tests/test_http_media_cache: Add unit tests for res_http_media_cache

This patch adds unit tests for res_http_media cache, that covers nominal
creation and retrieval - and through them as well, staleness and deletion
checks. In addition, this patch adds tests that covers the interaction of
various HTTP headers, including Expires, Etag, and Cache-Control.

ASTERISK-25654

Change-Id: I2db101e307c863857fe416d6f5bf4cace9ac7cf5

1 files changed, 702 insertions, 0 deletions

diff --git a/tests/test_http_media_cache.c b/tests/test_http_media_cache.c
new file mode 100644
index 000000000..6a57433cb
--- /dev/null
+++ b/tests/test_http_media_cache.c
@@ -0,0 +1,702 @@
+/*
+ * Asterisk -- An open source telephony toolkit.
+ *
+ * Copyright (C) 2015, Matt Jordan
+ *
+ * Matt Jordan <mjordan@digium.com>
+ *
+ * See http://www.asterisk.org for more information about
+ * the Asterisk project. Please do not directly contact
+ * any of the maintainers of this project for assistance;
+ * the project provides a web site, mailing lists and IRC
+ * channels for your use.
+ *
+ * This program is free software, distributed under the terms of
+ * the GNU General Public License Version 2. See the LICENSE file
+ * at the top of the source tree.
+ */
+
+/*!
+ * \file
+ * \brief Tests for the HTTP media cache backend
+ *
+ * \author \verbatim Matt Jordan <mjordan@digium.com> \endverbatim
+ *
+ * \ingroup tests
+ */
+
+/*** MODULEINFO
+	<depend>TEST_FRAMEWORK</depend>
+	<depend>curl</depend>
+	<depend>res_http_media_cache</depend>
+	<support_level>core</support_level>
+ ***/
+
+#include "asterisk.h"
+
+ASTERISK_REGISTER_FILE()
+
+#include <fcntl.h>
+
+#include "asterisk/module.h"
+#include "asterisk/http.h"
+#include "asterisk/bucket.h"
+#include "asterisk/test.h"
+
+#define CATEGORY "/res/http_media_cache/"
+
+#define TEST_URI "test_media_cache"
+
+struct test_options {
+	int status_code;
+	int send_file;
+	struct {
+		int s_maxage;
+		int maxage;
+		int no_cache;
+		int must_revalidate;
+	} cache_control;
+	struct timeval expires;
+	const char *status_text;
+	const char *etag;
+};
+
+static struct test_options options;
+
+static char server_uri[512];
+
+#define VALIDATE_EXPIRES(test, bucket_file, expected, delta) do { \
+	RAII_VAR(struct ast_bucket_metadata *, metadata, ast_bucket_file_metadata_get((bucket_file), "__actual_expires"), ao2_cleanup); \
+	int actual_expires; \
+	ast_test_validate(test, metadata != NULL); \
+	ast_test_validate(test, sscanf(metadata->value, "%d", &actual_expires) == 1); \
+	ast_test_validate(test, (((expected) + (delta) > actual_expires) && ((expected) - (delta) < actual_expires))); \
+} while (0)
+
+#define VALIDATE_STR_METADATA(test, bucket_file, key, expected) do { \
+	RAII_VAR(struct ast_bucket_metadata *, metadata, ast_bucket_file_metadata_get((bucket_file), (key)), ao2_cleanup); \
+	ast_test_validate(test, metadata != NULL); \
+	ast_test_validate(test, !strcmp(metadata->value, (expected))); \
+} while (0)
+
+#define SET_OR_APPEND_CACHE_CONTROL(str) do { \
+	if (!ast_str_strlen((str))) { \
+		ast_str_set(&(str), 0, "%s", "cache-control: "); \
+	} else { \
+		ast_str_append(&(str), 0, "%s", ", "); \
+	} \
+} while (0)
+
