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
  Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls;

type
  TForm2 = class(TForm)
    WEBResult: TMemo;
    HTTPURL: TEdit;
    Button1: TButton;
    PostData: TMemo;
    RequestHeader: TMemo;
    Button2: TButton;
    procedure Button1Click(Sender: TObject);
    procedure Button2Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form2: TForm2;


function GetHT4TP(theURL,theHeaders, theOptions: PChar): PChar; external 'WEB.dll';
function PostHTTP(theURL,PostData,theHeaders, theOptions: PChar): PChar; external 'WEB.dll';

implementation

{$R *.dfm}

procedure TForm2.Button1Click(Sender: TObject);
begin
  WEBResult.Text := String(GetHTTP(PChar(HTTPURL.Text),PChar(RequestHeader.Text), 'No'));
end;

procedure TForm2.Button2Click(Sender: TObject);
begin
  WEBResult.Text := String(PostHTTP(PChar(HTTPURL.Text),PChar(PostData.Text),PChar(RequestHeader.Text), 'No'));
end;

end.

Both are compiled by Delphi 10.4 CE on Windows 10 Pro 22H2 x64 without any errors, however, when the EXE is executed it shows this error :

 

"The program couldn't start correctly (0xc0000142). Click OK to close the program"

 

I guess I have missed something and can't seem to find it ... fresh eyes would be appreciated enormously !!!

 

EDIT:

 

I found out that I just had to remove ShareMem from uses clause and GetHTTP function works as expected, however, PostHTTP shows this error:

 

"Access violation at address 0000000000D8F4B4 in module 'Library.dll'. Read of address 0000000000000008"

Edited by DanishMale

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DanishMale    0

DanishMale
Posted
2 hours ago, David Schwartz said:

aside from the typo?   Yes! 😄 The typo isn't in my file only done my clumsy fingers at insert here

image.png.797ffd3794176c39a2b7761354b8334e.png

 

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