Re: [go-nuts] Html is not parsing while parsing a template to send email

[Jakob Borg]

Like this;

https://play.golang.org/p/VVIOY7s9xQq

//jb

On 4 May 2018, at 13:32, Amandeep Kaur 
<amandeepkaur4...@gmail.com<mailto:amandeepkaur4...@gmail.com>> wrote:


Hi, Jakob Borg

Thanks for ypur reply to the post. The solution you have provided can not be 
implemented on my system. I have provided a small sample of my code structure. 
Please take a look

type EmailTemplate struct{
        BookingDetails                 string
    }

    type EmailRequest struct{
        EmailTo      string
        EmailBody      string
    }

    // get saved html with tokens from database
    notificationTemplate, errVal := merchantDb.GetNotificationTemplate()
    request := EmailRequest{
        "t...@example.com<mailto:t...@example.com>",
        notificationTemplate.Content,
    }
    templateData.BookingDetails += 
"<p><span>Industry</span><span>"+industry.IndustryName+"</span></p>"

    request.EmailSend(templateData)


    func (request *EmailRequest) EmailSend(notificationTemplateData 
interface{}) (bool, error) {
        body, errParse := ParseTemplate(request.EmailBody, 
notificationTemplateData)
        //email sending code here
    }

    func ParseTemplate(templateHtml string, data interface{}) (string, error) {
        var body string
        t, err := template.New("my_template").Parse(templateHtml)
        if err != nil {
            return body, err
        }
        buf := new(bytes.Buffer)

        if err = t.Execute(buf, data); err != nil {
            return body, err
        }
        body = buf.String()
        return body, nil
    }

Where templateHtml is the email body with tokens and data is the interface 
holding dynamic values for these tokens.
When I use ParseTemplate function to parse tokens as string values then it 
works fine.
But if I have to parse html in one of my tokens then it parses html as string 
and in email displays html as string.

How ever If I try to make assertion on it from interface to template.HTML, it 
gives me error:
cannot convert notificationTemplateData (type interface {}) to type 
"html/template".HTML: need type assertion
On Friday, May 4, 2018 at 2:18:51 PM UTC+5:30, Jakob Borg wrote:
Hi,

Your post is a bit confusing and I think you may be using the word "parse" in 
the opposite of it its common meaning. However, if you want to pass a HTML 
fragment through a HTML template and have it not be escaped, look at the 
template.HTML type: https://golang.org/pkg/html/template/#HTML

//jb

On 4 May 2018, at 10:42, Amandeep Kaur 
<amandeep...@gmail.com<http://gmail.com/>> wrote:

Hello,

I am working on a SAAS based project for which I need to send emails to 
different clients on different events.

I am using email templates which use tokens (in format {{.TOKENNAME}}) that are 
made dynamic while sending emails. Now these token are parsed by using 
"html/template" package.

following is the custom function that I have made to parse these tokens into 
email body.

func ParseTemplate(templateHtml string, data interface{}) (string, error) {
    var body string
    t, err := template.New("my_template").Parse(templateHtml)
    if err != nil {
        return body, err
    }
    buf := new(bytes.Buffer)

    if err = t.Execute(buf, data); err != nil {
        return body, err
    }
    body = buf.String()
    return body, nil
}

Where templateHtml is the email body with tokens and data is the interface 
holding dynamic values for these tokens. When I use ParseTemplate function to 
parse tokens as string values then it works fine. But if I have to parse html 
in one of my tokens then it parses html as string and in email displays html as 
string.

Can anybody tell me what should I do to parse html in ParseTemplate function??

Thanks!

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