+static int http_callback(struct ast_tcptls_session_instance *ser, const struct ast_http_uri *urih, const char *uri, enum ast_http_method method, struct ast_variable *get_params, struct ast_variable *headers)
+{
+	char file_name[64] = "/tmp/test-media-cache-XXXXXX";
+	struct ast_str *http_header = ast_str_create(128);
+	struct ast_str *cache_control = ast_str_create(128);
+	int fd = -1;
+	int unmodified = 0;
+	int send_file = options.send_file && method == AST_HTTP_GET;
+
+	if (!http_header) {
+		goto error;
+	}
+
+	if (send_file) {
+		char buf[1024];
+
+		fd = mkstemp(file_name);
+		if (fd == -1) {
+			ast_log(LOG_ERROR, "Unable to open temp file for testing: %s (%d)", strerror(errno), errno);
+			goto error;
+		}
+
+		memset(buf, 1, sizeof(buf));
+		if (write(fd, buf, sizeof(buf)) != sizeof(buf)) {
+			ast_log(LOG_ERROR, "Failed to write expected number of bytes to pipe\n");
+			close(fd);
+			goto error;
+		}
+		close(fd);
+
+		fd = open(file_name, 0);
+		if (fd == -1) {
+			ast_log(LOG_ERROR, "Unable to open temp file for testing: %s (%d)", strerror(errno), errno);
+			goto error;
+		}
+	}
+
+	if (options.cache_control.maxage) {
+		SET_OR_APPEND_CACHE_CONTROL(cache_control);
+		ast_str_append(&cache_control, 0, "max-age=%d", options.cache_control.maxage);
+	}
+
+	if (options.cache_control.s_maxage) {
+		SET_OR_APPEND_CACHE_CONTROL(cache_control);
+		ast_str_append(&cache_control, 0, "s-maxage=%d", options.cache_control.s_maxage);
+	}
+
+	if (options.cache_control.no_cache) {
+		SET_OR_APPEND_CACHE_CONTROL(cache_control);
+		ast_str_append(&cache_control, 0, "%s", "no-cache");
+	}
+
+	if (options.cache_control.must_revalidate) {
+		SET_OR_APPEND_CACHE_CONTROL(cache_control);
+		ast_str_append(&cache_control, 0, "%s", "must-revalidate");
+	}
+
+	if (ast_str_strlen(cache_control)) {
+		ast_str_append(&http_header, 0, "%s\r\n", ast_str_buffer(cache_control));
+	}
+
+	if (options.expires.tv_sec) {
+		struct ast_tm now_time;
+		char tmbuf[64];
+
+		ast_localtime(&options.expires, &now_time, NULL);
+		ast_strftime(tmbuf, sizeof(tmbuf), "%a, %d %b %Y %T %z", &now_time);
+		ast_str_append(&http_header, 0, "Expires: %s\r\n", tmbuf);
+	}
+
+	if (!ast_strlen_zero(options.etag)) {
+		struct ast_variable *v;
+
+		ast_str_append(&http_header, 0, "ETag: %s\r\n", options.etag);
+		for (v = headers; v; v = v->next) {
+			if (!strcasecmp(v->name, "If-None-Match") && !strcasecmp(v->value, options.etag)) {
+				unmodified = 1;
+				break;
+			}
+		}
+	}
+
+	if (!unmodified) {
+		ast_http_send(ser, method, options.status_code, options.status_text, http_header, NULL, send_file ? fd : 0, 1);
+	} else {
+		ast_http_send(ser, method, 304, "Not Modified", http_header, NULL, 0, 1);
+		if (send_file) {
+			close(fd);
+		}
+	}
+
+	if (send_file) {
+		unlink(file_name);
+	}
+
+	ast_free(cache_control);
+
+	return 0;
+
+error:
+	ast_free(http_header);
+	ast_free(cache_control);
+	ast_http_request_close_on_completion(ser);
+	ast_http_error(ser, 418, "I'm a Teapot", "Please don't ask me to brew coffee.");
+
+	return 0;
+}
+
+static struct ast_http_uri test_uri = {
+	.description = "HTTP Media Cache Test URI",
+	.uri = TEST_URI,
+	.callback = http_callback,
+	.has_subtree = 1,
+	.data = NULL,
