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lavf/url: rewrite ff_make_absolute_url() using ff_url_decompose().
Also add and update some tests. Change the semantic a little, because for filesytem paths symlinks complicate things. See the comments in the code for detail. Fix trac tickets #8813 and 8814.
This commit is contained in:
Nicolas George
parent
d853293679
commit
1201687da2
@ -49,7 +49,13 @@ static void test_decompose(const char *url)
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static void test(const char *base, const char *rel)
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static void test(const char *base, const char *rel)
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{
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{
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char buf[200], buf2[200];
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char buf[200], buf2[200];
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ff_make_absolute_url(buf, sizeof(buf), base, rel);
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int ret;
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ret = ff_make_absolute_url(buf, sizeof(buf), base, rel);
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if (ret < 0) {
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printf("%50s %-20s => error %s\n", base, rel, av_err2str(ret));
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return;
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}
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printf("%50s %-20s => %s\n", base, rel, buf);
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printf("%50s %-20s => %s\n", base, rel, buf);
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if (base) {
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if (base) {
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/* Test in-buffer replacement */
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/* Test in-buffer replacement */
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@ -104,6 +110,58 @@ int main(void)
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test("http://server/foo/bar", "/../../../../../other/url");
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test("http://server/foo/bar", "/../../../../../other/url");
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test("http://server/foo/bar", "/test/../../../../../other/url");
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test("http://server/foo/bar", "/test/../../../../../other/url");
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test("http://server/foo/bar", "/test/../../test/../../../other/url");
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test("http://server/foo/bar", "/test/../../test/../../../other/url");
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test("http://server/foo/bar", "file:../baz/qux");
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test("http://server/foo//bar/", "../../");
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test("file:../tmp/foo", "../bar/");
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test("file:../tmp/foo", "file:../bar/");
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test("http://server/foo/bar", "./");
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test("http://server/foo/bar", ".dotfile");
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test("http://server/foo/bar", "..doubledotfile");
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test("http://server/foo/bar", "double..dotfile");
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test("http://server/foo/bar", "doubledotfile..");
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/* From https://tools.ietf.org/html/rfc3986#section-5.4 */
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test("http://a/b/c/d;p?q", "g:h"); // g:h
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test("http://a/b/c/d;p?q", "g"); // http://a/b/c/g
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test("http://a/b/c/d;p?q", "./g"); // http://a/b/c/g
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test("http://a/b/c/d;p?q", "g/"); // http://a/b/c/g/
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test("http://a/b/c/d;p?q", "/g"); // http://a/g
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test("http://a/b/c/d;p?q", "//g"); // http://g
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test("http://a/b/c/d;p?q", "?y"); // http://a/b/c/d;p?y
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test("http://a/b/c/d;p?q", "g?y"); // http://a/b/c/g?y
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test("http://a/b/c/d;p?q", "#s"); // http://a/b/c/d;p?q#s
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test("http://a/b/c/d;p?q", "g#s"); // http://a/b/c/g#s
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test("http://a/b/c/d;p?q", "g?y#s"); // http://a/b/c/g?y#s
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test("http://a/b/c/d;p?q", ";x"); // http://a/b/c/;x
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test("http://a/b/c/d;p?q", "g;x"); // http://a/b/c/g;x
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test("http://a/b/c/d;p?q", "g;x?y#s"); // http://a/b/c/g;x?y#s
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test("http://a/b/c/d;p?q", ""); // http://a/b/c/d;p?q
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test("http://a/b/c/d;p?q", "."); // http://a/b/c/
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test("http://a/b/c/d;p?q", "./"); // http://a/b/c/
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test("http://a/b/c/d;p?q", ".."); // http://a/b/
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test("http://a/b/c/d;p?q", "../"); // http://a/b/
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test("http://a/b/c/d;p?q", "../g"); // http://a/b/g
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test("http://a/b/c/d;p?q", "../.."); // http://a/
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test("http://a/b/c/d;p?q", "../../"); // http://a/
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test("http://a/b/c/d;p?q", "../../g"); // http://a/g
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test("http://a/b/c/d;p?q", "../../../g"); // http://a/g
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test("http://a/b/c/d;p?q", "../../../../g"); // http://a/g
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test("http://a/b/c/d;p?q", "/./g"); // http://a/g
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test("http://a/b/c/d;p?q", "/../g"); // http://a/g
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test("http://a/b/c/d;p?q", "g."); // http://a/b/c/g.
