7 examples of 'express set header' in JavaScript

5
async use(context: any, next: (err?: any) => any): Promise {
6
  context.set('Access-Control-Allow-Methods', 'GET,HEAD,PUT,POST,DELETE,PATCH')
7
  context.set('Access-Control-Allow-Origin', context.request.header.origin || context.request.origin)
8
  context.set('Access-Control-Allow-Headers', ['content-type'])
9
  context.set('Access-Control-Allow-Credentials', 'true')
10
  context.set('Content-Type', 'application/json; charset=utf-8')
11
  return next()
12
}

38
public getHeader(field: string): string | undefined {
39
  return this.req.header(field);
40
}

68
header(header) {
69
    if (!arguments.length) return this._header;
70
    this._header = header;
71
    return this;
72
}

443
function setHeader(res, field, value) {
444
    if (!res.getHeader(field))
445
        res.setHeader(field, value)
446
}

147
function setHeader(res: express.Response, key: string, value: string) {
148
    try {
149
        let existingHeaders = res.getHeaders();
150
        let existingValue = existingHeaders[key.toLowerCase()];
151
        if (existingValue === undefined) {
152
            res.header(key, value);
153
        } else {
154
            res.header(key, existingValue + ", " + value);
155
        }
156
    } catch (err) {
157
        throw generateError(AuthError.GENERAL_ERROR, err);
158
    }
159
}

133
setHeader(name, val) {
134
  this._handle._headers.set(name, val);
135
}

85
function setHeader(req, res, next) {
86
	res.writeHead(200, {'age': '42'});
87
	return next();
88
}