+	.key = __FILE__,
+};
+
+static int pre_test_cb(struct ast_test_info *info, struct ast_test *test)
+{
+	memset(&options, 0, sizeof(options));
+
+	return 0;
+}
+
+static void bucket_file_cleanup(void *obj)
+{
+	struct ast_bucket_file *bucket_file = obj;
+
+	if (bucket_file) {
+		ast_bucket_file_delete(bucket_file);
+		ao2_ref(bucket_file, -1);
+	}
+}
+
+AST_TEST_DEFINE(retrieve_cache_control_directives)
+{
+	RAII_VAR(struct ast_bucket_file *, bucket_file, NULL, bucket_file_cleanup);
+	struct timeval now = ast_tvnow();
+	char uri[1024];
+
+	switch (cmd) {
+	case TEST_INIT:
+		info->name = __func__;
+		info->category = CATEGORY;
+		info->summary = "Test retrieval of a resource with Cache-Control directives that affect staleness";
+		info->description =
+			"This test covers retrieval of a resource with the Cache-Control header,\n"
+			"which specifies no-cache and/or must-revalidate.";
+		return AST_TEST_NOT_RUN;
+	case TEST_EXECUTE:
+		break;
+	}
+
+	snprintf(uri, sizeof(uri), "%s/%s", server_uri, "foo.wav");
+
+	options.send_file = 1;
+	options.status_code = 200;
+	options.status_text = "OK";
+
+	ast_test_status_update(test, "Testing no-cache...\n");
+	options.cache_control.no_cache = 1;
+	bucket_file = ast_bucket_file_retrieve(uri);
+	ast_test_validate(test, bucket_file != NULL);
+	ast_test_validate(test, ast_bucket_file_is_stale(bucket_file) == 1);
+	bucket_file_cleanup(bucket_file);
+
+	ast_test_status_update(test, "Testing no-cache with ETag...\n");
+	options.cache_control.no_cache = 1;
+	options.etag = "123456789";
+	bucket_file = ast_bucket_file_retrieve(uri);
+	ast_test_validate(test, bucket_file != NULL);
+	ast_test_validate(test, ast_bucket_file_is_stale(bucket_file) == 0);
+	bucket_file_cleanup(bucket_file);
+
+	options.etag = NULL;
+
+	ast_test_status_update(test, "Testing no-cache with max-age...\n");
+	options.cache_control.no_cache = 1;
+	options.cache_control.maxage = 300;
+	bucket_file = ast_bucket_file_retrieve(uri);
+	ast_test_validate(test, bucket_file != NULL);
+	VALIDATE_EXPIRES(test, bucket_file, now.tv_sec + 300, 1);
+	ast_test_validate(test, ast_bucket_file_is_stale(bucket_file) == 1);
+	bucket_file_cleanup(bucket_file);
+
+	options.cache_control.maxage = 0;
+	options.cache_control.no_cache = 0;
+
+	ast_test_status_update(test, "Testing must-revalidate...\n");
+	options.cache_control.must_revalidate = 1;
+	bucket_file = ast_bucket_file_retrieve(uri);
+	ast_test_validate(test, bucket_file != NULL);
+	ast_test_validate(test, ast_bucket_file_is_stale(bucket_file) == 1);
+	bucket_file_cleanup(bucket_file);
+
+	ast_test_status_update(test, "Testing must-revalidate with ETag...\n");
+	options.cache_control.must_revalidate = 1;
+	options.etag = "123456789";
+	bucket_file = ast_bucket_file_retrieve(uri);
+	ast_test_validate(test, bucket_file != NULL);
+	ast_test_validate(test, ast_bucket_file_is_stale(bucket_file) == 0);
+	bucket_file_cleanup(bucket_file);
+
+	options.etag = NULL;
+
+	ast_test_status_update(test, "Testing must-revalidate with max-age...\n");
+	options.cache_control.must_revalidate = 1;
+	options.cache_control.maxage = 300;
+	bucket_file = ast_bucket_file_retrieve(uri);
+	ast_test_validate(test, bucket_file != NULL);
