mirrors/git
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Merge branch 'jk/http-auth-redirects'

Browse Source 
Handle the case where http transport gets redirected during the
authorization request better.

* jk/http-auth-redirects:
  http.c: Spell the null pointer as NULL
  remote-curl: rewrite base url from info/refs redirects
  remote-curl: store url as a strbuf
  remote-curl: make refs_url a strbuf
  http: update base URLs when we see redirects
  http: provide effective url to callers
  http: hoist credential request out of handle_curl_result
  http: refactor options to http_get_*
  http_request: factor out curlinfo_strbuf
  http_get_file: style fixes
This commit is contained in:
Junio C Hamano
2013-10-30 12:09:53 -07:00
parent 0d6cf2471f 70900eda4a
commit 177f0a4009
7 changed files with 193 additions and 67 deletions
Download Patch File Download Diff File Expand all files Collapse all files

141
http.c
View File

@ -47,7 +47,7 @@ static int curl_ftp_no_epsv;
static const char *curl_http_proxy;
static const char *curl_cookie_file;
static int curl_save_cookies;
static struct credential http_auth = CREDENTIAL_INIT;
struct credential http_auth = CREDENTIAL_INIT;
static int http_proactive_auth;
static const char *user_agent;
@ -861,7 +861,6 @@ int handle_curl_result(struct slot_results *results)
credential_reject(&http_auth);
return HTTP_NOAUTH;
} else {
credential_fill(&http_auth);
return HTTP_REAUTH;
}
} else {
@ -875,12 +874,25 @@ int handle_curl_result(struct slot_results *results)
}
}
static CURLcode curlinfo_strbuf(CURL *curl, CURLINFO info, struct strbuf *buf)
{
char *ptr;
CURLcode ret;
strbuf_reset(buf);
ret = curl_easy_getinfo(curl, info, &ptr);
if (!ret && ptr)
strbuf_addstr(buf, ptr);
return ret;
}
/* http_request() targets */
#define HTTP_REQUEST_STRBUF 0
#define HTTP_REQUEST_FILE 1
static int http_request(const char *url, struct strbuf *type,
void *result, int target, int options)
static int http_request(const char *url,
void *result, int target,
const struct http_get_options *options)
{
struct active_request_slot *slot;
struct slot_results results;
@ -913,9 +925,9 @@ static int http_request(const char *url, struct strbuf *type,
}
strbuf_addstr(&buf, "Pragma:");
if (options & HTTP_NO_CACHE)
if (options && options->no_cache)
strbuf_addstr(&buf, " no-cache");
if (options & HTTP_KEEP_ERROR)
if (options && options->keep_error)
curl_easy_setopt(slot->curl, CURLOPT_FAILONERROR, 0);
headers = curl_slist_append(headers, buf.buf);
@ -933,13 +945,13 @@ static int http_request(const char *url, struct strbuf *type,
ret = HTTP_START_FAILED;
}
if (type) {
char *t;
strbuf_reset(type);
curl_easy_getinfo(slot->curl, CURLINFO_CONTENT_TYPE, &t);
if (t)
strbuf_addstr(type, t);
}
if (options && options->content_type)
curlinfo_strbuf(slot->curl, CURLINFO_CONTENT_TYPE,
options->content_type);
if (options && options->effective_url)
curlinfo_strbuf(slot->curl, CURLINFO_EFFECTIVE_URL,
options->effective_url);
curl_slist_free_all(headers);
strbuf_release(&buf);
@ -947,12 +959,71 @@ static int http_request(const char *url, struct strbuf *type,
return ret;
}
static int http_request_reauth(const char *url,
struct strbuf *type,
void *result, int target,
int options)
/*
* Update the "base" url to a more appropriate value, as deduced by
* redirects seen when requesting a URL starting with "url".
*
* The "asked" parameter is a URL that we asked curl to access, and must begin
* with "base".
*
* The "got" parameter is the URL that curl reported to us as where we ended
* up.
*
* Returns 1 if we updated the base url, 0 otherwise.
*
* Our basic strategy is to compare "base" and "asked" to find the bits
* specific to our request. We then strip those bits off of "got" to yield the
* new base. So for example, if our base is "http://example.com/foo.git",
* and we ask for "http://example.com/foo.git/info/refs", we might end up
* with "https://other.example.com/foo.git/info/refs". We would want the
* new URL to become "https://other.example.com/foo.git".
*
* Note that this assumes a sane redirect scheme. It's entirely possible
* in the example above to end up at a URL that does not even end in
* "info/refs". In such a case we simply punt, as there is not much we can
* do (and such a scheme is unlikely to represent a real git repository,
* which means we are likely about to abort anyway).
*/
