HttpCalls

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HttpCalls
HttpCalls
In this article we will talk about EDDI's httpCalls feature (calling other JSON APIs).
The httpCalls feature allows a Chatbot to consume 3rd party APIs and use the JSON response in another httpCall (for authentication or requesting a token for instance) or directly print the results in Chatbot's Output, this means, for example, you can call a weather API and use the JSON response in your Chatbot's output if the user asks about today's weather or the week's forecast!
We will emphasize the httpCall model and go through an example step by step, you can also download the example in Postman collection format and run the steps.
Model and API endpoint
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{
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  "targetServer": "string",
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  "httpCalls": [
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    {
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      "name": "string",
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      "saveResponse": boolean,
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      "fireAndForget": boolean,
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      "responseObjectName": "string",
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      "actions": [
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        "string"
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      ],
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      "preRequest": {
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        "batchRequests": {
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          "pathToTargetArray": "string",
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          "iterationObjectName": "string"
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        }
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      },
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      "request": {
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        "path": "string",
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        "headers": {},
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        "queryParams": {},
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        "method": "string",
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        "contentType": "string",
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        "body": "string"
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      },
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      "postResponse": {
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        "qrBuildInstruction": {
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          "pathToTargetArray": "String",
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          "iterationObjectName": "String",
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          "quickReplyValue": "String",
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          "quickReplyExpressions": "String"
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        },
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        "propertyInstructions": [
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          {
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            "name": "string",
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            "value": "string",
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            "scope": "string",
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            "fromObjectPath": "savedObjName.something.something",
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            "override": boolean,
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            "httpCodeValidator": {
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              "runOnHttpCode": [
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                <array of Integers>
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              ],
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              "skipOnHttpCode": [
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                <array of Integers>
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              ]
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            }
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          }
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        ]
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      }
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    }
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  ]
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}
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Description
An httpCall is mainly composed from the targetServer array of httpCalls, the latter will have request where you put all details about your actual http request (method,path,headers, etc..) and postResponse where you can define what happens after the httpCall has been executed and a response has been received; such as quick replies by using qrBuildInstruction.
You can use ${memory.current.httpCalls.<responseObjectName>} to access your JSON object, so you can use it in output templating or in another httpCall, for example an httpCall will get the oAuth token and another httpCall will use in the http headers to authenticate to an API.
Description of the model
Element
Description
targetServer
(String) root/context path of the httpCall (e.g http://example.com/api)
httpCall.saveResponse
(Boolean) whether to save the JSON response into ${memory.current.httpCalls}
httpCall.fireAndForget
(Boolean) whether to execute the request without waiting for a response to be returned, (useful for POST)
httpCall.responseObjectName
(String) name of the JSON object so it can be accessed from other httpCalls or outputsets.
httpCall.actions
(String) name of the output/behavior set mapped to this http call.
httpCall.preRequest.batchRequests.pathToTargetArray
(String) JSON path to the target array to be used as body of requests e.g: "memory.current.output"
httpCall.preRequest.batchRequests.iterationObjectName
(String) name of the variable to be used for each element of array found in pathToTargetArray
httpCall.request.path
(String) path in the targetServer of the httpCall (e.g /books)
httpCall.request.headers
(Array:<key, value> ) for each httpCall HTTP header
httpCall.request.queryParams
(Array: <key, value>) for each httpCall query parameter
httpCall.request.method
(String) HTTP Method of the httpCall (e.g GET,POST,etc...)
httpCall.request.contentType
(String) value of the contentType HTTP header of the httpCall
httpCall.request.body
(String) an escaped JSON object that goes in the HTTP Request body if needed.
httpCall.postResponse.qrBuildInstruction.pathToTargetArray
(String) path to the array in your JSON response data.
httpCall.postResponse.qrBuildInstruction.iterationObjectName
(String) a variable name that will point to the TargetArray.
httpCall.postResponse.qrBuildInstruction.quickReplyValue
(String) thymeleaf expression to use as a quickReply value.
httpCall.postResponse.qrBuildInstruction.quickReplyExpressions
(String) expression to retrieve a property from iterationObjectName.
httpCall.postResponse.propertyInstructions.name
(String) name of property to be used in templating
httpCall.postResponse.propertyInstructions.value
(String) a static value can be set here if fromObjectPath is not defined.
