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.. _settings outgoing:
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=============
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``outgoing:``
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=============
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Communication with search engines.
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.. code:: yaml
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outgoing:
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request_timeout: 2.0 # default timeout in seconds, can be override by engine
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max_request_timeout: 10.0 # the maximum timeout in seconds
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useragent_suffix: "" # information like an email address to the administrator
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pool_connections: 100 # Maximum number of allowable connections, or null
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# for no limits. The default is 100.
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pool_maxsize: 10 # Number of allowable keep-alive connections, or null
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# to always allow. The default is 10.
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enable_http2: true # See https://www.python-httpx.org/http2/
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# uncomment below section if you want to use a custom server certificate
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# see https://www.python-httpx.org/advanced/#changing-the-verification-defaults
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# and https://www.python-httpx.org/compatibility/#ssl-configuration
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# verify: ~/.mitmproxy/mitmproxy-ca-cert.cer
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#
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# uncomment below section if you want to use a proxyq see: SOCKS proxies
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# https://2.python-requests.org/en/latest/user/advanced/#proxies
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# are also supported: see
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# https://2.python-requests.org/en/latest/user/advanced/#socks
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#
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# proxies:
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# all://:
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# - http://proxy1:8080
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# - http://proxy2:8080
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#
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# using_tor_proxy: true
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#
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# Extra seconds to add in order to account for the time taken by the proxy
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#
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# extra_proxy_timeout: 10.0
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#
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``request_timeout`` :
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Global timeout of the requests made to others engines in seconds. A bigger
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timeout will allow to wait for answers from slow engines, but in consequence
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will slow SearXNG reactivity (the result page may take the time specified in the
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timeout to load). Can be override by ``timeout`` in the :ref:`settings engine`.
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``useragent_suffix`` :
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Suffix to the user-agent SearXNG uses to send requests to others engines. If an
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engine wish to block you, a contact info here may be useful to avoid that.
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.. _Pool limit configuration: https://www.python-httpx.org/advanced/#pool-limit-configuration
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``pool_maxsize``:
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Number of allowable keep-alive connections, or ``null`` to always allow. The
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default is 10. See ``max_keepalive_connections`` `Pool limit configuration`_.
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``pool_connections`` :
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Maximum number of allowable connections, or ``null`` # for no limits. The
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default is 100. See ``max_connections`` `Pool limit configuration`_.
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``keepalive_expiry`` :
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Number of seconds to keep a connection in the pool. By default 5.0 seconds.
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See ``keepalive_expiry`` `Pool limit configuration`_.
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.. _httpx proxies: https://www.python-httpx.org/advanced/#http-proxying
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``proxies`` :
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Define one or more proxies you wish to use, see `httpx proxies`_.
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If there are more than one proxy for one protocol (http, https),
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requests to the engines are distributed in a round-robin fashion.
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``source_ips`` :
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If you use multiple network interfaces, define from which IP the requests must
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be made. Example:
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* ``0.0.0.0`` any local IPv4 address.
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* ``::`` any local IPv6 address.
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* ``192.168.0.1``
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* ``[ 192.168.0.1, 192.168.0.2 ]`` these two specific IP addresses
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* ``fe80::60a2:1691:e5a2:ee1f``
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* ``fe80::60a2:1691:e5a2:ee1f/126`` all IP addresses in this network.
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* ``[ 192.168.0.1, fe80::/126 ]``
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``retries`` :
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Number of retry in case of an HTTP error. On each retry, SearXNG uses an
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different proxy and source ip.
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``enable_http2`` :
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Enable by default. Set to ``false`` to disable HTTP/2.
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.. _httpx verification defaults: https://www.python-httpx.org/advanced/#changing-the-verification-defaults
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.. _httpx ssl configuration: https://www.python-httpx.org/compatibility/#ssl-configuration
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``verify``: : ``$SSL_CERT_FILE``, ``$SSL_CERT_DIR``
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Allow to specify a path to certificate.
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see `httpx verification defaults`_.
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In addition to ``verify``, SearXNG supports the ``$SSL_CERT_FILE`` (for a file) and
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``$SSL_CERT_DIR`` (for a directory) OpenSSL variables.
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see `httpx ssl configuration`_.
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``max_redirects`` :
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30 by default. Maximum redirect before it is an error.
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``using_tor_proxy`` :
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Using tor proxy (``true``) or not (``false``) for all engines. The default is
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``false`` and can be overwritten in the :ref:`settings engine`
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