aboutsummaryrefslogtreecommitdiffhomepage
path: root/server/helpers/requests.ts
blob: fc77ebd357f5f1d8d8f57f2a42f90a810a56dc55 (plain) (blame)
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
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
import { createWriteStream, remove } from 'fs-extra'
import got, { CancelableRequest, NormalizedOptions, Options as GotOptions, RequestError, Response } from 'got'
import { HttpProxyAgent, HttpsProxyAgent } from 'hpagent'
import { join } from 'path'
import { CONFIG } from '../initializers/config'
import { ACTIVITY_PUB, BINARY_CONTENT_TYPES, PEERTUBE_VERSION, REQUEST_TIMEOUT, WEBSERVER } from '../initializers/constants'
import { pipelinePromise } from './core-utils'
import { processImage } from './image-utils'
import { logger, loggerTagsFactory } from './logger'
import { getProxy, isProxyEnabled } from './proxy'

const lTags = loggerTagsFactory('request')

const httpSignature = require('@peertube/http-signature')

export interface PeerTubeRequestError extends Error {
  statusCode?: number
  responseBody?: any
  responseHeaders?: any
}

type PeerTubeRequestOptions = {
  activityPub?: boolean
  bodyKBLimit?: number // 1MB
  httpSignature?: {
    algorithm: string
    authorizationHeaderName: string
    keyId: string
    key: string
    headers: string[]
  }
  jsonResponse?: boolean
} & Pick<GotOptions, 'headers' | 'json' | 'method' | 'searchParams'>

const peertubeGot = got.extend({
  ...getAgent(),

  headers: {
    'user-agent': getUserAgent()
  },

  handlers: [
    (options, next) => {
      const promiseOrStream = next(options) as CancelableRequest<any>
      const bodyKBLimit = options.context?.bodyKBLimit as number
      if (!bodyKBLimit) throw new Error('No KB limit for this request')

      const bodyLimit = bodyKBLimit * 1000

      /* eslint-disable @typescript-eslint/no-floating-promises */
      promiseOrStream.on('downloadProgress', progress => {
        if (progress.transferred > bodyLimit && progress.percent !== 1) {
          const message = `Exceeded the download limit of ${bodyLimit} B`
          logger.warn(message, lTags())

          // CancelableRequest
          if (promiseOrStream.cancel) {
            promiseOrStream.cancel()
            return
          }

          // Stream
          (promiseOrStream as any).destroy()
        }
      })

      return promiseOrStream
    }
  ],

  hooks: {
    beforeRequest: [
      options => {
        const headers = options.headers || {}
        headers['host'] = options.url.host
      },

      options => {
        const httpSignatureOptions = options.context?.httpSignature

        if (httpSignatureOptions) {
          const method = options.method ?? 'GET'
          const path = options.path ?? options.url.pathname

          if (!method || !path) {
            throw new Error(`Cannot sign request without method (${method}) or path (${path}) ${options}`)
          }

          httpSignature.signRequest({
            getHeader: function (header) {
              return options.headers[header]
            },

            setHeader: function (header, value) {
              options.headers[header] = value
            },

            method,
            path
          }, httpSignatureOptions)
        }
      }
    ],

    beforeRetry: [
      (_options: NormalizedOptions, error: RequestError, retryCount: number) => {
        logger.debug('Retrying request to %s.', error.request.requestUrl, { retryCount, error: buildRequestError(error), ...lTags() })
      }
    ]
  }
})

function doRequest (url: string, options: PeerTubeRequestOptions = {}) {
  const gotOptions = buildGotOptions(options)

  return peertubeGot(url, gotOptions)
    .catch(err => { throw buildRequestError(err) })
}

function doJSONRequest <T> (url: string, options: PeerTubeRequestOptions = {}) {
  const gotOptions = buildGotOptions(options)

  return peertubeGot<T>(url, { ...gotOptions, responseType: 'json' })
    .catch(err => { throw buildRequestError(err) })
}

async function doRequestAndSaveToFile (
  url: string,
  destPath: string,
  options: PeerTubeRequestOptions = {}
) {
  const gotOptions = buildGotOptions(options)

  const outFile = createWriteStream(destPath)

  try {
    await pipelinePromise(
      peertubeGot.stream(url, gotOptions),
      outFile
    )
  } catch (err) {
    remove(destPath)
      .catch(err => logger.error('Cannot remove %s after request failure.', destPath, { err, ...lTags() }))

    throw buildRequestError(err)
  }
}

async function downloadImage (url: string, destDir: string, destName: string, size: { width: number, height: number }) {
  const tmpPath = join(CONFIG.STORAGE.TMP_DIR, 'pending-' + destName)
  await doRequestAndSaveToFile(url, tmpPath)

  const destPath = join(destDir, destName)

  try {
    await processImage(tmpPath, destPath, size)
  } catch (err) {
    await remove(tmpPath)

    throw err
  }
}

function getAgent () {
  if (!isProxyEnabled()) return {}

  const proxy = getProxy()

  logger.info('Using proxy %s.', proxy, lTags())

  const proxyAgentOptions = {
    keepAlive: true,
    keepAliveMsecs: 1000,
    maxSockets: 256,
    maxFreeSockets: 256,
    scheduling: 'lifo' as 'lifo',
    proxy
  }

  return {
    agent: {
      http: new HttpProxyAgent(proxyAgentOptions),
      https: new HttpsProxyAgent(proxyAgentOptions)
    }
  }
}

function getUserAgent () {
  return `PeerTube/${PEERTUBE_VERSION} (+${WEBSERVER.URL})`
}

function isBinaryResponse (result: Response<any>) {
  return BINARY_CONTENT_TYPES.has(result.headers['content-type'])
}

async function findLatestRedirection (url: string, options: PeerTubeRequestOptions, iteration = 1) {
  if (iteration > 10) throw new Error('Too much iterations to find final URL ' + url)

  const { headers } = await peertubeGot(url, { followRedirect: false, ...buildGotOptions(options) })

  if (headers.location) return findLatestRedirection(headers.location, options, iteration + 1)

  return url
}

// ---------------------------------------------------------------------------

export {
  doRequest,
  doJSONRequest,
  doRequestAndSaveToFile,
  isBinaryResponse,
  downloadImage,
  findLatestRedirection,
  peertubeGot
}

// ---------------------------------------------------------------------------

function buildGotOptions (options: PeerTubeRequestOptions) {
  const { activityPub, bodyKBLimit = 1000 } = options

  const context = { bodyKBLimit, httpSignature: options.httpSignature }

  let headers = options.headers || {}

  if (!headers.date) {
    headers = { ...headers, date: new Date().toUTCString() }
  }

  if (activityPub && !headers.accept) {
    headers = { ...headers, accept: ACTIVITY_PUB.ACCEPT_HEADER }
  }

  return {
    method: options.method,
    dnsCache: true,
    timeout: REQUEST_TIMEOUT,
    json: options.json,
    searchParams: options.searchParams,
    retry: 2,
    headers,
    context
  }
}

function buildRequestError (error: RequestError) {
  const newError: PeerTubeRequestError = new Error(error.message)
  newError.name = error.name
  newError.stack = error.stack

  if (error.response) {
    newError.responseBody = error.response.body
    newError.responseHeaders = error.response.headers
    newError.statusCode = error.response.statusCode
  }

  return newError
}