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#include "links.h"
unsigned long decompressed_cache_size;
static int display_error(struct terminal *term, unsigned char *msg, int *errp)
{
struct window *win;
if (errp) *errp = 1;
if (!term) return 0;
if (!errp) foreach(win, term->windows) if (win->handler == dialog_func) {
struct dialog_data *d = win->data;
if (d->dlg->title == msg) {
return 0;
}
}
return 1;
}
#ifdef HAVE_ANY_COMPRESSION
static void decoder_memory_init(unsigned char **p, size_t *size, off_t init_length)
{
if (init_length > 0 && init_length < MAXINT) *size = (int)init_length;
else *size = 4096;
*p = mem_alloc(*size);
}
static int decoder_memory_expand(unsigned char **p, size_t size, size_t *addsize)
{
unsigned char *pp;
size_t add = size / 4 + 1;
if (size + add < size) {
if (add > 1) add >>= 1;
else overalloc();
}
pp = mem_realloc_mayfail(*p, size + add);
if (!pp) {
*addsize = 0;
return -1;
}
*addsize = add;
*p = pp;
return 0;
}
static void decompress_error(struct terminal *term, struct cache_entry *ce, unsigned char *lib, unsigned char *msg, int *errp)
{
unsigned char *u, *uu, *server;
if ((u = parse_http_header(ce->head, cast_uchar "Content-Encoding", NULL))) {
mem_free(u);
if ((server = get_host_name(ce->url))) {
add_blacklist_entry(server, BL_NO_COMPRESSION);
mem_free(server);
}
}
if (!display_error(term, TEXT_(T_DECOMPRESSION_ERROR), errp)) return;
u = stracpy(ce->url);
if ((uu = cast_uchar strchr(cast_const_char u, POST_CHAR))) *uu = 0;
msg_box(term, getml(u, NULL), TEXT_(T_DECOMPRESSION_ERROR), AL_CENTER | AL_EXTD_TEXT, TEXT_(T_ERROR_DECOMPRESSING_), u, TEXT_(T__wITH_), lib, cast_uchar ": ", msg, NULL, NULL, 1, TEXT_(T_CANCEL), NULL, B_ENTER | B_ESC);
}
#endif
#ifdef HAVE_ZLIB
#include <zlib.h>
static int decode_gzip(struct terminal *term, struct cache_entry *ce, unsigned char **p_start, size_t *p_len, int defl, int *errp)
{
unsigned char err;
unsigned char memory_error;
unsigned char skip_gzip_header;
unsigned char old_zlib;
z_stream z;
off_t offset;
size_t header;
int r;
unsigned char *p;
struct fragment *f;
size_t size;
retry_after_memory_error:
memory_error = 0;
header = 0;
decoder_memory_init(&p, &size, ce->length);
init_again:
err = 0;
skip_gzip_header = 0;
old_zlib = 0;
memset(&z, 0, sizeof z);
z.next_in = NULL;
z.avail_in = 0;
z.next_out = p;
z.avail_out = size;
z.zalloc = NULL;
z.zfree = NULL;
z.opaque = NULL;
r = inflateInit2(&z, defl == 1 ? 15 : defl == 2 ? -15 : 15 + 16);
init_failed:
switch (r) {
case Z_OK: break;
case Z_MEM_ERROR: memory_error = 1;
err = 1;
goto after_inflateend;
case Z_STREAM_ERROR:
if (!defl && !old_zlib) {
if (defrag_entry(ce)) {
memory_error = 1;
err = 1;
goto after_inflateend;
}
r = inflateInit2(&z, -15);
skip_gzip_header = 1;
old_zlib = 1;
goto init_failed;
}
decompress_error(term, ce, cast_uchar "zlib", z.msg ? (unsigned char *)z.msg : (unsigned char *)"Invalid parameter", errp);
err = 1;
goto after_inflateend;
case Z_VERSION_ERROR: decompress_error(term, ce, cast_uchar "zlib", z.msg ? (unsigned char *)z.msg : (unsigned char *)"Bad zlib version", errp);
