Improve Response verbose/debug logging

src/http/lifecycle/Response.ts

@@ -100,6 +100,7 @@ export class Response {
 
     /** Set the value of the response header. */
     public setHeader(name: string, value: string | string[]): this {
+        this.logging.verbose(`Will set header on response: ${name}`)
         if ( this.sentHeaders ) {
             throw new HeadersAlreadySentError(this, name)
         }
@@ -113,6 +114,7 @@ export class Response {
      * @param data
      */
     public setHeaders(data: {[name: string]: string | string[]}): this {
+        this.logging.verbose(`Will set headers on response: ${Object.keys(data).join(', ')}`)
         if ( this.sentHeaders ) {
             throw new HeadersAlreadySentError(this)
         }
@@ -128,12 +130,16 @@ export class Response {
      * @param value
      */
     public appendHeader(name: string, value: string | string[]): this {
+        this.logging.verbose(`Will append header: ${name}`)
+
         if ( this.sentHeaders ) {
             throw new HeadersAlreadySentError(this, name)
         }
+
         if ( !Array.isArray(value) ) {
             value = [value]
         }
+
         let existing = this.headers[name] ?? []
         if ( !Array.isArray(existing) ) {
             existing = [existing]
@@ -152,6 +158,7 @@ export class Response {
      * Write the headers to the client.
      */
     public sendHeaders(): this {
+        this.logging.verbose(`Sending headers...`)
         const headers = {} as any
 
         const setCookieHeaders = this.cookies.getSetCookieHeaders()
@@ -199,6 +206,7 @@ export class Response {
      * @param data
      */
     public async write(data: string | Buffer | Uint8Array | Readable): Promise<void> {
+        this.logging.verbose(`Writing headers & data to response... (destroyed? ${this.serverResponse.destroyed})`)
         return new Promise<void>((res, rej) => {
             if ( this.responseEnded || this.serverResponse.destroyed ) {
                 throw new ErrorWithContext('Tried to write to Response after lifecycle ended.')