Example 3: Creating a Function by Uploading Code to an OBS Bucket

Scenario

Prerequisites

General Procedure

1. Write code locally to create a function project.
2. Compress the code file into a ZIP package, upload the package to the OBS bucket, and record the link of this bucket.
3. Call the function creation API to create a function (see Creating a Function) using the OBS link.

Step 1: Create a Function Project

1. Write code for printing text helloworld.

   Open the text editor, compile a HelloWorld function, and save the code file as helloworld.py. The code is as follows:

   def printhello(): 
       print 'Hello world!' 
   
   

2. Define a FunctionGraph function.

   Open the text editor, define a function, and save the function file as index.py under the same directory as the helloworld.py file. The function code is as follows:

   import json 
   import helloworld 
    
   def handler (event, context): 
       output =json.dumps(event) 
       helloworld.printhello() 
       return output
   
   

Step 2: Upload the Project to an OBS Bucket

1. In the function project, select the helloworld.py and index.py files and compress them into fss_examples_python2.7.zip.
2. Upload the fss_examples_python2.7.zip package to the OBS bucket and record the OBS link.

Step 3: Call the Function Creation API to Create a Function Using the OBS Link

• Example request

  POST  https://{Endpoint}/v2/{project_id}/fgs/functions
  {
   "code_type": "obs",
   "code_url": "https://test.obs.xxx.xxx.com/fss_examples_python2.7.zip",
   "func_name": "create_function_from_obs",
   "handler": "index.handler",
   "memory_size": 256,
   "package": "default",
   "runtime": "Python2.7",
   "timeout": 30
  }
  
  

  code_url indicates the OBS link recorded in 2.

• Example response

  {
   "func_urn": "urn:fss:{project_name}:{project_id}:function:default:create_function_from_obs:latest",
   "func_name": "create_function_from_obs",
   "domain_id": "0503xxxa960",
   "namespace": "{project_id}",
   "project_name": "xxx",
   "package": "default",
   "runtime": "Python2.7",
   "timeout": 30,
   "handler": "index.handler",
   "memory_size": 256,
   "cpu": 400,
   "code_type": "obs",
   "code_url": "https://test.obs.xxx.xxx.com/fss_examples_python2.7.zip",
   "code_filename": "fss_examples_python2.7.zip",
   "code_size": 436,
   "digest": "3af770ada27514564b1a20d964cba4b35f432fa40f9fc4f4f7c1f0d2f42eac6cb4db1358c195235966b05f66b4664e7bf31c3f384a9066b3d1fcc3e96b4c3f65",
   "version": "latest",
   "image_name": "latest-200619100734@gjf4p",
   "last_modified": "2020-06-19T10:07:34+08:00",
   "strategy_config": {
    "concurrency": -1
   },
   "StrategyConfig": {},
   "enterprise_project_id": "0"
  }