Question

这是我正在查看的代码：

#!/bin/bash
nc -l 8080 &

curl "http://localhost:8080" \
-H "Accept: application/json" \
-H "Content-Type: application/json" \
--data @<(cat <<EOF
{
  "me": "$USER",
  "something": $(date +%s)
}
EOF
)

@的作用是什么？哪里有关于@的文档？

Answer 1

它是卷曲特定的符号。 man curl向您显示：

-d, --data <data>

(HTTP) Sends the specified data in a POST request to the HTTP server, in the
(same way that a browser does when a user has filled in an HTML form and
(presses the submit button. This will cause curl to pass the data to the
(server using the content-type application/x-www-form-urlencoded. Compare to
(-F, --form.

--data-raw is almost the same but does not have a special interpretation of
the @ character. To post data purely binary, you should instead use the
--data-binary option. To URL-encode the value of a form field you may use
--data-urlencode.

If any of these options is used more than once on the same command line, the
data pieces specified will be merged together with a separating &-symbol.
Thus, using '-d name=daniel -d skill=lousy' would generate a post chunk that
looks like 'name=daniel&skill=lousy'.

If you start the data with the letter @, the rest should be a file name to
read the data from, or - if you want curl to read the data from stdin.
Multiple files can also be specified. Posting data from a file named
'foobar' would thus be done with -d, --data @foobar. When --data is told to
read from a file like that, carriage returns and newlines will be stripped
out. If you don't want the @ character to have a special interpretation use
--data-raw instead.

See also --data-binary and --data-urlencode and --data-raw. This option
overrides -F, --form and -I, --head and -T, --upload-file.

这是什么意思？

1 个答案: