js能否判断一个链接的http状态

songlingxi 2014-02-08 12:32:17

例如bbs.csdn.net/topics/3907043101这个地址是404
不嵌套这个页面的情况下是否能得到404

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wjm116035 2015-01-22

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不知怎么操作!

hellNo 2014-02-08

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var url = "http://bbs.csdn.net/topics/3907043101";
jQuery.ajax({
            type: "post",
            async: false,
            dataType: "json",
            url: "Default.aspx/UrlIsExist",
            contentType: "application/json; charset=utf-8",
            cache: false,
            data: '{url:\"' + url + '"}',
            success: function (data) {
                if (data.d == "true") {
                   //地址可用
                }else{
                   //地址不存在 
                }
            },
            Error: function (error) {
                alert(error);
            }
        });


[WebMethod]
private static string UrlExistsUsingHttpWebRequest(string url)
    {
        HttpWebRequest webReqst = (HttpWebRequest)WebRequest.Create(url);
        webReqst.Method = "GET";
        webReqst.KeepAlive = true;
        webReqst.Timeout = 300;
        string result = false;
        try
        {
            HttpWebResponse webResponse = (HttpWebResponse)webReqst.GetResponse();

            if (webResponse.StatusCode == HttpStatusCode.OK && webResponse.ContentLength < 1024 * 1024)
            {
                result = "true";
            }
        }
        catch
        {
            result = "false";
        }
        return result;

    }