Hi,

I’m running an API Call to upload a PDF file to Box. I get the PDF URL from another API call to another software, and then input the URL into this apex class, it downloads it and uploads it into Box folder of specific folder Id which I input. For some reason, everything works, but the file that comes into Box is not PDF and is of unsupported file type (can’t be opened or downloaded). Can anyone find what my error could possibly be? 

public class HV_BoxPDFUploader {
    @InvocableMethod(label='Upload PDF to Box' description='Uploads a PDF from a URL to Box using Box Toolkit')
    public static List<Result> uploadPDFToBox(List<Request> requests) {
        List<Result> results = new List<Result>();
        
        for (Request req : requests) {
            Result res = new Result();
            try {
                // Download PDF content
                Http http = new Http();
                HttpRequest pdfRequest = new HttpRequest();
                pdfRequest.setEndpoint(req.pdfUrl);
                pdfRequest.setMethod('GET');
                HttpResponse pdfResponse = http.send(pdfRequest);
                
                if (pdfResponse.getStatusCode() == 200) {
                    Blob pdfContent = pdfResponse.getBodyAsBlob();
                    
                    String fileName = req.fileName != null ? req.fileName : 'document.pdf';
                    String parentFolderId = req.parentFolderId != null ? req.parentFolderId : '0';
                    
                    String boundary = '---------------------------' + String.valueOf(DateTime.now().getTime());
                    
                    String attributes = '{"name":"' + fileName + '", "parent":{"id":"' + parentFolderId + '"}, "content_type":"application/pdf"}';
                    
                    String body = '--' + boundary + '\r\n' +
                        'Content-Disposition: form-data; name="attributes"\r\n\r\n' +
                        attributes + '\r\n' +
                        '--' + boundary + '\r\n' +
                        'Content-Disposition: form-data; name="file"; filename="' + fileName + '"\r\n' +
                        'Content-Type: application/pdf\r\n\r\n';
                    
                    Blob completeBody = Blob.valueOf(body);
                    completeBody = Blob.valueOf(completeBody.toString() + EncodingUtil.base64Encode(pdfContent));
                    completeBody = Blob.valueOf(completeBody.toString() + '\r\n--' + boundary + '--\r\n');
                    
                    HttpRequest uploadRequest = new HttpRequest();
                    uploadRequest.setEndpoint('https://upload.box.com/api/2.0/files/content');
                    uploadRequest.setHeader('Content-Type', 'multipart/form-data; boundary=' + boundary);
                    uploadRequest.setBodyAsBlob(completeBody);
                    uploadRequest.setMethod('POST');
                    
                    Box.Toolkit boxToolkit = new Box.Toolkit();
                    HttpResponse uploadResponse = boxToolkit.sendRequest(uploadRequest);
                    
                    if (uploadResponse.getStatusCode() == 201) {
                        Map<String, Object> responseMap = (Map<String, Object>)JSON.deserializeUntyped(uploadResponse.getBody());
                        List<Object> entries = (List<Object>)responseMap.get('entries');
                        Map<String, Object> fileInfo = (Map<String, Object>)entries'0];
                        String fileId = (String)fileInfo.get('id');
                        
                        res.success = true;
                        res.message = 'PDF uploaded successfully to Box';
                        res.boxFileId = fileId;
                    } else {
                        res.success = false;
                        res.message = 'Failed to upload PDF to Box. Status code: ' + uploadResponse.getStatusCode();
                    }
                } else {
                    res.success = false;
                    res.message = 'Failed to download PDF from provided URL. Status code: ' + pdfResponse.getStatusCode();
                }
            } catch (Exception e) {
                res.success = false;
                res.message = 'Error: ' + e.getMessage();
            }
            results.add(res);
        }
        
        return results;
    }
    
    public class Request {
        @InvocableVariable(required=true label='PDF URL' description='The URL of the PDF to upload to Box')
        public String pdfUrl;
        
        @InvocableVariable(required=false label='File Name' description='The name to give the uploaded file (without .pdf extension)')
        public String fileName;
        
        @InvocableVariable(required=false label='Parent Folder ID' description='The ID of the parent folder in Box (default is root folder)')
        public String parentFolderId;
    }
    
    public class Result {
        @InvocableVariable(label='Success' description='Indicates if the operation was successful')
        public Boolean success;
        
        @InvocableVariable(label='Message' description='Detailed message about the operation')
        public String message;
        
        @InvocableVariable(label='Box File ID' description='ID of the uploaded file in Box')
        public String boxFileId;
    }
}