Learn how to get filtered results from REST API queries made in the Wowza Streaming Cloud™ service.
Using the filter parameter
To execute a request that returns filtered results, use the filter parameter in the query. The filter parameter restricts the data that gets returned to one or more values associated with a field.
You can use the filter parameter with any GET call to the transcoders endpoint:
https://api.cloud.wowza.com/api/[version]/transcoders
To use the filter parameter, append the query URL with a two-part expression that specifies the field on which to filter and the logic (comparison operator) to use to filter. Use the syntax
?filter[n][field]=value&filter[n][comparison operator]=value
where
n is a zero-based index.
You can use as many filters as you want, combining them with an ampersand (&). Order doesn't matter; multiple filters are additive.
Filter fields
| Field | Description |
| created_at | The date and time the transcoder was created. Format as YYYY-MM-DDTHH:MM:SS.000Z where HH is a 24-hour clock in UTC.
|
| id | The unique, eight-character alphanumeric string that identifies the transcoder. |
| name | The descriptive name of the transcoder. |
| state | The state of the transcoder. Valid values are starting, stopping, started, stopped, and resetting. |
Filter comparision operators
| Operator | Description |
| eq | Equals. Accepts one value. Returns only data whose field equals that value. |
| in | Equals any of. Accepts a comma-separated string of values. Returns any item whose field includes any of those values. |
Example requests
Notes:
- To authenticate API requests, use HMAC authentication for production environments. For testing or proof of concept purposes only, use API key and access key authentication.
- The curl examples below use environment variables. See Using cURL for more information on how to set these up.
- If you're using a request tool that has a globbing parser, turn off the parser so that the brackets don't generate an error. In cURL, pass the -g flag with the request.
Return only transcoders whose state is stopped:
curl -X GET -g \
-H "wsc-api-key: ${WSC_API_KEY}" \
-H "wsc-access-key: ${WSC_ACCESS_KEY}" \
"${WSC_HOST}/api/${WSC_VERSION}/transcoders/?filter[0][field]=state&filter[0][eq]=stopped"
Return all transcoders that aren't actively running (all transcoders whose state isn't started):
curl -X GET -g \
-H "wsc-api-key: ${WSC_API_KEY}" \
-H "wsc-access-key: ${WSC_ACCESS_KEY}" \
"${WSC_HOST}/api/${WSC_VERSION}/transcoders/?filter[0][field]=state&filter[0][in]=starting,resetting,stopping,stopped"
Return only transcoders that are started and have the name MyTranscoder or MyOtherTranscoder:
curl -X GET -g \
-H "wsc-api-key: ${WSC_API_KEY}" \
-H "wsc-access-key: ${WSC_ACCESS_KEY}" \
"${WSC_HOST}/api/${WSC_VERSION}/transcoders/?filter[0][field]=state&filter[0][eq]=started&filter[1][field]=name&filter[1][in]=MyTranscoder,MyOtherTranscoder"
