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(Chilkat2-Python) Download Object from Google Cloud StorageDemonstrates how to download an object from Google Cloud Storage to a file.
import sys import chilkat2 # This example requires the Chilkat API to have been previously unlocked. # See Global Unlock Sample for sample code. # This example uses a previously obtained access token having permission for the # scope "https://www.googleapis.com/auth/cloud-platform" # In this example, Get Google Cloud Storage OAuth2 Access Token, # the service account access token was saved to a text file. This example fetches the access token from the file.. sbToken = chilkat2.StringBuilder() sbToken.LoadFile("qa_data/tokens/googleCloudStorageAccessToken.txt","utf-8") # Send a GET equivalent to this curl command. # curl -X GET \ # -H "Authorization: Bearer [OAUTH2_TOKEN]" \ # -o "[SAVE_TO_LOCATION]" \ # "https://www.googleapis.com/storage/v1/b/[BUCKET_NAME]/o/[OBJECT_NAME]?alt=media" http = chilkat2.Http() http.AuthToken = sbToken.GetAsString() # Construct a URL to download an object named "starfish.jpg" from the "chilkat-ocean" bucket. http.SetUrlVar("bucket_name","chilkat-ocean") http.SetUrlVar("object_name","starfish.jpg") url = "https://www.googleapis.com/storage/v1/b/{$bucket_name}/o/{$object_name}?alt=media" # If there is an error response, then we didn't actually download the file data, # but instead we downloaded an error response.. fileData = chilkat2.BinData() success = http.DownloadBd(url,fileData) if (success == False): print(http.LastErrorText) sys.exit() sbErrorResponse = chilkat2.StringBuilder() responseCode = http.LastStatus if (responseCode == 401): print("If invalid credentials, then it is likely the access token expired.") print("Your app should automatically fetch a new access token and re-try.") if (responseCode != 200): # Get the error response sbErrorResponse.AppendBd(fileData,"utf-8",0,0) print("Error response code = " + str(responseCode)) print("Error:") print(sbErrorResponse.GetAsString()) sys.exit() print("Success.") # Save the downloaded data to a file. success = fileData.WriteFile("qa_output/starfish.jpg") |
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