[Epic][core-http] Planned improvements / redesigns

[xirzec]

@azure/core-http 2.0

Refactoring

• New pipeline design [core-http] New Pipeline Design RFC #8461
  • Remove the need for RequestPolicyOptions [core-http] Should we still use RequestPolicyOptions? #7048
  • Remove old logging facilities in core-http, default to logger [core-http] Migrate core-http logging to @azure/logger #8614
• Split out mappers and service client into separate autorest package [core-http] Separate out autorest client and mappers into separate package #8615
• Move from RequestOptionsBase to OperationOptions [core-http] sendOperationRequest needs an overload that takes OperationOptions #6457
• Remove XML dependency into own package [core-http] Make XML parse/deserialization a separate optional package #8616
• Separate Serialization/Deserialization from mapping [core-http] Separate serialization/deserialization from mapping #8617
• Audit existing surface while adding to new package
• Make sure all parameters are interfaces
• Minor refactors [core-http] Minor refactoring for the next major version #8618
  • Remove stripRequest/stripResponse
  • Remove allowedHeaderNames and allowedQueryParameters
  • Cleanup HttpHeaders and WebResource, get rid of unnecessary members
  • Make WebResource constructor not take so many params
  • Trim publics out of every policy
  • Remove rpRegistrationPolicy

Larger work items

• Update node-fetch to version 3.x OR replace node-fetch with http This package depends on [email protected] which doesn't play well with WebPack #8483
• Consider switching from tunnel to another proxy agent library [core-http] Consider switching from tunnel to another proxy agent library #6773
• Document creating custom HttpClients / expose lower-level agents. Ex: logging httpclient Documentation for custom HttpClient usage #6485
• Consider exposing node-fetch client options [core-http] Expose NodeFetchHttpClient and fetch options #4918
• Move cosmosdb over to core-http [cosmosdb] Move to use core-http #6151
• Move away from custom URL implementation [core-http] Remove custom URL implementation #8620

Minor fixes and improvements in v2

• Unify retry policies between core and appconfig [core] Unify the ThrottlingRetryPolicy in core and app-configuration #6484
• Create pipeline from options needs a way to skip retry [core][core-http] createPipelineFromOptions needs a way to skip retry policies #5804
• Merge retry policy logic / attempt tracking [core-https] Merge retry policies / unify retry attempt counts? #9569
• Remove keepAlivePolicy [core-https] Remove keepAlivePolicy? #9587
• Move decompression into optional policy [core-https] Move decompression into optional policy #9588

Minor fixes and improvements in v1

• systemErrorRetryPolicy doesn't do anything [core-http] systemErrorRetryPolicy doesn't do anything #8459
• add per-operation timeout Investigate options for default per-operation timeout #7484
• fix rollup replace config Rollup: replace config is wrong #7243
• Fix browser tests [core-http][test] browser test failures for Edge and Firefox #6731
• Update user-agent header field [core-http] We should use the the x-ms-useragent field rather than the x-ms-command-name field #6530
• Avoid using global fetch Electron app error: Failed to execute 'fetch' on 'Window': member signal is not of type AbortSignal.  #5143
• Improvements to exponential retry policy [core-http] Delay for first retry in exponential retry policy should be after the configured min value #4201
• Remove mocha.opts [core-http] Update test scripts for consistency #7933

[xirzec]

Since Corev2 is GA, I'm going to close this Epic. The remaining open issues will speak for themselves.