首页 > 代码库 > win平台下, 检测网络是否连接最好的办法

win平台下, 检测网络是否连接最好的办法

[Delphi]检查URL是否有效的函数

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
function CheckUrl(url: string): boolean;
var
  hSession, hfile, hRequest: hInternet;
  dwindex, dwcodelen: dword;
  dwcode: array[1..20of char;
  res: pchar;
begin
  if pos(‘http://‘, lowercase(url)) = 0 then
    url := ‘http://‘ + url;
  Result := false;
  hSession := InternetOpen(‘InetURL:/1.0‘, INTERNET_OPEN_TYPE_PRECONFIG, nilnil0);
  if assigned(hsession) then
  begin
    hfile := InternetOpenUrl(hsession, pchar(url), nil0, INTERNET_FLAG_RELOAD, 0);
    dwIndex := 0;
    dwCodeLen := 10;
    HttpQueryInfo(hfile, HTTP_QUERY_STATUS_CODE, @dwcode, dwcodeLen, dwIndex);
    res := pchar(@dwcode);
    result := (res = ‘200‘or (res = ‘302‘);
    if assigned(hfile) then
      InternetCloseHandle(hfile);
    InternetCloseHandle(hsession);
  end;
end;

 

http://www.cnblogs.com/chonghai/p/5581402.html

http://bbs.2ccc.com/topic.asp?topicid=514550

 

win平台下, 检测网络是否连接最好的办法