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Mail Merge Word Document and Convert output to PDF in Node

Aspose.Words Cloud Product Family
#1

I am trying to do a mail merge, but I need the resulting output to be a PDF. So I am trying to take the result of the merge, and pass it to the convert function, but I am running into the following error:

body: WordsApiErrorResponse {
    error: ApiError {
      message: 'Unexpected end of Stream, the content may have already been read by another component. '
    }
}

Here is the code:

const wordsApi = new WordsApi(clientId, secret);

let requestTemplate = fs.createReadStream("TestExecuteTemplate.docx");
let requestData = fs.createReadStream("TestExecuteTemplateData.json");

const mailMergeRequest = new ExecuteMailMergeOnlineRequest({
    template: requestTemplate,
    data: requestData,
    withRegions: true
});

wordsApi.executeMailMergeOnline(mailMergeRequest)
.then((mailMergeRequestResult) => {
    console.log("merge complete");
    const convertRequest = new ConvertDocumentRequest({
        document: Readable.from(mailMergeRequestResult.body),
        format: "pdf"
    });
    wordsApi.convertDocument(convertRequest)
    .then((convertRequestResult) => {
        console.log("convert complete");
        fs.writeFile('output.pdf', convertRequestResult.body, function (err) {
            if (err) return console.log(err);
            console.log('file saved');
        });
    })
    .catch((err) => {
        console.log(err);
    });

})
.catch((err) => {
    console.log(err);
});

What should I be doing differently?

#2

@danobri

Please amend the convertRequest code as following, it will fix the issue.

 const convertRequest = new ConvertDocumentRequest({
        //document: Readable.from(mailMergeRequestResult.body),
	document: mailMergeRequestResult.body,
	format: "pdf"
    });
#3

That doesn’t work, as it’s a type mismatch - body is a Buffer, and document is a Readable.

image.png (67.7 KB)

#4

The file conversion does complete successfully without Readable.from(), but it causes the type mismatch shown in the screenshot. So maybe there is something not quite right about the typings file?

#5

@danobri

Thanks for your feedback. We have logged an internal ticket WORDSCLOUD-1747 for more investigation. We will share the results with you asap.