解决方法
编辑,2013年12月：Google已弃用旧的Xml服务,将其替换为
XmlService.此答案中的脚本已更新为使用新服务.新服务需要符合标准的XML& HTML,虽然旧的原谅了丢失关闭标签等问题.
查看Tutorial: Parsing an XML Document.(截至2013年12月,本教程仍然在线,虽然不推荐使用Xml服务.)从该基础开始,您可以利用脚本服务中的XML解析来导航页面.这是一个操作你的例子的小脚本：
function getProgrammeList() {
txt = '<html> <body> <div> <div> <div id="here">hello world!!</div> </div> </div> </html>'
// Put the receieved xml response into XMLdocument format
var doc = Xml.parse(txt,true);
Logger.log(doc.html.body.div.div.div.id +" = "
+doc.html.body.div.div.div.Text ); /// here = hello world!!
debugger; // Pause in debugger - examine content of doc
}
要获得真实页面,请从以下开始：
var url = 'http://blah.blah/whatever?querystring=foobar'; var txt = UrlFetchApp.fetch(url).getContentText(); ....
如果查看@L_301_2@的文档,您将看到支持检索特定标记,例如“div”.找到特定元素的直接子元素,它不会探索整个XML文档.您应该能够编写一个遍历文档的函数来检查每个div元素的id,直到找到您的程序列表.
var programmeList = findDivById(doc,"here");
编辑 – 我忍不住了……
这是一个实用功能,可以做到这一点.
/**
* Find a <div> tag with the given id.
* <pre>
* Example: getDivById( html,'tagVal' ) will find
*
* <div id="tagVal">
* </pre>
*
* @param {Element|Document}
* element XML document or element to start search at.
* @param {String} id HTML <div> id to find.
*
* @return {XmlElement} First matching element (in doc order) or null.
*/
function getDivById( element,id ) {
// Call utility function to do the work.
return getElementByVal( element,'div','id',id );
}
/**
* !Now updated for XmlService!
*
* Traverse the given Xml Document or Element looking for a match.
* Note: 'class' is stripped during parsing and cannot be used for
* searching,I don't know why.
* <pre>
* Example: getElementByVal( body,'input','value','Go' ); will find
*
* <input type="submit" name="btn" value="Go" id="btn" class="submit buttonGradient" />
* </pre>
*
* @param {Element|Document}
* element XML document or element to start search at.
* @param {String} elementType XML element type,e.g. 'div' for <div>
* @param {String} attr Attribute or Property to compare.
* @param {String} val Search value to locate
*
* @return {Element} First matching element (in doc order) or null.
*/
function getElementByVal( element,elementType,attr,val ) {
// Get all descendants,in document order
var descendants = element.getDescendants();
for (var i =0; i < descendants.length; i++) {
var elem = descendants[i];
var type = elem.getType();
// We'll only examine ELEMENTs
if (type == XmlService.ContentTypes.ELEMENT) {
var element = elem.asElement();
var htmlTag = element.getName();
if (htmlTag === elementType) {
if (val === element.getAttribute(attr).getValue()) {
return element;
}
}
}
}
// No matches in document
return null;
}
将此应用于您的示例,我们得到：
function getProgrammeList() {
txt = '<html> <body> <div> <div> <div id="here">hello world!!</div> </div> </div> </html>'
// Get the receieved xml response into an XML document
var doc = XmlService.parse(txt);
var found = getDivById(doc.getElement(),'here');
Logger.log(found.getAttribute(attr).getValue()
+ " = "
+ found.getValue()); /// here = hello world!!
}
注意：有关使用这些实用程序的实际示例,请参阅this answer.
