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Preview of ZIP - Spanning Signature Marker
zip
539 B
Actual file preview for ZIP - Spanning Signature Marker

ZIP - Spanning Signature Marker

A complete ZIP prefixed with the 0x08074B50 spanning signature. That value is also the data descriptor signature, so a reader scanning the byte stream for descriptors finds one before the first local header — a genuine ambiguity in the format, reproduced here in a file that is otherwise entirely ordinary.

File
ZIP · Zip Spanned · 2 members
Use case
Conversion testingError handling· Conversion set
Preview of ZIP - Symlink Member
zip
663 B
Actual file preview for ZIP - Symlink Member

ZIP - Symlink Member

share/current.csv is a symbolic link, stored the Info-ZIP way: the external attributes carry S_IFLNK and the member payload is the 16-byte target path rather than file content. The target is relative and resolves inside the archive, so extracting without symlink support produces a harmless text file instead of a dangling or escaping link.

File
ZIP · Zip Metadata · 3 members
Use case
Conversion testingMetadata testing· Conversion set
Preview of ZIP - Unicode Filenames
zip
875 B
Actual file preview for ZIP - Unicode Filenames

ZIP - Unicode Filenames

A ZIP archive — UTF-8 filenames: accents, Japanese, emoji. Deterministic (fixed member timestamps) and safe to extract anywhere.

File
ZIP · Zip · 5 members
Preview of ZIP - Unix Permission Bits in External Attributes
zip
552 B
Actual file preview for ZIP - Unix Permission Bits in External Attributes

ZIP - Unix Permission Bits in External Attributes

Unix permissions ride in the top 16 bits of the ZIP external attributes field, and are only meaningful when the version-made-by byte says Unix. This archive carries 0444, 0600, 0664 and a 0750 directory, plus the MS-DOS read-only bit on the 0444 member so the two conventions can be seen disagreeing. Nothing here is marked executable.

File
ZIP · Zip Metadata · 4 members
Use case
Conversion testingMetadata testing· Conversion set
Preview of ZIP - Unknown Extra Field ID
zip
617 B
Actual file preview for ZIP - Unknown Extra Field ID

ZIP - Unknown Extra Field ID

An extra field with header ID 0x9901, which is assigned to nothing, sits alongside a recognised extended-timestamp field in a different order in each header. The extra-field area is a length-prefixed chain, so the only correct behaviour is to skip unknown IDs by their declared length and keep walking.

File
ZIP · Zip Metadata · 2 members
Use case
Conversion testingError handling+1· Conversion set
Preview of ZIP - UTF-8 Name Flag Set
zip
621 B
Actual file preview for ZIP - UTF-8 Name Flag Set

ZIP - UTF-8 Name Flag Set

Member names stored as UTF-8 with general-purpose bit 11 (the language-encoding flag) set, which is the modern, unambiguous way to carry a non-ASCII filename in a ZIP. Its CP437 twin encodes the same archive the legacy way, so a reader's encoding heuristic can be compared against a case where the answer is declared.

File
ZIP · Zip Encoding · 3 members
Use case
Conversion testingEncoding detection· Paired fixture
Preview of ZIP - Zero-Length Members
zip
699 B
Actual file preview for ZIP - Zero-Length Members

ZIP - Zero-Length Members

Three empty files stored three ways - stored, deflated, and deflated behind a data descriptor - beside one real member. An empty deflate stream is still two bytes on disk with CRC 0, so readers that treat compressed size 0 as 'no data' and readers that treat CRC 0 as 'not computed' both go wrong here.

File
ZIP · Zip Payload · 4 members
Use case
Conversion testingError handling· Conversion set
Preview of ZIP - ZIP64 End of Central Directory Only
zip
587 B
Actual file preview for ZIP - ZIP64 End of Central Directory Only

ZIP - ZIP64 End of Central Directory Only

Ordinary 32-bit member records terminated by a ZIP64 end-of-central-directory record, its locator, and then a normal 32-bit end record — the belt-and-braces trailer some writers always emit. A reader must find the classic end record first, notice the locator in front of it, and reconcile two directories that agree.

File
ZIP · Zip64 · 2 members
Use case
Conversion testingError handling· Conversion set
Preview of ZIP - ZIP64 in Local and Central Headers
zip
667 B
Actual file preview for ZIP - ZIP64 in Local and Central Headers

ZIP - ZIP64 in Local and Central Headers

Both the local file headers and the central directory carry a ZIP64 extended information extra field (0x0001), with the 32-bit size fields set to 0xFFFFFFFF as the spec requires. The payload is a few hundred bytes: ZIP64 is present because the writer could not seek, not because the data is large, which is precisely the case size-based heuristics miss.

File
ZIP · Zip64 · 2 members
Use case
Conversion testingError handling· Conversion set
Preview of ZIP - ZIP64 in the Central Directory Only
zip
627 B
Actual file preview for ZIP - ZIP64 in the Central Directory Only

ZIP - ZIP64 in the Central Directory Only

The local headers are plain 32-bit while the central directory carries the ZIP64 extra field. This is legal and common: a writer that streams cannot know at local-header time whether it will need ZIP64, so it commits to the wide fields only when it writes the directory.

File
ZIP · Zip64 · 2 members
Use case
Conversion testingError handling· Conversion set
Preview of ZIP - ZIP64 Relative Offset Field
zip
643 B
Actual file preview for ZIP - ZIP64 Relative Offset Field

ZIP - ZIP64 Relative Offset Field

A central directory whose ZIP64 extra field carries the relative local-header offset as well as the sizes. The ZIP64 extra is variable length and its members appear in a fixed order, so a reader that assumes a 16-byte or 24-byte block reads the offset out of the wrong slot.

File
ZIP · Zip64 · 2 members
Use case
Conversion testingError handling· Conversion set
Preview of ZIP — Config Bundle SAMPLE
zip
229 B
Actual file preview for ZIP — Config Bundle SAMPLE

ZIP — Config Bundle SAMPLE

Small ZIP SAMPLE (config-bundle.zip) for extractor and listing tests.

File
ZIP · Bundles · 2 members
Preview of ZIP — Data Bundle SAMPLE
zip
331 B
Actual file preview for ZIP — Data Bundle SAMPLE

ZIP — Data Bundle SAMPLE

Small ZIP SAMPLE (data-bundle.zip) for extractor and listing tests.

File
ZIP · Bundles · 3 members
Preview of ZIP — Docs Bundle SAMPLE
zip
230 B
Actual file preview for ZIP — Docs Bundle SAMPLE

ZIP — Docs Bundle SAMPLE

Small ZIP SAMPLE (docs-bundle.zip) for extractor and listing tests.

File
ZIP · Bundles · 2 members
Preview of ZIP — Empty Dirs SAMPLE
zip
232 B
Actual file preview for ZIP — Empty Dirs SAMPLE

ZIP — Empty Dirs SAMPLE

Small ZIP SAMPLE (empty-dirs.zip) for extractor and listing tests.

File
ZIP · Bundles · 2 members