http language: dynamic variables

[sassman]

Extension to the http language file format #5

Request with dynamic variables in the body.

This feature should be behind a feature flag for the IntelliJ flavor --flavor intellij.

The marking symbol for a dynamic variable is the $ that is prefixed to the variable name.

IntelliJ's HTTP Client docs are 11 variables defined.

Special cases

• {{ $processEnv envVarName }}: allows the resolution of a local machine environment variable to a string value. E.g. the USERNAME variable:
  GET https://httpbin.org/get?user={{ $processEnv USERNAME }}

Example 1

### Send request with dynamic variables in request's body
POST https://httpbin.org/post
Content-Type: application/json

{
  "id": {{$uuid}},
  "price": {{$randomInt}},
  "ts": {{$timestamp}},
  "value": "content"
}

Example 2

The alternative approach is to call the functions that are bound to the dynamic variables directly:

### Send request with dynamic variables in request's body
POST https://httpbin.org/post
Content-Type: application/json

{
  "id": {{ uuid() }},
  "price": {{ randomInt() }},
  "ts": {{ timestamp() }},
  "value": "content"
}