+	VALIDATE_EXPIRES(test, bucket_file, now.tv_sec + 300, 1);
+	ast_test_validate(test, ast_bucket_file_is_stale(bucket_file) == 1);
+
+	return AST_TEST_PASS;
+}
+
+AST_TEST_DEFINE(retrieve_cache_control_age)
+{
+	RAII_VAR(struct ast_bucket_file *, bucket_file, NULL, bucket_file_cleanup);
+	struct timeval now = ast_tvnow();
+	char uri[1024];
+
+	switch (cmd) {
+	case TEST_INIT:
+		info->name = __func__;
+		info->category = CATEGORY;
+		info->summary = "Test retrieval of a resource with age specifiers in Cache-Control";
+		info->description =
+			"This test covers retrieval of a resource with the Cache-Control header,\n"
+			"which specifies max-age and/or s-maxage. The test verifies proper precedence\n"
+			"ordering of the header attributes, along with its relation if the Expires\n"
+			"header is present.";
+		return AST_TEST_NOT_RUN;
+	case TEST_EXECUTE:
+		break;
+	}
+
+	snprintf(uri, sizeof(uri), "%s/%s", server_uri, "foo.wav");
+
+	options.send_file = 1;
+	options.status_code = 200;
+	options.status_text = "OK";
+
+	ast_test_status_update(test, "Testing max-age...\n");
+	options.cache_control.maxage = 300;
+	bucket_file = ast_bucket_file_retrieve(uri);
+	ast_test_validate(test, bucket_file != NULL);
+	VALIDATE_EXPIRES(test, bucket_file, now.tv_sec + 300, 1);
+	ast_test_validate(test, ast_bucket_file_is_stale(bucket_file) == 0);
+	bucket_file_cleanup(bucket_file);
+
+	ast_test_status_update(test, "Testing s-maxage...\n");
+	now = ast_tvnow();
+	options.cache_control.maxage = 0;
+	options.cache_control.s_maxage = 300;
+	bucket_file = ast_bucket_file_retrieve(uri);
+	ast_test_validate(test, bucket_file != NULL);
+	VALIDATE_EXPIRES(test, bucket_file, now.tv_sec + 300, 1);
+	ast_test_validate(test, ast_bucket_file_is_stale(bucket_file) == 0);
+	bucket_file_cleanup(bucket_file);
+
+	ast_test_status_update(test, "Testing max-age and s-maxage...\n");
+	now = ast_tvnow();
+	options.cache_control.maxage = 300;
+	options.cache_control.s_maxage = 600;
+	bucket_file = ast_bucket_file_retrieve(uri);
+	ast_test_validate(test, bucket_file != NULL);
+	VALIDATE_EXPIRES(test, bucket_file, now.tv_sec + 600, 1);
+	ast_test_validate(test, ast_bucket_file_is_stale(bucket_file) == 0);
+	bucket_file_cleanup(bucket_file);
+
+	ast_test_status_update(test, "Testing max-age and Expires...\n");
+	now = ast_tvnow();
+	options.cache_control.maxage = 300;
+	options.cache_control.s_maxage = 0;
+	options.expires.tv_sec = now.tv_sec + 3000;
+	bucket_file = ast_bucket_file_retrieve(uri);
+	ast_test_validate(test, bucket_file != NULL);
+	VALIDATE_EXPIRES(test, bucket_file, now.tv_sec + 300, 1);
+	ast_test_validate(test, ast_bucket_file_is_stale(bucket_file) == 0);
+	bucket_file_cleanup(bucket_file);
+
+	ast_test_status_update(test, "Testing s-maxage and Expires...\n");
+	now = ast_tvnow();
+	options.cache_control.maxage = 0;
+	options.cache_control.s_maxage = 300;
+	options.expires.tv_sec = now.tv_sec + 3000;
+	bucket_file = ast_bucket_file_retrieve(uri);
+	ast_test_validate(test, bucket_file != NULL);
+	VALIDATE_EXPIRES(test, bucket_file, now.tv_sec + 300, 1);
+	ast_test_validate(test, ast_bucket_file_is_stale(bucket_file) == 0);
+	bucket_file_cleanup(bucket_file);
+
