c2aa8c997a
hget supports adding custom headers with -r; it makes sense for hpost to do the same, both because custom headers are more likely necessary with POSTs, and for consistency.
272 lines
4.3 KiB
Text
272 lines
4.3 KiB
Text
.TH HGET 1
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.SH NAME
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hget, hpost, webpaste, urlencode \- retrieve, post to a web page corresponding to a url
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.SH SYNOPSIS
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.B hget
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[
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.B -l
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.B -o
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.I file
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] [
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.B -p
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.I body
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.B -P
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] [
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.B -r
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.I header
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] [
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.B -m
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.I method
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] [
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.B -b
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.I baseurl
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]
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.I url
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.PP
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.B hpost
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[
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.B -l
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] [
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.B -g
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.I action
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.B -p
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.I action
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.B -m
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.I action
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] [
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.B -r
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.I header
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] [
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.B -u
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]
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.I url
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[
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.I name:value
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.I name@file
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]
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.I ...
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.PP
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.B webpaste
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[
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.I file
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]
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.PP
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.B urlencode
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[
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.B -d
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] [
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.I file
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]
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.SH DESCRIPTION
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.I Hget
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retrieves the web page specified by the URL
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.I url
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and writes it, absent the
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.B -l
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and
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.B -o
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options, to standard output.
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.PP
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The
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.I url
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can be a relative path like
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.B ../index.html
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if a absolute
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.I baseurl
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was specified with the
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.B -b
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option.
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.PP
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If
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.I url
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is of type HTTP and the
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.B -p
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or
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.B -P
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options are specified, then a HTTP POST is performed.
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With
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.B -p
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the data to be posted is provided by the
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.I body
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argument as a string or alternatively with
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.B -P
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read from standard input.
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.PP
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The
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.B -l
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option causes
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.I hget
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and
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.I hpost
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to print the location URL from the transaction response
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instead of retrieving the body data. This is useful
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for HTTP POST transactions that redirect to a URL containing
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the posted data so we wont refetch the data we just uploaded
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to the site.
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.PP
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The
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.B -o
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option is used to keep a local file in sync with a
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web page. If the web page has been modified later than the
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file, it is copied into the file. If the file is up to date
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but incomplete,
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.I hget
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will fetch the missing bytes.
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.PP
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Option
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.B -r
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sends an arbitrary HTTP
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.IR header .
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The
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.B -r
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flag can be repeated to send multiple headers.
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.PP
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Option
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.B -m
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overrides the HTTP method used for the request.
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.PP
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.I Hpost
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retrieves the web page specified by the URL
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.I url,
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parses its HTML for form data, then prints
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.IR rc (1)
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commands to submit the forms with default field
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values.
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If an
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.I action
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URL is provided with the
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.B -g, -p
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or
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.B -m
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flags, then
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.I hget
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is invoked to execute the transaction submitting the form data.
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.PP
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The
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.B -g
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and
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.B -p
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flags set the form method to GET and POST, respectively. The
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.B -m
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flag sets the form method to POST and its enctype to
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.B multipart/form-data.
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In all cases, the target relative form action URL is set to
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.I action.
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.PP
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The
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.B -u
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flag sets the target URL to
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.I url.
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As the
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.I url
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parameter is always required, the
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.B -u
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flag can be omitted when
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.I url
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follows directly after the last option if any.
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.PP
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The remaining arguments of the form
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.B name:value
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are interpreted as text form field names and values to be submitted. An
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argument of the form
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.B name@file
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is interpreted as a file upload, with the information following the
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.B @
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symbol treated as the file name.
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For
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.B multipart/form-data
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uploads (see
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.B -m
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flag), the file has to be seekable as
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.IR file (1)
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is invoked to determine its mime type.
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.PP
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.I Webpaste
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uploads the contents either of its standard input or
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.I file
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to the pastebin website
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.B http://okturing.com
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and then prints a URL where the contents may be retrieved.
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.PP
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.I Urlencode
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is a helper program to URL encode and decode files. The
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.B -d
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flag, instead of encode, decodes URL encoded file. If no
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.I file
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is given, standard input is read. The resulting data
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is written to standard output.
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.SH EXAMPLES
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Download a file from the web.
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.IP
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.EX
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% hget http://9front.org/img/nix-on.jpg >/tmp/nix-on.jpg
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.EE
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.PP
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Retrieve the commands needed to submit a form, which may then be
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edited and sent.
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.IP
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.EX
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% hpost http://p.intma.in
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hpost -u http://p.intma.in -p paste.cgi text:
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.EE
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.PP
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Manually specify fields to be sent to a given
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.I url.
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.IP
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.EX
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% hpost -u http://p.intma.in -p paste.cgi text:'test post'
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.EE
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.PP
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Upload a file, print the resulting URL
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.IP
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.EX
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% hpost -l http://i.intma.in file@/tmp/screen.png | rc
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.EE
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.PP
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Upload the output of
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.IR ns (1)
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to
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.B http://okturing.com
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.IP
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.EX
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% ns | webpaste
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.EE
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.SH SOURCE
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.B /rc/bin/hget
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.br
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.B /rc/bin/hpost
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.br
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.B /rc/bin/webpaste
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.br
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.B /sys/src/cmd/urlencode.c
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.SH "SEE ALSO"
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.IR webfs (4),
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.IR ftpfs (4),
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.IR file (1)
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.SH DIAGNOSTICS
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.IR Hget ,
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.I hpost
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and
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.I webpaste
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require
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.IR webfs (4)
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service mounted on
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.B /mnt/web
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to work.
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.SH HISTORY
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.I Hget
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first appeared in Plan 9 from Bell Labs. It was
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rewritten as an
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.I rc
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script for 9front (January, 2012).
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.I Hpost
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and
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.I urlencode
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first appeared in 9front (October, 2012).
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.I Webpaste
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first appeared in 9front (September, 2013).
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