Facebook Graph API giving an unknown OAuthException

When I send a request to https://graph.facebook.com/me/home?acces开发者_JAVA技巧s_token=(access code goes here) Facebook gives me this error message:

{
   "error": {
      "type": "OAuthException",
      "message": "An unknown error has occurred."
   }
}

Every other API call works. If anybody knows anything about this issue, please help me.

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Facebook does not have very good error messages...

Apparantly, "An unknown error has occurred" means that I did not have valid permissions to access the user's news feed.

You have to include "read_stream" in your scope, or else facebook will reject your request with an ambiguous error message.

I <3 you facebook API

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In addition to the other answers provided here...

In our production app (working with thousands of access tokens for several years), it appears that we occasionally get this error due to a temporary glitch in the API. I'm still not sure what the root cause is, but simply retrying the API call a few minutes later seems to consistently resolve the issue for us.

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I get this error when the access token is the application's token. With the user-specific token, the api calls succeed.

Before the oauth upgrade, the application's token worked. The user-specific token worked and usually returned even more data.

Of course with facebook there's no way of knowing whether the current behavior (fails when using application token) is a bug or just the new way.

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According to http://developers.facebook.com/docs/reference/api/, the parameter is access_token, not access.

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I had this same issue and fixed it. For me, I was passing a single JSON object in the "batch" field, but Facebook wanted a JSON array.

For example, this will work, because it has a JSON array denoted by square brackets:

POST /v2.11 HTTP/1.1
Host: graph.facebook.com
Content-Type: application/json
Cache-Control: no-cache
{
"access_token":"YOUR_ACCESS_TOKEN",
"batch":[{"method":"GET", "relative_url":"me/friends?limit=50"}]
}

This will not, because there is no JSON array denoted by square brackets:

POST /v2.11 HTTP/1.1
Host: graph.facebook.com
Content-Type: application/json
Cache-Control: no-cache
{
"access_token":"YOUR_ACCESS_TOKEN",
"batch":{"method":"GET", "relative_url":"me/friends?limit=50"}
}