+	ast_test_status_update(test, "Testing s-maxage and Expires...\n");
+	now = ast_tvnow();
+	options.cache_control.maxage = 0;
+	options.cache_control.s_maxage = 300;
+	options.expires.tv_sec = now.tv_sec + 3000;
+	bucket_file = ast_bucket_file_retrieve(uri);
+	ast_test_validate(test, bucket_file != NULL);
+	VALIDATE_EXPIRES(test, bucket_file, now.tv_sec + 300, 1);
+	ast_test_validate(test, ast_bucket_file_is_stale(bucket_file) == 0);
+	bucket_file_cleanup(bucket_file);
+
+	ast_test_status_update(test, "Testing max-age, s-maxage, and Expires...\n");
+	now = ast_tvnow();
+	options.cache_control.maxage = 300;
+	options.cache_control.s_maxage = 600;
+	options.expires.tv_sec = now.tv_sec + 3000;
+	bucket_file = ast_bucket_file_retrieve(uri);
+	ast_test_validate(test, bucket_file != NULL);
+	VALIDATE_EXPIRES(test, bucket_file, now.tv_sec + 600, 1);
+	ast_test_validate(test, ast_bucket_file_is_stale(bucket_file) == 0);
+
+	return AST_TEST_PASS;
+}
+
+AST_TEST_DEFINE(retrieve_etag_expired)
+{
+	RAII_VAR(struct ast_bucket_file *, bucket_file, NULL, bucket_file_cleanup);
+	struct timeval now = ast_tvnow();
+	char uri[1024];
+
+	switch (cmd) {
+	case TEST_INIT:
+		info->name = __func__;
+		info->category = CATEGORY;
+		info->summary = "Test retrieval of an expired resource with an ETag";
+		info->description =
+			"This test covers a staleness check of a resource with an ETag\n"
+			"that has also expired. It guarantees that even if a resource\n"
+			"is expired, we will still not consider it stale if the resource\n"
+			"has not changed per the ETag value.";
+		return AST_TEST_NOT_RUN;
+	case TEST_EXECUTE:
+		break;
+	}
+
+	options.send_file = 1;
+	options.status_code = 200;
+	options.status_text = "OK";
+	options.etag = "123456789";
+	options.expires.tv_sec = now.tv_sec - 1;
+
+	snprintf(uri, sizeof(uri), "%s/%s", server_uri, "foo.wav");
+
+	bucket_file = ast_bucket_file_retrieve(uri);
+	ast_test_validate(test, bucket_file != NULL);
+	ast_test_validate(test, !strcmp(uri, ast_sorcery_object_get_id(bucket_file)));
+	ast_test_validate(test, !ast_strlen_zero(bucket_file->path));
+	VALIDATE_STR_METADATA(test, bucket_file, "etag", options.etag);
+	VALIDATE_EXPIRES(test, bucket_file, now.tv_sec - 1, 1);
+
+	ast_test_validate(test, ast_bucket_file_is_stale(bucket_file) == 0);
+
+	return AST_TEST_PASS;
+}
+
+AST_TEST_DEFINE(retrieve_expires)
+{
+	RAII_VAR(struct ast_bucket_file *, bucket_file, NULL, bucket_file_cleanup);
+	struct timeval now = ast_tvnow();
+	char uri[1024];
+
+	switch (cmd) {
+	case TEST_INIT:
+		info->name = __func__;
+		info->category = CATEGORY;
+		info->summary = "Test retrieval with explicit expiration";
+		info->description =
+			"This test covers retrieving a resource that has an Expires.\n"
+			"After retrieval of the resource, staleness is checked. With\n"
+			"a non-expired resource, we expect the resource to not be stale.\n"
+			"When the expiration has occurred, we expect the staleness check\n"
+			"to fail.";
+		return AST_TEST_NOT_RUN;
+	case TEST_EXECUTE:
+		break;
+	}
+
+	options.send_file = 1;
+	options.status_code = 200;
+	options.status_text = "OK";
+	options.expires.tv_sec = now.tv_sec + 3000;
+
+	snprintf(uri, sizeof(uri), "%s/%s", server_uri, "foo.wav");
