Not an experienced developer and using CodeIgniter for the first time. I'm trying to grab a signed URL for a given MP3 filename stored in S3. This is currently working with the exception of files that contain brackets.
Relevant controller code:
function index ($streamfile) {
// Load S3 client
$this->load->spark('amazon-sdk');
$s3 = $this->awslib->get_s3();
// Define request parameters
$s3bucket = $userdata['s3bucket']; // defined elsewhere
$streamfiletest = ($string)'Crazy_(Remix).mp3';
// Request signed URL
$url = $s3->get_object_url($s3bucket, ***EITHER $streamfiletest or $streamfile***, '5 minutes');
// Fetch status code
$http = new CFRequest($url);
$http->add_header('Content-Type', '');
$http->send_request(true);
$code = $http->get_response_code();
$headers = $http->get_response_header();
// Load the view
$data['filename'] = $url;
$data['debug'] = array(
'file1' => $streamfile,
'file2' => $streamfiletest,
'signed_url' => $url,
'code' => $code,
'headers' => $headers
);
$this->load->view('play', $data);
Relevant view code:
<?php if (isset($debug)) {
echo "DEBUGS:";
echo '<pre>' . print_r($debug, TRUE) . '</pre>';
} ?>
As you can see I either pass $streamfile or $streamfiletest. In the debug I can confirm that both variables are the same string.
When passing $streamfile to the URL request, the URL in the response is incorrect:
DEBUGS:
[file1] => Crazy_(Remix).mp3
[file2] => Crazy_(Remix).mp3
[signed_url] => http://s3-...(removed)/Crazy_%26%2340%3BRemix%26%2341%3B.mp3?AWSAccessKey...
[code] => 404
You can see that the brackets have been strangely encoded %26%2340%3B and therefore I can't find the file in S3.
When passing $streamfiletest however, the response is fine:
DEBUGS:
[file1] => Crazy_(Remix).mp3
[file2] => Crazy_(Remix).mp3
[signed_url] => http://s3-...(removed)/Crazy_%28Remix%29.mp3?AWSAccessKey...
[code] => 200
The brackets are encoded correctly in the signed URL an I get a HTTP 200 from S3.
Any ideas what could be causing this?
In the debug I can confirm that both variables are the same string
Actually, not quite.
If you look closely, it becomes apparent what the url escaped values must mean:
%26%2340%3B %26%2341%3B
& # 40 ; & # 41 ;
Those are numeric html character codes that the browser will display as ( and ) but it does not in fact mean that the two strings have identical content. They only appear to.
The solution, of course, depends on how they are getting transformed that way, and either not doing that, or decoding the numeric character codes.
Try doing the following to decode the url encoded brackets
$data['filename'] = urldecode($url);
This should return the string to its expected format ie with brackets
I am working on some code using Google Maps API. To sum up shortly, I have MySQL database with a table of information used to generate markers on the map. I connected to the database and am using PHP to draw out the necessary attributes and communicate with my Javascript code using XML.
What I'm currently attempting to do is go in the other direction, I'm trying to send a string of information (for example "1,2,3,45,18") from my Javascript code to MySQL to be set as a session parameter (call it #sparam). What is the process behind passing this value to MySQL?
Would I be able to access a MySQL variable through PHP in the same way I can access tables (for the purpose of getting a value back into Javascript)?
I'd appreciate any insight.
Thanks.
EDIT
Maybe I was unclear in my original post. What I'm asking is how would I be able to pass a string to a MySQL session variable, specifically a set of IDs directly related to the IDs in the table of the MySQL database, and then be able to work with these IDs by calling the necessary procedures in MySQL. In turn, the procedures called in MySQL would generate some output, which would then have to be passed back to the Javascript code.
I created a special JSON (JavaScript Object Notation) php pages that I would call from javascript. Then I would parse those JSON responses.
