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add support for single gzip'ed files
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@srirangav
srirangav committed Jul 21, 2021
1 parent 9b1dbd6 commit fa9a6bf
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10 changes: 5 additions & 5 deletions README.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -4,9 +4,9 @@ README
qlZipInfo v1.1.3
By Sriranga Veeraraghavan <[email protected]>

qlZipInfo is a QuickLook generator for zip, jar, tar, tar.gz
(.tgz), tar.bz2 (.tbz2), tar.Z (.tZ), xar (.xar, .pkg), debian
(.deb), 7zip (.7z), xz, cab, and lha archives and ISO9660 images.
qlZipInfo is a QuickLook generator for zip, jar, tar, tar.gz (.tgz),
tar.bz2 (.tbz2), tar.Z (.tZ), xar (.xar, .pkg), debian (.deb),
7zip (.7z), xz, cab, gzip, and lha archives and ISO9660 images.

qlZipInfo relies on libarchive (https://libarchive.org/).

Expand Down Expand Up @@ -39,7 +39,8 @@ History:

v1.1.3 - add support for Microsoft CAB files (Install-
Sheild CAB files have a different format and
aren't yet supported)
aren't yet supported) and gzip'ed archives of
a single file
v1.1.2 - fix (partially?) listing non-ASCII filenames
v1.1.1 - add support for xar / pkg, debian (.deb), 7zip
(.7z), xz, and lha archives and ISO9660 images
Expand Down Expand Up @@ -71,4 +72,3 @@ History:
License:

Please see LICENSE.txt

4 changes: 2 additions & 2 deletions qlZipInfo.xcodeproj/project.pbxproj
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Expand Up @@ -859,7 +859,7 @@
CODE_SIGN_IDENTITY = "Mac Developer";
CODE_SIGN_STYLE = Automatic;
COMBINE_HIDPI_IMAGES = YES;
CURRENT_PROJECT_VERSION = 1;
CURRENT_PROJECT_VERSION = 2;
DEVELOPMENT_TEAM = CLN8R9E6QM;
INFOPLIST_FILE = qlZipInfo/Info.plist;
INSTALL_PATH = /Library/QuickLook;
Expand All @@ -878,7 +878,7 @@
CODE_SIGN_IDENTITY = "Mac Developer";
CODE_SIGN_STYLE = Automatic;
COMBINE_HIDPI_IMAGES = YES;
CURRENT_PROJECT_VERSION = 1;
CURRENT_PROJECT_VERSION = 2;
DEVELOPMENT_TEAM = CLN8R9E6QM;
INFOPLIST_FILE = qlZipInfo/Info.plist;
INSTALL_PATH = /Library/QuickLook;
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162 changes: 129 additions & 33 deletions qlZipInfo/GeneratePreviewForURL.m
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Expand Up @@ -24,6 +24,8 @@
make the header row fixed
v. 0.2.2 (06/20/2021) - add support for rar, rar4, lha, 7z, xz, and
debian (.deb) archives
v. 0.2.3 (07/21/2021) - add support for indiviudal files that are
gzip'ed
Copyright (c) 2015-2021 Sriranga R. Veeraraghavan <[email protected]>
Expand Down Expand Up @@ -55,6 +57,7 @@ a copy of this software and associated documentation files (the
#import <QuickLook/QuickLook.h>
#import <CommonCrypto/CommonDigest.h>

#include <stdio.h>
#include <sys/syslimits.h>
#include <sys/stat.h>
#include <iconv.h>
Expand Down Expand Up @@ -159,6 +162,10 @@ Default error code (MacOS extractErr error code from MacErrors.h) See:
static const char *gFileSizeGigaBytes = "G";
static const char *gFileSizeTeraBytes = "T";

/* UTIs for files that may require special handling */

static const CFStringRef gUTIGZip = CFSTR("org.gnu.gnu-zip-archive");

/* prototypes */

OSStatus GeneratePreviewForURL(void *thisInterface,
Expand Down Expand Up @@ -202,15 +209,19 @@ OSStatus GeneratePreviewForURL(void *thisInterface,
unsigned long i = 0, fileCount = 0;
off_t totalSize = 0;
off_t totalCompressedSize = 0;
off_t fileCompressedSize = 0;
Float64 compression = 0;
bool isFolder = FALSE;
bool isGZFile = false;
fileSizeSpec_t fileSizeSpecInZip;

FILE *gzFile = NULL;
UInt8 gzCompressedSize[4];

if (url == NULL) {
fprintf(stderr, "qlZipInfo: ERROR: url is null\n");
return zipQLFailed;
}

/* get the local file system path for the specified file */

zipFileName =
Expand Down Expand Up @@ -291,19 +302,51 @@ file path using CFStringGetCString() b/c the file path
archive_read_support_format_7zip(a);
archive_read_support_format_cab(a);

if ((r = archive_read_open_filename(a, zipFileNameStr, 10240)))
r = archive_read_open_filename(a, zipFileNameStr, 10240);

if (r != ARCHIVE_OK)
{
fprintf(stderr,
"qlZipInfo: ERROR: %s\n",
archive_error_string(a));

archive_read_close(a);
archive_read_free(a);
return zipQLFailed;

r = zipQLFailed;
}


if (r == zipQLFailed)
{
if (CFEqual(contentTypeUTI,gUTIGZip) != true)
{
return r;
}

