How to create http MessageBody body with fields that contain dashes
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I would like to create http message bodies with fields that contain dashes. I haven't been able to find a workaround for Matlab disallowing hyphens (dashes) in the var names.
Here is what I'm trying to do - for illustration - I have an underscore in place of a hyphen the "test_var" (below)
Even after generating the RequestMessage (req1 below), you cannot change "test_var" to "test-var" because the RequestMessage is still storing the request as a struct (not as a string which could be modified).
method = matlab.net.http.RequestMethod.POST;
header = matlab.net.http.HeaderField('Content-Type', 'application/json');
header = addFields(header,'User-Agent', 'my-client/99.9');
header = addFields(header,'Accept', 'application/json');
% Struct approach
struct1 = struct('login', 'me', 'password', 'pw123', 'test_var', true)
body1 = matlab.net.http.MessageBody(struct1)
req1 = matlab.net.http.RequestMessage(method,header,body1)
show(req1)
POST
Content-Type: application/json
User-Agent: my-client/99.9
Accept: application/json
{"login":"me","password":"pw123","test_var":true}
req1.Body.Data
ans =
struct with fields:
login: 'me'
password: 'pw123'
test_var: 1
12 Comments
Umar
on 23 Jul 2024
No problem, @stedst9, it’s all teamwork and resolving problems together to help out each other. Glad to know that this problem is resolved.
More Answers (1)
Samuel Chan
on 22 Jul 2024
If Content-Type can be "text/plain" (mislabelling the content-type -- not sure if your API accepts that), then you can use string or char array as the message body:
MessageBody('{"login":"me","password":"pw123","test-var":true}');
If Content-Type must be "application/json", then calling RequestMessage.send will use jsonencode on your message body to generate the payload to send. If your message body contains a struct, you get:
'{"login":"me","password":"pw123","test_var":true}'
else if your message body contains a string, you get:
"{\"login\":\"me\",\"password\":\"pw123\",\"test-var\":true}"
Neither result is the JSON with dashed fields you desired.
If you want both Content-Type "application/json" and dashed field, you may look into this:
"To send arbitrary headers and data in a request message, set Completed to true to prevent the send method from modifying the message."
But in that case, it seems you will have to build and validate the request message yourself. (I have not try this before.)
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