Slightly improve http_download related allocations.

* use `calloc()` to allocate zero-initialized structs.
* order the allocation of members by their declaration.
* order the freeing of members in reverse order.
* move init of `silent` flag in plugin case.
* fix double free of `tmpname` in `aesgcm_file_get()`.
* make some functions static.

Signed-off-by: Steffen Jaeckel <s@jaeckel.eu>

src/tools/aesgcm_download.c

@@ -77,7 +77,7 @@ aesgcm_file_get(void* userdata)
 
     // Create a temporary file used for storing the ciphertext that is to be
     // retrieved from the https:// URL.
-    auto_gchar char* tmpname = NULL;
+    auto_gchar gchar* tmpname = NULL;
     auto_gfd gint tmpfd = 0;
     if ((tmpfd = g_file_open_tmp("profanity.XXXXXX", &tmpname, NULL)) == -1) {
         http_print_transfer_update(aesgcm_dl->window, aesgcm_dl->id,
@@ -101,7 +101,7 @@ aesgcm_file_get(void* userdata)
 
     // We wrap the HTTPDownload tool and use it for retrieving the ciphertext
     // and storing it in the temporary file previously opened.
-    HTTPDownload* http_dl = malloc(sizeof(HTTPDownload));
+    HTTPDownload* http_dl = calloc(1, sizeof(HTTPDownload));
     http_dl->window = aesgcm_dl->window;
     http_dl->worker = aesgcm_dl->worker;
     http_dl->id = strdup(aesgcm_dl->id);
@@ -128,7 +128,6 @@ aesgcm_file_get(void* userdata)
                                    http_dl->bytes_received, fragment);
 
     remove(tmpname);
-    g_free(tmpname);
 
     if (crypt_res != GPG_ERR_NO_ERROR) {
         http_print_transfer_update(aesgcm_dl->window, aesgcm_dl->id,

src/tools/http_download.c

@@ -236,9 +236,9 @@ out:
     download_processes = g_slist_remove(download_processes, download);
     pthread_mutex_unlock(&lock);
 
-    free(download->id);
-    free(download->url);
     free(download->filename);
+    free(download->url);
+    free(download->id);
     free(download);
 
     return NULL;

src/tools/plugin_download.c

@@ -62,9 +62,9 @@ plugin_download_install(void* userdata)
 {
     HTTPDownload* plugin_dl = (HTTPDownload*)userdata;
 
+    /* We need to dup those, because they're free'd inside `http_file_get()` */
     auto_char char* path = strdup(plugin_dl->filename);
     auto_char char* https_url = strdup(plugin_dl->url);
-    plugin_dl->silent = TRUE;
 
     http_file_get(plugin_dl);