Kaizen #44 - Handling Attachments API in Java and Java SDK (Part 1/2)

Kaizen #44 - Handling Attachments API in Java and Java SDK (Part 1/2)

Hello everyone!

Welcome back to yet another post in the Kaizen series.
This week, we will discuss about the attachments API in Java and Java SDK.

1. Introduction to Attachments API

Attachments in Zoho CRM are an important aspect of any record as they add additional information in the form of documents such as Marketing Collateral, Sales Quotes/Orders/Invoices, SLA and etc to the existing record. A record can contain multiple attachments. However, the attachments hold a maximum limit per record. The attachment limit per record is 100Mb. It can be either a single file or multiple files. In the case of multiple files, the total file size of the multiple files must not exceed 100Mb. The allowable limit for an image is 10Mb, and the resolution is 10megapixel. 

Let's discuss some important details concerning the attachments API. 
i. While uploading an attachment or an image through a curl request, the image must be included in the request with the content type as multipart/form-data

ii. The oauth scopes required for attachment API : 
ZohoCRM.modules.all 
(or) 
ZohoCRM.modules.{module_name}.{operation_type}
(and) 
ZohoCRM.modules.attachments.all

iii. The possible oauth scope module_names are: 
leads, accounts, contacts, deals, campaigns, tasks, cases, events, calls, solutions, products, vendors, pricebooks, quotes, salesorders, purchaseorders, invoices, custom, and notes.

2. Operations in the Attachments API

The attachments API in Zoho CRM allows a user to get a list of attachments, upload or download a file and delete them as well. Our focus for this week will be on executing the following operations using Java's HTTP client and CRM's Java SDK.
a. List attachments
b. Upload attachments

a. List Attachments

To get the list of attachments of a specific record. 

Request method:  GET
Request URL:  
{{api-domain}}/crm/v2/{module_api_name}/{record_id}/attachments

Sample URL:
{{api-domain}}/crm/v2/Leads/3719520000000659047/attachments

Java SDK Code -
In Java SDK, we employ the getAllAttachmentsDetails() method to fetch all the necessary details. We will need the record_id for whom the attachment details are fetched. Here, the record_id provided is 3719520000000659047. After fetching the details, we iterate over the response and just print the necessary details. 
public void getAllAttachmentsDetails() throws Exception {
              ZCRMRecord record=ZCRMRecord.getInstance("Leads",3719520000000659047L); 
 int page=1;
              int per_page=200;
 BulkAPIResponse responseIn=record.getAllAttachmentsDetails(page, per_page,null);
        List <ZCRMAttachment> attchments=(List<ZCRMAttachment>)responseIn.getData(); 
        if(attchments!=null) 
        {
            for(ZCRMAttachment attchmentIns : attchments)
            {
                System.out.println(attchmentIns.getId()); 
                System.out.println(attchmentIns.getFileName()); 
                System.out.println(attchmentIns.getFileType());
                System.out.println(attchmentIns.getSize()); 
                ZCRMRecord parentRecord1=attchmentIns.getParentRecord();
                System.out.println(parentRecord1.getEntityId());
                ZCRMUser createdBy1=attchmentIns.getCreatedBy();
                System.out.println(createdBy1.getId()); 
                System.out.println(createdBy1.getFullName());
                ZCRMUser modifiedBy1=attchmentIns.getModifiedBy();
                System.out.println(modifiedBy1.getId()); 
                System.out.println(modifiedBy1.getFullName());
                ZCRMUser owner1=attchmentIns.getOwner();
                System.out.println(owner1.getId()); 
                System.out.println(owner1.getFullName()); 
                System.out.println(attchmentIns.getCreatedTime()); 
                System.out.println(attchmentIns.getModifiedTime()); 
            }
        }
}


Java Code 
In the absence of Java SDK, we make a GET request to the mentioned URL and display the response.
public void getAllAttachmentDetails() throws Exception
 {
  CloseableHttpClient httpclient = HttpClients.createDefault();
     HttpGet httpget = new HttpGet("{{api-domain}}/crm/v2/Leads/3719520000000659047/attachments");
     httpget.addHeader("Authorization", "Zoho-oauthtoken 1000.9XXX.6XXX");
     System.out.println("Request Type: "+httpget.getMethod());
     HttpResponse httpresponse = httpclient.execute(httpget);
     Scanner sc = new Scanner(httpresponse.getEntity().getContent());
     System.out.println(httpresponse.getStatusLine());
     while(sc.hasNext()) {
          System.out.println(sc.nextLine());
     }
 }


