FilesExpand file tree

main

/

request.ts

Copy path

Blame

More file actions

Blame

More file actions

Latest commit

 

History

History

History

213 lines (188 loc) · 5.75 KB

main

/

request.ts

Copy path

Top

File metadata and controls

• Code
• Blame

213 lines (188 loc) · 5.75 KB

Raw

Copy raw file

Download raw file

Open symbols panel

Edit and raw actions

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

166

167

168

169

170

171

172

173

174

175

176

177

178

179

180

181

182

183

184

185

186

187

188

189

190

191

192

193

194

195

196

197

198

199

200

201

202

203

204

205

206

207

208

209

210

211

212

213

/* eslint-disable @typescript-eslint/no-explicit-any */

// Define prototype for lightweight pseudo Request object

import type { IncomingMessage } from 'node:http'

import { Http2ServerRequest } from 'node:http2'

import { Readable } from 'node:stream'

import type { TLSSocket } from 'node:tls'

export class RequestError extends Error {

static name = 'RequestError'

constructor(

message: string,

options?: {

cause?: unknown

}

) {

super(message, options)

}

}

export const toRequestError = (e: unknown): RequestError => {

if (e instanceof RequestError) {

return e

}

return new RequestError((e as Error).message, { cause: e })

}

export const GlobalRequest = global.Request

export class Request extends GlobalRequest {

constructor(input: string | Request, options?: RequestInit) {

if (typeof input === 'object' && getRequestCache in input) {

input = (input as any)[getRequestCache]()

}

// Check if body is ReadableStream like. This makes it compatbile with ReadableStream polyfills.

if (typeof (options?.body as ReadableStream)?.getReader !== 'undefined') {

// node 18 fetch needs half duplex mode when request body is stream

// if already set, do nothing since a Request object was passed to the options or explicitly set by the user.

;(options as any).duplex ??= 'half'

}

super(input, options)

}

}

const newRequestFromIncoming = (

method: string,

url: string,

incoming: IncomingMessage | Http2ServerRequest,

abortController: AbortController

): Request => {

const headerRecord: [string, string][] = []

const rawHeaders = incoming.rawHeaders

for (let i = 0; i < rawHeaders.length; i += 2) {

const { [i]: key, [i + 1]: value } = rawHeaders

if (key.charCodeAt(0) !== /*:*/ 0x3a) {

headerRecord.push([key, value])

}

}

const init = {

method: method,

headers: headerRecord,

signal: abortController.signal,

} as RequestInit

if (method === 'TRACE') {

init.method = 'GET'

const req = new Request(url, init)

Object.defineProperty(req, 'method', {

get() {

return 'TRACE'

},

})

return req

}

if (!(method === 'GET' || method === 'HEAD')) {

if ('rawBody' in incoming && incoming.rawBody instanceof Buffer) {

// In some environments (e.g. firebase functions), the body is already consumed.

// So we need to re-read the request body from `incoming.rawBody` if available.

init.body = new ReadableStream({

start(controller) {

controller.enqueue(incoming.rawBody)

controller.close()

},

})

} else {

// lazy-consume request body

init.body = Readable.toWeb(incoming) as ReadableStream<Uint8Array>

}

}

return new Request(url, init)

}

const getRequestCache = Symbol('getRequestCache')

const requestCache = Symbol('requestCache')

const incomingKey = Symbol('incomingKey')

const urlKey = Symbol('urlKey')

export const abortControllerKey = Symbol('abortControllerKey')

export const getAbortController = Symbol('getAbortController')

const requestPrototype: Record<string | symbol, any> = {

get method() {

return this[incomingKey].method || 'GET'

},

get url() {

return this[urlKey]

},

[getAbortController]() {

this[getRequestCache]()

return this[abortControllerKey]

},

[getRequestCache]() {

this[abortControllerKey] ||= new AbortController()

return (this[requestCache] ||= newRequestFromIncoming(

this.method,

this[urlKey],

this[incomingKey],

this[abortControllerKey]

))

},

}

;[

'body',

'bodyUsed',

'cache',

'credentials',

'destination',

'headers',

'integrity',

'mode',

'redirect',

'referrer',

'referrerPolicy',

'signal',

'keepalive',

].forEach((k) => {

Object.defineProperty(requestPrototype, k, {

get() {

return this[getRequestCache]()[k]

},

})

})

;['arrayBuffer', 'blob', 'clone', 'formData', 'json', 'text'].forEach((k) => {

Object.defineProperty(requestPrototype, k, {

value: function () {

return this[getRequestCache]()[k]()

},

})

})

Object.setPrototypeOf(requestPrototype, Request.prototype)

export const newRequest = (

incoming: IncomingMessage | Http2ServerRequest,

defaultHostname?: string

) => {

const req = Object.create(requestPrototype)

req[incomingKey] = incoming

const incomingUrl = incoming.url || ''

// handle absolute URL in request.url

if (

incomingUrl[0] !== '/' && // short-circuit for performance. most requests are relative URL.

(incomingUrl.startsWith('http://') || incomingUrl.startsWith('https://'))

) {

if (incoming instanceof Http2ServerRequest) {

throw new RequestError('Absolute URL for :path is not allowed in HTTP/2') // RFC 9113 8.3.1.

}

try {

const url = new URL(incomingUrl)

req[urlKey] = url.href

} catch (e) {

throw new RequestError('Invalid absolute URL', { cause: e })

}

return req

}

// Otherwise, relative URL

const host =

(incoming instanceof Http2ServerRequest ? incoming.authority : incoming.headers.host) ||

defaultHostname

if (!host) {

throw new RequestError('Missing host header')

}

let scheme: string

if (incoming instanceof Http2ServerRequest) {

scheme = incoming.scheme

if (!(scheme === 'http' || scheme === 'https')) {

throw new RequestError('Unsupported scheme')

}

} else {

scheme = incoming.socket && (incoming.socket as TLSSocket).encrypted ? 'https' : 'http'

}

const url = new URL(`${scheme}://${host}${incomingUrl}`)

// check by length for performance.

// if suspicious, check by host. host header sometimes contains port.

if (url.hostname.length !== host.length && url.hostname !== host.replace(/:\d+$/, '')) {

throw new RequestError('Invalid host header')

}

req[urlKey] = url.href

return req

}