fix: resolve objectStorage and instance cancel API errors (fixes #47)

[zoonderkins]

Summary

This PR fixes the critical bug reported in #47 where the cntb cancel objectStorage command was failing with a panic error.

Problem

When attempting to cancel an object storage using:

cntb cancel objectStorage 4c4bd92c-0654-4848-ab87-3c04ec0e27dd

The command failed with:

panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x2 addr=0x48 pc=0x100bbcf00]

And after fixing the panic, it failed with:

ERROR Error while canceling the object storage: cancelObjectStorageRequest is required and must be specified

Root Causes

This PR addresses three critical issues:

1. Missing API Request Body

Both objectStorage cancel and instance cancel commands were missing the required request body parameter:

• The API requires a CancelObjectStorageRequest or CancelInstanceRequest object
• The commands were calling the API without providing this required parameter
• Fix: Added CancelObjectStorageRequest and CancelInstanceRequest initialization

2. Variable Name Typo

The objectStorage cancel command had a typo in the variable name:

• Variable was named cancelbjectStorageId (missing the letter 'O')
• Fix: Renamed to cancelObjectStorageId in both cancel.go and vars.go

3. Nil Pointer Dereference

The error handler was accessing httpResp.Body without checking if httpResp is nil:

• When API calls fail due to network errors, httpResp can be nil
• Fix: Added nil check before accessing httpResp.Body in handleErrors()

Changes

• cmd/objectStorage/cancel.go: Add request body initialization and fix variable name
• cmd/objectStorage/vars.go: Fix variable name typo
• cmd/instances/cancel.go: Add request body initialization
• cmd/util/handleErrors.go: Add nil pointer check for httpResp

Testing

✅ Tested successfully with:

./cntb cancel objectStorage 4c4bd92c-0654-4848-ab87-3c04ec0e27dd

Result:

TENANTID  CUSTOMERID  OBJECTSTORAGEID                       DISPLAYNAME  CANCELDATE  
  INT       13094617    4c4bd92c-0654-4848-ab87-3c04ec0e27dd  idrive       2025-10-24

✅ Compilation successful with no errors

Impact

• ✅ Fixes objectStorage cancel command (Issue Cannot delete s3 storage #47)
• ✅ Fixes instance cancel command (same issue)
• ✅ Improves error handling for all API commands (nil pointer protection)
• ✅ No breaking changes
• ✅ Backward compatible

Checklist

• Code compiles without errors
• Tested with real API calls
• Fixed all identified issues
• No breaking changes introduced
• Error handling improved

Fixes #47

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Pull Request opened by Augment Code with guidance from the PR author