File size: 3,851 Bytes
1e92f2d
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
import type { IncomingMessage, ServerResponse } from 'http'
import type { PagesAPIRouteDefinition } from '../../route-definitions/pages-api-route-definition'
import type { PageConfig } from '../../../types'
import type { ParsedUrlQuery } from 'querystring'
import { wrapApiHandler, type __ApiPreviewProps } from '../../api-utils'
import type { RouteModuleOptions } from '../route-module'

import { RouteModule, type RouteModuleHandleContext } from '../route-module'
import { apiResolver } from '../../api-utils/node/api-resolver'
import type { RevalidateFn } from '../../lib/router-utils/router-server-context'

type PagesAPIHandleFn = (
  req: IncomingMessage,
  res: ServerResponse
) => Promise<void>

/**
 * The PagesAPIModule is the type of the module exported by the bundled Pages
 * API module.
 */
export type PagesAPIModule = typeof import('../../../build/templates/pages-api')

type PagesAPIUserlandModule = {
  /**
   * The exported handler method.
   */
  readonly default: PagesAPIHandleFn

  /**
   * The exported page config.
   */
  readonly config?: PageConfig
}

type PagesAPIRouteHandlerContext = RouteModuleHandleContext & {
  /**
   * The incoming server request in non-edge runtime.
   */
  req?: IncomingMessage

  /**
   * The outgoing server response in non-edge runtime.
   */
  res?: ServerResponse

  /**
   * The hostname for the request.
   */
  hostname?: string

  /**
   * Keys allowed in the revalidate call.
   */
  allowedRevalidateHeaderKeys?: string[]

  /**
   * Whether to trust the host header.
   */
  trustHostHeader?: boolean

  /**
   * The query for the request.
   */
  query: ParsedUrlQuery

  /**
   * The preview props used by the `preview` API.
   */
  previewProps: __ApiPreviewProps

  /**
   * True if the server is in development mode.
   */
  dev: boolean

  /**
   * Whether errors should be left uncaught to handle
   * higher up
   */
  propagateError: boolean

  /**
   * The page that's being rendered.
   */
  page: string

  /**
   * The error handler for the request.
   */
  onError?: Parameters<typeof apiResolver>[8]

  /**
   * whether multi-zone flag is enabled for draft mode
   */
  multiZoneDraftMode?: boolean

  /**
   * Internal revalidate function to avoid revalidating
   * over the network
   */
  internalRevalidate?: RevalidateFn
}

export type PagesAPIRouteModuleOptions = RouteModuleOptions<
  PagesAPIRouteDefinition,
  PagesAPIUserlandModule
>

export class PagesAPIRouteModule extends RouteModule<
  PagesAPIRouteDefinition,
  PagesAPIUserlandModule
> {
  private apiResolverWrapped: typeof apiResolver

  constructor(options: PagesAPIRouteModuleOptions) {
    super(options)

    if (typeof options.userland.default !== 'function') {
      throw new Error(
        `Page ${options.definition.page} does not export a default function.`
      )
    }

    this.apiResolverWrapped = wrapApiHandler(
      options.definition.page,
      apiResolver
    )
  }

  /**
   *
   * @param req the incoming server request
   * @param res the outgoing server response
   * @param context the context for the render
   */
  public async render(
    req: IncomingMessage,
    res: ServerResponse,
    context: PagesAPIRouteHandlerContext
  ): Promise<void> {
    const { apiResolverWrapped } = this
    await apiResolverWrapped(
      req,
      res,
      context.query,
      this.userland,
      {
        ...context.previewProps,
        trustHostHeader: context.trustHostHeader,
        allowedRevalidateHeaderKeys: context.allowedRevalidateHeaderKeys,
        hostname: context.hostname,
        multiZoneDraftMode: context.multiZoneDraftMode,
        dev: context.dev,
        internalRevalidate: context.internalRevalidate,
      },
      context.propagateError,
      context.dev,
      context.page,
      context.onError
    )
  }
}

export default PagesAPIRouteModule