示例2：创建函数和APIG触发器获取静态页面

场景描述

本章节以Python 2.7为例，指导您通过API创建FunctionGraph函数和APIG触发器，并且通过APIG触发器调用API，获取静态页面。

API的调用方法请参见如何调用API。

前提条件

已在API网关服务中创建API分组，并记录API分组的ID和分配的子域名。

总体思路

创建FunctionGraph函数和APIG触发器，并且通过APIG触发器触发API获取静态页面，步骤如下：

1. 创建函数：创建一个返回的静态页面函数。
2. 创建触发器：创建APIG触发器。
3. 通过APIG触发器调用API，获取静态页面。

步骤1：创建一个返回的静态页面函数

URI：POST /v2/{project_id}/fgs/functions

API文档详情请参见：创建函数

• 请求示例

  POST  https://{Endpoint}/v2/{project_id}/fgs/functions
  {
   "code_filename": "index.zip",
   "code_type": "inline",
   "func_code": {
    "file": "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"
   },
   "func_name": "get_html",
   "handler": "index.handler",
   "memory_size": 256,
   "package": "default",
   "runtime": "Python2.7",
   "timeout": 5
  }

• 响应示例

  {
   "func_urn": "urn:fss:{project_name}:{project_id}:function:default:get_html:latest",
   "func_name": "get_html",
   "domain_id": "89fexxxd636",
   "namespace": "{project_id}",
   "project_name": "xxx",
   "package": "default",
   "runtime": "Python2.7",
   "timeout": 5,
   "handler": "index.handler",
   "memory_size": 256,
   "cpu": 400,
   "code_type": "inline",
   "code_filename": "index.zip",
   "code_size": 884,
   "digest": "b08fef5e97dd130037978db07f0e9109aa43a191517cd1196bcab822f17dddcf37f7506a15691177962f9803ba6d170a1c87aafb4fa1b9f0d07f9415642b26d2",
   "version": "latest",
   "image_name": "latest-200604105808@we0qo",
   "last_modified": "2020-06-04T10:58:08+08:00",
   "strategy_config": {
    "concurrency": -1
   },
   "StrategyConfig": {},
   "enterprise_project_id": "0"
  }

  记录函数的URN，即响应示例中的“func_urn”信息。

步骤2：创建APIG触发器

URI：POST /v2/{project_id}/fgs/triggers/{function_urn}

API文档详情请参见：创建触发器

• 请求示例

  POST  https://{Endpoint}/v2/{project_id}/fgs/triggers/{function_urn}
  {
   "event_data": {
    "group_id": "a9ad0d5df4d7475c9bc35a7c17d89304",
    "env_id": "DEFAULT_ENVIRONMENT_RELEASE_ID",
    "auth": "NONE",
    "protocol": "HTTP",
    "name": "API_GetHtml",
    "path": "/test",
    "match_mode": "SWA",
    "req_method": "ANY",
    "backend_type": "FUNCTION",
    "sl_domain": "a9ad0d5df4d7475c9bc35a7c17d89304.apig.xxx.xxxapis.com",
    "type": 1,
    "env_name": "RELEASE"
   },
   "event_type_code": "APICreated",
   "trigger_status": "ACTIVE",
   "trigger_type_code": "APIG"
  }

  function_urn为步骤1：创建一个返回的静态页面函数中记录的函数URN，group_id为API分组的ID，sl_domain为APIG给API分组分配的子域名。

• 响应示例

  {
   "trigger_id": "1b3ec74b86454aa39001a9f89cc70ee2",
   "trigger_type_code": "APIG",
   "trigger_status": "ACTIVE",
   "event_data": {
    "api_id": "cbc698153d1f4265bdd8384b5cf6e581",
    "api_name": "API_GetHtml",
    "auth": "NONE",
    "env_id": "",
    "env_name": "",
    "func_info": {
     "function_urn": "urn:fss:{project_name}:{project_id}:function:default:get_html",
     "invocation_type": "sync",
     "timeout": 5000,
     "version": "latest"
    },
    "group_id": "a9ad0d5df4d7475c9bc35a7c17d89304",
    "group_name": "APIGroup_gethtml",
    "invoke_url": "http://a9ad0d5df4d7475c9bc35a7c17d89304.apig.xxx.xxxapis.com/test",
    "match_mode": "SWA",
    "name": "API_GetHtml",
    "path": "/test",
    "protocol": "HTTP",
    "req_method": "ANY",
    "triggerid": "1b3ec74b86454aa39001a9f89cc70ee2",
    "type": 1
   },
   "last_updated_time": "2020-06-04T17:14:32+08:00",
   "created_time": "2020-06-04T17:14:32+08:00"
  }

  记录“invoke_url”的值。

步骤3：通过APIG触发器调用API，获取静态页面

在浏览器输入“invoke_url”的值，调用API，获取静态页面。

图1 调用API