Develop Reference

Why is my json get request not working?

I am working on building a movie search app. It is my first time using json. I cannot figure out why my code is not working. I have it running on localhost using xampp.
On submit
$('.search-form').submit(function (evt) {
// body...
evt.preventDefault();
var $searchBar = $('#search');
var omdbApi = 'http://www.omdbapi.com/?';
var movieSearchTerm = $searchBar.val();
var searchData = {
s:movieSearchTerm,
r:json
}
Here is the callback function
function displayMovies(data) {
// for each search result
$.each(data.items,function(i,movie) {
movieHTML += '<li class="desc">';
//movie title
movieHTML += '<a href="' + movie.Title + '" class="movie-title">';
//release year
movieHTML += '<a href="' + movie.Year + '" class="movie-year">';
//poster
movieHTML += '<img src="' + movie.Poster + '" class="movie-poster"></li>';
$('#movies').html(movieHTML);
}); // end each
// movieHTML += '</li>';
}
$.getJSON(omdbApi, searchData, displayMovies);
});//end submit

r:json
You made a typo.
You haven't created a variable called json and the service expects the value of r to be json.
String literals need to be surrounded with a pair of " or '.
data.items
And the JSON returned doesn't have items, it has Search.

WinJS forward custom object to print function

I use WinJS in my application and try to print some content. Made my printer class according to this tutorial https://dzone.com/articles/windows-8-print-contract-%E2%80%93.
function registerForPrintContract(participiantData) {
var printManager = Windows.Graphics.Printing.PrintManager.getForCurrentView();
printManager.addEventListener("printtaskrequested", onPrintTaskRequested, false);
}
function onPrintTaskRequested(printEvent) {
var printTask = printEvent.request.createPrintTask("Print Example", function (args) {
printCurrentPage(args);
printTask.oncompleted = onPrintTaskCompleted;
});
}
function printCurrentPage(args) {
var docHtml = document.createDocumentFragment();
docHtml.appendChild(createDocumentContent());
args.setSource(MSApp.getHtmlPrintDocumentSource(docHtml));
}
function createDocumentContent() {
var container = document.createElement("div");
container.innerHTML = "<h2>" + firstname + " " + lastname + "</h2>" +
"<h4>" + emailaddress1 + "<h4>";
return container;
}
function showPrintUI() {
Windows.Graphics.Printing.PrintManager.showPrintUIAsync();
}
My problem is that I do not know how to forward some object data to createDocumentContent() function. In this example I put firstname, lastname and email. Those data I cannot get from html page I need to send them on print button click.
All examples I saw are about printing current page or making new content from data which we can get from HTML page by querying DOM, no example where I can send custom object.
What is the best way to do this ?

My problem is that I do not know how to forward some object data to createDocumentContent() function. In this example I put firstname, lastname and email. Those data I cannot get from html page I need to send them on print button click.
Do you mean you want to put the html output of "<h2>"+firstname + " " +lastname+"</h2>"+"<h4>" + emailaddress1 + "<h4>" to your print page?
The behavior of innerHTML has changed in Windows Store App Development.
see HTML and DOM API changes list innerHTML section:
Content is filtered as through it was processed by the toStaticHTML method
But WinJS offers a method that you can utilize to inject HTML.
Here is the link to documentation of this method: WinJS.Utilities.insertAdjacentHTML
Here is a code snippet that shows a simple use this method:
function createDocumentContent() {
var obj = {
firstname: "winffee",
lastname: "xia",
emailaddress1:"test#126.com"
}
var htmlString = "<h2>" + obj.firstname + " " + obj.lastname + "</h2>" +
"<h4>" + obj.emailaddress1 + "<h4>";
var container = document.createElement("div");
WinJS.Utilities.insertAdjacentHTML(container, "beforeend", htmlString);
return container;
}

Why does the Flickr public feed API return "undefined" before displaying photo results when accessed by jQuery?