+
+	bucket_file = ast_bucket_file_retrieve(uri);
+	ast_test_validate(test, bucket_file != NULL);
+	ast_test_validate(test, !strcmp(uri, ast_sorcery_object_get_id(bucket_file)));
+	ast_test_validate(test, !ast_strlen_zero(bucket_file->path));
+	VALIDATE_EXPIRES(test, bucket_file, now.tv_sec + 3000, 1);
+
+	ast_test_validate(test, ast_bucket_file_is_stale(bucket_file) == 0);
+
+	/* Clean up previous result */
+	bucket_file_cleanup(bucket_file);
+
+	options.expires.tv_sec = now.tv_sec - 1;
+	bucket_file = ast_bucket_file_retrieve(uri);
+	ast_test_validate(test, bucket_file != NULL);
+	VALIDATE_EXPIRES(test, bucket_file, now.tv_sec - 1, 1);
+
+	ast_test_validate(test, ast_bucket_file_is_stale(bucket_file) == 1);
+
+	return AST_TEST_PASS;
+}
+
+AST_TEST_DEFINE(retrieve_etag)
+{
+	RAII_VAR(struct ast_bucket_file *, bucket_file, NULL, bucket_file_cleanup);
+	struct timeval now = ast_tvnow();
+	char uri[1024];
+
+	switch (cmd) {
+	case TEST_INIT:
+		info->name = __func__;
+		info->category = CATEGORY;
+		info->summary = "Test retrieval with an ETag";
+		info->description =
+			"This test covers retrieving a resource that has an ETag.\n"
+			"After retrieval of the resource, staleness is checked. With\n"
+			"matching ETags, we expect the resource to not be stale. When\n"
+			"the ETag does not match, we expect the resource to be stale.";
+		return AST_TEST_NOT_RUN;
+	case TEST_EXECUTE:
+		break;
+	}
+
+	options.send_file = 1;
+	options.status_code = 200;
+	options.status_text = "OK";
+	options.etag = "123456789";
+
+	snprintf(uri, sizeof(uri), "%s/%s", server_uri, "foo.wav");
+
+	bucket_file = ast_bucket_file_retrieve(uri);
+	ast_test_validate(test, bucket_file != NULL);
+	ast_test_validate(test, !strcmp(uri, ast_sorcery_object_get_id(bucket_file)));
+	ast_test_validate(test, !ast_strlen_zero(bucket_file->path));
+	VALIDATE_STR_METADATA(test, bucket_file, "etag", options.etag);
+	VALIDATE_EXPIRES(test, bucket_file, now.tv_sec, 1);
+
+	ast_test_validate(test, ast_bucket_file_is_stale(bucket_file) == 0);
+
+	options.etag = "99999999";
+	ast_test_validate(test, ast_bucket_file_is_stale(bucket_file) == 1);
+
+	return AST_TEST_PASS;
+}
+
+AST_TEST_DEFINE(retrieve_nominal)
+{
+	RAII_VAR(struct ast_bucket_file *, bucket_file, NULL, bucket_file_cleanup);
+	struct timeval now = ast_tvnow();
+	char uri[1024];
+
+	switch (cmd) {
+	case TEST_INIT:
+		info->name = __func__;
+		info->category = CATEGORY;
+		info->summary = "Test nominal retrieval";
+		info->description =
+			"Test nominal retrieval of a resource.";
+		return AST_TEST_NOT_RUN;
+	case TEST_EXECUTE:
+		break;
+	}
+
+	options.send_file = 1;
+	options.status_code = 200;
+	options.status_text = "OK";
+
+	snprintf(uri, sizeof(uri), "%s/%s", server_uri, "foo.wav");
+
+	bucket_file = ast_bucket_file_retrieve(uri);
+	ast_test_validate(test, bucket_file != NULL);
+	ast_test_validate(test, !strcmp(uri, ast_sorcery_object_get_id(bucket_file)));
+	ast_test_validate(test, !ast_strlen_zero(bucket_file->path));
+	VALIDATE_EXPIRES(test, bucket_file, now.tv_sec, 1);
+
+	return AST_TEST_PASS;
+}
+
+AST_TEST_DEFINE(create_nominal)
+{
+	RAII_VAR(struct ast_bucket_file *, bucket_file, NULL, bucket_file_cleanup);