HttpCall API endpoints
HTTP Method
API Endpoint
Request Body
Response
POST
/httpcallsstore/httpcalls
http-call-model
N/A
GET
/httpcallsstore/httpcalls/descriptors
N/A
list of references to http-call-model
DELETE
/httpcallsstore/httpcalls/{id}
N/A
N/A
GET
/httpcallsstore/httpcalls/{id}
N/A
http-call-model
PUT
/httpcallsstore/httpcalls/{id}
http-call-model
N/A
GET
/httpcallsstore/httpcalls/{id}/currentversion
N/A
http-call-model
POST
/httpcallsstore/httpcalls/{id}/currentversion
http-call-model
N/A
httpCall Sample
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{
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  "targetServer": "https://api.bot-metrics.com/v1/messages",
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  "httpCalls": [
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    {
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      "name": "sendUserMessageToAnalytics",
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      "actions": [
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        "send_input_to_analytics"
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      ],
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      "saveResponse": false,
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      "fireAndForget": true,
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      "request": {
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        "method": "post",
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        "queryParams": {
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          "token": "<token>"
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        },
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        "contentType": "application/json",
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        "body": "{\"text\": \"[[${memory.current.input}]]\",\"message_type\": \"incoming\",\"user_id\": \"[[${memory.current.userInfo.userId}]]\",\"platform\": \"eddi\"}"
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      }
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    },
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    {
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      "name": "sendBotMessageToAnalytics",
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      "actions": [
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        "send_output_to_analytics"
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      ],
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      "saveResponse": false,
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      "fireAndForget": true,
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      "preRequest": {
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        "batchRequests": {
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          "pathToTargetArray": "memory.current.output",
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          "iterationObjectName": "output"
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        }
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      },
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      "request": {
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        "method": "post",
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        "queryParams": {
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          "token": "<token>"
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        },
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        "contentType": "application/json",
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        "body": "{\"text\": \"[[${output}]]\",\"message_type\": \"outgoing\",\"user_id\": \"[[${memory.current.userInfo.userId}]]\",\"platform\": \"eddi\"}"
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      },
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      "postResponse": {
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        "propertyInstructions": [
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          {
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            "name": "nameOfPropertyToBeUsedInTemplating",
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            "value": "StaticValueHereIfFromObjectPathIsNotDefined",
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            "scope": "step",
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            "fromObjectPath": "savedObjName.something.something",
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            "override": true,
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            "httpCodeValidator": {
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              "runOnHttpCode": [
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                200
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              ],
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              "skipOnHttpCode": [
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                0,
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                400,
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                401,
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                402,
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                403,
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                404,
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                409,
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                410,
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                500,
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                501,
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                502
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              ]
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            },
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            "qrBuildInstruction": {
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              "pathToTargetArray": "savedObjName.data.topics",
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              "iterationObjectName": "topic",
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              "templateFilterExpression": "${topic.subType} != 'specialSubType'",
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              "quickReplyValue": "[(${topic.name})]",
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              "quickReplyExpressions": "property(topic_id([(${topic.id})]))"
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            }
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          }
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        ]
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      }
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    }
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  ]
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}
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Step by step example
We will do a step by step example from scratch (Chatbot creation to a simple conversation that uses httpCall)
For the sake of simplicity we will use a free weather API to fetch weather of cities by their names (api.openweathermap.org).
1 - Create regularDictionnary
More about regular dictionaries can be found here.
