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HTTP headers | Trailer

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The HTTP Trailer header is a response header that indicates the given set of header fields is present in the trailer of a message encoded with chunked transfer-coding and allows the sender to include additional fields at the end of chunked messages in order to supply metadata. Syntax:
Trailer: header-names
Directives:
  • header-names: It is a set of header fields that are present in the trailer of a message encoded with chunked transfer-coding.
Examples:
  • In this example, the header that is being used is Max-Forwards which is a request modifier.
    Trailer: Max-Forwards
  • In this example the header that is being used is the Host header which is a routing header.
    Trailer: Host
  • In this example Trailer header with a large amount of data from a database query, which is a chunked response. The Expires header is used in this example.
    HTTP/1.0 200 OK 
    Content-Type: text/plain 
    Transfer-Encoding: chunked
    Trailer: Expires
    
    0\r\n
    Mozilla\r\n 
    7\r\n
    Developer\r\n
    9\r\n
    Network\r\n
    0\r\n 
    \r\n
Supported Browsers: The browsers compatible with HTTP Trailer header are listed below:
  • Google Chrome
  • Internet Explorer
  • Firefox
  • Opera
  • Safari

Last Updated : 07 Nov, 2019
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