google-cloud-functions-system-packages's Introduction

Examples of using system and custom programs in Google Cloud Functions

List of cloud functions to demonstrate possibilities to use Unix and compiled programs in Cloud Functions:

cf_ascii - using figlet http://www.figlet.org/ compiled C program which converts text to ASCII text. Input request with parameter contains text which should be converted to ASCII
cf_pdf2png - using provided ghostscript program to convert PDF file to PNG images (1 page -> 1 image)
cf_system - executing various system commands to explore system within Cloud Functions, like displaying all binaries, executing commands.

More information can be found in this article Using system packages and custom binaries in Google Cloud Functions.

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google-cloud-functions-system-packages's Issues

Permission denied in subprocess

Thanks for a great article and examples!

I have cloned the repo and deployed cf_ascii to GCF, but I get an error when calling the function:

Traceback (most recent call last):
File "/env/local/lib/python3.7/site-packages/google/cloud/functions/worker.py", line 346, in run_http_function
result = _function_handler.invoke_user_function(flask.request)
File "/env/local/lib/python3.7/site-packages/google/cloud/functions/worker.py", line 217, in invoke_user_function
return call_user_function(request_or_event)
File "/env/local/lib/python3.7/site-packages/google/cloud/functions/worker.py", line 210, in call_user_function
return self._user_function(request_or_event)
File "/user_code/main.py", line 15, in main
p = subprocess.Popen(cmd, stderr=subprocess.PIPE, stdout=subprocess.PIPE)
File "/opt/python3.7/lib/python3.7/subprocess.py", line 775, in init
restore_signals, start_new_session)
File "/opt/python3.7/lib/python3.7/subprocess.py", line 1522, in _execute_child
raise child_exception_type(errno_num, err_msg, err_filename)
PermissionError: [Errno 13] Permission denied: './figlet'