Aliyun FunctionCompute Python SDK

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Overview

The SDK of this version is dependent on the third-party HTTP library requests <https://github.com/kennethreitz/requests>_.

Running environment

Python 2.7, Python 3.6

Notice

fc and fc2 are not compatible, now master repo is fc2, if you still use fc, 1.x branch is what you need. We suggest using fc2, The main difference between fc and fc2 is:

1, all http request fuction can set headers

.. code-block:: python

def invoke_function(self, serviceName, functionName, payload=None, 
        headers = {'x-fc-invocation-type': 'Sync', 'x-fc-log-type' : 'None'}):                                           
    ...

Attention: abandon async_invoke_function, there is only one function interface invoke_function, distinguish between synchronous and asynchronous by x-fc-invocation-type parameters(Sync or Async).

.. code-block:: python

# sync invoke
client.invoke_function('service_name', 'function_name')

# async invoke
client.invoke_function('service_name', 'function_name', headers = {'x-fc-invocation-type': 'Async'})

2, The all http response returned by the user is the following object

.. code-block:: python

class FcHttpResponse(object):
    def __init__(self, headers, data):
        self._headers = headers
        self._data = data

    @property
    def headers(self):
        return self._headers

    @property
    def data(self):
        return self._data

Note: for invoke function, data is bytes, for other apis, data is dict

Installation

Install the official release version through PIP (taking Linux as an example):

.. code-block:: bash

$ pip install aliyun-fc2

You can also install the unzipped installer package directly:

.. code-block:: bash

$ sudo python setup.py install

if you still use fc, you can install the official fc1 release version through PIP (taking Linux as an example):

.. code-block:: bash

$ pip install aliyun-fc

Getting started

.. code-block:: python

# -*- coding: utf-8 -*-

import fc2


# To know the endpoint and access key id/secret info, please refer to:
# https://help.aliyun.com/document_detail/52984.html
client = fc2.Client(
    endpoint='<Your Endpoint>',
    accessKeyID='<Your AccessKeyID>',
    accessKeySecret='<Your AccessKeySecret>')

# Create service.
client.create_service('service_name')

# set vpc config when creating the service
vpcConfig = {
        'vpcId': '<Your Vpc Id>',
        'vSwitchIds': '<[Your VSwitch Ids]>',
        'securityGroupId': '<Your Security Group Id>'
}

# create vpcConfig when creating the service
# you have to set the role if you want to set vpc config
vpc_role = 'acs🐏:12345678:role/aliyunvpcrole'

# set nas config when creating the service
nasConfig = {
       "userId": '<The NAS file system user id>',
       "groupId": '<The NAS file system group id>',
       "mountPoints": [
            {
                "serverAddrserverAddr" : '<The NAS file system mount target>',
                "mountDir" : '<The mount dir to the local file system>',
            }
       ],
}

service = client.create_service(name, role=vpc_role, vpcConfig=vpcConfig, nasConfig=nasConfig)

# Create function.
# the current directory has a main.zip file (main.py which has a function of myhandler)
# set environment variables {'testKey': 'testValue'}
client.create_function('service_name', 'function_name', 'python3',  'main.my_handler', codeZipFile = 'main.zip', environmentVariables = {'testKey': 'testValue'})

# Create function with initailizer
# main.my_initializer is the entry point of initializer interface
client.create_function('service_name', 'function_name', 'python3',  'main.my_handler', "main.my_initializer", codeZipFile = 'main.zip', environmentVariables = {'testKey': 'testValue'})

# Invoke function synchronously.
client.invoke_function('service_name', 'function_name')

# Create trigger
# Create oss trigger
oss_trigger_config = {
        'events': ['oss:ObjectCreated:*'],
        'filter': {
            'key': {
                'prefix': 'prefix',
                'suffix': 'suffix'
            }
        }
}
source_arn = 'acs:oss:cn-shanghai:12345678:bucketName'
invocation_role = 'acs🐏:12345678:role/aliyunosseventnotificationrole'
client.create_trigger('service_name', 'function_name', 'trigger_name', 'oss',
                                                     oss_trigger_config, source_arn, invocation_role)

# Create log trigger
log_trigger_config = {
        'sourceConfig': {
            'logstore': 'log_store_source'
        },
        'jobConfig': {
            'triggerInterval': 60,
            'maxRetryTime': 10
        },
        'functionParameter': {},
        'logConfig': {
            'project': 'log_project',
            'logstore': 'log_store'
        },
        'enable': False
}
source_arn = 'acs:log:cn-shanghai:12345678:project/log_project'
invocation_role = 'acs🐏:12345678:role/aliyunlogetlrole'
client.create_trigger('service_name', 'function_name', 'trigger_name', 'oss',
                                                     log_trigger_config, source_arn, invocation_role)
# Create time trigger
time_trigger_config = {
        'payload': 'awesome-fc'
        'cronExpression': '0 5 * * * *'
        'enable': true
}
client.create_trigger('service_name', 'function_name', 'trigger_name', 'timer', time_trigger_config, '', '')

# Invoke a function with a input parameter.
client.invoke_function('service_name', 'function_name', payload=bytes('hello_world'))

# Read a image and invoke a function with the file data as input parameter.
src = open('src_image_file_path', 'rb') # Note: please open it as binary.
r = client.invoke_function('service_name', 'function_name', payload=src)
# save the result as the output image.
dst = open('dst_image_file_path', 'wb')
dst.write(r.data)
src.close()
dst.close()

# Invoke function asynchronously.
client.invoke_function('service_name', 'function_name', headers = {'x-fc-invocation-type': 'Async'})

# List services.
client.list_services()

# List functions with prefix and limit.
client.list_functions('service_name', prefix='the_prefix', limit=10)

# Delete service.
client.delete_service('service_name')

# Delete function.
client.delete_function('service_name', 'function_name')

Testing

To run the tests, please set the access key id/secret, endpoint as environment variables. Take the Linux system for example:

.. code-block:: bash

$ export ENDPOINT=<endpoint>
$ export ACCESS_KEY_ID=<AccessKeyId>
$ export ACCESS_KEY_SECRET=<AccessKeySecret>
$ export STS_TOKEN=<roleARN>

Run the test in the following method:

.. code-block:: bash

$ nosetests                          # First install nose

More resources

• Aliyun FunctionCompute docs <https://help.aliyun.com/product/50980.html>_

Contacting us

• Links <https://help.aliyun.com/document_detail/53087.html>_

License

• MIT <https://github.com/aliyun/fc-python-sdk/blob/master/LICENSE>_