feat: Playground

[joncrangle]

Migrating prior work over to utilize the new api/modifiers endpoint and codegen structs.

Outstanding todos

• Testing

Complete

• Link to playground from form.html

Export yaml button

• Parse JSON to YAML - used js-yaml package
• Download YAML file

Injection scripts modal

• Javascript syntax highlighting within textarea layout, styling and event listeners - overlap code and textarea tags - used prism.js
• Textarea handlers and logic for javascript (e.g. tab, newline)

Potential future improvements

• Group related modifiers in Ninja Keys under a parent - empty function for parent, use function Comments to specify children; specify parent in children?
• Untoggle related items that may be toggled (e.g. should only have one masquerade as bot toggled) - use function Comments to specify items that should be untoggled?

[ladddder]

I'll have a closer look today.

[ladddder]

I tried this Article : https://www.nytimes.com/2023/12/10/us/harvard-president-claudine-gay.html
And did not manage to get a result as on the default route. I assume the default does not apply on the playground.

[joncrangle]

The proxy route applies some modifications by default:

SetRequestModifications(
	rx.AddCacheBusterQuery(),
	rx.MasqueradeAsGoogleBot(),
	rx.ForwardRequestHeaders(),
	rx.DeleteOutgoingCookies(),
	rx.SpoofReferrerFromRedditPost(),
).
AddResponseModifications(
	tx.ForwardResponseHeaders(),
	tx.BlockThirdPartyScripts(),
	tx.DeleteIncomingCookies(),
	tx.DeleteLocalStorageData(),
	tx.DeleteSessionStorageData(),
	tx.BypassCORS(),
	tx.BypassContentSecurityPolicy(),
	tx.RewriteHTMLResourceURLs(),
	tx.PatchDynamicResourceURLs(),
	tx.PatchTrackerScripts(),
)

Currently, the playground is completely blank - no modifications applied unless the user selects them, but we could very easily apply some sensible defaults if that makes more sense by adding them within playground.go:

return proxychain.
	NewProxyChain().
	SetFiberCtx(c).
	WithAPIPath(path).
	AddResponseModifications(
		// sensible defaults
	).
	AddResponseModifications(
		// sensible defaults
	).
	AddOnceRequestModifications(modificationData.RequestModifications...).
	AddOnceResponseModifications(modificationData.ResponseModifications...).
	Execute()