+	struct timeval now = ast_tvnow();
+	char uri[1024];
+
+	switch (cmd) {
+	case TEST_INIT:
+		info->name = __func__;
+		info->category = CATEGORY;
+		info->summary = "Test nominal creation";
+		info->description =
+			"Test nominal creation of a resource.";
+		return AST_TEST_NOT_RUN;
+	case TEST_EXECUTE:
+		break;
+	}
+
+	options.send_file = 1;
+	options.status_code = 200;
+	options.status_text = "OK";
+
+	snprintf(uri, sizeof(uri), "%s/%s", server_uri, "foo.wav");
+
+	bucket_file = ast_bucket_file_alloc(uri);
+	ast_test_validate(test, bucket_file != NULL);
+	ast_test_validate(test, ast_bucket_file_temporary_create(bucket_file) == 0);
+	ast_test_validate(test, ast_bucket_file_create(bucket_file) == 0);
+	VALIDATE_EXPIRES(test, bucket_file, now.tv_sec, 1);
+
+	return AST_TEST_PASS;
+}
+
+
+static int process_config(int reload)
+{
+	struct ast_config *config;
+	struct ast_flags config_flags = { reload ? CONFIG_FLAG_FILEUNCHANGED : 0 };
+	const char *bindaddr;
+	const char *bindport;
+	const char *prefix;
+	const char *enabled;
+
+	config = ast_config_load("http.conf", config_flags);
+	if (!config || config == CONFIG_STATUS_FILEINVALID) {
+		return -1;
+	} else if (config == CONFIG_STATUS_FILEUNCHANGED) {
+		return 0;
+	}
+
+	enabled = ast_config_option(config, "general", "enabled");
+	if (!enabled || ast_false(enabled)) {
+		ast_config_destroy(config);
+		return -1;
+	}
+
+	/* Construct our Server URI */
+	bindaddr = ast_config_option(config, "general", "bindaddr");
+	if (!bindaddr) {
+		ast_config_destroy(config);
+		return -1;
+	}
+
+	bindport = ast_config_option(config, "general", "bindport");
+	if (!bindport) {
+		bindport = "8088";
+	}
+
+	prefix = ast_config_option(config, "general", "prefix");
+
+	snprintf(server_uri, sizeof(server_uri), "http://%s:%s%s/%s", bindaddr, bindport, S_OR(prefix, ""), TEST_URI);
+
+	ast_config_destroy(config);
+
+	return 0;
+}
+
+static int reload_module(void)
+{
+	return process_config(1);
+}
+
+static int load_module(void)
+{
+	if (process_config(0)) {
+		return AST_MODULE_LOAD_DECLINE;
+	}
+
+	if (ast_http_uri_link(&test_uri)) {
+		return AST_MODULE_LOAD_DECLINE;
+	}
+
+	AST_TEST_REGISTER(create_nominal);
+
+	AST_TEST_REGISTER(retrieve_nominal);
+	AST_TEST_REGISTER(retrieve_etag);
+	AST_TEST_REGISTER(retrieve_expires);
+	AST_TEST_REGISTER(retrieve_etag_expired);
+	AST_TEST_REGISTER(retrieve_cache_control_age);
+	AST_TEST_REGISTER(retrieve_cache_control_directives);
+
+	ast_test_register_init(CATEGORY, pre_test_cb);
+
+	return AST_MODULE_LOAD_SUCCESS;
+}
+
+static int unload_module(void)
+{
+	ast_http_uri_unlink(&test_uri);
+
+	AST_TEST_UNREGISTER(create_nominal);
+
+	AST_TEST_UNREGISTER(retrieve_nominal);
+	AST_TEST_UNREGISTER(retrieve_etag);
+	AST_TEST_UNREGISTER(retrieve_expires);
+	AST_TEST_UNREGISTER(retrieve_etag_expired);
+	AST_TEST_UNREGISTER(retrieve_cache_control_age);
+	AST_TEST_UNREGISTER(retrieve_cache_control_directives);
+
+	return 0;
+}
+
+AST_MODULE_INFO(ASTERISK_GPL_KEY, AST_MODFLAG_LOAD_ORDER, "HTTP Media Cache Backend Tests",
+		.support_level = AST_MODULE_SUPPORT_CORE,
+		.load = load_module,
+		.reload = reload_module,
+		.unload = unload_module,
+		.load_pri = AST_MODPRI_DEFAULT,
+	);