fixes #20

[rlerdorf]

Fix Content-ID parsing stripping parenthesized text (GH-20)

Fixes #20

Problem

mailparse_msg_get_part_data() returns the wrong content-id value when the Content-ID header contains parentheses. For example:

Content-ID: <Facebook_32x32(1)_aa284ba9-f148-4698-9c1f-c8e92bdb842e.png>

Returns Facebook_32x32 _aa284ba9-f148-4698-9c1f-c8e92bdb842e.png instead of the correct Facebook_32x32(1)_aa284ba9-f148-4698-9c1f-c8e92bdb842e.png.

The code was passing the Content-ID value through the RFC 822 address tokenizer (php_mailparse_rfc822_tokenize + php_rfc822_parse_address_tokens), which interprets parenthesized text as RFC 822 comments and strips them. Content-ID is a message identifier, not an email address, so full address parsing is inappropriate here.

Fix

Replace the RFC 822 address parser with simple whitespace trimming and angle bracket stripping. This preserves the existing behavior for standard RFC-compliant Content-IDs like <part1@example.com> (angle brackets removed, inner value returned) while fixing the bug for values containing parentheses.

[Copilot]

Pull request overview

Fixes incorrect Content-ID extraction in mailparse_msg_get_part_data() when the header value contains parentheses by avoiding RFC 822 address parsing (which treats parenthesized text as comments).

Changes:

• Replace RFC 822 address-token parsing for Content-ID with direct trimming + bracket stripping in mailparse.c.
• Add a new PHPT regression test covering parenthesized Content-ID values and bracketed/unbracketed forms.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 3 comments.

File	Description
mailparse.c	Updates Content-ID extraction logic to preserve parenthesized text by no longer using the RFC 822 address parser.
tests/gh20.phpt	Adds regression coverage for GH-20 to ensure parentheses in Content-ID are preserved.

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[Copilot]

Pull request overview

Copilot reviewed 2 out of 2 changed files in this pull request and generated 3 comments.

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[Copilot]

Pull request overview

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

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[Copilot]

Pull request overview

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

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