threads / patch / 1951

patch, 3 partsReturn CURL error message when object transfer fails

Subject: [PATCH 3/3] Return CURL error message when object transfer fails

## tl;dr

6 messages between Sep 26, 2005 and Sep 27, 2005. Diffs are folded; open one to read it.

replies: 5people: 2as markdown or json

Nick Hengeveld· Sep 26, 2005, 17:52 UTC · lore
Return CURL error message when object transfer fails
Signed-off-by: Nick Hengeveld <nickh@reactrix.com>
---

It might be better to extend this to all places that curl_easy_perform is called, rather than just in fetch_object.

 http-fetch.c |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)
330da7634e6a707779dcc8648841f501d2a47568
Show changes to http-fetch.c +3 −1
diff --git a/http-fetch.c b/http-fetch.c
--- a/http-fetch.c
+++ b/http-fetch.c
@@ -19,6 +19,7 @@
 static CURL *curl;
 static struct curl_slist *no_pragma_header;
 static struct curl_slist *no_range_header;
+static char curl_errorstr[CURL_ERROR_SIZE];
 
 static char *initial_base;
 
@@ -389,6 +390,7 @@ int fetch_object(struct alt_base *repo, 
 	curl_easy_setopt(curl, CURLOPT_FILE, NULL);
 	curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, fwrite_sha1_file);
 	curl_easy_setopt(curl, CURLOPT_HTTPHEADER, no_pragma_header);
+	curl_easy_setopt(curl, CURLOPT_ERRORBUFFER, curl_errorstr);
 
 	url = xmalloc(strlen(repo->base) + 50);
 	strcpy(url, repo->base);
@@ -448,7 +450,7 @@ int fetch_object(struct alt_base *repo, 
 	curl_result = curl_easy_perform(curl);
 	curl_easy_setopt(curl, CURLOPT_HTTPHEADER, no_range_header);
 	if (curl_result != 0) {
-		return -1;
+		return error(curl_errorstr);
 	}
 
 	fchmod(local, 0444);
Junio C Hamano· Sep 26, 2005, 21:22 UTC · re: Nick Hengeveld · lore

Re: [PATCH 3/3] Return CURL error message when object transfer fails

Nick Hengeveld <nickh@reactrix.com> writes:
> It might be better to extend this to all places that curl_easy_perform
> is called, rather than just in fetch_object.

Sounds like a good idea. Also if you happen to know if this option is not available in older versions of the library, it might not hurt to guard it with "#if LIBCURL_VERSION_NUM" like we do with other options.

Nick Hengeveld· Sep 27, 2005, 00:12 UTC · re: Junio C Hamano · lore

Re: [PATCH 3/3] Return CURL error message when object transfer fails

On Mon, Sep 26, 2005 at 02:22:56PM -0700, Junio C Hamano wrote:
> Sounds like a good idea.  Also if you happen to know if this
> option is not available in older versions of the library, it
> might not hurt to guard it with "#if LIBCURL_VERSION_NUM" like
> we do with other options.

I don't see any indication that CURLOPT_ERRORBUFFER is a new feature. The curl_easy_strerror() function is new as of 7.12.0 which is why I elected to use the CURLOPT_ERRORBUFFER option instead.

-- 
For a successful technology, reality must take precedence over public
relations, for nature cannot be fooled.
Junio C Hamano· Sep 27, 2005, 05:51 UTC · re: Nick Hengeveld · lore

Re: [PATCH 3/3] Return CURL error message when object transfer fails

Nick Hengeveld <nickh@reactrix.com> writes:
> I don't see any indication that CURLOPT_ERRORBUFFER is a new feature.
> The curl_easy_strerror() function is new as of 7.12.0 which is why
> I elected to use the CURLOPT_ERRORBUFFER option instead.
If that is the case, I'll take your patch verbatim.  Thanks.

I just needed to get the feel that you did things that way, knowing what to and what not to worry about; I am no cURL expert.

Junio C Hamano· Sep 27, 2005, 06:13 UTC · re: Junio C Hamano · lore

Re: [PATCH 3/3] Return CURL error message when object transfer fails

Junio C Hamano <junkio@cox.net> writes:
> If that is the case, I'll take your patch verbatim.  Thanks.

Oops. I spoke too fast. That "sounds like a good idea" of mine was a response to your:

> It might be better to extend this to all places that curl_easy_perform
> is called, rather than just in fetch_object.

... so the patch still needed some fixups. It had minor dependencies on the previous patches in the series as well, so I tried to fix them up myself.

Could you take a look at it and see if the following is good enough, please?

