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feat: add csp report endpoint #209

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merged 1 commit into from
Jan 3, 2023
Merged

feat: add csp report endpoint #209

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1 change: 1 addition & 0 deletions packages/edge-gateway/src/bindings.d.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -11,6 +11,7 @@ export interface EnvInput {
LOKI_TOKEN?: string
EDGE_GATEWAY: Fetcher
GATEWAY_HOSTNAME: string
CSP_REPORT_URI: string
GOODBITSLIST: KVNamespace
}

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33 changes: 22 additions & 11 deletions packages/edge-gateway/src/gateway.js
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Expand Up @@ -13,6 +13,11 @@ const IPFS_GATEWAYS = [
'https://ipfs.io/ipfs/',
]
const DOTSTORAGE_APIS = ['https://*.web3.storage', 'https://*.nft.storage']
const ALLOWED_LIST = [
'https://*.githubusercontent.com',
'https://polygon-rpc.com',
'https://rpc.testnet.fantom.network',
]

/**
* Handle gateway requests
Expand Down Expand Up @@ -50,31 +55,37 @@ export async function gatewayGet(request, env) {
return response
}

return getTransformedResponseWithCspHeaders(response)
return getTransformedResponseWithCspHeaders(response, env)
}

/**
* Transforms response with custom headers.
* Content-Security-Policy header specified to only allow requests within same origin.
*
* @param {Response} response
* @param {import('./bindings').Env} env
*/
function getTransformedResponseWithCspHeaders(response) {
function getTransformedResponseWithCspHeaders(response, env) {
const clonedResponse = new Response(response.body, response)
const defaultSrc = `'self' 'unsafe-inline' 'unsafe-eval' blob: data: ${IPFS_GATEWAYS.join(
' '
)} ${DOTSTORAGE_APIS.join(' ')} ${ALLOWED_LIST.join(' ')}`
const connectSrc = `'self' blob: data: ${IPFS_GATEWAYS.join(
' '
)} ${DOTSTORAGE_APIS.join(' ')} ${ALLOWED_LIST.join(' ')}`
const reportUri = env.CSP_REPORT_URI

clonedResponse.headers.set(
'content-security-policy',
`default-src 'self' 'unsafe-inline' 'unsafe-eval' blob: data: ${IPFS_GATEWAYS.join(
' '
)} ${DOTSTORAGE_APIS.join(
' '
)} https://*.githubusercontent.com; form-action 'self'; navigate-to 'self'; connect-src 'self' blob: data: ${IPFS_GATEWAYS.join(
' '
)} ${DOTSTORAGE_APIS.join(
' '
)} https://polygon-rpc.com https://rpc.testnet.fantom.network`
`default-src ${defaultSrc} ; form-action 'self'; navigate-to 'self'; connect-src ${connectSrc} ; report-to csp-endpoint ; report-uri ${reportUri}`
)

reportUri &&
clonedResponse.headers.set(
'reporting-endpoints',
`csp-endpoint="${reportUri}"`
)

return clonedResponse
}

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2 changes: 2 additions & 0 deletions packages/edge-gateway/wrangler.toml
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Expand Up @@ -32,6 +32,7 @@ kv_namespaces = [

[env.production.vars]
GATEWAY_HOSTNAME = 'ipfs.nftstorage.link'
CSP_REPORT_URI = 'https://csp-report-to.web3.storage'
DEBUG = "false"
ENV = "production"

Expand All @@ -58,6 +59,7 @@ kv_namespaces = [

[env.staging.vars]
GATEWAY_HOSTNAME = 'ipfs-staging.nftstorage.link'
CSP_REPORT_URI = 'https://staging.csp-report-to.web3.storage'
DEBUG = "true"
ENV = "staging"

Expand Down