“错误:未设置操作输入”代码在运行于AWS lambda的nodejs中

Question

我纯粹是nodejs的新手。我试图使用Adobe服务提供的pdf将PDF导出到docx。我从nodejs (Python不适合这里)获得了很少的在线代码来实现这一点。我在AWS S3中有文件，需要将文件导出到docx中。我对代码做了一些小改动。当我尝试运行这个的时候。它抛出一个异常为：“执行操作时遇到的异常-2错误:没有为操作设置输入”需要一些帮助或建议来克服这一点。

/*
 * Copyright 2019 Adobe
 * All Rights Reserved.
 *
 * NOTICE: Adobe permits you to use, modify, and distribute this file in
 * accordance with the terms of the Adobe license agreement accompanying
 * it. If you have received this file from a source other than Adobe,
 * then your use, modification, or distribution of it requires the prior
 * written permission of Adobe.
 */
// Lambda handler code //
console.log('Loading function');
exports.handler = async (event, context) => {
    console.log('Loading function');
    const PDFServicesSdk = require('@adobe/pdfservices-node-sdk');
    
    // Start reading the file from s3//
    const aws = require('aws-sdk');
    //const s3 = new aws.S3({ apiVersion: '2006-03-01' });
    const bucket = 'translation-bucket-qa-v1';
    const key = 'TranslationPipeline/input_pdf_img/Gas_bill_sample.pdf'
    const filename = 'Gas_bill_sample.pdf'
    /*
    const params = {
        Bucket: bucket,
        Key: key,
    };
    
    try {
        const { ContentType } = await s3.getObject(params).promise();
        console.log('CONTENT TYPE:', ContentType);
        return ContentType;
    } catch (err) {
        console.log(err);
        const message = 'Error getting object ${key} from bucket ${bucket}. Make sure they exist and your bucket is in the same region as this function.';
        console.log(message);
        throw new Error(message);
    }*/
    
    
    //Reading the file ends here !!!!///

    /**
     * This sample illustrates how to export a PDF file to a Word (DOCX) file
     * <p>
     * Refer to README.md for instructions on how to run the samples.
     */

    try {
        // Initial setup, create credentials instance.
        const credentials =  PDFServicesSdk.Credentials
            .serviceAccountCredentialsBuilder()
            .fromFile("pdfservices-api-credentials.json")
            .build();
        
        //Create an ExecutionContext using credentials and create a new operation instance.
        const executionContext = PDFServicesSdk.ExecutionContext.create(credentials),
            exportPDF = PDFServicesSdk.ExportPDF,
            exportPdfOperation = exportPDF.Operation.createNew(exportPDF.SupportedTargetFormats.DOCX);

        /* Commenting it to test s3 read//
        
        // Set operation input from a source file
        const input = PDFServicesSdk.FileRef.createFromLocalFile('resources/exportPDFInput.pdf'); //about input
        exportPdfOperation.setInput(input);
        
        / Commenting it to test s3 read*/
        
        //Download  from s3 //
        const filePath = '/tmp/';
        var s3 = new aws.S3();
        
        const downloadFile = (filePath, bucket, key) => {
            const params = {
                    Bucket: bucket,
                    Key: key
                    };
            s3.getObject(params, (err, data) => {
                if (err) console.error(err);
                fs.writeFileSync(filePath, data.Body.toString());
                console.log(`${filePath} has been created!`);
                });
                };
        
        console.log('File downloaded')
        //Changed till here//
        
        // Execute the operation and Save the result to the specified location.
        exportPdfOperation.execute(executionContext)
            .then(result => result.saveAsFile(filePath+'exportPdfOutput.docx')) // about output
            .catch(err => {
                if(err instanceof PDFServicesSdk.Error.ServiceApiError
                    || err instanceof PDFServicesSdk.Error.ServiceUsageError) {
                    console.log('Exception encountered while executing operation -1', err);
                } else {
                    console.log('Exception encountered while executing operation-2', err);
                }
            });
        console.log('File is in temp')
    } catch (err) {
        console.log('Exception at first try', err);
    }
};

请帮忙，让我知道你还需要什么信息。在此抛出异常“执行操作-2时遇到的异常”。

Answer 1

这是一个异步问题。在调用我们的(Adobe)之前，需要确保文件完全从S3下载。您正在调用操作，但没有等待操作完成。所以基本上--等待s3完成-然后调用我们的API。