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101 lines (90 loc) · 2.63 KB
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Copy pathresponse.js
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101 lines (90 loc) · 2.63 KB
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'use strict';
const getType = require('cache-content-type');
const isJSON = require('koa-is-json');
const REAL_STATUS = Symbol('Context#realStatus');
module.exports = {
/**
* Get or set the length of content.
*
* For Get: If the original content length is null or undefined, it will read out
* the body's content length as the return value.
*
* @member {Number} Response#type
* @param {Number} len The content-length to be set.
*/
set length(len) {
// copy from koa
// change header name to lower case
this.set('content-length', len);
},
get length() {
// copy from koa
const len = this.header['content-length'];
const body = this.body;
if (len == null) {
if (!body) return;
if (typeof body === 'string') return Buffer.byteLength(body);
if (Buffer.isBuffer(body)) return body.length;
if (isJSON(body)) return Buffer.byteLength(JSON.stringify(body));
return;
}
return parseInt(len, 10);
},
/**
* Get or set the content-type.
*
* For Set: If type is null or undefined, this property will be removed.
*
* For Get: If the value is null or undefined, an empty string will be returned;
* if you have multiple values seperated by `;`, ONLY the first one will be returned.
*
* @member {String} Response#type
* @param {String} type The content-type to be set.
*/
set type(type) {
// copy from koa
// Different:
// - change header name to lower case
type = getType(type);
if (type) {
this.set('content-type', type);
} else {
this.remove('content-type');
}
},
get type() {
// copy from koa
const type = this.get('content-type');
if (!type) return '';
return type.split(';')[0];
},
/**
* Get or set a real status code.
*
* e.g.: Using 302 status redirect to the global error page
* instead of show current 500 status page.
* And access log should save 500 not 302,
* then the `realStatus` can help us find out the real status code.
* @member {Number} Response#realStatus
* @return {Number} The status code to be set.
*/
get realStatus() {
if (this[REAL_STATUS]) {
return this[REAL_STATUS];
}
return this.status;
},
/**
* Set a real status code.
*
* e.g.: Using 302 status redirect to the global error page
* instead of show current 500 status page.
* And access log should save 500 not 302,
* then the `realStatus` can help us find out the real status code.
* @member {Number} Response#realStatus
* @param {Number} status The status code to be set.
*/
set realStatus(status) {
this[REAL_STATUS] = status;
},
};