SAP Forms by Adobe使ってみた

/**
 * Authority EP Host
 */
const sAUTH_BASE_HOST    =   '<OAuth用Host>';

/**
 * OAuth Token EP
 */
const sTOKEN_URI        =   '/oauth2/api/v1/token'

/**
 * OAuth Client ID
 */
const sCLIENT_ID        =   '<OAuth用クライアントID>';

/**
 * OAuth Client Secret
 */
const sCLIENT_SECRET    =   '<OAuth用クライアントシークレット>';

/**
 * OAuth Grant Type
 */
const sGRANT_TYPE       =   'client_credentials';

/**
 * OAuth Grant Scope
 */
const sADS_SCOPE        =   'generate-ads-output';

/**
 * Forms by Adobe Base Host
 * https://adsrestapiformsprocessing-<yoursubaccount>.<yourregionhost:[xxx.]hana.ondemand.com>
 */
const sPDF_SRV_HOST      =   '<Rest API用Host>'
/**
 * PDF Generation URI
 */
const sPDF_RENDER_URI   =   '/ads.restapi/v1/adsRender/pdf'

/**
 * PDF Render parameter
 * The value means tepmlate file is read from SCP form/template storage.
 */
const sPDF_RENDER_PARAM =   '?templateSource=storageName'

/**
 * Generated PDF File Name in local PC
 * */
const sPDF_FILE_NAME    =   'test114.pdf'

/**
 * PDF data (XML)
 */
const sPDF_DATA         =
`<?xml version="1.0" encoding="UTF-8"?>     
<form1>                                    
    <Page1>                                 
        <Form1>                             
            <Text1>鬼瓦</Text1>         
            <Text2>ko-hei</Text2>   
            <Date1>20040606T101010</Date1>  
        </Form1>                            
    </Page1>                                
</form1>                                   
`;

/* Generate HTTP Client */
const fnRequest           =   require('request');

/* Generate Request Header */
let sAuthString         =   conv2Base64(sCLIENT_ID + ':' + sCLIENT_SECRET);

let oAuthHeaders        =   {
    "Content-Type"  : 'application/x-www-form-urlencoded',
    "Authorization" : 'Basic ' + sAuthString
};

let sAuthBody       = 'grant_type=' + sGRANT_TYPE + '&scope=' + sADS_SCOPE;

let oAuthOptions         =   {
    "url"       :   sAUTH_BASE_HOST + sTOKEN_URI,
    "method"    :   'POST',
    "headers"   :   oAuthHeaders,
    "body"      :   sAuthBody,
    "json"      :   true
};

/* Request token */
requestService('Authority', oAuthOptions, generatePDF);

/**
 * Convert string as base64 format.
 * @param   {String} sTarget 
 * @return  {String} Converted string as base64
 */
function conv2Base64(sTarget) {
    return  Buffer.from(sTarget).toString('base64');
}

/**
 * HTTP Request
 * @param {String} sLabel       Console label
 * @param {Object} oOptions     Request option
 * @param {Function} fnSuccess  Called function when the request is called sucessfully
 */
function requestService(sLabel, oOptions, fnSuccess) {
    fnRequest(oOptions, (oError, oResponse, oBody) => {
        console.log('<---- ' + sLabel + ' ---->');
        if (oError) {
            console.log(oError);
            return;
        } 

        console.log('Successed');
        fnSuccess(oResponse, oBody);
    });
}

/**
 * Get PDF file from SCP service.
 * @param {*} oResponse HTTP Response
 * @param {*} oBody     HTTP Response Body
 */
function generatePDF(oResponse, oBody)  {
    const sToken  =   oBody.access_token;

    let oPdfHeaders =   {
        "Content-Type"  : 'application/json',
        "Authorization" : 'Bearer ' + sToken
    };

    let oPdfBody   =   {
        "xdpTemplate"   : '<Form名>/<Tempalte名>', // 環境準備の4でULしたレイアウト
        "xmlData"       : conv2Base64(sPDF_DATA),
        "formType"      : 'Print',
        "formLocale"    : 'ja_JP',
        "taggedPdf"     : 0,
        "embedFont"     : 0
    };

    let oPdfOptions    =   {
        "url"       :   sPDF_SRV_HOST + sPDF_RENDER_URI + sPDF_RENDER_PARAM,
        "method"    :   'POST',  
        "headers"   :   oPdfHeaders,
        "body"      :   oPdfBody,
        "json"      :   true
    };

    requestService('PDF Generation', oPdfOptions, outputPDFFile)
}

/**
 * Output PDF to local pc from response body.
 * @param {*} oResponse 
 * @param {*} oBody 
 */
function outputPDFFile(oResponse, oBody) {
    const oFileIO = require('fs');
    console.log(oBody);
    if (oBody.fileContent) {
        let oBin_pdf    = Buffer.from(oBody.fileContent, 'base64');
        oFileIO.writeFile(sPDF_FILE_NAME, oBin_pdf, (err) => console.log(err));
    } else {
        console.log('PDF not generated.');
    }
}