如何使用Indy 10和OpenSSL通过HTTPS下载文件？

Question

我有以下任务:使用HTTPS和身份验证下载文件.Indy似乎要走了,但由于某种原因它到目前为止还不起作用.我有以下内容:

• 我用来下载的TIdHTTP组件
• 用于创建URL的TIdURI组件
• 应该提供安全连接的TIdSSLIOHandlerSocketOpenSSL组件.所需的DLL位于二进制文件夹中.

该站点还需要身份验证,我在URL中包含用户/传递,如下例所示.简而言之,这是代码:

URI := TIdURI.Create('https://test.example.com/');
URI.Username := ParamUserName;
URI.Password := ParamPassword;

HTTP := TIdHTTP.Create(nil);
if URI.Protocol = 'https' then
begin
  IOHandler := TIdSSLIOHandlerSocketOpenSSL.Create(nil);
  IOHandler.SSLOptions.Method := sslvSSLv3;
  HTTP.IOHandler := IOHandler;
end;

HTTP.Get(URI.GetFullURI([ofAuthInfo]), FileStream);

使用此代码,我可以非常快速地获得"读取超时"EIdReadTimeout异常.在浏览器中测试URL可以正常工作.关于什么缺失或我做错了什么的任何想法？

Answer 1

我最终放弃了Indy和OpenSSL并使用WinInet进行下载.这是适合我的代码:

function Download(URL, User, Pass, FileName: string): Boolean;
const
  BufferSize = 1024;
var
  hSession, hURL: HInternet;
  Buffer: array[1..BufferSize] of Byte;
  BufferLen: DWORD;
  F: File;
begin
   Result := False;
   hSession := InternetOpen('', INTERNET_OPEN_TYPE_PRECONFIG, nil, nil, 0) ;

   // Establish the secure connection
   InternetConnect (
     hSession,
     PChar(FullURL),
     INTERNET_DEFAULT_HTTPS_PORT,
     PChar(User),
     PChar(Pass),
     INTERNET_SERVICE_HTTP,
     0,
     0
   );

  try
    hURL := InternetOpenURL(hSession, PChar(URL), nil, 0, 0, 0) ;
    try
      AssignFile(f, FileName);
      Rewrite(f,1);
      try
        repeat
          InternetReadFile(hURL, @Buffer, SizeOf(Buffer), BufferLen) ;
          BlockWrite(f, Buffer, BufferLen)
        until BufferLen = 0;
      finally
        CloseFile(f) ;
        Result := True;
      end;
    finally
      InternetCloseHandle(hURL)
    end
  finally
    InternetCloseHandle(hSession)
  end;
end;