@sap/xsodata/lib/serializer/content.js

Expose data from a HANA database as OData V2 service with help of .xsodata files.

'use strict';
//SAPINFO atom response format not supported yet
const utils = require('./../utils/utils');

const XMLWriter = require('xml-writer');

const XMLSerializer = function XMLSerializer(context, bufferSize) {
    const self = this;

    this.context = context;

    self.response = context.response;
    self.bufferSize = bufferSize;
    self.buffer = '';
    const writer = function writer(string) {
        self.buffer += string;
        if (self.buffer.length > bufferSize) {
            self.response.write(self.buffer);
            self.buffer = '';
        }
    };

    this.baseUrl = context.uriTree.baseUrl;

    this.xw = new XMLWriter(false, writer); //change to false for unformatted output
};

XMLSerializer.prototype.flush = function () {
    this.context.response.write(this.buffer);
    this.buffer = '';
};

XMLSerializer.prototype.writeXMLHeader = function () {
    this.xw.startDocument('1.0', 'utf-8', true);
};

XMLSerializer.prototype.writeFeedHeader = function () {
    this.xw.startElement('feed');

    this.xw.writeAttribute('xml:base', utils.ensureSlashEnding(this.baseUrl));
    this.xw.writeAttribute(
        'xmlns:d',
        'http://schemas.microsoft.com/ado/2007/08/dataservices'
    );
    this.xw.writeAttribute(
        'xmlns:m',
        'http://schemas.microsoft.com/ado/2007/08/dataservices/metadata'
    );
    this.xw.writeAttribute('xmlns', 'http://www.w3.org/2005/Atom');
};

XMLSerializer.prototype.writeTitleIdAuthor = function (title, id) {
    this.xw.startElement('title');
    this.xw.writeAttribute('type', 'text');
    this.xw.text(title);
    this.xw.endElement();

    this.xw.startElement('id');
    this.xw.text(this.baseUrl + id);
    this.xw.endElement();
    this.xw.startElement('author');
    this.xw.startElement('name');
    this.xw.endElement();
    this.xw.endElement();
};

XMLSerializer.prototype.writeFeedFooter = function () {
    this.xw.endElement();
};

XMLSerializer.prototype.writeEntryHeader = function () {
    this.xw.startElement('entry');

    this.xw.writeAttribute('xml:base', this.baseUrl);
    this.xw.writeAttribute('xmlns:atom', 'http://www.w3.org/2005/Atom');
    this.xw.writeAttribute('xmlns:app', 'http://www.w3.org/2007/app');
    this.xw.writeAttribute('xmlns', 'http://www.w3.org/2007/app');
};

XMLSerializer.prototype.writeEntryFooter = function () {
    this.xw.endElement();
};
XMLSerializer.prototype.writeLink = function (ref, type, title, href) {
    this.xw.startElement('link');
    this.xw.writeAttribute('rel', ref);
    if (type) {
        this.xw.writeAttribute('type', type);
    }
    this.xw.writeAttribute('title', title);
    this.xw.writeAttribute('href', href);
    this.xw.endElement();
};

XMLSerializer.prototype.writeCategory = function (term, schema) {
    this.xw.startElement('category ');
    this.xw.writeAttribute('term', term);
    this.xw.writeAttribute('schema', schema);
    this.xw.endElement();
};

exports.XMLSerializer = XMLSerializer;