Using BSD sockets or, if you’re somewhat limited, say you have some RTOS, some simpler TCP stack, like lwIP, you can form the GET/POST request. There are a number of open-source implementations. See the “happyhttp” as a sample ( http://scumways.com/happyhttp/happyhttp.html ). I know, it is C++, not C, but the only thing that is “C++-dependant” … Read more
First make sure if the URL is actually valid (a string, not empty, good syntax), this is quick to check server side. For example, doing this first could save a lot of time: if(!$url || !is_string($url) || ! preg_match(‘/^http(s)?:\/\/[a-z0-9-]+(.[a-z0-9-]+)*(:[0-9]+)?(\/.*)?$/i’, $url)){ return false; } Make sure you only fetch the headers, not the body content: @curl_setopt($ch, … Read more
Cache-Control: no-cache is generally used in a request header (sent from web browser to server) to force validation of the resource in the intermediate proxies. If the client doesn’t send this request to the server, intermediate proxies will return a copy of the content if it is fresh (has not expired according to Expire or … Read more
Serving huge or many auxiliary files with PHP is not exactly what it’s made for. Instead, look at X-accel for nginx, X-Sendfile for Lighttpd or mod_xsendfile for Apache. The initial request gets handled by PHP, but once the download file has been determined it sets a few headers to indicate that the server should handle … Read more
Update: It’s 2019, so I have rewritten this answer for Python 3, following a confused comment from a programmer trying to use the code. The original Python 2 code is now down at the bottom of the answer. There are excellent tools in the Standard Library both for parsing RFC 821 headers, and also for parsing … Read more
To me it looks like the HTTP 1.1 RFC is pretty specific: The Content-Length entity-header field indicates the size of the entity-body, in decimal number of OCTETs, sent to the recipient or, in the case of the HEAD method, the size of the entity-body that would have been sent had the request been a GET.
Yes HTTP RFC2616 available here says: Multiple message-header fields with the same field-name MAY be present in a message if and only if the entire field-value for that header field is defined as a comma-separated list [i.e., #(values)]. It MUST be possible to combine the multiple header fields into one “field-name: field-value” pair, without changing … Read more
I have managed to solve this issue with the help of Vasiliy Baranov from Oracle. Vasiliy wrote to me: Try putting the cookie into java.net.CookieHandler.getDefault() after the WebView is instantiated for the first time and before the call to WebEngine.load, e.g. as follows: WebView webView = new WebView(); URI uri = URI.create(“http://mysite.com”); Map<String, List<String>> headers … Read more
According to the documentation request.META is a “standard Python dictionary containing all available HTTP headers”. If you want to get all the headers you can simply iterate through the dictionary. Which part of your code to do this depends on your exact requirement. Anyplace that has access to request should do. Update I need to … Read more
Use the user agent from $_SERVER[‘HTTP_USER_AGENT’], and for simple detection you can use this script: <?php //Detect special conditions devices $iPod = stripos($_SERVER[‘HTTP_USER_AGENT’],”iPod”); $iPhone = stripos($_SERVER[‘HTTP_USER_AGENT’],”iPhone”); $iPad = stripos($_SERVER[‘HTTP_USER_AGENT’],”iPad”); $Android = stripos($_SERVER[‘HTTP_USER_AGENT’],”Android”); $webOS = stripos($_SERVER[‘HTTP_USER_AGENT’],”webOS”); //do something with this information if( $iPod || $iPhone ){ //browser reported as an iPhone/iPod touch — do something here … Read more