Replace ~ only at the beginning of URL path (eg. "~node")

[hwuethrich]

I've noticed that the first ~ character in the request URL path is replaced by a $ character. I assume this exists to support calling actions exposed by the internal $node service (see here), eg. GET /~node/list is calling the action $node.list.

In our case this causes problems because we have a service exposing database records (using moleculer-db) containing a ~ in their ID and use the following alias:

  aliases: {
    'GET contacts/:id': 'contacts.get'
  }

When calling GET /contacts/ABC~123, the params.id is ABC$123 instead of ABC~123.

I've changed the regex to only replace the tilde from the beginning of the path, but I'm not sure if this breaks some other feature I might have missed.

[coveralls]

Pull Request Test Coverage Report for Build 370

• 1 of 1 (100.0%) changed or added relevant line in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 93.804%

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Totals
Change from base Build 369:	0.0%
Covered Lines:	577
Relevant Lines:	592

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💛 - Coveralls

[coveralls]

Pull Request Test Coverage Report for Build 370

• 1 of 1 (100.0%) changed or added relevant line in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 93.804%

---

Totals
Change from base Build 369:	0.0%
Covered Lines:	577
Relevant Lines:	592

---

💛 - Coveralls

[icebob]

Good PR, thanks!