static int update_url_from_redirect(struct strbuf *base,
const char *asked,
const struct strbuf *got)
{
int ret = http_request(url, type, result, target, options);
const char *tail;
size_t tail_len;
if (!strcmp(asked, got->buf))
return 0;
if (prefixcmp(asked, base->buf))
die("BUG: update_url_from_redirect: %s is not a superset of %s",
asked, base->buf);
tail = asked + base->len;
tail_len = strlen(tail);
if (got->len < tail_len ||
strcmp(tail, got->buf + got->len - tail_len))
return 0; /* insane redirect scheme */
strbuf_reset(base);
strbuf_add(base, got->buf, got->len - tail_len);
return 1;
}
static int http_request_reauth(const char *url,
void *result, int target,
struct http_get_options *options)
{
int ret = http_request(url, result, target, options);
if (options && options->effective_url && options->base_url) {
if (update_url_from_redirect(options->base_url,
url, options->effective_url)) {
credential_from_url(&http_auth, options->base_url->buf);
url = options->effective_url->buf;
}
}
if (ret != HTTP_REAUTH)
return ret;
@ -962,7 +1033,7 @@ static int http_request_reauth(const char *url,
* making our next request. We only know how to do this for
* the strbuf case, but that is enough to satisfy current callers.
*/
if (options & HTTP_KEEP_ERROR) {
if (options && options->keep_error) {
switch (target) {
case HTTP_REQUEST_STRBUF:
strbuf_reset(result);
@ -971,15 +1042,17 @@ static int http_request_reauth(const char *url,
die("BUG: HTTP_KEEP_ERROR is only supported with strbufs");
}
}
return http_request(url, type, result, target, options);
credential_fill(&http_auth);
return http_request(url, result, target, options);
}
int http_get_strbuf(const char *url,
struct strbuf *type,
struct strbuf *result, int options)
struct strbuf *result,
struct http_get_options *options)
{
return http_request_reauth(url, type, result,
HTTP_REQUEST_STRBUF, options);
return http_request_reauth(url, result, HTTP_REQUEST_STRBUF, options);
}
/*
@ -988,7 +1061,8 @@ int http_get_strbuf(const char *url,
* If a previous interrupted download is detected (i.e. a previous temporary
* file is still around) the download is resumed.
*/
static int http_get_file(const char *url, const char *filename, int options)
static int http_get_file(const char *url, const char *filename,
struct http_get_options *options)
{
int ret;
struct strbuf tmpfile = STRBUF_INIT;
@ -996,16 +1070,16 @@ static int http_get_file(const char *url, const char *filename, int options)
strbuf_addf(&tmpfile, "%s.temp", filename);
result = fopen(tmpfile.buf, "a");
if (! result) {
if (!result) {
error("Unable to open local file %s", tmpfile.buf);
ret = HTTP_ERROR;
goto cleanup;
}
ret = http_request_reauth(url, NULL, result, HTTP_REQUEST_FILE, options);
ret = http_request_reauth(url, result, HTTP_REQUEST_FILE, options);
fclose(result);
if ((ret == HTTP_OK) && move_temp_to_file(tmpfile.buf, filename))
if (ret == HTTP_OK && move_temp_to_file(tmpfile.buf, filename))
ret = HTTP_ERROR;
cleanup:
strbuf_release(&tmpfile);
@ -1014,12 +1088,15 @@ cleanup:
int http_fetch_ref(const char *base, struct ref *ref)
{
struct http_get_options options = {0};
char *url;
struct strbuf buffer = STRBUF_INIT;
int ret = -1;
options.no_cache = 1;
url = quote_ref_url(base, ref->name);
if (http_get_strbuf(url, NULL, &buffer, HTTP_NO_CACHE) == HTTP_OK) {
if (http_get_strbuf(url, &buffer, &options) == HTTP_OK) {
strbuf_rtrim(&buffer);
if (buffer.len == 40)
ret = get_sha1_hex(buffer.buf, ref->old_sha1);
@ -1050,7 +1127,7 @@ static char *fetch_pack_index(unsigned char *sha1, const char *base_url)
strbuf_addf(&buf, "%s.temp", sha1_pack_index_name(sha1));
tmp = strbuf_detach(&buf, NULL);
if (http_get_file(url, tmp, 0) != HTTP_OK) {
if (http_get_file(url, tmp, NULL) != HTTP_OK) {
error("Unable to get pack index %s", url);
free(tmp);
tmp = NULL;
@ -1103,6 +1180,7 @@ add_pack:
int http_get_info_packs(const char *base_url, struct packed_git **packs_head)
{
struct http_get_options options = {0};
int ret = 0, i = 0;
char *url, *data;
struct strbuf buf = STRBUF_INIT;
@ -1112,7 +1190,8 @@ int http_get_info_packs(const char *base_url, struct packed_git **packs_head)
strbuf_addstr(&buf, "objects/info/packs");
url = strbuf_detach(&buf, NULL);
ret = http_get_strbuf(url, NULL, &buf, HTTP_NO_CACHE);
options.no_cache = 1;
ret = http_get_strbuf(url, &buf, &options);
if (ret != HTTP_OK)
goto cleanup;