I started working with APIs/Ajax/JSON recently and began a small project to test my knowledge.
I made a simply website where you type a word into a form and it brings back Flickr photos associated with the word.
It works pretty well, but it always includes a simple "undefined" before the first photo which messes with the display of the first row of pictures.
An example can be seen here, simply search for a photo tag and you'll see what I'm talking about:
http://codepen.io/anon/pen/jPExNm
Here is the related jQuery:
$('form').submit(function (evt) {
evt.preventDefault();
// the AJAX part
var flickerAPI = "http://api.flickr.com/services/feeds/photos_public.gne?jsoncallback=?";
var query = $('#photoQuery').val();
var flickrOptions = {
tags: query,
format: "json"
};
function displayPhotos(data) {
var photoHTML;
$.each(data.items,function(i,photo) {
photoHTML += '<div class="photo">';
photoHTML += '<a href="' + photo.link + '" class="image">';
photoHTML += '<img src="' + photo.media.m + '"></a></div>';
}); // end each
$('#photoGallery').html(photoHTML);
}
$.getJSON(flickerAPI, flickrOptions, displayPhotos);
}); // end submit
I haven't found any errors related to this in the Javascript console and couldn't find anything like this while Googling, so I'm turning to StackOverflow. Thank you for any and all help.

Because
var photoHTML;
is the same thing as
var photoHTML = undefined;
Basic example of what you are doing
var str;
str = str + "123"; // undefined + "123" = "undefined123";
You need to set it to an empty string
var photoHTML = "";

Construct the URL from JSON feed

Could anyone please advise me of what am I doing wrong here?
I am trying to construct the image URL but using the flickr.photos.search method
now (I need to display images close to geolocation of the visitor), I had it
working before with groups_pool.gne and the JSON feed was different (simpler)
formatted but now..
The URL is working, I get the array with all the data I need (farm, server,
secret and id) but can't construct the url for the photo.
$.getJSON("http://api.flickr.com/services/rest/?method=flickr.photos.search&api_\
key=KEY&format=json&privacy_filter=0&media=photos&has_geo=1&accuracy=13&sort=int\
erestingness-desc&content_type=1&per_page=32&extras=geo,owner_name&page=1&radius\
_units=km&radius=1.521739&lat=40.952532&lon=-4.1326349999999366&text=Alcazar&jso\
ncallback=jsonp1320163051486", getJSONimages);
function getJSONimages(data) {
var htmlString = "";
$.each(data.photos.photo, function(i,item){
htmlString += '<img src="http://farm'+ item.farm +'.static.flickr.com/'+
item.server +'/'+ item.id +'_'+ item.secret +'_m.jpg" />';
});
$('#slideshow').html(htmlString);
Thank you.
I have added the url_m in the extras, in the URL to get the JSON feed and I get the full URL in my feed and that should help as I do not have to concatenate the rest but still doesn't work.
I can't get it to work, and it's extremely frustrating as I know is very simple.
Well, not for me obviously.
This is my function, after I get the url_m in the loop:
function getJSONimages(data) {
var htmlString = "";
$.each(data.photos.photo, function(i,item){
// var url = (item.url_m).replace("\", "");
htmlString += '<img src="' + item.url_m + '" />';
});
$('#slideshow').html(htmlString);
}
Even if I use the "url" variable or no, same result.
However, I have noticed something.
In the feed using groups_pool.gne, where I am able to pull the photos
successfully, I go to the media.m like that:
$.each(data.items, function(i,item){
var biggestSize = (item.media.m).replace("_m.jpg", ".jpg");
htmlString += '<img src="' + biggestSize + '" />';
Notice that I have items, then media, then m with it's own value! Is actually
items.[media: {m:PHOTOURL}].
Where as in this other JSON feed using the flickr.photos.search method, I have
the following "object path":
jsonFlickrApi.photos.photo[{url_m:PHOTOURL}]
And try to use this loop:
$.each(data.photos.photo, function(i,item){
htmlString += '<img src="' + item.url_m + '" />';
I think this is my problem but I don't have any ideas how to approach it. It's
obvious there is a different structure between the two feeds:
items.[media: {m:PHOTOURL}]
photos.photo[{url_m:PHOTOURL}]
I am going to research more on jQuery loops. Any ideas?

Weirdly these docs don't mention getting the farm. Can you console.log your item in the $.each loop and see what you get?
http://www.flickr.com/services/api/flickr.photos.search.html
It's clearly the right URL format though assuming you get all of those pieces:
http://www.flickr.com/services/api/misc.urls.html
EDIT
Can you tell me what this says (in the alert box):
$.each(data.photos.photo, function(i,item){
var url = 'http://farm'+ item.farm +'.static.flickr.com/' + item.server +'/'+ item.id +'_'+ item.secret +'_m.jpg';
alert(url);
});

A URL is not a JSON object so you cannot parse it.
You're trying get the URL parameters.
Include the following function and use it like this.
lat = querySt('lat');
lon = querySt('lon');
function querySt(ji) {
hu = window.location.search.substring(1);
gy = hu.split("&");
for (i=0;i<gy.length;i++) {
ft = gy[i].split("=");
if (ft[0] == ji) {
return ft[1];
}
}
}
You might want to modify this part
hu =window.location.search.substring(1);
to
hu = yourURLVariable;
if you're getting the URL from somewhere else.