Request URL
POST http://localhost:7070/regulardictionarystore/regulardictionaries
Request Body
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{
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  "words": [
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    {
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      "word": "weather",
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      "expressions": "trigger(current_weather)",
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      "frequency": 0
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    }
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  ],
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  "phrases": [
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    {
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      "phrase": "what is the weather",
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      "expressions": "trigger(current_weather)"
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    },
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    {
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      "phrase": "whats the weather",
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      "expressions": "trigger(current_weather)"
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    }
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  ]
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}
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Response Body
no content
Response Code
201
Response Headers
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{
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  "access-control-allow-origin": "*",
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  "date": "Sun, 13 May 2018 16:40:58 GMT",
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  "access-control-allow-headers": "authorization, Content-Type",
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  "content-length": "0",
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  "location": "eddi://ai.labs.regulardictionary/regulardictionarystore/regulardictionaries/5af86a9aba31c023bcb9ef2b?version=1",
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  "access-control-allow-methods": "GET, PUT, POST, DELETE, PATCH, OPTIONS",
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  "access-control-expose-headers": "location",
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  "content-type": null
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}
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2 - Create the behaviorSet
More about behaviorSets can be found in Behavior Rules​
Request URL
POST http://localhost:7070/behaviorstore/behaviorsets
Response Body
no content
Response Code
201
Request Body
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{
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  "behaviorGroups": [
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    {
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      "name": "",
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      "behaviorRules": [
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        {
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          "name": "Ask for City",
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          "actions": [
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            "ask_for_city"
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          ],
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          "conditions": [
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            {
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              "type": "inputmatcher",
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              "configs": {
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                "expressions": "trigger(current_weather)"
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              }
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            }
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          ]
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        },
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        {
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          "name": "Current Weather in City",
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          "actions": [
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            "current_weather_in_city"
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          ],
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          "conditions": [
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            {
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              "type": "inputmatcher",
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              "configs": {
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                "expressions": "trigger(current_weather)",
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                "occurrence": "lastStep"
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              }
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            }
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          ]
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        }
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      ]
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    }
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  ]
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}
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Response Headers
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{
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  "access-control-allow-origin": "*",
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  "date": "Sun, 13 May 2018 16:45:52 GMT",
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  "access-control-allow-headers": "authorization, Content-Type",
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  "content-length": "0",
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  "location": "eddi://ai.labs.behavior/behaviorstore/behaviorsets/5af86bc0ba31c023bcb9ef2c?version=1",
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  "access-control-allow-methods": "GET, PUT, POST, DELETE, PATCH, OPTIONS",
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  "access-control-expose-headers": "location",
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  "content-type": null
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}
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3 - Create the httpCall
Note that we can pass user input to the http call using [[${memory.current.input}]]
Request URL
POST http://localhost:7070/httpcallsstore/httpcalls
Request Body
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{
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  "targetServer": "https://api.openweathermap.org/data/2.5/weather",
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  "httpCalls": [
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    {
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      "name": "currentWeather",
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      "saveResponse": true,
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      "responseObjectName": "currentWeather",
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      "actions": [
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        "current_weather_in_city"
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      ],
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      "request": {
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        "path": "",
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        "headers": {},
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        "queryParams": {
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          "APPID": "c3366d78c7c0f76d63eb4cdf1384ddbf",
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          "units": "metric",
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          "q": "[[${memory.current.input}]]"
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        },
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        "method": "get",
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        "contentType": "",
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        "body": ""
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      }
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    }
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  ]
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}
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Response Body
no content
Response Code
201
Response Headers
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{
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  "access-control-allow-origin": "*",
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  "date": "Sun, 13 May 2018 19:13:52 GMT",
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  "access-control-allow-headers": "authorization, Content-Type",
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  "content-length": "0",
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  "location": "eddi://ai.labs.httpcalls/httpcallsstore/httpcalls/5af88e70ba31c023bcb9ef2e?version=1",
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  "access-control-allow-methods": "GET, PUT, POST, DELETE, PATCH, OPTIONS",
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  "access-control-expose-headers": "location",
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  "content-type": null
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}
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4 - Create the outputSet
More about outputSet can be found Output Configuration.
Note When you set "saveResponse" : true in httpCall then you can use [[${memory.current.httpCalls.<responseObjectName>}]] to access the response data and use thymeleaf( th:each ) to iterate over JSON arrays if you have them in your JSON response.
Request URL
POST http://localhost:7070/outputstore/outputsets
Request Body
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{
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  "outputSet": [
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    {
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      "action": "ask_for_city",
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      "timesOccurred": 0,
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      "outputs": [
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        {
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          "type": "text",
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          "valueAlternatives": [
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            "Which City would you like to know the weather of?"
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          ]
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        }
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      ],
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      "quickReplies": []
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    },
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    {
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      "action": "current_weather_in_city",
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      "timesOccurred": 0,
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      "outputs": [
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        {
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          "type": "text",
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          "valueAlternatives": [
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            "The current weather situation of [[${memory.current.input}]] is [[${memory.current.httpCalls.currentWeather.weather[0].description}]] at [[${memory.current.httpCalls.currentWeather.main.temp}]] °C"
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          ]
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        }
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      ],
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      "quickReplies": []
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    }
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  ]
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}
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Response Body
no content
Response Code
201
Response Headers
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{
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  "access-control-allow-origin": "*",
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  "date": "Sun, 13 May 2018 16:48:37 GMT",
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  "access-control-allow-headers": "authorization, Content-Type",
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  "content-length": "0",
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  "location": "eddi://ai.labs.output/outputstore/outputsets/5af86c65ba31c023bcb9ef2d?version=1",
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  "access-control-allow-methods": "GET, PUT, POST, DELETE, PATCH, OPTIONS",
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  "access-control-expose-headers": "location",
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  "content-type": null
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}
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5 - Creating the package
More about packages can be found here.
