Hi, Android restrictions on public storage block direct file paths.

I assume you already have a file deor where you want to save the zip stream<

Open zip file using file descriptor or stream about zip HOT 6 CLOSED

bruenor41 commented on June 10, 2024

Open zip file using file descriptor or stream

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Comments (6)

kuba-- commented on June 10, 2024

It will require many small changes in minizip, so if your files are not super big you can read them into memory and use zip_stream_... API

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bruenor41 commented on June 10, 2024

Thank you for fast response. Before zip process I do save state of various components, i save variables and arrays using stream to around 20 small files (from 1 to 20MB). Resulted files are zipped together. Maybe I can write them into memory stream, instead file stream first.

…

On Thu, Mar 16, 2023, 18:32 Kuba Podgórski ***@***.***> wrote: It will require many small changes in minizip, so if your files are not *super big* you can read them into memory and use zip_stream_... API — Reply to this email directly, view it on GitHub <https://github.com/kuba--/zip/issues/291#issuecomment-1472409446>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AGIJKLK6R2LG7ZROSM5WZGLW4NFBZANCNFSM6AAAAAAV5J7O3Y> . You are receiving this because you authored the thread.Message ID: ***@***.***>

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kuba-- commented on June 10, 2024

Yeah, definitivelly ( it does not sound like a big archive). You can do sth. like:
https://github.com/kuba--/zip/blob/master/test/test_entry.c#L176

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bruenor41 commented on June 10, 2024

Thanks for code. If I understand it well, it creates memory stream and save there one file test1-txt. Then you copy buffer. And you extract it. But at the end after zip I need save the memory to providing FILE* stream. So I can take copied bufencode1 and save it file. Right?

…

On Sat, Mar 18, 2023, 13:39 Kuba Podgórski ***@***.***> wrote: Yeah, definitivelly ( it does not sound like a big archive). You can do sth. like: https://github.com/kuba--/zip/blob/master/test/test_entry.c#L176 — Reply to this email directly, view it on GitHub <https://github.com/kuba--/zip/issues/291#issuecomment-1474840063>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AGIJKLNJFLVDZVYO5JD54TLW4WUH3ANCNFSM6AAAAAAV5J7O3Y> . You are receiving this because you authored the thread.Message ID: ***@***.***>

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kuba-- commented on June 10, 2024

I assume you already have a file descriptor where you want to save the zip stream.
Then:

        // create zip stream in memory
	struct zip_t *zip = zip_stream_open(NULL, 0, ZIP_DEFAULT_COMPRESSION_LEVEL, 'w');

        // write some data
	zip_entry_open(zip, "entry1.txt");
	const char *txt = "This is content for entry1.txt\0";
	zip_entry_write(zip, txt, strlen(txt));
	zip_entry_close(zip);

        // get zip stream into the buffer
	void *buf = NULL;
	size_t bufsize = 0;
	zip_stream_copy(zip, (void **)&buf, &bufsize);

	zip_stream_close(zip);

        // we should already have a file descriptor
	int fd = open("/tmp/file.zip", O_CREAT|O_WRONLY|O_TRUNC, S_IRUSR | S_IWUSR);
        // write zip stream to your file descriptor
	write(fd, buf, bufsize);
	close(fd);

        // remember to free memory allocated for the buffer!
	free(buf);

$ zipinfo /tmp/file.zip

Archive:  /tmp/file.zip
Zip file size: 179 bytes, number of entries: 1
-rw----     0.0 fat       30 bX defN 23-Mar-19 13:36 entry1.txt
1 file, 30 bytes uncompressed, 29 bytes compressed:  3.3%


$ unzip /tmp/file.zip 
$ cat entry1.txt 
This is content for entry1.txt%

Keep in mind - there is no error checking in above example.

Good luck!

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bruenor41 commented on June 10, 2024

Perfect, that's exactly what I need:) Many thanks for your help and awesome library.

…

On Sun, Mar 19, 2023, 13:42 Kuba Podgórski ***@***.***> wrote: I assume you already have a file descriptor where you want to save the *zip stream*. Then: // create zip stream in memory struct zip_t *zip = zip_stream_open(NULL, 0, ZIP_DEFAULT_COMPRESSION_LEVEL, 'w'); // write some data zip_entry_open(zip, "entry1.txt"); const char *txt = "This is content for entry1.txt\0"; zip_entry_write(zip, txt, strlen(txt)); zip_entry_close(zip); // get zip stream into the buffer char *buf = NULL; size_t bufsize = 0; zip_stream_copy(zip, (void **)&buf, &bufsize); zip_stream_close(zip); // we should already have a file descriptor int fd = open("/tmp/file.zip", O_CREAT|O_WRONLY|O_TRUNC, S_IRUSR | S_IWUSR); // write zip stream to your file descriptor write(fd, buf, bufsize); close(fd); // remember to free memory allocated for the buffer! free(buf); Keep in mind - there is no error checking in above example. Good luck! — Reply to this email directly, view it on GitHub <https://github.com/kuba--/zip/issues/291#issuecomment-1475242457>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AGIJKLNN2GQAXXNSMHZHDYLW435J7ANCNFSM6AAAAAAV5J7O3Y> . You are receiving this because you authored the thread.Message ID: ***@***.***>

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Open zip file using file descriptor or stream about zip HOT 6 CLOSED

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