Revision b81401c1de0e0fec39f8643ce7a794fda083f7a1 authored by Jeff King on 27 August 2012, 13:27:15 UTC, committed by Junio C Hamano on 27 August 2012, 17:49:09 UTC
All of the smart-http GET requests go through the http_get_*
functions, which will prompt for credentials and retry if we
see an HTTP 401.
POST requests, however, do not go through any central point.
Moreover, it is difficult to retry in the general case; we
cannot assume the request body fits in memory or is even
seekable, and we don't know how much of it was consumed
during the attempt.
Most of the time, this is not a big deal; for both fetching
and pushing, we make a GET request before doing any POSTs,
so typically we figure out the credentials during the first
request, then reuse them during the POST. However, some
servers may allow a client to get the list of refs from
receive-pack without authentication, and then require
authentication when the client actually tries to POST the
pack.
This is not ideal, as the client may do a non-trivial amount
of work to generate the pack (e.g., delta-compressing
objects). However, for a long time it has been the
recommended example configuration in git-http-backend(1) for
setting up a repository with anonymous fetch and
authenticated push. This setup has always been broken
without putting a username into the URL. Prior to commit
986bbc0, it did work with a username in the URL, because git
would prompt for credentials before making any requests at
all. However, post-986bbc0, it is totally broken. Since it
has been advertised in the manpage for some time, we should
make sure it works.
Unfortunately, it is not as easy as simply calling post_rpc
again when it fails, due to the input issue mentioned above.
However, we can still make this specific case work by
retrying in two specific instances:
1. If the request is large (bigger than LARGE_PACKET_MAX),
we will first send a probe request with a single flush
packet. Since this request is static, we can freely
retry it.
2. If the request is small and we are not using gzip, then
we have the whole thing in-core, and we can freely
retry.
That means we will not retry in some instances, including:
1. If we are using gzip. However, we only do so when
calling git-upload-pack, so it does not apply to
pushes.
2. If we have a large request, the probe succeeds, but
then the real POST wants authentication. This is an
extremely unlikely configuration and not worth worrying
about.
While it might be nice to cover those instances, doing so
would be significantly more complex for very little
real-world gain. In the long run, we will be much better off
when curl learns to internally handle authentication as a
callback, and we can cleanly handle all cases that way.
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
1 parent 8809703
dir.h
#ifndef DIR_H
#define DIR_H
struct dir_entry {
unsigned int len;
char name[FLEX_ARRAY]; /* more */
};
#define EXC_FLAG_NODIR 1
#define EXC_FLAG_NOWILDCARD 2
#define EXC_FLAG_ENDSWITH 4
#define EXC_FLAG_MUSTBEDIR 8
struct exclude_list {
int nr;
int alloc;
struct exclude {
const char *pattern;
int patternlen;
const char *base;
int baselen;
int to_exclude;
int flags;
} **excludes;
};
struct exclude_stack {
struct exclude_stack *prev;
char *filebuf;
int baselen;
int exclude_ix;
};
struct dir_struct {
int nr, alloc;
int ignored_nr, ignored_alloc;
enum {
DIR_SHOW_IGNORED = 1<<0,
DIR_SHOW_OTHER_DIRECTORIES = 1<<1,
DIR_HIDE_EMPTY_DIRECTORIES = 1<<2,
DIR_NO_GITLINKS = 1<<3,
DIR_COLLECT_IGNORED = 1<<4
} flags;
struct dir_entry **entries;
struct dir_entry **ignored;
/* Exclude info */
const char *exclude_per_dir;
struct exclude_list exclude_list[3];
/*
* We maintain three exclude pattern lists:
* EXC_CMDL lists patterns explicitly given on the command line.
* EXC_DIRS lists patterns obtained from per-directory ignore files.
* EXC_FILE lists patterns from fallback ignore files.
*/
#define EXC_CMDL 0
#define EXC_DIRS 1
#define EXC_FILE 2
struct exclude_stack *exclude_stack;
char basebuf[PATH_MAX];
};
#define MATCHED_RECURSIVELY 1
#define MATCHED_FNMATCH 2
#define MATCHED_EXACTLY 3
extern char *common_prefix(const char **pathspec);
extern int match_pathspec(const char **pathspec, const char *name, int namelen, int prefix, char *seen);
extern int match_pathspec_depth(const struct pathspec *pathspec,
const char *name, int namelen,
int prefix, char *seen);
extern int within_depth(const char *name, int namelen, int depth, int max_depth);
extern int fill_directory(struct dir_struct *dir, const char **pathspec);
extern int read_directory(struct dir_struct *, const char *path, int len, const char **pathspec);
extern int excluded_from_list(const char *pathname, int pathlen, const char *basename,
int *dtype, struct exclude_list *el);
extern int excluded(struct dir_struct *, const char *, int *);
struct dir_entry *dir_add_ignored(struct dir_struct *dir, const char *pathname, int len);
extern int add_excludes_from_file_to_list(const char *fname, const char *base, int baselen,
char **buf_p, struct exclude_list *which, int check_index);
extern void add_excludes_from_file(struct dir_struct *, const char *fname);
extern void add_exclude(const char *string, const char *base,
int baselen, struct exclude_list *which);
extern void free_excludes(struct exclude_list *el);
extern int file_exists(const char *);
extern int is_inside_dir(const char *dir);
extern int dir_inside_of(const char *subdir, const char *dir);
static inline int is_dot_or_dotdot(const char *name)
{
return (name[0] == '.' &&
(name[1] == '\0' ||
(name[1] == '.' && name[2] == '\0')));
}
extern int is_empty_dir(const char *dir);
extern void setup_standard_excludes(struct dir_struct *dir);
#define REMOVE_DIR_EMPTY_ONLY 01
#define REMOVE_DIR_KEEP_NESTED_GIT 02
#define REMOVE_DIR_KEEP_TOPLEVEL 04
extern int remove_dir_recursively(struct strbuf *path, int flag);
/* tries to remove the path with empty directories along it, ignores ENOENT */
extern int remove_path(const char *path);
extern int strcmp_icase(const char *a, const char *b);
extern int strncmp_icase(const char *a, const char *b, size_t count);
extern int fnmatch_icase(const char *pattern, const char *string, int flags);
#endif
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