inno-setup - Inno Download Plugin: skip download if not exists...?

Question

How to skip automatically a download if the url doesn't exists or there isn't internet connection...? Thanks in advance & cheers... ;-)

[Code]
procedure InitializeWizard();
begin
    idpAddFile('http://127.0.0.1/test1.zip', ExpandConstant('{tmp}\test1.zip'));
    idpDownloadAfter(wpReady);
end;

Answer 1

参考 Inno 下载插件文档，我认为最好的方法是尝试检查 url/文件是否存在，如果存在，则将其添加到下载列表中。根据文档，idpGetFileSize获取 url 中给定的文件大小，如果能够正确计算文件大小，则返回 true。尝试这个...

[Code]
procedure InitializeWizard();
var 
    size: Int64;
begin
    if idpGetFileSize('http://127.0.0.1/test1.zip', size) then
        idpAddFile('http://127.0.0.1/test1.zip', ExpandConstant('{tmp}\test1.zip'));
    idpDownloadAfter(wpReady);
end;

Answer 2

查看下载插件文档，我发现这个选项也有效：

[Code]
procedure InitializeWizard();
begin
    idpSetOption('ErrorDialog',  'none');
    idpAddFile('http://127.0.0.1/test1.zip', ExpandConstant('{tmp}\test1.zip'));
    idpDownloadAfter(wpReady);
end;