Simple example:
JAVASCRIPT:
function getCheckedUnits() {
jQuery(function($) {
$.ajax( {
url : "page_json.php?action=getsession",
type : "GET",
success : function(data) {
//Get Json and loop over it's data
if (data.length>10){
var jsonData = JSON.parse(data);
$.each(jsonData, function(Idx, Value) {
if (Idx>0){
//get values for each vehicle and then remove it's marker from the map and then add new marker on the map (thereofore update the marker)
c_latitude = Value["lat"];
c_longitude = Value["lon"];
c_name = Value["name"];
c_notes= Value["notes"];
removeMarker(c_name); //remove old marker function
addMarker(c_latitude, c_longitude, c_name); //add current marker function
}
});
}
}
});
});
}
PHP: Here I loop over my arrayList and then create a simple array with values. Then I just output it as a json string
foreach ($listOfCars->arrayList as $key => $value) {
$unit = new fleetUnit();
$unit = $value;
//create array for json output
$data[] = array('lat' => $unit->lat,
'lon' => $unit->lon, 'name' => $unit->name, 'notes' => $unit->notes);
}
echo json_encode($data);
I'm trying to connect with the instagram API, the connection works fine and I am receiving the updates just as described in the API documentation, the issue is that I cannot access to the data send to my callback function.
According to the doc
When someone posts a new photo and it triggers an update of one of your subscriptions, we make a POST request to the callback URL that you defined in the subscription
This is my code :
// check if we have a security challenge
if (isset ($_GET['hub_challenge']))
echo $_GET['hub_challenge'];
else // This is an update
{
// read the content of $_POST
$myString = file_get_contents('php://input');
$answer = json_decode($myString);
// This is not working starting from here
$id = $answer->{'object_id'};
$api = 'https://api.instagram.com/v1/locations/'.$id.'/media/recent?client_secret='.INSTA_CLI_SECRET.'&client_id='.INSTA_CLI_ID;
$response = get_curl($api); //change request path to pull different photos
$images = array();
if($response){
$decode = json_decode($response);
foreach($decode->{'data'} as $item){
// do something with the data here
}
}
}
Displaying the $myString variable I have this result, don't know why it is not decoded to json :(
[{"changed_aspect": "media", "subscription_id": 2468174, "object":
"geography", "object_id": "1518250", "time": 1350044500}]
the get_curl function is working fine when I hardcode my $id.
I guess something is wrong with my $myString, unfortunately the $_POST cvariable is not populated, Any idea what I am missing ?
Looking at the example JSON response included in your question, I can conclude that the object you are trying to talk with is wrapped in an array (hence the [ and ] around it in the JSON string).
You should access it using $answers[0]->object_id.
If that doesn't work, you can always use var_dump to check out the data in one of your variables.
Is there any way I can access the thumbnail picture of any wikipedia page by using an API? I mean the image on the top right side in box. Is there any APIs for that?
You can get the thumbnail of any wikipedia page using prop=pageimages. For example:
http://en.wikipedia.org/w/api.php?action=query&titles=Al-Farabi&prop=pageimages&format=json&pithumbsize=100
And you will get the thumbnail full URL.
http://en.wikipedia.org/w/api.php
Look at prop=images.
It returns an array of image filenames that are used in the parsed page. You then have the option of making another API call to find out the full image URL, e.g.:
action=query&titles=Image:INSERT_EXAMPLE_FILE_NAME_HERE.jpg&prop=imageinfo&iiprop=url
or to calculate the URL via the filename's hash.
Unfortunately, while the array of images returned by prop=images is in the order they are found on the page, the first can not be guaranteed to be the image in the info box because sometimes a page will include an image before the infobox (most of the time icons for metadata about the page: e.g. "this article is locked").
Searching the array of images for the first image that includes the page title is probably the best guess for the infobox image.
This is good way to get the Main Image of a page in wikipedia
http://en.wikipedia.org/w/api.php?action=query&prop=pageimages&format=json&piprop=original&titles=India
Check out the MediaWiki API example for getting the main picture of a wikipedia page: https://www.mediawiki.org/wiki/API:Page_info_in_search_results.
As other's have mentioned, you would use prop=pageimages in your API query.
If you also want the image description, you would use prop=pageimages|pageterms instead in your API query.
