curl -d, --data

-d, --data <data>

• POST方法提交数据时，须使用--data来指定请求数据。和浏览器填充好表单点击提交按钮相同。
• 在没有指定内容类型的情况下，使用表单编码

• 直接使用--data提交数据时，中文会乱码。

  curl --verbose -data "name=eliminate" --data "hobby=play 足球football" localhost:8080/userAdd

• 当--data出现多次时，系统会自动用符号&拼接起来。

1. (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.
2. This will cause curl to pass the data to the server using the content-type application/x-www-form-urlencoded. Compare to -F, --form.
3. -d, --data is the same as --data-ascii. 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.
4. 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'.
5. 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. The contents of the
   file must already be URL-encoded. Multiple files can also be specified. Posting data from a file named 'foobar' would thus be done with --data @foobar.