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batch-requests.md

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batch-requests

Summary

Description

batch-requests can accept multiple request and send them from apisix via http pipeline, and return an aggregated response to client, which can significantly improve performance when the client needs to access multiple APIs.

Tips

The HTTP headers for the outer batch request, except for the Content- headers such as Content-Type, apply to every request in the batch. If you specify a given HTTP header in both the outer request and the individual call, the header's value of individual call would override the outer batch request header's value. The headers for an individual call apply only to that call.

Attributes

None

API

This plugin will add /apisix/batch-requests as the endpoint. You may need to use public-api plugin to expose it.

How To Enable

Enable the batch-requests plugin in the config.yaml:

# Add this in config.yaml
plugins:
  - ... # plugin you need
  - batch-requests

How To Configure

By default, the maximum body size sent to the /apisix/batch-requests can't be larger than 1 MiB. You can configure it via apisix/admin/plugin_metadata/batch-requests:

curl http://127.0.0.1:9080/apisix/admin/plugin_metadata/batch-requests -H 'X-API-KEY: edd1c9f034335f136f87ad84b625c8f1' -X PUT -d '
{
    "max_body_size": 4194304
}'

Metadata

Name Type Requirement Default Valid Description
max_body_size integer required 1048576 > 0 the maximum of request body size in bytes

Batch API Request/Response

The plugin will create a API in apisix to handle your batch request.

Batch API Request:

Name Type Requirement Default Valid Description
query object optional Specify QueryString for all request
headers object optional Specify Header for all request
timeout integer optional 30000 Aggregate API timeout in ms
pipeline HttpRequest required Request's detail

HttpRequest

Name Type Requirement Default Valid Description
version string optional 1.1 [1.0, 1.1] http version
method string optional GET ["GET", "POST", "PUT", "DELETE", "PATCH", "HEAD", "OPTIONS", "CONNECT", "TRACE"] http method
query object optional request's QueryString, if Key is conflicted with global query, this setting's value will be used.
headers object optional request's Header, if Key is conflicted with global headers, this setting's value will be used.
path string required http request's path
body string optional http request's body
ssl_verify boolean optional false verify if SSL cert matches hostname.

Batch API Response：

Response is Array of HttpResponse.

HttpResponse

Name Type Description
status integer http status code
reason string http reason phrase
body string http response body
headers object http response headers

How to specify custom uri

We can change the default uri in the plugin_attr section of conf/config.yaml.

Name Type Requirement Default Description
uri string optional "/apisix/batch-requests" uri to use with batch-requests plugin

Here is an example:

plugin_attr:
  batch-requests:
    uri: "/api-gw/batch"

Test Plugin

You can pass your request detail to batch API( /apisix/batch-requests ), apisix can automatically complete requests via http pipeline. Such as:

curl --location --request POST 'http://127.0.0.1:9080/apisix/batch-requests' \
--header 'Content-Type: application/json' \
--data '{
    "headers": {
        "Content-Type": "application/json",
        "admin-jwt":"xxxx"
    },
    "timeout": 500,
    "pipeline": [
        {
            "method": "POST",
            "path": "/community.GiftSrv/GetGifts",
            "body": "test"
        },
        {
            "method": "POST",
            "path": "/community.GiftSrv/GetGifts",
            "body": "test2"
        }
    ]
}'

response as below：

[
    {
        "status": 200,
        "reason": "OK",
        "body": "{\"ret\":500,\"msg\":\"error\",\"game_info\":null,\"gift\":[],\"to_gets\":0,\"get_all_msg\":\"\"}",
        "headers": {
            "Connection": "keep-alive",
            "Date": "Sat, 11 Apr 2020 17:53:20 GMT",
            "Content-Type": "application/json",
            "Content-Length": "81",
            "Server": "APISIX web server"
        }
    },
    {
        "status": 200,
        "reason": "OK",
        "body": "{\"ret\":500,\"msg\":\"error\",\"game_info\":null,\"gift\":[],\"to_gets\":0,\"get_all_msg\":\"\"}",
        "headers": {
            "Connection": "keep-alive",
            "Date": "Sat, 11 Apr 2020 17:53:20 GMT",
            "Content-Type": "application/json",
            "Content-Length": "81",
            "Server": "APISIX web server"
        }
    }
]

Disable Plugin

Normally, you don't need to disable this plugin. If you do need, please make a new list of plugins you need in /conf/config.yaml to cover the original one.