How to download Salesforce files From community? LWC

Question

Apex :

private static final String  BASE_URL = URL.getSalesforceBaseUrl().toExternalForm();
@AuraEnabled
public static List<FileData> telechargerConv(String recordId){
  List<ContentDocumentLink> links=[SELECT ContentDocumentId,LinkedEntityId FROM ContentDocumentLink where LinkedEntityId=:recordId];
    Set<Id> ids=new Set<Id>();
    for(ContentDocumentLink link:links)
    {
        ids.add(link.ContentDocumentId);
    }
    List<ContentVersion> versions=[SELECT VersionData,Title,ContentDocumentId,FileExtension FROM ContentVersion WHERE ContentDocumentId = :ids AND IsLatest = true];
    
    List<FileData> files=new List<FileData>();
    for(ContentVersion attach:versions)
     {
        FileData data=new FileData();
        if(versions!=null && versions.size()>0)
        {
            data.Content = EncodingUtil.base64Encode(versions[0].VersionData);
            data.ContentType = ContentType(versions[0].FileExtension);
        }
        data.DownloadUrl =BASE_URL + '/sfc/servlet.shepherd/document/download/'+versions[0].ContentDocumentId;
        data.FileUrl =BASE_URL + '/sfc/servlet.shepherd/version/renditionDownload?rendition=THUMB720BY480&versionId='+versions[0].Id;
        files.add(data);
    }
    return files;
}
@AuraEnabled
public static string ContentType(string fileType)
{
    switch on fileType.toLowerCase()
    {
        when 'docx'
        {
            return 'application/vnd.openxmlformats-officedocument.wordprocessingml.document';
        }
        when 'csv'
        {
            return 'application/vnd.ms-excel';
        }
        when 'wav'
        {
            return 'audio/wav';
        }
        when 'wmv'
        {
            return 'video/x-ms-wmv';
        }
        when 'mp3'
        {
            return 'audio/mpeg';
        }
        when 'mp4'
        {
            return 'video/mp4';
        }
        when 'png'
        {
            return 'image/png';
            
        }
        when 'pdf'
        {
            return 'application/pdf';
            
        }
        when else {
            return 'image/jpeg';
        }
    }
}
public class FileData 
{
    @AuraEnabled
    public string Content{get;set;}
    @AuraEnabled
    public string ContentType{get;set;}
    @AuraEnabled
    public string FileUrl{get;set;}
    @AuraEnabled
    public string DownloadUrl{get;set;}
}

JS :

telechargerConv({ recordId : currentRow }).then(result => {

        console.log('download',result);
    })

i retrieve well my files :

But i'm stuck on how to run the Url and download the files ..

The URL should be like this in order to download file in community ?????:

https://DOMAIN.sandbox.lightning.force.com/sfc/servlet.shepherd/document/download/FILEID

Answer 1

You have run a loop on your result and navigate to download url using window.open like this:-

telechargerConv({ recordId : currentRow }).then(result => {
    result.forEach(element => {
        window.open(element.DownloadUrl, '_blank');
    });
})

This will open a new tab, download the file and close it automatically for each of the item in your result.

---

Update

the download url should look like this:-

https://db0000000dzqemau-dev-ed.develop.lightning.force.com/sfc/servlet.shepherd/version/download/068B000000BU4wNIAT?operationContext=S1

i.e window.location.origin +'/sfc/servlet.shepherd/version/download/'+ version id+'?operationContext=S1'

you need to make sure you have download url as above format

Again Update

if you are in community, then your url should be like this:-

String fileDownloadUrl = URL.getSalesforceBaseUrl().toExternalForm()  + '/sfc/servlet.shepherd/document/download/' + contentDocument Id + '?operationContext=S1';

the only difference i can see in your code is you are missing '?operationContext=S1' in url

Another way of accessing the download url is using contentdistribution object

sample example can be found here:- https://gist.github.com/lukethacoder/818d4dba3f7fb00ea861a76fe85fc1a3