Sample Response
{
    "data": [
        {
            "Owner": {
                "name": "Patricia Boyle",
                "id": "3719520000000191015",
                "email": "patricia.boyle@zohocorp.com"
            },
            "Modified_Time": "2020-08-12T10:28:07+05:30",
            "File_Name": "testimg.jpg",
            "Created_Time": "2020-08-12T10:28:07+05:30",
            "Size": "120335",
            "Parent_Id": {
                "name": "Johnson Charles",
                "id": "3719520000000659047"
            },
            "$editable": true,
            "$file_id": "8urshba63343dcc7b41418d74eeca1d4c323e",
            "$type": "Attachment",
            "$se_module": "Leads",
            "Modified_By": {
                "name": "Patricia Boyle",
                "id": "3719520000000191015",
                "email": "patricia.boyle@zohocorp.com"
            },
            "$state": "save",
            "id": "3719520000000981001",
            "Created_By": {
                "name": "Patricia Boyle",
                "id": "3719520000000191015",
                "email": "patricia.boyle@zohocorp.com"
            },
            "$link_url": null
        }
    ],
    "info": {
        "per_page": 200,
        "count": 2,
        "page": 1,
        "more_records": false
    }
}

b. Upload Attachments

To attach a file to a record.

Request method :  POST
Request URL:
{{api-domain}}/crm/v2/{module_api_name}/{record_id}/attachments

Sample URL: 
{{api-domain}}/crm/v2/Leads/3719520000000659047/attachments

Java SDK Code
For uploadAttachment(), we need the record_id and the file to upload as a pre-requisite. We employ the uploadAttachment() to upload our file to the record.
public void uploadAttachment() throws Exception{
  ZCRMRecord record=ZCRMRecord.getInstance("Leads",3719520000000659047L); 
  APIResponse responseIn=record.uploadAttachment("/Users/srivathsan-8829/Downloads/record.txt"); 
  System.out.println( "Status:"+ responseIn.getMessage()); 
        System.out.println( "Message:"+ responseIn.getStatus()); 
        System.out.println("http code"+ responseIn.getStatusCode()); 
        System.out.println( " Code:"+responseIn.getResponseJSON().toString());
 }


Java Code 

Uploading an attachment to a record in Java without Java SDK can be a tedious task. As shown below, the request needs to be multipart request. 

public void uploadAttachments() throws Exception
 {
    CloseableHttpClient httpclient = HttpClients.createDefault();
       File file = new File("/Users/srivathsan-8829/Downloads/record.txt");
       FileBody filebody = new FileBody(file, ContentType.DEFAULT_BINARY);
       MultipartEntityBuilder entitybuilder = MultipartEntityBuilder.create();
       entitybuilder.setMode(HttpMultipartMode.BROWSER_COMPATIBLE);
       HttpEntity mutiPartHttpEntity = entitybuilder.build();
       RequestBuilder reqbuilder = RequestBuilder.post("{{api-domain}}/crm/v2/Leads/3719520000000659047/attachments");
       reqbuilder.setEntity(mutiPartHttpEntity);
       reqbuilder.addHeader("Authorization", "Zoho-oauthtoken 1000.9XXX.6XXX");
       HttpUriRequest multipartRequest = reqbuilder.build();
       HttpResponse httpresponse = httpclient.execute(multipartRequest);
       System.out.println(EntityUtils.toString(httpresponse.getEntity()));
       System.out.println(httpresponse.getStatusLine());
 }

Sample Response
{
    "data": [
        {
            "code": "SUCCESS",
            "details": {
                "Modified_Time": "2020-08-12T10:28:07+05:30",
                "Modified_By": {
                    "name": "Patricia Boyle",
                    "id": "3719520000000191015"
                },
                "Created_Time": "2020-08-12T10:28:07+05:30",
                "id": "3719520000000981001",
                "Created_By": {
                    "name": "Patricia Boyle",
                    "id": "3719520000000191015"
                }
            },
            "message": "attachment uploaded successfully",
            "status": "success"
        }
    ]
}

Note :-
FILE_SIZE_MORE_THAN_ALLOWED_SIZE - This error is specific to the attachments API which is returned when you try to upload an attachment/photo exceeding the allowed size.

We hope you found this post useful. In our next kaizen post, we will discuss how to download and delete an attachment via Java HTTP Client and Java SDK. Let us know your thoughts in the comment section or reach us out at support@zohocrm.com.

Cheers!







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