err = 1;
goto after_inflateend;
default: decompress_error(term, ce, cast_uchar "zlib", z.msg ? (unsigned char *)z.msg : (unsigned char *)"Unknown return value on inflateInit2", errp);
err = 1;
goto after_inflateend;
}
offset = 0;
foreach(f, ce->frag) {
if (f->offset != offset) break;
z.next_in = f->data;
z.avail_in = (unsigned)f->length;
if (z.avail_in != (unsigned)f->length) overalloc();
if (header && !offset) {
z.next_in = (unsigned char *)z.next_in + header;
z.avail_in -= header;
}
repeat_frag:
if (skip_gzip_header == 2) {
if (z.avail_in < 8) goto finish;
z.next_in = (unsigned char *)z.next_in + 8;
z.avail_in -= 8;
skip_gzip_header = 1;
}
if (skip_gzip_header) {
/* if zlib is old, we have to skip gzip header manually
otherwise zlib 1.2.x can do it automatically */
unsigned char *head = z.next_in;
unsigned headlen = 10;
if (z.avail_in <= 11) goto finish;
if (head[0] != 0x1f || head[1] != 0x8b) {
decompress_error(term, ce, cast_uchar "zlib", TEXT_(T_COMPRESSED_ERROR), errp);
err = 1;
goto finish;
}
if (head[2] != 8 || head[3] & 0xe0) {
decompress_error(term, ce, cast_uchar "zlib", TEXT_(T_UNKNOWN_COMPRESSION_METHOD), errp);
err = 1;
goto finish;
}
if (head[3] & 0x04) {
headlen += 2 + head[10] + (head[11] << 8);
if (headlen >= z.avail_in) goto finish;
}
if (head[3] & 0x08) {
do {
headlen++;
if (headlen >= z.avail_in) goto finish;
} while (head[headlen - 1]);
}
if (head[3] & 0x10) {
do {
headlen++;
if (headlen >= z.avail_in) goto finish;
} while (head[headlen - 1]);
}
if (head[3] & 0x01) {
headlen += 2;
if (headlen >= z.avail_in) goto finish;
}
z.next_in = (unsigned char *)z.next_in + headlen;
z.avail_in -= headlen;
skip_gzip_header = 0;
}
r = inflate(&z, (void *)f->next == (void *)&ce->frag ? Z_SYNC_FLUSH : Z_NO_FLUSH);
switch (r) {
case Z_OK: break;
case Z_BUF_ERROR: break;
case Z_STREAM_END: r = inflateEnd(&z);
if (r != Z_OK) goto end_failed;
r = inflateInit2(&z, old_zlib ? -15 : defl ? 15 : 15 + 16);
if (r != Z_OK) {
old_zlib = 0;
goto init_failed;
}
if (old_zlib) {
skip_gzip_header = 2;
}
break;
case Z_NEED_DICT:
case Z_DATA_ERROR: if (defl == 1) {
defl = 2;
r = inflateEnd(&z);
if (r != Z_OK) goto end_failed;
goto init_again;
}
decompress_error(term, ce, cast_uchar "zlib", z.msg ? (unsigned char *)z.msg : TEXT_(T_COMPRESSED_ERROR), errp);
err = 1;
goto finish;
case Z_STREAM_ERROR: decompress_error(term, ce, cast_uchar "zlib", z.msg ? (unsigned char *)z.msg : (unsigned char *)"Internal error on inflate", errp);
err = 1;
goto finish;
case Z_MEM_ERROR:
mem_error: memory_error = 1;
err = 1;
goto finish;
default: decompress_error(term, ce, cast_uchar "zlib", z.msg ? (unsigned char *)z.msg : (unsigned char *)"Unknown return value on inflate", errp);
err = 1;
break;
}
if (!z.avail_out) {
size_t addsize;
if (decoder_memory_expand(&p, size, &addsize) < 0)
goto mem_error;
z.next_out = p + size;
z.avail_out = addsize;
size += addsize;
}
if (z.avail_in) goto repeat_frag;
/* In zlib 1.1.3, inflate(Z_SYNC_FLUSH) doesn't work.
