Hi Andy,

Have you got the Powerbuilder code you are using?  Looking at the link to the documentation you provided https://docs.documo.com/#34a91cce-9cfa-421f-b04c-7a58bf29a712, the examples show attachments being sent when the api request is sent as 'multipart/form-data' rather than 'application/json'.

Have a search of this forum for multipart and there are a bunch of examples which show how to send multipart/form-data http requests.  It is pretty straightforward.  If you look at the examples for some of the other languages e.g C# and Http on the documo document page it should give you a good idea about what you are trying to achieve.  Here is part of the http message that you are after:

POST /v1/faxes HTTP/1.1
Host: api.documo.com
Authorization: Basic API_KEY
Content-Type: multipart/form-data; boundary=----WebKitFormBoundary7MA4YWxkTrZu0gW
Content-Length: 1748

----WebKitFormBoundary7MA4YWxkTrZu0gW
Content-Disposition: form-data; name="faxNumber"

11234567890
----WebKitFormBoundary7MA4YWxkTrZu0gW
Content-Disposition: form-data; name="attachments"; filename="file"
Content-Type: <Content-Type header here>

(data)
----WebKitFormBoundary7MA4YWxkTrZu0gW
Content-Disposition: form-data; name="coverPage"

false
----WebKitFormBoundary7MA4YWxkTrZu0gW
Content-Disposition: form-data; name="coverPageId"

d1077489-5ea1-4db1-9760-853f175e8288
----WebKitFormBoundary7MA4YWxkTrZu0gW
Content-Disposition: form-data; name="tags"

Have you tried if it works when opening the file in streammode?

long ll_filetoload
blob lbl_filestream

ll_filetoload = fileopen("your file", streammode!, read!, lockwrite!)

filereadex(ll_filetoload, lbl_filestream)

fileclose(ll_filetoload)

Then you have to "submit" it the way nodejs does "submit" createReadStream result. I don't know if it will work. You can test it...

Andreas.

The fax server isn't going to be able to access the local file "c:\\temp\\q.pdf". That is why it needs the URL pointing to a file on a web server.

Check their documentation to see if it has a way to embed the contents of the file in the message.

Also, \\ is used in C++ to indicate a single back-slash. In PB the escape character is ~ and in C++ it is \.

Hi, Andy - 

Is this a PowerBuilder problem or a Documo mFax problem? You may need to ask the vendor that supplies the REST API.

Just a guess: Try supplying the file's path and name in URL form. For example: "file:///C:/test.pdf".