Important Package note
ai.labs.httpcalls & ai.labs.output must come after ai.labs.behavior in order of the package definition
ai.labs.templating has to be after ai.labs.output
Request URL
POST http://localhost:7070/packagestore/packages
Request Body
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{
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  "packageExtensions": [
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    {
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      "type": "eddi://ai.labs.parser",
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      "extensions": {
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        "dictionaries": [
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          {
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            "type": "eddi://ai.labs.parser.dictionaries.integer"
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          },
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          {
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            "type": "eddi://ai.labs.parser.dictionaries.decimal"
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          },
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          {
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            "type": "eddi://ai.labs.parser.dictionaries.punctuation"
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          },
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          {
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            "type": "eddi://ai.labs.parser.dictionaries.email"
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          },
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          {
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            "type": "eddi://ai.labs.parser.dictionaries.time"
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          },
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          {
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            "type": "eddi://ai.labs.parser.dictionaries.ordinalNumber"
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          },
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          {
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            "type": "eddi://ai.labs.parser.dictionaries.regular",
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            "config": {
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              "uri": "eddi://ai.labs.regulardictionary/regulardictionarystore/regulardictionaries/{{dictionary_id}}?version=1"
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            }
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          }
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        ],
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        "corrections": [
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          {
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            "type": "eddi://ai.labs.parser.corrections.stemming",
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            "config": {
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              "language": "english",
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              "lookupIfKnown": "false"
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            }
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          },
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          {
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            "type": "eddi://ai.labs.parser.corrections.levenshtein",
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            "config": {
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              "distance": "2"
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            }
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          },
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          {
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            "type": "eddi://ai.labs.parser.corrections.mergedTerms"
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          }
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        ]
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      },
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      "config": {}
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    },
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    {
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      "type": "eddi://ai.labs.behavior",
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      "config": {
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        "uri": "eddi://ai.labs.behavior/behaviorstore/behaviorsets/{{behaviourset_id}}?version=1"
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      }
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    },
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    {
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      "type": "eddi://ai.labs.httpcalls",
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      "config": {
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        "uri": "eddi://ai.labs.httpcalls/httpcallsstore/httpcalls/{{httpcall_id}}?version=1"
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      }
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    },
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    {
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      "type": "eddi://ai.labs.output",
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      "config": {
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        "uri": "eddi://ai.labs.output/outputstore/outputsets/{{outputset_id}}?version=1"
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      }
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    },
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    {
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      "type": "eddi://ai.labs.templating",
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      "extensions": {},
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      "config": {}
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    }
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  ]
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}
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Response Body
no content
Response Code
201
Response Headers
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{
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  "access-control-allow-origin": "*",
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  "date": "Sun, 13 May 2018 19:26:36 GMT",
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  "access-control-allow-headers": "authorization, Content-Type",
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  "content-length": "0",
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  "location": "eddi://ai.labs.package/packagestore/packages/5af8916cba31c023bcb9ef2f?version=1",
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  "access-control-allow-methods": "GET, PUT, POST, DELETE, PATCH, OPTIONS",
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  "access-control-expose-headers": "location",
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  "content-type": null
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}
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6 - Creating the bot
Request URL
POST http://localhost:7070/botstore/bots
Request Body
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{
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  "packages": [
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    "eddi://ai.labs.package/packagestore/packages/{{package_id}}?version=1"
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  ],
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  "channels": []
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}
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Response Body
no content
Response Code
201
Response Headers
1
{
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  "access-control-allow-origin": "*",
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  "date": "Sun, 13 May 2018 21:18:16 GMT",
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  "access-control-allow-headers": "authorization, Content-Type",
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  "content-length": "0",
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  "location": "eddi://ai.labs.bot/botstore/bots/5af8ab98ba31c023bcb9ef32?version=1",
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  "access-control-allow-methods": "GET, PUT, POST, DELETE, PATCH, OPTIONS",
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  "access-control-expose-headers": "location",
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  "content-type": null
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}
