传统框架部署到 Serverless 架构的利与弊

from flask import Flask, redirect, url_for, request
import jieba
import jieba.analyse
 
app = Flask(__name__)
 
 
@app.route('/hello/<name>')
def success(name):
    return 'hello %s' % name
 
 
@app.route('/welcome/post', methods=['POST'])
def welcome_post():
    user = request.form['name']
    return 'POST %s' % user
 
 
@app.route('/welcome/get', methods=['GET'])
def welcome_get():
    user = request.args.get('name')
    return 'GET %s' % user
 
 
@app.route('/jieba/', methods=['GET'])
def jieba_test():
    str = "Serverless Framework 是业界非常受欢迎的无服务器应用框架，开发者无需关心底层资源即可部署完整可用的 Serverless 应用架构。Serverless Framework 具有资源编排、自动伸缩、事件驱动等能力，覆盖编码、调试、测试、部署等全生命周期，帮助开发者通过联动云资源，迅速构建 Serverless 应用。"
    print(", ".join(jieba.cut(str)))
    print(jieba.analyse.extract_tags(str, topK=20, withWeight=False, allowPOS=()))
    print(jieba.analyse.textrank(str, topK=20, withWeight=False, allowPOS=('ns', 'n', 'vn', 'v')))
    return 'success'
 
 
if __name__ == '__main__':
    app.run(debug=True)
展开 

FlaskComponent:
  component: '@gosls/tencent-flask'
  inputs:
    region: ap-beijing
    functionName: Flask_Component
    code: ./flask_component
    functionConf:
      timeout: 10
      memorySize: 128
      environment:
        variables:
          TEST: vale
      vpcConfig:
        subnetId: ''
        vpcId: ''
    apigatewayConf:
      protocols:
        - http
      environment: release

===========task end===========
total:301,succ:301,fail:0,except:0
response maxtime: 1.2727971077
response mintime 0.573610067368
 
===========task end===========
total:301,succ:301,fail:0,except:0
response maxtime: 1.1745698452
response mintime 0.172255039215
 
===========task end===========
total:301,succ:301,fail:0,except:0
response maxtime: 1.2857568264
response mintime 0.157210826874

===========task end===========
total:301,succ:301,fail:0,except:0
response maxtime: 3.41151213646
response mintime 0.255661010742
 
===========task end===========
total:301,succ:301,fail:0,except:0
response maxtime: 3.37784004211
response mintime 0.212490081787
 
===========task end===========
total:301,succ:301,fail:0,except:0
response maxtime: 3.39548277855
response mintime 0.439364910126

import app  # Replace with your actual application
import severless_wsgi
 
# If you need to send additional content types as text, add then directly
# to the whitelist:
#
# serverless_wsgi.TEXT_MIME_TYPES.append("application/custom+json")
 
def handler(event, context):
    return severless_wsgi.handle_request(app.app, event, context)

import sys
 
try:
    from urllib import urlencode
except ImportError:
    from urllib.parse import urlencode
 
from flask import Flask
 
try:
    from cStringIO import StringIO
except ImportError:
    try:
        from StringIO import StringIO
    except ImportError:
        from io import StringIO
 
from werkzeug.wrappers import BaseRequest
 
__version__ = '0.0.4'
 
 
def make_environ(event):
    environ = {}
    for hdr_name, hdr_value in event['headers'].items():
        hdr_name = hdr_name.replace('-', '_').upper()
        if hdr_name in ['CONTENT_TYPE', 'CONTENT_LENGTH']:
            environ[hdr_name] = hdr_value
            continue
 
        http_hdr_name = 'HTTP_%s' % hdr_name
        environ[http_hdr_name] = hdr_value
 
    apigateway_qs = event['queryStringParameters']
    request_qs = event['queryString']
    qs = apigateway_qs.copy()
    qs.update(request_qs)
 
    body = ''
    if 'body' in event:
        body = event['body']
 
    environ['REQUEST_METHOD'] = event['httpMethod']
    environ['PATH_INFO'] = event['path']
    environ['QUERY_STRING'] = urlencode(qs) if qs else ''
    environ['REMOTE_ADDR'] = 80
    environ['HOST'] = event['headers']['host']
    environ['SCRIPT_NAME'] = ''
    environ['SERVER_PORT'] = 80
    environ['SERVER_PROTOCOL'] = 'HTTP/1.1'
    environ['CONTENT_LENGTH'] = str(len(body))
    environ['wsgi.url_scheme'] = ''
    environ['wsgi.input'] = StringIO(body)
    environ['wsgi.version'] = (1, 0)
    environ['wsgi.errors'] = sys.stderr
    environ['wsgi.multithread'] = False
    environ['wsgi.run_once'] = True
    environ['wsgi.multiprocess'] = False
 
