Confluence file attachment issue using the REST API

[Phani]

This is the error response i get..

"{ statusCode: 400 message: "At least one attachment file must be included." }".

I know the HTTP POST message is well formatted as a multipart/form-data, any suggestions what might be missing

[Jesper Balle]

Well yes, I dowloaded curl, tried the examples from the documentation and compared the requests in Fiddler. The main difference was actually that  the Content-Disposition name in the multipart must be "File". Apart from that I actually ended up building the multi part my self

So the request that worked for me became:

POST https://<mywiki>.atlassian.net/wiki/rest/api/content/<pageid>/child/attachment HTTP/1.1
X-Atlassian-Token: nocheck
Accept: application/json, application/xml, text/json, text/x-json, text/javascript, text/xml
Content-Type: multipart/form-data; boundary=-----------------------------28947758029299
Host: <mywiki>.atlassian.net
Cookie: studio.crowd.tokenkey=<myvalue>
Content-Length: 40797
Accept-Encoding: gzip, deflate

-------------------------------28947758029299
Content-Disposition: form-data; name="File"; filename="<filename>.png"
Content-Type: application/octet-stream

 PNG
<Removed for readability>
-------------------------------28947758029299--

[Do Giang]

I got this error, too when used Application Link on JIRA 7, did you resolve it?

[Jesper Balle]

I have the same issue, did you solve it?

My request is looking like this (with the actual values in the <tokens>

POST https://<mywiki>.atlassian.net/wiki/rest/api/content/<pageid>/child/attachment HTTP/1.1
X-Atlassian-Token: nocheck
Accept: application/json, application/xml, text/json, text/x-json, text/javascript, text/xml
User-Agent: RestSharp/105.2.3.0
Content-Type: multipart/form-data; boundary=-----------------------------28947758029299
Host: <mywiki>.atlassian.net
Cookie: studio.crowd.tokenkey=<myvalue>
Content-Length: 40797
Accept-Encoding: gzip, deflate
-------------------------------28947758029299
Content-Disposition: form-data; name="<filename>.png"; filename="<filename>.png"
Content-Type: application/octet-stream
 PNG
<Removed for readability>
-------------------------------28947758029299--

Thank you