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Facebook Graph API BATCH Request With Post Method

i am trying to send a batch request with graph api batch request using axios. When I tried with postman i tried the following - I am trying to post a send api with batch request.

url = https://graph.facebook.com?access_token=EA...`.
raw body  = `{
    "batch":[
  {
    "method": "POST",
    "relative_url": "me/messages?access_token=<ACCESS_TOKEN>",
    "body": "{ \"messaging_type\": \"MESSAGE_TAG\",\r\n         \"tag\": \"ISSUE_RESOLUTION\",\r\n        \"recipient\": {\r\n          \"id\": \"1111944272264076\"\r\n        },\r\n        \"message\": {\r\n          \"text\": \"hello, world!\"\r\n        }}"
  }
]
}

and the response is

[
    {
        "code": 400,
        "headers": [
            {
                "name": "WWW-Authenticate",
                "value": "OAuth \"Facebook Platform\" \"invalid_request\" \"(#100) The parameter recipient is required\""
            },
            {
                "name": "Expires",
                "value": "Sat, 01 Jan 2000 00:00:00 GMT"
            },
            {
                "name": "Strict-Transport-Security",
                "value": "max-age=15552000; preload"
            },
            {
                "name": "Facebook-API-Version",
                "value": "v2.10"
            },
            {
                "name": "Content-Type",
                "value": "text/javascript; charset=UTF-8"
            },
            {
                "name": "X-App-Usage",
                "value": "{\"call_count\":0,\"total_cputime\":0,\"total_time\":0}"
            },
            {
                "name": "Access-Control-Allow-Origin",
                "value": "*"
            },
            {
                "name": "Cache-Control",
                "value": "no-store"
            },
            {
                "name": "Vary",
                "value": "Accept-Encoding"
            },
            {
                "name": "Pragma",
                "value": "no-cache"
            }
        ],
        "body": "{\"error\":{\"message\":\"(#100) The parameter recipient is required\",\"type\":\"OAuthException\",\"code\":100,\"fbtrace_id\":\"BdrR5exbYCu\"}}"
    }
]

response code is 200. i have given recipient in body.

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Answer

You don't need to URL encode the entire body. Only the content of each parameter. Try this as the body for request:

{
 "batch":[
  {
   "method":"POST",
   "relative_url":"me/messages", 
   "body": "recipient={\"id\": \"1111944272264076\"}&message={\"text\": \"hello, world!\"}"
  }
 ]
}

Note: Instead of URL coding, I just escaped the characters. Makes the code much more readable

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source: stackoverflow.com
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