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The HTTP / 1. 1 header specification for a HTML document must label an appropriate encoding in the Content-Type header, missing < tt > charset =</ tt > parameter results in acceptance of ISO-8859-1 ( so HTTP / 1. 1 formally does not offer such option as an unspecified character encoding ), and this specification supersedes all HTML ( or XHTML ) meta element ones.
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HTTP and /
Due to widespread and persistent ignorance of HTTP < tt > charset =</ tt > over the Internet ( at its server side ), WWW Consortium disappointed in HTTP / 1. 1 ’ s strict approach and encourages browser developers to use some fixes in violation of RFC 2616.
The " Content-Encoding "/" Accept-Encoding " and " Transfer-Encoding "/" TE " headers in HTTP / 1. 1 allow clients to optionally receive compressed HTTP responses and ( less commonly ) to send compressed requests.
The specification for HTTP / 1. 1 ( RFC 2616 ) specifies three compression methods: " gzip " ( RFC 1952 ; the content wrapped in a gzip stream ), " deflate " ( RFC 1950 ; the content wrapped in a zlib-formatted stream ), and " compress " ( explained in RFC 2616 section 3. 5 as ' The encoding format produced by the common UNIX file compression program " compress ".
The standards development of HTTP was coordinated by the Internet Engineering Task Force ( IETF ) and the World Wide Web Consortium ( W3C ), culminating in the publication of a series of Requests for Comments ( RFCs ), most notably RFC 2616 ( June 1999 ), which defines HTTP / 1. 1, the version of HTTP in common use.
HTTP / 1. 1 is a revision of the original HTTP ( HTTP / 1. 0 ).
In HTTP / 1. 0 a separate connection to the same server is made for every resource request.
HTTP / 1. 1 can reuse a connection multiple times to download images, scripts, stylesheets et cetera after the page has been delivered.
HTTP / 1. 1 communications therefore experience less latency as the establishment of TCP connections presents considerable overhead.
The HTTP WG planned to publish new standards in December 1995 and the support for pre-standard HTTP / 1. 1 based on the then developing RFC 2068 ( called HTTP-NG ) was rapidly adopted by the major browser developers in early 1996.
By March 1996, pre-standard HTTP / 1. 1 was supported in Arena, Netscape 2. 0, Netscape Navigator Gold 2. 01, Mosaic 2. 7, Lynx 2. 5, and in Internet Explorer 2. 0.
That same web hosting company reported that by June 1996, 65 % of all browsers accessing their servers were HTTP / 1. 1 compliant.
HTTP and .
The Apache Software Foundation ( ASF ) is a non-profit corporation ( classified as 501 ( c )( 3 ) in the United States ) to support Apache software projects, including the Apache HTTP Server.
Software standard organizations like the W3C, IETF develop software standards so that most software can interoperate through standards such as XML, HTML, HTTP or FTP.
This method gives the HTTP server a convenient way to alter document's encoding according to content negotiation ; certain HTTP server software can do it, for example Apache with the module mod_charset_lite.
< tt >< meta http-equiv =" Content-Type "></ tt > may be interpreted directly by a browser, like an ordinary HTML tag, or it may be used by the HTTP server to generate corresponding headers when it serves the document.
Many business applications being written today use the client – server model, as do the Internet's main application protocols, such as HTTP, SMTP, Telnet, and DNS.
Both support FTP and HTTP and can work through firewalls and proxies.
For HTTP access the application gateway is called a web-proxy or just a proxy.
The two techniques can be used together with the packet filter monitoring a link until it sees an HTTP connection starting to an IP address that has content that needs filtering.
In the case of HTTP PUT or POSTs, the user-submitted data is provided to the program via the standard input.
While Freenet provides an HTTP interface for browsing freesites, it is not a proxy for the World Wide Web ; Freenet can only be used to access content that has been previously inserted into the Freenet network.
The Freenet file sharing network stores documents and allows them to be retrieved later by an associated key, as is now possible with protocols such as HTTP.
Internet Security Systems was widely criticized for allowing less than eight hours before disclosing details of a vulnerability in the Apache HTTP Server.
The client connects to one of these push proxies using a HTTP request and the proxy sends a push request to leaf on behalf of the client.
File transfers are handled using HTTP.
HTTP and header
First, the web server can include the character encoding or "" in the Hypertext Transfer Protocol ( HTTP ) header, which would typically look like this:
Dave Raggett led the HTTP Working Group ( HTTP WG ) in 1995 and wanted to expand the protocol with extended operations, extended negotiation, richer meta-information, tied with a security protocol which became more efficient by adding additional methods and header fields.
There are three methods of establishing a secure HTTP connection: HTTP Secure, Secure Hypertext Transfer Protocol and the HTTP / 1. 1 Upgrade header.
The meta element has two uses: either to emulate the use of the HTTP response header, or to embed additional metadata within the HTML document.
is used to emulate the HTTP header.
This specifies that the page should be served with an HTTP header called ' Content-Type ' that has a value ' text / html '.
Instead, the user agent emulates the behavior for some HTTP headers as if they had been sent in the response header itself.
The header in HTTP responses and the field in HTTP cookies express time-to-live in this way.
When a document is transmitted via a MIME message or a transport that uses MIME content types such as an HTTP response, the message may signal the encoding via a Content-Type header, such as.
Squid has some features that can help anonymize connections, such as disabling or changing specific header fields in a client's HTTP requests.
A way to adapt the reporting on the source server is to use the X-Forwarded-For HTTP header reported by the reverse proxy, to get the real client's IP address.
His web browser communicates with the proxy in exactly the same way it would with the target server — it sends a standard HTTP request header.
The HTTP proxy reads the request and looks for the host header.
It was one of the first clients to make use of the then-new HTTP header to support this feature.
More specifically it means setting the < tt > Host </ tt > HTTP header.
This is done by delivering content based on the IP addresses or the User-Agent HTTP header of the user requesting the page.
A better method of content negotiation is to examine the client's HTTP header.
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