The current state of the Retry-After header The implementation of the Retry-After header in clients and servers has changed a bit in the recent years since the original posting of this question. So I thought I’d provide an updated answer. First off, RFC 2616, section 14.37 Retry-After states: The Retry-After response-header field can be used … Read more
I’m pretty sure you don’t add the mime type as a JPEG on file downloads: header(‘Content-Type: image/png’); These headers have never failed me: $quoted = sprintf(‘”%s”‘, addcslashes(basename($file), ‘”\\’)); $size = filesize($file); header(‘Content-Description: File Transfer’); header(‘Content-Type: application/octet-stream’); header(‘Content-Disposition: attachment; filename=” . $quoted); header(“Content-Transfer-Encoding: binary’); header(‘Connection: Keep-Alive’); header(‘Expires: 0’); header(‘Cache-Control: must-revalidate, post-check=0, pre-check=0’); header(‘Pragma: public’); header(‘Content-Length: ‘ … Read more
Yes, assuming the HTTP server you’re talking to supports/allows this: public long GetFileSize(string url) { long result = -1; System.Net.WebRequest req = System.Net.WebRequest.Create(url); req.Method = “HEAD”; using (System.Net.WebResponse resp = req.GetResponse()) { if (long.TryParse(resp.Headers.Get(“Content-Length”), out long ContentLength)) { result = ContentLength; } } return result; } If using the HEAD method is not allowed, or … Read more
The variables in $_SERVER are not really part of PHP, which is why you won’t find them in the PHP documentation. They are prepared by the Web server which passes them on to the scripting language. As far as I know, the X-Requested-With is sent by the Ajax functions of most major Frameworks but not … Read more
406 is returned by the server when it can’t respond based on accepting the request headers (ie they have an Accept header which states they only want XML). 415 is returned by the server when the entity sent in a request (content in a POST or PUT) has an unsupported mediatype (i.e. they sent XML). … Read more
a) If the server includes this header: Cache-Control “max-age=3600, must-revalidate” it is telling both client caches and proxy caches that once the content is stale (older than 3600 seconds) they must revalidate at the origin server before they can serve the content. This should be the default behavior of caching systems, but the must-revalidate directive … Read more
There are two ways to download a file where the HTTP request requires that a header be set. The credit for the first goes to @guest271314, and credit for the second goes to @dandavis. The first method is to use the HTML5 File API to create a temporary local file, and the second is to … Read more
In case you have no file extension: location ~ something { default_type application/xml; } Nginx docs for default_type In case you are setting up let’s encrypt certificate with a client which creates http server: How to use golang lego let’s encrypt client behind nginx?
The PHP Manual has this example: <?php // open the file in a binary mode $name=”./img/ok.png”; $fp = fopen($name, ‘rb’); // send the right headers header(“Content-Type: image/png”); header(“Content-Length: ” . filesize($name)); // dump the picture and stop the script fpassthru($fp); exit; ?> The important points is that you must send a Content-Type header. Also, you … Read more
pattern.matcher(input) always creates a new matcher, so you’d need to call matches() again. Try: Matcher m = responseCodePattern.matcher(firstHeader); m.matches(); m.groupCount(); m.group(0); //must call matches() first …