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test("http://a/b/c/d;p?q", ".g"); // http://a/b/c/.g
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test("http://a/b/c/d;p?q", "g.."); // http://a/b/c/g..
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test("http://a/b/c/d;p?q", "..g"); // http://a/b/c/..g
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test("http://a/b/c/d;p?q", "./../g"); // http://a/b/g
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test("http://a/b/c/d;p?q", "./g/."); // http://a/b/c/g/
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test("http://a/b/c/d;p?q", "g/./h"); // http://a/b/c/g/h
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test("http://a/b/c/d;p?q", "g/../h"); // http://a/b/c/h
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test("http://a/b/c/d;p?q", "g;x=1/./y"); // http://a/b/c/g;x=1/y
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test("http://a/b/c/d;p?q", "g;x=1/../y"); // http://a/b/c/y
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test("http://a/b/c/d;p?q", "g?y/./x"); // http://a/b/c/g?y/./x
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test("http://a/b/c/d;p?q", "g?y/../x"); // http://a/b/c/g?y/../x
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test("http://a/b/c/d;p?q", "g#s/./x"); // http://a/b/c/g#s/./x
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test("http://a/b/c/d;p?q", "g#s/../x"); // http://a/b/c/g#s/../x
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printf("\nTesting av_url_split:\n");
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printf("\nTesting av_url_split:\n");
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test2("/foo/bar");
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test2("/foo/bar");
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@ -149,146 +149,149 @@ int ff_url_decompose(URLComponents *uc, const char *url, const char *end)
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return 0;
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return 0;
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}
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}
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static void trim_double_dot_url(char *buf, const char *rel, int size)
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static int append_path(char *root, char *out_end, char **rout,
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const char *in, const char *in_end)
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{
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{
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const char *p = rel;
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char *out = *rout;
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const char *root = rel;
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const char *d, *next;
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char tmp_path[MAX_URL_SIZE] = {0, };
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char *sep;
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char *node;
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/* Get the path root of the url which start by "://" */
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if (in < in_end && *in == '/')
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if (p && (sep = strstr(p, "://"))) {
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in++; /* already taken care of */
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sep += 3;
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while (in < in_end) {
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root = strchr(sep, '/');
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d = find_delim("/", in, in_end);
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if (!root)
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next = d + (d < in_end && *d == '/');
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return;
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if (d - in == 1 && in[0] == '.') {
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/* skip */
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} else if (d - in == 2 && in[0] == '.' && in[1] == '.') {
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av_assert1(out[-1] == '/');
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if (out - root > 1)
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while (out > root && (--out)[-1] != '/');
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} else {
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if (out_end - out < next - in)
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return AVERROR(ENOMEM);
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memmove(out, in, next - in);
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out += next - in;
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}
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in = next;
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}
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}
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*rout = out;
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/* set new current position if the root node is changed */
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return 0;
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p = root;
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while (p && (node = strstr(p, ".."))) {
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av_strlcat(tmp_path, p, node - p + strlen(tmp_path));
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p = node + 3;
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sep = strrchr(tmp_path, '/');
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if (sep)
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sep[0] = '\0';
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else
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tmp_path[0] = '\0';
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}
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if (!av_stristart(p, "/", NULL) && root != rel)
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av_strlcat(tmp_path, "/", size);
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av_strlcat(tmp_path, p, size);
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/* start set buf after temp path process. */
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av_strlcpy(buf, rel, root - rel + 1);
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if (!av_stristart(tmp_path, "/", NULL) && root != rel)
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av_strlcat(buf, "/", size);
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av_strlcat(buf, tmp_path, size);
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}
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}
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void ff_make_absolute_url(char *buf, int size, const char *base,
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int ff_make_absolute_url(char *buf, int size, const char *base,
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const char *rel)
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const char *rel)
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{
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{
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char *sep, *path_query;
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URLComponents ub, uc;
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char *root, *p;
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char *out, *out_end, *path;
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char tmp_path[MAX_URL_SIZE];
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const char *keep, *base_path_end;
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int use_base_path, simplify_path = 0, ret;
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memset(tmp_path, 0, sizeof(tmp_path));
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/* This is tricky.
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/* Absolute path, relative to the current server */
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For HTTP, http://server/site/page + ../media/file
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if (base && strstr(base, "://") && rel[0] == '/') {
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should resolve into http://server/media/file
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if (base != buf)
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but for filesystem access, dir/playlist + ../media/file
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av_strlcpy(buf, base, size);
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should resolve into dir/../media/file
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sep = strstr(buf, "://");
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because dir could be a symlink, and .. points to
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if (sep) {
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the actual parent of the target directory.
