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
|
import { fetchCache } from './fetch-cache'
import { getRequestCacheKey } from './get-request-cache-key'
import { handleOptions } from './handle-options'
import { fetchRequest } from './fetch-request'
import { resolveRequest } from './resolve-request'
import { globalResHeaders } from './global-res-headers'
addEventListener('fetch', (event) => {
event.respondWith(handleFetchEvent(event))
})
/**
* @param {*} event
*/
async function handleFetchEvent(event) {
const gatewayStartTime = Date.now()
let gatewayTimespan
let res
function recordTimespans() {
const now = Date.now()
gatewayTimespan = now - gatewayStartTime
}
try {
const { request } = event
const { method } = request
if (method === 'OPTIONS') {
return handleOptions(request)
}
const { originReq } = await resolveRequest(event, request)
try {
const cacheKey = await getRequestCacheKey(originReq)
const originRes = await fetchCache({
event,
cacheKey,
fetch: () => fetchRequest(event, { originReq })
})
res = new Response(originRes.body, originRes)
recordTimespans()
res.headers.set('x-proxy-response-time', `${gatewayTimespan}ms`)
return res
} catch (err) {
console.error(err)
recordTimespans()
res = new Response(
JSON.stringify({
error: err.message,
type: err.type,
code: err.code
}),
{ status: 500, headers: globalResHeaders }
)
return res
}
} catch (err) {
console.error(err)
if (err.response) {
// TODO: make sure this response also has CORS globalResHeaders
return err.response
} else {
return new Response(
JSON.stringify({
error: err.message,
type: err.type,
code: err.code
}),
{
status: 500,
headers: globalResHeaders
}
)
}
}
}
|