how to use --data-binary in bash curl command with multi params

Question

<?php
$post_data = array(
    'filename'=>new \CurlFile($uploadPath),
    'jsondata'=> json_encode($params,JSON_UNESCAPED_UNICODE)
$toPdfApi='https://example.com/convert2PDF'
$curl = curl_init();
curl_setopt($curl, CURLOPT_URL,$toPdfApi);
curl_setopt($curl, CURLOPT_HEADER, false);
curl_setopt($curl, CURLOPT_POST, true);
curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
curl_setopt($curl,CURLOPT_BINARYTRANSFER,true);
curl_setopt($curl, CURLOPT_HTTPHEADER, array(
        'multipart/form-data',
        'application/x-www-form-urlencoded'));
curl_setopt($curl, CURLOPT_POSTFIELDS,$post_data);
$result = curl_exec($curl);

Then I convert it to bash shell command

curl -i -X POST -H "Content-Type: multipart/form-data" -H "Content-Type: application/x-www-form-urlencoded" --data-binary  'filename=@/root/test.txt' --data-binary   'jsondata={"fileName":"test","id":"xxx","backlink":"https://example.com/hello"}' https://example.com/convert2PDF

But the reponse result still not right

HTTP/1.1 200 OK
Date: Fri, 01 Jun 2018 14:41:37 GMT
Content-Type: application/x-www-form-urlencoded
Transfer-Encoding: chunked
Server: Jetty(9.4.5.v20170502)

error

Can someone help ? is it my covert bash shell right?

if I use the following command [replace -data-binary to -F ], I get the right status ,but from the php code I know I should add the CURLOPT_BINARYTRANSFER in bash curl ,otherwise the https://example.com/convert2PDF can not get the right post data.

curl -i -X POST -H "Content-Type: multipart/form-data" -H "Content-Type: application/x-www-form-urlencoded" -F  'filename=@/root/test.txt' -F   'jsondata={"fileName":"test","id":"xxx","backlink":"https://example.com/hello"}' https://example.com/convert2PDF

HTTP/1.1 100 Continue

HTTP/1.1 200 OK
Date: Fri, 01 Jun 2018 16:29:35 GMT
Content-Type: application/x-www-form-urlencoded
Transfer-Encoding: chunked
Server: Jetty(9.4.5.v20170502)

success

I want to get the reponse's status is 200 ,and the result is success in --data-binary mode ,What can I do to udpate my bash command ?

Think you could add what you are getting vs. what you expect? — Jason
– Jason, Commented Jun 1, 2018 at 16:23
@Jason Update the descrbie . Give some advice if you are conviniece ,thanks a lot . — 兰秀菊
– 兰秀菊, Commented Jun 1, 2018 at 16:41
@json ,Yes , the variable $uploadPath is the path of text.txt — 兰秀菊
– 兰秀菊, Commented Jun 2, 2018 at 3:41

Tim · Accepted Answer · 2018-06-01 17:28:22Z

The whole point of --data-binary is that it's one big lump of bytes. You can only send one as each HTTP request only has one body and can only have one top-level content type.

What it seems you're trying to do is construct a multi-part request body that has two parts, one containing file data and one containing key/value pairs.

To send a file with some metadata over command line, you can do this:

curl -F'id=xxx' -F 'name=foo' -F'[email protected];type=text/plain' http://example.com

That will send a multi-part request where a PHP backend could access the metadata from $_POST and the file data from $_FILES.

The exact approach required would depend on what the back end expects to receive but you've not posted that.

For example, the following would work with --data-binary (as per your question) but the parameters and the file data would both be accessed in a different way on the back end.

curl --data-binary '@test.txt' 'http://example.com?id=xxx&name=foo'

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