用javascript脚本调用Yahoo! Search API实现搜索的效果

最新推荐文章于 2026-01-08 20:54:44 发布

转载最新推荐文章于 2026-01-08 20:54:44 发布 · 1k 阅读

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#yahoo #search #javascript #脚本 #api #exception

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本文介绍了一种利用JavaScript脚本调用Yahoo!Search API的方法，通过具体示例展示了如何实现网络搜索功能，包括构造请求、解析响应等关键步骤。

下面我们看一下，如何用 javascript脚本调用Yahoo! Search API实现搜索的效果，全部脚本如下：

/*
* yahoo_search_api.js
* Part of the Yahoo! Search Sidebar for Firefox
* powered by Yahoo! Search web services (http://api.search.yahoo.com)
* Written by Marc Abramowitz (http://marc.abramowitz.info)
* Copyright (C) 2005 Yahoo! Inc.
* www.knowsky.com
*/

function Yahoo_Search() {}

Yahoo_Search.baseURL = function () {
return "http://api.search.yahoo.com/WebSearchService/V1/";
}

Yahoo_Search.appid = function () {
return "YahooSearchSidebar";
}

Yahoo_Search.baseArgs = function () {
return "appid=" + this.appid();
}

Yahoo_Search.Results = function (args) {
var xmlUrl = this.baseURL() + "webSearch?"
       + this.baseArgs()
       + "&query=" + args["Doc"]
       + "&zip="
       + "&start=" + args["First"]
       + "&results=" + args["Count"];
var xmlhttp = new XMLHttpRequest();
xmlhttp.open("GET", xmlUrl, false);
xmlhttp.send(null);
return this.readXML(xmlhttp.responseXML);
}

Yahoo_Search.readXML = function (xmlDoc) {
try {
    var retVal = new Array();
    var resultSet = xmlDoc.getElementsByTagName("ResultSet")[0];
    var totalResultsAvailable = parseInt(resultSet.getAttribute("totalResultsAvailable"));
    var totalResultsReturned = parseInt(resultSet.getAttribute("totalResultsReturned"));
    var firstResultPosition = parseInt(resultSet.getAttribute("firstResultPosition"));
    var start = firstResultPosition;
    var end = firstResultPosition + totalResultsReturned - 1;
    var results = xmlDoc.getElementsByTagName("Result");
    for (var i = 0; i < results.length; i++) {
      var result = results[i];
      var title = result.getElementsByTagName('Title')[0].firstChild.nodeValue;
      var summary = '';
      if (result.getElementsByTagName('Summary')[0].firstChild) {
        summary = result.getElementsByTagName('Summary')[0].firstChild.nodeValue;
      }
      var clickUrl = result.getElementsByTagName('ClickUrl')[0].firstChild.nodeValue;
      var url = result.getElementsByTagName('Url')[0].firstChild.nodeValue;
      retVal[i] = { I: start + i, Title: title, Summary: summary, ClickUrl: clickUrl, Url: url };
    }

return retVal;
} catch(exception) {
alert('Exception occurred while reading XML (i=' + i + '; start=' + start + ';end=' + end + '): ' + exception);
}
}