The following line fixes it --- for last fragment, loop until
we get an eof. */
if (r == Z_OK && (void *)f->next == (void *)&ce->frag) goto repeat_frag;
offset += f->length;
}
finish:
r = inflateEnd(&z);
end_failed:
switch (r) {
case Z_OK: break;
case Z_STREAM_ERROR: decompress_error(term, ce, cast_uchar "zlib", z.msg ? (unsigned char *)z.msg : (unsigned char *)"Internal error on inflateEnd", errp);
err = 1;
break;
case Z_MEM_ERROR: memory_error = 1;
err = 1;
break;
default: decompress_error(term, ce, cast_uchar "zlib", z.msg ? (unsigned char *)z.msg : (unsigned char *)"Unknown return value on inflateEnd", errp);
err = 1;
break;
}
after_inflateend:
if (memory_error) {
mem_free(p);
if (out_of_memory(0, NULL, 0))
goto retry_after_memory_error;
decompress_error(term, ce, cast_uchar "zlib", z.msg ? (unsigned char *)z.msg : TEXT_(T_OUT_OF_MEMORY), errp);
return 1;
}
if (err && (unsigned char *)z.next_out == p) {
mem_free(p);
return 1;
}
*p_start = p;
*p_len = (unsigned char *)z.next_out - (unsigned char *)p;
*p_start = mem_realloc(*p_start, *p_len);
return 0;
}
#endif
#ifdef HAVE_BZIP2
#include <bzlib.h>
static int decode_bzip2(struct terminal *term, struct cache_entry *ce, unsigned char **p_start, size_t *p_len, int *errp)
{
unsigned char err;
unsigned char memory_error;
bz_stream z;
off_t offset;
int r;
unsigned char *p;
struct fragment *f;
size_t size;
retry_after_memory_error:
err = 0;
memory_error = 0;
decoder_memory_init(&p, &size, ce->length);
memset(&z, 0, sizeof z);
z.next_in = NULL;
z.avail_in = 0;
z.next_out = cast_char p;
z.avail_out = size;
z.bzalloc = NULL;
z.bzfree = NULL;
z.opaque = NULL;
r = BZ2_bzDecompressInit(&z, 0, 0);
init_failed:
switch (r) {
case BZ_OK: break;
case BZ_MEM_ERROR: memory_error = 1;
err = 1;
goto after_inflateend;
case BZ_PARAM_ERROR:
decompress_error(term, ce, cast_uchar "bzip2", cast_uchar "Invalid parameter", errp);
err = 1;
goto after_inflateend;
case BZ_CONFIG_ERROR: decompress_error(term, ce, cast_uchar "bzip2", cast_uchar "Bzlib is miscompiled", errp);
err = 1;
goto after_inflateend;
default: decompress_error(term, ce, cast_uchar "bzip2", cast_uchar "Unknown return value on BZ2_bzDecompressInit", errp);
err = 1;
goto after_inflateend;
}
offset = 0;
foreach(f, ce->frag) {
if (f->offset != offset) break;
z.next_in = cast_char f->data;
z.avail_in = (unsigned)f->length;
if (z.avail_in != f->length) overalloc();
repeat_frag:
r = BZ2_bzDecompress(&z);
switch (r) {
case BZ_OK: break;
case BZ_STREAM_END:
r = BZ2_bzDecompressEnd(&z);
if (r != BZ_OK) goto end_failed;
r = BZ2_bzDecompressInit(&z, 0, 0);
if (r != BZ_OK) goto init_failed;
break;
case BZ_DATA_ERROR_MAGIC:
case BZ_DATA_ERROR: decompress_error(term, ce, cast_uchar "bzip2", TEXT_(T_COMPRESSED_ERROR), errp);
err = 1;
goto finish;
case BZ_PARAM_ERROR: decompress_error(term, ce, cast_uchar "bzip2", cast_uchar "Internal error on BZ2_bzDecompress", errp);
err = 1;
goto finish;
case BZ_MEM_ERROR:
mem_error: memory_error = 1;
err = 1;
goto finish;
default: decompress_error(term, ce, cast_uchar "bzip2", cast_uchar "Unknown return value on BZ2_bzDecompress", errp);
err = 1;
break;
}
if (!z.avail_out) {
size_t addsize;
if (decoder_memory_expand(&p, size, &addsize) < 0)
goto mem_error;
z.next_out = cast_char(p + size);
z.avail_out = addsize;
size += addsize;
}
if (z.avail_in) goto repeat_frag;
offset += f->length;
}
finish:
r = BZ2_bzDecompressEnd(&z);
end_failed:
switch (r) {
case BZ_OK: break;
case BZ_PARAM_ERROR: decompress_error(term, ce, cast_uchar "bzip2", cast_uchar "Internal error on BZ2_bzDecompressEnd", errp);
err = 1;
break;
case BZ_MEM_ERROR: memory_error = 1;
err = 1;
break;
