Add onRequest to steaming requests

[ShuffleReady]

I was able to modify headers in all but the streaming case. This modifies the onRequest hook to be called before fetchEventSource as well.

Requested here as well: #302 (comment)

[phasmax]

Any ETA on this being merged?

[kientv]

@ShuffleReady I already tried, but seem that your PR is not working with streaming request

[ShuffleReady]

How did you try using it?

I'm using it with streaming like so:

const chatBotConfig = {
  chatflowid,
  apiHost,
  onRequest: async (request) => {
    // This gets called for all requests including streaming ones
    request.credentials = 'include';
  },
  ...

I made the changes because changing the request headers or credentials only worked with non-streaming requests.

[kientv]

How did you try using it?

I'm using it with streaming like so:

const chatBotConfig = {
  chatflowid,
  apiHost,
  onRequest: async (request) => {
    // This gets called for all requests including streaming ones
    request.credentials = 'include';
  },
  ...

I made the changes because changing the request headers or credentials only worked with non-streaming requests.
@ShuffleReady
Yes, but it's not trigger onRequest hook in streaming query
and your solution is not same as ＠Casper Jensen, what's include?

Do you support fetchResponseFromEventStream?