increase buffer for base64decoding and nulltemrinate anything we get

Changelog

@@ -1,5 +1,9 @@
 Version 0.4:
 =============
+2026-04-17:
+- adding function to request a certain headline
+- base64decode increase the outputbuffer by 2 bytes for null-temrinated strings
+
 2026-04-16:
 - base64encode and base64decode implemented
 

UDPTCPNetwork-webutils.h

@@ -60,6 +60,8 @@ class WebRequestBuffer {
         std::string GetProtocolVersion() { return protocol_version; };
         int GetRequestCmdObj(std::string *cmd, std::string *obj, JSONParse *jp);
         std::string GetCookie(std::string name);
+        std::string GetHeader(std::string name);
+        std::list<WebHeaderLine> GetHeaders();
 };
 
 

ssl.cc

@@ -463,7 +463,7 @@ int base64decode(std::string input, char **obuffer, int *olen) {
 
 	// calculate and realloc size of buffer
 	if (*obuffer == NULL || (1 + ilen*3/4) < *olen) {
-		*olen = 1 + ilen*3/4;
+		*olen = 2 + ilen*3/4;			// increase buffer by two ... null terminated string?
 		*obuffer = (char*) realloc(*obuffer, *olen);
 	}
 
@@ -493,6 +493,7 @@ int base64decode(std::string input, char **obuffer, int *olen) {
 		(*obuffer)[ocnt++] = c;
 	}
 	*olen = ocnt;
+	(*obuffer)[ocnt] = 0;	// nullterminate - just to prevent unseen stuff
 	return 1;
 };
 

test-webserver.cc

@@ -33,6 +33,15 @@ int SimpleWebServer::HandleRequest (WebRequestBuffer *requestbuffer, WebServerCl
     std::string request = requestbuffer->GetRequest();
     printf ("SimpleWebServerClient::HandleRequest() Request:%s\n", request.c_str());
 
+    debug ("Recived Headers");
+    std::list<WebHeaderLine> hl;
+    std::list<WebHeaderLine>::iterator il;
+    std::string s;
+    hl = requestbuffer->GetHeaders();
+    for (il = hl.begin(); il != hl.end(); il++) {
+        debug ("'%s' -> '%s' ", il->parameter.c_str(), requestbuffer->GetHeader(il->parameter).c_str());
+    }
+
     if (request.compare ("/") == 0) request = "/index.html";
     if (request.find("/big.html") != std::string::npos) {
         std::string htmlfile = GenerateBigHtmlFile(8*1024*1024);

webutils.cc

@@ -212,3 +212,23 @@ std::string WebRequestBuffer::GetCookie(std::string name) {
 };
 
 
+std::string WebRequestBuffer::GetHeader(std::string name) {
+    std::list<WebHeaderLine>::iterator il;
+    std::size_t i;
+    std::string s;
+
+    //
+    // search for coockie line
+    for (il = headerlines.begin(); il != headerlines.end(); il++) {
+        if ((string_to_lower(il->parameter).compare(string_to_lower(name)) == 0) ||
+            (string_to_lower(il->parameter).compare(string_to_lower(name) + ':') == 0)) {
+            return il->value;
+        }
+    }
+    return "";
+};
+
+
+std::list<WebHeaderLine> WebRequestBuffer::GetHeaders() {
+    return headerlines;
+};