delphi 使用idhttp+TIdMultiPartFormDataStream 上傳表單post文件並解決ssl問題

最近工作需要對接企業微信的推送信息接口

里面有發文件的功能

所以特地記錄下上傳文件並且使用idhttp遇到的訪問ssl網址報錯問題

參考文檔：https://blog.csdn.net/huohuotu/article/details/77337087

官方上傳臨時素材文檔：https://work.weixin.qq.com/api/doc/90000/90135/90253

下面不多說，直接貼上代碼

 

function xxx.UploadFile(const sAccessToken, sFile, sFileType: string):string;
var
  IdHttp: TIdHTTP;
  MutPartForm: TIdMultiPartFormDataStream;
  Ms: TStringStream;
  sTmp: string;
begin
  Result := '';
  try
    Ms := TStringStream.Create('', TEncoding.UTF8);
    IdHttp := TIdHttp.Create(nil);
    IdHttp.ReadTimeout := 30000;
    MutPartForm := TIdMultiPartFormDataStream.Create;
    try
      IdHttp.AllowCookies    := True;
      IdHttp.HandleRedirects := True; //允許重定向
      // Http1.1
      IdHttp.HTTPOptions := IdHttp.HTTPOptions + [hoKeepOrigProtocol];
      IdHttp.ProtocolVersion := pv1_1;
      //MutPartForm.AddFormField('file', sFile);
      sTmp := Format('http://qyapi.weixin.qq.com/cgi-bin/media/upload?access_token=%s&type=%s',[sAccessToken, sFileType]);
      IdHttp.Post(sTmp, MutPartForm, Ms);
      Result := Ms.DataString;
    finally
      Ms.Free;
      IdHttp.Free;
      MutPartForm.Free;
    end;
  except
    on E: Exception do Result := E.Message;
  end;
end;

　　

但是這段代碼會遇到兩個問題：

1：發送的文件顯示了完整的路徑和文件名

2：有時候會報 IOHandler value is not valid錯誤

當然，如果你不在意文件名並且沒有遇到這個報錯問題的話，可以用這段代碼

下面是解決這兩個問題的改進版：

function xxx.UploadFile(const sAccessToken, sFile, sFileType: string):string;
var
  IdHttp: TIdHTTP;
  MutPartForm: TIdMultiPartFormDataStream;
  Ms: TStringStream;
  sTmp: string;
  LStream: TIdReadFileExclusiveStream;
  SSLIO: TIdSSLIOHandlerSocketOpenSSL;
begin
  Result := '';
  try
    Ms := TStringStream.Create('', TEncoding.UTF8);
    IdHttp := TIdHttp.Create(nil);
    IdHttp.ReadTimeout := 30000;
    MutPartForm := TIdMultiPartFormDataStream.Create;
    LStream := TIdReadFileExclusiveStream.Create(sFile);
    SSLIO := TIdSSLIOHandlerSocketOpenSSL.Create(nil);
    try
      IdHttp.AllowCookies    := True;
      IdHttp.HandleRedirects := True; //允許重定向
      SSLIO.SSLOptions.Method:=sslvTLSv1;
      SSLIO.SSLOptions.Mode := sslmClient;
      IdHttp.IOHandler := SSLIO;
      // Http1.1
      IdHttp.HTTPOptions := IdHttp.HTTPOptions + [hoKeepOrigProtocol];
      IdHttp.ProtocolVersion := pv1_1;
      MutPartForm.AddObject('media', 'application/octet-stream', LStream, ExtractFileName(sFile));
      sTmp := Format('http://qyapi.weixin.qq.com/cgi-bin/media/upload?access_token=%s&type=%s',[sAccessToken, sFileType]);
      IdHttp.Post(sTmp, MutPartForm, Ms);
      Result := Ms.DataString;
    finally
      LStream.Free;
      Ms.Free;
      IdHttp.Free;
      MutPartForm.Free;
      SSLIO.Free;
    end;
  except
    on E: Exception do Result := E.Message;
  end;
end;

　　

 需要增加uses引用的單元：IdGlobal, IdHTTP, IdMultipartFormData, IdSSLOpenSSL

 三個參數 ，獲取的access_token, 文件路徑，和文件類型，

文件類型：分別有圖片（image）、語音（voice）、視頻（video），普通文件(file)