HTTPRestHandler

Description

The HTTPRestHandler enables the user to send requests to a server and save the returned answer in a process-variable. The status (success or error) of the call is written into the variable SYS.<name of the event>_status.


Class

com.dooris.bpm.actionhandler.HttpRestHandler

Parameter

Parameter name

Default value

Description

Valid examples

Parameter name

Default value

Description

Valid examples

hostName
MANDATORY

 

This parameter contains the URL of the requested server.

Host name (URL)

method

post

This parameter determines which method will be remotely invoked. Post means that the server expects an input in XML-Format that it will process and return. Get means that the Server will send data without requiring input.

delete
get
head
options
patch
post
put

templatePathMANDATORY (if httpBody is not set)

 

This parameter contains the file path to a JSON file that contains the input for the server.

Path to template

getParameter

 

This parameter contains the input for the server in JSON-Format.

 

httpBodyMANDATORY (if templatePath is not set)

 

This parameter contains the input for the server in JSON-Format.

 

responseVariable

 

This parameter contains the process variable into which the server response should be saved.

 

user

 

This parameter is only required if the server requires identification and contains the user name of the user.

 

pass

 

This parameter is only needed if the server requires an identification and contains the user's password.

 

authMethodMandatory

 

This parameter is only needed if the server requires identification and contains the encryption which should be applied. One possible encryption is base64, which will be applied by setting this parameter to basic.

oauth

basic

oAuthGrantTypeAccess

password

This parameter describes the OAuth grant type to be used in the request. For other options please refer to: OAuth Grant Types

 

oAuthGrantTypeRefresh

refresh_token

This parameter should come together with a value of Refresh Token and is used to obtain an Access Token.

 

oAuthClientId
MANDATORY (if authMethod == "oauth")

 

This parameter is a public identifier for the applications, i.e public exposed string that is used by the service API to identify the application.

 

oAuthClientSecret
MANDATORY (if authMethod == "oauth")

 

This parameter is a secret known only to the OAuth application and the authorization server. It is generated by the authorization server during the process of application registration. A client has to provide its client secret to authenticate itself to the authorization server.

 

oAuthTokenUrl
MANDATORY (if authMethod == "oauth")

 

Secifies the URL from where to retrieve the OAuth token from.

 

oAuthTokenBasicAuth

false

If it is true, then we retrieve OAuth access token using not empty values of parameters oAuthClientId and oAuthClientSecret as parameters for Basic Auth.

 

additionalFields

 

This parameter is used to add additonal fields to the Rest.

 

additionalHeaders

 

 

This parameter is used to add additonal Headers to the Rest .

{myNewHeader:'headerValue1',my2ndHeader:'headerValue2'}

searchByJsonPath

null

Here, the Json path for a specific part of the returned Json file and a variable name under which the specific part of the Json should be saved, are entered. The variable(s) are then saved in an array named 'result'. For better understanding see examples.

[{path: "[*]", resultVariable: "variable_name"}]

contentType

 

This parameter specifies the content type of the request.

 

newLineReplacement

 

Replaces all \n with the given value, unless false is provided as a value.

 

urlEncoding

true

If enabled, converts the URL to a US-ASCII string. In addition, square brackets will be ascaped with their respective ASCII values.

 

convertBodyToJson

false

This parameter is used to convert the query parameters to JSON string.

 

addNote

false

If enabled, stores the response as a note and attaches it to the current process instance.

 

addAllDocuments

false

If enabled, creates a mulitpart request containing all attached documents.
Only relevant for PUT requests.

 

addLocalDocument

 

This parameter adds a local file by the given path.

 

logResponse

 

If enabled, the response gets logged out in the server log.

 

logRequest

true

If enabled, the request gets logged out in the server log.

 

faultTolerance

1

This parameter can be specified as either 0 or 1. It only makes a difference if an exception is thrown. If an exception is thrown, the process is stopped if the parameter is set to 0 and if it is set to 1 the exception message is saved in the responseVariable and the process can continue as usual.

0

1

onErrorRepetition

0

Repeat execution if there is a faulty request (if its an IOException (like 403, 401))

 

isRestCallButton

false

This parameter is used when you want to call the rest handler from a TSD button .

 

 

Example:

Eventtype

Node Leave

Eventtype

Node Leave

Actionname

com.dooris.bpm.actionhandler.HttpRestHandler

Actionclass

com.dooris.bpm.actionhandler.HttpRestHandler

Parameter

hostName=https://yourcompanyserver.com/rest/list/${customerList};

method=Post;

postParameter={

"Company":"${customer_company}",

"First Name":"${customer_firstname}",

"Last Name":"${customer_lastname}",

"Email":"${customer_email}",};

user=John.Doe;

pass=specialPW;

authMethod=basic;

responseVariable=responseVar;

faultTolerance=0;

 

 

Example inputs for searchByJsonPath:

 

JSON Code example for what is returned with get method
[ { "id": "0001", "type": "donut", "batters": { "batter": [ { "id": "1001", "type": "Regular" }, { "id": "1002", "type": "Chocolate" } ] }, "topping": [ { "id": "5001", "type": "None" }, { "id": "5002", "type": "Glazed" } ] } ]

 

  1. If you want to get all the types from the ‘batter' and save it as result variable 'types’, you have to use as value:
    [{path: "[0]['batters']['batter'][*]['type']", resultVariable: "types"}]
    (We use * in order to get all types. For a specific position, use the number instead of *)
    result: {"types":["Regular","Chocolate"]}

  2. If you want to get the types of each 'batter' and save it in different result variables:
    [{path: "[0]['batters']['batter'][0]['type']", resultVariable: "type1"},{path: "[0]['batters']['batter'][1]['type']", resultVariable: "type2"}]
    result:{"type2":"Chocolate","type1":"Regular"}

  3. If you want to get the whole object based on a specific value e.x. 'Chocolate':
    [{path: "[0]['batters']['batter'][*][?(@.type == 'Chocolate')]", resultVariable: "res"}]
    result: {"res":[{"id":"1002","type":"Chocolate"}]}