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import type { TestInfo } from '@playwright/test'
import type { FetchHandler } from './next-worker-fixture'
import { step } from './step'
async function parseBody(
r: Pick<Request, 'headers' | 'json' | 'text' | 'arrayBuffer' | 'formData'>
): Promise<Record<string, string>> {
const contentType = r.headers.get('content-type')
let error: string | undefined
let text: string | undefined
let json: unknown
let formData: FormData | undefined
let buffer: ArrayBuffer | undefined
if (contentType?.includes('text')) {
try {
text = await r.text()
} catch (e) {
error = 'failed to parse text'
}
} else if (contentType?.includes('json')) {
try {
json = await r.json()
} catch (e) {
error = 'failed to parse json'
}
} else if (contentType?.includes('form-data')) {
try {
formData = await r.formData()
} catch (e) {
error = 'failed to parse formData'
}
} else {
try {
buffer = await r.arrayBuffer()
} catch (e) {
error = 'failed to parse arrayBuffer'
}
}
return {
...(error ? { error } : null),
...(text ? { text } : null),
...(json ? { json: JSON.stringify(json) } : null),
...(formData ? { formData: JSON.stringify(Array.from(formData)) } : null),
...(buffer && buffer.byteLength > 0
? { buffer: `base64;${Buffer.from(buffer).toString('base64')}` }
: null),
}
}
function parseHeaders(headers: Headers): Record<string, string> {
return Object.fromEntries(
Array.from(headers)
.sort(([key1], [key2]) => key1.localeCompare(key2))
.map(([key, value]) => {
return [`header.${key}`, value]
})
)
}
export async function reportFetch(
testInfo: TestInfo,
req: Request,
handler: FetchHandler
): Promise<Awaited<ReturnType<FetchHandler>>> {
return step(
testInfo,
{
title: `next.onFetch: ${req.method} ${req.url}`,
category: 'next.onFetch',
apiName: 'next.onFetch',
params: {
method: req.method,
url: req.url,
...(await parseBody(req.clone())),
...parseHeaders(req.headers),
},
},
async (complete) => {
const res = await handler(req)
if (res === undefined || res == null) {
complete({ error: { message: 'unhandled' } })
} else if (typeof res === 'string' && res !== 'continue') {
complete({ error: { message: res } })
} else {
let body: Record<string, unknown>
if (typeof res === 'string') {
body = { response: res }
} else {
const { status, statusText } = res
body = {
status,
...(statusText ? { statusText } : null),
...(await parseBody(res.clone())),
...parseHeaders(res.headers),
}
}
await step(
testInfo,
{
title: `next.onFetch.fulfilled: ${req.method} ${req.url}`,
category: 'next.onFetch',
apiName: 'next.onFetch.fulfilled',
params: {
...body,
'request.url': req.url,
'request.method': req.method,
},
},
async () => undefined
).catch(() => undefined)
}
return res
}
)
}
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