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/* Take scheme from base url */
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if (rel[1] == '/') {
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We'll consider that URLs with an actual scheme and authority,
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sep[1] = '\0';
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i.e. starting with scheme://, need parent dir simplification,
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} else {
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while bare paths or pseudo-URLs starting with proto: without
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/* Take scheme and host from base url */
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the double slash do not.
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sep += 3;
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sep = strchr(sep, '/');
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For real URLs, the processing is similar to the algorithm described
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if (sep)
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here:
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*sep = '\0';
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https://tools.ietf.org/html/rfc3986#section-5
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}
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*/
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if (!size)
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return AVERROR(ENOMEM);
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out = buf;
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out_end = buf + size - 1;
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if (!base)
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base = "";
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if ((ret = ff_url_decompose(&ub, base, NULL) < 0) ||
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(ret = ff_url_decompose(&uc, rel, NULL) < 0))
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goto error;
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keep = ub.url;
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#define KEEP(component, also) do { \
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if (uc.url_component_end_##component == uc.url && \
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ub.url_component_end_##component > keep) { \
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keep = ub.url_component_end_##component; \
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also \
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} \
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} while (0)
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KEEP(scheme, );
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KEEP(authority_full, simplify_path = 1;);
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KEEP(path,);
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KEEP(query,);
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KEEP(fragment,);
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#undef KEEP
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#define COPY(start, end) do { \
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size_t len = end - start; \
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if (len > out_end - out) { \
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ret = AVERROR(ENOMEM); \
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goto error; \
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} \
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memmove(out, start, len); \
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out += len; \
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} while (0)
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COPY(ub.url, keep);
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COPY(uc.url, uc.path);
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use_base_path = URL_COMPONENT_HAVE(ub, path) && keep <= ub.path;
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if (uc.path > uc.url)
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use_base_path = 0;
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if (URL_COMPONENT_HAVE(uc, path) && uc.path[0] == '/')
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use_base_path = 0;
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if (use_base_path) {
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base_path_end = ub.url_component_end_path;
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if (URL_COMPONENT_HAVE(uc, path))
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while (base_path_end > ub.path && base_path_end[-1] != '/')
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base_path_end--;
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}
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if (keep > ub.path)
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simplify_path = 0;
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if (URL_COMPONENT_HAVE(uc, scheme))
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simplify_path = 0;
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if (URL_COMPONENT_HAVE(uc, authority))
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simplify_path = 1;
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/* No path at all, leave it */
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if (!use_base_path && !URL_COMPONENT_HAVE(uc, path))
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simplify_path = 0;
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if (simplify_path) {
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const char *root = "/";
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COPY(root, root + 1);
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path = out;
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if (use_base_path) {
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ret = append_path(path, out_end, &out, ub.path, base_path_end);
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if (ret < 0)
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goto error;
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}
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}
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av_strlcat(buf, rel, size);
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if (URL_COMPONENT_HAVE(uc, path)) {
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trim_double_dot_url(tmp_path, buf, size);
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ret = append_path(path, out_end, &out, uc.path, uc.url_component_end_path);
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memset(buf, 0, size);
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if (ret < 0)
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av_strlcpy(buf, tmp_path, size);
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goto error;
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return;
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}
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/* If rel actually is an absolute url, just copy it */
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if (!base || strstr(rel, "://") || rel[0] == '/') {
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memset(buf, 0, size);
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trim_double_dot_url(buf, rel, size);
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return;
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}
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if (base != buf)
