Created
February 21, 2021 03:30
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b2AuthorizeCfWorker.py
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import requests | |
import base64 | |
import json | |
flagDebug = True | |
bucketSourceId = '<BucketID>' | |
bucketFilenamePrefix = '' | |
# for b64 encoding. | |
b2AppKey = b'<AppKey>' | |
b2AppKeyId = b'<(App)KeyID>' | |
# Cloudflare settings | |
cfAccountId = '<AccoundID>' # Your Cloudflare Account ID, can be found on domain overview site on the right sidebar | |
cfWorkerApi = '<API-Token>' # The API token to modify the below worker | |
cfWorkerName = '<WorkerName>' # worker script name | |
# An authorization token is valid for not more than 1 week | |
# This sets it to the maximum time value | |
maxSecondsAuthValid = 7*24*60*60 # one week in seconds | |
# DO NOT CHANGE ANYTHING BELOW THIS LINE ### | |
baseAuthorizationUrl = 'https://api.backblazeb2.com/b2api/v2/b2_authorize_account' | |
b2GetDownloadAuthApi = '/b2api/v2/b2_get_download_authorization' | |
# Get fundamental authorization code | |
idAndKey = b2AppKeyId + b':' + b2AppKey | |
b2AuthKeyAndId = base64.b64encode(idAndKey) | |
basicAuthString = 'Basic ' + b2AuthKeyAndId.decode('UTF-8') | |
authorizationHeaders = {'Authorization' : basicAuthString} | |
resp = requests.get(baseAuthorizationUrl, headers=authorizationHeaders) | |
if flagDebug: | |
print (resp.status_code) | |
print (resp.headers) | |
print (resp.content) | |
respData = json.loads(resp.content.decode("UTF-8")) | |
bAuToken = respData["authorizationToken"] | |
bFileDownloadUrl = respData["downloadUrl"] | |
bPartSize = respData["recommendedPartSize"] | |
bApiUrl = respData["apiUrl"] | |
# Get specific download authorization | |
getDownloadAuthorizationUrl = bApiUrl + b2GetDownloadAuthApi | |
downloadAuthorizationHeaders = { 'Authorization' : bAuToken} | |
resp2 = requests.post(getDownloadAuthorizationUrl, | |
json = {'bucketId' : bucketSourceId, | |
'fileNamePrefix' : "", | |
'validDurationInSeconds' : maxSecondsAuthValid }, | |
headers=downloadAuthorizationHeaders ) | |
resp2Content = resp2.content.decode("UTF-8") | |
resp2Data = json.loads(resp2Content) | |
bDownAuToken = resp2Data["authorizationToken"] | |
if flagDebug: | |
print("authorizationToken: " + bDownAuToken) | |
print("downloadUrl: " + bFileDownloadUrl) | |
print("recommendedPartSize: " + str(bPartSize)) | |
print("apiUrl: " + bApiUrl) | |
workerTemplate = """addEventListener('fetch', event => { | |
event.respondWith(handleRequest(event.request)) | |
}) | |
async function handleRequest(request) { | |
let authToken='<B2_DOWNLOAD_TOKEN>' | |
let b2Headers = new Headers(request.headers) | |
b2Headers.append("Authorization", authToken) | |
modRequest = new Request(request.url, { | |
method: request.method, | |
headers: b2Headers | |
}) | |
const response = await fetch(modRequest) | |
return response | |
}""" | |
workerCode = workerTemplate.replace('<B2_DOWNLOAD_TOKEN>', bDownAuToken) | |
cfHeaders = { 'Authorization' : "Bearer " + cfWorkerApi, | |
'Content-Type' : 'application/javascript' } | |
cfUrl = 'https://api.cloudflare.com/client/v4/accounts/' + cfAccountId + "/workers/scripts/" + cfWorkerName | |
resp = requests.put(cfUrl, headers=cfHeaders, data=workerCode) | |
if flagDebug: | |
print(resp) | |
print(resp.headers) | |
print(resp.content) |
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