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http.1
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http.1
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.\" Copyright (c) 1985, 1989, 1990, 1993
.\" The Regents of the University of California. All rights reserved.
.\"
.\" Redistribution and use in source and binary forms, with or without
.\" modification, are permitted provided that the following conditions
.\" are met:
.\" 1. Redistributions of source code must retain the above copyright
.\" notice, this list of conditions and the following disclaimer.
.\" 2. Redistributions in binary form must reproduce the above copyright
.\" notice, this list of conditions and the following disclaimer in the
.\" documentation and/or other materials provided with the distribution.
.\" 3. Neither the name of the University nor the names of its contributors
.\" may be used to endorse or promote products derived from this software
.\" without specific prior written permission.
.\"
.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
.\" SUCH DAMAGE.
.\"
.\" @(#)ftp.1 8.3 (Berkeley) 10/9/94
.\"
.\" Copyright (c) 2015 Sunil Nimmagadda <sunil@nimmagadda.net>
.\"
.\" Permission to use, copy, modify, and distribute this software for any
.\" purpose with or without fee is hereby granted, provided that the above
.\" copyright notice and this permission notice appear in all copies.
.\"
.\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
.\" WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
.\" MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
.\" ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
.\" WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
.\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
.\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
.\"
.Dd $Mdocdate: August 13 2015 $
.Dt HTTP 1
.Os
.Sh NAME
.Nm http
.Nd HTTP file transfer program
.Sh SYNOPSIS
.Nm
.Op Fl C
.Op Fl o Ar output
.Op Fl P Ar port
.Op Fl S Ar tls_options
.Op Fl U Ar useragent
.Op Fl V
.Ar ...
.Sh DESCRIPTION
.Nm
allows a user to transfer files from a remote HTTP(S) or FTP server.
.Pp
The options are as follows:
.Bl -tag -width Ds
.It Fl C
Continue a previously interrupted file transfer.
.Nm
will continue transferring from an offset equal to the length of file.
.Pp
Resuming HTTP(S) transfers are only supported
if the remote server supports the
.Dq Range
header.
.It Fl o Ar output
When fetching a file or URL, save the contents in
.Ar output.
To make the contents go to stdout, use `-' for
.Ar output.
.It Fl P Ar port
Sets the port number to
.Ar port .
.It Fl S Ar tls_options
TLS options to use with HTTPS transfers.
The following settings are available:
.Bl -tag -width Ds
.It Cm cafile Ns = Ns Ar /path/to/cert.pem
PEM encoded file containing CA certificates used for certificate
validation.
.It Cm capath Ns = Ns Ar /path/to/certs/
Directory containing PEM encoded CA certificates used for certificate
validation.
.It Cm ciphers Ns = Ns Ar cipher_list
Specify the list of ciphers that will be used by
.Nm .
See the
.Xr openssl 1
.Cm ciphers
subcommand.
.It Cm depth Ns = Ns Ar max_depth
Maximum depth of the certificate chain allowed when performing
validation.
.It Cm dont
Don't perform server certificate validation.
.It Cm protocols Ns = Ns Ar string
Specify the TLS protocols to use.
If not specified the value
.Qq all
is used.
Refer to the
.Xr tls_config_parse_protocols 3
function for other valid protocol string values.
.El
.Pp
By default, server certificate validation is performed, and if it fails
.Nm
will abort.
If no
.Cm cafile
or
.Cm capath
setting is provided,
.Pa /etc/ssl/cert.pem
will be used.
.It Fl U Ar useragent
Set
.Ar useragent
as the User-Agent for HTTP(S) URL requests.
If not specified, the default User-Agent is
.Dq OpenBSD http .
.It Fl V
Disable verbose mode.
.El
.Sh ENVIRONMENT
.Nm
utilizes the following environment variables:
.Bl -tag -width Ds
.It Ev http_proxy
URL of HTTP proxy to use when making HTTP(S) URL requests.
.El