nghttp(1) nghttp2 nghttp(1)
NAME
nghttp - HTTP/2 client
SYNOPSIS
nghttp [OPTIONS]... <URI>...
DESCRIPTION
HTTP/2 client
<URI> Specify URI to access.
OPTIONS
-v, --verbose
Print debug information such as reception and
transmission of frames and name/value pairs. Specifying this
option multiple times increases verbosity.
-n, --null-out
Discard downloaded data.
-O, --remote-name
Save download data in the current directory. The
filename is derived from URI. If URI ends with '/',
'index.html' is used as a filename. Not implemented yet.
-t, --timeout=<DURATION>
Timeout each request after <DURATION>. Set 0 to disable
timeout.
-w, --window-bits=<N>
Sets the stream level initial window size to 2**<N>-1.
-W, --connection-window-bits=<N>
Sets the connection level initial window size to
2**<N>-1.
-a, --get-assets
Download assets such as stylesheets, images and script files
linked from the downloaded resource. Only links whose
origins are the same with the linking resource will be
downloaded. nghttp prioritizes resources using HTTP/2
dependency based priority. The priority order, from highest
to lowest, is html itself, css, javascript and images.
-s, --stat
Print statistics.
-H, --header=<HEADER>
Add a header to the requests. Example: -H':method: PUT'
--trailer=<HEADER>
Add a trailer header to the requests. <HEADER> must not include
pseudo header field (header field name starting with ':'). To
send trailer, one must use -d option to send request body.
Example: --trailer 'foo: bar'.
--cert=<CERT>
Use the specified client certificate file. The file must be
in PEM format.
--key=<KEY>
Use the client private key file. The file must be in PEM
format.
-d, --data=<PATH>
Post FILE to server. If '-' is given, data will be read from
stdin.
-m, --multiply=<N>
Request each URI <N> times. By default, same URI is not
requested twice. This option disables it too.
-u, --upgrade
Perform HTTP Upgrade for HTTP/2. This option is ignored if the
request URI has https scheme. If -d is used, the HTTP upgrade
request is performed with OPTIONS method.
--extpri=<PRI>
Sets RFC 9218 priority of given URI. <PRI> must be the wire
format of priority header field (e.g., "u=3,i"). This
option can be used multiple times, and N-th --extpri
option sets priority of N-th URI in the command line. If the
number of this option is less than the number of URI, the
last option value is repeated. If there is no --extpri
option, urgency is 3, and incremental is false.
-M, --peer-max-concurrent-streams=<N>
Use <N> as SETTINGS_MAX_CONCURRENT_STREAMS value of remote
endpoint as if it is received in SETTINGS frame.
Default: 100
-c, --header-table-size=<SIZE>
Specify decoder header table size. If this option is used
multiple times, and the minimum value among the given values
except for last one is strictly less than the last value,
that minimum value is set in SETTINGS frame payload before
the last value, to simulate multiple header table size
change.
--encoder-header-table-size=<SIZE>
Specify encoder header table size. The decoder (server)
specifies the maximum dynamic table size it accepts. Then
the negotiated dynamic table size is the minimum of this option
value and the value which server specified.
-b, --padding=<N>
Add at most <N> bytes to a frame payload as padding.
Specify 0 to disable padding.
-r, --har=<PATH>
Output HTTP transactions <PATH> in HAR format. If '-' is
given, data is written to stdout.
--color
Force colored log output.
--continuation
Send large header to test CONTINUATION.
--no-content-length
Don't send content-length header field.
--hexdump
Display the incoming traffic in hexadecimal (Canonical
hex+ASCII display). If SSL/TLS is used, decrypted data are
used.
--no-push
Disable server push.
--max-concurrent-streams=<N>
The number of concurrent pushed streams this client
accepts.
--expect-continue
Perform an Expect/Continue handshake: wait to send DATA (up to
a short timeout) until the server sends a 100 Continue
interim response. This option is ignored unless combined with
the -d option.
-y, --no-verify-peer
Suppress warning on server certificate verification
failure.
--ktls Enable ktls.
--version
Display version information and exit.
-h, --help
Display this help and exit.
The <SIZE> argument is an integer and an optional unit (e.g., 10K is 10
* 1024). Units are K, M and G (powers of 1024).
The <DURATION> argument is an integer and an optional unit (e.g., 1s is
1 second and 500ms is 500 milliseconds). Units are h, m, s or ms
(hours, minutes, seconds and milliseconds, respectively). If a unit is
omitted, a second is used as unit.
SEE ALSO
nghttpd(1), nghttpx(1), h2load(1)
AUTHOR
Tatsuhiro Tsujikawa
COPYRIGHT
2012, 2015, 2016, Tatsuhiro Tsujikawa
1.66.0 June 17, 2025 nghttp(1)
nghttp2 1.66.0 - Generated Tue Jun 17 05:50:00 CDT 2025