Question
I've to parse an Html for my iOS app. I read on the web that I should use the Xpath and I found the library TFHpple. I see that this library uses the XpathQuery
https://stackoverflow.com/questions/17966071
italiano
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Russian<!DOCTYPE "html">
<html>
<head>
<meta property="og:site_name" content="Sito 4"/>
<meta property="og:title" content="home"/>
<meta name="viewport" content="width=320" />
<meta name="keywords" content="mobile website,microsite, mobdis,iphone,android" />
<meta name="description" content="Amazingly designed using MobDis.com" />
<meta http-equiv="Content-type" content="text/html; charset=utf-8" />
<meta name="format-detection" content="telephone=no" />
<title>Sito 4/home</title>
<!--[if (!IE)|(gte IE 8)]><!-->
<link href="http://cdn2.mobdis.me/assets/publish-3.4-datauri.css" media="screen" rel="stylesheet" type="text/css" />
<!--<![endif]-->
<!--[if lte IE 7]>
<link href="http://cdn2.mobdis.me/assets/publish-3.4.css" media="screen" rel="stylesheet" type="text/css" />
<![endif]-->
<script type="text/javascript"></script>
<style type="text/css">
body{
background-color: black;
}
</style>
</head>
<body>
<div id='processingScreen' style="width:320px;height:417px;background-color:rgb(0, 0, 128)"><img alt="Publish_loading" src="http://cdn2.mobdis.me/pro_images/publish_loading.gif" style="max-width:100%;max-height:100%;" />
</div>
<div data-role="page" id="home" data-id="94568">
<div data-role="content" id="area" class="canvas" style="width:320px;height:417px;background-color:rgb(0, 0, 128)">
<div id="text-1" data-name="text-1" class="drsElement drsMoveHandle unselectable parentDef" data-content="text" style="width: 320px; height: 50px; top: 0px; left: 0px; z-index: 1; overflow: visible; border-top-left-radius: 5px; border-top-right-radius: 5px; border-bottom-right-radius: 5px; border-bottom-left-radius: 5px; -webkit-box-shadow: rgb(255, 255, 255) 0px 2px 0px inset; "><div style="width: 320px; height: 50px; background-color: transparent; border-color: rgb(112, 150, 171); border-width: 2px; border-style: none none solid; border-top-left-radius: 5px; border-top-right-radius: 5px; border-bottom-right-radius: 5px; border-bottom-left-radius: 5px; background-image: -webkit-gradient(linear, 0% 0%, 0% 100%, from(rgb(181, 221, 242)), to(rgb(181, 221, 242))); " class="txtDef childDef editable" data-pageid="" data-pageurl="" data-exlink="" data-transition="0" id="text-1_content" title="text-1" data-allborderradius="unchecked"><div>
</div>
<div>
<span style="color:#ffffff;"><span style="font-family: futura; "><span style="font-size: 26px; "><span style="text-shadow: rgba(0, 0, 0, 0.59375) 1px 1px 2px; "><strong>Sito 4</strong></span></span></span></span></div>
</div></div><div id="image-1" data-name="image-1" class="drsElement drsMoveHandle unselectable parentDef" data-content="image" style="width: 320px; height: 169px; top: 48px; left: 0px; z-index: 2; " data-src="assets/promozioni.png"><img src="http://cdn2.mobdis.me/uploads/73005/original.png?1375193775" style="width: 320px; height: 169px; " data-pageid="" data-pageurl="" data-exlink="" data-transition="0" id="image-1_content" title="image-1" class="childDef"></div><div id="text-2" data-name="text-2" class="drsElement drsMoveHandle unselectable parentDef" data-content="text" style="width: 320px; height: 100px; top: 277px; left: 0px; z-index: 3; overflow: visible; "><div style="width: 320px; height: 100px; " class="txtDef childDef editable" data-pageid="" data-pageurl="" data-exlink="" data-transition="0" id="text-2_content" title="text-2"><div>
<span style="color:#ffffff;"><span style="font-size: 20px; "><strong>Complimenti hai ottenuto una fantastica promozione!</strong></span></span></div>
</div></div>
<div id="text-3" data-name="text-3" class="drsElement drsMoveHandle unselectable parentDef" data-content="text" style="width: 320px; height: 65px; top: 332px; left: 0px; z-index: 4; overflow: visible; "><div style="width: 320px; height: 65px; " class="txtDef childDef editable" data-pageid="" data-pageurl="" data-exlink="" data-transition="0" id="text-3_content" title="text-3"><div style="text-align: left; ">
<span style="font-size:12px;"><span style="color: rgb(255, 255, 255); ">Scadenza: 29 Ago 2013</span></span></div>
</div></div>
</div>
</div>
<div id="divAds"><a href="http://www.mobdis.com" target="_blank"><img alt="Banner" src="http://cdn2.mobdis.me/pro_images/banner.png" style="display:inline;max-width:100%;" /></a></div>
<div id="divBrowserAlert">The current version of your browser is not supported yet. To ensure full functionality, we recommend using Apple Safari or Google Chrome.<br/>
<button onclick="dismissUnsupportedBrowser('')">Dismiss</button>
<!--<button onclick=window.location = "";">Redirect</button>-->
</div>
<script type="text/javascript">
</script>
<script type="text/javascript">
var mpq = [];
mpq.push(["init", '5fed56e1e4a85990c0fb6ff5294d2d42']);
