Modify, add, remove, or pass along specific request headers going upstream towards the origin.
Why do you need it?
Use this behavior to decide how selected request headers going upstream towards the origin should be processed. For example, you can add headers such as User-Agent to inform the server about the user’s browser, or use custom headers to control authorization. By controlling the content of your headers you can further customize your website visitor’s experience and gain insight into how they use it.
How it works
When enabled, this behavior modifies the specified outgoing request header according to set rules.
Features and options
| Field | What it does | Sub-options |
|---|---|---|
| Action | Specifies the action to perform on the header. |
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| Select Header Name | Select from standard pre-defined headers to modify. | With Action set to Add, Modify or Find & Replace.
With Action set to Remove.
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| Header Value | With Action set to Add, enter your HTTP header value.
Variable Support: This option supports variable expression syntax. Typing {{ in the option field triggers variable auto complete. Learn more about variable support. |
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| Custom Header Name | With Select Header Name set to Other…, enter a custom HTTP header name.
Variable Support: This option supports variable expression syntax. Typing {{ in the option field triggers variable auto complete. Learn more about variable support. |
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| New Header Value | With Action set to Modify, enter your new HTTP header value.
Variable Support: This option supports variable expression syntax. Typing {{ in the option field triggers variable auto complete. Learn more about variable support. |
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| Avoid Duplicate Headers | With Action set to Modify, prevents multiple headers with the same name from being created. | |
| Find What | With Action set to Find & Replace, finds a string matching the string you enter.
Variable Support: This option supports variable expression syntax. Typing {{ in the option field triggers variable auto complete. Learn more about variable support. |
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| Replace With | With Action set to Find & Replace, replaces the matched string with the string you enter.
Variable Support: This option supports variable expression syntax. Typing {{ in the option field triggers variable auto complete. Learn more about variable support. |
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| Occurrences | With Action set to Find & Replace, replaces only the first instance of the old value, or replaces every occurrence. |
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