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av_strlcpy(buf, base, size);
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/* Strip off any query string from base */
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path_query = strchr(buf, '?');
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if (path_query)
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*path_query = '\0';
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/* Is relative path just a new query part? */
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if (rel[0] == '?') {
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av_strlcat(buf, rel, size);
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trim_double_dot_url(tmp_path, buf, size);
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memset(buf, 0, size);
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av_strlcpy(buf, tmp_path, size);
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return;
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}
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root = p = buf;
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/* Get the path root of the url which start by "://" */
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if (p && strstr(p, "://")) {
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sep = strstr(p, "://");
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if (sep) {
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sep += 3;
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root = strchr(sep, '/');
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if (!root)
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return;
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}
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}
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} else {
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if (use_base_path)
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COPY(ub.path, base_path_end);
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COPY(uc.path, uc.url_component_end_path);
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}
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}
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/* Remove the file name from the base url */
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COPY(uc.url_component_end_path, uc.end);
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sep = strrchr(buf, '/');
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#undef COPY
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if (sep && sep <= root)
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*out = 0;
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sep = root;
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return 0;
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if (sep)
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error:
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sep[1] = '\0';
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snprintf(buf, size, "invalid:%s",
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else
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ret == AVERROR(ENOMEM) ? "truncated" :
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buf[0] = '\0';
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ret == AVERROR(EINVAL) ? "syntax_error" : "");
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while (av_strstart(rel, "..", NULL) && sep) {
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return ret;
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/* Remove the path delimiter at the end */
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if (sep > root) {
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sep[0] = '\0';
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sep = strrchr(buf, '/');
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}
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/* If the next directory name to pop off is "..", break here */
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if (!strcmp(sep ? &sep[1] : buf, "..")) {
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/* Readd the slash we just removed */
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av_strlcat(buf, "/", size);
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break;
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}
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/* Cut off the directory name */
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if (sep)
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sep[1] = '\0';
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else
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buf[0] = '\0';
|
|
||||||
rel += 3;
|
|
||||||
}
|
|
||||||
av_strlcat(buf, rel, size);
|
|
||||||
trim_double_dot_url(tmp_path, buf, size);
|
|
||||||
memset(buf, 0, size);
|
|
||||||
av_strlcpy(buf, tmp_path, size);
|
|
||||||
}
|
}
|
||||||
|
|
||||||
AVIODirEntry *ff_alloc_dir_entry(void)
|
AVIODirEntry *ff_alloc_dir_entry(void)
|
||||||
|
|||||||
@ -312,8 +312,8 @@ int ff_url_join(char *str, int size, const char *proto,
|
|||||||
* @param base the base url, may be equal to buf.
|
* @param base the base url, may be equal to buf.
|
||||||
* @param rel the new url, which is interpreted relative to base
|
* @param rel the new url, which is interpreted relative to base
|
||||||
*/
|
*/
|
||||||
void ff_make_absolute_url(char *buf, int size, const char *base,
|
int ff_make_absolute_url(char *buf, int size, const char *base,
|
||||||
const char *rel);
|
const char *rel);
|
||||||
|
|
||||||
/**
|
/**
|
||||||
* Allocate directory entry with default values.
|
* Allocate directory entry with default values.
|
||||||
|
|||||||
@ -46,9 +46,9 @@ http://[::1]:8080/dev/null =>
|
|||||||
Testing ff_make_absolute_url:
|
Testing ff_make_absolute_url:
|
||||||
(null) baz => baz
|
(null) baz => baz
|
||||||
/foo/bar baz => /foo/baz
|
/foo/bar baz => /foo/baz
|
||||||
/foo/bar ../baz => /baz
|
/foo/bar ../baz => /foo/../baz
|
||||||
/foo/bar /baz => /baz
|
/foo/bar /baz => /baz
|
||||||
/foo/bar ../../../baz => /baz
|
/foo/bar ../../../baz => /foo/../../../baz
|
||||||
http://server/foo/ baz => http://server/foo/baz
|
http://server/foo/ baz => http://server/foo/baz
|
||||||
http://server/foo/bar baz => http://server/foo/baz
|
http://server/foo/bar baz => http://server/foo/baz
|
||||||
http://server/foo/ ../baz => http://server/baz
|
http://server/foo/ ../baz => http://server/baz
|
||||||
@ -62,6 +62,56 @@ Testing ff_make_absolute_url:
|
|||||||
http://server/foo/bar /../../../../../other/url => http://server/other/url
|
http://server/foo/bar /../../../../../other/url => http://server/other/url
|
||||||
http://server/foo/bar /test/../../../../../other/url => http://server/other/url
|
http://server/foo/bar /test/../../../../../other/url => http://server/other/url
|
||||||
http://server/foo/bar /test/../../test/../../../other/url => http://server/other/url
|
http://server/foo/bar /test/../../test/../../../other/url => http://server/other/url
|
||||||
|
http://server/foo/bar file:../baz/qux => file:../baz/qux
|
||||||
|
http://server/foo//bar/ ../../ => http://server/foo/
|
||||||
|
file:../tmp/foo ../bar/ => file:../tmp/../bar/
|
||||||
|
file:../tmp/foo file:../bar/ => file:../bar/
|
||||||
|
http://server/foo/bar ./ => http://server/foo/
|
||||||
|
http://server/foo/bar .dotfile => http://server/foo/.dotfile
|
||||||
|
http://server/foo/bar ..doubledotfile => http://server/foo/..doubledotfile
|
||||||
|
http://server/foo/bar double..dotfile => http://server/foo/double..dotfile
|
||||||
|
http://server/foo/bar doubledotfile.. => http://server/foo/doubledotfile..