/* this is a gzip'ed file, re-try opening in raw mode */

isGZFile = true;
a = archive_read_new();
archive_read_support_format_raw(a);
archive_read_support_filter_gzip(a);

r = archive_read_open_filename(a, zipFileNameStr, 10240);

if (r != ARCHIVE_OK)
{
fprintf(stderr,
"qlZipInfo: ERROR: gz: %s\n",
archive_error_string(a));
archive_read_close(a);
archive_read_free(a);
return zipQLFailed;
}
}

/* exit if the user canceled the preview */

if (QLPreviewRequestIsCancelled(preview)) {
if (QLPreviewRequestIsCancelled(preview))
{
archive_read_close(a);
archive_read_free(a);
return noErr;
Expand Down Expand Up @@ -538,8 +581,15 @@ file path using CFStringGetCString() b/c the file path
fileNameInZip = gFileNameUnavilable;
}

isFolder =
archive_entry_filetype(entry) == AE_IFDIR ? TRUE : FALSE;
if (isGZFile == true)
{
isFolder = FALSE;
}
else
{
isFolder =
(archive_entry_filetype(entry) == AE_IFDIR ? TRUE : FALSE);
}

/* start the table row for this file */

Expand All @@ -556,22 +606,25 @@ file path using CFStringGetCString() b/c the file path
*/

qlEntryIcon = (NSString *)gFileIcon;

if (isFolder == TRUE)
{
qlEntryIcon = (NSString *)gFolderIcon;
}
else if (archive_entry_is_encrypted(entry))
{
qlEntryIcon = (NSString *)gFileEncyrptedIcon;
}
else if (archive_entry_filetype(entry) == AE_IFLNK)
{
qlEntryIcon = (NSString *)gFileLinkIcon;
}
else if (archive_entry_filetype(entry) != AE_IFREG)

if (isGZFile != true)
{
qlEntryIcon = (NSString *)gFileSpecialIcon;
if (isFolder == TRUE)
{
qlEntryIcon = (NSString *)gFolderIcon;
}
else if (archive_entry_is_encrypted(entry))
{
qlEntryIcon = (NSString *)gFileEncyrptedIcon;
}
else if (archive_entry_filetype(entry) == AE_IFLNK)
{
qlEntryIcon = (NSString *)gFileLinkIcon;
}
else if (archive_entry_filetype(entry) != AE_IFREG)
{
qlEntryIcon = (NSString *)gFileSpecialIcon;
}
}

[qlHtml appendFormat: @"<td align=\"center\">%@</td>",
Expand All @@ -597,16 +650,52 @@ file path using CFStringGetCString() b/c the file path
[qlHtml appendString:
@"<td align=\"center\" colspan=\"2\"><pre>--</pre></td>"];
} else {

if (isGZFile == true)
{
/*
if this is a gzip'ed file, assume that the uncompressed
size is stored in the last 4 bytes of the file (which
might be wrong for files greater than 4GB); see:
http://www.abeel.be/content/determine-uncompressed-size-gzip-file
https://stackoverflow.com/questions/9209138/uncompressed-file-size-using-zlibs-gzip-file-access-function
*/

gzFile = fopen(zipFileNameStr, "r");
if (gzFile != NULL)
{
memset(gzCompressedSize, 0, 4);

if (fseek(gzFile, -4, SEEK_END) == 0)
{
if (fread(gzCompressedSize, 1 , 4, gzFile) == 4)
{
fileCompressedSize =
(gzCompressedSize[3] << 24) |
(gzCompressedSize[2] << 16) |
(gzCompressedSize[1] << 8) +
gzCompressedSize[0];
}
}

fclose(gzFile);
}
}
else
{
fileCompressedSize = archive_entry_size(entry);
}

/* clear the file size spec */

memset(&fileSizeSpecInZip, 0, sizeof(fileSizeSpec_t));

/* get the file's size spec */

getFileSizeSpec(archive_entry_size(entry),
getFileSizeSpec(fileCompressedSize,
&fileSizeSpecInZip);

/* print out the file's size in B, K, M, G, or T */

[qlHtml appendFormat:
Expand Down Expand Up @@ -699,21 +788,28 @@ file path using CFStringGetCString() b/c the file path
/* close the row */

[qlHtml appendString:@"</tr>\n"];

/* update the total compressed sizes */

/* update the total compressed and uncompressed sizes */

totalSize += archive_entry_size(entry);
totalSize += fileCompressedSize;

/* if this was a GZip'ed file, no need to repeat the loop */

if (isGZFile == true)
{
break;
}
}

/* close the zip file */

archive_read_close(a);
archive_read_free(a);

/* close the table body */
/* close the main table's body */

[qlHtml appendString: @"</tbody>\n"];

/*
start the summary row for the zip file -
[total size] [blank] [ no. of files]
Expand All @@ -734,7 +830,7 @@ file path using CFStringGetCString() b/c the file path
/* clear the file size spec */

memset(&fileSizeSpecInZip, 0, sizeof(fileSizeSpec_t));

/* get the file's total uncompressed size spec */

getFileSizeSpec(totalSize,
Expand Down Expand Up @@ -767,7 +863,7 @@ file path using CFStringGetCString() b/c the file path

[qlHtml appendString:
@"<td align=\"right\" colspan=\"2\"><pre>&nbsp;</pre></td>"];

/* close the summary row */

[qlHtml appendString:@"</tr>\n"];
Expand Down

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