Feature/pre request script

[nickpalenchar]

fixes #218

scrapped the old branch feature/dynamic-headers after merge woes (will delete soon).

Lots more to think about, but I feel it satisfies mvp (and would love to get this in master so I can take a break from keeping it up-to-date manually 😅)

Request section has a code button. When clicked, it enables pre-request scripts. A pre-request script section appears above where javascript can be entered.

pre-request script has access to a postwoman api object (pw) that can be interacted with. Right now the only thing to do is pw.environment.set("key", "value") to set a variable that can be used in areas of the request. Note this is native javascript, so any js method can be used. Final values are all treated as strings.

Test by setting something in the pre-request script pw.environment.set("route", "/api/users"); and replacing parts of the request within double angle brackets (path = <<route>>). Response should function the same as if the final value was statically typed.

Additionally, requests made this way end up in history with the same code icon. Hovering over it informs the user that this entry in the history used pre-request scripts. Due to it's highly dynamic potential, you could say that note serves as a warning!

tangentially -- @NBTX can you make the request-chaining into its own issue? I realized it's quite separate from this one so it would be good to address that after this.

[ghost]

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[TravisBuddy]

Hey @nickpalenchar,
Your changes look good to me!

View build log

TravisBuddy Request Identifier: 44aad4c0-fabd-11e9-94bd-fbbf6873bcfd

[liyasthomas]

Works good!
I like the indicator in the history section 👍

#todo - after merging to master, I want this to be in production ASAP for more beta testing

• Toggling pre-script section off will remove already binded properties.
• useHistory() on history entries with pre-scripts will retain those pre-scripts. We prolly need to store pre-scripts too to history.

[liyasthomas]

👌

[nickpalenchar]

Agreed on the post-merge todos! Additionally, we could also indicate this feature is not fully stable as-is. Something as simple as changing the header to Pre-Request Script (experimental) should be all that’s needed to sufficiently warn users.

[TravisBuddy]

Hey @nickpalenchar,
Your changes look good to me!

View build log

TravisBuddy Request Identifier: 2c05fc60-fac2-11e9-94bd-fbbf6873bcfd