#define DSIZ CURL_MAX_WRITE_SIZE /* buffer size for decompressed data */
-
#ifdef HAVE_LIBZ
-/* Comment this out if zlib is always going to be at least ver. 1.2.0.4
- (doing so will reduce code size slightly). */
-#define OLD_ZLIB_SUPPORT 1
-
-#define GZIP_MAGIC_0 0x1f
-#define GZIP_MAGIC_1 0x8b
-
-/* gzip flag byte */
-#define CURL_GZIPFLAG_ASCII 0x01 /* bit 0 set: file probably ASCII
- text */
-#define CURL_GZIPFLAG_HEAD_CRC 0x02 /* bit 1 set: header CRC present */
-#define CURL_GZIPFLAG_EXTRA_FIELD 0x04 /* bit 2 set: extra field present */
-#define CURL_GZIPFLAG_ORIG_NAME 0x08 /* bit 3 set: original filename
- present */
-#define CURL_GZIPFLAG_COMMENT 0x10 /* bit 4 set: file comment present */
-#define CURL_GZIPFLAG_RESERVED 0xE0 /* bits 5..7: reserved */
-
typedef enum {
ZLIB_UNINIT, /* uninitialized */
ZLIB_INIT, /* initialized */
ZLIB_INFLATING, /* inflating started. */
ZLIB_EXTERNAL_TRAILER, /* reading external trailer */
- ZLIB_GZIP_HEADER, /* reading gzip header */
- ZLIB_GZIP_INFLATING, /* inflating gzip stream */
ZLIB_INIT_GZIP /* initialized in transparent gzip mode */
} zlibInitState;
exit_zlib(struct Curl_easy *data,
z_stream *z, zlibInitState *zlib_init, CURLcode result)
{
- if(*zlib_init == ZLIB_GZIP_HEADER)
- Curl_safefree(z->next_in);
-
if(*zlib_init != ZLIB_UNINIT) {
if(inflateEnd(z) != Z_OK && result == CURLE_OK)
result = process_zlib_error(data, z);
/* Check state. */
if(zp->zlib_init != ZLIB_INIT &&
zp->zlib_init != ZLIB_INFLATING &&
- zp->zlib_init != ZLIB_INIT_GZIP &&
- zp->zlib_init != ZLIB_GZIP_INFLATING)
+ zp->zlib_init != ZLIB_INIT_GZIP)
return exit_zlib(data, z, &zp->zlib_init, CURLE_WRITE_ERROR);
/* Dynamically allocate a buffer for decompression because it is uncommonly
/* Deflate handler. */
static CURLcode deflate_do_init(struct Curl_easy *data,
- struct Curl_cwriter *writer)
+ struct Curl_cwriter *writer)
{
struct zlib_writer *zp = (struct zlib_writer *) writer;
z_stream *z = &zp->z; /* zlib state structure */
}
static CURLcode deflate_do_write(struct Curl_easy *data,
- struct Curl_cwriter *writer, int type,
- const char *buf, size_t nbytes)
+ struct Curl_cwriter *writer, int type,
+ const char *buf, size_t nbytes)
{
struct zlib_writer *zp = (struct zlib_writer *) writer;
z_stream *z = &zp->z; /* zlib state structure */
}
static void deflate_do_close(struct Curl_easy *data,
- struct Curl_cwriter *writer)
+ struct Curl_cwriter *writer)
{
struct zlib_writer *zp = (struct zlib_writer *) writer;
z_stream *z = &zp->z; /* zlib state structure */
/* Gzip handler. */
static CURLcode gzip_do_init(struct Curl_easy *data,
- struct Curl_cwriter *writer)
+ struct Curl_cwriter *writer)
{
struct zlib_writer *zp = (struct zlib_writer *) writer;
z_stream *z = &zp->z; /* zlib state structure */
+ const char *v = zlibVersion();
/* Initialize zlib */
z->zalloc = (alloc_func) zalloc_cb;
z->zfree = (free_func) zfree_cb;
- if(strcmp(zlibVersion(), "1.2.0.4") >= 0) {
- /* zlib ver. >= 1.2.0.4 supports transparent gzip decompressing */
+ if(strcmp(v, "1.2.0.4") >= 0) {
+ /* zlib version >= 1.2.0.4 supports transparent gzip decompressing */
if(inflateInit2(z, MAX_WBITS + 32) != Z_OK) {
return process_zlib_error(data, z);
}
zp->zlib_init = ZLIB_INIT_GZIP; /* Transparent gzip decompress state */
}
else {
- /* we must parse the gzip header and trailer ourselves */
- if(inflateInit2(z, -MAX_WBITS) != Z_OK) {
- return process_zlib_error(data, z);
- }
- zp->trailerlen = 8; /* A CRC-32 and a 32-bit input size (RFC 1952, 2.2) */
- zp->zlib_init = ZLIB_INIT; /* Initial call state */
+ failf(data, "too old zlib version: %s", v);
