请问能否用JavaScript提取其他网站的网页并保存到一个字符串变量里？

vnking 2009-02-03 01:57:10

请问能否用JavaScript提取其他网站的网页并保存到一个字符串变量里？

然后自己解析提取有用数据，在自己的页面中显示！

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f10icq 2009-02-09

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用JavaScript截取网页中的有用代码，放到自己的显示区域内。

archu 2009-02-04

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提醒一下，如果你是Windows系统的话，而且你是做web server的情况，使用ServerXMLHTTP比较好。至于为什么，你可以参考以下文章：
http://support.microsoft.com/kb/290761

vincentmax 2009-02-04

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good, studying.

homejiji 2009-02-04

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mark

lihan6415151528 2009-02-03

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不会有这段提示吧。楼主参考下面代码



<html>

<head>

    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />

</head>

<body>

<script type="text/javascript">



$ = document.getElementById;



var ForAppending = 8; // 追加模式

var ForReading = 1; // 读取模式

var ForWriting = 2; // 写入模式



function AppendFileText(filename, text)

{

    var fso = new ActiveXObject("Scripting.FileSystemObject"); // 文件系统

    var istream = fso.OpenTextFile(filename, ForAppending, true);

    if (!istream) return;

    try {

        istream.write(text);

        istream.Close();

        return true;

    } catch (e) {

        return false;

    } finally {

        istream = null;

        fso = null;

    }

}



/// <summary>

/// 追加日志

/// </summary>

/// <param name="text">日志文本</param>

function AppendLog(text) {

    $("TextareaLog").value += text;

    AppendFileText("log.txt", text);

}



/// <summary>

/// 获取链接的文本内容

/// </summary>

/// <param name="url">页面链接地址</param>

/// <returns>返回页面HTML文本</returns>

function GetUrlText(url) {

    var xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");

    try {

        xmlhttp.open("get", url, false);

        xmlhttp.send();

        return xmlhttp.responseText;

    } catch (e) {

        return "";

    } finally {

        xmlhttp = null;

    }

}



function dateFormat(date, separator){

    date = typeof date == "number" ? new Date(date) : 

        (typeof date == "string" ? new Date(Date.parse(date)) : date);

    separator = typeof separator == "string" ? separator : "$1年$2月$3日 $4时$5分$6秒";

    var str = "" + date.getFullYear() + "-" + (date.getMonth() + 101) + "-" + (date.getDate() + 100) + " " +

        (date.getHours() + 100) + ":" +(date.getMinutes() + 100) + ":" + (date.getSeconds() + 100);

    return str.replace(/^(\d+)-\d*(\d{2})-\d*(\d{2}) \d*(\d{2}):\d*(\d{2}):\d*(\d{2})$/g, separator);

}



function GameItem(itemText) {

	var re = /<td>\s*<a\s+href="\/Games\/PawnList.aspx\?id=(\d+)&checkid=(\d+)"\s*target="_blank">\s*([A-Z]+)：\s*(.*?)<\/a>\s*<\/td>\s*<td>\s*(.*?)\s*<\/td>\s*<td>\s*(\d+)\s*\/\s*(\d+)\s*.*?<\/td>/ig;

	var match = re.exec(itemText);

	if (!match) return;

	this.gameid = match[1];

	this.checkid = match[2];

	this.index = match[3];

	this.caption = match[4];

	this.odds = match[5];

	this.point = match[6];

	this.count = match[7];

}



function GameInfos(htmlText) {

	htmlText = htmlText.replace(/\r\n/g, " ");

	var re = /<span\s+class="time">停止时间：(.*?)<\/span>/ig;

	var match = re.exec(htmlText);

	this.time = new Date(match[1].replace(/-/g, "//"));

	

	var matchs = htmlText.match(/<td>\s*<a\s+href="\/Games\/PawnList.aspx\?id=(\d+)&checkid=(\d+)"\s*target="_blank">\s*([A-Z]+)：\s*(.*?)<\/a>\s*<\/td>\s*<td>\s*(.*?)\s*<\/td>\s*<td>\s*\d+\s*\/\s*\d+\s*.*?<\/td>/ig);

	this.items = [];

	this.point = 0;

	this.count = 0;

	for (var i = 0; matchs && i < matchs.length; i++) {

		var item = new GameItem(matchs[i]);

		this.items.push(item);

		this.point += parseInt(item.point);

		this.count += parseInt(item.count);

	}

}



function PostRequest(url, deleteInfo) 

