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Improve JSON-RPC result/error checking, and improve error diagnostic output.

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This commit is contained in:
Jeff Garzik 2010-12-28 15:22:53 -05:00 committed by Jeff Garzik
parent 872211caad
commit 9e5a173c38
1 changed files with 24 additions and 2 deletions
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26
util.c
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@ -83,7 +83,7 @@ static size_t upload_data_cb(void *ptr, size_t size, size_t nmemb,
json_t *json_rpc_call(const char *url, const char *userpass, const char *rpc_req)
{
CURL *curl;
json_t *val;
json_t *val, *err_val, *res_val;
int rc;
struct data_buffer all_data = { };
struct upload_buffer upload_data;
@ -132,7 +132,7 @@ json_t *json_rpc_call(const char *url, const char *userpass, const char *rpc_req
val = json_loads(all_data.buf, &err);
if (!val) {
fprintf(stderr, "JSON failed(%d): %s\n", err.line, err.text);
fprintf(stderr, "JSON decode failed(%d): %s\n", err.line, err.text);
goto err_out;
}
@ -142,6 +142,28 @@ json_t *json_rpc_call(const char *url, const char *userpass, const char *rpc_req
free(s);
}
/* JSON-RPC valid response returns a non-null 'result',
* and a null 'error'.
*/
res_val = json_object_get(val, "result");
err_val = json_object_get(val, "error");
if (!res_val || json_is_null(res_val) ||
(err_val && !json_is_null(err_val))) {
char *s;
if (err_val)
s = json_dumps(err_val, JSON_INDENT(3));
else
s = strdup("(unknown reason)");
fprintf(stderr, "JSON-RPC call failed: %s\n", s);
free(s);
goto err_out;
}
databuf_free(&all_data);
curl_slist_free_all(headers);
curl_easy_cleanup(curl);