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7 - Deploy the bot
Request URL
POST http://localhost:7070/administration/restricted/deploy/**<bot_id>**?version=1&autoDeploy=true
Response Body
no content
Response Code
202
Response Headers
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{
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  "access-control-allow-origin": "*",
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  "date": "Sun, 13 May 2018 21:21:54 GMT",
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  "access-control-allow-headers": "authorization, Content-Type",
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  "content-length": "0",
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  "access-control-allow-methods": "GET, PUT, POST, DELETE, PATCH, OPTIONS",
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  "access-control-expose-headers": "location",
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  "content-type": null
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}
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8 - Create the conversation
Request URL
POST http://localhost:7070/bots/**<env>**/**<bot_id>**
Response Body
no content
Response Code
201
Response Headers
1
{
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  "access-control-allow-origin": "*",
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  "date": "Sun, 13 May 2018 21:30:45 GMT",
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  "access-control-allow-headers": "authorization, Content-Type",
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  "content-length": "0",
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  "location": "eddi://ai.labs.conversation/conversationstore/conversations/5af8ae85ba31c023bcb9ef35",
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  "access-control-allow-methods": "GET, PUT, POST, DELETE, PATCH, OPTIONS",
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  "access-control-expose-headers": "location",
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  "content-type": null
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}
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9 - Say weather
Request URL
POST http://localhost:7070/bots/<env>/<bot_id>/<conversation_id>?returnDetailed=false&returnCurrentStepOnly=true
Request Body
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{
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  "input": "weather"
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}
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Response Body
1
{
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  "botId": "5af8b075ba31c023bcb9ef3b",
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  "botVersion": 1,
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  "environment": "unrestricted",
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  "conversationState": "READY",
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  "redoCacheSize": 0,
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  "conversationSteps": [
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    {
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      "conversationStep": [
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        {
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          "key": "input:initial",
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          "value": "weather"
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        },
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        {
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          "key": "actions",
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          "value": [
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            "ask_for_city"
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          ]
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        },
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        {
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          "key": "output:text:ask_for_city",
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          "value": "Which City would you like to know the weather of?"
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        }
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      ],
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      "timestamp": 1526247548410
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    }
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  ]
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}
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Response Code
200
Response Headers
1
{
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  "access-control-allow-origin": "*",
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  "date": "Sun, 13 May 2018 21:35:15 GMT",
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  "content-type": "application/json;resteasy-server-has-produces=true",
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  "access-control-allow-headers": "authorization, Content-Type",
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  "content-length": "325",
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  "access-control-allow-methods": "GET, PUT, POST, DELETE, PATCH, OPTIONS",
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  "access-control-expose-headers": "location"
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}
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10 - Say "Vienna"
Request URL
POST http://localhost:7070/bots/<env>/<bot_id>/<conversation_id>?returnDetailed=false&returnCurrentStepOnly=true
Request Body
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{
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  "botId": "5af8b075ba31c023bcb9ef3b",
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  "botVersion": 1,
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  "environment": "unrestricted",
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  "conversationState": "READY",
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  "redoCacheSize": 0,
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  "conversationSteps": [
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    {
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      "conversationStep": [
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        {
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          "key": "input:initial",
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          "value": "Vienna"
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        },
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        {
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          "key": "actions",
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          "value": [
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            "current_weather_in_city"
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          ]
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        },
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        {
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          "key": "output:text:current_weather_in_city",
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          "value": "The current weather situation of Vienna is clear sky at 17.68 °C"
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        }
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      ],
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      "timestamp": 1526247618080
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    }
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  ]
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}
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Response Code
200
Response Headers
1
{
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  "access-control-allow-origin": "*",
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  "date": "Sun, 13 May 2018 21:35:15 GMT",
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  "content-type": "application/json;resteasy-server-has-produces=true",
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  "access-control-allow-headers": "authorization, Content-Type",
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  "content-length": "325",
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  "access-control-allow-methods": "GET, PUT, POST, DELETE, PATCH, OPTIONS",
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  "access-control-expose-headers": "location"
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}
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Full example
If you would like to run the full example through postman, you can download and import the collection below.
EDDI - Weather bot.postman_collection.json
21KB
Code
EDDI - Weather bot.postman_collection.json
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