Batch.run
From Facebook Developer Wiki
Contents |
Description
Executes a list of individual API calls in a single batch.
The batch API allows you to combine multiple individual operations into a single request. This could reduce the traffic load to Facebook server and latency substantially.
Note that there is limit of 20 individual operations that can be performed in a single batch execution.
Parameters
| Required | Name | Type | Description | |
| required | api_key | string | The application key associated with the calling application. If you specify the API key in your client, you don't need to pass it with every call. | |
|---|---|---|---|---|
| call_id | float | The request's sequence number. Each successive call for any session must use a sequence number greater than the last. We suggest using the current time in milliseconds, such as PHP's microtime(true) function. If you specify the call ID in your client, you don't need to pass it with every call. | ||
| sig | string | An MD5 hash of the current request and your secret key, as described in the How Facebook Authenticates Your Application. Facebook computes the signature for you automatically. | ||
| v | string | This must be set to 1.0 to use this version of the API. If you specify the version in your client, you don't need to pass it with every call. | ||
| method_feed | string | A JSON encoded array of strings. Each element in the array should contain the full parameters for a method, including method name, sig, etc. Currently, there is a maximum limit of 15 elements in the array. | ||
| optional | serial_only | bool | An optional parameter to indicate whether the methods in the method_feed must be executed in order. The default value is false. | |
| format | string | The desired response format, which can be either XML or JSON. (Default value is XML.) | ||
| callback | string | Name of a function to call. This is primarily to enable cross-domain javascript requests using the <script> tag, sometimes known as "JSONP". This works with both XML and JSON. |
Response
An array of individual results as strings.
Example Return XML
<?xml version="1.0" encoding="UTF-8"?>
<batch_run_response xmlns="http://api.facebook.com/1.0/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://api.facebook.com/1.0/ http://api.facebook.com/1.0/facebook.xsd" list="true">
<batch_run_response_elt><?xml version="1.0" encoding="UTF-8"?>
<friends_get_response xmlns="http://api.facebook.com/1.0/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://api.facebook.com/1.0/ http://api.facebook.com/1.0/facebook.xsd" list="true">
<uid>1160</uid>
</friends_get_response>
</batch_run_response_elt>
</batch_run_response>
FQL Equivalent
FQL queries take the form: SELECT <fields> FROM <table> WHERE <conditions>
There is no equivalent FQL query.
Error Codes
| Code | Description | |
| 1 | An unknown error occurred. Please resubmit the request. | |
|---|---|---|
| 2 | The service is not available at this time. | |
| 4 | The application has reached the maximum number of requests allowed. More requests are allowed once the time window has completed. | |
| 5 | The request came from a remote address not allowed by this application. | |
| 100 | One of the parameters specified was missing or invalid. | |
| 101 | The API key submitted is not associated with any known application. | |
| 102 | The session key was improperly submitted or has reached its timeout. Direct the user to log in again to obtain another key. | |
| 103 | The submitted call_id was not greater than the previous call_id for this session. | |
| 104 | Incorrect signature. | |
| 950 | Each batch API cannot contain more than 20 items. |
Notes
You can call this method using a session secret, and not the application secret (for example, for a Facebook Connect site or desktop application).