|
||||||
|
http://a/b/c/d;p?q g:h => g:h
|
||||||
|
http://a/b/c/d;p?q g => http://a/b/c/g
|
||||||
|
http://a/b/c/d;p?q ./g => http://a/b/c/g
|
||||||
|
http://a/b/c/d;p?q g/ => http://a/b/c/g/
|
||||||
|
http://a/b/c/d;p?q /g => http://a/g
|
||||||
|
http://a/b/c/d;p?q //g => http://g
|
||||||
|
http://a/b/c/d;p?q ?y => http://a/b/c/d;p?y
|
||||||
|
http://a/b/c/d;p?q g?y => http://a/b/c/g?y
|
||||||
|
http://a/b/c/d;p?q #s => http://a/b/c/d;p?q#s
|
||||||
|
http://a/b/c/d;p?q g#s => http://a/b/c/g#s
|
||||||
|
http://a/b/c/d;p?q g?y#s => http://a/b/c/g?y#s
|
||||||
|
http://a/b/c/d;p?q ;x => http://a/b/c/;x
|
||||||
|
http://a/b/c/d;p?q g;x => http://a/b/c/g;x
|
||||||
|
http://a/b/c/d;p?q g;x?y#s => http://a/b/c/g;x?y#s
|
||||||
|
http://a/b/c/d;p?q => http://a/b/c/d;p?q
|
||||||
|
http://a/b/c/d;p?q . => http://a/b/c/
|
||||||
|
http://a/b/c/d;p?q ./ => http://a/b/c/
|
||||||
|
http://a/b/c/d;p?q .. => http://a/b/
|
||||||
|
http://a/b/c/d;p?q ../ => http://a/b/
|
||||||
|
http://a/b/c/d;p?q ../g => http://a/b/g
|
||||||
|
http://a/b/c/d;p?q ../.. => http://a/
|
||||||
|
http://a/b/c/d;p?q ../../ => http://a/
|
||||||
|
http://a/b/c/d;p?q ../../g => http://a/g
|
||||||
|
http://a/b/c/d;p?q ../../../g => http://a/g
|
||||||
|
http://a/b/c/d;p?q ../../../../g => http://a/g
|
||||||
|
http://a/b/c/d;p?q /./g => http://a/g
|
||||||
|
http://a/b/c/d;p?q /../g => http://a/g
|
||||||
|
http://a/b/c/d;p?q g. => http://a/b/c/g.
|
||||||
|
http://a/b/c/d;p?q .g => http://a/b/c/.g
|
||||||
|
http://a/b/c/d;p?q g.. => http://a/b/c/g..
|
||||||
|
http://a/b/c/d;p?q ..g => http://a/b/c/..g
|
||||||
|
http://a/b/c/d;p?q ./../g => http://a/b/g
|
||||||
|
http://a/b/c/d;p?q ./g/. => http://a/b/c/g/
|
||||||
|
http://a/b/c/d;p?q g/./h => http://a/b/c/g/h
|
||||||
|
http://a/b/c/d;p?q g/../h => http://a/b/c/h
|
||||||
|
http://a/b/c/d;p?q g;x=1/./y => http://a/b/c/g;x=1/y
|
||||||
|
http://a/b/c/d;p?q g;x=1/../y => http://a/b/c/y
|
||||||
|
http://a/b/c/d;p?q g?y/./x => http://a/b/c/g?y/./x
|
||||||
|
http://a/b/c/d;p?q g?y/../x => http://a/b/c/g?y/../x
|
||||||
|
http://a/b/c/d;p?q g#s/./x => http://a/b/c/g#s/./x
|
||||||
|
http://a/b/c/d;p?q g#s/../x => http://a/b/c/g#s/../x
|
||||||
|
|
||||||
Testing av_url_split:
|
Testing av_url_split:
|
||||||
/foo/bar => -1 /foo/bar
|
/foo/bar => -1 /foo/bar
|
||||||
|
|||||||
Loading…
Reference in New Issue
Block a user