    BaseRequest(environ)
 
    return environ
 
 
class LambdaResponse(object):
    def __init__(self):
        self.status = None
        self.response_headers = None
 
    def start_response(self, status, response_headers, exc_info=None):
        self.status = int(status[:3])
        self.response_headers = dict(response_headers)
 
 
class FlaskLambda(Flask):
    def __call__(self, event, context):
        if 'httpMethod' not in event:
            print('httpMethod not in event')
            return super(FlaskLambda, self).__call__(event, context)
 
        response = LambdaResponse()
 
        body = next(self.wsgi_app(
            make_environ(event),
            response.start_response
        ))
 
        return {
            'statusCode': response.status,
            'headers': response.response_headers,
            'body': body
        }
展开 

from flask import Flask
app = Flask(__name__)

import os
from django.core.wsgi import get_wsgi_application
os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'mydjango.settings')
application = get_wsgi_application()

# -*- coding: utf-8 -*-
 
import os
import sys
import base64
from werkzeug.datastructures import Headers, MultiDict
from werkzeug.wrappers import Response
from werkzeug.urls import url_encode, url_unquote
from werkzeug.http import HTTP_STATUS_CODES
from werkzeug._compat import BytesIO, string_types, to_bytes, wsgi_encoding_dance
import mydjango.wsgi
 
TEXT_MIME_TYPES = [
    "application/json",
    "application/javascript",
    "application/xml",
    "application/vnd.api+json",
    "image/svg+xml",
]
 
 
def all_casings(input_string):
    if not input_string:
        yield ""
    else:
        first = input_string[:1]
        if first.lower() == first.upper():
            for sub_casing in all_casings(input_string[1:]):
                yield first + sub_casing
        else:
            for sub_casing in all_casings(input_string[1:]):
                yield first.lower() + sub_casing
                yield first.upper() + sub_casing
 
 
def split_headers(headers):
    """
    If there are multiple occurrences of headers, create case-mutated variations
    in order to pass them through APIGW. This is a hack that's currently
    needed. See: https://github.com/logandk/serverless-wsgi/issues/11
    Source: https://github.com/Miserlou/Zappa/blob/master/zappa/middleware.py
    """
    new_headers = {}
 
    for key in headers.keys():
        values = headers.get_all(key)
        if len(values) > 1:
            for value, casing in zip(values, all_casings(key)):
                new_headers[casing] = value
        elif len(values) == 1:
            new_headers[key] = values[0]
 
    return new_headers
 
 
def group_headers(headers):
    new_headers = {}
 
    for key in headers.keys():
        new_headers[key] = headers.get_all(key)
 
    return new_headers
 
 
def encode_query_string(event):
    multi = event.get(u"multiValueQueryStringParameters")
    if multi:
        return url_encode(MultiDict((i, j) for i in multi for j in multi[i]))
    else:
        return url_encode(event.get(u"queryString") or {})
 
 
def handle_request(application, event, context):
 
    if u"multiValueHeaders" in event:
        headers = Headers(event["multiValueHeaders"])
    else:
        headers = Headers(event["headers"])
 
    strip_stage_path = os.environ.get("STRIP_STAGE_PATH", "").lower().strip() in [
        "yes",
        "y",
        "true",
        "t",
        "1",
    ]
    if u"apigw.tencentcs.com" in headers.get(u"Host", u"") and not strip_stage_path:
        script_name = "/{}".format(event["requestContext"].get(u"stage", ""))
    else:
        script_name = ""
 
    path_info = event["path"]
    base_path = os.environ.get("API_GATEWAY_BASE_PATH")
    if base_path:
        script_name = "/" + base_path
 
        if path_info.startswith(script_name):
            path_info = path_info[len(script_name) :] or "/"
 
    if u"body" in event:
        body = event[u"body"] or ""
    else:
        body = ""
 
    if event.get("isBase64Encoded", False):
        body = base64.b64decode(body)
    if isinstance(body, string_types):
        body = to_bytes(body, charset="utf-8")
 
