@sap/xsodata/lib/processor/errorProcessor.js

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

'use strict';

//Include
var json = require('./../serializer/jsonSerializer');
var HttpError = require('./../utils/errors/httpError');
var configuration = require('./../configuration');

//Code
//
exports.process = function (context, error) {
    var content, serializer;

    context.logger.silly('error processor', 'process');
    context.payloadType = 'application/json';

    if (error.statusCode === 304) {
        // In case of "304 Not modified" message
        serializer = new json.JsonSerializer(context, 0, 304);
        serializer.flush();
        return;
    }

    const stringStatusCode = error.statusCode ? ('' + error.statusCode) : null;
    if (context.mode === configuration.modes.development) {
        context.logger.debug('error processor', 'in dev mode');
        content = {
            error: {
                code: stringStatusCode ||  '500',
                message: {
                    lang: 'en-US',
                    value: error.message,
                    stack: error.stack
                }
            }
        };
    } else {
        if (error instanceof HttpError) {
            content = {
                error: {
                    code: stringStatusCode || '500',
                    message: {
                        lang: 'en-US',
                        value: error.message
                    }
                }
            };
            if (error.innerError) {
                if (error.innerError instanceof Error) {
                    content.error.innererror = error.innerError.message;
                } else {
                    content.error.innererror = error.innerError;
                }
            }
        } else {
            content = {
                error: {
                    code: '500',
                    message: {
                        lang: 'en-US',
                        value: error.message
                    }
                }
            };
        }
    }

    context.logger.silly('error processor', 'content' + JSON.stringify(content));

    serializer = new json.JsonSerializer(context, 65536, content.error.code);

    serializer.write(content);
    serializer.flush();
};