问题
When making a post cURL request as below to try and continue a created conversation watson instead returns a new conversation.
curl -u "USERNAME":"PASSWORD" -X POST --form conversation_id=CONVOID --form client_id=CLIENTID --form input="What type of toppings do you have?" "https://gateway.watsonplatform.net/dialog/api/v1/dialogs/DIALOGID/conversation"
If i use the below cURL it works fine.
curl -u "USERNAME":"PASSWORD" --data "conversation_id=CONVOID&client_id=CLIENTID&input=What type of toppings do you have?" https://gateway.watsonplatform.net/dialog/api/v1/dialogs/DIALOGID/conversation
My issue being that now when trying to write a c# wrapper i'm running in to the same issue that POST requests fail to transmit their form data correctly.
What's going on ?
I either need a c# MVC equivalent to the "--data" formatting. ( currently using HttpClient.PostAsync) or to figure out what is exactly wrong with using post requests to continue conversations.
As far as i can tell i am replicating the post request in c# correctly so i don't think there are two issues. ( just one post request issue, not a cURL issue then a C# implementation issue.)
For what it's worth i have left the commands in the format i submitted them, only replacing sensitive values with BLOCKCAPITALS. If it looks like i've missed a quotation mark or curly bracket , it's because i have and may be the cause of the issue.
回答1:
The service expects an application/x-www-form-urlencoded POST request
To do that in curl you need to use the -d parameter:
curl -u "USERNAME":"PASSWORD" -X POST
-d conversation_id=CONVOID
-d client_id=CLIENTID
-d input="What type of toppings do you have?"
"https://gateway.watsonplatform.net/dialog/api/v1/dialogs/DIALOGID/conversation"
-d, --data
(HTTP) Sends the specified data in a POST request to the HTTP server, in the same way that a browser does when a user has filled in an HTML form and presses the submit button. This will cause curl to pass the data to the server using the content-type application/x-www-form-urlencoded. Compare to -F, --form.
Curl documentation
来源：https://stackoverflow.com/questions/35685955/watson-dialog-curl-conversation-post-request-not-passing-form-data