/
context.ts
131 lines (110 loc) · 3.58 KB
/
context.ts
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import type { NotFoundHandler } from './hono.ts'
import type { StatusCode } from './utils/http-status.ts'
import { isAbsoluteURL } from './utils/url.ts'
type Headers = Record<string, string>
export type Data = string | ArrayBuffer | ReadableStream
export type Env = Record<string, any>
export class Context<RequestParamKeyType extends string = string, E = Env> {
req: Request<RequestParamKeyType>
env: E
event: FetchEvent | undefined
executionCtx: ExecutionContext | undefined
finalized: boolean
private _status: StatusCode = 200
private _pretty: boolean = false
private _prettySpace: number = 2
private _map: Record<string, any> | undefined
private _headers: Record<string, string> | undefined
private _res: Response | undefined
private notFoundHandler: NotFoundHandler
constructor(
req: Request,
env: E | undefined = undefined,
eventOrExecutionCtx: FetchEvent | ExecutionContext | undefined = undefined,
notFoundHandler: NotFoundHandler = () => new Response()
) {
this.req = req
this.env = env ? env : ({} as E)
if (eventOrExecutionCtx && 'respondWith' in eventOrExecutionCtx) {
this.event = eventOrExecutionCtx
} else {
this.executionCtx = eventOrExecutionCtx
}
this.notFoundHandler = notFoundHandler
this.finalized = false
}
get res(): Response {
return (this._res ||= new Response())
}
set res(_res: Response) {
this._res = _res
this.finalized = true
}
header(name: string, value: string): void {
this._headers ||= {}
this._headers[name] = value
if (this.finalized) {
this.res.headers.set(name, value)
}
}
status(status: StatusCode): void {
this._status = status
}
set(key: string, value: any): void {
this._map ||= {}
this._map[key] = value
}
get(key: string) {
if (!this._map) {
return undefined
}
return this._map[key]
}
pretty(prettyJSON: boolean, space: number = 2): void {
this._pretty = prettyJSON
this._prettySpace = space
}
newResponse(data: Data | null, status: StatusCode, headers: Headers = {}): Response {
const _headers = { ...this._headers, ...headers }
if (this._res) {
this._res.headers.forEach((v, k) => {
_headers[k] = v
})
}
return new Response(data, {
status: status || this._status || 200,
headers: _headers,
})
}
body(data: Data | null, status: StatusCode = this._status, headers: Headers = {}): Response {
return this.newResponse(data, status, headers)
}
text(text: string, status: StatusCode = this._status, headers: Headers = {}): Response {
headers['Content-Type'] ||= 'text/plain; charset=UTF-8'
return this.body(text, status, headers)
}
json<T>(object: T, status: StatusCode = this._status, headers: Headers = {}): Response {
const body = this._pretty
? JSON.stringify(object, null, this._prettySpace)
: JSON.stringify(object)
headers['Content-Type'] ||= 'application/json; charset=UTF-8'
return this.body(body, status, headers)
}
html(html: string, status: StatusCode = this._status, headers: Headers = {}): Response {
headers['Content-Type'] ||= 'text/html; charset=UTF-8'
return this.body(html, status, headers)
}
redirect(location: string, status: StatusCode = 302): Response {
if (!isAbsoluteURL(location)) {
const url = new URL(this.req.url)
url.pathname = location
location = url.toString()
}
return this.newResponse(null, status, {
Location: location,
})
}
notFound(): Response | Promise<Response> {
return this.notFoundHandler(this as any)
}
}