+ return CURLE_FAILED_INIT;
}
return CURLE_OK;
}
-#ifdef OLD_ZLIB_SUPPORT
-/* Skip over the gzip header */
-typedef enum {
- GZIP_OK,
- GZIP_BAD,
- GZIP_UNDERFLOW
-} gzip_status;
-
-static gzip_status check_gzip_header(unsigned char const *data, ssize_t len,
- ssize_t *headerlen)
-{
- int method, flags;
- const ssize_t totallen = len;
-
- /* The shortest header is 10 bytes */
- if(len < 10)
- return GZIP_UNDERFLOW;
-
- if((data[0] != GZIP_MAGIC_0) || (data[1] != GZIP_MAGIC_1))
- return GZIP_BAD;
-
- method = data[2];
- flags = data[3];
-
- if(method != Z_DEFLATED || (flags & CURL_GZIPFLAG_RESERVED) != 0) {
- /* cannot handle this compression method or unknown flag */
- return GZIP_BAD;
- }
-
- /* Skip over time, xflags, OS code and all previous bytes */
- len -= 10;
- data += 10;
-
- if(flags & CURL_GZIPFLAG_EXTRA_FIELD) {
- ssize_t extra_len;
-
- if(len < 2)
- return GZIP_UNDERFLOW;
-
- extra_len = (data[1] << 8) | data[0];
-
- if(len < (extra_len + 2))
- return GZIP_UNDERFLOW;
-
- len -= (extra_len + 2);
- data += (extra_len + 2);
- }
-
- if(flags & CURL_GZIPFLAG_ORIG_NAME) {
- /* Skip over NUL-terminated filename */
- while(len && *data) {
- --len;
- ++data;
- }
- if(!len || *data)
- return GZIP_UNDERFLOW;
-
- /* Skip over the NUL */
- --len;
- ++data;
- }
-
- if(flags & CURL_GZIPFLAG_COMMENT) {
- /* Skip over NUL-terminated comment */
- while(len && *data) {
- --len;
- ++data;
- }
- if(!len || *data)
- return GZIP_UNDERFLOW;
-
- /* Skip over the NUL */
- --len;
- }
-
- if(flags & CURL_GZIPFLAG_HEAD_CRC) {
- if(len < 2)
- return GZIP_UNDERFLOW;
-
- len -= 2;
- }
-
- *headerlen = totallen - len;
- return GZIP_OK;
-}
-#endif
-
static CURLcode gzip_do_write(struct Curl_easy *data,
- struct Curl_cwriter *writer, int type,
- const char *buf, size_t nbytes)
+ struct Curl_cwriter *writer, int type,
+ const char *buf, size_t nbytes)
{
struct zlib_writer *zp = (struct zlib_writer *) writer;
z_stream *z = &zp->z; /* zlib state structure */
return inflate_stream(data, writer, type, ZLIB_INIT_GZIP);
}
-#ifndef OLD_ZLIB_SUPPORT
- /* Support for old zlib versions is compiled away and we are running with
- an old version, so return an error. */
+ /* We are running with an old version: return error. */
return exit_zlib(data, z, &zp->zlib_init, CURLE_WRITE_ERROR);
-
-#else
- /* This next mess is to get around the potential case where there is not
- * enough data passed in to skip over the gzip header. If that happens, we
- * malloc a block and copy what we have then wait for the next call. If
- * there still is not enough (this is definitely a worst-case scenario), we
- * make the block bigger, copy the next part in and keep waiting.
- *
- * This is only required with zlib versions < 1.2.0.4 as newer versions
- * can handle the gzip header themselves.
- */
-
- switch(zp->zlib_init) {
- /* Skip over gzip header? */
- case ZLIB_INIT:
- {
- /* Initial call state */
- ssize_t hlen;
-
- switch(check_gzip_header((unsigned char *) buf, nbytes, &hlen)) {
- case GZIP_OK:
- z->next_in = (Bytef *) buf + hlen;
- z->avail_in = (uInt) (nbytes - hlen);
- zp->zlib_init = ZLIB_GZIP_INFLATING; /* Inflating stream state */
- break;
-
- case GZIP_UNDERFLOW:
- /* We need more data so we can find the end of the gzip header. it is
- * possible that the memory block we malloc here will never be freed if
- * the transfer abruptly aborts after this point. Since it is unlikely
- * that circumstances will be right for this code path to be followed in
- * the first place, and it is even more unlikely for a transfer to fail
- * immediately afterwards, it should seldom be a problem.
