[PATCH] http-push: refactor request url creation

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Currently, functions that deal with objects on the remote repository
have to allocate and do strcpys to generate the URL.

This patch saves them this trouble, by providing a function that
returns a URL: either the object's 2-digit hex directory (eg.
/objects/a1/) or the complete object location (eg. /objects/a1/b2).

Acked-by: Johannes Schindelin <johannes.schindelin@xxxxxx>
Signed-off-by: Tay Ray Chuan <rctay89@xxxxxxxxx>
---

* renamed only_two_digit_postfix in original patch to only_two_digit_prefix
* rebased and generated on master (5dc1308)

 http-push.c |   58 +++++++++++++++++++---------------------------------------
 1 files changed, 19 insertions(+), 39 deletions(-)

diff --git a/http-push.c b/http-push.c
index eca4a8e..27825f2 100644
--- a/http-push.c
+++ b/http-push.c
@@ -208,6 +208,16 @@ static struct curl_slist
*get_dav_token_headers(struct remote_lock *lock, enum d
 	return dav_headers;
 }

+static char *get_remote_object_url(const char *url, const char *hex,
int only_two_digit_prefix) {
+	struct strbuf buf = STRBUF_INIT;
+
+	strbuf_addf(&buf, "%sobjects/%.*s/", url, 2, hex);
+	if(!only_two_digit_prefix)
+		strbuf_addf(&buf, "%s", hex+2);
+
+	return strbuf_detach(&buf, NULL);
+}
+
 static void finish_request(struct transfer_request *request);
 static void release_request(struct transfer_request *request);

@@ -253,8 +263,6 @@ static void start_fetch_loose(struct
transfer_request *request)
 	char *hex = sha1_to_hex(request->obj->sha1);
 	char *filename;
 	char prevfile[PATH_MAX];
-	char *url;
-	char *posn;
 	int prevlocal;
 	unsigned char prev_buf[PREV_BUF_SIZE];
 	ssize_t prev_read = 0;
@@ -304,17 +312,7 @@ static void start_fetch_loose(struct
transfer_request *request)

 	git_SHA1_Init(&request->c);

-	url = xmalloc(strlen(remote->url) + 50);
-	request->url = xmalloc(strlen(remote->url) + 50);
-	strcpy(url, remote->url);
-	posn = url + strlen(remote->url);
-	strcpy(posn, "objects/");
-	posn += 8;
-	memcpy(posn, hex, 2);
-	posn += 2;
-	*(posn++) = '/';
-	strcpy(posn, hex + 2);
-	strcpy(request->url, url);
+	request->url = get_remote_object_url(remote->url, hex, 0);

 	/* If a previous temp file is present, process what was already
 	   fetched. */
@@ -358,7 +356,7 @@ static void start_fetch_loose(struct
transfer_request *request)
 	curl_easy_setopt(slot->curl, CURLOPT_FILE, request);
 	curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_sha1_file);
 	curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, request->errorstr);
-	curl_easy_setopt(slot->curl, CURLOPT_URL, url);
+	curl_easy_setopt(slot->curl, CURLOPT_URL, request->url);
 	curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);

 	/* If we have successfully processed data from a previous fetch
@@ -387,16 +385,8 @@ static void start_mkcol(struct transfer_request *request)
 {
 	char *hex = sha1_to_hex(request->obj->sha1);
 	struct active_request_slot *slot;
-	char *posn;

-	request->url = xmalloc(strlen(remote->url) + 13);
-	strcpy(request->url, remote->url);
-	posn = request->url + strlen(remote->url);
-	strcpy(posn, "objects/");
-	posn += 8;
-	memcpy(posn, hex, 2);
-	posn += 2;
-	strcpy(posn, "/");
+	request->url = get_remote_object_url(remote->url, hex, 1);

 	slot = get_active_slot();
 	slot->callback_func = process_response;
@@ -511,7 +501,7 @@ static void start_put(struct transfer_request *request)
 {
 	char *hex = sha1_to_hex(request->obj->sha1);
 	struct active_request_slot *slot;
-	char *posn;
+	struct strbuf url_buf = STRBUF_INIT;
 	enum object_type type;
 	char hdr[50];
 	void *unpacked;
@@ -550,21 +540,11 @@ static void start_put(struct transfer_request *request)

 	request->buffer.buf.len = stream.total_out;

-	request->url = xmalloc(strlen(remote->url) +
-			       strlen(request->lock->token) + 51);
-	strcpy(request->url, remote->url);
-	posn = request->url + strlen(remote->url);
-	strcpy(posn, "objects/");
-	posn += 8;
-	memcpy(posn, hex, 2);
-	posn += 2;
-	*(posn++) = '/';
-	strcpy(posn, hex + 2);
-	request->dest = xmalloc(strlen(request->url) + 14);
-	sprintf(request->dest, "Destination: %s", request->url);
-	posn += 38;
-	*(posn++) = '_';
-	strcpy(posn, request->lock->token);
+	strbuf_addf(&url_buf, "Destination: %s",
get_remote_object_url(remote->url, hex, 0));
+	request->dest = strbuf_detach(&url_buf, NULL);
+
+	strbuf_addf(&url_buf, "%s_%s", get_remote_object_url(remote->url,
hex, 0), request->lock->token);
+	request->url = strbuf_detach(&url_buf, NULL);

 	slot = get_active_slot();
 	slot->callback_func = process_response;
-- 
1.6.0.4
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