CURL

-F, --form <name=content>
(HTTP) This lets curl emulate a filled-in form in which a user has pressed the submit button. This causes curl to POST data using the Content-Type multipart/form-
data according to RFC 2388. This enables uploading of binary files etc. To force the 'content' part to be a file, prefix the file name with an @ sign. To just get
the content part from a file, prefix the file name with the symbol <. The difference between @ and < is then that @ makes a file get attached in the post as a
file upload, while the < makes a text field and just get the contents for that text field from a file.

Example, to send your password file to the server, where 'password' is the name of the form-field to which /etc/passwd will be the input:

curl -F password=@/etc/passwd www.mypasswords.com

To read content from stdin instead of a file, use - as the filename. This goes for both @ and < constructs.

You can also tell curl what Content-Type to use by using 'type=', in a manner similar to:

curl -F "web=@index.html;type=text/html" url.com

or

curl -F "name=daniel;type=text/foo" url.com

You can also explicitly change the name field of a file upload part by setting filename=, like this:

curl -F "file=@localfile;filename=nameinpost" url.com

If filename/path contains ',' or ';', it must be quoted by double-quotes like:

curl -F "file=@\"localfile\";filename=\"nameinpost\"" url.com

or

curl -F 'file=@"localfile";filename="nameinpost"' url.com

Note that if a filename/path is quoted by double-quotes, any double-quote or backslash within the filename must be escaped by backslash.

See further examples and details in the MANUAL.

This option can be used multiple times.

（1）文件上传,Html 表单上传方式：
<form name="form1" method="post" enctype="multipart/form-data" action="http://www.a.com/file">
<div>
<label for="caption">AppId:</label>
<input id="AppId" onblur="javascript:updateAction();" type="text" value="cfttest"/>
</div>
<div>
<label for="image1">上传文件：</label>
<input name="filedata" type="file" />
</div>
<div>
<label for="image1">上传类型：</label>
<select id="uptype" name="uptype">
<option value="0">唯一</option>
<option value="1">覆盖</option>
</select>
</div>
<div>
<input type="submit" name="upload" value="上传" />
</div>
</form>

(2).curl --form upload=@a41.zip --form uptype=1 http://www.a.com/file

(3).curl -F "file=@a41.txt;filename=testaaabcd.txt" http://www.a.com/file

上传文件，文件名称：testaaabcd.txt

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