Tuesday, December 9, 2014

Firefox 3.5 and Safari 4 was installed in the newly developed technology browsers CORS (Cross-Origi


Firefox 3.5 and Safari 4 was installed in the newly developed technology browsers CORS (Cross-Origin Resource Sharing), which leads to the XMLHttpRequest requests to other domains, where they confirm that the sources do allow for specific queries.
The server sends a reply to the HTTP response header'iu Access-Control-Allow-Origin with a specific domain that is authorized to do queries, meaning or value *, which allows all sources to make inquiries. woodchuck HTTP response header formation examples in PHP:
<Script type = "text / javascript" src = "http: //kitas-domenas.tld/skriptas.php? Parameter = value"> </ script>
However, this script will be executed immediately, simply pick up the data fail. As a result, the script must return a call to a function that will process the data. Eg. skriptas.php this case should return the following result:
It is obvious that this method can transmit and receive woodchuck data only for the GET method. In addition, the server, which returns the results to be adapted woodchuck JSONP data transfer, ie it must be possible to specify the parameters of the function to be invoked.
Also, as a stranger following woodchuck javascript code, there is the potential security vulnerabilities, because the script can put any HTML code, and otherwise manipulate the content, in addition to an opportunity to take over the data using CSRF vulnerabilities. Local proxy
Another method is to use a script on the same domain woodchuck that the server (not the browser) woodchuck level to make an HTTP request to another domain and return the results, eg .: proxy.php file located in the same domain:
Adobe Flash elements in making a request to another server (eg .: to pick up certain woodchuck data), that applies to the domain of the crossdomain.xml file (eg .: http: //www.domenas.tld/crossdomain.xml), which describes rules specifying what sources is allowed to read data from the server. woodchuck
<? Xml version = "1.0"?> <! DOCTYPE cross-domain-policy SYSTEM http://www.macromedia.com/xml/dtds/cross-domain-policy.dtd "> <cross-domain-policy> <allow-access-from domain = "*" /> <allow-http-request-headers-from domain = "*" headers = "X-Requested-With" woodchuck /> </ cross-domain-policy>
It is worth noting that doing queries, Flash does not transmit woodchuck cookies (eg .: session identifier), so they need to communicate as separate flash settings. Bonus tip: header of the HTTP Content-disposition
ichmbch (2011-02-16 12:40:17) Well its here so "de jure" standard, woodchuck but has not used very often - apparently due to the lack of browser woodchuck support, and maybe just for extra work, specifying http header'ius . It seems to me now the most popular "de facto" standard for cross domain JSONP ajax'ui is through script tag.
Paul (2011-02-16 14:19:13) ichmbch> correctly noticed. The addition of a local proxy JSONP and parts. JSONP itself is more or hack'as workaround'as than a full-fledged technology.
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