使用 Javascript 合并 JSON api 响应
我正在尝试从 Topsy (http://code.google.com/p/otterapi/) 获取分页 json 响应,但在合并对象时遇到问题。我想在浏览器中执行此操作,因为 api 速率限制是针对每个 ip/用户的,并且在服务器端执行操作的速率较低。
这是我的代码。有更好的办法吗?当然有,因为这是行不通的。我想我想让这个工作正常进行,但也想了解是否有更安全和/或更有效的方法。
我收到的错误消息是...
TypeError: 表达式 'window.holdtweetslist.prototype' [undefined] 的结果不是对象。
提前致谢。
干杯 斯蒂芬
$("#gettweets").live('click', function(event){
event.preventDefault();
getTweets('stephenbaugh');
});
function getTweets(name) {
var MAX_TWEETS = 500;
var TWEETSPERPAGE = 50;
var BASE = 'http://otter.topsy.com/search.json?type=tweet&perpage=' + TWEETSPERPAGE + '&window=a&nohidden=0&q=@' + name + '&page=1';
var currentpage = 1;
alert(BASE);
$.ajax({
dataType: "json",
url: BASE,
success: function(data) {
window.responcesreceived = 1;
var response=data.response;
alert(response.total);
window.totalweets = response.total;
window.pagestoget = Math.ceil(window.totalweets/window.TWEETSPERPAGE);
window.holdtweetslist = response.list;
window.holdtweetslist.prototype.Merge = (function (ob) {var o = this;var i = 0;for (var z in ob) {if (ob.hasOwnProperty(z)) {o[z] = ob[z];}}return o;});
// alert(data);
;; gotTweets(data);
var loopcounter = 1;
do
{
currentpage = currentpage + 1;
pausecomp(1500);
var BASE = 'http://otter.topsy.com/search.json?type=tweet&perpage=' + TWEETSPERPAGE + '&window=a&nohidden=0&q=@' + name + '&page=' + currentpage;
alert(BASE);
$.ajax({dataType: "json", url: BASE, success: gotTweets(data)});
}
while (currentpage<pagestoget);
}
});
};
function gotTweets(data)
{
window.responcesreceived = window.responcesreceived + 1;
var response = data.response;
alert(response.total);
window.holdtweetslist.Merge(response.list);
window.tweetsfound = window.tweetsfound + response.total;
if (window.responcesreceived == window.pagestoget) {
// sendforprocessingsendtweetlist();
alert(window.tweetsfound);
}
}
I am trying get paged json responses from Topsy (http://code.google.com/p/otterapi/) and am having problems merging the objects. I want to do this in browser as the api rate limit is per ip/user and to low to do things server side.
Here is my code. Is there a better way? Of course there is because this doesn't work. I guess I want to get this working, but also to understand if there is a safer, and/or more efficient way.
The error message I get is ...
TypeError: Result of expression 'window.holdtweetslist.prototype' [undefined] is not an object.
Thanks in advance.
Cheers
Stephen
$("#gettweets").live('click', function(event){
event.preventDefault();
getTweets('stephenbaugh');
});
function getTweets(name) {
var MAX_TWEETS = 500;
var TWEETSPERPAGE = 50;
var BASE = 'http://otter.topsy.com/search.json?type=tweet&perpage=' + TWEETSPERPAGE + '&window=a&nohidden=0&q=@' + name + '&page=1';
var currentpage = 1;
alert(BASE);
$.ajax({
dataType: "json",
url: BASE,
success: function(data) {
window.responcesreceived = 1;
var response=data.response;
alert(response.total);
window.totalweets = response.total;
window.pagestoget = Math.ceil(window.totalweets/window.TWEETSPERPAGE);
window.holdtweetslist = response.list;
window.holdtweetslist.prototype.Merge = (function (ob) {var o = this;var i = 0;for (var z in ob) {if (ob.hasOwnProperty(z)) {o[z] = ob[z];}}return o;});
// alert(data);
;; gotTweets(data);
var loopcounter = 1;
do
{
currentpage = currentpage + 1;
pausecomp(1500);
var BASE = 'http://otter.topsy.com/search.json?type=tweet&perpage=' + TWEETSPERPAGE + '&window=a&nohidden=0&q=@' + name + '&page=' + currentpage;
alert(BASE);
$.ajax({dataType: "json", url: BASE, success: gotTweets(data)});
}
while (currentpage<pagestoget);
}
});
};
function gotTweets(data)
{
window.responcesreceived = window.responcesreceived + 1;
var response = data.response;
alert(response.total);
window.holdtweetslist.Merge(response.list);
window.tweetsfound = window.tweetsfound + response.total;
if (window.responcesreceived == window.pagestoget) {
// sendforprocessingsendtweetlist();
alert(window.tweetsfound);
}
}
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您将
Merge
作为静态方法调用,但将其声明为“实例”方法(对于prototype
保留字)。从 Merge 声明中删除
prototype
,这样您将得到:这将修复 javascript 错误。
You are calling
Merge
as an static method, but declared it as an "instance" method (for theprototype
reserved word).Remove
prototype
from Merge declaration, so you'll have:This will fix the javascript error.
我是 Topsy 的 Vipul。您能分享一下您收到的 JSON 文本吗?我想确保您不会收到不完整的回复。
This is Vipul from Topsy. Would you share the literal JSON you are receiving? I want to ensure you are not receiving a broken response.
感谢 Edgar 和 Vipul 的帮助。不幸的是他们能够回答我的问题。我已经设法解决这个问题是 jquery 无法正确解析 json 并且需要将 jsonp 与 topsy 一起使用的组合。
这是我创建的一个有效的小测试。
创建一个包含此对象的文档...。
您将需要 JQUERY
并将以下内容也放入脚本中。它会循环显示 Topsy 所需数量的推文。
再次感谢大家。
THanks to Edgar and Vipul for there help. Unfortunately they were able to answer my questions. I have managed to work out that the issue was a combination of jquery not parsing the json properly and needing to use jsonp with topsy.
Here is a little test I created that works.
Create a doc with this object on it ....
You will need JQUERY
And put the following in a script too. The is cycle through the required number of tweets from Topsy.
Thanks again everyone.