http-headers

I want to upload a video direct to Youtube from my server for which I am using PHP curl. I need this request format: POST /feeds/api/users/default/uploads HTTP/1.1 Host: uploads.gdata.youtube.com Authorization: Bearer ACCESS_TOKEN GData-Version: 2 X-GData-Key: key=adf15ee97731bca89da876c...a8dc Slug: video-test.mp4 Content-Type: multipart/related; boundary="f93dcbA3" Content-Length: 1941255 Connection: close --f93dcbA3 Content-Type: application/atom+xml; charset=UTF-8 <?xml version="1.0"?> <entry xmlns="http://www.w3.org/2005/Atom" xmlns:media="http://search.yahoo.com/mrss/" xmlns:yt="http:/

I want to add a header ( Cache-control ) in nginx only if it is not set. I need to increase cache time in some case via the header in nginx. Stefan Kögl You can use map to populate a variable $cachecontrol . If $http_cache_control (the header from the client) is empty, set a custom value. Otherwise (default) reuse the value from the client. map $http_cache_control $cachecontrol { default $http_cache_control; "" "public, max-age=31536000"; } Afterwards you can use that variable to send the upstream header. proxy_set_header X-Request-ID $cachecontrol; For the follow-up question from jmcollin92 ,

Using PHP how can I accurately test that a remote website supports the "If-Modified-Since" HTTP header. From what I have read, if the remote file you GET has been modified since the date specified in the header request - it should return a 200 OK status. If it hasn't been modified, it should return a 304 Not Modified. Therefore my question is, what if the server doesn't support "If-Modified-Since" but still returns a 200 OK? There are a few tools out there that check if your website supports "If-Modified-Since" so I guess I'm asking how they work. Edit: I have performed some testing using Curl

Recently we've been looking at a few exceptions captured in our Stack Overflow logs and have discovered an issue for Safari users. I noticed this HTTP header in one of the exceptions we have captured: HTTP_X_PURPOSE preview Does anyone know what action triggers this header or the meaning of HTTP_X_PURPOSE? Martin Sutherland The "X-Purpose: preview" header is definitely a Safari 4 top sites thing. The Top Sites page tries to show a live-ish thumbnail of the favourite pages. If favourite page is open in a tab, it grabs a thumbnail from the current version of the page. If a page is not available

Our environment requires the use of an outbound proxy for offsite services. Normally this isn't a problem. In this case with Twilio, the extra header returned breaks the client. Outgoing headers: POST /2010-04-01/Accounts/FOO/SMS/Messages.json HTTP/1.1 Authorization: Basic FOO== User-Agent: twilio-php/3.10.0 Host: api.twilio.com Accept: */* Accept-Charset: utf-8 Content-Type: application/x-www-form-urlencoded Content-Length: 108 Response Headers: HTTP/1.0 200 Connection established HTTP/1.1 201 Created Server: nginx Date: Thu, 06 Jun 2013 14:39:24 GMT Content-Type: application/json; charset

After studying HTTP/1.1 standard , specifically page 31 and related I came to conclusion that any 8-bit octet can be present in HTTP header value. I.e. any character with code from [0,255] range. And yet HTTP servers I tried refuse to take anything with code > 127 (or most US-ASCII non-printable chars). Here is dried out excerpt of grammar used in standard: message-header = field-name ":" [ field-value ] field-name = token field-value = *( field-content | LWS ) field-content = <the OCTETs making up the field-value and consisting of either *TEXT or combinations of token, separators, and quoted

I've been looking around and am quite surprised that there seems to be no means by which one can parse headers generically in libcurl (which seems to be the canonical C library for http these days). The closest thing I've found was a mailing list post where someone suggested someone else search through the mailing list archives. The only facility that is provided by libcurl via setopt is CURLOPT_HEADERFUNCTION which will feed the header responses a single line at a time. This seems entirely too primitive considering headers can span multiple lines . Ideally this should be done once correctly