default: decompress_error(term, ce, cast_uchar "bzip2", cast_uchar "Unknown return value on BZ2_bzDecompressEnd", errp);
err = 1;
break;
}
after_inflateend:
if (memory_error) {
mem_free(p);
if (out_of_memory(0, NULL, 0))
goto retry_after_memory_error;
decompress_error(term, ce, cast_uchar "bzip2", TEXT_(T_OUT_OF_MEMORY), errp);
return 1;
}
if (err && (unsigned char *)z.next_out == p) {
mem_free(p);
return 1;
}
*p_start = p;
*p_len = (unsigned char *)z.next_out - (unsigned char *)p;
*p_start = mem_realloc(*p_start, *p_len);
return 0;
}
#endif
#ifdef HAVE_LZMA
#undef internal
#include <lzma.h>
#define internal internal_
static int decode_lzma(struct terminal *term, struct cache_entry *ce, unsigned char **p_start, size_t *p_len, int *errp)
{
unsigned char err;
unsigned char memory_error;
lzma_stream z = LZMA_STREAM_INIT;
off_t offset;
int r;
unsigned char *p;
struct fragment *f;
size_t size;
retry_after_memory_error:
err = 0;
memory_error = 0;
decoder_memory_init(&p, &size, ce->length);
z.next_in = NULL;
z.avail_in = 0;
z.next_out = p;
z.avail_out = size;
r = lzma_auto_decoder(&z, UINT64_MAX, 0);
init_failed:
switch (r) {
case LZMA_OK: break;
case LZMA_MEM_ERROR: memory_error = 1;
err = 1;
goto after_inflateend;
case LZMA_OPTIONS_ERROR:
decompress_error(term, ce, cast_uchar "lzma", cast_uchar "Invalid parameter", errp);
err = 1;
goto after_inflateend;
case LZMA_PROG_ERROR: decompress_error(term, ce, cast_uchar "lzma", cast_uchar "Lzma is miscompiled", errp);
err = 1;
goto after_inflateend;
default: decompress_error(term, ce, cast_uchar "lzma", cast_uchar "Unknown return value on lzma_auto_decoder", errp);
err = 1;
goto after_inflateend;
}
offset = 0;
foreach(f, ce->frag) {
if (f->offset != offset) break;
z.next_in = f->data;
z.avail_in = (size_t)f->length;
if (z.avail_in != (size_t)f->length) overalloc();
repeat_frag:
r = lzma_code(&z, LZMA_RUN);
switch (r) {
case LZMA_OK:
case LZMA_NO_CHECK:
case LZMA_UNSUPPORTED_CHECK:
case LZMA_GET_CHECK:
break;
case LZMA_STREAM_END:
lzma_end(&z);
r = lzma_auto_decoder(&z, UINT64_MAX, 0);
if (r != LZMA_OK) goto init_failed;
break;
case LZMA_MEM_ERROR:
mem_error: memory_error = 1;
err = 1;
goto finish;
case LZMA_MEMLIMIT_ERROR:
decompress_error(term, ce, cast_uchar "lzma", cast_uchar "Memory limit was exceeded", errp);
err = 1;
goto finish;
case LZMA_FORMAT_ERROR:
case LZMA_DATA_ERROR:
case LZMA_BUF_ERROR:
decompress_error(term, ce, cast_uchar "lzma", TEXT_(T_COMPRESSED_ERROR), errp);
err = 1;
goto finish;
case LZMA_OPTIONS_ERROR:decompress_error(term, ce, cast_uchar "lzma", cast_uchar "File contains unsupported options", errp);
err = 1;
goto finish;
case LZMA_PROG_ERROR: decompress_error(term, ce, cast_uchar "lzma", cast_uchar "Lzma is miscompiled", errp);
err = 1;
goto finish;
default: decompress_error(term, ce, cast_uchar "lzma", cast_uchar "Unknown return value on lzma_code", errp);
err = 1;
break;
}
if (!z.avail_out) {
size_t addsize;
if (decoder_memory_expand(&p, size, &addsize) < 0)
goto mem_error;
z.next_out = p + size;
z.avail_out = addsize;
size += addsize;
}
if (z.avail_in) goto repeat_frag;
offset += f->length;
}
finish:
lzma_end(&z);
after_inflateend:
if (memory_error) {
mem_free(p);
if (out_of_memory(0, NULL, 0))
goto retry_after_memory_error;
decompress_error(term, ce, cast_uchar "lzma", TEXT_(T_OUT_OF_MEMORY), errp);
return 1;
}
if (err && (unsigned char *)z.next_out == p) {
mem_free(p);
return 1;
}
*p_start = p;
*p_len = (unsigned char *)z.next_out - (unsigned char *)p;
*p_start = mem_realloc(*p_start, *p_len);
return 0;
}
#endif
int get_file_by_term(struct terminal *term, struct cache_entry *ce, unsigned char **start, unsigned char **end, int *errp)
