Cleanup handling of environment variables

Signed-off-by: Lars Hjemli <hjemli@gmail.com>

3 files changed, 44 insertions, 32 deletions

diff --git a/cgit.c b/cgit.c
index 7b228af..a92383d 100644
--- a/cgit.c
+++ b/cgit.c
@@ -216,4 +216,9 @@ static void querystring_cb(const char *name, const char *value)
 }
 
+char *xstrdupn(const char *str)
+{
+	return (str ? xstrdup(str) : NULL);
+}
+
 static void prepare_context(struct cgit_context *ctx)
 {
@@ -246,4 +251,13 @@ static void prepare_context(struct cgit_context *ctx)
 	ctx->cfg.summary_log = 10;
 	ctx->cfg.summary_tags = 10;
+	ctx->env.cgit_config = xstrdupn(getenv("CGIT_CONFIG"));
+	ctx->env.http_host = xstrdupn(getenv("HTTP_HOST"));
+	ctx->env.https = xstrdupn(getenv("HTTPS"));
+	ctx->env.path_info = xstrdupn(getenv("PATH_INFO"));
+	ctx->env.query_string = xstrdupn(getenv("QUERY_STRING"));
+	ctx->env.request_method = xstrdupn(getenv("REQUEST_METHOD"));
+	ctx->env.script_name = xstrdupn(getenv("SCRIPT_NAME"));
+	ctx->env.server_name = xstrdupn(getenv("SERVER_NAME"));
+	ctx->env.server_port = xstrdupn(getenv("SERVER_PORT"));
 	ctx->page.mimetype = "text/html";
 	ctx->page.charset = PAGE_ENCODING;
@@ -254,4 +268,10 @@ static void prepare_context(struct cgit_context *ctx)
 	ctx->page.etag = NULL;
 	memset(&ctx->cfg.mimetypes, 0, sizeof(struct string_list));
+	if (ctx->env.script_name)
+		ctx->cfg.script_name = ctx->env.script_name;
+	if (ctx->env.query_string)
+		ctx->qry.raw = ctx->env.query_string;
+	if (!ctx->env.cgit_config)
+		ctx->env.cgit_config = CGIT_CONFIG;
 }
 
@@ -478,6 +498,4 @@ static int calc_ttl()
 int main(int argc, const char **argv)
 {
-	const char *cgit_config_env = getenv("CGIT_CONFIG");
-	const char *method = getenv("REQUEST_METHOD");
 	const char *path;
 	char *qry;
@@ -489,11 +507,6 @@ int main(int argc, const char **argv)
 	cgit_repolist.repos = NULL;
 
-	if (getenv("SCRIPT_NAME"))
-		ctx.cfg.script_name = xstrdup(getenv("SCRIPT_NAME"));
-	if (getenv("QUERY_STRING"))
-		ctx.qry.raw = xstrdup(getenv("QUERY_STRING"));
 	cgit_parse_args(argc, argv);
-	parse_configfile(cgit_config_env ? cgit_config_env : CGIT_CONFIG,
-			 config_cb);
+	parse_configfile(ctx.env.cgit_config, config_cb);
 	ctx.repo = NULL;
 	http_parse_querystring(ctx.qry.raw, querystring_cb);
@@ -510,5 +523,5 @@ int main(int argc, const char **argv)
 	 * long as PATH_INFO is included in the cache lookup key).
 	 */
-	path = getenv("PATH_INFO");
+	path = ctx.env.path_info;
 	if (!ctx.qry.url && path) {
 		if (path[0] == '/')
@@ -526,5 +539,5 @@ int main(int argc, const char **argv)
 	ttl = calc_ttl();
 	ctx.page.expires += ttl*60;
-	if (method && !strcmp(method, "HEAD"))
+	if (ctx.env.request_method && !strcmp(ctx.env.request_method, "HEAD"))
 		ctx.cfg.nocache = 1;
 	if (ctx.cfg.nocache)
diff --git a/cgit.h b/cgit.h
index 4c854ea..893231d 100644
--- a/cgit.h
+++ b/cgit.h
@@ -208,5 +208,18 @@ struct cgit_page {
 };
 
+struct cgit_environment {
+	char *cgit_config;
+	char *http_host;
+	char *https;
+	char *path_info;
+	char *query_string;
+	char *request_method;
+	char *script_name;
+	char *server_name;
+	char *server_port;
+};
+
 struct cgit_context {
+	struct cgit_environment env;
 	struct cgit_query qry;
 	struct cgit_config cfg;
diff --git a/ui-shared.c b/ui-shared.c
index 015c52b..538ddda 100644
--- a/ui-shared.c
+++ b/ui-shared.c
@@ -37,8 +37,5 @@ void cgit_print_error(char *msg)
 char *cgit_httpscheme()
 {
-	char *https;
-
-	https = getenv("HTTPS");
-	if (https != NULL && strcmp(https, "on") == 0)
+	if (ctx.env.https && !strcmp(ctx.env.https, "on"))
 		return "https://";
 	else
@@ -48,20 +45,11 @@ char *cgit_httpscheme()
 char *cgit_hosturl()
 {
-	char *host, *port;
-
-	host = getenv("HTTP_HOST");
-	if (host) {
-		host = xstrdup(host);
-	} else {
-		host = getenv("SERVER_NAME");
-		if (!host)
+	if (ctx.env.http_host)
+		return ctx.env.http_host;
+	if (!ctx.env.server_name)
 			return NULL;
-		port = getenv("SERVER_PORT");
-		if (port && atoi(port) != 80)
-			host = xstrdup(fmt("%s:%d", host, atoi(port)));
-		else
-			host = xstrdup(host);
-	}
-	return host;
+	if (!ctx.env.server_port || atoi(ctx.env.server_port) == 80)
+		return ctx.env.server_name;
+	return xstrdup(fmt("%s:%s", ctx.env.server_name, ctx.env.server_port));
 }
 
@@ -468,6 +456,4 @@ void cgit_print_age(time_t t, time_t max_relative, char *format)
 void cgit_print_http_headers(struct cgit_context *ctx)
 {
-	const char *method = getenv("REQUEST_METHOD");
-
 	if (ctx->cfg.embedded)
 		return;
@@ -490,5 +476,5 @@ void cgit_print_http_headers(struct cgit_context *ctx)
 		htmlf("ETag: \"%s\"\n", ctx->page.etag);
 	html("\n");
-	if (method && !strcmp(method, "HEAD"))
+	if (ctx->env.request_method && !strcmp(ctx->env.request_method, "HEAD"))
 		exit(0);
 }