如何使用附加SDK解析Firefox插件中的XML字符串 [英] How to parse a XML string in a Firefox addon using Add-on SDK
问题描述
我正在尝试创建一个FF AddOn,它可以从网站中获取一些XML数据。但是我找不到解析我的RESPONSE的方法。首先我使用了DOMParser,但是我得到了这个错误:
lockquote
ReferenceError DOMParser没有定义
有人建议使用XMLHttpRequest,因为解析是自动完成的,但是我得到这个错误:
lockquote
错误:发生异常。追溯(最近一次调用最后):
文件
资源://jid0-a23vmnhgidl8wlymvolsst4ca98-at-jetpack/api-utils/lib/cuddlefish.js,
第208行,在require
let module,manifest = this.manifest [base],requirer = this.modules [base]; TypeError:this.manifest是未定义的
我真的不知道该怎么做。我必须注意到,我正在使用AddOn生成器来实现这一点。
下面的代码看起来没有用。
选项1:
$ b
exports.main = function(){
require(widget)。Widget({
id:widgetID1,
label:My Mozilla Widget,
contentURL:http:// www。 mozilla.org/favicon.ico,
onClick:function(event){
var Request = require(request)。Request;
var goblecontent = Request({
url:http://www.myexperiment.org/search.xml?query=goble,
onComplete:function(response){
var parser = new DOMParser();
var xml = parser.parseFromString(response.text,application / xml);
var packs = xml.getElementsByTagName(packs);
console.log(packs );
}
});
goblecontent.get();
}
});
};
选项2:
exports.main = function(){
require(widget)。Widget({
id:widgetID1,
label :My Mozilla Widget,
contentURL:http://www.mozilla.org/favicon.ico,
onClick:function(event){
var request = new require(xhr)。XMLHttpRequest();
request.open(GET,http://www.myexperiment.org/search.xml?query=goble,false);
request.send(null);
if(request.status === 200){
console.log(request.responseText);
}
}
});
};
DOMParser
构造函数没有在SDK模块的上下文中定义。您仍然可以使用 chrome但是:
$ b
var {Cc,Ci} = require(chrome );
var parser = Cc [@ mozilla.org/xmlextras/domparser;1\"].createInstance(Ci.nsIDOMParser);
也就是说,您的方法是使用 XMLHttpRequest
也应该可以工作。您错误地使用了 new
操作符,但是您正在创建一个新的require对象的方式。然而,这种方式应该是可行的:
$ b
var {XMLHttpRequest} = require(xhr);
var request = new XMLHttpRequest();
请考虑使用异步 XMLHttpRequest
对象,使用 request.onreadystatechange
来附加你的监听器( xhr
模块目前不支持其他类型的监听器, code> addEventListener )。
I am trying to create a FF AddOn that brings some XML data from a website. But I can't find a way to parse my RESPONSE. First I used DOMParser but I get this error:
ReferenceError: DOMParser is not defined.
Someone suggested to use XMLHttpRequest, because the parsing is done automatically but then I get this other error:
Error: An exception occurred. Traceback (most recent call last):
File "resource://jid0-a23vmnhgidl8wlymvolsst4ca98-at-jetpack/api-utils/lib/cuddlefish.js", line 208, in require let module, manifest = this.manifest[base], requirer = this.modules[base]; TypeError: this.manifest is undefined
I really don't know what else to do. I must note that I am using the AddOn Builder to achieve this.
Below the code that doesn't seem to work.
Option 1:
exports.main = function() {
require("widget").Widget({
id: "widgetID1",
label: "My Mozilla Widget",
contentURL: "http://www.mozilla.org/favicon.ico",
onClick: function(event) {
var Request = require("request").Request;
var goblecontent = Request({
url: "http://www.myexperiment.org/search.xml?query=goble",
onComplete: function (response) {
var parser = new DOMParser();
var xml = parser.parseFromString(response.text, "application/xml");
var packs = xml.getElementsByTagName("packs");
console.log(packs);
}
});
goblecontent.get();
}
});
};
Option 2:
exports.main = function() {
require("widget").Widget({
id: "widgetID1",
label: "My Mozilla Widget",
contentURL: "http://www.mozilla.org/favicon.ico",
onClick: function(event) {
var request = new require("xhr").XMLHttpRequest();
request.open("GET", "http://www.myexperiment.org/search.xml?query=goble", false);
request.send(null);
if (request.status === 200) {
console.log(request.responseText);
}
}
});
};
DOMParser
constructor isn't defined in the context of SDK modules. You can still get it using chrome authority however:
var {Cc, Ci} = require("chrome");
var parser = Cc["@mozilla.org/xmlextras/domparser;1"].createInstance(Ci.nsIDOMParser);
That said, your approach with XMLHttpRequest
should work as well. You used the new
operator incorrectly however, the way you wrote it a new "require object" is being created. This way it should work however:
var {XMLHttpRequest} = require("xhr");
var request = new XMLHttpRequest();
Please consider using an asynchronous XMLHttpRequest
object however, use request.onreadystatechange
to attach your listener (the xhr
module currently doesn't support other types of listeners or addEventListener
).
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