------------
Subject: [PATCH] Return CURL error message when object transfer fails
From: Nick Hengeveld <nickh@reactrix.com>
Date: 1127757131 -0700
Return CURL error message when object transfer fails
[jc: added similar curl_errorstr errors to places where we
 use curl_easy_perform() to run fetch that _must_ succeed.]
Signed-off-by: Nick Hengeveld <nickh@reactrix.com>
Signed-off-by: Junio C Hamano <junkio@cox.net>
---
 http-fetch.c |   24 ++++++++++++++++--------
 1 files changed, 16 insertions(+), 8 deletions(-)
4f1da6322aa5d11091005b23716bcc3c65151a32
Show changes to http-fetch.c +16 −8
diff --git a/http-fetch.c b/http-fetch.c
--- a/http-fetch.c
+++ b/http-fetch.c
@@ -15,6 +15,7 @@
 
 static CURL *curl;
 static struct curl_slist *no_pragma_header;
+static char curl_errorstr[CURL_ERROR_SIZE];
 
 static char *initial_base;
 
@@ -112,10 +113,12 @@ static int fetch_index(struct alt_base *
 	curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, fwrite);
 	curl_easy_setopt(curl, CURLOPT_URL, url);
 	curl_easy_setopt(curl, CURLOPT_HTTPHEADER, no_pragma_header);
+	curl_easy_setopt(curl, CURLOPT_ERRORBUFFER, curl_errorstr);
 	
 	if (curl_easy_perform(curl)) {
 		fclose(indexfile);
-		return error("Unable to get pack index %s", url);
+		return error("Unable to get pack index %s\n%s", url,
+			     curl_errorstr);
 	}
 
 	fclose(indexfile);
@@ -264,10 +267,10 @@ static int fetch_indices(struct alt_base
 	curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
 	curl_easy_setopt(curl, CURLOPT_URL, url);
 	curl_easy_setopt(curl, CURLOPT_HTTPHEADER, NULL);
+	curl_easy_setopt(curl, CURLOPT_ERRORBUFFER, curl_errorstr);
 	
-	if (curl_easy_perform(curl)) {
-		return -1;
-	}
+	if (curl_easy_perform(curl))
+		return error("%s", curl_errorstr);
 
 	while (i < buffer.posn) {
 		switch (data[i]) {
@@ -327,10 +330,12 @@ static int fetch_pack(struct alt_base *r
 	curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, fwrite);
 	curl_easy_setopt(curl, CURLOPT_URL, url);
 	curl_easy_setopt(curl, CURLOPT_HTTPHEADER, no_pragma_header);
-	
+	curl_easy_setopt(curl, CURLOPT_ERRORBUFFER, curl_errorstr);
+
 	if (curl_easy_perform(curl)) {
 		fclose(packfile);
-		return error("Unable to get pack file %s", url);
+		return error("Unable to get pack file %s\n%s", url,
+			     curl_errorstr);
 	}
 
 	fclose(packfile);
@@ -373,6 +378,7 @@ int fetch_object(struct alt_base *repo, 
 	curl_easy_setopt(curl, CURLOPT_FILE, NULL);
 	curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, fwrite_sha1_file);
 	curl_easy_setopt(curl, CURLOPT_HTTPHEADER, no_pragma_header);
+	curl_easy_setopt(curl, CURLOPT_ERRORBUFFER, curl_errorstr);
 
 	url = xmalloc(strlen(repo->base) + 50);
 	strcpy(url, repo->base);
@@ -388,7 +394,7 @@ int fetch_object(struct alt_base *repo, 
 
 	if (curl_easy_perform(curl)) {
 		unlink(filename);
-		return -1;
+		return error("%s", curl_errorstr);
 	}
 
 	fchmod(local, 0444);
@@ -453,6 +459,7 @@ int fetch_ref(char *ref, unsigned char *
         curl_easy_setopt(curl, CURLOPT_FILE, &buffer);
         curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
 	curl_easy_setopt(curl, CURLOPT_HTTPHEADER, NULL);
+	curl_easy_setopt(curl, CURLOPT_ERRORBUFFER, curl_errorstr);
 
         url = xmalloc(strlen(base) + 6 + strlen(ref));
         strcpy(url, base);
@@ -464,7 +471,8 @@ int fetch_ref(char *ref, unsigned char *
         curl_easy_setopt(curl, CURLOPT_URL, url);
 
         if (curl_easy_perform(curl))
-                return error("Couldn't get %s for %s\n", url, ref);
+                return error("Couldn't get %s for %s\n%s",
+			     url, ref, curl_errorstr);
 
         hex[40] = '\0';
         get_sha1_hex(hex, sha1);
Nick Hengeveld· Sep 27, 2005, 16:07 UTC · re: Junio C Hamano · lore

Re: [PATCH 3/3] Return CURL error message when object transfer fails

On Mon, Sep 26, 2005 at 11:13:14PM -0700, Junio C Hamano wrote:
Show 6 quoted lines
> ... so the patch still needed some fixups.  It had minor
> dependencies on the previous patches in the series as well, so I
> tried to fix them up myself.
> 
> Could you take a look at it and see if the following is good
> enough, please?
Looks great, thanks.
Show 12 quoted lines
> ------------
> Subject: [PATCH] Return CURL error message when object transfer fails
> From: Nick Hengeveld <nickh@reactrix.com>
> Date: 1127757131 -0700
> 
> Return CURL error message when object transfer fails
> 
> [jc: added similar curl_errorstr errors to places where we
>  use curl_easy_perform() to run fetch that _must_ succeed.]
> 
> Signed-off-by: Nick Hengeveld <nickh@reactrix.com>
> Signed-off-by: Junio C Hamano <junkio@cox.net>
-- 
For a successful technology, reality must take precedence over public
relations, for nature cannot be fooled.

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