    environ = {
        "CONTENT_LENGTH": str(len(body)),
        "CONTENT_TYPE": headers.get(u"Content-Type", ""),
        "PATH_INFO": url_unquote(path_info),
        "QUERY_STRING": encode_query_string(event),
        "REMOTE_ADDR": event["requestContext"]
        .get(u"identity", {})
        .get(u"sourceIp", ""),
        "REMOTE_USER": event["requestContext"]
        .get(u"authorizer", {})
        .get(u"principalId", ""),
        "REQUEST_METHOD": event["httpMethod"],
        "SCRIPT_NAME": script_name,
        "SERVER_NAME": headers.get(u"Host", "lambda"),
        "SERVER_PORT": headers.get(u"X-Forwarded-Port", "80"),
        "SERVER_PROTOCOL": "HTTP/1.1",
        "wsgi.errors": sys.stderr,
        "wsgi.input": BytesIO(body),
        "wsgi.multiprocess": False,
        "wsgi.multithread": False,
        "wsgi.run_once": False,
        "wsgi.url_scheme": headers.get(u"X-Forwarded-Proto", "http"),
        "wsgi.version": (1, 0),
        "serverless.authorizer": event["requestContext"].get(u"authorizer"),
        "serverless.event": event,
        "serverless.context": context,
        # TODO: Deprecate the following entries, as they do not comply with the WSGI
        # spec. For custom variables, the spec says:
        #
        #   Finally, the environ dictionary may also contain server-defined variables.
        #   These variables should be named using only lower-case letters, numbers, dots,
        #   and underscores, and should be prefixed with a name that is unique to the
        #   defining server or gateway.
        "API_GATEWAY_AUTHORIZER": event["requestContext"].get(u"authorizer"),
        "event": event,
        "context": context,
    }
 
    for key, value in environ.items():
        if isinstance(value, string_types):
            environ[key] = wsgi_encoding_dance(value)
 
    for key, value in headers.items():
        key = "HTTP_" + key.upper().replace("-", "_")
        if key not in ("HTTP_CONTENT_TYPE", "HTTP_CONTENT_LENGTH"):
            environ[key] = value
 
    response = Response.from_app(application, environ)
 
    returndict = {u"statusCode": response.status_code}
 
    if u"multiValueHeaders" in event:
        returndict["multiValueHeaders"] = group_headers(response.headers)
    else:
        returndict["headers"] = split_headers(response.headers)
 
    if event.get("requestContext").get("elb"):
        # If the request comes from ALB we need to add a status description
        returndict["statusDescription"] = u"%d %s" % (
            response.status_code,
            HTTP_STATUS_CODES[response.status_code],
        )
 
    if response.data:
        mimetype = response.mimetype or "text/plain"
        if (
            mimetype.startswith("text/") or mimetype in TEXT_MIME_TYPES
        ) and not response.headers.get("Content-Encoding", ""):
            returndict["body"] = response.get_data(as_text=True)
            returndict["isBase64Encoded"] = False
        else:
            returndict["body"] = base64.b64encode(response.data).decode("utf-8")
            returndict["isBase64Encoded"] = True
 
    return returndict
 
 
 
def main_handler(event, context):
    return handle_request(mydjango.wsgi.application, event, context)
展开 

from django.shortcuts import render
from django.http import HttpResponse
from django.views.decorators.csrf import csrf_exempt
 
# Create your views here.
@csrf_exempt
def hello(request):
    if request.method == "POST":
        return HttpResponse("Hello world ! " + request.POST.get("name"))
    if request.method == "GET":
        return HttpResponse("Hello world ! " + request.GET.get("name"))

const { Component } = require('@serverless/core')
class TencentDjango extends Component {
  async default(inputs = {}) {
  }
  async remove(inputs = {}) {
  }
}
module.exports = TencentDjango

const tencentCloudFunction = await this.load('@serverless/tencent-scf'
const tencentCloudFunctionOutputs = await tencentCloudFunction(inputs)

DjangoTest:
  component: '@serverless/tencent-django'
  inputs:
    region: ap-guangzhou
    functionName: DjangoFunctionTest
    djangoProjectName: mydjango
    code: ./
    functionConf:
      timeout: 10
      memorySize: 256
      environment:
        variables:
          TEST: vale
      vpcConfig:
        subnetId: ''
        vpcId: ''
    apigatewayConf:
      protocols:
        - http
      environment: release