How to parse XML string value using jQuery?

I am new to jquery. I am trying to parse xml string using jquery. I have found one sample:
$(function () {
$.get('data.xml', function (d) {
var data = "";
var startTag = "<table border='1' id='mainTable'><tbody><tr><td style=\"width: 120px\">Name</td><td style=\"width: 120px\">Link</td></tr>";
var endTag = "</tbody></table>";
$(d).find('url').each(function () {
var $url = $(this);
var link = $url.find('link').text();
var name = $url.find('name').text();
data += '<tr><td>' + name + '</td>';
data += '<td>' + link + '</td></tr>';
});
$("#content").html(startTag + data + endTag);
});
});
In this case, I am able to parse and fetch the values from xml file, but now what I am looking for is instead of reading file from a URL, I want to read the xml from string. Say, instead of data.xml I want to parse string which consists of well formed xml.
Does anyone have any idea about this ?
Thanks in advance
Edit :
I tried a sample code on following xml;
<?xml version="1.0" encoding="utf-8" ?>
<Urls>
<url>
<name>google</name>
<link>www.google.com</link>
</url>
<url>
<name>aspdotnetcodebook</name>
<link>http://aspdotnetcodebook.blogspot.com</link>
</url>
</Urls>
When I try this on xml file, everything works fine. But when I switched to string, it returns nothing for link attribute. I am calling it as;
$(function() {
var data = $('<?xml version="1.0" encoding="utf-8" ?><Urls><url><name>google</name><link>www.google.com</link></url><url><name>aspdotnetcodebook</name><link>http://aspdotnetcodebook.blogspot.com</link></url></Urls>');
alert(data);
doWhateverItIsYourDoing(data);
});
I am unable to diagnose why this is happening.

Just pass the string directly?
function doWhateverItIsYoureDoing(xml) {
var data = "";
var startTag = "<table border='1' id='mainTable'><tbody><tr><td style=\"width: 120px\">Name</td><td style=\"width: 120px\">Link</td></tr>";
var endTag = "</tbody></table>";
$(xml).find('url').each(function() {
var $url = $(this);
var link = $url.find('link').text();
var name = $url.find('name').text();
data += '<tr><td>' + name + '</td>';
data += '<td>' + link + '</td></tr>';
});
$("#content").html(startTag + data + endTag);
}
your .get could be rewritten as:
$.get('data.xml',doWhateverItIsYoureDoing );
and if you have xml in a string already, then
var data = "<?xml version=\"1......";
doWhateverItIsYoureDoing(data);

Just put that well-formed XML string into a jQuery object:
var xml = "<?xml version=\"1.0\"?><Dialog><Adam Emotion=\"strong\">I love you!</Adam><Eva Emotion=\"low\">I love you, too!</Eva></Dialog>";
access with
alert($(xml).find('Adam').text());
or
alert($(xml).find('Adam').attr('Emotion'));

put the the XML string into javascript variable
var xmlString = $(‘<?xml version=”1.0″?><Customers><Customer Name=”Allan Border” Age=”26″ ContactNumber=”004416165245″ Address=”Unit # 24 East London” City=”London” Country=”England”></Customer><Customer Name=”Jennifer” Age=”28″ ContactNumber=”004416165248″ Address=”Unit # 28 West London” City=”London” Country=”England”></Customer></Customers>’);
Now you can parse the XML as iterate through each of the customer node…
$(xmlString).find("Customer").each(function () {
var customerName = $(this).attr("Name");
var age = $(this).attr("Age");
var contactNumber = $(this).attr("ContactNumber");
var address = $(this).attr("Address");
var city = $(this).attr("City");
var country = $(this).attr("Country");
});

Note that to properly parse any type of XML file, you want to use the parseXML() function as in:
var xml_jquery_object = jQuery.parseXML(xml);
When you do as presented in the other answers:
var html_jquery_object = jQuery(xml);
you ask jQuery to parse HTML and not XML. The big difference is that HTML removes some tags (body, html, head...) and expects certain tags to be empty (br, hr, ...). So it is likely to break the parsing of your XML file if it somehow includes such tags.
xml can be a direct string as well, of course. The AJAX .get() function returns a string to your function anyway. (The better .ajax() function can return an XML object directly.) So you may define any XML code in that variable as in:
xml = "<?xml version='1.0'?><test>...</test>";