You can get the original image using piprop=original. Or you can get a thumbnail image with a specified width/height. For a thumbnail with width/height=600, piprop=thumbnail&pithumbsize=600. If you omit either, the image returned in the API callback will default to a thumbnail with width/height of 50px.
If you are requesting results in JSON format, you should always use formatversion=2 in your API query (i.e., format=json&formatversion=2) because it makes retrieving the image from the query easier.
Original Size Image:
https://en.wikipedia.org/w/api.php?action=query&format=json&formatversion=2&prop=pageimages|pageterms&piprop=original&titles=Albert Einstein
Thumbnail Size (600px width/height) Image:
https://en.wikipedia.org/w/api.php?action=query&format=json&formatversion=2&prop=pageimages|pageterms&piprop=thumbnail&pithumbsize=600&titles=Albert Einstein
Way 1: You can try some query like this:
http://en.wikipedia.org/w/api.php?action=opensearch&limit=5&format=xml&search=italy&namespace=0
in the response, you can see the Image tag.
<Item>
<Text xml:space="preserve">Italy national rugby union team</Text>
<Description xml:space="preserve">
The Italy national rugby union team represent the nation of Italy in the sport of rugby union.
</Description>
<Url xml:space="preserve">
http://en.wikipedia.org/wiki/Italy_national_rugby_union_team
</Url>
<Image source="http://upload.wikimedia.org/wikipedia/en/thumb/4/46/Italy_rugby.png/43px-Italy_rugby.png" width="43" height="50"/>
</Item>
Way 2: use query http://en.wikipedia.org/w/index.php?action=render&title=italy
then you can get a raw html code, you can get the image use something like PHP Simple HTML DOM Parser
http://simplehtmldom.sourceforge.net
I have no time write it to you. just give you some advice, thanks.
I'm sorry for not answering specifically your question about the main image. But here's some code to get a list of all images:
function makeCall($url) {
$curl = curl_init();
curl_setopt($curl, CURLOPT_URL, $url);
curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
return curl_exec($curl);
}
function wikipediaImageUrls($url) {
$imageUrls = array();
$pathComponents = explode('/', parse_url($url, PHP_URL_PATH));
$pageTitle = array_pop($pathComponents);
$imagesQuery = "http://en.wikipedia.org/w/api.php?action=query&titles={$pageTitle}&prop=images&format=json";
$jsonResponse = makeCall($imagesQuery);
$response = json_decode($jsonResponse, true);
$imagesKey = key($response['query']['pages']);
foreach($response['query']['pages'][$imagesKey]['images'] as $imageArray) {
if($imageArray['title'] != 'File:Commons-logo.svg' && $imageArray['title'] != 'File:P vip.svg') {
$title = str_replace('File:', '', $imageArray['title']);
$title = str_replace(' ', '_', $title);
$imageUrlQuery = "http://en.wikipedia.org/w/api.php?action=query&titles=Image:{$title}&prop=imageinfo&iiprop=url&format=json";
$jsonUrlQuery = makeCall($imageUrlQuery);
$urlResponse = json_decode($jsonUrlQuery, true);
$imageKey = key($urlResponse['query']['pages']);
$imageUrls[] = $urlResponse['query']['pages'][$imageKey]['imageinfo'][0]['url'];
}
}
return $imageUrls;
}
print_r(wikipediaImageUrls('http://en.wikipedia.org/wiki/Saturn_%28mythology%29'));
print_r(wikipediaImageUrls('http://en.wikipedia.org/wiki/Hans-Ulrich_Rudel'));
I got this for http://en.wikipedia.org/wiki/Saturn_%28mythology%29:
Array
(
[0] => http://upload.wikimedia.org/wikipedia/commons/1/10/Arch_of_SeptimiusSeverus.jpg
[1] => http://upload.wikimedia.org/wikipedia/commons/8/81/Ivan_Akimov_Saturn_.jpg
