Appian Web API needs to exposed to start a process in Appian with documents from external system

Hi Shakilah,

Yes, it is possible. Please refer the document and sharing code snippet as well. 

https://docs.appian.com/suite/help/20.3/passing-a-web-api-document-into-a-process-model.html

Use below code as it is, only change Process model Constant:-

a!localVariables(

/*Check whether the request body contains a document*/
local!success: not(or(rule!APN_isEmpty(http!request.body),isnull(http!request.body)) ),

if(
local!success,

/*If a document was uploaded, start the Upload Student Transcript process*/
a!startProcess(
processModel: cons!XYZCONSTANT,
processParameters: {

/*A document*/
transcript: http!request.body,
/*unid:http!request.headers.unid*/
unid:http!request.queryParameters.docFolderName

/*Metadata from parameters or headers*/
/*studentId: http!request.queryParameters.studentId*/
},
onSuccess: a!httpResponse(
statusCode: 200,
headers: {},

/*Print the document id, name, and extension of the uploaded document*/
body:

concat(
"Upload Successful: ",
document(http!request.body, "id"),
" - ",
document(http!request.body, "name"),
".",
document(http!request.body, "extension")
)


),
onError: a!httpResponse(
statusCode: 500,
headers: {},
body: "500 Internal Server Error"
)
),

/*If no document was uploaded, return an error code*/
a!httpResponse(
statusCode: 400,
headers: {},
body: "400 Document Not Provided"
)
)
)

Thanks,
Sandeep

Hi Shakilah,

Yes, it is possible. Please refer the document and sharing code snippet as well. 

https://docs.appian.com/suite/help/20.3/passing-a-web-api-document-into-a-process-model.html

Use below code as it is, only change Process model Constant:-

a!localVariables(

/*Check whether the request body contains a document*/
local!success: not(or(rule!APN_isEmpty(http!request.body),isnull(http!request.body)) ),

if(
local!success,

/*If a document was uploaded, start the Upload Student Transcript process*/
a!startProcess(
processModel: cons!XYZCONSTANT,
processParameters: {

/*A document*/
transcript: http!request.body,
/*unid:http!request.headers.unid*/
unid:http!request.queryParameters.docFolderName

/*Metadata from parameters or headers*/
/*studentId: http!request.queryParameters.studentId*/
},
onSuccess: a!httpResponse(
statusCode: 200,
headers: {},

/*Print the document id, name, and extension of the uploaded document*/
body:

concat(
"Upload Successful: ",
document(http!request.body, "id"),
" - ",
document(http!request.body, "name"),
".",
document(http!request.body, "extension")
)


),
onError: a!httpResponse(
statusCode: 500,
headers: {},
body: "500 Internal Server Error"
)
),

/*If no document was uploaded, return an error code*/
a!httpResponse(
statusCode: 400,
headers: {},
body: "400 Document Not Provided"
)
)
)

Thanks,
Sandeep