Dynamics Community Forum Thread Details

How to use CRM web API batch request using javascript

Hi Alagunellaikumar,

Please try the following code. This is an example to create multiple task for new account.

//Create 1 Js web resource method that will handle batch request
function executeBatch (payload, batchId, successCallback, errorCallback, callerId) {
 
var req = new XMLHttpRequest();
req.open(“POST”, “Your Web Api Here” + “$batch”), true);
req.setRequestHeader(“Accept”, “application/json”);
req.setRequestHeader(“Content-Type”, “multipart/mixed;boundary=batch_” + batchId);
req.setRequestHeader(“OData-MaxVersion”, “4.0”);
req.setRequestHeader(“OData-Version”, “4.0”);
 
req.onreadystatechange = function () {
if (this.readyState == 4 /* complete */) {
req.onreadystatechange = null;
if (this.status == 200) {
if (successCallback) {
successCallback(this.response);
}
}
else {
if (errorCallback)
errorCallback(Sdk.WebApiOperation.errorHandler(this));
}
}
};
 
req.send(payload);
}
//Create CreateBatchTaskforAccount method to create task for new account
function CreateBatchTaskforAccount(accountUri )
{
//Generating random id for the payload object
 
var batchId = GetRandomId();
//Define tasks to be created:
var firstTask = {
subject: “new task for new account” + accountUri,
“regardingobjectid_account_task@odata.bind”: accountUri
};
//Note: Imortant here
var secondTask = {
subject: “second task”,
“regardingobjectid_account_task@odata.bind”: accountUri
};
//Start of ChangeSet
payload = [“–batch_” + batchId]
payload.push(“Content-Type: multipart/mixed;boundary=changeset_” + changeSetId);
payload.push(“”);
//First item in ChangeSet
payload.push(“–changeset_” + changeSetId);
payload.push(“Content-Type: application/http”);
payload.push(“Content-Transfer-Encoding:binary”);
payload.push(“Content-ID: 1”);
payload.push(“”);
payload.push(“POST ” + CrmSdk.RBEIApi.getWebApiUrl() + “tasks HTTP/1.1”);
payload.push(“Content-Type: application/json;type=entry”);
payload.push(“”);
payload.push(JSON.stringify(firstTask));
//Second item in ChangeSet
payload.push(“–changeset_” + changeSetId);
payload.push(“Content-Type: application/http”);
payload.push(“Content-Transfer-Encoding:binary”);
payload.push(“Content-ID: 2”);
payload.push(“”);
payload.push(“POST ” +  CrmSdk.RBEIApi.getWebApiUrl() + “tasks TTP/1.1”);
payload.push(“Content-Type: application/json;type=entry”);
payload.push(“”);
payload.push(JSON.stringify(secondTask));
//End of ChangeSet
payload.push(“–changeset_” + changeSetId + “–“);
payload.push(“”);
//Adding a GET request outside of the ChangeSet
payload.push(“–batch_” + batchId);
payload.push(“Content-Type: application/http”);
payload.push(“Content-Transfer-Encoding:binary”);
payload.push(“”);
//Retrieve all the tasks related to the account
payload.push(“GET ” + accountUri + “/Account_Tasks?$select=subject HTTP/1.1”);
payload.push(“Accept: application/json”);
payload.push(“”);
payload.push(“–batch_” + batchId + “–“);
executeBatch(payload.join(“\r\n”), batchId, function (response) {
alert(response);
 
}, function (error) {
alert(error);
});
}
//Generating random id for Payload object
Function GetRandomId (idLength) {
if (this.isNullOrUndefined(idLength))
idLength = 10;
if (this.isNumber(idLength)) {
if (idLength > 30) {
throw new Error(“Length must be less than 30.”);
}
}
else {
throw new Error(“Length must be a number.”);
}
var returnValue = “”;
var characters = “ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789”;
for (var i = 0; i < idLength; i++)
returnValue += characters.charAt(Math.floor(Math.random() * characters.length));
return returnValue;
}

//create an empty array var payload = []; //push objects into that array payload.push('--batch_340293023'); payload.push('Content-Type......'); payload.push(''); //create the payload that you can use in the post message var postdata = payload.join('\r\n');

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