Add native fetch client section for remote service consumption#2519
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Add native fetch client section for remote service consumption#2519
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| #### Native Fetch Client <Beta /> {#native-fetch} | ||
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| As an alternative to SAP Cloud SDK, CAP can use Node.js's built-in `fetch` API for remote service calls. Native fetch is selected per request based on the following rules, in that order: |
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| As an alternative to SAP Cloud SDK, CAP can use Node.js's built-in `fetch` API for remote service calls. Native fetch is selected per request based on the following rules, in that order: | |
| As an alternative to SAP Cloud SDK, CAP can use Node.js's built-in `fetch` API for remote service calls. Native fetch is selected per request based on the following rules: |
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| As an alternative to SAP Cloud SDK, CAP can use Node.js's built-in `fetch` API for remote service calls. Native fetch is selected per request based on the following rules, in that order: | ||
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| 1. If the destination requires features only available in CloudSDK (e.g., BTP Destination Service resolution or non-basic authentication), CloudSDK is always used. |
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| 1. If the destination requires features only available in CloudSDK (e.g., BTP Destination Service resolution or non-basic authentication), CloudSDK is always used. | |
| 1. If the destination requires features only available in SAP Cloud SDK (for example, SAP BTP Destination service resolution or non-basic authentication), the SAP Cloud SDK is always used. |
| 3. Otherwise, native fetch is used when `@sap-cloud-sdk/http-client` is not installed. | ||
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| ::: warning Current limitations | ||
| The native fetch client does not yet support named destinations via BTP Destination Service, only [application defined destinations](../services/consuming-services#use-application-defined-destinations). Authentication is limited to `NoAuthentication` and `BasicAuthentication`. CSRF token handling is not yet fully on par with SAP Cloud SDK. |
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| The native fetch client does not yet support named destinations via BTP Destination Service, only [application defined destinations](../services/consuming-services#use-application-defined-destinations). Authentication is limited to `NoAuthentication` and `BasicAuthentication`. CSRF token handling is not yet fully on par with SAP Cloud SDK. | |
| The native fetch client does not yet support named destinations using the SAP BTP Destination service. Only [application defined destinations](../services/consuming-services#use-application-defined-destinations) are supported. In addition, authentication is limited to `NoAuthentication` and `BasicAuthentication`. CSRF token handling is not yet at parity with SAP Cloud SDK. |
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