[2] => http://upload.wikimedia.org/wikipedia/commons/d/d7/Lucius_Appuleius_Saturninus.jpg
[3] => http://upload.wikimedia.org/wikipedia/commons/2/2c/Polidoro_da_Caravaggio_-_Saturnus-thumb.jpg
[4] => http://upload.wikimedia.org/wikipedia/commons/b/bd/Porta_Maggiore_Alatri.jpg
[5] => http://upload.wikimedia.org/wikipedia/commons/6/6a/She-wolf_suckles_Romulus_and_Remus.jpg
[6] => http://upload.wikimedia.org/wikipedia/commons/4/45/Throne_of_Saturn_Louvre_Ma1662.jpg
)
And for the second URL (http://en.wikipedia.org/wiki/Hans-Ulrich_Rudel):
Array
(
[0] => http://upload.wikimedia.org/wikipedia/commons/e/e9/BmRKEL.jpg
[1] => http://upload.wikimedia.org/wikipedia/commons/3/3f/BmRKELS.jpg
[2] => http://upload.wikimedia.org/wikipedia/commons/2/2c/Bundesarchiv_Bild_101I-655-5976-04%2C_Russland%2C_Sturzkampfbomber_Junkers_Ju_87_G.jpg
[3] => http://upload.wikimedia.org/wikipedia/commons/6/62/Bundeswehr_Kreuz_Black.svg
[4] => http://upload.wikimedia.org/wikipedia/commons/9/99/Flag_of_German_Reich_%281935%E2%80%931945%29.svg
[5] => http://upload.wikimedia.org/wikipedia/en/6/64/HansUlrichRudel.jpeg
[6] => http://upload.wikimedia.org/wikipedia/commons/8/82/Heinkel_He_111_during_the_Battle_of_Britain.jpg
[7] => http://upload.wikimedia.org/wikipedia/commons/6/66/Regulation_WW_II_Underwing_Balkenkreuz.png
)
Note that the URL changed a bit on the 6th element of the second array. It's what #JosephJaber was warning about in his comment above.
Hope this helps someone.
I have written some code that gets main image (full URL) by Wikipedia article title. It's not perfect, but overall I'm very pleased with the results.
The challenge was that when queried for a specific title, Wikipedia returns multiple image filenames (without path). Furthermore, the secondary search (I used the code varatis posted in this thread - thanks!) returns URLs of all images found based on the image filename that was searched, regardless of the original article title. After all this, we may end up with a generic image irrelevant to the search, so we filter those out. The code iterates over filenames and URLs until it finds (hopefully the best) match... a bit complicated, but it works :)
Note on the generic filter: I've been compiling a list of generic image strings for the isGeneric() function, but the list just keeps growing. I am considering maintaining it as a public list - if there is any interest let me know.
Pre:
protected static $baseurl = "http://en.wikipedia.org/w/api.php";
Main function - get image URL from title:
public static function getImageURL($title)
{
$images = self::getImageFilenameObj($title); // returns JSON object
if (!$images) return '';
foreach ($images as $image)
{
// get object of image URL for given filename
$imgjson = self::getFileURLObj($image->title);
// return first image match
foreach ($imgjson as $img)
{
// get URL for image
$url = $img->imageinfo[0]->url;
// no image found
if (!$url) continue;
// filter generic images
if (self::isGeneric($url)) continue;
// match found
return $url;
}
}
// match not found
return '';
}
== The following functions are called by the main function above ==
Get JSON object (filenames) by title:
public static function getImageFilenameObj($title)
{
try // see if page has images
{
// get image file name
$json = json_decode(
self::retrieveInfo(
self::$baseurl . '?action=query&titles=' .
urlencode($title) . '&prop=images&format=json'
))->query->pages;
/** The foreach is only to get around
* the fact that we don't have the id.
