Fix compiler warnings regarding const modifiers

src/lib/http.c

@@ -132,7 +132,7 @@ int http_parse_header_field(http_hdr *hdr, const char *buf, const char *end_ptr,
     if (hdr->last_field_num > list_size(hdr->fields))
         return http_error(HTTP_ERROR_GENERAL);
 
-    char *pos1 = (char *) buf, *pos2 = (char *) end_ptr;
+    const char *pos1 = buf, *pos2 = end_ptr;
     if (buf[0] == ' ' || buf[0] == '\t') {
         if (hdr->last_field_num == -1)
             return http_error(HTTP_ERROR_GENERAL);

src/lib/proxy.c

@@ -211,13 +211,13 @@ int proxy_request_header(http_req *req, sock *sock) {
         if (forwarded == NULL) {
             http_add_header_field(&req->hdr, "X-Forwarded-Host", http_get_header_field(&req->hdr, "Host"));
         } else {
-            char *ptr = strchr(forwarded, ',');
+            const char *ptr = strchr(forwarded, ',');
             unsigned long len;
             if (ptr != NULL) len = ptr - forwarded;
             else len = strlen(forwarded);
             ptr = strstr(forwarded, "host=");
             if ((ptr - forwarded) < len) {
-                char *end = strchr(ptr, ';');
+                const char *end = strchr(ptr, ';');
                 if (end == NULL) len -= (ptr - forwarded);
                 else len = (end - ptr);
                 len -= 5;
@@ -233,13 +233,13 @@ int proxy_request_header(http_req *req, sock *sock) {
         if (forwarded == NULL) {
             http_add_header_field(&req->hdr, "X-Forwarded-Proto", sock->enc ? "https" : "http");
         } else {
-            char *ptr = strchr(forwarded, ',');
+            const char *ptr = strchr(forwarded, ',');
             unsigned long len;
             if (ptr != NULL) len = ptr - forwarded;
             else len = strlen(forwarded);
             ptr = strstr(forwarded, "proto=");
             if ((ptr - forwarded) < len) {
-                char *end = strchr(ptr, ';');
+                const char *end = strchr(ptr, ';');
                 if (end == NULL) len -= (ptr - forwarded);
                 else len = (end - ptr);
                 len -= 6;

src/lib/uri.c

@@ -38,7 +38,7 @@ int path_exists(const char *path) {
     return ret == 0;
 }
 
-int uri_init(http_uri *uri, const char *webroot, const char *uri_str, int dir_mode) {
+int uri_init(http_uri *uri, const char *webroot, char *uri_str, int dir_mode) {
     char buf0[1024], buf1[1024], buf2[1024], buf3[1024], buf4[1024];
     int p_len;
 

src/lib/uri.h

@@ -42,7 +42,7 @@ typedef struct {
 } http_uri;
 
 
-int uri_init(http_uri *uri, const char *webroot, const char *uri_str, int dir_mode);
+int uri_init(http_uri *uri, const char *webroot, char *uri_str, int dir_mode);
 
 int uri_init_cache(http_uri *uri);
 

src/lib/utils.c

@@ -193,7 +193,7 @@ int strcpy_rem_webroot(char *dst, const char *src, const char *webroot) {
     return 0;
 }
 
-int str_trim(char **start, char **end) {
+int str_trim(const char **start, const char **end) {
     if (start == NULL || end == NULL || *start == NULL || *end == NULL)
         return -1;
 
@@ -204,7 +204,7 @@ int str_trim(char **start, char **end) {
     return 0;
 }
 
-int str_trim_lws(char **start, char **end) {
+int str_trim_lws(const char **start, const char **end) {
     if (start == NULL || end == NULL || *start == NULL || *end == NULL)
         return -1;
 

src/lib/utils.h

@@ -33,9 +33,9 @@ int mime_is_text(const char *restrict type);
 
 int strcpy_rem_webroot(char *dst, const char *str, const char *webroot);
 
-int str_trim(char **start, char **end);
+int str_trim(const char **start, const char **end);
 
-int str_trim_lws(char **start, char **end);
+int str_trim_lws(const char **start, const char **end);
 
 int streq(const char *restrict str1, const char *restrict str2);
 

src/worker/local_handler.c

@@ -39,7 +39,7 @@ void local_handler_func(client_ctx_t *ctx) {
 static int range_handler(client_ctx_t *ctx) {
     char buf[64];
     long num0, num1, num2;
-    char *ptr;
+    const char *ptr;
     int mode;
     const char *range = http_get_header_field(&ctx->req.hdr, "Range");