(function(){var b,a,e,d,c;b=document.createElement("script");b.type="text/javascript";b.async=true;b.src=(document.location.protocol==="https:"?"https:":"http:")+"//api.mixpanel.com/site_media/js/api/mixpanel.js";a=document.getElementsByTagName("script")[0];a.parentNode.insertBefore(b,a);e=function(f){return function(){mpq.push([f].concat(Array.prototype.slice.call(arguments,0)))}};d=["init","track","track_links","track_forms","register","register_once","identify","name_tag","set_config"];for(c=0;c<d.length;c++){mpq[d[c]]=e(d[c])}})();
mpq.track("project_id-13003");
mpq.name_tag('mobdis');
</script>
<div id="scriptImports">
<script src="http://cdn2.mobdis.me/assets/jq-3.4.js" type="text/javascript"></script>
<script src="http://cdn2.mobdis.me/assets/publish-3.4.js" type="text/javascript"></script>
<script src="http://cdn2.mobdis.me/assets/jqm-3.4.js" type="text/javascript"></script>
<!-- -->
<script type="text/javascript">
var root = "http://sito4.mobdis.co/";
var cdn_link = "http://cdn2.mobdis.me/";
var require_passcode = false;
var showWaterMark = false;
var showNone = false;
</script>
</div>
<div id="divAutho" class="autho_56930"></div>
<div id="restrictMode" class="divBasic"></div>
<noscript style="color:red;font-size:1em;top:0px;left:0px;position:absolute;display:block;background: #363636;color:#fbb041;height:100%;text-align:center;">Javascript is disabled in your browser.<br /> Please enable the javascript.</noscript>
</body>
</html>
I'm interesting in two information about this html:
this <title>Sito 4/home</title>
this <span style="color: rgb(255, 255, 255); ">Scadenza: 29 Ago 2013</span>
For now I wrote this code:
- (void)loadDataFromHtml {
NSURL *url = [NSURL URLWithString:stringUrl];
NSData *data = [NSData dataWithContentsOfURL:url];
TFHpple *parser = [TFHpple hppleWithHTMLData:data];
NSString *XpathQueryStringTitle = @"//title";
NSArray *nodes = [parser searchWithXPathQuery:XpathQueryStringTitle];
NSMutableArray *dataArray = [[NSMutableArray alloc]initWithCapacity:0];
for (TFHppleElement *element in nodes) {
HtmlData *htmlData = [[HtmlData alloc]init];
[dataArray addObject:htmlData];
htmlData.title = [[element firstChild]content];
htmlTitle = htmlData.title;
htmlTitle = [htmlTitle substringToIndex:6];
htmlTitle = [htmlTitle stringByReplacingOccurrencesOfString:@" " withString:@""];
}
}
(Based on this tutorial: http://www.raywenderlich.com/14172/how-to-parse-html-on-ios)
Now my question is how I can find the second information I need? Should I made another NSString to obtain the second information? Can you help me to solve this problem? Thank you
Solution
I solved my issue by using Firebug. I opened my page with Firefox and I opened Firebug, with this I selected the row where'd the information I need then I clicked on it with right button of the mouse and I choose "Copy Xpath" and I paste this in my app and it's working!
Thank you for your suggestion!
OTHER TIPS
Check with this:
https://github.com/mwaterfall/MWFeedParser
https://github.com/zootreeves/Objective-C-HMTL-Parser
This will provide the HTML Parser for iphone sdk.
More help on:
SO question: memory leaking iPhone sdk?
How to Parse HTML on objectgraph.com
I have successfully used Nolan Waite's HTMLReader project to parse a very complicated HTML5 response easily and reliably.
It's easy to setup and use, I highly recommend it. All the other projects I found are old, unmaintained or are intended to parse strict XHTML / XML.
Here's the example from the README:
#import <HTMLReader/HTMLReader.h>
// Parse a string and find an element.
NSString *markup = @"<p><b>Ahoy there sailor!</b></p>";
HTMLDocument *document = [HTMLDocument documentWithString:markup];
NSLog(@"%@", [document firstNodeMatchingSelector:@"b"].textContent);
// => Ahoy there sailor!
// Wrap one element in another.
HTMLElement *b = [document firstNodeMatchingSelector:@"b"];
NSMutableOrderedSet *children = [b.parentNode mutableChildren];
HTMLElement *wrapper = [[HTMLElement alloc] initWithTagName:@"div"
attributes:@{@"class": @"special"}];
[children insertObject:wrapper atIndex:[children indexOfObject:b]];
b.parentNode = wrapper;
NSLog(@"%@", [document.rootElement serializedFragment]);
// => <html><head></head><body><p><div class="special"> \
<b>Ahoy there sailor!</b></div></p></body></html>
// Load a web page.
NSURL *URL = [NSURL URLWithString:@"https://github.com/nolanw/HTMLReader"];
NSURLSession *session = [NSURLSession sharedSession];
[[session dataTaskWithURL:URL completionHandler:
^(NSData *data, NSURLResponse *response, NSError *error) {
NSString *contentType = nil;
if ([response isKindOfClass:[NSHTTPURLResponse class]]) {
NSDictionary *headers = [(NSHTTPURLResponse *)response allHeaderFields];
contentType = headers[@"Content-Type"];
}
HTMLDocument *home = [HTMLDocument documentWithData:data
contentTypeHeader:contentType];
HTMLElement *div = [home firstNodeMatchingSelector:@".repository-description"];
NSCharacterSet *whitespace = [NSCharacterSet whitespaceAndNewlineCharacterSet];
NSLog(@"%@", [div.textContent stringByTrimmingCharactersInSet:whitespace]);
// => A WHATWG-compliant HTML parser in Objective-C.
}] resume];
