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mod_reqtimeout - Apache HTTP Server Version 2.4









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Apache HTTP Server Version 2.4



Apache > HTTP Server > Documentation > Version 2.4 > Modules

Apache Module mod_reqtimeout

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Description:Set timeout and minimum data rate for receiving requests

Status:Extension
ModuleIdentifier:reqtimeout_module
SourceFile:mod_reqtimeout.c
Compatibility:Available in Apache HTTPD 2.2.15 and later

Topics

 Examples
Directives

 RequestReadTimeout

Bugfix checklisthttpd changelogKnown issuesReport a bugSee also

Comments


Examples

    
      
        Allow 10 seconds to receive the request including the headers and
        30 seconds for receiving the request body:

        RequestReadTimeout header=10 body=30

      

      
        Allow at least 10 seconds to receive the request body.
        If the client sends data, increase the timeout by 1 second for every
        1000 bytes received, with no upper limit for the timeout (except for
        the limit given indirectly by
        LimitRequestBody):

        RequestReadTimeout body=10,MinRate=1000

      

      
        Allow at least 10 seconds to receive the request including the headers.
        If the client sends data, increase the timeout by 1 second for every
        500 bytes received. But do not allow more than 30 seconds for the
        request including the headers:

        RequestReadTimeout header=10-30,MinRate=500

      

      
        Usually, a server should have both header and body timeouts configured.
        If a common configuration is used for http and https virtual hosts, the
        timeouts should not be set too low:

        RequestReadTimeout header=20-40,MinRate=500 body=20,MinRate=500

      

    


RequestReadTimeout Directive

Description:Set timeout values for receiving request headers and body from client.

Syntax:RequestReadTimeout
[header=timeout[-maxtimeout][,MinRate=rate]
[body=timeout[-maxtimeout][,MinRate=rate]

Default:header=20-40,MinRate=500 body=20,MinRate=500
Context:server config, virtual host
Status:Extension
Module:mod_reqtimeout
Compatibility:Available in version 2.2.15 and later; defaulted to disabled in
version 2.3.14 and earlier.

    This directive can set various timeouts for receiving the request headers
    and the request body from the client. If the client fails to send headers or
    body within the configured time, a 408 REQUEST TIME OUT error
    is sent.

    For SSL virtual hosts, the header timeout values include the time needed
    to do the initial SSL handshake.  If the user's browser is configured to
    query certificate revocation lists and the CRL server is not reachable, the
    initial SSL handshake may take a significant time until the browser gives up
    waiting for the CRL.  Therefore the header timeout values should not be set
    to very low values for SSL virtual hosts.
    The body timeout values include the time needed for SSL renegotiation
    (if necessary).

    When an AcceptFilter is in use
    (usually the case on Linux and FreeBSD), the socket is not sent to the
    server process before at least one byte (or the whole request for
    httpready) is received. The header timeout configured with
    RequestReadTimeout is only effective after the server process has
    received the socket.

    For each of the two timeout types (header or body), there are three ways
    to specify the timeout:
    

    

    Fixed timeout value:

    type=timeout

    The time in seconds allowed for reading all of the request headers or
    body, respectively. A value of 0 means no limit.
    

    Disable module for a vhost::

    header=0 body=0

    This disables mod_reqtimeout completely.
    

    Timeout value that is increased when data is
    received:
    
    type=timeout,MinRate=data_rate
    

    Same as above, but whenever data is received, the timeout value is
    increased according to the specified minimum data rate (in bytes per
    second).
    

    Timeout value that is increased when data is received, with an
    upper bound:
    
    type=timeout-maxtimeout,MinRate=data_rate
    

    Same as above, but the timeout will not be increased above the second
    value of the specified timeout range.
    

    





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