- */
- z->avail_in = (uInt) nbytes;
- z->next_in = malloc(z->avail_in);
- if(!z->next_in) {
- return exit_zlib(data, z, &zp->zlib_init, CURLE_OUT_OF_MEMORY);
- }
- memcpy(z->next_in, buf, z->avail_in);
- zp->zlib_init = ZLIB_GZIP_HEADER; /* Need more gzip header data state */
- /* We do not have any data to inflate yet */
- return CURLE_OK;
-
- case GZIP_BAD:
- default:
- return exit_zlib(data, z, &zp->zlib_init, process_zlib_error(data, z));
- }
-
- }
- break;
-
- case ZLIB_GZIP_HEADER:
- {
- /* Need more gzip header data state */
- ssize_t hlen;
- z->avail_in += (uInt) nbytes;
- z->next_in = Curl_saferealloc(z->next_in, z->avail_in);
- if(!z->next_in) {
- return exit_zlib(data, z, &zp->zlib_init, CURLE_OUT_OF_MEMORY);
- }
- /* Append the new block of data to the previous one */
- memcpy(z->next_in + z->avail_in - nbytes, buf, nbytes);
-
- switch(check_gzip_header(z->next_in, (ssize_t)z->avail_in, &hlen)) {
- case GZIP_OK:
- /* This is the zlib stream data */
- free(z->next_in);
- /* Do not point into the malloced block since we just freed it */
- z->next_in = (Bytef *) buf + hlen + nbytes - z->avail_in;
- z->avail_in = z->avail_in - (uInt)hlen;
- zp->zlib_init = ZLIB_GZIP_INFLATING; /* Inflating stream state */
- break;
-
- case GZIP_UNDERFLOW:
- /* We still do not have any data to inflate! */
- return CURLE_OK;
-
- case GZIP_BAD:
- default:
- return exit_zlib(data, z, &zp->zlib_init, process_zlib_error(data, z));
- }
-
- }
- break;
-
- case ZLIB_EXTERNAL_TRAILER:
- z->next_in = (Bytef *) buf;
- z->avail_in = (uInt) nbytes;
- return process_trailer(data, zp);
-
- case ZLIB_GZIP_INFLATING:
- default:
- /* Inflating stream state */
- z->next_in = (Bytef *) buf;
- z->avail_in = (uInt) nbytes;
- break;
- }
-
- if(z->avail_in == 0) {
- /* We do not have any data to inflate; wait until next time */
- return CURLE_OK;
- }
-
- /* We have parsed the header, now uncompress the data */
- return inflate_stream(data, writer, type, ZLIB_GZIP_INFLATING);
-#endif
}
static void gzip_do_close(struct Curl_easy *data,
#endif /* HAVE_LIBZ */
-
#ifdef HAVE_BROTLI
/* Brotli writer. */
struct brotli_writer {
}
static CURLcode brotli_do_init(struct Curl_easy *data,
- struct Curl_cwriter *writer)
+ struct Curl_cwriter *writer)
{
struct brotli_writer *bp = (struct brotli_writer *) writer;
(void) data;
}
static CURLcode brotli_do_write(struct Curl_easy *data,
- struct Curl_cwriter *writer, int type,
- const char *buf, size_t nbytes)
+ struct Curl_cwriter *writer, int type,
+ const char *buf, size_t nbytes)
{
struct brotli_writer *bp = (struct brotli_writer *) writer;
const uint8_t *src = (const uint8_t *) buf;
};
#endif
-
#ifdef HAVE_ZSTD
/* Zstd writer. */
struct zstd_writer {
#endif
static CURLcode zstd_do_init(struct Curl_easy *data,
- struct Curl_cwriter *writer)
+ struct Curl_cwriter *writer)
{
struct zstd_writer *zp = (struct zstd_writer *) writer;
}
static CURLcode zstd_do_write(struct Curl_easy *data,
- struct Curl_cwriter *writer, int type,
- const char *buf, size_t nbytes)
+ struct Curl_cwriter *writer, int type,
+ const char *buf, size_t nbytes)
{
CURLcode result = CURLE_OK;
struct zstd_writer *zp = (struct zstd_writer *) writer;
}
if(out.pos > 0) {
result = Curl_cwriter_write(data, writer->next, type,
- zp->decomp, out.pos);
+ zp->decomp, out.pos);
if(result)
break;
}
};
#endif
-
/* Identity handler. */
static const struct Curl_cwtype identity_encoding = {
"identity",
sizeof(struct Curl_cwriter)
};
-
/* supported general content decoders. */
static const struct Curl_cwtype * const general_unencoders[] = {
&identity_encoding,
/* Deferred error dummy writer. */
static CURLcode error_do_init(struct Curl_easy *data,
- struct Curl_cwriter *writer)
+ struct Curl_cwriter *writer)
{
(void)data;
(void)writer;
}
static CURLcode error_do_write(struct Curl_easy *data,
- struct Curl_cwriter *writer, int type,
- const char *buf, size_t nbytes)
+ struct Curl_cwriter *writer, int type,
+ const char *buf, size_t nbytes)
{
(void) writer;
(void) buf;
strcpy(buf, CONTENT_ENCODING_DEFAULT);
}
-
#endif /* CURL_DISABLE_HTTP */
projects / thirdparty / curl.git / commitdiff
