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http: refactor options to http_get_*

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Over time, the http_get_strbuf function has grown several
optional parameters. We now have a bitfield with multiple
boolean options, as well as an optional strbuf for returning
the content-type of the response. And a future patch in this
series is going to add another strbuf option.

Treating these as separate arguments has a few downsides:

  1. Most call sites need to add extra NULLs and 0s for the
     options they aren't interested in.

  2. The http_get_* functions are actually wrappers around
     2 layers of low-level implementation functions. We have
     to pass these options through individually.

  3. The http_get_strbuf wrapper learned these options, but
     nobody bothered to do so for http_get_file, even though
     it is backed by the same function that does understand
     the options.

Let's consolidate the options into a single struct. For the
common case of the default options, we'll allow callers to
simply pass a NULL for the options struct.

The resulting code is often a few lines longer, but it ends
up being easier to read (and to change as we add new
options, since we do not need to update each call site).

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
This commit is contained in:
Jeff King 2013-09-28 04:31:23 -04:00 committed by Jonathan Nieder
parent 132b70a2ed
commit 1bbcc224cc
4 changed files with 44 additions and 28 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
http-push.c
View File

@ -1543,7 +1543,7 @@ static int remote_exists(const char *path)
sprintf(url, "%s%s", repo->url, path);
switch (http_get_strbuf(url, NULL, NULL, 0)) {
switch (http_get_strbuf(url, NULL, NULL)) {
case HTTP_OK:
ret = 1;
break;
@ -1567,7 +1567,7 @@ static void fetch_symref(const char *path, char **symref, unsigned char *sha1)
url = xmalloc(strlen(repo->url) + strlen(path) + 1);
sprintf(url, "%s%s", repo->url, path);
if (http_get_strbuf(url, NULL, &buffer, 0) != HTTP_OK)
if (http_get_strbuf(url, &buffer, NULL) != HTTP_OK)
die("Couldn't get %s for remote symref\n%s", url,
curl_errorstr);
free(url);

44
http.c
View File

@ -836,8 +836,9 @@ static CURLcode curlinfo_strbuf(CURL *curl, CURLINFO info, struct strbuf *buf)
#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;
@ -870,9 +871,9 @@ 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);
@ -890,8 +891,9 @@ static int http_request(const char *url, struct strbuf *type,
ret = HTTP_START_FAILED;
}
if (type)
curlinfo_strbuf(slot->curl, CURLINFO_CONTENT_TYPE, type);
if (options && options->content_type)
curlinfo_strbuf(slot->curl, CURLINFO_CONTENT_TYPE,
options->content_type);
curl_slist_free_all(headers);
strbuf_release(&buf);
@ -900,11 +902,10 @@ static int http_request(const char *url, struct strbuf *type,
}
static int http_request_reauth(const char *url,
struct strbuf *type,
void *result, int target,
int options)
struct http_get_options *options)
{
int ret = http_request(url, type, result, target, options);
int ret = http_request(url, result, target, options);
if (ret != HTTP_REAUTH)
return ret;
@ -914,7 +915,7 @@ 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);
@ -923,15 +924,14 @@ 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);
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);
}
/*
@ -940,7 +940,8 @@ 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;
@ -954,7 +955,7 @@ static int http_get_file(const char *url, const char *filename, int options)
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))
@ -966,12 +967,15 @@ 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);
@ -1055,6 +1059,7 @@ 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;
@ -1064,7 +1069,8 @@ 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;

15
http.h
View File

@ -125,11 +125,16 @@ extern void append_remote_object_url(struct strbuf *buf, const char *url,
extern char *get_remote_object_url(const char *url, const char *hex,
int only_two_digit_prefix);
/* Options for http_request_*() */
#define HTTP_NO_CACHE 1
#define HTTP_KEEP_ERROR 2
/* Options for http_get_*() */
struct http_get_options {
unsigned no_cache:1,
keep_error:1;
/* Return values for http_request_*() */
/* If non-NULL, returns the content-type of the response. */
struct strbuf *content_type;
};
/* Return values for http_get_*() */
#define HTTP_OK 0
#define HTTP_MISSING_TARGET 1
#define HTTP_ERROR 2
@ -142,7 +147,7 @@ extern char *get_remote_object_url(const char *url, const char *hex,
*
* If the result pointer is NULL, a HTTP HEAD request is made instead of GET.
*/
int http_get_strbuf(const char *url, struct strbuf *content_type, struct strbuf *result, int options);
int http_get_strbuf(const char *url, struct strbuf *result, struct http_get_options *options);
extern int http_fetch_ref(const char *base, struct ref *ref);

9
remote-curl.c
View File

@ -187,6 +187,7 @@ static struct discovery* discover_refs(const char *service, int for_push)
struct discovery *last = last_discovery;
char *refs_url;
int http_ret, maybe_smart = 0;
struct http_get_options options;
if (last && !strcmp(service, last->service))
return last;
@ -204,8 +205,12 @@ static struct discovery* discover_refs(const char *service, int for_push)
}
refs_url = strbuf_detach(&buffer, NULL);
http_ret = http_get_strbuf(refs_url, &type, &buffer,
HTTP_NO_CACHE | HTTP_KEEP_ERROR);
memset(&options, 0, sizeof(options));
options.content_type = &type;
options.no_cache = 1;
options.keep_error = 1;
http_ret = http_get_strbuf(refs_url, &buffer, &options);
switch (http_ret) {
case HTTP_OK:
break;