apxtrib/api/middlewares/checkHeaders.js

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const conf = require(`${process.env.dirtown}/conf.json`);
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const checkHeaders = (req, res, next) => {
/**
* @apiDefine apxHeader
* @apiGroup Middleware
* @apiDescription Header is mandatory to access apxtrib see tribes/townconf.json.exposedHeaders
* A turn around can be done with a simple get params has to be sent in the get url. Usefull to send simple get without header like ?xworkon=tribeName&xlang=en... priority is given to headers
* For performance, tokens are store globaly in req.app.locals.tokens={xpaganid:xauth}
* if xlang is not in conf.languagesAvailable
*
* @apiHeader {string} xjwt Pagans unique jwt token store in local town Pagans data or "noauth"
* @apiHeader {string} xpseudo Pagans unique Pagan id in uuid format or "nouuid"
* @apiHeader {string} xlang the 2 letter langage it request the api (if not exist the 2 first letter of Accept-Language header ) if lang does not exist in the town then en is set (as it always exist in en).
* @apiHeader {string} xtribe Tribes id where pseudo want to act
* @apiHeader {string} xapp Name of www/xapp folder that host app that send the request
* /tribeid/person/xpseudo.json have accessright on this app store in /tribe/tribeid/www/xapp
*
* @apiError missingexposedHeaders it miss an exposedHeaders
*
* @apiErrorExample {json} Error-Response:
* HTTP/1/1 400 Not Found
* {
* status:400,
* ref:"headers"
* msg:"missingheaders",
* data: ["headermissing1"]
* }
*@apiErrorExample {json} Error-Response:
* HTTP/1/1 404 Not Found
* {
* status:404,
* ref:"headers"
* msg:"tribeiddoesnotexist",
* data: {xalias}
* }
*
* @apiHeaderExample {json} Header-Exemple:
* {
* xtribe:"apache",
* xalias:"toto",
* xhash:"",
* xdays:"123"
* xlang:"en",
* xapp:"popular"
* }
*/
req.session = {};
const header = {};
if (!req.header("xlang") && req.header("Content-Language"))
req.params.xlang = req.header("Content-Language");
let missingheader = [];
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//console.log("req.headers", req.headers);
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for (const h of conf.api.exposedHeaders) {
//console.log( h, req.header( h ) )
if (req.params[h]) {
header[h] = req.params[h];
} else if (req.header(h)) {
header[h] = req.header(h);
} else {
missingheader.push(h);
}
}
//console.log( 'header', header )
// store in session the header information
req.session.header = header;
// Each header have to be declared
if (missingheader != "") {
// bad request
return res.status(400).json({
ref: "headers",
msg: "missingheader",
data: missingheader,
});
}
//console.log( req.app.locals.tribeids )
// xtribe == "town" is used during the setup process
if (
!(
header.xtribe == "town" || req.app.locals.tribeids.includes(header.xtribe)
)
) {
return res.status(404).json({
ref: "headers",
msg: "tribeiddoesnotexist",
data: { xtribe: header.xtribe },
});
}
if (!conf.api.languages.includes(header.xlang)) {
console.log("warning language requested does not exist force to english");
header.xlang = "en";
}
next();
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};
module.exports = checkHeaders;