*/
foreach ($json as $id) { return $id->images; }
}
catch(exception $e) // no images
{
return NULL;
}
}
Get JSON object (URLs) by filename:
public static function getFileURLObj($filename)
{
try // resolve URL from filename
{
return json_decode(
self::retrieveInfo(
self::$baseurl . '?action=query&titles=' .
urlencode($filename) . '&prop=imageinfo&iiprop=url&format=json'
))->query->pages;
}
catch(exception $e) // no URLs
{
return NULL;
}
}
Filter out generic images:
public static function isGeneric($url)
{
$generic_strings = array(
'_gray.svg',
'icon',
'Commons-logo.svg',
'Ambox',
'Text_document_with_red_question_mark.svg',
'Question_book-new.svg',
'Canadese_kano',
'Wiki_letter_',
'Edit-clear.svg',
'WPanthroponymy',
'Compass_rose_pale',
'Us-actor.svg',
'voting_box',
'Crystal_',
'transportation_inv',
'arrow.svg',
'Quill_and_ink-US.svg',
'Decrease2.svg',
'Rating-',
'template',
'Nuvola_apps_',
'Mergefrom.svg',
'Portal-',
'Translation_to_',
'/School.svg',
'arrow',
'Symbol_',
'stub',
'Unbalanced_scales.svg',
'-logo.',
'P_vip.svg',
'Books-aj.svg_aj_ashton_01.svg',
'Film',
'/Gnome-',
'cap.svg',
'Missing',
'silhouette',
'Star_empty.svg',
'Music_film_clapperboard.svg',
'IPA_Unicode',
'symbol',
'_highlighting_',
'pictogram',
'Red_pog.svg',
'_medal_with_cup',
'_balloon',
'Feature',
'Aiga_'
);
foreach ($generic_strings as $str)
{
if (stripos($url, $str) !== false) return true;
}
return false;
}
Comments welcome.
Lets take Example of Page http://en.wikipedia.org/wiki/index.html?curid=57570
to get Main Pic
Check out
prop=pageprops
action=query&pageids=57570&prop=pageprops&format=json
Results Page Data Eg.
{ "pages" : { "57570":{
"pageid":57570,
"ns":0,
"title":"Sachin Tendulkar",
"pageprops" : {
"defaultsort":"Tendulkar,Sachin",
"page_image":"Sachin_at_Castrol_Golden_Spanner_Awards_(crop).jpg",
"wikibase_item":"Q9488"
}
}
}
}}
We get main Pic file name this result as
** (wikiId).pageprops.page_image = Sachin_at_Castrol_Golden_Spanner_Awards_(crop).jpg**
Now as we have Image file name we will have to make another Api Call to get full image path from file name as follows
action=query&titles=Image:INSERT_EXAMPLE_FILE_NAME_HERE.jpg&prop=imageinfo&iiprop=url
Eg.
action=query&titles=Image:Sachin_at_Castrol_Golden_Spanner_Awards_(crop).jpg&prop=imageinfo&iiprop=url
Returns Array of Image Data having url in it as
http://upload.wikimedia.org/wikipedia/commons/3/35/Sachin_at_Castrol_Golden_Spanner_Awards_%28crop%29.jpg
I there is a way to reliably get a main image for a wikipedia page - the Extension called PageImages
The PageImages extension collects information about images used on a page.
Its aim is to return the single most appropriate thumbnail associated
with an article, attempting to return only meaningful images, e.g. not
those from maintenance templates, stubs or flag icons. Currently it
uses the first non-meaningless image used in the page.
https://www.mediawiki.org/wiki/Extension:PageImages
Just add the prop pageimages to your API Query:
/w/api.php?action=query&prop=pageimages&titles=Somepage&format=xml
This reliably filters out annoying default images and prevents you from having to filter them yourself! The extension is installed on all the main wikipedia pages...
Like Anuraj mentioned, the pageimages parameter is it. Look at the following url that'll bring about some nifty stuff:
https://en.wikipedia.org/w/api.php?action=query&prop=info|extracts|pageimages|images&inprop=url&exsentences=1&titles=india
Her are some interesting parameters:
The two parameters extracts and exsentences gives you a short
description you can use. (exsentences is the number of sentences you want to include in the excerpt)
The info and the inprop=url parameters gives you the url of the page
The prop property has multiple parameters separated by a bar symbol
And if you insert the format=json in there, it is even better
See this related question on an API for Wikipedia. However, I would not know if it is possible to retrieve the thumbnail picture through an API.
