Extract and assign variables
Sample use case
Extract variables from an XML and JSON response messages. Assign variables to HTTP response headers.
This sample uses these policies:
- Extract Variables: To pull subsets of data from the response body.
- XML to JSON: To convert the response from XML to JSON.
- Assign Message: To assign extracted data to response headers.
- Reads extracted variables so they are visible in the Trace tool.
- Extract variables from the XML response sent from the target. Use XPath syntax to identify the data to extract.
- Convert the response payload from XML to JSON.
- Extract more variables from the converted JSON payload. Use JSONPath syntax to identify the data to extract.
- Assign the extracted variables to HTTP response headers.
Set up, deploy, invoke
Edit this script with your environment details:
The proxy returns these custom headers to the client:
mock.city: San Jose mock.state: CA mock.firstName: John mock.lastName: Doe
See the main project README file for more detailed information about setting up, deploying, and invoking sample proxies.
This screen shot from the Apigee Edge trace tool shows the placement of the policies used in this sample.
- Variables reference
- Introduction to flow variables
- Video: Using Extract Variables policy
- Video: Extracting variables from XML and JSON messages
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