我正在做一个Twitter API请求,它返回包含#awkward的所有推文的JSON。以下是服务器上的成功响应:http://babbage.cs.missouri.edu/~atgvyc/php/election_tweets/index.php
但我希望能够在我的JavaScript中使用该JSON并通过for循环解析它以获取某些信息(特别是地理标记和位置)。我以为我可以用AJAX和JSON.parse做到这一点,但它没有像我想象的那样工作。
有什么建议吗?
这是我的PHP脚本:
<?php
require_once('TwitterAPIExchange.php');
$settings = array(
'oauth_access_token' => "XXX",
'oauth_access_token_secret' => "XXX",
'consumer_key' => "XXX",
'consumer_secret' => "XXX"
);
$url = 'https://api.twitter.com/1.1/search/tweets.json';
$getfield = '?q=#awkward&geocode=38.949926,-92.330037,35mi&result_type=recent';
$requestMethod = 'GET';
$twitter = new TwitterAPIExchange($settings);
echo $twitter->setGetfield($getfield)
->buildOauth($url, $requestMethod)
->performRequest();
?>
这是我的HTML:
<!DOCTYPE html>
<html>
<head>
<title>Sample elections tweets</title>
<script>
function loadXMLDoc()
{
var xmlhttp;
if (window.XMLHttpRequest)
{// code for IE7+, Firefox, Chrome, Opera, Safari
xmlhttp=new XMLHttpRequest();
}
else
{// code for IE6, IE5
xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
}
xmlhttp.onreadystatechange=function()
{
if (xmlhttp.readyState==4 && xmlhttp.status==200)
{
var json = JSON.parse(xmlhttp.responseText);
//here's where i'd like to put a for-loop
}
}
xmlhttp.open("GET","index.php",true);
xmlhttp.send();
}
</script>
</head>
<body>
<h2>AJAX</h2>
<button type="button" onclick="loadXMLDoc()">Request data</button>
<body>
答案 0 :(得分:1)
好的,我想我知道你现在要做什么。确实没有开箱即用的“for each”,就像在php中一样,这就是为什么很多框架都有自己的实现(jQuery的$ .each()),或者做原型。但是,您可以通过以下方式完成所需的操作。如果需要,你可以用alert()替换所有的console.log(),但是它不会出现在Chrome的开发工具(大多数机器上的f12)中。另外,如果Dale Musser还在那里告诉他你好! MIZ
function loadXMLDoc()
{
var xmlhttp;
if (window.XMLHttpRequest)
{// code for IE7+, Firefox, Chrome, Opera, Safari
xmlhttp=new XMLHttpRequest();
}
else
{// code for IE6, IE5
xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
}
xmlhttp.onreadystatechange=function()
{
if (xmlhttp.readyState==4 && xmlhttp.status==200)
{
var json = JSON.parse(xmlhttp.responseText);
//log entire json struct to developer console for easy viewing
console.log(json);
//you can reference individual pieces of json by doing something like
//json.statuses or json.statuses[2]
var statuses = json.statuses;
for(var i=0;i<statuses.length;i++){
var curStatus = statuses[i];
//access bits directly
var tweetAuthor = curStatus.user.name;
var tweetTime = curStatus.created_at;
//iterate hashtags
var hashtags = curStatus.entities.hashtags;
for(var k=0;k<hashtags.length;k++){
console.log("Hashtag: " + hashtags[k].text);
}
//iterate all elements of tweet
for(var key in curStatus){
var attrName = key;
var attrValue = curStatus[key];
console.log("attribute name: " + attrName);
console.log("attribute key: " + attrValue);
if(attrName = "text") {
//Do something with tweet texts... like:
//document.getElementById("statuses").appendChild(attrValue);
}
}
}
}
}
xmlhttp.open("GET","index.php",true);
xmlhttp.send();
}