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index.js
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index.js
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/**
* koa-body - index.js
* Copyright(c) 2014
* MIT Licensed
*
* @author Daryl Lau (@dlau)
* @author Charlike Mike Reagent (@tunnckoCore)
* @api private
*/
'use strict';
/**
* Module dependencies.
*/
const buddy = require('co-body');
const forms = require('formidable');
const symbolUnparsed = require('./unparsed.js');
/**
* Expose `requestbody()`.
*/
module.exports = requestbody;
/**
*
* @param {Object} options
* @see https://github.com/dlau/koa-body
* @api public
*/
function requestbody(opts) {
opts = opts || {};
opts.onError = 'onError' in opts ? opts.onError : false;
opts.patchNode = 'patchNode' in opts ? opts.patchNode : false;
opts.patchKoa = 'patchKoa' in opts ? opts.patchKoa : true;
opts.multipart = 'multipart' in opts ? opts.multipart : false;
opts.urlencoded = 'urlencoded' in opts ? opts.urlencoded : true;
opts.json = 'json' in opts ? opts.json : true;
opts.text = 'text' in opts ? opts.text : true;
opts.encoding = 'encoding' in opts ? opts.encoding : 'utf-8';
opts.jsonLimit = 'jsonLimit' in opts ? opts.jsonLimit : '1mb';
opts.jsonStrict = 'jsonStrict' in opts ? opts.jsonStrict : true;
opts.formLimit = 'formLimit' in opts ? opts.formLimit : '56kb';
opts.queryString = 'queryString' in opts ? opts.queryString : null;
opts.formidable = 'formidable' in opts ? opts.formidable : {};
opts.includeUnparsed = 'includeUnparsed' in opts ? opts.includeUnparsed : false
opts.textLimit = 'textLimit' in opts ? opts.textLimit : '56kb';
opts.strict = 'strict' in opts ? opts.strict : true;
return function (ctx, next) {
var bodyPromise;
// so don't parse the body in strict mode
if (!opts.strict || ["GET", "HEAD", "DELETE"].indexOf(ctx.method.toUpperCase()) === -1) {
try {
if (opts.json && ctx.is('json')) {
bodyPromise = buddy.json(ctx, {
encoding: opts.encoding,
limit: opts.jsonLimit,
strict: opts.jsonStrict,
returnRawBody: opts.includeUnparsed
});
} else if (opts.urlencoded && ctx.is('urlencoded')) {
bodyPromise = buddy.form(ctx, {
encoding: opts.encoding,
limit: opts.formLimit,
queryString: opts.queryString,
returnRawBody: opts.includeUnparsed
});
} else if (opts.text && ctx.is('text')) {
bodyPromise = buddy.text(ctx, {
encoding: opts.encoding,
limit: opts.textLimit,
returnRawBody: opts.includeUnparsed
});
} else if (opts.multipart && ctx.is('multipart')) {
bodyPromise = formy(ctx, opts.formidable);
}
} catch (parsingError) {
if (typeof opts.onError === 'function') {
opts.onError(parsingError, ctx);
} else {
throw parsingError;
}
}
}
bodyPromise = bodyPromise || Promise.resolve({});
return bodyPromise.catch(function(parsingError) {
if (typeof opts.onError === 'function') {
opts.onError(parsingError, ctx);
} else {
throw parsingError;
}
return next();
})
.then(function(body) {
if (opts.patchNode) {
if (isMultiPart(ctx, opts)) {
ctx.req.body = body.fields;
ctx.req.files = body.files;
} else if (opts.includeUnparsed) {
ctx.req.body = body.parsed || {};
if (! ctx.is('text')) {
ctx.req.body[symbolUnparsed] = body.raw;
}
} else {
ctx.req.body = body;
}
}
if (opts.patchKoa) {
if (isMultiPart(ctx, opts)) {
ctx.request.body = body.fields;
ctx.request.files = body.files;
} else if (opts.includeUnparsed) {
ctx.request.body = body.parsed || {};
if (! ctx.is('text')) {
ctx.request.body[symbolUnparsed] = body.raw;
}
} else {
ctx.request.body = body;
}
}
return next();
})
};
}
/**
* Check if multipart handling is enabled and that this is a multipart request
*
* @param {Object} ctx
* @param {Object} opts
* @return {Boolean} true if request is multipart and being treated as so
* @api private
*/
function isMultiPart(ctx, opts) {
return opts.multipart && ctx.is('multipart');
}
/**
* Donable formidable
*
* @param {Stream} ctx
* @param {Object} opts
* @return {Promise}
* @api private
*/
function formy(ctx, opts) {
return new Promise(function (resolve, reject) {
var fields = {};
var files = {};
var form = new forms.IncomingForm(opts);
form.on('end', function () {
return resolve({
fields: fields,
files: files
});
}).on('error', function (err) {
return reject(err);
}).on('field', function (field, value) {
if (fields[field]) {
if (Array.isArray(fields[field])) {
fields[field].push(value);
} else {
fields[field] = [fields[field], value];
}
} else {
fields[field] = value;
}
}).on('file', function (field, file) {
if (files[field]) {
if (Array.isArray(files[field])) {
files[field].push(file);
} else {
files[field] = [files[field], file];
}
} else {
files[field] = file;
}
});
if (opts.onFileBegin) {
form.on('fileBegin', opts.onFileBegin);
}
form.parse(ctx.req);
});
}