{

    var data = "__EVENTTARGET=&__EVENTARGUMENT=&__VIEWSTATE=" + encodeURIComponent(deleteInfo.viewState) + 

        "&reasonGroup=2&ctl00%24ContentPlaceHolder1%24tb_Reason=" + encodeURIComponent($("TextReason").value) + 

        "&ctl00%24ContentPlaceHolder1%24bt_Submit=%E7%A1%AE%E5%AE%9A&" + 

        "__EVENTVALIDATION=" + encodeURIComponent(deleteInfo.eventValidation);

    var xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");

    try {

        xmlhttp.open("Post", url, false); 

        xmlhttp.setRequestHeader("Referer", url); 

        xmlhttp.setRequestHeader("Content-Type", "application/x-www-form-urlencoded"); 

        xmlhttp.setRequestHeader("Accept-Encoding", "gzip,deflate"); 

        xmlhttp.setRequestHeader("Content-Length", data.length); 

        xmlhttp.send(data); 

        return xmlhttp.responseText;

    } catch (e) {

        return e.message;

    } finally {

        xmlhttp = null;

    }

} 



function CheckboxRefreshClick() {

	if (!$("CheckboxRefresh").checked) return;

	var htmlText = GetUrlText("http://community.csdn.net/Games/GamePawn.aspx?id=" + $("TextareaId").value + "&_t_" + Math.random());

	var gameInfos = new GameInfos(htmlText);

	var note = "";

	var webTime = new Date(new Date().getTime() + parseInt($("TextareaDiffer").value));

	note += "时间：" + dateFormat(gameInfos.time) + "\r\n";

	note += "时间：" + dateFormat(webTime) + "\r\n";

	note += "倒计时：" + (gameInfos.time - webTime) / 1000 + "秒\r\n";

	note += "总分数：" + gameInfos.point + "\r\n";

	note += "总人数：" + gameInfos.count + "\r\n";

	note += "-------明细------\r\n";

	for (var i = 0; i < gameInfos.items.length; i++) {

		note += "选项：" + gameInfos.items[i].index + ",";

		note += "人数：" + gameInfos.items[i].count + ",";

		note += "分数：" + gameInfos.items[i].point + ",";

		note += "平均：" + parseInt(gameInfos.items[i].point) / parseInt(gameInfos.items[i].count) + "\t";

		note += gameInfos.items[i].caption + "\r\n";

	}

	$("TextareaNote").value = note;

	setTimeout("CheckboxRefreshClick();", parseInt($("TextareaDelay").value));

}

</script>



<table style="width:100%;height:100%;">

    <tr style="height:10%">

        <td>

            <div>

                ID：<input type="input" value="337" id="TextareaId" style="width:50px;" />

				<input type="checkbox" id="CheckboxRefresh" onclick="CheckboxRefreshClick();" /><label for="CheckboxRefresh">自动刷新</label>

				刷新频率(毫秒)：<input type="input" value="1000" id="TextareaDelay" style="width:60px;" />

				网络时间差(毫秒，服务器减本地时间)：<input type="input" value="12000" id="TextareaDiffer" style="width:60px;"/>

            </div>

            <div>

            </div>

        </td>

    </tr>

    <tr>

        <td>

            信息：

            <textarea id="TextareaNote" style="width:100%; height:100%"></textarea>

        </td>

    </tr>

    <!--<tr>

        <td>

            日志：

            <textarea id="TextareaLog" style="width:100%; height:100%"></textarea>

        </td>

    </tr>-->

</table>

</body>

</html>

vnking 2009-02-03

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楼上的代码可行，谢谢！

不过在浏览时会提示：该页正在访问其控制范围外的信息。这有些危险。是否继续？

如何消除这段提示？

CutBug 2009-02-03

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<html>

<head>

<script>

var xmlHttp = window.ActiveXObject ? new ActiveXObject("Microsoft.XMLHTTP") : new XMLHttpRequest();

window.onload=function()

{

    xmlHttp.open("get","http://topic.csdn.net/u/20090203/13/f5ff51c5-879e-4975-a2f3-2ffe84bdc962.html",true); 

    xmlHttp.onreadystatechange = processRequest;

    xmlHttp.setRequestHeader("Content-Type","application/x-www-form-urlencoded"); 

    xmlHttp.send(null);

} 

function processRequest()

{

    if(xmlHttp.readyState==4)

    {

        if(xmlHttp.status==200)

        {

            alert(xmlHttp.responseText);

            document.getElementById("container").innerHTML=xmlHttp.responseText;

        }

    }

}

</script>

</head>

<body>

<div id="container">



</div>

</body>

</html>