{
unsigned char *enc;
struct fragment *fr;
int e;
if (errp) *errp = 0;
*start = *end = NULL;
if (!ce) return 1;
if (ce->decompressed) {
#if defined(HAVE_ANY_COMPRESSION)
return_decompressed:
#endif
*start = ce->decompressed;
*end = ce->decompressed + ce->decompressed_len;
return 0;
}
enc = get_content_encoding(ce->head, ce->url);
if (enc) {
#ifdef HAVE_ZLIB
if (!strcasecmp(cast_const_char enc, "gzip") || !strcasecmp(cast_const_char enc, "x-gzip") || !strcasecmp(cast_const_char enc, "deflate")) {
int defl = !strcasecmp(cast_const_char enc, "deflate");
mem_free(enc);
if (decode_gzip(term, ce, &ce->decompressed, &ce->decompressed_len, defl, errp)) goto uncompressed;
decompressed_cache_size += ce->decompressed_len;
goto return_decompressed;
}
#endif
#ifdef HAVE_BZIP2
if (!strcasecmp(cast_const_char enc, "bzip2")) {
mem_free(enc);
if (decode_bzip2(term, ce, &ce->decompressed, &ce->decompressed_len, errp)) goto uncompressed;
decompressed_cache_size += ce->decompressed_len;
goto return_decompressed;
}
#endif
#ifdef HAVE_LZMA
if (!strcasecmp(cast_const_char enc, "lzma") || !strcasecmp(cast_const_char enc, "lzma2")) {
mem_free(enc);
if (decode_lzma(term, ce, &ce->decompressed, &ce->decompressed_len, errp)) goto uncompressed;
decompressed_cache_size += ce->decompressed_len;
goto return_decompressed;
}
#endif
mem_free(enc);
goto uncompressed;
}
uncompressed:
if ((e = defrag_entry(ce)) < 0) {
unsigned char *msg = get_err_msg(e);
if (display_error(term, TEXT_(T_ERROR), errp)) {
unsigned char *u = stracpy(ce->url), *uu;
if ((uu = cast_uchar strchr(cast_const_char u, POST_CHAR))) *uu = 0;
msg_box(term, getml(u, NULL), TEXT_(T_ERROR), AL_CENTER | AL_EXTD_TEXT, TEXT_(T_ERROR_LOADING), cast_uchar " ", u, cast_uchar ":\n\n", msg, NULL, NULL, 1, TEXT_(T_CANCEL), NULL, B_ENTER | B_ESC);
}
}
fr = ce->frag.next;
if ((void *)fr == &ce->frag || fr->offset || !fr->length) return 1;
*start = fr->data, *end = fr->data + fr->length;
return 0;
}
int get_file(struct object_request *o, unsigned char **start, unsigned char **end)
{
struct terminal *term;
*start = *end = NULL;
if (!o) return 1;
foreach(term, terminals) if (o->term == term->count) goto ok;
term = NULL;
ok:
return get_file_by_term(term, o->ce, start, end, NULL);
}
void free_decompressed_data(struct cache_entry *e)
{
if (e->decompressed) {
if (decompressed_cache_size < e->decompressed_len)
internal("free_decompressed_data: decompressed_cache_size underflow %lu, %lu", decompressed_cache_size, (unsigned long)e->decompressed_len);
decompressed_cache_size -= e->decompressed_len;
mem_free(e->decompressed);
e->decompressed = NULL;
e->decompressed_len = 0;
}
}
#ifdef HAVE_ANY_COMPRESSION
void add_compress_methods(unsigned char **s, int *l)
{
int cl = 0;
#ifdef HAVE_ZLIB
{
if (!cl) cl = 1; else add_to_str(s, l, cast_uchar ", ");
add_to_str(s, l, cast_uchar "ZLIB");
#ifdef zlib_version
add_to_str(s, l, cast_uchar " (");
add_to_str(s, l, (unsigned char *)zlib_version);
add_to_str(s, l, cast_uchar ")");
#endif
}
#endif
#ifdef HAVE_BZIP2
{
unsigned char *b = (unsigned char *)BZ2_bzlibVersion();
int bl = strcspn(cast_const_char b, ",");
if (!cl) cl = 1; else add_to_str(s, l, cast_uchar ", ");
add_to_str(s, l, cast_uchar "BZIP2");
add_to_str(s, l, cast_uchar " (");
add_bytes_to_str(s, l, b, bl);
add_to_str(s, l, cast_uchar ")");
}
#endif
#ifdef HAVE_LZMA
{
if (!cl) cl = 1; else add_to_str(s, l, cast_uchar ", ");
add_to_str(s, l, cast_uchar "LZMA");
add_to_str(s, l, cast_uchar " (");
add_to_str(s, l, cast_uchar lzma_version_string());
add_to_str(s, l, cast_uchar ")");
}
#endif
}
#endif
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