You can also consider just parsing the web page to find the image URL, and retrieve the image that way.
Here is my list of XPaths I have found work for 95 percent of articles. the main ones are 1, 2 3 and 4. A lot of articles are not formatted correctly and these would be edge cases:
You can use a DOM parsing lib to fetch image using the XPath.
static NSString *kWikipediaImageXPath2 = #"//*[#id=\"mw-content-text\"]/div[1]/div/table/tr[2]/td/a/img";
static NSString *kWikipediaImageXPath3 = #"//*[#id=\"mw-content-text\"]/div[1]/table/tr[1]/td/a/img";
static NSString *kWikipediaImageXPath1 = #"//*[#id=\"mw-content-text\"]/div[1]/table/tr[2]/td/a/img";
static NSString *kWikipediaImageXPath4 = #"//*[#id=\"mw-content-text\"]/div[2]/table/tr[2]/td/a/img";
static NSString *kWikipediaImageXPath5 = #"//*[#id=\"mw-content-text\"]/div[1]/table/tr[2]/td/p/a/img";
static NSString *kWikipediaImageXPath6 = #"//*[#id=\"mw-content-text\"]/div[1]/table/tr[2]/td/div/div/a/img";
static NSString *kWikipediaImageXPath7 = #"//*[#id=\"mw-content-text\"]/div[1]/table/tr[1]/td/div/div/a/img";
I used a ObjC wrapper called Hpple around libxml2.2 to pull out the image url. Hope this helps
You can also use cocoa Pod called SDWebImage
Code sample (remember to also add import SDWebImage):
func requestInfo(flowerName: String) {
let parameters : [String:String] = [
"format" : "json",
"action" : "query",
"prop" : "extracts|pageimages",//pageimages allows fetch imagePath
"exintro" : "",
"explaintext" : "",
"titles" : flowerName,
"indexpageids" : "",
"redirects" : "1",
"pithumbsize" : "500"//specify image size in px
]
AF.request(wikipediaURL, method: .get, parameters: parameters).responseJSON { (response) in
switch response.result {
case .success(let value):
print("Got the wikipedia info.")
print(response)
let flowerJSON : JSON = JSON(response.value!)
let pageid = flowerJSON["query"]["pageids"][0].stringValue
let flowerDescription = flowerJSON["query"]["pages"][pageid]["extract"].stringValue
let flowerImageURL = flowerJSON["query"]["pages"][pageid]["thumbnail"]["source"].stringValue //fetching Image URL
self.wikiInfoLabel.text = flowerDescription
self.imageView.sd_setImage(with: URL(string : flowerImageURL))//imageView updated with Wiki Image
case .failure(let error):
print(error)
}
}
}
I think not, but you can capture the image using a link parser HTML documents
how do i get this json data in android
this data is in localhost. I must fetch this data using URL and display in listview in android.Can any one help in coding plz
[
{
"id":"111114",
"name":"Prandar"
},
{
"id":"111115",
"name":"Catmilkend"
},
{
"id":"111110",
"name":"Allan"
},
{
"id":"111111",
"name":"Aircornal"
},
{
"id":"111112",
"name":"Allaxander"
},
{
"id":"111113",
"name":"AppleMacro"
}
]
This is a very common need, but involves several independent steps which could easily be their own StackOverflow question.
1) in a file named info.php you will create the JSON string to return to requests:
<?php
// this may come from a database
$info = array ('id' => '101',
'name'=> 'bill'
)
echo json_encode($info); // returns {"id":'101',"name": "bill"}
?>
2) Send a http GET request to myserver.com/info.php and capture the string response.
http://w3mentor.com/learn/java/android-development/android-http-services/example-of-http-get-request-using-httpclient-in-android/
3) Then parse the JSON into objects or dictionary array with a JSON framework.
http://www.jondev.net/articles/Android_JSON_Parser_Example
4) Use a ListView in Android to display it.
http://developer.android.com/resources/tutorials/views/hello-listview.html