reqPrepend

Inserts the specified content at the beginning of the existing request body (only valid for requests with a body, such as POST and PUT).

⚠️ Note: GET, HEAD, and other requests without a body are not affected.

Rule Syntax

pattern reqPrepend://value [filters...]

Parameters	Description	Detailed Documentation
pattern	An expression to match against the request URL	Match Pattern Documentation
value	Text or binary content. Supports the following types: • Directory/File Path • Remote URL • Inline/Embedded/Values Content	Operation Instruction Documentation
filters	Optional filters. Supports matching: • Request URL/Method/Header/Content • Response Status Code/Header	Filter Documentation

Configuration Example

Inline Method

www.example.com/path reqPrepend://(Hello) reqBody://(-test-) method://post

Requesting https://www.example.com/path/to will result in the request body becoming Hello-test-.

Inline/Values Method

``` body.txt
Hello world.
```
www.example.com/path reqPrepend://{body.txt} reqBody://(-test-) method://post

Requesting https://www.example.com/path/to will result in the request body becoming Hello world.-test-.

Local/Remote Resources

www.example.com/path1 reqPrepend:///User/xxx/test.txt
www.example.com/path2 reqPrepend://https://www.xxx.com/xxx/params.txt
# Editing a Temporary File
www.example.com/path3 reqPrepend://temp/blank.txt

Associated Protocols

1. Inject content before the request body: reqBody
2. Append content after the request body: reqAppend
3. Inject content before the response body: resPrepend